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Hua Li
College of Engineering, Nanjing Agricultural University, Nanjing 210031, China

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Journal article
Published: 28 January 2021 in Sustainability
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In view of the low seeding efficiency and precision of seeders used for Brassica chinensis in China, a new double-row pneumatic precision metering device for Brassica chinensis was designed, fabricated, and evaluated. With the characteristics of small size and high sphericity of Brassica chinensis seeds in mind, the structure and key dimensions of the metering plate were determined, and a force analysis of the seed-filling process was carried out. The negative pressure (NP), angular velocity (AV) of the metering plate, and cone angle (CA) of the suction hole were selected as the main influencing factors of the experiment. In order to explore the influence of each single factor and the interaction between factors on the seeding performance, a single factor experiment and a central composite design (CCD) experiment were designed, respectively, and the experimental results were analyzed by analysis of variance (ANOVA). After optimizing the main influencing factors such that the target of the qualified index (QI) was greater than 94% and the miss index (MI) was less than 2.5%, it was found that when CA was 60°, NP was 1.55–1.72 kPa, and AV was 1.1–1.9 rad/s, the seeding performance was excellent. The bench verification results of seeding performance (94% ≤ Q ≤ 100%, 0 ≤ M ≤ 2.5%) and the coefficient of variation (CV) of seed mass (CV of seed mass in outer and inner circle: 5.15%; CV of total seed mass: 8.60%) under the condition of parameter optimization were analyzed; as a result, the accuracy of the parameter optimization was confirmed.

ACS Style

Bohong Li; Riaz Ahmad; Xindan Qi; Hua Li; Samuel Nyambura; Jufei Wang; Xi Chen; Shengbing Li. Design Evaluation and Performance Analysis of a Double-Row Pneumatic Precision Metering Device for Brassica chinensis. Sustainability 2021, 13, 1374 .

AMA Style

Bohong Li, Riaz Ahmad, Xindan Qi, Hua Li, Samuel Nyambura, Jufei Wang, Xi Chen, Shengbing Li. Design Evaluation and Performance Analysis of a Double-Row Pneumatic Precision Metering Device for Brassica chinensis. Sustainability. 2021; 13 (3):1374.

Chicago/Turabian Style

Bohong Li; Riaz Ahmad; Xindan Qi; Hua Li; Samuel Nyambura; Jufei Wang; Xi Chen; Shengbing Li. 2021. "Design Evaluation and Performance Analysis of a Double-Row Pneumatic Precision Metering Device for Brassica chinensis." Sustainability 13, no. 3: 1374.

Journal article
Published: 01 May 2019 in Applied Sciences
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In this research, artemisia selengensis was used to produce biochar via microwave pyrolysis. The influence of pyrolysis temperature, heating rates, temperature holding time and additive on the biochar yield and adsorbability were all investigated. The results suggest that the biochar yield decreased with the increase of pyrolysis temperature while the adsorbability of the biochar increased with an increase of the pyrolysis temperature; the biochar yield and its adsorbability could achieve the desired value when the heating rate and temperature holding time were in a specific scope; the biochar yield decreased when an additive was added; the adsorbability of the biochar could be increased by adding ZnCl2 (metal chloride) and Na2CO3 (metal carbonate). According to the orthogonal experiments, the optimal conditions for biochar production were: pyrolysis temperature 550 °C, heating rate 2 °C/s, temperature holding time 15 min, without additive.

ACS Style

Xuhui Li; Kunquan Li; Chunlei Geng; Hamed El Mashad; Hua Li; Wenqing Yin. Biochar from Microwave Pyrolysis of Artemisia Slengensis: Characterization and Methylene Blue Adsorption Capacity. Applied Sciences 2019, 9, 1813 .

AMA Style

Xuhui Li, Kunquan Li, Chunlei Geng, Hamed El Mashad, Hua Li, Wenqing Yin. Biochar from Microwave Pyrolysis of Artemisia Slengensis: Characterization and Methylene Blue Adsorption Capacity. Applied Sciences. 2019; 9 (9):1813.

Chicago/Turabian Style

Xuhui Li; Kunquan Li; Chunlei Geng; Hamed El Mashad; Hua Li; Wenqing Yin. 2019. "Biochar from Microwave Pyrolysis of Artemisia Slengensis: Characterization and Methylene Blue Adsorption Capacity." Applied Sciences 9, no. 9: 1813.

Journal article
Published: 20 September 2018 in Computers and Electronics in Agriculture
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The rice-threshed mixture presents the phenomenon of axial flow and radial stratification under the impact of airflow field, gravitational field, and sieve. We used the method that couples computational fluid dynamics (CFD) with the discrete element method (DEM) to numerically calculate the process described above, and investigated the influence of inlet airflow velocity, diameter and rotating speed of cylindrical sieve on the movement rules and screening characteristics of rice-threshed mixture components (grains, shriveled grains, and short stalks). The nonlinear fitting curve showed that inlet airflow velocity had a significant influence on the axial average velocity of mixture components, the sifting grain mass distribution, and screening loss rate. The greatest screening efficiency give with an inlet airflow velocity of 9.67 m/s. The diameter of cylindrical sieve has a large influence on the axial average velocity of grains and short stalks. Cylindrical sieve rotating speed has a great influence on the axial average velocity of the short stalks, screening loss rate, and screening efficiency. Validation test for one of parameters shown that the error for the screening cleaning rate of each collection area is below 5%, while the screening loss rate and screening efficiency error are 8.11% and 3.3%, respectively. The research result indicates that the CFD-DEM coupling method has scientific and practical value in calculating the movement rules and screening characteristics of rice-threshed mixture in a cylindrical sieve.

ACS Style

Jianbo Yuan; Chongyou Wu; Hua Li; Xindan Qi; Xingxing Xiao; Xinxin Shi. Movement rules and screening characteristics of rice-threshed mixture separation through a cylinder sieve. Computers and Electronics in Agriculture 2018, 154, 320 -329.

AMA Style

Jianbo Yuan, Chongyou Wu, Hua Li, Xindan Qi, Xingxing Xiao, Xinxin Shi. Movement rules and screening characteristics of rice-threshed mixture separation through a cylinder sieve. Computers and Electronics in Agriculture. 2018; 154 ():320-329.

Chicago/Turabian Style

Jianbo Yuan; Chongyou Wu; Hua Li; Xindan Qi; Xingxing Xiao; Xinxin Shi. 2018. "Movement rules and screening characteristics of rice-threshed mixture separation through a cylinder sieve." Computers and Electronics in Agriculture 154, no. : 320-329.

Journals
Published: 21 November 2017 in RSC Advances
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Rice straw is an abundant biomass resource, and it can produce hydrogen-rich fuel gas through microwave pyrolysis, so it has many potential applications.

ACS Style

Xuhui Li; Kunquan Li; Chunlei Geng; Hamed El Mashad; Hua Li; Wenqing Yin. An economic analysis of rice straw microwave pyrolysis for hydrogen-rich fuel gas. RSC Advances 2017, 7, 53396 -53400.

AMA Style

Xuhui Li, Kunquan Li, Chunlei Geng, Hamed El Mashad, Hua Li, Wenqing Yin. An economic analysis of rice straw microwave pyrolysis for hydrogen-rich fuel gas. RSC Advances. 2017; 7 (84):53396-53400.

Chicago/Turabian Style

Xuhui Li; Kunquan Li; Chunlei Geng; Hamed El Mashad; Hua Li; Wenqing Yin. 2017. "An economic analysis of rice straw microwave pyrolysis for hydrogen-rich fuel gas." RSC Advances 7, no. 84: 53396-53400.

Journal article
Published: 01 January 2016 in International Journal of Hydrogen Energy
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In this paper, the effects of pyrolysis temperature, microwave power, moisture content and additive on H2 yield is investigated. The feedstock is rice straw, which is the commonest crop straw. And a four-factor four-level orthogonal experiment is designed to reveal the rank of these factors and the optimal pyrolysis condition. The result shows that: when pyrolysis temperature and microwave power increased, H2 yield (vol.%) first increased and then decreased; when moisture content increased, H2 yield decreased; without additive, H2 yield was 36.14% which is the highest. The rank of four factors is moisture content, additive, pyrolysis temperature and microwave power. When the pyrolysis temperature was 700 °C, the microwave power was 2.5 kW, the moisture content was 61.84% and ZnCl2 was used as the additive in microwave-assisted pyrolysis of the rice straw, a high H2 yield of 44.94% was achieved.

ACS Style

Hua Li; Xuhui Li; Le Liu; Kunquan Li; Xiaohua Wang; Hongxiang Li. Experimental study of microwave-assisted pyrolysis of rice straw for hydrogen production. International Journal of Hydrogen Energy 2016, 41, 2263 -2267.

AMA Style

Hua Li, Xuhui Li, Le Liu, Kunquan Li, Xiaohua Wang, Hongxiang Li. Experimental study of microwave-assisted pyrolysis of rice straw for hydrogen production. International Journal of Hydrogen Energy. 2016; 41 (4):2263-2267.

Chicago/Turabian Style

Hua Li; Xuhui Li; Le Liu; Kunquan Li; Xiaohua Wang; Hongxiang Li. 2016. "Experimental study of microwave-assisted pyrolysis of rice straw for hydrogen production." International Journal of Hydrogen Energy 41, no. 4: 2263-2267.

Journal article
Published: 10 September 2015 in Future Internet
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To monitor multiple environmental factors of henhouses in modern chicken farms, a henhouse online monitoring system based on wireless sensor network was developed using wireless sensor technology and computer network technology. Sensor data compensation and correction were designed to be achieved using software and data fitting methods, data reliable transmission achieved using a data loss recovery strategy, and data missing during monitoring addressed using a self-decision and online filling method. Operation test of the system showed that: The system was economic and reliable; it enabled wireless monitoring and Web display of the environmental factors of a henhouse; and the root mean square errors (RMSEs) between the estimated values from the self-decision and on-line filling method and experimental values of the four environmental factors were 0.1698, 3.0859, 77 and 0.094, respectively, indicative of high estimation accuracy. The system can provide support for modern management of henhouses and can be transplanted to related monitoring scenarios in the agricultural field.

ACS Style

Hua Li; Huan Wang; Wenqing Yin; Yongwei Li; Yan Qian; Fei Hu. Development of a Remote Monitoring System for Henhouse Environment Based on IoT Technology. Future Internet 2015, 7, 329 -341.

AMA Style

Hua Li, Huan Wang, Wenqing Yin, Yongwei Li, Yan Qian, Fei Hu. Development of a Remote Monitoring System for Henhouse Environment Based on IoT Technology. Future Internet. 2015; 7 (3):329-341.

Chicago/Turabian Style

Hua Li; Huan Wang; Wenqing Yin; Yongwei Li; Yan Qian; Fei Hu. 2015. "Development of a Remote Monitoring System for Henhouse Environment Based on IoT Technology." Future Internet 7, no. 3: 329-341.

Conference paper
Published: 09 April 2009 in Lecture Notes in Control and Information Sciences
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The past efforts made on the corn cleaning dynamics were reviewed. Based on Discrete Element Method model, a simulation method for corn cleaning dynamics was then proposed, composing the following design factors: 1. 2-D discrete model and its related factors; 2. parities and magnitude of computation, consideration of the two factors upon application; 3. test platform design. The implementation of this plan will illustrate the dynamics of corn cleaning, benefiting the efficiency of cleaning machine design and the improvement of production economies.

ACS Style

Hua Li; Hongju Gong; Wenqing Yin. Design of Simulation Strategy for Corn Cleaningon Discrete Element Method. Lecture Notes in Control and Information Sciences 2009, 603 -611.

AMA Style

Hua Li, Hongju Gong, Wenqing Yin. Design of Simulation Strategy for Corn Cleaningon Discrete Element Method. Lecture Notes in Control and Information Sciences. 2009; ():603-611.

Chicago/Turabian Style

Hua Li; Hongju Gong; Wenqing Yin. 2009. "Design of Simulation Strategy for Corn Cleaningon Discrete Element Method." Lecture Notes in Control and Information Sciences , no. : 603-611.

Conference paper
Published: 08 April 2009 in Lecture Notes in Control and Information Sciences
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ACS Style

Xindan Qi; Hua Li; Wenqing Yin. DEVELOPMENT OF THE FARM MACHINERY STATISTICAL MANAGEMENT SYSTEM BASED ON WEB. Lecture Notes in Control and Information Sciences 2009, 1309 -1317.

AMA Style

Xindan Qi, Hua Li, Wenqing Yin. DEVELOPMENT OF THE FARM MACHINERY STATISTICAL MANAGEMENT SYSTEM BASED ON WEB. Lecture Notes in Control and Information Sciences. 2009; ():1309-1317.

Chicago/Turabian Style

Xindan Qi; Hua Li; Wenqing Yin. 2009. "DEVELOPMENT OF THE FARM MACHINERY STATISTICAL MANAGEMENT SYSTEM BASED ON WEB." Lecture Notes in Control and Information Sciences , no. : 1309-1317.