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学者姓名：舒胜文
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We have measured the flexophotovoltaic effect of single crystals of halide perovskites MAPbBr3 and MAPbI3, as well as the benchmark oxide perovskite SrTiO3. For halide perovskites, the flexophotovoltaic effect is found to be orders of magnitude larger than for SrTiO3, and indeed large enough to induce photovoltages bigger than the band gap. Moreover, we find that in MAPbI3 the flexophotovoltaic effect is additional to a native bulk photovoltaic response that is switchable and ferroelectric-like. The results suggest that strain gradient engineering can be a powerful tool to modify the photovoltaic output even in already well-established photovoltaic materials.
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| GB/T 7714 | Wang, Zhiguo , Shu, Shengwen , Wei, Xiaoyong et al. Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites [J]. | PHYSICAL REVIEW LETTERS , 2024 , 132 (8) . |
| MLA | Wang, Zhiguo et al. "Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites" . | PHYSICAL REVIEW LETTERS 132 . 8 (2024) . |
| APA | Wang, Zhiguo , Shu, Shengwen , Wei, Xiaoyong , Liang, Renhong , Ke, Shanming , Shu, Longlong et al. Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites . | PHYSICAL REVIEW LETTERS , 2024 , 132 (8) . |
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Accurate evaluation for operating state of power transformer using big data and portrait technology is beneficial to ensure the safe and stable operation of power system. Aiming to the shortcomings of traditional condition evaluation methods, such as too single evaluation dimension and strong subjectivity, a construction method for transformer operating state portrait based on multi-dimensional capability and knowledge graph-multilayer perceptron (KG-MLP) is proposed. Firstly, the portrait system of transformer operation state is constructed, which is composed of insulation level, load capacity, anti-short circuit ability, energy efficiency level and voltage regulation capacity. Then, by combining the KG and MLP, a portrait analysis model of transformer operating state is built. Finally, according to the actual operation data of 1368 110kV transformers in a certain area, an example analysis of transformer operation state portrait is carried out. Also, the results are compared with those of Random Forest (RF) and Support Vector Machine (SVM) methods. The results show that the proposed method can accurately construct the transformer running state portrait with an accuracy of 96.35%, which is superior to RF algorithm (accuracy of 89%) and SVM algorithm (accuracy of 77%), providing a new way of evaluation for power transformer operating state. © 2024 Power System Technology Press. All rights reserved.
Keyword ：
Energy efficiency Energy efficiency Knowledge graph Knowledge graph Multilayers Multilayers Power transformers Power transformers Support vector machines Support vector machines Voltage regulators Voltage regulators
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| GB/T 7714 | Shu, Shengwen , Chen, Yangyang , Zhang, Ziqi et al. Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron [J]. | Power System Technology , 2024 , 48 (2) : 750-759 . |
| MLA | Shu, Shengwen et al. "Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron" . | Power System Technology 48 . 2 (2024) : 750-759 . |
| APA | Shu, Shengwen , Chen, Yangyang , Zhang, Ziqi , Fang, Shuqi , Wang, Guobin , Zeng, Jinglan . Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron . | Power System Technology , 2024 , 48 (2) , 750-759 . |
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Donor doping can increase the dielectric constant of a material by several orders of magnitude due to induced space charge causing interfacial polarization. Giant dielectric properties and interface polarization are also both expected to greatly enhance the flexoelectric behavior of a material. In this work, a typical flexoelectric ceramic material, BaTiO3, was selected and donor doped using elemental Nb. Compared with the nominal BaTiO3 ceramic, the dielectric constant and flexoelectric coefficient of the Nb-doped BaTiO3 ceramics were significantly improved. The transverse flexoelectric coefficient of 0.3 mol. % Nb-BaTiO3 was found to increase to nearly 40 times the nominal value, reaching 387 mu C/m. The results indicate that the giant dielectric response, and therefore the giant flexoelectric response, is the result of the combined effects of internal barrier-layer capacitance and surface barrier-layer capacitance. This study not only deepens the understanding of the semiconductor macro-dielectric effect and the flexoelectric mechanism caused by doping, but it also provides a feasible strategy for the design of giant dielectric/flexoelectric response materials and related devices with high dielectric constants and flexoelectric coefficients.
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| GB/T 7714 | Li, Hao , Wu, Hao , Wang, Zhiguo et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics [J]. | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
| MLA | Li, Hao et al. "Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics" . | APPLIED PHYSICS LETTERS 124 . 6 (2024) . |
| APA | Li, Hao , Wu, Hao , Wang, Zhiguo , Xie, Zhengqiu , Shu, Shengwen , Liu, Zhiyong et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics . | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
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The effectiveness of fireproof sealing systems in preventing the spread of fire in high-rise building cable shafts relies on the properties of various sealing materials and the construction process. Therefore, a comprehensive evaluation is necessary. The authors of this paper propose a comparative test method based on an entity test platform for a performance evaluation of cable shaft fireproof sealing systems in high-rise buildings. The test platform measures changes in temperature, humidity, and smoke mass during fire tests to compare the performance of four sets of fireproof sealing systems in terms of thermal insulation, smoke sealing capacity, and overall integrity. In addition, a fire dynamics simulation (FDS) of fireproof sealing systems was carried out on the entity test platform, and the sealing failure process in the case of cracking in the fireproof sealing system was revealed. The simulation results for the temperature trends in the lower space align with the fire test results. Furthermore, as the gap size increases, the diffusion of smoke and flame accelerates. Consequently, the performance of cable shaft fireproof sealing systems depends not only on the sealing material but also on the construction process.
Keyword ：
cable shaft cable shaft entity test platform entity test platform FDS FDS fireproof sealing system fireproof sealing system high-rise building high-rise building performance evaluation performance evaluation
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| GB/T 7714 | Zhang, Bizhen , Shu, Shengwen , Zheng, Zhicong et al. Performance Evaluation of Cable Shaft Fireproof Sealing System in High-Rise Buildings: A Comparative Test Method [J]. | FIRE-SWITZERLAND , 2024 , 7 (3) . |
| MLA | Zhang, Bizhen et al. "Performance Evaluation of Cable Shaft Fireproof Sealing System in High-Rise Buildings: A Comparative Test Method" . | FIRE-SWITZERLAND 7 . 3 (2024) . |
| APA | Zhang, Bizhen , Shu, Shengwen , Zheng, Zhicong , Qu, Bo , Li, Xin , Xiang, Xingyao et al. Performance Evaluation of Cable Shaft Fireproof Sealing System in High-Rise Buildings: A Comparative Test Method . | FIRE-SWITZERLAND , 2024 , 7 (3) . |
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The thermal faults of GIS (Gas Insulated Switchgear) disconnect switch can lead to serious electrical accidents, and the temperature of the contacts is an important indicator for effectively detecting thermal faults. Therefore, conducting temperature field calculations for GIS is of great significance. In this paper, a multi-physics simulation calculation model is established for a 110 kV GIS disconnect switch. Firstly, electromagnetic simulation calculations are carried out to obtain the distribution of losses. Then, the calculated losses are coupled as heat sources to the temperature fluid field to obtain the temperature and flow field distribution. Based on this, temperature field analysis is further carried out for different contact resistance values in abnormal contact conditions. The results show that the temperature hotspots of the GIS disconnect switch are concentrated on the upper contacts of the disconnect switch. In the case of poor contact, the highest temperature point is 42.06% higher than that under normal working conditions. © Beijing Paike Culture Commu. Co., Ltd 2024.
Keyword ：
Electric switchgear Electric switchgear Electromagnetic simulation Electromagnetic simulation Temperature Temperature
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| GB/T 7714 | Zhang, Ziqi , Ruan, Jiangjun , Shu, Shengwen et al. Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies [C] . 2024 : 397-405 . |
| MLA | Zhang, Ziqi et al. "Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies" . (2024) : 397-405 . |
| APA | Zhang, Ziqi , Ruan, Jiangjun , Shu, Shengwen , Chen, Qiaofeng , Zhang, Chen , Deng, Yongqing . Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies . (2024) : 397-405 . |
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Wildfires have become an important factor threatening the safe and stable operation of transmission lines, and large-scale wildfires can significantly reduce the air gap insulation level of transmission lines and cause line tripping. Therefore, based on the principle of cellular automata and Wang Zhengfei's model of wildfire spread, this paper analyzes in detail the effects of factors such as slope, wind speed, wind direction, and fuel type on the speed of wildfire spread and the area of the fire site, and predicts the time when the wildfire arrives below the transmission line. The results indicate that the established model can preliminarily reflect the spread law of wildfires, and has a certain guiding role for the safe and stable operation of the power grid. © Beijing Paike Culture Commu. Co., Ltd 2024.
Keyword ：
Cellular automata Cellular automata Electric lines Electric lines Electric power transmission Electric power transmission Fires Fires Transmissions Transmissions Wind Wind
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| GB/T 7714 | Xu, Jun , Fang, Chaoying , Cao, Shiyun et al. Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines [C] . 2024 : 191-200 . |
| MLA | Xu, Jun et al. "Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines" . (2024) : 191-200 . |
| APA | Xu, Jun , Fang, Chaoying , Cao, Shiyun , Shu, Shengwen . Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines . (2024) : 191-200 . |
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通过压电取能方式将电力设备表面的机械振动能转化为电能，是实现电力专用传感器无源化的有效途径之一。然而，传感器高集成度和小型化发展趋势对压电取能功率提出了更高要求。为此，提出一种基于钐掺杂铌镁酸铅-钛酸铅(Sm-doped Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3,Sm-PMN-PT)材料和改进型双中间电容回收(improved double intermediate capacitor harvesting,improved-DICH)接口电路的压电取能功率提升方法。首先，制备了不同Sm掺杂质量分数为x和PT质量分数为y的x Sm-PMN-y PT压电双晶片，并对压电材料的性能参数进行了测试和对比；其次，在对比分析几种典型接口电路的基础上，设计了一种改进型DICH接口电路，并从理论上进行了取能功率的对比分析；然后，采用Multisim软件对不同接口电路的取能功率进行了仿真分析；最后，对Sm-PMN-PT压电双晶片和锆钛酸铅(Pb(Zr_(1–x)Ti_x)O_3,PZT)压电陶瓷在不同接口电路下的取能功率和能量提取效率进行了对比测试。研究结果表明：基于2.5%Sm-PMN-32%PT材料和改进型DICH接口电路的压电取能装置具有516.3μW的高输出功率、61.1%的高能量提取效率和较强的负载适应性，在取能领域具有良好的工程应用前景。
Keyword ：
Sm掺杂PMN-PT Sm掺杂PMN-PT 功率提升 功率提升 压电取能 压电取能 接口电路 接口电路 电力传感器 电力传感器
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| GB/T 7714 | 舒胜文 , 俞若珺 , 张必震 et al. 基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法 [J]. | 高电压技术 , 2024 , 50 (08) : 3448-3462 . |
| MLA | 舒胜文 et al. "基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法" . | 高电压技术 50 . 08 (2024) : 3448-3462 . |
| APA | 舒胜文 , 俞若珺 , 张必震 , 舒龙龙 , 路永玲 , 王真 . 基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法 . | 高电压技术 , 2024 , 50 (08) , 3448-3462 . |
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利用大数据和画像技术对电力变压器运行状态进行准确评价有利于保障电力系统的安全稳定运行。针对电力变压器运行状态传统评价方法存在的评价维度过于单一、主观性较强等不足，提出了一种基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法。首先，构建了由绝缘水平、负载能力、抗短路能力、能效等级和调压能力五个能力构成的变压器运行状态画像体系；然后，融合知识图谱(knowledge graph,KG)与多层感知机(multilayer perceptron,MLP)，建立了一种变压器运行状态画像分析模型；最后，基于某地区1368台110kV变压器的实际运行数据，开展了变压器运行状态画像的实例分析，并与随机森林(random forest,RF)和支持向量机(supportvectormachine,SVM)方法的画像分析结果进行对比。研究结果表明，所提方法对变压器运行状态画像的准确率达到96.35%，优于RF算法(准确率89%)和SVM算法(准确率77%)，为电力变压器的运行状态评价提供了一种新思路。
Keyword ：
多层感知机 多层感知机 多维能力 多维能力 电力变压器 电力变压器 画像构建 画像构建 知识图谱 知识图谱 运行状态 运行状态
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| GB/T 7714 | 舒胜文 , 陈阳阳 , 张梓奇 et al. 基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法 [J]. | 电网技术 , 2024 , 48 (02) : 750-759 . |
| MLA | 舒胜文 et al. "基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法" . | 电网技术 48 . 02 (2024) : 750-759 . |
| APA | 舒胜文 , 陈阳阳 , 张梓奇 , 方舒绮 , 王国彬 , 曾静岚 . 基于多维能力和知识图谱-多层感知机的变压器运行状态画像构建方法 . | 电网技术 , 2024 , 48 (02) , 750-759 . |
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In recent years, wireless sensor networks have been widely used in monitoring the operational status of power systems and other industrial production activities. The traditional battery power supply method has the disadvantages of high pollution, limited effective power supply lifespan, and the difficulty of replacing batteries. The piezoelectric energy harvesting method, which converts the mechanical vibration energy into electrical energy, has become a current research favorite. In this paper, a self-powered improved double intermediate diodes and capacitors (DIDC) interface circuit is designed. Firstly, theoretical analyses of improved DIDC interface circuit and some common interface circuits are provided. Then, the energy harvesting power and output voltage of different interface circuits in different load resistances are simulated and compared using Multisim software. The results show that the improved DIDC interface circuit has higher output power, output voltage and good load adaptability, which makes it a better prospect for engineering applications. © 2024 IEEE.
Keyword ：
energy harvesting energy harvesting interface circuits interface circuits piezoelectricity piezoelectricity vibration vibration
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| GB/T 7714 | Yu, R. , Shu, S. , Zhang, B. et al. Optimization Study on Piezoelectric Energy Harvesting Interface Circuit [未知]. |
| MLA | Yu, R. et al. "Optimization Study on Piezoelectric Energy Harvesting Interface Circuit" [未知]. |
| APA | Yu, R. , Shu, S. , Zhang, B. , Jin, B. , Lu, Y. , Wang, Z. . Optimization Study on Piezoelectric Energy Harvesting Interface Circuit [未知]. |
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AgNbO3 antiferroelectric (AFE) ceramics have attracted much attention because of their high-energy storage performance and environment-friendly characteristics. In this paper, Sb2O5-doped AgNbO3 ceramics are prepared by the traditional solid-state reaction method, and the effects of phase structure, microstructure, dielectric, and ferroelectric properties are systematically investigated. Lattice shrinkage and obvious grain size change are caused by the introduction of Sb5+ ions. The dielectric constant increases significantly with the introduction of Sb5+ (epsilon(r) from 210 to 550 at room temperature), and the phase transition temperatures of M-1-M-2 and M-2-M-3 shift to a lower temperature as the Sb-doping level increases. High relaxor degree gamma = 1.97 of M-1-M-2 peak is achieved in the AgNb0.98Sb0.02O3 ceramics, showing typical relaxor antiferroelectric characteristics. Simultaneously, the relaxor characteristics lead to lower remanent polarization values, a finer P-E hysteresis loop, and an improved AFE phase in AgNb0.98Sb0.02O3 ceramics. Compared to pure AgNbO3, AgNb0.98Sb0.02O3 ceramics have a higher recoverable energy density (J(rec)= 1.70 J/cm(3)) and higher energy efficiency (eta = 30.05%).
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| GB/T 7714 | Tian, Tingfang , Chen, Feilong , Wen, Zhaokuan et al. Antiferroelectric-ferroelectric crossover induced by composition variation in AgNbO3-based lead-free ceramics [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2023 , 34 (4) . |
| MLA | Tian, Tingfang et al. "Antiferroelectric-ferroelectric crossover induced by composition variation in AgNbO3-based lead-free ceramics" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 34 . 4 (2023) . |
| APA | Tian, Tingfang , Chen, Feilong , Wen, Zhaokuan , Wang, Zhiguo , Hu, Yongming , Shu, Shengwen . Antiferroelectric-ferroelectric crossover induced by composition variation in AgNbO3-based lead-free ceramics . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2023 , 34 (4) . |
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