检索结果-南通市图书馆

Science China(Technological Sciences) 2018年第7期61卷 982-993页

作者： wang kunyu CHENG Lin Institute of Thermal Science and Technology Shandong University

A novel cross-flow heat exchanger with a rotated aligned tube bank is designed and utilized in a cement plant. The heat exchanger is numerically modeled with various tube pitches in order to obtain correlations of the shell-side average Nusselt number and friction factor. Then, a multi-objective optimization approach is performed based on the genetic algorithm. The goal of this study is to maximize the heat transfer rate and minimize the pressure drop. Pareto optimal solutions are obtained, which indicate that the increase in the heat transfer rate leads to an increase in pressure drop, and vice versa. In addition, heat exchanger effectiveness, total cost, and the ratio of the heat transfer rate to the fan/pumping power demonstrate different variations with the two objective functions. Several selection criteria are discussed to determine the optimal design and to help designers select an appropriate solution based on actual requirements. Two multi-objective optimization design schemes are compared to the original design under the same heat transfer rate. Results show that pressure drop decreases by 67.9% and 69.7%, respectively,and total annual cost decreases by 2.4% and 16.3%, respectively.

关键词： tube bank numerical modeling multi-objective optimization genetic algorithm

Dynamic-static coupled sensing of trace biomarkers by molecularly imprinted metal-organic frameworks

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第12期66卷 3511-3517页

作者： Hui Min Zongsu Han Tiankai Sun kunyu wang Jun Xu Peiyu Yao Sihai Yang Peng Cheng Wei Shi Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering&National Institute for Advanced Materials Center for Rare Earth and Inorganic Functional Materials Tianjin Key Lab for Rare Earth Materials and ApplicationsNankai UniversityTianjin 300350China Department of Emergency Tianjin Union Medical CenterTianjin 300121China Department of Chemistry University of ManchesterManchester M139PLUK College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Accommodating target analytes within the pores of metal-organic frameworks(MOFs)to improve the sensing performance is an important but challenging ***,we report a novel molecular imprinting strategy to create target recognition sites in a tailored multicomponent MOF with the inter-ligand synergistic antenna effect to lanthanide ions,enabling selective recognition of trace biomarkers,which is critical to the early diagnosis of age-related diseases in blood samples with high sensitivity and ultralow limit of detection(LOD)of 69 nmol L^(-1).Compared with MOF-based sensors without imprinted recognition sites,the significantly enhanced sensing performance(both sensitivity and LOD)was attributed to a dynamic-static coupled sensing mechanism:the dynamic interactions involve concentrating the trace biomarkers at the imprinted recognition sites to enhance the sensing performance at ultralow concentration,and the static interactions are derived from electron/energy exchange between the molecularly imprinted MOF and the biomarker to govern the sensing *** work establishes a new molecular imprinting strategy to attain advanced materials for sensing trace bio-analytes.

关键词： molecularly imprinted metal-organic frameworks dynamic-static coupled sensing biomarker recognition

Research on Digital Twin System Platform Framework and Key Technologies of Unmanned Ground Equipment

在线全文

学校读者我要写书评

暂无评论

Complex System Modeling and Simulation 2024年第2期4卷 109-123页

作者： kunyu wang Lin Zhang Cheng Xu Han Lu Zhen Chen Hongbo Cheng Rui Guo the School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China the State Key Laboratory of Intelligent Manufacturing System Technology Beijing 100854China the Beijing Institute of Electronic System Engineering Beijing 100854China

As an emerging technology,digital twin is expected to bring novel application modes to the whole life cycle process of unmanned ground equipment,including research and development,design,control optimization,operation and maintenance,*** highly dynamic,complex,and uncertain characteristics of unmanned ground equipment and the battlefield environment also pose new challenges for digital twin *** from the new challenges faced by the digital twin of unmanned ground equipment,this paper designs a service-oriented cloud-edge-end collaborative platform architecture of the digital twin system of unmanned ground equipment,and further analyzes several key technologies supporting the implementation of the platform architecture.

关键词： unmanned ground equipment digital twin native cloud platform Modeling and Simulation(M&S) artificial intelligence

Observation of oxygen evolution over a {Ni12}-cluster-based metal-organic framework

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

Science China Chemistry 2022年第6期65卷 1088-1093页

作者： Zongsu Han Zheng Yan kunyu wang Xinchen Kang Kai Lv Xiaoping Zhang Zhen Zhou Sihai Yang Wei Shi Peng Cheng Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin300071China College of Biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing314001China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Chemistry University of ManchesterManchesterM139PLUK School of Materials Science and Engineering Institute of New Energy Material ChemistryNankai UniversityTianjin300350China

The development of efficient electrocatalysts based on non-noble metals for oxygen evolution reaction(OER) remains an important and challenging task. Multinuclear transition-metal clusters with high structural stability are promising OER catalysts but their catalytic role is poorly understood. Here we report the crystallographic observation of OER activity over robust {Ni12}-clusters immobilised in a porous metal-organic framework, NKU-100, by single-crystal X-ray diffraction as a function of external applied potential. We observed the aggregation of confined oxygen species around the {Ni12}-cluster as a function of applied potential during the electrocatalytic process. The refined occupancy of these oxygen species shows a strong correlation with the variation of current density. This study demonstrates that the enrichment of oxygen species in the secondary coordination sphere of multinuclear transition-metal clusters can promote the OER activity.

关键词： metal-organic framework oxygen evolution reaction secondary coordination sphere X-ray diffraction binding site

A Multi-Channel CMOS Analog Front-End Interface IC with 157.8 d B Current Detection Dynamic Range

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第2期33卷 393-402页

作者： kunyu wang Wenjing XU Chengbin ZHANG Yanjun YANG Man-Kay LAW Li ZHOU Jie CHEN Ming CHEN Institute of Microelectronics of the Chinese Academy of Science University of Chinese Academy of Sciences Zunyi Normal University Institute of Microelectronics and Dept.of ECE FST University of Macau

A high dynamic range and low-noise CMOS(complementary metal-oxide-semiconductor transistor)front-end interface integrated circuit(IC) with multi-channel detection is presented in this paper. Two different current detection channels, composed of a trans-impedance amplifier(TIA) and an integrator-differentiator TIA, are used to boost the current detection range. A capacitance-coupled instrument amplifier(CCIA) is also included to realize high precision voltage detection. A fourth-order sigma-delta modulator using a second-order loop filter and a second-order noise shaping integral quantizer is adopted to realize effective number of bits above 16 bits. The presented interface IC is implemented in 0.18-μm CMOS process with supply voltage of 3.3 V, and a proto-type electrochemical sensor platform with miniaturized sensor array is developed to verify the functionality of the interface IC. Measurement results indicate that the designed interface IC achieves 157.8 d B current detection dynamic range, and the measured input-referred current noise and voltage noise floor are 1.04 p A and 58.4 n V within 10 k Hz integration bandwidths,respectively.

关键词： Integrated circuits Sigma-delta modulation Semiconductor device measurement Voltage measurement Current measurement Noise Bandwidth

A Multicenter Metal–Organic Framework for Quantitative Detection of Multicomponent Organic Mixtures

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2022年第10期4卷 3238-3245页

作者： Zongsu Han kunyu wang Yinlin Chen Jiangnan Li Simon JTeat Sihai Yang Wei Shi Peng Cheng Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071 Department of Chemistry The University of ManchesterManchester M139PL Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA 94720

Instant recognition and quantification of multicomponent organicmixtures,especially the oneswith similar characteristics,remains a key challenge in the chemical *** luminescence sensing is considered a rapid and facile method for the detection of various chemical substances,the simultaneous and quantitative detection of three or more components has not yet been ***,we report a rationally designed white-light-emitting metal–organic framework(MOF)EuTb@NKU-102,and demonstrate its application in the simultaneous discrimination of multicomponent organic mixtures.

关键词： multicenter emission multicomponent mixture isomer sensing material metal–organic framework

Landscape Planning for the Pond Renovation Engineering in East District of Hekou City, Henan Province

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 Landscape Research 2015年第3期7卷 51-53页

作者： GENG Man wang kunyu DUAN Lei ZHU Yuqi Parks Administration of Zhoukou City Zhoukou Forestry Bureau

Pond is the lung of city and a signifi cant ecological infrastructure on which sustainable development of the city relies, it plays an essential role in maintaining healthy development of the city. This paper, on the basis of landscape design theories, explored the means of restoring ecological conditions of abandoned ponds in the city, applied various approaches to create park green spaces with beautiful landscapes and complete functions. Pond renovation is an essential task in the rapid urban construction.

关键词： Pond renovation Landscape planning Zhoukou

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

国家发展战略与能源效率

经济评论 2017年第5期 3-13页

作者：王坤宇加拿大渥太华大学经济学院

能源效率的跨国差异在文献中被广泛的关注,但是现有的实证研究并没有提供较有说服力的经验证据指出能源效率差异的决定要素。本文认为,国家间能源效率的巨大差异主要归因于各个国家在不同发展阶段实施的不同发展战略。如果一国追求重工... 详细信息

能源效率的跨国差异在文献中被广泛的关注,但是现有的实证研究并没有提供较有说服力的经验证据指出能源效率差异的决定要素。本文认为,国家间能源效率的巨大差异主要归因于各个国家在不同发展阶段实施的不同发展战略。如果一国追求重工业优先发展的赶超战略,那么该国生产要素存量配置结构必将违背由本国的要素禀赋结构决定的比较优势,从而导致国内的赶超企业缺乏自生能力,因此政府必须以扭曲市场最优配置的方式保护补贴缺乏自生能力的企业。在违背比较优势的发展战略下,扭曲的能源价格体系使得能源价格不能充分反映本国的要素禀赋结构特征,从而导致能源效率的低下。基于跨国数据的实证结果证明了本文的假说。

关键词：发展战略能源效率新结构经济学

《民法典》视野下滑雪场的安全保障义务研究--基于504份裁判文书的分析

在线全文

学校读者我要写书评

暂无评论

体育学刊 2024年第4期31卷 55-63页

作者：王堃宇吉林大学法学院吉林长春130012

后冬奥时代在公众热衷参与滑雪运动的同时,滑雪事故频繁发生,这需要滑雪场正确履行《民法典》第1198条规定的安全保障义务。通过对504份裁判文书分析发现,滑雪场涉安全保障义务纠纷数量稳中有升,同时表现出一定的地区差异性。就裁判结... 详细信息

后冬奥时代在公众热衷参与滑雪运动的同时,滑雪事故频繁发生,这需要滑雪场正确履行《民法典》第1198条规定的安全保障义务。通过对504份裁判文书分析发现,滑雪场涉安全保障义务纠纷数量稳中有升,同时表现出一定的地区差异性。就裁判结果而言,当事人对抗激烈且法院倾向判决滑雪场承担责任,另有近半数案件的受害人以保险方式获得救济。此外,法院在判断滑雪场是否违反安全保障义务、如何配置第三人侵权时滑雪场的责任、如何采纳滑雪场责任的抗辩事由、如何分配举证责任以及滑雪场是否赔偿精神损害等方面缺少统一的裁判标准,存在裁判规则供给的局促。对此,应该承认过错要素在判定滑雪场安全保障责任的独立价值,动态把握滑雪场安全保障义务裁判尺度,要求第三人侵权时滑雪场承担补充责任,允许滑雪场援引自甘风险规则等抗辩事由减轻责任,妥当配置滑雪场的举证责任,导正滑雪场赔偿精神损害的裁判思路,从而为冰雪经济的健康持续发展注入法治力量。

关键词：体育法冰雪经济滑雪场民法典安全保障义务

在线全文

学校读者我要写书评

暂无评论

论后人类审美的三个维度

学术研究 2021年第3期 160-166页

作者：王坤宇重庆师范大学文学院重庆401331 美国佛蒙特大学

在人工智能、大数据、基因工程等高科技的影响下,人类有可能从繁重的体力劳动中解放出来,创造性和审美化的生活或可成为后人类存在和生成的常态。因此,探讨后人类美学的可能维度,对于正在经历和即将到来的后人类生存及审美诸体验具有重... 详细信息

在人工智能、大数据、基因工程等高科技的影响下,人类有可能从繁重的体力劳动中解放出来,创造性和审美化的生活或可成为后人类存在和生成的常态。因此,探讨后人类美学的可能维度,对于正在经历和即将到来的后人类生存及审美诸体验具有重要意义。目前后人类美学对人机交互这一前景的可能性维度做了较多推演,但对切近的后人类艺术体验、媒介—身体的后人类新主体,以及如何平衡后人类虚拟沉浸成瘾症候等现实问题还缺少研究。推演性后人类影像审美是当前大众媒介播撒后人类话语和意象的抓手,后人类媒介—身体的虚拟体验兆示着审美主体和审美样态的重要变革,这两种审美是当前和未来后人类审美的主要样态,其虚拟现实成瘾问题需要通过某种实践性来平衡,而后人类生态审美正可以扮演这一角色。

关键词：后人类审美推演性后人类影像媒介—身体主体生态后人类审美