检索结果-南通市图书馆

Security-constrained line loss minimization in distribution systems with high penetration of renewable energy using UPFC

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 876-886页

作者： pengcheng song Zheng XU Huanfeng DONG Hui CAI Zhenjian XIE Department of Electrical Engineering Zhejiang UniversityHangzhouChina State Grid Jiangsu Economic Research Institute NanjingChina

Focused on the challenges raised by the largescale integration of renewable energy resources and the urgent goal of energy saving,a novel control scheme for the unified power flow controller(UPFC)series converter is proposed to achieve line loss reduction and security enhancement in distribution systems with a high penetration of renewable ***,the line loss minimum conditions of a general distribution system with loop configurations are ***,security constraints including the permissible voltage range,the line loading limits and the UPFC ratings are *** security enhancement with the least increase in line loss is tackled by solving a much reduced optimal power flow(OPF)*** computational task of the OPF problem is reduced by deducing the security-constrained line loss minimum conditions and removing the equality ***,a hybrid control scheme is *** loss minimization is achieved through a dynamic controller,while an OPF calculator is integrated to generate corrective action for the dynamic controller when the security constraints are *** validity of the proposed control strategies is verified in a modified IEEE 33 bus test system.

关键词： Line loss minimization Security enhancement Unified power flow controller(UPFC) Renewable energy

Analysis of Deep Ritz Methods for Semilinear Elliptic Equations

在线全文

学校读者我要写书评

暂无评论

Numerical Mathematics(Theory,Methods and Applications) 2024年第1期17卷 181-209页

作者： Mo Chen Yuling Jiao Xiliang Lu pengcheng song Fengru Wang Jerry Zhijian Yang School of Mathematics and Statistics Wuhan University299 Ba Yi RoadWuhan 430072P.R.China Hubei Key Laboratory of Computational Science Wuhan University299 Ba Yi RoadWuhan 430072P.R.China

In this paper,we propose a method for solving semilinear elliptical equa-tions using a ResNet with ReLU2 ***,we present a comprehensive formulation based on the penalized variational form of the elliptical *** then apply the Deep Ritz Method,which works for a wide range of *** obtain an upper bound on the errors between the acquired solutions and the true solutions in terms of the depth D,width W of the ReLU2 ResNet,and the num-ber of training samples *** simulation results demonstrate that our method can effectively overcome the curse of dimensionality and validate the theoretical results.

关键词： Semilinear elliptic equations Deep Ritz method ReLUMo ResNet convergence rate

Ar plasma jet treatment delay sprouting and maintains quality of potato tubers(Solanum tuberosum L.)by enhancing antioxidant capacity

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

Food Bioscience 2023年第1期51卷 455-463页

作者： Xiaonan Yang Jiutao An Xiangyou Wang Liang Wang pengcheng song Jie Huang School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo255000China College of Resources and Environment Engineering Shandong University of TechnologyZibo250049China

A plasma jet containing a dielectric barrier structure was used to treat potato eyes at 1.8 slm for different treatment times to inhibit the sprouting of *** changes in the potato germination rate and related indices during the 16-day storage period after treatment were *** effects of the plasma treatment on weight loss rate,reducing sugar content,and surface microstructure of potatoes were also *** results showed that the germination rates of potatoes in the 20 s and 40 s treatments were significantly lower than that in the control ***,scanning electron microscopy showed that the plasma damage to the potato gradually deepened as treatment time was increased,and the plasma treatment caused irreversible damage when the treatment time was 40 *** 20 s treatment significantly increased superoxide dismutase and catalase activities and inhibited the accumulation of reactive oxygen species(ROS)in potatoes,compared to the other *** 20 s treatment improved the content of total phenolic flavonoids to enhance the antioxidant capacity of the potato tubers and maintain their ***,the plasma jet treatment improved the ROS scavenging ability of potatoes and effectively inhibited potato sprouting during storage.

关键词： Potato Plasma jet Sprout suppression SEM ROS

The Effective Surface Metallization of Hollow Glass Microspheres for Flexible Electromagnetic Shielding Film

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 Wuhan University of Technology(Materials Science) 2022年第5期37卷 779-786页

作者： BU Fan song pengcheng LIU Yahui WANG Jun WU Xiyuan LIU Lei XU Chuanhua ZHAGN Jianfeng College of Mechanics and Materials Hohai UniversityNanjing 21l100China Sinosteel Maanshan New Material Technology Co. LtdMaanshan 243000China

The surface of hollow glass microspheres (HGMs) was roughened by a HCl+NH_(4)F strategy,which achieved a broken ratio as 16.10%,and then metallized by electroless plating by Co nanoparticles up to 90 wt% (abbreviated as Co-HGMs).The average grain size of Co was measured to range from 0.4 to 0.5 μ*** Co-HGMs were mixed with liquid silicone rubber and xylene,and cured on a perspex plate applicable for flexible electromagnetic *** attentive parameter optimization,a film about 0.836 mm in thickness was obtained with a density of 0.729 g/cm^(3),showing a shielding effectiveness of 15.2 dB in the X-band (8.2-12.4 GHz) at room temperature,which was ascribed to the formation of a conductive network of Co-HGMs inside the ***,the tensile strength of 0.89 MPa at an elongation ratio of 194.5% was also obtained,showing good mechanical properties and tensile strength.

关键词： hollow glass microspheres(HGMs) electroless plating electromagnetic shielding film flexible film lightweight materials

Stochastic Augmented-Based Dual-Teaching for Semi-Supervised Medical Image Segmentation

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 543-560页

作者： Hengyang Liu Yang Yuan pengcheng Ren Chengyun song Fen Luo School of Computer Science and Engineering Chongqing University of TechnologyChongqing400054China College of Artificial Intelligence Chongqing Technology and Business UniversityChongqing400067China

Existing semi-supervisedmedical image segmentation algorithms use copy-paste data augmentation to correct the labeled-unlabeled data distribution ***,current copy-paste methods have three limitations:(1)training the model solely with copy-paste mixed pictures from labeled and unlabeled input loses a lot of labeled information;(2)low-quality pseudo-labels can cause confirmation bias in pseudo-supervised learning on unlabeled data;(3)the segmentation performance in low-contrast and local regions is less than *** design a Stochastic Augmentation-Based Dual-Teaching Auxiliary Training Strategy(SADT),which enhances feature diversity and learns high-quality features to overcome these *** be more precise,SADT trains the Student Network by using pseudo-label-based training from Teacher Network 1 and supervised learning with labeled data,which prevents the loss of rare labeled *** introduce a bi-directional copy-pastemask with progressive high-entropy filtering to reduce data distribution disparities and mitigate confirmation bias in *** the mixed images,Deep-Shallow Spatial Contrastive Learning(DSSCL)is proposed in the feature spaces of Teacher Network 2 and the Student Network to improve the segmentation capabilities in low-contrast and local *** this procedure,the features retrieved by the Student Network are subjected to a random feature perturbation *** two openly available datasets,extensive trials show that our proposed SADT performs much better than the state-ofthe-art semi-supervised medical segmentation *** only 10%of the labeled data for training,SADT was able to acquire a Dice score of 90.10%on the ACDC(Automatic Cardiac Diagnosis Challenge)dataset.

关键词： Semi-supervised medical image segmentation contrastive learning stochastic augmented

宋鹏程运用“三步二位五法”理筋手法治疗项痹病经验

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

河南中医 2024年第4期44卷 521-524页

作者：王海雄宋鹏程吴玉龙甘肃中医药大学附属医院甘肃兰州730099

宋鹏程主任医师认为,项痹病的病因有:正虚禀赋不足、外邪入侵、年老肝肾亏虚、劳逸不当、饮食不节、跌仆外伤。以上病因在不同情况下可相互转化引起经络痹阻不通,发为项痹病。宋老师在宋贵杰教授所创立的“拔伸旋扳”正骨手法基础上,结... 详细信息

宋鹏程主任医师认为,项痹病的病因有:正虚禀赋不足、外邪入侵、年老肝肾亏虚、劳逸不当、饮食不节、跌仆外伤。以上病因在不同情况下可相互转化引起经络痹阻不通,发为项痹病。宋老师在宋贵杰教授所创立的“拔伸旋扳”正骨手法基础上,结合当代颈椎病发病的特点和专家临床经验总结出“三步二位五法”理筋手法,以“三步二位五法”理筋手法为主,配合敦煌消痹贴外敷和颈椎康复功能锻炼治疗项痹病疗效显著。

关键词：项痹病 “三步二位五法” 理筋手法敦煌消痹贴颈椎康复功能锻炼宋鹏程

Self-developed Pneumatic Spraying Scrubber for Recovering NO_x from Metallurgical Exhaust

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2019年第6期36卷 521-526页

作者： SUN Hongrui DUAN Guangjie ASIF Hussain XUE Fei WANG Jun LI Dengxin song pengcheng College of Environmental Science and Engineering Donghua UniversityShanghai 201620China Shanghai Society for Environmental Science Shanghai 200001China

NOx is generally composed of NO,NO2,N2O,N2O4,and N2O5,which may form photochemical smoke and may lead to acid rain,greenhouse effect and destruction of the ozone layer in the *** this paper,a new pneumatic spraying scrubber was developed for recovering NOx from metallurgical *** this device,NOx was converted into nitric acid,which was then recycled in the oxidization *** with conventional pneumatic spraying scrubbers,the self-developed pneumatic spraying scrubber had significant advantages,such as the simple structure without liquid circulation pump,easy operation,energy conservation,and the high recovery *** influences of various parameters,such as the spray tube height,the spray nozzle diameter,the concentration and temperature of the absorbent,and the operating pressure,on the recovery of NOx were also *** best NOx removal efficiency was 76.08%.When the spray tube height was 0.74 m,the nozzle diameter was 0.5 mm,the absorbent content was 5%at 30℃,and the operating pressure was 0.15-0.17 *** invented pneumatic spraying scrubber successfully solves the problems of high-concentration NOx absorption and regeneration of nitric *** addition,the device can also absorb other harmful gases and provide a possible new treatment process for air pollution control.

关键词： absorption NO x pneumatic spray scrubber flue gases equipment

适用于新型UPFC拓扑的电力系统潮流计算方法

在线全文

学校读者我要写书评

暂无评论

电网技术 2017年第3期41卷 888-894页

作者：杨健宋鹏程徐政浙江大学电气工程学院浙江省杭州市310027

统一潮流控制器(unified power flow controller,UPFC)可以灵活控制和调节电力系统运行状态,具有广泛的应用前景。然而,现有含UPFC的电力系统潮流计算方法大多是针对UPFC串联侧和并联侧接于同一母线的结构,而UPFC并联侧与串联侧接于不... 详细信息

统一潮流控制器(unified power flow controller,UPFC)可以灵活控制和调节电力系统运行状态,具有广泛的应用前景。然而,现有含UPFC的电力系统潮流计算方法大多是针对UPFC串联侧和并联侧接于同一母线的结构,而UPFC并联侧与串联侧接于不同母线时的潮流计算方法还有待深入研究。推导了上述两种情况下UPFC对交流网络的节点注入功率及其偏导,并提出了可在已有潮流计算程序中实现的、适用于新型UPFC拓扑的电力系统潮流计算方法。最后,通过PSS/E算例验证了所提方法的正确性和在实际系统中的适用性。

关键词：统一潮流控制器新型拓扑潮流计算 PSS/E

Effects of Cs Doping on Structural and UV-photochromic Properties of Sodalite

在线全文

学校读者我要写书评

暂无评论

Journal of the Chinese Ceramic Society 2016年第3期3卷 111-119页

作者： HU Xiaoqiang PENG Tongjiang SUN Hongjuan XIE Ruishi XIAN Haiyang song pengcheng School of Materials Science and Engineering Southwest University of Science and Technology Institute of Mineral Materials and Application Southwest University of Science and Technology Analytical and Testing Center Southwest University of Science and Technology Mianyang Environmental Monitoring Central station

The NaAlO_2,Na_2SiO_3-9H_2O,NaOH and CsOH·H_2O were used as raw materials to synthesize Cs-doped sodahte samples by a chemical synthetic *** effects of different Cs doping contents on structural and UV-photochromic properties of sodalite were *** results suggested that the maximum doping content of Cs in sodalite was about 2.9%,and the impure phase CsAlSiO_4·H_2O arose exceeding the doping *** lattice parameters(a and v) of sodalite decreased integrally due to the effect of hydrated Cs ions on sodalite ***,the surface morphology of Cs-doped sodalite consisted of petal shaped aggregated particles at the maximum Cs doping content,which was basically similar as pristine *** addition,the ultraviolet(UV) absorptance of the Cs-doped sodalite,compared with pure sodalite,increased about 1.3%-2.3%from 225 to 280 nm and about 1.8%-2.8%from 280 to 350 nm,respectively.

关键词： sodalite Cs doping structure UV-photochromic properties