检索结果-南通市图书馆

Numerical Study of Flow and Heat Transfer Characteristics of Shell-and-Tube Molten Salt Electric Heater with Circularly Perforated Baffles

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2025年第1期34卷 24-33页

作者： LIN Yongjie zhang Cancan WU Yuting zhang yi LU Yuanwei Key Laboratory of Heat Transfer and Energy Conversion National User-Side Energy Storage Innovation Research and Development CenterBeijing University of Technology

Numerical simulations of the flow and heat transfer characteristics of four shell-and-tube molten salt electric heaters with different perforation rates was ***-and-tube electric heaters have the same geometry and tube arrangement,and all of them use single segmental baffles,but there exist four different baffle openings（φ）,i.e.,0%,2.52%,4.06%,and 6.31%.The results indicated that the reasonable baffle opening could significantly reduce the shell-side pressure drop,effectively decreasing the shell-side flow dead zone *** can eliminate the local high-temperature phenomenon on the surface of electric heating tubes,but the heat transfer coefficient is slightly *** perforated schemes significantly reduce shell-side pressure drop compared to the baseline solution without open *** particular,the φ=6.31% scheme exhibits the optimal performance among all the schemes,with a maximum reduction of up to 50.50% in shell-side pressure drop relative to the unopened holes *** heat transfer coefficient is the highest for φ=0%,exhibiting a range of5.26% to 5.73%,5.14% to 5.99%,and 7.31% to 8.54% higher than φ=2.52%,4.06%,and 6.31%,respectively,within the calculated *** composite index h/（Δp）1/3was higher for all open-hole solutions than that for the unopened-hole *** best overall performance was for φ=6.31%,which improved the composite index by15.29% to 17.18% over the unopened-hole solution.

关键词： molten salt electric heater perforated baffles heat transfer

Bilevel Optimal Scheduling of Island Integrated Energy System Considering Multifactor Pricing

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2025年第1期122卷 349-378页

作者： xin zhang Mingming Yao Daiwen He Jihong zhang Peihong Yang Xiaoming zhang School of Automation and Electrical Engineering Inner Mongolia University of Science and TechnologyBaotou014010China

In this paper,a bilevel optimization model of an integrated energy operator(IEO)–load aggregator(LA)is constructed to address the coordinate optimization challenge of multiple stakeholder island integrated energy system(IIES).The upper level represents the integrated energy operator,and the lower level is the electricity-heatgas load *** to the benefit conflict between the upper and lower levels of the IIES,a dynamic pricing mechanism for coordinating the interests of the upper and lower levels is proposed,combined with factors such as the carbon emissions of the IIES,as well as the lower load interruption *** price of selling energy can be dynamically adjusted to the lower LA in the mechanism,according to the information on carbon emissions and load interruption *** benefits and win-win situations are achieved between the upper and lower ***,CPLEX is used to iteratively solve the bilevel optimization *** optimal solution is selected according to the joint optimal discrimination *** results indicate that the sourceload coordinate operation can reduce the upper and lower operation *** the proposed pricingmechanism,the carbon emissions and load interruption power of IEO-LA are reduced by 9.78%and 70.19%,respectively,and the capture power of the carbon capture equipment is improved by 36.24%.The validity of the proposed model and method is verified.

关键词： Bilevel optimal scheduling load aggregator integrated energy operator carbon emission dynamic pricing mechanism

Search for heavy Majorana neutrinos at future lepton colliders

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

Chinese Physics C 2023年第4期47卷 94-100页

作者：路鹏程司宗国王喆杨兴华张新怡 School of Physics Shandong UniversityJinan 250100China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

A nonzero neutrino mass may be a sign of new physics beyond the standard model(SM).To explain the small neutrino mass,we can extend the SM using right-handed Majorana neutrinos in a low-scale seesaw mechanism,and the CP violation effect can be induced due to the CP phase in the interference of heavy Majorana *** existence of heavy Majorana neutrinos may lead to lepton number violation processes,which can be used to search for the signals of heavy Majorana *** this paper,we focus on the CP violation effect related to two generations of heavy Majorana neutrinos at 15 GeV

关键词： Majorana CP violation future lepton colliders lepton number violation

Visible-light-responsive homologous heterostructure of oxynitrides constructed to boost charge separation and water splitting

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 186-191页

作者： Hai Zou Yunfeng Bao Xueshang xin Yu Qi Tengfeng Xie Fuxiang zhang State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences School of Chemistry and Chemical Engineering Liaoning Normal University College of Chemistry Jilin University

Constructing type II heterostructures represents a widely recognized strategy for enhancing charge separation and photocatalytic efficiency,but it remains challenging to fabricate homologous heterostructures based on visible-light-responsive semiconductors,especially for popularly investigated （oxy）nitrides with low thermal ***,we synthesized a homologous heterostructure （denoted as YTON＿H） based on the oxynitrides of YTaO4-xNyand YTa *** heterostructure exhibits type II band structure alignment and intimate interface achieved through a magnesium （Mg） powder-assisted nitridation *** with widely reported heterologous heterostructures,the as-obtained YTON＿H homologous heterostructure could similarly exhibit enhanced charge separation as well as photocatalytic water splitting performance with respect to its counterparts(YTaO4-xNyand YTaON2).Meanwhile,detailed structural characterizations and spectroscopy analysis have been made to confirm the formation of heterostructure and promotion of spatial charge separation.

关键词： charge separation heterostructure oxynitride photocatalysis visible light

Post-tunable salt gel electrolytes toward flexible supercapacitor switches

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： Hui Wang Shuang Chen Xuming Liu Qin zhang xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials Science Changchun University of Technology Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials Science Changchun University of Technology

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes, and transistors. However, inherent weaknesses in ionic conductivity, mechanical properties,and water retention of hydrogel electrolytes seriously hinder their development. Inspired by the hardness conversion of sea cucumber skin, a conductivity and mechanics dual-tunable salt gel electrolyte is successfully designed. The salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate（SAT）. Meanwhile, the salt gels spontaneously grow a layer of “armor” through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***, this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance: 258.6 mF cm-2), and the capacitance retention rate could still reach 86.9% after 3000 cycles at high temperatures. Moreover, the salt gel supercapacitor is potentially used in over-heat alarm systems. It is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics, and flexible robots.

关键词： Capacitance

Magneto‑Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 401-416页

作者： Chen Li Leilei Liang Baoshan zhang yi Yang Guangbin Ji School of Electronic Science and Engineering Nanjing UniversityNanjing 210093People’s Republic of China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Developing advanced stealth devices to cope with radar-infrared(IR)fusion detection and diverse application scenarios is increasingly demanded,which faces significant challenges due to conflicting microwave and IR cloaking mechanisms and functional integration ***,we propose a multiscale hierarchical structure design,integrating wrinkled MXene IR shielding layer and flexible Fe_(3)O_(4)@C/PDMS microwave absorption *** top wrinkled MXene layer induces the intensive diffuse reflection effect,shielding IR radiation signals while allowing microwave to pass ***,the permeable microwaves are assimilated into the bottom Fe_(3)O_(4)@C/PDMS layer via strong magneto-electric *** theoretical and experimental optimization,the assembled stealth devices realize a near-perfect stealth capability in both X-band(8–12 GHz)and long-wave infrared(8–14μm)wavelength ***,it delivers a radar cross-section reduction of−20 dB m^(2),a large apparent temperature modulation range(ΔT=70℃),and a low average IR emissivity of ***,the optimal device demonstrates exceptional curved surface conformability,self-cleaning capability(contact angle≈129°),and abrasion resistance(recovery time≈5 s).This design strategy promotes the development of multispectral stealth technology and reinforces its applicability and durability in complex and hostile environments.

关键词： Microwave absorption Radar-infrared compatible stealth Wrinkled MXene Magneto-dielectric synergy Multifunction

石墨烯片上螺旋电感的射频建模和参数提取（英文）

在线全文

学校读者我要写书评

暂无评论

红外与毫米波学报 2018年第4期37卷 393-398页

作者：张译心张傲王博冉高建军华东师范大学信息科学技术学院电子工程系上海200062

基于物理原理,对石墨烯螺旋电感提出了一种改进的等效电路模型,该模型在传统π模型的串联支路中增加了RC并联网络.并结合分析法和优化法,对此模型提出了一种参数提取方法.结果表明,在1～40 GHz频率范围内,测试所得S参数和模型仿真所得S... 详细信息

基于物理原理,对石墨烯螺旋电感提出了一种改进的等效电路模型,该模型在传统π模型的串联支路中增加了RC并联网络.并结合分析法和优化法,对此模型提出了一种参数提取方法.结果表明,在1～40 GHz频率范围内,测试所得S参数和模型仿真所得S参数能够高度地吻合.

关键词：等效电路参数提取方法石墨烯电感

Screening and evaluation of human single-chain fragment variable antibody against hepatitis B virus surface antigen

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2006年第2期5卷 237-241页

作者： Jian-Lin zhang, Jian-Jin Guo, Zi-Yan zhang, yi-xin Jing, Lin zhang, Rui Guo, Ping Yan, Niu-Liang Cheng, Bo Niu and Jun Xie Department of Biochemistry and Molecular Biology, Shanxi Medical University ,Taiyuan 030001,China Department of Biochemistry and Molecular Biology Shanxi Medical University Taiyuan 030001China.

BACKGROUND: Phage display technology has become a vital tool in studies aimed at identifying molecules binding to a specific target. It enables the rapid generation and selection of high affinity, fully human antibody product candidates to essentially any disease target appropriate for antibody therapy. In this study, we prepared the recombinant single-chain fragment variable ( ScFv) antibody to hepatitis B virus surface antigen (HBsAg) by the phage display technology for obtaining a virus-targeting mediator. METHODS: mRNA was isolated from B-lymphocytes from a healthy volunteer and converted into cDNA. The fragment variables of heavy and light chain were amplified separately and assembled into ScFv DNA with a specially constructed DNA linker by polymerase chain reaction. The ScFv DNA was ligated into the phagmid vector pCANT-AB5E and the ligated sample was transformed into competent E. coli TG1. The transformed cells were infected with M13K07 helper phage to form a human recombinant phage antibody library. The volume and recombinant rate of the library were evaluated by bacterial colony count and restriction analysis. After two rounds of panning with HBsAg. the phage clones displaying ScFv of the antibody were selected by enzyme-linked immunosorbant assay ( ELISA) from the enriched phage clones. The antigen binding affinity of the positive clone was detected by competition ELISA. HB2151 E. coli was transfected with the positive phage clone demonstrated by competition ELISA for production of a soluble form of the anti-HBsAg ScFv. ELISA assay was used to detect the antigen binding affinity of the soluble anti-HBsAg ScFv. Finally, the relative molecular mass of soluble anti-HBsAg ScFv was measured by SDS-PAGE. RESULTS: The variable heavy ( VH ) and variable light (VL) and ScFv DNAs were about 340bp, 320bp and 750bp, respectively. The volume of the library was up to 2 × 106 and 8 of 10 random clones were recombinants. Two phage clones could strongly compete with the or

关键词： phage display technology phage antibody library hepatitis B virus surface antigen single-chain fragment variable

在线全文

学校读者我要写书评

暂无评论

考虑技能水平的多技能资源约束项目调度

浙江大学学报（工学版） 2017年第5期51卷 1000-1006页

作者：任逸飞陆志强刘欣仪张猛同济大学机械与能源工程学院上海201804

针对带有技能水平的一般多技能资源约束项目调度问题进行扩展,将技能水平进行分级并将技能和资源各分为关键和辅助2类,考虑作业执行时间因分配的关键资源具备的技能水平而变.以最小化项目总工期为目标,建立相应的数学优化模型,提出包含... 详细信息

针对带有技能水平的一般多技能资源约束项目调度问题进行扩展,将技能水平进行分级并将技能和资源各分为关键和辅助2类,考虑作业执行时间因分配的关键资源具备的技能水平而变.以最小化项目总工期为目标,建立相应的数学优化模型,提出包含双层决策及局部优化策略的混合算法.其中,上层的遗传算法用于决策表示作业执行顺序的优先级列表,下层的关键资源决策启发式算法用以确定作业实际执行时间并对上层列表进行解码得到问题的可行解.在所得可行解的基础上,采用基于关键链的局域搜索算法,调整资源分配以缩短关键链长度,保证算法的求解质量.数据实验表明,所提算法在求解质量和求解速度方面均具有良好性能.

关键词：项目调度多技能技能水平执行时间可变优先规则