检索结果-南通市图书馆

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

光伏阵列故障在线诊断技术的研究

科学技术创新 2025年第2期 60-63页

作者：邓云广西职业技术学院大数据学院广西南宁

针对光伏阵列裂纹、热斑、开路、短路等故障,人工巡检方式存在检查效率低、准确率不高的问题,本文提出了光伏组件故障在线检测及诊断方法,通过提取光伏组件故障特征参数,建立故障类型与故障原因映射关系网,并反映在神经网络的结构、连... 详细信息

针对光伏阵列裂纹、热斑、开路、短路等故障,人工巡检方式存在检查效率低、准确率不高的问题,本文提出了光伏组件故障在线检测及诊断方法,通过提取光伏组件故障特征参数,建立故障类型与故障原因映射关系网,并反映在神经网络的结构、连接权值和阈值之中,将故障数据录入到经过训练的神经网络模型中,进而实现光伏组件的故障监测及诊断。本文对提高光伏发电运维效率,以及降低运维成本具有十分重要的意义。

关键词：光伏阵列故障诊断神经网络

汉麻籽多肽靶向抑制胰脂肪酶/胆固醇酯酶的分子作用机制

在线全文

学校读者我要写书评

暂无评论

食品科学 2025年第2期46卷 38-49页

作者：尹浩朱将雄赵海云钟宇王丹凤邓云上海交通大学农业与生物学院上海200240 上海交通大学云南(大理)研究院云南大理671000 云南省大理白族自治州检验检测院云南大理671000

采用酶活动力学、联合抑制、荧光光谱、等温滴定量热法和分子对接等技术系统探究两种多肽(APAM和RLPA)对胰脂肪酶(pancreatic lipase,PL)和胆固醇酯酶(cholesterol esterase,CE)活性调控效果及分子结合机制。结果表明,RLPA对PL和CE具有... 详细信息

采用酶活动力学、联合抑制、荧光光谱、等温滴定量热法和分子对接等技术系统探究两种多肽(APAM和RLPA)对胰脂肪酶(pancreatic lipase,PL)和胆固醇酯酶(cholesterol esterase,CE)活性调控效果及分子结合机制。结果表明,RLPA对PL和CE具有更强的抑制活性,其半抑制浓度分别为(79.62±3.20)μmol/L和(301.27±14.40)μmol/L。抑制动力学分析表明APAM对两种酶的抑制机制为竞争性抑制,而RLPA则为混合性抑制。联合抑制表明APAM和RLPA在低浓度下均可与奥利司他协同抑制PL和CE,但在高浓度下协同作用减弱,甚至出现拮抗现象。荧光光谱结果表明两种多肽可以通过与PL和CE发生结合产生静态猝灭,改变了酶中脂肪族氨基酸的疏水环境。等温滴定量热法证明多肽与酶的结合过程是自发且放热,主要通过氢键和静电相互作用实现。分子对接模拟进一步分析表明氢键、盐桥和阳离子-π相互作用在多肽与酶的结合中起着至关重要的作用。这项研究丰富了对多肽与PL和CE的相互作用机制的认识,为开发基于汉麻籽蛋白的功能性食品提供了科学依据。

关键词：脂质消化酶抑制机制荧光光谱等温滴定量热法分子模拟

A new characterization of Willmore submanifolds

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2011年第4期26卷 453-463页

作者： XU Hong-wei YANG deng-yun Center of Mathematical Sciences Zhejiang University Hangzhou 310027 China.

Let M^n be a compact Willmore submanifold in the unit sphere Sn＋p. In this note, we investigate the first eigenvalue of the SchrSdinger operator L = -△ - q on M, where q is some potential function on M, and present... 详细信息

关键词： Willmore submanifolds Schrodinger operator eigenvalue fiat normal bundle Willmore torus.

Solvothermal Synthesis, Structural Characterization and Properties of Two New Layered Lanthanide Sulfates

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第5期29卷 831-836页

作者： LU yun ZHANG deng XU Yan State Key Laboratory of Materials-oriented Chemical Engineering College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009 P. R. China

Two new layered lanthanide sulfates, [C10H10N2][Pr2（SO4）4（H2O）2]（1） and [H5O2][Sm（SO4）2（H2O）3]（2） were synthesized via solvothermal reaction and structurally characterized by single-crystal X-ray diffraction（XRD）, infrared（IR） spectroscopy, thermal analysis, fluorescent spectra and inductively coupled plasma（ICP）. Crystal data for compound 1, triclinic, Pi space group, a=0.8052（4） nm, b=0.9438（4） nm, c=1.4990（7） nm, α=79.450（5）°, β= 83.703（5）°, γ=74.048（5）°, V=1.0746（9） nm3, Z=2; for compound 2, monoclinie, P21/c space group, a=0.6599（11） nm, b=1.8940（3） nm, c=0.8765（14） nm, β=96.596（2）°, V=1.0883（3） nm3, Z=4. Structure analysis indicates that both the compounds exhibit a 2D corrugated layer structure, with protonated 4,4＇-bipyridine cations and water dimmers （H5O2）＋ located between the inorganic layers of compounds pounds 1 and 2 were further investigated. 1 and 2, respectively. Luminescent properties of com-

关键词： Solvothermal synthesis Open-framework Lanthanide sulfate Layered structure Luminescence

Drying characteristics, functional properties and in vitro digestion of purple potato slices dried by different methods

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

Journal of Integrative Agriculture 2019年第9期18卷 2162-2172页

作者： QIU Gan JIANG Yong-li deng yun Department of Food Science and Technology Shanghai Jiao Tong University

The drying characteristics,physico-chemical and functional properties,as well as starch digestibility,of purple potato slices dried using different methods(such as,vacuum freeze-drying,VFD;hot-air drying,HAD;air-impingement jet drying,AIJD;and far-infrared assisted heat-pump drying,FIHPD)were *** rate was the highest(3.0 g 100 g^-1 min^-1)using AIJD,followed by FIHPD and HAD,and the rate of VFD was the lowest one(0.3 g 100 g^-1 min^-1).Drying data were fitted to 12 thin-layer drying models,with the Midilli model giving the best ***,AIJD showed higher diffusivity(5.5×10^-10 m^2 s^–1)and energy efficiency(55 J g^-1)than any other drying method used in this *** reference to the samples dried by VFD,the starch granules of the samples obtained by HAD,FIHPD,and AIJD exhibited different extent of disruption,which significantly increased their water absorption capacity,swelling power,and in vitro digestibility,but decreased the peak *** sample resulting from AIJD had the greatest water absorption capacity(7.9 g g^-1)and solubility(21.6%),but the smallest syneresis rate(48%).Good correlation coefficients(R^2>0.98)implied that the pseudofirst order kinetic model adequately described the rate and extent of starch digestion of dried potato *** from AIJD and FIHPD showed the highest digestibility percentages,reaching to 72.4 and 72.5%.Based on the drying rate,specific energy consumption,functional properties and digestibility,AIJD appeared to be quite effective and suitable to be transferred on the industry scale.

关键词： purple potato air-impingement jet drying(AIJD) drying characteristics flour properties starch digestibility

Numerical Study on the Stress–Strain Cycle of Thermal Self-Compressing Bonding

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2018年第4期31卷 140-147页

作者： yun-Hua deng Qiao Guan Jun Tao Bing Wu Aeronautical Key Laboratory for Welding and Joining Technologies AVIC Beijing Aeronautical Manufacturing Technology Research Institute School of Mechanical Engineering and Automation Beihang University Science and Technology on Power Beam Process Laboratory AVIC Beijing Aeronautical Manufacturing Technology Research Institute

Thermal self-compressing bonding(TSCB) is a new solid-state bonding method pioneered by the authors. With electron beam as the non-melted heat source, previous experimental study performed on titanium alloys has proved the feasibility of TSCB. However, the thermal stress–strain process during bonding, which is of very important significance in revealing the mechanism of TSCB, was not analysed. In this paper, finite element analysis method is adopted to numerically study the thermal elasto-plastic stress–strain cycle of thermal self-compressing bonding. It is found that due to the localized heating, a non-uniform temperature distribution is formed during bonding, with the highest temperature existed on the bond interface. The expansion of high temperature materials adjacent to the bond interface are restrained by surrounding cool materials and rigid restraints, and thus an internal elasto-plastic stress–strain field is developed by itself which makes the bond interface subjected to thermal compressive action. This thermal self-compressing action combined with the high temperature on the bond interface promotes the atom diffusion across the bond interface to produce solid-state joints. Due to the relatively large plastic deformation, rigid restraint TSCB obtains sound joints in relatively short time compared to diffusion bonding.

关键词： Thermal self-compressing bonding Locally non-melted heating Thermal elasto-plastic stress–strain Atom diffusion Solid-state bonding Finite element analysis

An Adaptive Task Creation Pruning Strategy for Optimizing Irregular Applications

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2015年第3期24卷 535-541页

作者： CAO Qian LI Huiyong ZUO Min deng yun YU Yuan School of Computer and Information Engineering Beijing Technology and Business University School of Electronics Engineering and Computer Science Peking University College of Information Science and Engineering Guilin University of Technology

The Open MP task directive makes it possible to efficiently parallelize irregular applications, with task granularity as one of the most critical issues. To implement Open MP specification on multi-core architecture,a model is presented specializing in the execution of irregular applications. The model captures computation and communication within a node with host cores and accelerator cores. Based on this model, we propose an adaptive task creation pruning strategy including two stages to adjust dynamically task granularity. The first stage is task creation in breadth-first manner until getting to a threshold, which utilizes potential parallelism of multi-core processor. The second stage is starvation-triggered task regeneration once some worker thread becomes starved, which ensures work-stealing and thus achieves load balance. The evaluation is conducted with a series of typical irregular benchmarks, and the results indicate that our approach offers more effective performance in parallel execution of irregular benchmarks.

关键词： Task granularity Adaptive Irregular applications Multi-core

Tetravalent Edge-transitive Cayley Graphs of PGL(2, p)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2013年第4期29卷 837-842页

作者： Xiao-hui HUA Shang-jin XU yun-ping deng College of Mathematics and Information Science Henan Normal University School of Mathematics and Information Science Guangxi University Department of Mathematics Shanghai Jiaotong University

t Let F = Cay（G, S）, R（G） be the right regular representation of G. The graph Г is called normal with respect to G, if R（G） is normal in the full automorphism group Aut（F） of F. Г is called a bi-normal with respect to G if R（G） is not normal in Aut（Г）, but R（G） contains a subgroup of index 2 which is normal in Aut（F）. In this paper, we prove that connected tetravalent edge-transitive Cayley graphs on PGL（2,p） are either normal or bi-normal when p ≠ 11 is a prime.

关键词： Cayley graph normal bi-normal simple group

Farnesoid X receptor regulators from natural products and their biological function

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2023年第3期43卷 618-626页

作者： PENG Wan NI Hengfan GUO Dale deng yun DAI Manyun Institute of Rare Diseases West China HospitalSichuan UniversityChengdu 610065China Department of Pharmacy West China HospitalSichuan UniversityChengdu 610041China School of Pharmacy Chengdu University of Traditional Chinese MedicineState Key Laboratory of Southwestern Chinese Medicine ResourcesChengdu 611137China School of Medicine Ningbo UniversityNingbo 315000China

Metabolic syndrome(Met S)has been a growing public health concern worldwide without specific *** summarizing the chemical structure type and effect mechanisms of natural products targeted on farnesoid X receptor(FXR),to provide the research basis for exploring the treatment of Met *** following databases were searched for natural products which targeting FXR:Pub Med,Embase,the Cochrane Library,Web of Science,China National Knowledge Infrastructure Database,Wanfang Database,China Science and Technology Journal Database,and Chinese Biomedical Literature *** 120 natural products were summarized,including terpenoids(51 compounds),steroidal saponins(27 compounds),phenylpropanolds(19 compounds),flavonoids(13 compounds),alkaloids(3 compounds)and others(7 compounds),most researches focus on terpenoids and part of synthetic FXR regulators were based on the structure of *** regulators could improve cholestasis and liver injury,hyperlipidemia,diabetes and *** is a potential target of treating Met *** products are characteristics with unique novel structures and special biological activity,and they are important sources of bioactive precursor compounds and drug *** the effects and mechanism of natural products and its derivative on Met S by targeting FXR may be a new way to develop the new drugs of treating Met S.

关键词： farnesoid X receptor metabolic syndrome biological products molecular docking simulation biological activity