检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

地中电偶极源极低频电磁场的分布与传播特征

地球物理学报 2024年第4期67卷 1527-1545页

作者：王桥唐新功胡文宝应急管理部国家自然灾害防治研究院北京100085 油气资源与勘探技术教育部重点实验室(长江大学) 武汉430100 中国地震局地球物理研究所北京100081 北京白家疃地球科学国家野外科学观测研究站北京100095

利用层状大地中偶极源响应的正演算法,计算地中电偶极源激发的极低频地震电磁场并分析其在地球环境下的传播特征.设计了多个水平层状地球模型,分别模拟和展示了深埋地中的电偶极源的响应和空间分布特征.重点分析了含地壳波导+LAI波导模... 详细信息

利用层状大地中偶极源响应的正演算法,计算地中电偶极源激发的极低频地震电磁场并分析其在地球环境下的传播特征.设计了多个水平层状地球模型,分别模拟和展示了深埋地中的电偶极源的响应和空间分布特征.重点分析了含地壳波导+LAI波导模型的高阻大地中,倾斜电偶极源激励响应随观测点的偏移距和垂直位置、激励源深度、地壳波导结构和参数变化时各场量响应的幅频特征.研究表明,用倾斜电偶极源模拟和分析高阻大地中孕震电磁辐射的响应及在大地电磁系统中的传播特性是可行的;模拟的高阻大地中的电磁辐射在地壳波导和LAI波导中均表现有慢衰减或幅值增强特性,但两个波导效应具有不同的频率选择性;高阻大地中的电磁辐射在波导的高阻介质中具有幅值强、衰减慢的特点.建议在高阻地层出露的地表、井中或海底的高阻岩层中以及大气层中布设测站.

关键词：层状模型地中电偶极源极低频电磁场传播特征岩石圈波导 LAI波导

基于最优Copula相关性分析的短期风速预测方法

在线全文

学校读者我要写书评

暂无评论

电网与清洁能源 2024年第2期40卷 63-72页

作者：郭顺宁马雪杨帆胡文保李嘉宇国网青海省电力公司青海西宁810008 国网青海省电力公司经济技术研究院(国网青海省电力公司清洁能源发展研究院) 青海西宁810008 清华大学电机工程与应用电子技术系北京100084

准确剖析变量间的关联关系,深入挖掘数据的潜在价值,是提升一系列基于统计分析原理所构建风速预测模型精度的关键。为最大程度保留数据的潜在价值并剔除冗余信息,首先将待选输入变量用概率密度函数拟合,其次建立风速与其他变量间的最优C... 详细信息

准确剖析变量间的关联关系,深入挖掘数据的潜在价值,是提升一系列基于统计分析原理所构建风速预测模型精度的关键。为最大程度保留数据的潜在价值并剔除冗余信息,首先将待选输入变量用概率密度函数拟合,其次建立风速与其他变量间的最优Copula函数,再次基于最优Copula函数求解相关系数,明确影响风速预测精度的关键输入变量,最后基于长短期记忆网络模型输出预测结果。基于我国某地区的实测数据集对所提方法进行了验证。实验结果表明,所提出的方法可有效选取关键输入变量,在减少模型训练时间的同时提升预测精度。

关键词：风速预测输入变量选择相关性分析 Copula函数

基于混合算法的初级能源因子和碳排放因子计算策略

在线全文

学校读者我要写书评

暂无评论

能源与环保 2024年第7期46卷 223-229页

作者：胡文保王康李楠郑颖王炜国网青海省电力公司清洁能源发展研究院青海西宁810008 国网青海省电力公司经济技术研究院青海西宁810008 清华四川能源互联网研究院四川成都610042

随着能源领域供给侧结构性改革不断深化,新能源得以发展,但我国仍以煤炭等化石燃料作为主要能源。为了探究碳达峰能源目标背景下能源消费结构对碳达峰的影响,提出了一种基于过程/输入—输出混合算法的初级能源因子(Primary Energy Facto... 详细信息

随着能源领域供给侧结构性改革不断深化,新能源得以发展,但我国仍以煤炭等化石燃料作为主要能源。为了探究碳达峰能源目标背景下能源消费结构对碳达峰的影响,提出了一种基于过程/输入—输出混合算法的初级能源因子(Primary Energy Factor,PEF)和碳排放因子(Carbon Emission Factor,CEF)计算策略。使用3种方法进行计算,研究传递能量转化为一次能源的效率,使用初级能源因子,研究能量传递时发生的所有直接和间接的能源使用和损失,以避免传统算法分析中存在的能源重复计算的问题。探讨能源消费碳排放驱动因素,以期为区域碳排放和经济协调发展决策提供借鉴。

关键词：初级能源因子碳排放因子能量传递能源消费

基于系统动力学模型的光伏发电装机容量推演分析方法

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

智慧电力 2024年第7期52卷 88-95页

作者：徐波伍声宇冯君淑陈梓翰胡文保马文静国网能源研究院有限公司北京102209 国网金华供电公司浙江金华321001 国网青海经济技术研究院青海西宁810008

针对政策、市场、技术等不同因素对光伏发电装机容量增长的影响,提出基于系统动力学模型的光伏发电装机容量推演分析方法。首先,计及电力系统消纳能力对光伏发电装机容量的影响,建立光伏发电装机容量推演分析模型;然后,利用系统动力学... 详细信息

针对政策、市场、技术等不同因素对光伏发电装机容量增长的影响,提出基于系统动力学模型的光伏发电装机容量推演分析方法。首先,计及电力系统消纳能力对光伏发电装机容量的影响,建立光伏发电装机容量推演分析模型;然后,利用系统动力学刻画关键影响因素的因果反馈关系,建立了系统动力学因果回路图;最后,给出系统动力学模块的建模方法。算例分析表明,所提模型能够定量分析不同因素对光伏发电装机容量的动态调控作用,准确反映未来光伏发电装机容量发展趋势。

关键词：光伏发电装机容量系统动力学消纳能力推演分析

Induction of diabetes in cynomolgus monkey with one shot of analytical grade streptozotocin

在线全文

学校读者我要写书评

暂无评论

Animal Models and Experimental Medicine 2020年第1期3卷 79-86页

作者： Zhengzhao Liu Ying Lu wenbao hu Hidetaka Hara Yifan Dai Zhiming Cai Lisha Mou Shenzhen Xenotransplantation Medical Engineering Research and Development Center Institute of Translational MedicineShenzhen Second People's HospitalThe First Affiliated Hospital of Shenzhen UniversityHealth Science CenterShenzhenChina Movement System Injury and Repair Research Center Xiangya Hospital of Central South UniversityChangshaChina Jiangsu Key Laboratory of Xenotransplantation Nanjing Medical UniversityNanjingChina Xenotransplantation Program/Department of Surgery The University of Alabama at BirminghamBirminghamALUSA

Backgrounds:Streptozotocin(STZ)-induced diabetic monkey is a wide used preclinical animal model for the investigation of diabetes such as islet transplantation and development of diabetic *** are serious side effects of this method,including nausea,emesis,weight loss,liver damage,renal failure,and metabolic *** order to reduce the side effects,diabetic monkeys were induced using clinicalgrade ***,clinical-grade STZ is not available in ***,we establised a method by using 100 mg/kg analytical-grade STZ to induce complete diabetes in cynomolgus monkey without generating adverse effects to liver and ***:Three cynomolgus monkeys were used in this study.100 mg/kg STZ dissolved in normal saline and infused through vein line in 5 minutes after indwelling catheter in the carotid artery and jugular *** the STZ administration,blood glucose levels were examined every 1 or 2 hours in the first 48 ***,blood glucose levels were examined twice per day during the first week after the STZ *** and C-peptide levels were measured by *** chemistry of hepatic and renal function tests were *** and glucagon expression in the islet of diabetic monkey and normal monkey were examined by immunohistochemistry ***:The stimulated C-peptide level(Intravenous glucose tolerance test)which is less than 0.5 ng/mL,the triphasic blood glucose response and the destroyed β cell suggested the complete induction of diabetes *** apparent adverse effects were observed including no signs of vomiting and toxicity after STZ ***:In summary,we established a safe and reproducible STZ-induced diabetic cynomolgus monkey model for islet transplantation which will be used to develop novel approaches for the treatment of diabetes.

关键词： analytical grade diabetic model nonhuman primate STZ

R-matrix for the 8-Dimensional Spin Representation of Uq(so7)

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第2期40卷 485-497页

作者： Hong Mei hu Nai Hong hu School of Mathematical Sciences Suzhou University of Science and TechnologySuzhou 215009P.R.China School of Mathematical Sciences MOE Key Laboratory of Mathematics and Engineering Applications&Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241P.R.China

The purpose of the paper is to describe the solution to the quantum Yang-Baxter equation associated with the 8-dimensional spin representation Tsp of Uq(so7).The self-duality of Tsp and the symmetry of the corresponding braiding matrix are ***,the minimal polynomial of the braiding R-matrix of Tsp is presented explicitly in an ingenious method by taking advantage of nice features of the spin representation Tsp.

关键词： Braiding R-matrix spin module minimal polynomial

Mapping out the reaction network of humin formation at the initial stage of fructose dehydration in water

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第6期9卷 1016-1026页

作者： Xing Fu Yexin hu Ping hu hui Li Shuguang Xu Liangfang Zhu Changwei hu Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengduSichuan610064China State Key Laboratory of Southwestern Chinese Medicine Resources Innovative Institute of Chinese Medicine and PharmacyChengdu University of Traditional Chinese MedicineChengduSichuan611137China

The formation of humins hampers the large-scale production of 5-hydroxymethylfurfural(HMF)in ***,a detailed reaction network of humin formation at the initial stage of fructose-to-HMF dehydration in water is delineated by combined experimental,spectroscopic,and theoretical *** bimolecular reaction pathways to build up soluble humins are *** is,the intermolecular etherification of β-furanose at room temperature initiates the C12 path,whereas the C-C cleavage of a-furanose at 130-150℃ leads to C11 path,and that of open-chain fructose at 180℃ to C11' *** successive intramolecular dehydrations and condensations of the as-formed bimolecular intermediates lead to three types of soluble *** show that the C12 path could be restrained by using HCl or AlCl_(3) catalyst,and both the C12 and C110 paths could be effectively inhibited by adding THF as a co-solvent or accelerating heating rate via microwave heating.

关键词： Carbohydrates 5-hydroxymethylfurfural Reaction network Soluble humins Tautomer

Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： XIAO Wei hu DeAn hu GuoLiang XIAO Yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

Multi-Axis Attention With Convolution Parallel Block for Organoid Segmentation

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1295-1297页

作者： Pengwei hu Xun Deng Feng Tan Lun hu Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of SciencesUrumqi 830011 University of Chinese Academy of Sciences Beijing 100049 Xinjiang Laboratory of Minority Speech and Language Information Processing Urumqi 830011China Merck KGaA Darmstadt 64293Germany

Dear Editor,This letter presents an organoid segmentation model based on multi-axis attention with convolution parallel *** adeptly captures dynamic dependencies within bright-field microscopy images,improving global ... 详细信息

关键词： letter convolution organo