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Hypertension has become the greatest risk factor for death in elderly populations. As factors influencing cardiovascular disease, indoor environmental parameters pose potential risks for older adults. In this study, elderly residents in Dalian (Liaoning Province, China) urban dwellings were selected as the research subjects, and the environmental parameters of the dwellings’ main activity rooms and the blood pressure parameters of the older adults were measured. Based on the Long Short-Term Memory (LSTM) deep learning algorithm and Bayesian fitting method, a hypertension disease model was established using the long-term environmental parameters to predict the hypertension risk of older adults in their building’s environment. The results showed that temperature, humidity, and some air quality parameters had an impact on blood pressure under single environmental factor, and the comprehensive environmental risks of high systolic blood pressure, high diastolic blood pressure, and high blood pressure were 16.44%, 0%, and 16.44% for the male elderly and 14.11%, 7.14%, and 17.55% for the female elderly, respectively. By comparing the results for the blood pressure measurement and prediction, it can be observed that the risk error of hypertension obtained by the algorithm maintains the variables’ relationship, and the result of the algorithm is reliable in this period. This technology can provide a basis for measuring environmental parameters and will be conducive to the development of an ecological smart building environment.
Rui Zhu; Yang Lv; Zhimeng Wang; Xi Chen. Prediction of the Hypertension Risk of the Elderly in Built Environments Based on the LSTM Deep Learning and Bayesian Fitting Method. Sustainability 2021, 13, 5724 .
AMA StyleRui Zhu, Yang Lv, Zhimeng Wang, Xi Chen. Prediction of the Hypertension Risk of the Elderly in Built Environments Based on the LSTM Deep Learning and Bayesian Fitting Method. Sustainability. 2021; 13 (10):5724.
Chicago/Turabian StyleRui Zhu; Yang Lv; Zhimeng Wang; Xi Chen. 2021. "Prediction of the Hypertension Risk of the Elderly in Built Environments Based on the LSTM Deep Learning and Bayesian Fitting Method." Sustainability 13, no. 10: 5724.
The climate characteristics of the islands in the Nansha Islands of China are a typical marine climate including high temperature, high relative humidity, high salt content, strong solar radiation, and long sunshine. These can provide suitable conditions for mold reproduction on the surface of the wall in a building. Therefore, mildew pollution on the wall for a long time can easily damage the building’s structure. It does not only directly affect the appearance of the building, but also indirectly affects the indoor environment and human health. In this paper, dominant fungi in the residential buildings on thee Nansha Islands of China are Aspergillus, Penicillium, and Cladosporium. Critical lines of temperature and relative humidity for mould growth on the interior surfaces of island residential building envelopes have been given and discussed. The results show that the risk of mould growth on the wall with different materials, from low to high, is reinforced concrete, aerated concrete block, coral aggregate, brick, and wood. Furthermore, in order to prevent the room regulated by air conditioner from being contaminated by mould, indoor air temperature should be set variable and controlled between 26 °C and 28 °C, the relative humidity should be changed between 50% and 80%.
Xueyan Zhang; Jingyi Liang; Beibei Wang; Yang Lv; Jingchao Xie. Indoor Air Design Parameters of Air Conditioners for Mold-Prevention and Antibacterial in Island Residential Buildings. International Journal of Environmental Research and Public Health 2020, 17, 7316 .
AMA StyleXueyan Zhang, Jingyi Liang, Beibei Wang, Yang Lv, Jingchao Xie. Indoor Air Design Parameters of Air Conditioners for Mold-Prevention and Antibacterial in Island Residential Buildings. International Journal of Environmental Research and Public Health. 2020; 17 (19):7316.
Chicago/Turabian StyleXueyan Zhang; Jingyi Liang; Beibei Wang; Yang Lv; Jingchao Xie. 2020. "Indoor Air Design Parameters of Air Conditioners for Mold-Prevention and Antibacterial in Island Residential Buildings." International Journal of Environmental Research and Public Health 17, no. 19: 7316.
Population growth is forcing people to build near highways. Outdoor air quality affects the indoor environment. Highway traffic-generated ultrafine particles (UFPs) carry toxic substances, posing a serious threat to pedestrians and residents. Existing literature has shown that the primary sources of UFPs are vehicle emissions, combustion sources, and atmospheric transformation. Particle number concentration and size distribution are mainly influenced by the type of vehicle, traffic volume, wind speed and direction, atmospheric dilution and coagulation or distance from the road. The toxicological relationship between UFPs and human health needs to be further investigated. Prediction models of UFPs transport include line source dispersion, street canyon, and Gaussian models. Line source diffusion models can be used in open streets and highways. Street canyon models are mainly used in metropolitan areas. Gaussian models can be used on flat roads. The results of these three models have randomness and uncertainty and are suitable for short-term models. Numerical models can handle diffusion problems of complex street patterns. Commonly used non-numerical models include the STREET, CPBM, and OSPM models. The CPBM model had higher accuracy and practical value than the STREET model. The OSPM model considered the effect of street geometry and weather conditions in the calculation of pollution diffusion. In addition, coupling CFD and GIS technology has become a promising approach in recent years.
Yang Lv; Xi Chen; Shanshan Wei; Rui Zhu; Beibei Wang; Bin Chen; Meng Kong; Jianshun (Jensen) Zhang. Sources, concentrations, and transport models of ultrafine particles near highways: a Literature Review. Building and Environment 2020, 186, 107325 .
AMA StyleYang Lv, Xi Chen, Shanshan Wei, Rui Zhu, Beibei Wang, Bin Chen, Meng Kong, Jianshun (Jensen) Zhang. Sources, concentrations, and transport models of ultrafine particles near highways: a Literature Review. Building and Environment. 2020; 186 ():107325.
Chicago/Turabian StyleYang Lv; Xi Chen; Shanshan Wei; Rui Zhu; Beibei Wang; Bin Chen; Meng Kong; Jianshun (Jensen) Zhang. 2020. "Sources, concentrations, and transport models of ultrafine particles near highways: a Literature Review." Building and Environment 186, no. : 107325.
To control severe air pollution and promote cities sustainable development in an old industrial base of severe cold region in China, it obtained indoor and outdoor PM2.5 permeability coefficients, also bacterial community and source by 16s rDNA gene sequencing technique and BLAST (The Basic Local Alignment Search Tool) source apportionment through long-term monitoring of residences in two typical cities of Heilongjiang Province (Harbin and Mudanjiang) in Northeast China during heating and non-heating season. The results showed that the average permeability coefficient of indoor and outdoor fine particles in Harbin is similar to that in Mudanjiang during non-heating season (Harbin: 0.7131, Mudanjiang: 0.7312) mainly due to natural ventilation. In heating season, Harbin (0.5325) was lower than that in Mudanjiang (0.6918) due to the differences in industrial characteristics and building tightness. The dominant bacteria on indoor and outdoor fine particles was Proteobacteria for two cities, accounted for more than 95 % in non-heating season, while for heating season were Proteobacteria, Firmicutes and Bacteroidetes, which were proportional different due to the different average permeability coefficients, intensities of ultraviolet rays and temperature. And no matter which city in different season, their source proportions of indoor human and outdoor soil are larger than others.
Yang Lv; Yuwei Zhou; Xi Chen; Tongke Zhao; Tao Liu; Xin He; Jing Liu; Xiao Ye. Study on indoor and outdoor permeability coefficients and bacterial components, sources of fine particles in severe cold region of China. Sustainable Cities and Society 2020, 55, 102020 .
AMA StyleYang Lv, Yuwei Zhou, Xi Chen, Tongke Zhao, Tao Liu, Xin He, Jing Liu, Xiao Ye. Study on indoor and outdoor permeability coefficients and bacterial components, sources of fine particles in severe cold region of China. Sustainable Cities and Society. 2020; 55 ():102020.
Chicago/Turabian StyleYang Lv; Yuwei Zhou; Xi Chen; Tongke Zhao; Tao Liu; Xin He; Jing Liu; Xiao Ye. 2020. "Study on indoor and outdoor permeability coefficients and bacterial components, sources of fine particles in severe cold region of China." Sustainable Cities and Society 55, no. : 102020.
The issue of fungal microbial contamination in central air conditioning systems is one of the main problems of biological pollution in building environment. In this study, through the basic experimental study of microwave sterilization under ideal conditions, considering the sterilization effect and energy consumption, the preliminary reference range of microwave sterilization effective temperature is 50°C–59 °C. Through the research of microwave sterilization experimental platform of humidifier in central air conditioning system, it is found that microwave sterilization has a slight influence on the air supply parameters of air conditioning system, and it can be considered under the operating conditions of air conditioning system with low accuracy of air supply parameters. The microwave radiation power of 1000W and 900W can quickly reach the effective sterilization temperature in 5 min, and the sterilization rate can reach 100%. The heating effect of the shielded parts is also very good. Considering the sterilization effect and energy saving, the microwave power of humidifier in central air conditioning system is ideal at 900W for 5 min. Finally, the CST (a 3D electromagnetic field simulator) software was used to simulate and verify the power absorbed by the components, and the uniformity of microwave sterilization was also forecasted.
Yang Lv; Guangyao Hu; Jingyi Liang; Xi Chen; Bin Chen; Tongke Zhao; Xiaoying Lu; Bin Wang; Wenjie Yuan; Yimin Li. Study on microwave sterilization technology of humidifier in central air conditioning system. Building and Environment 2019, 160, 106220 .
AMA StyleYang Lv, Guangyao Hu, Jingyi Liang, Xi Chen, Bin Chen, Tongke Zhao, Xiaoying Lu, Bin Wang, Wenjie Yuan, Yimin Li. Study on microwave sterilization technology of humidifier in central air conditioning system. Building and Environment. 2019; 160 ():106220.
Chicago/Turabian StyleYang Lv; Guangyao Hu; Jingyi Liang; Xi Chen; Bin Chen; Tongke Zhao; Xiaoying Lu; Bin Wang; Wenjie Yuan; Yimin Li. 2019. "Study on microwave sterilization technology of humidifier in central air conditioning system." Building and Environment 160, no. : 106220.
The relationship between indoor air environment and elderly with cardiovascular diseases (CVD) was reviewed through literature research in this paper. In heat and humidity environment, studies have shown that changes in heat environment such as high temperature, cold and step-changes were highly associated with cardiovascular diseases in the elderly. The influence of air humidity on cardiovascular diseases was uncertain. In indoor air quality, PM10, PM2.5, CO, SO2, NO2 and ozone had correlation with cardiovascular diseases in the elderly, with the higher incidence and mortality resulting from higher concentrations of pollutants. It is significant to establish the relationship between indoor air environment and elderly cardiovascular diseases in different climatic zones. The multi-parameter joint action of indoor air environment and comprehensive characterization and evaluation method will be the future research orientation. In addition, the combined field of medicine and engineering may provide more research ideas for environmental and health issues in the future.
Lv Yang; Zhimeng Wang; Bin Chen. Research progress in association between indoor air environment and elderly cardiovascular diseases. IOP Conference Series: Earth and Environmental Science 2019, 257, 012007 .
AMA StyleLv Yang, Zhimeng Wang, Bin Chen. Research progress in association between indoor air environment and elderly cardiovascular diseases. IOP Conference Series: Earth and Environmental Science. 2019; 257 (1):012007.
Chicago/Turabian StyleLv Yang; Zhimeng Wang; Bin Chen. 2019. "Research progress in association between indoor air environment and elderly cardiovascular diseases." IOP Conference Series: Earth and Environmental Science 257, no. 1: 012007.
People spend nearly 90% of their time daily in various indoors, hence indoor environment is important for mortal survival and activity, which affected human health directly. Indoor particulate pollution has become an issue of increasing concern for human beings. Personnel walking behavior and ventilation mode will significantly affect the transfer characteristics of indoor particles. This paper analyzes the effect of walking process on indoor particle resuspension, and different ventilation modes (ceiling exhaust and slit exhaust) on the removal of indoor particulate concentration in experimental and theoretical models. The results show that the particle diffusion model under walking is in good agreement with the experimental results. The particles with different sizes have different diffusion characteristics during walking due to the surface deposition and resuspension rate. Particles of 1.0–3.0 μm have the fastest velocity and the largest amount in suspension, while the smallest for 0.5–1.0 μm particles. Different ventilation modes have different effects on the removal of indoor particles. The particles attenuation index is higher under slit exhaust mode, therefore the ventilation effect is higher than ceiling ventilation mode.
Yang Lv; Haifeng Wang; Yuwei Zhou; Hiroshi Yoshino; Hiroshi Yonekura; Rie Takaki; Genta Kurihara. The influence of ventilation mode and personnel walking behavior on distribution characteristics of indoor particles. Building and Environment 2018, 149, 582 -591.
AMA StyleYang Lv, Haifeng Wang, Yuwei Zhou, Hiroshi Yoshino, Hiroshi Yonekura, Rie Takaki, Genta Kurihara. The influence of ventilation mode and personnel walking behavior on distribution characteristics of indoor particles. Building and Environment. 2018; 149 ():582-591.
Chicago/Turabian StyleYang Lv; Haifeng Wang; Yuwei Zhou; Hiroshi Yoshino; Hiroshi Yonekura; Rie Takaki; Genta Kurihara. 2018. "The influence of ventilation mode and personnel walking behavior on distribution characteristics of indoor particles." Building and Environment 149, no. : 582-591.
Atmospheric particulate matter( PM10, PM2.5) has been the main pollutant in most cities of China in recent years, and the exposure concentration is related to the incidence of human diseases and mortality. The time spent indoors is more than 80% for modern people. Therefore, study on the correlation and exposure level of indoor and outdoor atmospheric particles is important. To research the exposure level in the heating season and non-heating season of indoor and outdoor particulate concentration in severe cold region of China, a total of 110 samples of four types of buildings (office, classroom, urban residence and rural residence) in Daqing, a typical city of severe cold region in China, were tested by particle monitor. Based on the indoor and outdoor environmental parameters, multiple linear regression (MLR) and principal component regression (PCR), established the indoor particulate concentration prediction models. The short and long term exposure of different people in different environments in severe cold region of China was analyzed based on the people's time-activity pattern with the measured data and model. The results showed that as for the short term indoor and outdoor exposure of different people, the average combined exposure of urban people in heating season is 60.0% higher than that in non-heating season, and rural people in heating season 30.2% higher than that in non-heating season. As for the long term indoor and outdoor exposure of different people, the annual average combined exposure of urban people was 9.6% higher than that of rural people. While all for urban and rural people, differences in respiratory rates between genders resulted in an average potential dose of 21. 8% higher in male than in female.
Yang Lv; Yuwei Zhou; Haifeng Wang; Tongke Zhao; Tao Liu; Xin He; Lei Zhang; Jing Liu. Study on the multivariate prediction model and exposure level of indoor and outdoor particulate concentration in severe cold region of China. Ecotoxicology and Environmental Safety 2018, 170, 708 -715.
AMA StyleYang Lv, Yuwei Zhou, Haifeng Wang, Tongke Zhao, Tao Liu, Xin He, Lei Zhang, Jing Liu. Study on the multivariate prediction model and exposure level of indoor and outdoor particulate concentration in severe cold region of China. Ecotoxicology and Environmental Safety. 2018; 170 ():708-715.
Chicago/Turabian StyleYang Lv; Yuwei Zhou; Haifeng Wang; Tongke Zhao; Tao Liu; Xin He; Lei Zhang; Jing Liu. 2018. "Study on the multivariate prediction model and exposure level of indoor and outdoor particulate concentration in severe cold region of China." Ecotoxicology and Environmental Safety 170, no. : 708-715.
In modern society, ventilation is an important method for removing indoor particles. This study applies the parameter of attenuation index to analyse the effect of the removal of indoor particles in the two typical ventilation modes called ceiling exhaust and slit exhaust. Experiment was conducted in a chamber and riboflavin particles were used as the indoor particles source, instantaneous microbial detection (IMD) used to measure the particulate concentration. The results showed there was obvious concentration difference in the vertical distribution for the slit exhaust when indoor particles tended stable, and the smaller the particle size was, the more obvious the difference was. Air exchange rate (ACH) is an important factor affecting the indoor particle concentration distribution. In the process of indoor free settling (air exchange rate is 0 ACH), the sedimentation rate were 0.086 h−1, 0.122 h−1 and 0.173 h−1 for the particles of 0.5-1.0 μm, 1.0-3.0 μm and 3.0-5.0 μm. When the air exchange rate increased to 2.5 ACH, the differences in the attenuation index is significant. There was also a significant linear relationship between air exchange rate and attenuation index. Furthermore, the effect of the slit exhaust mode on the removal of coarse particles is more remarkable as the increasing air exchange rate.
Yang Lv; Haifeng Wang; Shanshan Wei. The transmission characteristics of indoor particles under two ventilation modes. Energy and Buildings 2018, 163, 1 -9.
AMA StyleYang Lv, Haifeng Wang, Shanshan Wei. The transmission characteristics of indoor particles under two ventilation modes. Energy and Buildings. 2018; 163 ():1-9.
Chicago/Turabian StyleYang Lv; Haifeng Wang; Shanshan Wei. 2018. "The transmission characteristics of indoor particles under two ventilation modes." Energy and Buildings 163, no. : 1-9.
Yang Lv; Haifeng Wang; Shanshan Wei; Tingfeng Wu; Tong Liu; Bin Chen. The experimental study on indoor and outdoor penetration coefficient of atmospheric fine particles. Building and Environment 2018, 132, 70 -82.
AMA StyleYang Lv, Haifeng Wang, Shanshan Wei, Tingfeng Wu, Tong Liu, Bin Chen. The experimental study on indoor and outdoor penetration coefficient of atmospheric fine particles. Building and Environment. 2018; 132 ():70-82.
Chicago/Turabian StyleYang Lv; Haifeng Wang; Shanshan Wei; Tingfeng Wu; Tong Liu; Bin Chen. 2018. "The experimental study on indoor and outdoor penetration coefficient of atmospheric fine particles." Building and Environment 132, no. : 70-82.
In modern society, ventilation is an important method for removing indoor particles. This study applies the parameter of attenuation index to analyze the effect of the removal of indoor particles in the two typical ventilation strategies called ceiling exhaust and slit exhaust strategy. Experiment was conducted in a chamber and riboflavin particles were used as the indoor particles source, instantaneous microbial detection (IMD) used to measure the particulate concentration. Conclusions can be found that air exchange rate is an important factor affecting the indoor particle concentration distribution. In the process of indoor free settling(air exchange rate is 0 h-1), the deposition rate were 0.086 h-1, 0.122 h-1, 0.173 h-1 for the particles of 0.5–1.0 μm, 1.0–3.0μm and 3.0–5.0 μm. When the air exchange rate increased to 2.5 h-1, the differences in the attenuation index is significant. There was also a significant linear relationship between air exchange rate and attenuation index. Furthermore, the effect of the slit exhaust strategy on the removal of coarse particles is more remarkable as the increasing air exchange rate.
Yang Lv; Haifeng Wang; Shanshan Wei. The transmission characteristics of indoor particles under different ventilation conditions. E3S Web of Conferences 2017, 22, 00108 .
AMA StyleYang Lv, Haifeng Wang, Shanshan Wei. The transmission characteristics of indoor particles under different ventilation conditions. E3S Web of Conferences. 2017; 22 ():00108.
Chicago/Turabian StyleYang Lv; Haifeng Wang; Shanshan Wei. 2017. "The transmission characteristics of indoor particles under different ventilation conditions." E3S Web of Conferences 22, no. : 00108.
At present, the prevalence of fog and haze seriously affect indoor air quality. More and more attention has been paid to indoor particulate pollution from the society. This paper studies the correlation and influence factors of indoor and outdoor particle concentration of cold area in the summer, which four kinds of building types(office, classroom, rural residential and urban residential) that a total of 110 households in Daqing were measured and analyzed by applying the particle on-line monitors. The results shows that the overall air quality in Daqing is better in summer. There is a linear relationship between the indoor and outdoor particles concentration, and the infiltration factor is applied to represent the degree of correlation. For office and residential buildings, the infiltration factor is 0.7214 and 0.7499. As for the classroom and rural housing, the infiltration factor is 0.9217 and 0.9019 due to the higher air exchange rate. In summer, there are about 80% of the indoor particles coming from outside with natural ventilation buildings. Moreover, there is a significant positive correlation among indoor particles concentration and outdoor particles concentration, temperature and humidity (p<0.05), but different building types have obvious difference. Temperature and humidity as an important factor affecting the concentration of indoor particulate matter, the influence of indoor and outdoor temperature is greater for offices (O1) and classrooms with the glass exterior wall, and the relative humidity is the main factor for the rest of the building with concrete wall structure.
Yang Lv; Haifeng Wang; Shanshan Wei; Lei Zhang; Qi Zhao. The Correlation between Indoor and Outdoor Particulate Matter of Different Building Types in Daqing, China. Procedia Engineering 2017, 205, 360 -367.
AMA StyleYang Lv, Haifeng Wang, Shanshan Wei, Lei Zhang, Qi Zhao. The Correlation between Indoor and Outdoor Particulate Matter of Different Building Types in Daqing, China. Procedia Engineering. 2017; 205 ():360-367.
Chicago/Turabian StyleYang Lv; Haifeng Wang; Shanshan Wei; Lei Zhang; Qi Zhao. 2017. "The Correlation between Indoor and Outdoor Particulate Matter of Different Building Types in Daqing, China." Procedia Engineering 205, no. : 360-367.
This study investigated residential indoor air quality of 10 families with children living in Dalian to better understand how the indoor living environment affects child health. According to the results of field campaigns, average indoor temperatures and relative humidity were 22.7oC and 40%, respectively; the mean level of CO2 was 1034 ppm. The average mass concentration of indoor PM2.5 was 0.066 mg/m3 for all residents. Regarding chemical pollutants, formaldehyde averaged concentrations of 59.9μg/m3, which is lower than the standard value; nevertheless. Volatile organic compounds (VOCs) were always detected at levels far below the recommended limit of 600μg/m3. Semi-VOCs (SVOC) serve as an emerging indoor pollutant, and the mean level was 3164μg/g. Dibutyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP) were the main SVOC pollutants, accounting for 32.5% and 38.2%. Planktonic fungi, accumulation fungi, and adherent fungi consisted in the main biological pollutants. The average mass concentration of planktonic fungi was 526cfu/m3. Accumulated fungi were 264cfu/mg in average and adherent fungi were 1.65cfu/cm2 on average. In conclusion, particulate matter, VOC and formaldehyde lead to the major pollution in indoor environment while the remaining pollutants need further study.
Yang Lv; Zhi-Meng Wang; Shan-Shan Wei; Hai-Feng Wang; Guang-Yao Hu. Indoor Environment Quality in Children’s Homes in Dalian, China. DEStech Transactions on Biology and Health 2017, 1 .
AMA StyleYang Lv, Zhi-Meng Wang, Shan-Shan Wei, Hai-Feng Wang, Guang-Yao Hu. Indoor Environment Quality in Children’s Homes in Dalian, China. DEStech Transactions on Biology and Health. 2017; (mshh):1.
Chicago/Turabian StyleYang Lv; Zhi-Meng Wang; Shan-Shan Wei; Hai-Feng Wang; Guang-Yao Hu. 2017. "Indoor Environment Quality in Children’s Homes in Dalian, China." DEStech Transactions on Biology and Health , no. mshh: 1.
The microbial contamination of central air conditioning system is one of the important factors that affect the indoor air quality. Actual measurement and analysis were carried out on microbial contamination in central air conditioning system at a venue in Dalian, China. Illumina miseq method was used and three fungal samples of two units were analysed by high throughput sequencing. Results showed that the predominant fungus in air conditioning unit A and B were Candida spp. and Cladosporium spp., and two fungus were further used in the hygrothermal response experiment. Based on the data of Cladosporium in hygrothermal response experiment, this paper used the logistic equation and the Gompertz equation to fit the growth predictive model of Cladosporium genera in different temperature and relative humidity conditions, and the square root model was fitted based on the two environmental factors. In addition, the models were carried on the analysis to verify the accuracy and feasibility of the established model equation.
Yang Lv; Guangyao Hu; Chunyang Wang; Wenjie Yuan; Shanshan Wei; Jiaoqi Gao; Boyuan Wang; Fangchao Song. Actual measurement, hygrothermal response experiment and growth prediction analysis of microbial contamination of central air conditioning system in Dalian, China. Scientific Reports 2017, 7, srep44190 .
AMA StyleYang Lv, Guangyao Hu, Chunyang Wang, Wenjie Yuan, Shanshan Wei, Jiaoqi Gao, Boyuan Wang, Fangchao Song. Actual measurement, hygrothermal response experiment and growth prediction analysis of microbial contamination of central air conditioning system in Dalian, China. Scientific Reports. 2017; 7 (1):srep44190.
Chicago/Turabian StyleYang Lv; Guangyao Hu; Chunyang Wang; Wenjie Yuan; Shanshan Wei; Jiaoqi Gao; Boyuan Wang; Fangchao Song. 2017. "Actual measurement, hygrothermal response experiment and growth prediction analysis of microbial contamination of central air conditioning system in Dalian, China." Scientific Reports 7, no. 1: srep44190.
In recent years, prevalence rate of children's allergic diseases gradually increases, children's health problems are not optimistic. Epidemiological cross-sectional survey method was used in this study. 120 school-age children of Grade Four and Five were selected to do the questionnaire on living environment and health problem in Dalian. Then 10 residents were selected to detect indoor environmental information. This study explored the correlation of living environment and children's allergic diseases by some hypothesis testing methods and analyzed exposure levels of various pollutants. Living in the surrounding road, re-decoration, updating ventilation equipment, moist sensation, milk feeding in lactation, usually light sleep were risk factors of certain allergic diseases. SVOC, planktonic fungi, accumulated fungi had a positive effect on disease group, while adherent fungi had a negative effect. The average level of exposure of diseases group is higher than control groups.
Shanshan Wei; Yang Lv; Baiin Fu; Hiroshi Yoshino. The Correlation Study on the Living Environment and Children's Health Problem in Dalian. Procedia Engineering 2016, 146, 158 -165.
AMA StyleShanshan Wei, Yang Lv, Baiin Fu, Hiroshi Yoshino. The Correlation Study on the Living Environment and Children's Health Problem in Dalian. Procedia Engineering. 2016; 146 ():158-165.
Chicago/Turabian StyleShanshan Wei; Yang Lv; Baiin Fu; Hiroshi Yoshino. 2016. "The Correlation Study on the Living Environment and Children's Health Problem in Dalian." Procedia Engineering 146, no. : 158-165.
Actual measurement and analysis were carried out on microbial contamination in central air conditioning system at a venue in Dalian. By studying the microbial contamination in two air handling units with different thermal environments, we found that the fungi and bacteria were common existing on the surface of filter, and the trend of cell density distribution was center > against the wall > corner; The microbial pollution associated in the dust and floating in the air was extremely serious. By comparing the two units, we observed that fungus concentration: Unit A > Unit B, and bacteria concentration: Unit A < Unit B,. And the candida spp. accounted for 80 percent of the sample in Unit A; while in Unit B the cladosporium spp. occupied up to 50%. At the end of the paper, according to the results of measurement and analysis, the methods of controlling microbial contamination in HVAC system have been proposed.
Yang Lv; Chunyang Wang; Wenjie Yuan; Shanshan Wei; Jiaoqi Gao; Boyuan Wang; Fangchao Song. Actual Measurement and Analysis on Microbial Contamination in Central Air Conditioning System at a Venue in Dalian, China. Procedia Engineering 2016, 146, 147 -154.
AMA StyleYang Lv, Chunyang Wang, Wenjie Yuan, Shanshan Wei, Jiaoqi Gao, Boyuan Wang, Fangchao Song. Actual Measurement and Analysis on Microbial Contamination in Central Air Conditioning System at a Venue in Dalian, China. Procedia Engineering. 2016; 146 ():147-154.
Chicago/Turabian StyleYang Lv; Chunyang Wang; Wenjie Yuan; Shanshan Wei; Jiaoqi Gao; Boyuan Wang; Fangchao Song. 2016. "Actual Measurement and Analysis on Microbial Contamination in Central Air Conditioning System at a Venue in Dalian, China." Procedia Engineering 146, no. : 147-154.
With recent improvements to living standards and renovations to many residential buildings, a large volume of new building materials have been utilized throughout China. Formaldehyde and other kinds of VOC pollutants, such as benzene, toluene and xylene found in new building materials, however, emit gases that may lead to some direct or potential health problems. Bake-out with dilution ventilation technology has the potential to shorten emission cycles of indoor air pollution, by which off-gassing from building materials can be reduced. In this paper, a test chamber was used to represent a newly renovated residential room in China. Experiments were conducted to study the applicability of the technology for removing of formaldehyde, benzene, toluene and xylene. A numerical method was used to simulate a 1 m3-chamber-TVOC removing amount under different operating conditions and the concentration change of TVOC during the bake-out exhaust dilution process. The effects of bake-out temperatures and times, ventilation times, and air change rates on removal are also discussed. Implications: VOCs are the main study objective in this paper. With higher baking temperature, longer baking time and longer ventilation time, the removal efficiency is higher in experiment. Removal content of TVOC increases with the increasing number of ACH. With the consideration of energy consumption, it is more reasonable to choose a ventilation time of 4 hours if ACH is 1.2 times/h.
Yang Lv; Jing Liu; Shanshan Wei; Haifeng Wang. Experimental and simulation study on bake-out with dilution ventilation technology for building materials. Journal of the Air & Waste Management Association 2016, 66, 1098 -1108.
AMA StyleYang Lv, Jing Liu, Shanshan Wei, Haifeng Wang. Experimental and simulation study on bake-out with dilution ventilation technology for building materials. Journal of the Air & Waste Management Association. 2016; 66 (11):1098-1108.
Chicago/Turabian StyleYang Lv; Jing Liu; Shanshan Wei; Haifeng Wang. 2016. "Experimental and simulation study on bake-out with dilution ventilation technology for building materials." Journal of the Air & Waste Management Association 66, no. 11: 1098-1108.
In the present study, we have demonstrated that alginate and collagen sponge can act as scaffolds in order to support 3-dimensional structure for the differentiated bone marrow derived mesenchymal stem cells (BMSCs) during chondrogenesis in vitro and in vivo. The chondrogenic induced BMSCs were well distributed and differentiation in scaffolds system before implantation, then they produced sufficient ECM in the implants to form chondroid aggregates in vivo. In our opinion, well-differentiated BMSCs is a crucial feature of cartilage repair and only can be achieved in scaffold matrix. Furthermore, when dealing with cartilage defects, alginate seem to be superior to collagen sponge, and the combinational strategy of pre-induced BMSCs combined with alginate 3D-culture might be useful in improving conventional autologous cells transplantation or free-cells scaffolds.
Jiang Wu; Guang Hui Wang; Hong Zhang; Yu Ping Wu; Yang Cheng Lv; Jing Song Liu; Jie Ke Ma; Jiang Zhu. Chondrogenic Ability of Bone Marrow Mesenchymal Stem Cells in Alginate and Collagen Sponge. Key Engineering Materials 2011, 474-476, 1935 -1938.
AMA StyleJiang Wu, Guang Hui Wang, Hong Zhang, Yu Ping Wu, Yang Cheng Lv, Jing Song Liu, Jie Ke Ma, Jiang Zhu. Chondrogenic Ability of Bone Marrow Mesenchymal Stem Cells in Alginate and Collagen Sponge. Key Engineering Materials. 2011; 474-476 ():1935-1938.
Chicago/Turabian StyleJiang Wu; Guang Hui Wang; Hong Zhang; Yu Ping Wu; Yang Cheng Lv; Jing Song Liu; Jie Ke Ma; Jiang Zhu. 2011. "Chondrogenic Ability of Bone Marrow Mesenchymal Stem Cells in Alginate and Collagen Sponge." Key Engineering Materials 474-476, no. : 1935-1938.
Yang-Xiao Lv; Yun Ling; Huan Li; Lei Zhang. Bis(2,2′-bipyridine-κ2N,N′)(carbonato-κ2O,O′)cobalt(III) trifluoromethanesulfonate. Acta Crystallographica Section E Structure Reports Online 2007, 63, m1906 -m1907.
AMA StyleYang-Xiao Lv, Yun Ling, Huan Li, Lei Zhang. Bis(2,2′-bipyridine-κ2N,N′)(carbonato-κ2O,O′)cobalt(III) trifluoromethanesulfonate. Acta Crystallographica Section E Structure Reports Online. 2007; 63 (7):m1906-m1907.
Chicago/Turabian StyleYang-Xiao Lv; Yun Ling; Huan Li; Lei Zhang. 2007. "Bis(2,2′-bipyridine-κ2N,N′)(carbonato-κ2O,O′)cobalt(III) trifluoromethanesulfonate." Acta Crystallographica Section E Structure Reports Online 63, no. 7: m1906-m1907.