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光伏组件晶体硅电池片应力分析

太阳能学报 2015年第6期36卷 1493-1498页

作者：黎之奇湖南大学土木工程学院长沙410082

基于最小势能原理导出光伏组件晶体硅电池片位移场及应力场的级数解,并对面板尺寸为1580 mm×808 mm的195W单晶硅标准组件在风荷载作用下晶体硅电池片的应力进行计算和分析,考虑不同风压及EVA胶膜的厚度和剪切模量变化时对应力的影响。... 详细信息

基于最小势能原理导出光伏组件晶体硅电池片位移场及应力场的级数解,并对面板尺寸为1580 mm×808 mm的195W单晶硅标准组件在风荷载作用下晶体硅电池片的应力进行计算和分析,考虑不同风压及EVA胶膜的厚度和剪切模量变化时对应力的影响。结果表明:最大应力发生在电池片的中点,电池片的应力随EVA胶膜剪切模量的增加而呈非线性增大,随EVA胶膜厚度的增加而呈非线性减小。

关键词：光伏组件晶体硅电池位移场应力场

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晶体硅太阳电池应力的理论分析

湖南大学学报（自然科学版） 2020年第9期47卷 137-143页

作者：黎之奇湖南大学土木工程学院湖南长沙410082

光伏组件的电池层为一离散分布的不连续夹层.针对组件中晶体硅电池片的受力特点导出了电池片的应力场和位移场,并对面板尺寸为1580 mm×808 mm的单晶硅标准组件在风荷载作用下晶体硅电池片的应力进行了计算和分析,考虑了风压及EVA胶膜... 详细信息

光伏组件的电池层为一离散分布的不连续夹层.针对组件中晶体硅电池片的受力特点导出了电池片的应力场和位移场,并对面板尺寸为1580 mm×808 mm的单晶硅标准组件在风荷载作用下晶体硅电池片的应力进行了计算和分析,考虑了风压及EVA胶膜的剪切模量变化对应力的影响.计算结果与有限元结果进行了比较,并对比了125 mm×125 mm和156 mm×156 mm两种规格电池片的应力.结果表明,理论结果与有限元结果符合很好,应力最大值出现在电池片的中点并随着EVA胶膜剪切模量的增加呈非线性增大;增大电池片的尺寸将引起应力的显著增加.

关键词：光伏组件晶体硅电池应力场位移场

Spatial-temporal dynamics of desert vegetation and its responses to climatic variations over the last three decades:a case study of Hexi region in Northwest China

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Journal of Arid Land 2016年第4期8卷 556-568页

作者： YANG Xuemei liU Shizeng YANG Taibao XU Xianying KANG Caizhou TANG Jinnian WEI Huaidong Mihretab G GHEBREZGABHER li zhiqi State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating Gansu Desert Control Research Institute Institute of Glaciology and Ecogeography College of Earth and Environmental SciencesLanzhou University Eritrea Institute of Technology College of Education Wuwei Natural Protection Station the Management Bureau of Gansu Qilianshan National Nature Reserve

Analysis of spatial-temporal variations of desert vegetation under the background of climate changes can provide references for ecological restoration in arid and semi-arid areas. In this study, we used the Global Inventory Modeling and Mapping Studies （GIMMS） NDVI data from 1982 to 2006 and Moderate Resolution Imaging Spectroradiometer （MODIS） NDVI data from 2000 to 2013 to reveal the dynamics of desert vegetation in Hexi region of Northwest China over the past three decades. We also used the annual temperature and precipitation data acquired from the Chinese meteorological stations to analyze the response of desert vegetation to climatic variations. The average value of NDVImax （the maximum NDVI during the growing season） for desert vegetation in Hexi region increased at the rate of 0.65x10-3/a （P〈0.05） from 1982 to 2013, and the significant increases of NDVImax mainly appeared in the typical desert vegetation areas. Vegetation was significantly improved in the lower reaches of Shule and Shiyang river basins, and the weighted mean center of desert vegetation mainly shifted toward the lower reaches of the two basins. Almost 95.32% of the total desert vegetation area showed positive correlation between NDVImax and annual precipitation, indicating that precipitation is the key factor for desert vegetation growth in the entire study area. Moreover, the areas with non-significant positive correlation between NDVImax and annual precipitation mainly located in the lower reaches of Shiyang and Shule river basins, this may be due to human activities. Only 7.64% of the desert vegetation showed significant positive correlation between NDVImax and annual precipitation in the Shule River Basin （an extremely arid area）, indicating that precipitation is not the most important factor for vegetation growth in this basin, and further studies are needed to investigate the mechanism for this phenomenon.

关键词： desert vegetation NDVI global warming spatial-temporal variations Hexi region

The interaction between polyphyllin I and SQLE protein induces hepatotoxicity through SREBP-2/HMGCR/SQLE/LSS pathway

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Journal of Pharmaceutical Analysis 2023年第1期13卷 39-54页

作者： zhiqi li Qiqi Fan Meilin Chen Ying Dong Farong li Mingshuang Wang Yulin Gu Simin Guo Xianwen Ye Jiarui Wu Shengyun Dai Ruichao lin Chongjun Zhao Beijing Key Laboratory for Quality Evaluation of Chinese Materia Medica School of Chinese Materia MedicaBeijing University of Chinese MedicineBeijing100029China Key Laboratory of Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of ChinaShaanxi Normal UniversityXi'an710119China National Institutes for Food and Drug Control Beijing102629China

Polyphyllin I(PPI)and polyphyllin II(PII)are the main active substances in the Paris ***,liver toxicity of these compounds has impeded their clinical application and the potential hepatotoxicity mechanisms remain to be *** this work,we found that PPI and PII exposure could induce significant hepatotoxicity in human liver cell line L-02 and zebrafish in a dose-dependent *** results of the proteomic analysis in L-02 cells and transcriptome in zebrafish indicated that the hepatotoxicity of PPI and PII was associated with the cholesterol biosynthetic pathway disorders,which were alleviated by the cholesterol biosynthesis inhibitor ***,3-hydroxy-3-methy-lglutaryl CoA reductase(HMGCR)and squalene epoxidase(SQLE),the two rate-limiting enzymes in the cholesterol synthesis,selected as the potential targets,were confirmed by the molecular docking,the overexpression,and knockdown of HMGCR or SQLE with ***,the pull-down and surface plasmon resonance technology revealed that PPI could directly bind with SQLE but not with ***,these data demonstrated that PPI-induced hepatotoxicity resulted from the direct binding with SQLE protein and impaired the sterol-regulatory element binding protein 2/HMGCR/SQLE/lanosterol synthase pathways,thus disturbing the cholesterol biosynthesis *** findings of this research can contribute to a better understanding of the key role of SQLE as a potential target in drug-induced hepatotoxicity and provide a therapeutic strategy for the prevention of drug toxic effects with similar structures in the future.

关键词： Polyphyllin I Polyphyllin II Zebrafish Hepatotoxicity SQLE

Enhancing Performance of Perovskite Solar Cells by Developing Novel Carbon Nanomaterials

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Enhancing Performance of Perovskite Solar Cells by Developin...

Multi-stage power source and grid coordination planning method considering grid uniformity

第七届新型太阳能电池材料科学与技术学术研讨会

作者： zhiqi li Wenbin Guo State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University

One-and two-dimensional carbon nano-materials have attracted considerable attention due to the merits of extraordinary chemical,thermal,and electrical *** small dimension and unique morphologies have led to a range of important potential applications in perovskite solar cells(PSCs)..(1) one-dimensional(1 D) carbon nanorods(CNRs):a 1 D N-doped CNRs is developed by a stibonium(Sb) auxiliary ball milling method,and intentionally introduced into the PCBM to accelerate electron transfer in inverted *** presence of Sb-CNRs network can form numerous hetero-junction discontinuous bands,and electrons directly transport from PCBM to electrode through CNRs rather than a zigzag pathway.(2) alkali ionic material functionalized carbon nanodots(CNDs):By introducing tailor-made potassium cation(K+) functionalized carbon nanodots(CNDs@K) into the perovskite precursor solution,we succeeded in defects passivation and crystallization control of the perovskite *** large nanodots anions could effectively suppress the interstitial occupancy of alkali ***,CNDs@K could also increase the grain size as well as the crystallinity of perovskite films.(3) the hydrophobic passivation CNDs layers:the hydrophobic passivation layers are realized for PSCs by exploiting electrostatic self–assembly of trichloro(3,3,3–trifluoropropyl)silane(CHClFSi) and *** simple self–assembly structure changes the wettability of CDs films,which dramatically enhances stability of PSCs without further encapsulation.

关键词： Carbon nano-materials Perovskite solar cells Carbon nanorods Carbon nanodots stability

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Global Energy Interconnection 2020年第4期3卷 303-312,I0001页

作者： zhiqi li Xueshan Han Ming Yang Yiran Ma School of Electrical Engineering Shandong UniversityNO.17923 Jingshi RoadJinan 250061P.R.China

Given the increasing uncertainties in power supply and load,this paper proposes the concept of power source and grid coordination uniformity *** this approach,the standard deviation of the transmission line load rate is considered as the uniformity evaluation index for power source and grid planning.A multi-stage and multi-objective optimization model of the power source and grid expansion planning is established to minimize the comprehensive cost of the entire planning *** this study,the improved particle swarm optimization algorithm and genetic algorithm are combined to solve the model,thus improving the efficiency and accuracy of the *** analysis of a simple IEEE Garver’s 6-node system shows that the model and solution method are effective and ***,they are suitable for the coordinated planning of the power source and grid under a diversified nature of power supply and load.

关键词： Power source and grid coordination Grid uniformity Grid expansion planning Evaluation index of uniformity

Plant Community Diversity in Dongtian Forest Park,Meizhou City,South China

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Agricultural Biotechnology 2023年第2期12卷 11-16页

作者： Qihe YANG zhiqi li Hesheng YANG lihui MO Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas Meizhou 514015China The Hakka Research Institute of Jiaying University Meizhou 514015China

Dongtian Park is a forest park in Dongtian Lake Ecological Tourism Resort in Meizhou City,South *** investigation and analysis of sample methods of the forest community structure and plant diversity in this park,the results showed that there were 181 plant species,belonging to 138 genera in 76 families,including 48 trees,60 shrubs,36 herbs and 37 *** flora is a subtropical evergreen broad-leaved forest with some distinct tropical properties,and evergreen trees accounted for 48.62%of total plant *** dominant species in the tree layer were Schima superba,Pinus massoniana,Cinnamomum parthenoxylon,etc.,and those in the shrub layer were Bambusa textilis,Aidia cochinchinensis,Rhaphiolepis indica,etc.,and in herb layer were Carex baccans,Adiantum flabellulatum,Cibotium barometz,etc.,and the lianas mainly included Smilax hypoglauca,Callerya dielsiana,Trachelospermum jasminoides,*** were few adults of dominant species in the tree layer,*** and *** also lacked seedlings,they would still maintain their dominant position for a quite long period,but Cyclobalanopsis neglecta had sufficient seedling reserves and would be most likely to become a dominant species in *** community had relatively rich species,many ferns and lianas and complex *** evenness,Shannon-Wiener diversity,Pielou uniformity and Simpson index were higher in the shrub layer than in the tree and herb layer,and the Simpson index was the lowest(0.9280)in the herb layer and Shannon-Wiener diversity index was the highest(7.5853)in the liana layer.

关键词： Dongtian Park Forest Community Diversity Flora Meizhou

Evaluation of the shear stability of aerobic granular sludge from a pilot-scale membrane bioreactor:Establishment of a quantitative method

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Journal of Environmental Sciences 2025年第2期148卷 579-590页

作者： Biao Yang Bingduo Wang liying Bin Weirui Chen Xinyi Chen Ping li Shanglong Wen Shaosong Huang zhiqi Zhang Bing Tang School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China Guangdong Guangshen Environmental Protection Technology Co. Ltd.Guangzhou 510663China Guangdong Yuehai Water Investment Co. Ltd.Shenzhen 518000China

This work established a quantitative method to access the shear stability of aerobic granular sludge(AGS)and validated its feasibility by using the mature AGS from a pilot-scale(50 tons/day)membrane bioreactor(MBR)for treating real municipal *** results showed that the changing rate( S)of the peak area(S)of granule size distribution(GSD)exhibited an exponential relationship(R^(2)≥0.76)with the shear time(y=a−b·cx),which was a suitable indicative index to reflect the shear stability of different AGS *** limiting granule size(LGS)was defined and proposed to characterize the equilibrium size for AGS after being sheared for a period of time,whose value in terms of Dv50 showed high correlation(R^(2)=0.92)with the parameter *** free Ca^(2+)(28.44-34.21 mg/L)in the influent specifically interacted with polysaccharides(PS)in the granule’s extracellular polymeric substance(EPS)as a nucleation site,thereby inducing the formation of Ca precipitation to enhance its Young’s modulus,while Ca2+primarily interacted with PS in soluble metabolic product(SMP)during the initial granulation ***,the Young’s modulus significantly affected the parameter a related to shear stability(R^(2)=0.99).Since the parameter a was more closely related(R^(2)=1.00)to S than that of the parameter b or c,the excellent correlation(R^(2)=0.99)between the parameter a and the wet density further verified the feasibility of this method.

关键词： Shear stability Quantitative evaluation Aerobic granular sludge Membrane bioreactor Pilot-scale study Municipal wastewater

Maize Prolonged Prophase 1 is essential for meiotic progression in pollen mother cells

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Crop Journal 2025年第1期13卷 170-180页

作者： Pan, lingling li, Yunfei An, Xueli Xin, zhiqi Dong, Zhaobin Jin, Weiwei Huang, Wei State Key Laboratory of Maize Bio-breeding National Maize Improvement Center Frontiers Science Center for Molecular Design Breeding Department of Plant Genetics and Breeding China Agricultural University Beijing 100193 China National Engineering Laboratory of Crop Stress Resistance Breeding School of Life Sciences Anhui Agricultural University Anhui Hefei 230036 China Research Institute of Biology and Agriculture University of Science and Technology Beijing Beijing 100083 China Tianjin Key Laboratory of Intelligent Breeding of Major Crops Fresh Corn Research Center of BTH Tianjin Agricultural University Tianjin 300384 China

Meiosis, a critical process for sexual reproduction, requires precise regulation to ensure the correct progression of meiotic stages. In yeast and animals, errors in meiotic recombination and homologous chromosomes synapsis bring a surveillance mechanism named pachytene checkpoint to prevent pachytene exit. However, most plant mutants with defects in meiotic prophase I continue cell cycle progression, which hindered the characterization of factors controlling the prophase I to metaphase I transition. Here, we characterized a male-sterile mutant in maize, prolonged prophase1 (pp1), which exhibited pachytene and diakinesis arrest in male meiosis, and abnormal chromatin condensation. Using map-based cloning, the PP1 gene was isolated as a PHD family transcription factor, and its transcripts of PP1 were preferentially accumulated in tapetum and male germline cells during microsporogenesis. Transcriptomic analysis of the pp1 mutant revealed downregulation of genes associated with chromatin assembly, cell cycle, and male meiosis, correlating with observed meiotic arrest and chromatin condensation defects. These findings highlight the role of PP1 in maize microsporogenesis, and providing more insights into the mechanisms regulating the meiotic progression in maize. © 2024

关键词： Maize Male sterile Meiosis PHD-finger protein