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A maximum power point tracker for photovoltaic energy systems based on fuzzy neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 263-270页

作者： Chun-hua LI Xin-jian Zhu Guang-yi CAO Wan-qi hu Sheng SUI Ming-ruo hu Fuel Cell Research Institute Shanghai Jiao Tong University Shanghai 200240. China Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China

To extract the maximum power from a photovoltaic （PV） energy system, the real-time maximum power point （MPP） of the PV array must be tracked closely. The non-linear and time-variant characteristics of the PV array and the non-linear and non-minimum phase characteristics of a boost converter make it difficult to track the MPP for traditional control strategies. We propose a fuzzy neural network controller （FNNC）, which combines the reasoning capability of fuzzy logical systems and the learning capability of neural networks, to track the MPP. With a derived learning algorithm, the parameters of the FNNC are updated adaptively. A gradient estimator based on a radial basis function neural network is developed to provide the reference information to the FNNC. Simulation results show that the proposed control algorithm provides much better tracking performance compared with the filzzy logic control algorithm.

关键词： Photovoltaic array Maximum power point tracking (MPPT) Fuzzy neural network controller (FNNC) Radial basis function neural network (RBFNN)

瑞马唑仑诱导睡眠平衡术在慢性失眠中的临床应用效果

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中国新药杂志 2024年第12期33卷 1256-1261页

作者：胡淇云徐森刘雨思李万文韩亮王文元浙江中医药大学杭州310053 锦州医科大学锦州121001 浙江大学附属精神卫生中心杭州310063 浙江省人民医院/杭州医学院附属人民医院杭州310014

目的:评价瑞马唑仑诱导睡眠平衡术在慢性失眠患者中的临床应用效果。方法:选取慢性失眠患者120例,年龄18~65岁,按照随机数字表法将患者分为两组:丙泊酚组(P组)和瑞马唑仑组(R组)。利用麻醉诱导睡眠平衡术对患者进行治疗,观察两组患者的... 详细信息

目的:评价瑞马唑仑诱导睡眠平衡术在慢性失眠患者中的临床应用效果。方法:选取慢性失眠患者120例,年龄18~65岁,按照随机数字表法将患者分为两组:丙泊酚组(P组)和瑞马唑仑组(R组)。利用麻醉诱导睡眠平衡术对患者进行治疗,观察两组患者的睡眠指标(PSqi和ISI量表)、焦虑指标(HAMA量表)及认知功能指标(MMSE和MoCA量表)的变化。检测两组患者治疗前后的血清皮质醇水平,监测治疗过程中血流动力学状态及不良反应,并综合评估两组的临床疗效。结果:两组患者的一般资料及各评估量表的基础值无统计学差异(P>0.05)。两组患者的睡眠指标比治疗前明显改善(P0.05)。R组的焦虑指标比治疗前明显改善(P0.05)。R组治疗后的MMSE及MoCA评分较P组明显提高(P0.05)。治疗过程中R组患者的血流动力学更平稳,不良反应发生率比P组明显减少(P0.05)。结论:瑞马唑仑诱导睡眠平衡术能显著改善慢性失眠患者的睡眠质量、焦虑水平以及认知功能,同时治疗过程安全平稳,不良反应较少。

关键词：瑞马唑仑慢性失眠睡眠平衡术焦虑认知功能

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考虑入水冲击过程的舱段结构优化

Transactions of Nanjing University of Aeronautics and Astronautics 2024年第3期41卷 359-371页

作者：何子懿王晨胡奇董松文张雨沈星张军南京航空航天大学航空学院南京210016 中国特种飞行器研究所荆门448035

水陆两栖飞机的舱段结构在入水过程中需要承受入水冲击力的作用,对水陆两栖飞机的结构性能有着重要影响。本文建立了水陆两栖飞机的初始舱段结构模型,基于该结构通过数值仿真方法获取了结构入水过程中的压强分布。建立了舱段结构的有限... 详细信息

水陆两栖飞机的舱段结构在入水过程中需要承受入水冲击力的作用,对水陆两栖飞机的结构性能有着重要影响。本文建立了水陆两栖飞机的初始舱段结构模型,基于该结构通过数值仿真方法获取了结构入水过程中的压强分布。建立了舱段结构的有限元模型并开展了参数分析,探究了不同设计参数对舱段结构的影响。在此基础上,考虑舱段入水过程中的结构变形与应力分布,搭建了舱段结构优化设计框架;以舱段结构的应力和应变作为约束、减少质量为目标开展优化设计;根据优化后得到的舱段结构,进一步验证了单向耦合分析方法的准确性。优化结果表明,舱段结构的底面加强筋分布以及底面蒙皮厚度对入水过程中结构产生的最大米塞斯应力有着重要影响。通过对舱段结构的设计参数开展优化设计,可以在满足强度与刚度的前提下,显著降低舱段结构的质量。

关键词：舱段结构水陆两栖飞机流固耦合入水冲击结构优化

Pulmonary sarcoidosis:A novel sequelae of drug reaction with eosinophilia and systemic symptoms:A case report

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World Journal of Clinical Cases 2022年第35期10卷 13074-13080页

作者： Yu-qi hu Chen-Yang Lv Ai Cui Department of Pulmonary and Critical Care Medicine Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China Department of Pulmonary and Critical Care Medicine The First Hospital of Fangshan DistrictBeijing 102499China

BACKGROUND Drug reaction with eosinophilia and systemic symptoms(DRESS)syndrome is an uncommon yet serious adverse drug hypersensitivity reaction with the presentations including rash,fever,lymphadenopathy,and internal organ *** is a systematic granulomatous disease with unknown *** herein report a case of pulmonary sarcoidosis secondary to allopurinol-induced *** SUMMARY A 37-year-old man with a history of hyperuricemia was treated with allopurinol for three weeks at a total dose of 7000 milligrams before developing symptoms including anorexia,fever,erythematous rash,and elevated *** patient was diagnosed with DRESS and was treated with prednisone for 6 mo until all the symptoms completely *** months later,the patient presented again because of a progressively worsening dry *** chest computed tomography images showed bilateral lung parenchyma involvement with lymph node enlargement,which was confirmed to be nonnecrotizing granuloma by pathological *** on radiologic and pathological findings,he was diagnosed with sarcoidosis and was restarted on treatment with prednisone,which was continued for another 6 *** of chest imaging revealed complete resolution of parenchymal lung lesions and a significant reduction in the size of the mediastinal and hilar lymph *** a 6-month follow-up of completion of treatment,the patient's clinical condition remained stable with no clinical evidence of *** This is the first case in which pulmonary sarcoidosis developed as a late complication of allopurinol-induced *** case indicated that the autoimmune reaction of DRESS may play an important role in the pathogenesis of sarcoidosis.

关键词： Pulmonary sarcoidosis Drug reaction with eosinophilia and systemic symptoms Autoimmune sequelae Allopurinol Case report

Proteome changes in the plasma of Papilio xuthus (Lepidoptera:Papilionidae):effect of parasitization by the endoparasitic wasp Pteromalus puparum (Hymenoptera:Pteromalidae)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第6期10卷 445-453页

作者： Jia-ying Zhu Gong-yin YE qi FANG Cui hu State Key Laboratory of Rice Biology Institute of Insect Sciences Zhejiang University Hangzhou 310029 China

Although the biochemical dissection of parasitoid-host interactions is becoming well characterized, the molecular knowledge concerning them is minimal. In order to understand the molecular bases of the host immune response to parasitoid attack, we explored the response of Papilio xuthus parasitized by the endoparasitic wasp Pteromalus puparum using proteomic approach. By examining the differential expression of plasma proteins in the parasitized and unparasitized host pupae by two-dimensional (2D) electrophoresis, 16 proteins were found to vary in relation to parasitization compared with unparasitized control samples. All of them were submitted to identification by mass spectrometry coupled with a database search. The modulated proteins were found to fall into the following functional groups: humoral or cellular immunity, detoxification, energy metabolism, and others. This study contributes insights into the molecular mechanism of the relationships between parasitoids and their host insects.

关键词： Proteomics Plasma Parasitism Immune response Pteromaluspuparum Papilio xuthus

A new sesquiterpene from Caragana intermediia

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Chinese Chemical Letters 2007年第11期18卷 1379-1382页

作者： Zhi hua Sun Chang qi hu Jin Yi Wang School of Pharmacy Fudan University Shanghai 200032 China College of Science Northwest A＆F University Yangling 712100 China

A new alloaromadendrane-type sesquiterpene, （-）-alloaromadendrane-3β,9β-diol （1）, has been isolated from the aerial part of Caragana intermediia. The structure of （-）-alloaromadendrane-3β,9β-diol （1） was established by spectroscopic methods, including X-ray analysis that provided its relative stereochemistry. Bioassay showed that （-）-alloaromadendrane-3β,9β-diol （1） possesses anti-pyricularia oryzae P-2b activity with MIC value of 10 μg/m-L.

关键词： Caragana intermediia Leguminosae Sesquitetpene (-)-Alloaromadendrane-3β,9β-diol

Photochemical oxidation of dimethylsulfide in seawater

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Acta Oceanologica Sinica 2007年第5期26卷 34-42页

作者： YANG Guipeng LI Chengxuan qi Jialin hu Lige HOU Haijun Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of China Qingdao 266100 China

Dimethylsulfide （DMS） is generally thought to be lost from the surface oceans by evasion into the atmosphere as well as consumption by microbe. However, photochemical process might be important in the removal of DMS in the oceanic photic zone. A kinetic investigation into the photochemical oxidation of DMS in seawater was performed. The photo-oxidation rates of DMS were influenced by various factors including the medium, dissolved oxygen, photosensitizers, and heavy metal ions. The photo-oxidation rates of DMS were higher in seawater than in distilled water, presumably due to the effect of salinity existing in seawater. Three usual photosensitizers （humic acid, fulvic acid and anthroquinone）, especially in the presence of oxygen, were able to enhance the photo-oxidation rate of DMS, with the fastest rate observed with anthroquinone. Photo-oxidation of DMS followed first order reaction kinetics with the rate constant ranging from 2.5 × 10^-5 to 34.3 × 10^-5. Quantitative analysis showed that approximately 32% of the photochemically removed DMS was converted to dimethylsulfoxide. One of the important findings was that the presence of Hg^2 ＋ could markedly accelerate the photo-oxidation rate of DMS in seawater. The mechanism of mercuric catalysis for DMS photolysis was suggested according to the way of CTTM （ charge transfer to metal） of DMS - Hg^2＋ complex.

关键词： dimethylsulfide photochemistry kinetics metal ion seawater

UV-triggered Polymerization of Polyelectrolyte Composite Coating with Pore Formation and Lubricant Infusion

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Chinese Journal of Polymer Science 2023年第3期41卷 365-372,I0004,I0006页

作者： Jia-qi hu Wei-Pin huang Jing Wang Ke-Feng Ren Jian Ji MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Porous coatings with the features of muti-interfaces and high specific surface area have emerged as an excellent material platform for the manipulation of porous ***-by-layer(Lb L)assembly technique has been widely used in preparing porous polyelectrolyte ***,the efficient construction of stable film from the Lb L technique is still a ***,we reported a new solution to construct a stabilized polyelectrolyte coating with porous *** by the mechanical reinforcement of double-network hydrogel,we constructed the poly(ethylenimine)(PEI)/poly(acrylic acid)(PAA)coating by in situ photopolymerization of acrylic acid in the PEI network instead of assembling PEI and *** with the Lb L films,the in situ polymerized coating kept higher stability after 30 iterations of *** structures could also be constructed after acid treatment,which was utilized to load lubricant to enhance the lubricating property of the *** work provides a new method for the construction of dynamic and stable polyelectrolyte coatings,expediting more development of practical applications.

关键词： Porous coating Polyelectrolyte coating Dip-coating UV-triggered polymerization Stability

CuΣ15晶界结构低能化转变的微观机制研究

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塑性工程学报 2024年第6期31卷 164-170页

作者：薛红涛张志军张其虎汤富领任军强卢学峰李俊琛兰州理工大学材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室甘肃兰州730050

采用分子动力学模拟方法对CuΣ15晶界的结构转变过程进行了系统研究,发现在单轴拉伸作用下CuΣ15[112](512)晶界会向Σ11[112](131)晶界发生低能化结构转变。位错演化和原子运动轨迹分析表明,该结构转变过程主要在两种肖克莱不全位错b_(... 详细信息

采用分子动力学模拟方法对CuΣ15晶界的结构转变过程进行了系统研究,发现在单轴拉伸作用下CuΣ15[112](512)晶界会向Σ11[112](131)晶界发生低能化结构转变。位错演化和原子运动轨迹分析表明,该结构转变过程主要在两种肖克莱不全位错b_(1)=1/6[211]和b_(3)=1/6[121]的共同作用下完成。首先b_(1)位错从与Σ15晶界六边形结构单元的5和6号原子处形核并发射,此后其在{111}面上滑移导致内禀型堆垛层错的形成;b_(3)位错随后在与b_(1)同样位置形核并发射,引起{111}面上原子二次重排,从而导致堆垛层错消失。在上述位错作用下,CuΣ15晶界中原本组成六边形结构单元的5和6号原子脱离晶界区域,沿{111}面进入晶粒内而变为体相原子,剩余4个原子则重新排列形成四边形结构单元;CuΣ15晶界由此逐步完成向Σ11晶界的结构低能化转变。

关键词： 15对称倾斜晶界晶界结构转变晶界弛豫单轴拉伸分子动力学模拟