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区域中长期合约电量输电路径优化对省内现货市场出清的影响

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广东电力 2024年第5期37卷 43-51页

作者：张银芽李锋刘念余旸严泽张科杰国家电网有限公司华中分部湖北武汉430000 北京清能互联科技有限公司北京100080

区域中长期电力市场是区域电力市场的主要研究对象之一,为提高合约电量利用率,降低交易电量因传输通道未被充分利用或线路过载而被削减的可能性,基于目前的区域中长期合约定价机制,以“点对点”交易方式为基础,结合电网各类分布因子,以... 详细信息

区域中长期电力市场是区域电力市场的主要研究对象之一,为提高合约电量利用率,降低交易电量因传输通道未被充分利用或线路过载而被削减的可能性,基于目前的区域中长期合约定价机制,以“点对点”交易方式为基础,结合电网各类分布因子,以区域中长期合约电量线损量最小为目标函数,对区域中长期合约电量传输路径进行优化,并将新的优化路径作为省内现货出清的约束条件,研究区域中长期合约电量路径优化对省内现货出清结果的影响,以及对降低省内线路潮流量的效果。为此,分别建立省内现货出清模型和区域中长期路径优化模型,找到两者的约束耦合关系。最后,利用IEEE 30节点系统进行算例仿真,分析区域中长期合约路径优化对降低其合约能量损耗和降低省内现货出清线路潮流的可能性。

关键词：现货市场中长期市场交易路径优化出清

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Printing High-resolution Micro-patterns by Solution Processes

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Chemical Research in Chinese Universities 2021年第5期37卷 1008-1018页

作者： zhang kejie zhang Min LIU Huan Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringInternational Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing100191P.R.China

The preparation of high-resolution micro-patterns is urgently demanded for developing opto-/electric-devices in various ***,solution processes have been commonly used for fabricating micro-patterned surfaces for its mild operation conditions,facile operability and *** this contribution,we reviewed recent processes on preparing micro-/nano-patterns using solution processes based the viewpoint of resolution,including inkjet printing,photolithography,micro-contact printing.

关键词： resolution preparing viewpoint

胸腰椎OVCF椎体成形术后腰背痛风险预测模型构建

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浙江创伤外科 2024年第10期29卷 1805-1807,1812页

作者：章柯杰张聪陈威烨朱利民浙江省杭州市富阳中医骨伤医院杭州311400

目的探讨胸腰椎骨质疏松性椎体压缩性骨折(OVCF)椎体成形术后腰背痛残留风险并进一步构建相关预测模型,旨在为后续临床防治方案制定提供参考。方法回顾性纳入2021年1月至2022年12月于本院接受椎体成形术治疗胸腰椎OVCF患者共120例,根据... 详细信息

目的探讨胸腰椎骨质疏松性椎体压缩性骨折(OVCF)椎体成形术后腰背痛残留风险并进一步构建相关预测模型,旨在为后续临床防治方案制定提供参考。方法回顾性纳入2021年1月至2022年12月于本院接受椎体成形术治疗胸腰椎OVCF患者共120例,根据术后4周腰背疼痛视觉模拟评分分为残留组和未残留组,采用单因素和多因素法评估胸腰椎OVCF椎体成形术后腰背痛残留独立危险因素;同时基于上述因素构建预测模型并分析上述模型用于胸腰椎OVCF椎体成形术后腰背痛残留风险预测临床效能。结果120例胸腰椎OVCF患者中术后4周腰背痛残留13例,发生率为10.83%。单因素分析结果显示,椎体骨折数量、有无椎管内真空裂隙征、有无后筋膜水肿、椎旁肌变性分级及骨水泥分布类型均可能与胸腰椎OVCF椎体成形术后腰背痛残留有关(P<0.05);Logistic回归模型多因素分析结果显示,多椎体骨折、椎管内真空裂隙征、椎旁肌变性≥Ⅲ级及骨水泥块状分布均是胸腰椎OVCF椎体成形术后腰背痛残留独立危险因素(P<0.05)。基于多因素分析所确定独立危险因素构建胸腰椎OVCF椎体成形术后腰背痛残留风险预测偏回归系数方程:发生风险Logit(Y)=0.87+1.97×多椎体骨折+2.74×椎管内真空裂隙征+3.11×椎旁肌变性≥Ⅲ级+1.50×骨水泥块状分布;ROC曲线分析结果显示,上述临床预测模型用于老胸腰椎OVCF椎体成形术后腰背痛残留风险预测临床效能显著优于单一危险因素(P<0.05)。结论胸腰椎OVCF椎体成形术后腰背痛残留可能与包括椎体骨折数量、有无椎管内真空裂隙征、椎旁肌变性分级及骨水泥分布类型在内多种因素有关;而基于上述因素构建预测模型在早期准确识别腰椎OVCF椎体成形术后腰背痛残留高危人群方面显示出更佳临床效能。

关键词：胸腰椎骨质疏松性椎体压缩性骨折椎体成形术腰背痛残留

Effect of solvent on Se-modified ruthenium/carbon catalyst for oxygen reduction

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Progress in Natural Science:Materials International 2014年第6期24卷 671-675页

作者： Chuanxiang zhang Haijun Tao Yuming Dai Xiancong He kejie zhang School of Materials Science and Engineering Nanjing Institute of Technology Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology College of Material Science and Technology Nanjing University of Aeronautics & Astronautics

Se-modified ruthenium supporting on carbon(Sex–Ru/C) electrocatalyst was prepared by solvothermal one-step synthesis method. The reaction mechanism was revealed after discussing impact of different solvents(i-propanol and EG) in solvotermal reaction. The result showed that the grain size of Se-modified ruthenium electrocatalyst was as small as 1 to 3 nm and highly dispersed on carbon surface. X-ray photoelectron spectroscopy(XPS) presented that selenium mainly existed in the catalyst in the form of elemental selenium and selenium oxides when the solvent was EG and i-propanol, respectively. The oxygen reduction reaction(ORR) performance was improved by appearance of selenium oxides.

关键词： Sex–Ru/C Solvotermal reaction Selenium oxides Oxygen reduction reaction

毛花猕猴桃可培养内生真菌菌群结构、多样性及生物活性分析

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中草药 2024年第10期55卷 3497-3505页

作者：黄情儿吴婷张轲杰何玟叶曹家旗许静怡秦路平朱波浙江中医药大学药学院浙江杭州311402

目的探讨毛花猕猴桃Actinidia eriantha可培养内生真菌的菌群结构、多样性、分布规律及其活性,为内生真菌资源利用提供依据。方法对毛花猕猴桃3个部位(根、茎、叶)内生真菌进行分离、纯化与ITS分子鉴定,分析其菌群结构、多样性与分布规... 详细信息

目的探讨毛花猕猴桃Actinidia eriantha可培养内生真菌的菌群结构、多样性、分布规律及其活性,为内生真菌资源利用提供依据。方法对毛花猕猴桃3个部位(根、茎、叶)内生真菌进行分离、纯化与ITS分子鉴定,分析其菌群结构、多样性与分布规律;采用拟南芥共培养、病原菌平板对峙的方法,对内生真菌进行促生与病原菌拮抗活性筛选。结果共分离得到2446株内生真菌,分为156个形态型,ITS分子鉴定为49个分类单位,归属于真菌界3门5纲10目14科18属,其中子囊菌门真菌数量最多,占比94.89%;根、茎、叶共有菌30种,其中Trichoderma spirale是根的特有种,Bionectria ochroleuca是茎的特有种;Shannon-Wiener(H’)以茎多样性指数最高,Simpson指数(D)以叶多样性指数最高;筛选得到显著促拟南芥生长活性的内生真菌AE16,鉴定为Clonostachys sp.,其共生拟南芥鲜质量增长率为(37.13±10.35)%;具有显著抑菌活性的内生真菌11株(木霉属10株,白僵菌属1株),其中AE175(Trichoderma sp.)抑制效果最好,相对抑菌率为(87.59±9.36)%。结论畲药毛花猕猴桃内生真菌资源丰富,筛选得到的活性菌株为毛花猕猴桃内生真菌资源开发和利用提供依据。

关键词：毛花猕猴桃内生真菌菌群结构多样性生物活性

Ultra-Highly Cross-Aligned AgNWs Network by a Facile Liquid-Bridge Assisted Couette-Flow Solution Process:Toward Mass-Producing High-Performance Flexible Transparent Electrodes

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CCS Chemistry 2023年第12期5卷 2855-2865页

作者： Xiaoxun Li Lili Meng Min zhang kejie zhang Lei Jiang Huan Liu Research Institute for Frontier Science Beihang UniversityBeijing 100191 Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191 Ji Hua Laboratory FoshanGuangdong 528000

Cross-aligned silver nanowires(CA-AgNWs),a unique networkwidely used in flexible transparent electrodes(FTEs),have been well developed using various solution ***,these approaches suffer from limitations of both the large alignment deviation and solution waste,especially in large-area fabrication,which deteriorates the performance of ***,we developed a facile liquid-bridge assisted Couette-flow solution shearing approach,which enables aligning AgNWs into a highly ordered horizontal array over a large area(120 cm^(2)).Particularly,the alignment deviation,evaluated by the statistic,full width at half-maximum,is rather small with a value of ca.12.6,several times lower than those made by other solution *** fibrous liquid-bridge is responsible for transferring liquid steadily onto the substrate,during which process AgNWs are aligned roughly by the solution *** is worth noting that the enhanced shearing force(SF)by Couetteflow allows for further ***,the ultra-highly CA-AgNWs network was prepared,leading to a high-performance FTE with high conductivity(7Ωsq^(-1)),high transparency(93%),long lifetime(over 180 days),good adhesion-stability(200 times tape test),and good ***,the strategy is applicable for mass-production,benefiting the practical applications of high-performance optoelectronic devices.

关键词： flexible transparent electrode AgNWs cross-aligned Couette-flow solution shearing

Effects of Co and Nb on the Crack of Additive Manufacturing Nickel-Based Superalloys

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Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1601-1610页

作者： kejie Tan Jinli Xie Hailong Qin Bin Xu Guichen Hou Jinguo Li Zhongnan Bi Ji zhang Beijing Key Laboratory of Advanced High Temperature Materials Central Iron&Steel Research InstituteBeijing100081China Beijing GAONA Materials&Technology Co. LTDBeijing100081China Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Increasing the print quality is the critical requirement for the additive manufactured complex part of aero-engines of nickel-based superalloys.A study of the effects of Co and Nb on the crack is performed focusing on the selective laser melting(SLM)nickel-based *** this paper,the solvus temperature of γ',crack characteristics,microstructure,thermal expansion,and mechanical properties of SLM nickel-based superalloy are investigated by varying the content of Co and *** alloy with 15Co/0Nb shows the highest comprehensive *** increases the crack risk and thermal deformation,and then Co accelerates the stress ***,Co is an extremely important alloying element for improving the quality of SLM nickel-based ***,the crack growth kinetics and the strain difference are discussed to reveal the SLM crack regular that is affected by time or *** analysis work on the effect of alloying elements can obtain an effective foundational theory to guide the composition optimization of SLM nickel-based superalloys.

关键词： Nickel-based superalloys Selective laser melting Element effect Crack

A Modified Heuristic for Premptive Parallel Machine Scheduling with Batch Set-up Times

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Systems Science and Systems Engineering 1997年第3期7卷 102-106页

作者： zhang Yuzhong MA kejie Institute of Operations Research Qufu Normal University, Qufu 273165

A new heuristic for preemptive parallel machine scheduling with batch set up time is provided by modifying some recent algorithms, we prove that it has a better asymptotic performance in some sence.

关键词： heuristic set up asymptotic performance

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民用建筑热水系统常见设计错误分析

给水排水 2023年第S1期49卷 349-354页

作者：张科杰上海水石建筑规划设计股份有限公司上海200041

对热水系统设计过程中出现的常见错误进行了归纳总结,分析了错误发生的原因,提出了对应的解决方法,以避免给排水设计师今后发生类似的错误。

关键词：热水系统减压阀冷、热水同源