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Multiple Lagrange stability and Lyapunov asymptotical stability of delayed fractional-order Cohen-Grossberg neural networks
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作者 黄玉娇 袁孝焰 +2 位作者 杨旭华 龙海霞 肖杰 《中国物理B:英文版》 SCIE EI CAS CSCD 2020年第2期196-205,共10页
This paper addresses the coexistence and local stability of multiple equilibrium points for fractional-order Cohen-Grossberg neural networks(FOCGNNs)with time delays.Based on Brouwer's fixed point theorem,sufficie... This paper addresses the coexistence and local stability of multiple equilibrium points for fractional-order Cohen-Grossberg neural networks(FOCGNNs)with time delays.Based on Brouwer's fixed point theorem,sufficient conditions are established to ensure the existence of Πi=1^n(2Ki+1)equilibrium points for FOCGNNs.Through the use of Hardy inequality,fractional Halanay inequality,and Lyapunov theory,some criteria are established to ensure the local Lagrange stability and the local Lyapunov asymptotical stability of Πi=1^n(Ki+1)equilibrium points for FOCGNNs.The obtained results encompass those of integer-order Hopfield neural networks with or without delay as special cases.The activation functions are nonlinear and nonmonotonic.There could be many corner points in this general class of activation functions.The structure of activation functions makes FOCGNNs could have a lot of stable equilibrium points.Coexistence of multiple stable equilibrium points is necessary when neural networks come to pattern recognition and associative memories.Finally,two numerical examples are provided to illustrate the effectiveness of the obtained results. 展开更多
关键词 fractional-order Cohen-Grossberg neural networks multiple Lagrange stability multiple Lyapunov asymptotical stability time delays
Genotype by Environment Interaction for Grain Yield and Association among Stability Parameters in Bread Wheat (<i>Triticum aestivum</i>L.) 预览
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作者 Alemayehu Balcha 《美国植物学期刊(英文)》 2020年第1期1-10,共10页
Bread wheat (Triticum aestivum L.) is most important cereal crop in Ethiopia. Lack of genotypes with wide stability across environments has been one of the most important constraints of wheat production in the country... Bread wheat (Triticum aestivum L.) is most important cereal crop in Ethiopia. Lack of genotypes with wide stability across environments has been one of the most important constraints of wheat production in the country. Field experiments were conducted in Halaba and Bule, South Ethiopia, in 2016 and 2017, in order to estimate grain yield stability and association among stability parameters. Fifteen improved bread wheat genotypes were grown under randomized complete block design with three replications. Mean yield for Halaba 2016, Halaba 2017, Bule 2016 and Bule 2017 was 3.83, 1.89, 2.90 and 3.59 tons/ha, respectively. Genotypes Lemu (3.25 tons/ha) and Mandoyu (3.18 tons/ha) had high mean yield, and low values of environmental variance (S2i), coefficient of variation (CVi), stability variance (δ2i), ecovalence (Wi) and deviation from regression (S2di). Genotypes Biqa (3.69 tons/ha) and Shorima (3.66 tons/ha) had high mean yield, coefficient of regression (bi) and coefficient of determination (R2i ≥ 0.94) as well as low values of δ2i, Wi and S2di. Grain yield had positive rank correlation with bi (r = 0.75, p 2i (r = 0.70, p δ2i, Wi and S2di was high (r ≥ 0.98, p , Mandoyu and Hidase, and Biqa and Shorima would be recommended for wide adaption, and for more favorable environments, respectively. It could also be suggested that one of Wi, δ2i, S2di and rank sum would be used for ranking of genotypes. 展开更多
关键词 Grain Yield Stability Rank Correlations Bread Wheat TRITICUM AESTIVUM
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Mean square stability for Markov jump Boolean networks
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作者 Liqing WANG Mei FANG Zheng-Guang WU 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2020年第1期186-195,共10页
In this paper, one of the stability definitions of Markov jump Boolean networks(MJBNs), called mean square stability(MSS), is investigated. Some necessary and sufficient conditions are presented to guarantee the MSS o... In this paper, one of the stability definitions of Markov jump Boolean networks(MJBNs), called mean square stability(MSS), is investigated. Some necessary and sufficient conditions are presented to guarantee the MSS of such MJBNs. Moreover, one of the necessary and sufficient conditions for MSS is obtained in terms of linear programming, which implies that MSS is equivalent to global stability with probability 1 for MJBNs. Furthermore, the construction of Lyapunov function is given and also another theorem based on the Lyapunov function is derived to ensure the MSS of MJBNs. Finally, a numerical example is provided to illustrate the profits of our results. 展开更多
关键词 mean square STABILITY MSS BOOLEAN network BN stochastic STABILITY Markovian JUMP parameters semi-tensor product STP Lyapunov function
A Class of Semi-Implicit Parallel Difference Method for Time Fractional Diffusion Equations 预览
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作者 Lifei Wu Jiake Sun Xiaozhong Yang 《应用数学与应用物理(英文)》 2020年第1期158-171,共14页
In this paper, we construct a class of semi-implicit difference method for time fractional diffusion equations—the group explicit (GE) difference scheme, which is a difference scheme with good parallelism constructed... In this paper, we construct a class of semi-implicit difference method for time fractional diffusion equations—the group explicit (GE) difference scheme, which is a difference scheme with good parallelism constructed using Saul’yev asymmetric scheme. The stability and convergence of the GE scheme of time fractional diffusion equation are analyzed by mathematical induction. Then, the theoretical analysis is verified by numerical experiments, which shows that the GE scheme is effective for solving the time fractional diffusion equation. 展开更多
关键词 Time FRACTIONAL Diffusion Equation Group EXPLICIT Scheme Stability PARALLEL COMPUTATION Numerical Experiment
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LEM-DEM coupling for slope stability analysis
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作者 XU WenJie WANG Shi BILAL Manzoor 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2020年第2期329-340,共12页
Slope stability analysis is a keen area of interest to researchers of geotechnical engineering and geological hazards. To date, the most popular approach applied in slope engineering design is the limit equilibrium me... Slope stability analysis is a keen area of interest to researchers of geotechnical engineering and geological hazards. To date, the most popular approach applied in slope engineering design is the limit equilibrium method(LEM). However, for this method,some assumptions are required when obtaining the sliding force and the resistance force on the slide face. The discrete element method(DEM) presents an advantage in the calculation of the interaction forces between adjacent blocks without assumptions.This paper introduces a new slope stability analysis based on coupling of both approaches, herein referred to as LEM-DEM. The main LEM-DEM procedure is to transform the slice model of a slope in LEM into the DEM model and obtain the sliding force and the resistance force to calculate the factor of stability(Fos). The sensitivity analysis of the parameters in DEM, such as normal and shear stiffness, was conducted to illustrate that LEM-DEM suggests higher contact stiffness. A comparison between the Fos values in DEM and LEM-DEM was also conducted to indicate the rationality and advantages of LEM-DEM, especially for a gentle slope with a changing shear force direction in the slice model where the interslice forces in LEM are unreasonable.Furthermore, this study carried out a 3 D landslide stability analysis extension, along with the results, for the proposed method. 展开更多
关键词 limit equilibrium method(LEM) discrete element method(DEM) slope stability factor of stability(Fos) COUPLING
提高变频器驱动型提升机运行稳定性的策略研究 预览
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作者 闫珂 《机械管理开发》 2020年第3期58-60,共3页
基于常规控制方式下提升机稳定域相对较小的问题,提出了一种以权重前馈为基础的提升机控制方案,并搭建了实验系统,通过实验验证了该种控制方案时可行性。实验结果表明,应用该方案可以确保提升机在弱电网背景下的运行稳定域得到不断扩大... 基于常规控制方式下提升机稳定域相对较小的问题,提出了一种以权重前馈为基础的提升机控制方案,并搭建了实验系统,通过实验验证了该种控制方案时可行性。实验结果表明,应用该方案可以确保提升机在弱电网背景下的运行稳定域得到不断扩大,确保变频器驱动型提升机具备较强的稳定性。 展开更多
关键词 提升机 稳定性 稳定域 滤波器 控制方案
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基于线性多步法的波形松弛方法的线性稳定性
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作者 范振成 《数值计算与计算机应用》 2020年第1期58-67,共10页
波形松弛(WR)方法的研究成果丰富,但主要集中于收敛性,罕见关于稳定性的研究.研究基于线性多步法的WR方法的线性稳定性,获得了线性稳定的几个充分条件,给出了一些具体的线性稳定WR方法的例子,并提供了一些支持理论结果的数值算例.
关键词 稳定 线性稳定 波形松弛方法 线性多步法
FLAC与极限平衡法联合分析高陡矿山边坡稳定性的应用研究 预览
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作者 柏树丰 《价值工程》 2020年第3期188-190,共3页
基于极限平衡法、强度折减法和重度增加等方法,结合岩土工程中现有边坡计算和分析方法的特点,研究了强度折减法和极限平衡法的基本原理和适用条件。对于某矿山300m高陡边坡,采用基于强度折减FLAC数值模拟方法和极限平衡法,分析两种不同... 基于极限平衡法、强度折减法和重度增加等方法,结合岩土工程中现有边坡计算和分析方法的特点,研究了强度折减法和极限平衡法的基本原理和适用条件。对于某矿山300m高陡边坡,采用基于强度折减FLAC数值模拟方法和极限平衡法,分析两种不同开挖方案下矿山高陡边坡的稳定性,确定相应的边坡稳定系数和最危险截面,为选择合理的开挖方案提供依据。根据研究结果,通过FLAC数值模拟与极限平衡法得出的稳定安全系数,二者计算结果相近、最危险滑动面也类似;但是FLAC数值模拟可更精确、有效地模拟边坡的塑性破坏和塑性流动,并可得到边坡滑动体的形状和位置。 展开更多
关键词 高陡矿山边坡 极限平衡法 有限差分法 稳定性
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二合一洗发香波悬浮稳定性能研究 预览
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作者 梅杰 周丹贤 +1 位作者 巫俊峰 邓攀攀 《广东化工》 CAS 2020年第4期51-53,共3页
选取了二硬脂基邻苯二甲酰胺(DX-STAB-2)、丙烯酸/丙烯酸甲酯共聚物(DX-SF-1)、黄原胶(NovaXan 200T)、硅石(Aerosil 200)四种悬浮剂,考察了四种悬浮剂对二合一洗发香波悬浮稳定性、泡沫力、梳理性能的影响。实验结果表明,二合一洗发香... 选取了二硬脂基邻苯二甲酰胺(DX-STAB-2)、丙烯酸/丙烯酸甲酯共聚物(DX-SF-1)、黄原胶(NovaXan 200T)、硅石(Aerosil 200)四种悬浮剂,考察了四种悬浮剂对二合一洗发香波悬浮稳定性、泡沫力、梳理性能的影响。实验结果表明,二合一洗发香波中四种悬浮剂的悬浮稳定性能排序为:DX-STAB-2>Aerosil200>DX-SF-1>NovaXan 200T>空白对照;泡沫力排序为:NovaXan 200T>DX-SF-1>DX-STAB-2>空白对照>Aerosil 200;梳理性排序为:DX-STAB-2>NovaXan 200T=空白对照>Aerosil 200>DX-SF-1。综合悬浮稳定性、泡沫力以及梳理性结果,DX-STAB-2的悬浮稳定性及梳理性均最优,泡沫力优于空白对照。二合一洗发香波中建议采用1%的DX-STAB-2作为悬浮稳定剂。 展开更多
关键词 洗发香波 悬浮 稳定性
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浅水波方程的一类改进的格子Boltzmann模型 预览
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作者 陈文文 张文欢 +1 位作者 汪一航 朱俏俐 《宁波大学学报:理工版》 CAS 2020年第1期72-79,共8页
提出了一种改进的格子Boltzmann模型来模拟浅水流动.新模型通过在演化方程中添加修正项,一个可调参数被引入到黏性系数与无量纲松弛时间的关系中,从而使得无量纲松弛时间的值在黏性系数固定时是可调的.为了验证模型的精确性与稳定性,对... 提出了一种改进的格子Boltzmann模型来模拟浅水流动.新模型通过在演化方程中添加修正项,一个可调参数被引入到黏性系数与无量纲松弛时间的关系中,从而使得无量纲松弛时间的值在黏性系数固定时是可调的.为了验证模型的精确性与稳定性,对圆柱绕流、流量驱动无外力浅水流进行了模拟.数值结果表明,相较于以往模型,新提出模型在提高精度的同时,计算效率和稳定性也得到了改善. 展开更多
关键词 格子BOLTZMANN方法 浅水波方程 无量纲松弛时间 稳定性 边界条件
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一类具有饱和发生率的虫媒传染病模型研究
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作者 张晋珠 梁娟 苏铁熊 《西南大学学报:自然科学版》 CAS CSCD 北大核心 2020年第3期88-93,共6页
考虑虫媒传染病具有潜伏期的特征,研究了一类具有饱和发生率的时滞传染病模型的动力学行为,确定了疾病是否流行的阈值R 0.当R 0<1时,无病平衡点全局渐近稳定,疾病将最终灭绝;当R 0>1时,唯一地方病平衡点条件稳定,系统会产生Hopf分支.
关键词 虫媒传染病模型 饱和发生率 时滞 稳定性 HOPF分支
Salt/current-triggered stabilization of β-cyclodextrins encapsulated host-guest low-molecular-weight gels
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作者 Huan Xu Chaoyu Zhou +5 位作者 Chuanjiang Jian Sunhai Yang Miaochang Liu Xiaobo Huang Wenxia Gao Huayue Wu 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第2期369-372,共4页
Host-guest supramolecular gels were developed via the self-assembly of inclusion complexes(ICs) ofβ-cyclodextrins/phenylboronic acid gelator(PBA).Salts and current were involved in the self-assembly to stabilize the ... Host-guest supramolecular gels were developed via the self-assembly of inclusion complexes(ICs) ofβ-cyclodextrins/phenylboronic acid gelator(PBA).Salts and current were involved in the self-assembly to stabilize the host-guest gels.The stability of the gels was greatly improved after salts were added.The stable time of gels was extended from 2.5 h to 120 h with the addition of NH_4 NO_3 at the concentration of 2.5×10^(-2) g/mL.The morphology of the gel was affected by the concentrations of NH_4NO_3.SEM images revealed that the gels were three-dimensional nanofibrous networks,the sizes of fibers decreased with decreasing NH_4NO_3 concentrations,which affected the stability of gels,further proved by the rheological properties of gels.More stable gels were obtained with current stimulation,the stable time of the gel was increased from 2.5 h to 55 h with current by adding NaBF_4.The current also exhibited significant influence on the aggregation as the voltage varied(0-500 mV) with a constant concentration of salts.The result showed the self-assembly process of host-guest gel could be well controlled via the addition of salts and current to desired morphology and stability. 展开更多
关键词 Supramolecular gel Inclusion complex Host-guest interaction Salt Current Stability
Performance and yield stability of maize hybrids in stress-prone environments in eastern Africa 预览
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作者 Wender Santos Rezende Yoseph Beyene +11 位作者 Stephen Mugo Eric Ndou Manje Gowda Julius Pyton Sserumaga Godfrey Asea Ismail Ngolinda McDonald Jumbo Sylvester O.Oikeh Michael Olsen Aluízio Borém Cosme Damiao Cruz Boddupalli M.Prasanna 《作物学报:英文版》 CAS CSCD 2020年第1期107-118,共12页
Identification and deployment of high-yielding and stress-tolerant maize hybrids adapted to stress-prone agro-ecologies is important for improving the food security and livelihoods of smallholder farmers in eastern Af... Identification and deployment of high-yielding and stress-tolerant maize hybrids adapted to stress-prone agro-ecologies is important for improving the food security and livelihoods of smallholder farmers in eastern Africa.The objectives of this study were to(i)assess the performance of maize hybrids under well-watered and drought stress conditions;(ii)evaluate grain yield stability of 65 intermediate-maturing and 55 early-maturing hybrids in 24 well-watered locations and seven drought stress locations;and(iii)identify representative and/or discriminative testing locations for increasing genetic gains for the target traits.There were significant differences for grain yield among early-and intermediatematuring hybrids tested under well-watered and drought stress environments.Among the early-maturing hybrids,the top 10 hybrids produced 46.8%–73.9%and 31.2%–42.1%higher mean grain yields than the best commercial check under drought and well-watered conditions,respectively.Among the intermediate-maturing hybrids,the top 10 hybrids produced 25.2%–47.7%and 8.5%–13.5%higher grain yield than commercial checks under drought stress and well-watered conditions,respectively,suggesting improvement in the levels of drought tolerance in both early-and intermediate-maturing hybrids.GGE biplot analysis and a bi-segmented regression linear method identified specific early-maturing and intermediate-maturing hybrids that performed well under both well-watered and drought stress conditions.These hybrids could be recommended for commercial production in eastern Africa.Kakamega in Kenya was found to be the most representative and highly discriminating site among well-watered testing locations,while Kabuku in Tanzania was the least representative of test locations.For testing under drought stress conditions,Kiboko in Kenya was identified as the most representative location.This information could be useful for allocating resources and streamlining CIMMYT maize hybrid testing in eastern Africa. 展开更多
关键词 DROUGHT STRESS Eastern AFRICA GENOTYPE by environment interaction Yield stability ZEA mays L.
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复合固定化脂肪酶催化餐厨废弃油脂合成生物柴油
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作者 杨建斌 《精细与专用化学品》 CAS 2020年第2期5-9,共5页
探讨了复合固定化脂肪酶(Rhizopus oryzae lipase和Candida rugosa lipase)催化餐厨废弃油脂合成生物柴油的工艺条件。实验结果表明,单独使用1,3位专一性脂肪酶R.oryzae lipase催化餐厨废弃油脂,反应18h,生物柴油转化率达到70%;单独使... 探讨了复合固定化脂肪酶(Rhizopus oryzae lipase和Candida rugosa lipase)催化餐厨废弃油脂合成生物柴油的工艺条件。实验结果表明,单独使用1,3位专一性脂肪酶R.oryzae lipase催化餐厨废弃油脂,反应18h,生物柴油转化率达到70%;单独使用非专一性脂肪酶C.rugosa lipase,反应30h,生物柴油转化率可达20%。为了更有效提高生物柴油转化率,采用1,3位专一性脂肪酶R.oryzae lipase和非专一性脂肪酶C.rugosa lipase复合固定化脂肪酶催化合成生物柴油,反应21h,生物柴油转化率可达到96.5%。同时对该复合酶的稳定性进行了实验,在连续催化反应10个批次(300h)后,生物柴油转化率仍保持在80%以上。 展开更多
关键词 生物柴油 餐厨废弃油脂 复合脂肪酶 固定化 稳定性
土钉支护结构设计参数对路堑边坡稳定性的影响 预览
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作者 吴华伟 尉立基 章海明 《北方交通》 2020年第3期68-72,共5页
在以往的土钉支护结构分析研究中,通常分析土钉支护结构设计参数对边坡稳定性的影响,而没有分析各个设计参数对路堑边坡稳定性的影响程度。针对某路堑边坡开挖项目,分析土钉支护结构设计参数—土钉布设倾角、密度、长度对边坡稳定性的... 在以往的土钉支护结构分析研究中,通常分析土钉支护结构设计参数对边坡稳定性的影响,而没有分析各个设计参数对路堑边坡稳定性的影响程度。针对某路堑边坡开挖项目,分析土钉支护结构设计参数—土钉布设倾角、密度、长度对边坡稳定性的影响程度。研究结果表明:随着土体中所布设的土钉长度的逐渐加长,土钉所受拉应力呈二次抛物线变化,土钉长度从5.5m至11.5m,安全系数提高了48%;土钉的布设倾角从5°至20°,在倾角值为10°时土钉所受拉应力达到峰值,安全系数随倾角的增加,呈线性增长,增长率约为17%;随着土钉布设数量从2根至5根,土钉所受拉应力最大,线性减少,路堑边坡土体安全系数提高了13.5%。也得土钉对土体稳定性的影响最大、倾角次之、密度最后。 展开更多
关键词 土钉支护 路堑边坡 稳定性 有限元
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方形自升式平台稳性计算 预览
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作者 薛江山 苏立强 向小斌 《船舶标准化工程师》 2020年第2期44-47,56,共5页
以上海中远船务工程有限公司研发的一型正方形自升式生产平台为依托,依照美国船级社MODU规范的要求,分析了平台的完整稳性、破损稳性和剩余稳性,总结了该类平台稳性分析的方法及过程.对方形自升式平台稳性计算具有一定的参考意义.
关键词 方形自升式平台 稳性 风倾力矩 船级社规范
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含虚拟惯性控制的直流微电网稳定性分析
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作者 朱晓荣 孟凡奇 《电网技术》 EI CSCD 北大核心 2020年第1期208-216,共9页
为分析不同类型虚拟惯性控制对直流微电网产生的影响,首先建立了各电源与负载侧换流器的小信号模型,并分析了电网与蓄电池侧换流器在应用不同虚拟惯性控制时,其换流器端口的动态响应特性以及阻抗特性。其次,考虑到多换流器交互引起的稳... 为分析不同类型虚拟惯性控制对直流微电网产生的影响,首先建立了各电源与负载侧换流器的小信号模型,并分析了电网与蓄电池侧换流器在应用不同虚拟惯性控制时,其换流器端口的动态响应特性以及阻抗特性。其次,考虑到多换流器交互引起的稳定性问题,建立直流微电网的等效阻抗模型,根据阻抗匹配准则,分析了在不同控制模式下控制器与系统参数变化对系统稳定性的影响规律。根据稳定性以及动态特性分析可得出,在蓄电池侧换流器应用虚拟发电机型惯性控制可以使系统获得更好的动态特性与稳定边界。最后在Matlab时域仿真与RT-LAB实时仿真平台上分别建立了直流微电网仿真模型,并对相关理论分析进行了验证。 展开更多
关键词 直流微电网 虚拟惯性控制 小信号模型 稳定性
磁通耦合神经元模型的稳定性及Hopf分岔分析 预览
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作者 于欢欢 安新磊 +1 位作者 路正玉 王文静 《吉林大学学报:理学版》 CAS 北大核心 2020年第2期388-396,共9页
通过磁通耦合的方法将两个磁通神经元耦合,建立耦合神经元模型。首先,利用Routh-Hurwitz判据分析平衡点的稳定性,并计算该模型的唯一平衡点;其次,由Hopf分岔定理得到分岔解析解,并研究模型的分岔方向及分岔周期解的稳定性;最后,通过数... 通过磁通耦合的方法将两个磁通神经元耦合,建立耦合神经元模型。首先,利用Routh-Hurwitz判据分析平衡点的稳定性,并计算该模型的唯一平衡点;其次,由Hopf分岔定理得到分岔解析解,并研究模型的分岔方向及分岔周期解的稳定性;最后,通过数值仿真模拟模型的动力学行为。结果表明,在一定参数范围内,随着耦合强度的增加,模型产生亚临界Hopf分岔,同时出现倒倍周期、加周期分岔现象和较多的周期窗口,且增加外界刺激电流可诱导尖峰放电。 展开更多
关键词 耦合神经元 HOPF分岔 放电行为 稳定性
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利用高度稳定的发光薄膜提高多晶硅太阳能电池的光伏效率
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作者 王元 Paula Gawiyszewska-Wilczynsk +3 位作者 张秀荣 尹健 温永清 李焕荣 《中国科学:材料科学(英文版)》 CSCD 2020年第4期544-551,共8页
硅基太阳能电池已经主导了整个光伏市场,但是仍然面临着光电转化效率低的问题,其中部分原因是其对紫外线的利用率较低.稀土铕配合物能够将紫外光转化为可见光,有望提高硅基太阳能电池的光电转化效率.然而,这类配合物较低的稳定性限制了... 硅基太阳能电池已经主导了整个光伏市场,但是仍然面临着光电转化效率低的问题,其中部分原因是其对紫外线的利用率较低.稀土铕配合物能够将紫外光转化为可见光,有望提高硅基太阳能电池的光电转化效率.然而,这类配合物较低的稳定性限制了它们的实际应用.本文中,我们制备了一种高度稳定的EVA/Eu(ND)4-CTAC发光薄膜,将其覆盖在大尺寸的多晶硅太阳能电池表面(110 cm^2)可以使得光电转化效率从15.06%提高到15.57%.在500 h的加速老化实验中荧光性能几乎没有下降,证明了发光薄膜的超强稳定性.在如此大的有效面积上,发光薄膜使硅基太阳能电池的转换效率提高0.51%的绝对值,同时实现超高的稳定性,说明该发光膜在光伏工业上具有广阔的应用前景. 展开更多
关键词 光电转化效率 硅基太阳能电池 转换效率 多晶硅太阳能电池 光伏效率 加速老化实验 光伏市场 紫外线
特高压直流输电工程GIL三支柱绝缘子故障分析及改进措施
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作者 王井飞 张强 +2 位作者 李祥斌 黄大彬 张任驰 《高压电器》 CAS CSCD 北大核心 2020年第1期246-252,共7页
随着特高压直流输电工程建设日益深入,气体绝缘金属封闭输电线路(GIL)以占地面积小、环境兼容性好、输送容量大、能承载高电压及大电流等优点被广泛应用于特高压直流输电系统,其运行稳定性研究被提上日程。为了分析GIL运行过程中三支柱... 随着特高压直流输电工程建设日益深入,气体绝缘金属封闭输电线路(GIL)以占地面积小、环境兼容性好、输送容量大、能承载高电压及大电流等优点被广泛应用于特高压直流输电系统,其运行稳定性研究被提上日程。为了分析GIL运行过程中三支柱绝缘子故障原因,研究三支柱绝缘子运行特性,通过GIL超声波局部放电分析、解体检查、固定三支柱绝缘子受力分析及固定三支柱绝缘子生产工艺分析,明确GIL三支柱绝缘子内部制造缺陷为故障原因。分析认为,通过对GIL固定三支柱装配优化、绝缘支柱生产过程优化及固定三支柱连板优化等措施,改进后三支柱绝缘子应用于生产现场可有效降低GIL设备故障率,提高GIL运行稳定性,对特高压直流输电工程的可靠运行有着重要意义。 展开更多
关键词 GIL 特高压 稳定性 三支柱绝缘子 局部放电
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