Although carbon mitigation in power industry is attracting more and more attention around the world, the large scale application of carbon capture technology is obstructed because of the enormous energy consumption and huge capital investment required. In this study, an integrated system with power generation, CO₂ capture and heat supply are proposed, which adopts three measures to reutilize the waste heat released from the CO₂ capture process, including extracted steam recirculation, a CO₂ Rankine cycle and a radiant floor heat subsystem. Amongst these measures, the radiant floor heat subsystem can efficiently reuse the relatively low temperature waste energy in the absorbent cooler. Through thermodynamic analysis, it is determined that the power output of the new integrated system is 19.48 MW higher compared with the decarbonization Natural Gas Combined Cycle (NGCC) power plant without system integration. On the other hand, 247.59 MW of heat can be recovered through the radiant floor heat subsystem, leading to an improved overall energy efficiency of 73.6%. In terms of the economic performance, the integration requires only 2.6% more capital investment than a decarbonization NGCC power plant without system integration and obtains extra revenue of 3.40 $/MWh from the simultaneous heat supply, which reduces the cost of CO₂ avoided by 22.3%. The results prove the economic and efficiency potential of a NGCC power plant integrated with carbon capture, which may promote the industrial demonstration of carbon capture theology.

Photovoltaic (PV) systems are playing a more and more important role as a renewable energy supplier. However, their large-scale applications is still limited by low conversion efficiency and high land-use requirement, especially for those areas where land and solar energy resources are more important for agriculture. In this paper, we suggest a dish-type high-concentration photovoltaic system, with which the competition between sunlight for crops' growth and PV application is solved by beam-splitting techniques. A purposely-designed beam filter acts as a solar spectrum splitter, and the most effective bands of solar spectrum for plant growth are transmitted down to plants while the other parts are all directed to the solar cell receiver. The spectral and spatial distribution of radiant intensity is investigated by ray tracing method, and the quantitative evaluation of the beam splitting effect on crop growth and PV power generation is provided in detail. The results show that, on one hand, the proposed system is superior to other natural and artificial light sources at driving the photosynthetic process (thus promoting crop growth); on the other hand, it generates PV power with high efficiency. Furthermore, the design can be optimized for certain kinds of plants and PV generation, both or independently. This spectral splitting scheme opens a promising future for PV applications in cooperation with precision farming.

As integrated circuit technology continues to advance, clock tree synthesis has become increasingly significant in the design of ultra-large-scale integrated circuits. Traditional clock tree synthesis methods often face challenges such as insufficient computational resources and buffer fan-out limitations when dealing with ultra-large-scale clock trees. To address this issue, this paper proposes an improved clock tree synthesis algorithm called incomplete balanced KSR (IB-KSR). Building upon the KSR algorithm, this proposed algorithm efficiently reduces the consumption of computational resources and constrains the fan-out of each buffer by incorporating incomplete minimum spanning tree (IMST) technology and a clustering strategy grounded in Balanced Split. In experiments, the IB-KSR algorithm was compared with the GSR algorithm. The results indicated that IB-KSR reduced the global skew of the clock tree by 43.4% and decreased the average latency by 34.3%. Furthermore, during program execution, IB-KSR maintained low computational resource consumption.

The luminescent coupling effect in practical multi-junction solar cell is spatially in-homogeneous even under uniform irradiation and temperature distribution. The spacial inhomogeneity of luminescent coupling is modeled and simulated under various scenarios. Quasi three-dimensional equivalent model of tandem solar cell is extended to adapt to temperature-dependent luminescent coupling. Vertical current of each region of the cell is dominated by temperature or irradiation. In addition, the luminescent coupling current of each subcell pair is mainly regulated by the surface voltage profile of the cell. Front grids, busbars, and lateral resistance have a great impact on the luminescent coupling current. Non-uniform irradiation only affects the shape of contour lines, but the overall trend of luminescent coupling current profile remains unchanged. Moreover, when temperature distribution variance is large, some areas of the photovoltaic cell will reverse bias and convert to a load, which leads to a rather irregular distribution of luminescent coupling current.

We demonstrate a method of reflectivity measurement for a weak fiber Bragg grating (FBG) sensor array based on frequency shifted interferometry (FSI). In the scheme, the measured weak FBG sensor array was connected after a referenced weak FBG, by using frequency shifted interferometry, the reflectivity of the referenced FBG and the reflection amplitude spectrum of each FBG from the sensor array were obtained respectively, and then each grating reflectivity was iteratively calculated by using the spectral shadowing removal method. A sensor array of 60-weak FBGs with an average peak reflectivity around -25 dB was experimentally investigated. The obtained peak reflectivity ranged from -37.7 to -21.7 dB with an average value of -26.0 dB. Error analysis indicates the average reflectivity measurement stability for all FBGs was $\pm$ 1.93dB. The results reveal that this work presents a feasible, simple and low-cost method of reflectivity measurement for large-scale weak FBG sensor arrays.