检索结果-南通市图书馆

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地方社会科学院图书馆网站建设的思考

图书馆论坛 2008年第5期28卷 47-49页

作者：查炜山东社会科学院文献信息中心山东济南250002

通过网上调查的形式,分析了地方社会科学院图书馆网站建设的现状、特点及存在的问题,提出了社科研究机构图书馆网站建设的对策。

关键词：图书馆网站建设对策社会科学院图书馆

Recent Progress in Covalent Organic Frameworks(COFs) for Electrocatalysis

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Chinese Journal of Structural Chemistry 2022年第11期41卷 84-99页

作者： cha Li Zining Qiu Hongming Sun Yijie Yang Cheng-Peng Li College of Chemistry Tianjin Key Laboratory of Structure and Performance for Functional MoleculesTianjin Normal UniversityTianjin 300387China

Electrocatalysis provides various technologies for energy storage and conversion,which is an important part of realizing sustainable clean energy for the ***,as emerging porous crystalline polymers,possess high specific surface areas,tunable pore structures,high crystallinity and tailorable *** features endow COFs with abundant active sites and fast electron transport channels,making them potentially efficient *** recent years,COF-based electrocatalysts have been widely developed for hydrogen evolution reaction(HER),hydrogen oxidation reaction(HOR),oxygen evolution reaction(OER),oxygen reduction reaction(ORR),nitrogen reduction reaction(NRR)and carbon dioxide reduction reaction(CO_(2)RR).In this review,design strategies of COF-based electrocatalysts are briefly summarized,including applying COF as supports,introducing active metals in COF,constructing two-dimensional conductive COF,formation of COF-based hybrid and pyrolysis of COF to obtain carbon ***,the recent research progress in COF-derived catalysts for specific electrocatalytic reactions is introduced ***,the outlook and challenges of future applications of COFs in electrocatalysis are highlighted.

关键词： covalent organic frameworks electrocatalyst catalytic performance catalytic kinetics energy conversion

Performance Study of a Hybrid Heat Pump Dryer based on Numerical Analysis and Experimental Set-up

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Journal of Thermal Science 2021年第1期30卷 111-122页

作者： SHAMSUDDEEN Mohamed Murshid cha Dong-An KIM Seon-chang KANEMOTO Toshiaki KIM Jin-Hyuk Industrial Technology Korea University of Science&TechnologyDaejeon 34113Republic of Korea Thermal&Fluid System R&D Group Korea Institute of Industrial TechnologyCheonan 31056Republic of Korea Institute of Ocean Energy Saga UniversityHonjo 1Saga 840-8502Japan

Seafood,especially sea cucumbers and oysters are an expensive delicacy in several Asian *** sun-drying of these products takes 3 to 4 days and fetches a lower market *** industrial drying machines used for seafood drying are unable to dry sea cucumbers and oysters without texture and color degradation as they are delicate,temperature-sensitive and have longer drying *** economical drying system that does not cause texture or color degradation is the heat pump drying system and is commonly applied for agriculture and fabric *** this study,the heat pump technology is applied to develop two hybrid dryer models(bottom discharge and front discharge)to dry shellfish and sea cucumbers in large scale for storage and *** model is tested in a laboratory-scale with wet sponges as input material for its dehumidification capacity and the power consumed to attain the target *** front discharge model is found to have rapid drying capability and *** fluid dynamic tools are used to study the hot air flow behavior and flow uniformity inside the drying *** front discharge model showed smooth uniform flow over the trays with fewer losses in the flow *** front discharge model with higher drying rate,lower power consumption and uniform airflow distribution over the trays is chosen for the industrial-scale design.

关键词： heat pump hybrid dryer CFD drying rate sea cucumber oyster

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间接起爆对脉冲爆震发动机热效率影响

航空动力学报 2016年第8期31卷 1860-1865页

作者：邱华王玮熊姹西北工业大学动力与能源学院西安710072 中国华能集团西安热工研究院有限公司西安710032

建立了基于整个燃烧室内经历不同燃烧方式下所有工质来评估脉冲爆发动机平均循环热效率的方法,通过二维数值方法对两种采用不同数目障碍物的爆震管模型的起爆特性及循环热效率进行了研究,并分析了燃烧波传播的距离与DDT距离之比(定义为... 详细信息

建立了基于整个燃烧室内经历不同燃烧方式下所有工质来评估脉冲爆发动机平均循环热效率的方法,通过二维数值方法对两种采用不同数目障碍物的爆震管模型的起爆特性及循环热效率进行了研究,并分析了燃烧波传播的距离与DDT距离之比(定义为ξ)对模型热效率的影响.结果表明:1间接起爆方式及不同DDT强化装置都会影响系统的循环热效率;2就计算模型,当ξ接近1时,其系统平均循环热效率仅为理想爆震循环热效率的60%左右;3随着ξ的增加,间接起爆方式的影响迅速减弱;4当ξ为1.5时,系统平均循环热效率可达爆震燃烧热效率的93%.

关键词：脉冲爆震发动机间接起爆爆燃向爆震转变循环热效率爆震室

A new species of Malus in China,Malus shizongensis Liu ***

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Journal of Integrative Agriculture 2020年第10期19卷 2451-2457页

作者： LIU Zhen-zhong LI Zhong-xing GAO Hua BAO cha-na College of Horticulture Northwest A&F UniversityYangling 712100P.R.China State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple College of HorticultureNorthwest A&F UniversityYangling 712100P.R.China

Based on morphological,molecular biological,and molecular systematic studies,we describe here a new species of Malus from Yunnan,*** compared the morphology of this new species,Malus shizongensis Liu ***,with three Malus species,including ***,***,and *** the appearance of *** was similar to these three species,it differed in height,branch color,branch hair,and flower *** better identify the taxonomy of this new species,genome of *** and that of seven Malus species,including ***,***,***,***,***,***,and *** were analyzed.A phylogenetic tree based on genome analysis indicated that *** was close to ***,*** had its species-specific SNPs,and the number of species-specific SNPs was similar to that of three close species(***,***,and ***).Based on the above information,we named this new species as *** Liu ***.

关键词： Malus new species taxonomy

Fabrication of piezoelectric AlN thin film for FBARs

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Science China(Physics,Mechanics & Astronomy) 2009年第2期52卷 226-232页

作者： TAY Kok-Wan KUO Sin-cha WU Menq-Jion Department of Electrical Engineering Wu Feng Institute of Technology Department of Electronics Engineering Far East University Tainan 744 Department of Mechatronics Engineering National Changhua University of Education Changhua 500

This paper focuses on the fabrication of film bulk acoustic-wave resonator (FBAR) comprising an aluminum nitride (AlN) piezoelectric thin film sandwiched between two metal electrodes and located on a silicon substrate with a low-stress silicon nitride (Si3N4) support membrane for high frequency wireless applications, and analyzes the optimization of the thin AlN film deposition parameters on Mo electrodes using the reactive RF magnetron sputter system. Several critical parameters of the sputtering process such as RF power and Ar/N2 flow rate ratio were studied to clarify their effects on different electrodes characteristics of the AlN films. The experiment indicated that the process for Mo electrode was easier compared with that of the Pt/Ti or Au/Cr bi-layer electrode as it entailed only one photo resist and metal deposition step. Besides, Pt/Ti or Au/Cr electrodes reduced the resonance frequency due to their high mass density and low bulk acoustic velocity. Compared with the case of the Al bottom electrode, there is no evident amorphous layer between the Mo bottom electrode and the deposited AlN film. The characteristics of the FBAR devices depend not only upon the thickness and quality of the AlN film, but also upon the thickness of the top electrode and the materials used. The results indicate that decreasing the thickness of either the AlN film or the top electrode increases the resonance frequency. This suggests the potential of tuning the performance of the FBAR device by carefully controlling AlN film thickness. Besides, increasing either the thickness of the AlN film or higher RF power has improved a stronger c-axis orientation and tended to promote a narrower rocking curve full-width at half-maximum (FWHM), but increased both the grain size and the surface roughness. An FBAR device fabricated under optimal AlN deposition parameters has demonstrated the effective electromechanical coupling coefficient (k eff 2 ) and the quality factor (Q f x ) are about 1.5

关键词： sputtering thin film piezoelectric

Method to assess water footprint,a case study for white radishes in Korea

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International Soil and Water Conservation Research 2017年第2期5卷 151-157页

作者： Kyounghoon cha Minjung Son Seokjin Hong Sangjoon An Soonchul Part Ecoable Consulting Corporation Jayang-dongGwangnam-guSeoul 05064Republic of Korea Korea National Cleaner Production Center Korea Institute of Industrial TechnologyTeheran-roGangnam-guSeoul 06211Republic of Korea

This study aimed to assess the water footprint of white radishes which is cultivated during four *** methodology is developed in accordance with ISO 14040s and ISO *** study suggested the water depletion and eutrophication results of white radishes as water footprint *** water de-pletion results are 25.58 m^(3) fres hwater/ton(spring season white radish),20.74 m^(3) freshwater/ton(au-tumn season white radish),26.68 m^(3) freshwater/ton(alpine region white radish),and 2856 m^(3) fresh-water/ton(facility white radish),*** the eutrophication results are 3.23E-11 kg P/ton(spring season white radish),2.66E-11 kg P/ton(autumn season white radish),3.94E-11 kg P/ton(alpine region white radish),and 1.56E-11 kg P/ton(facility white radish),*** conclusion,autumn season white radish is more competitive than other cultivation types in the context of water footprint *** a result,switching from other cultivation types to autumn season white radish is ex-pected to offer a more water-efficient means of white radish ***,drawing upon evidence within this report,decision-makers would be wise to cultivate in more effective water use cultivation type and crop species.

关键词： Water footprint Water depletion Water degradation Water quality Hydrological impact White radishes

SPECIAL ISSUE EDITORIAL ON ADVANCES IN COLLABORATIVE SYSTEMS ENGINEERING FOR PRODUCT DESIGN, PRODUCTION AND SERVICE NETWORK

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Journal of Systems Science and Systems Engineering 2016年第2期25卷 139-141页

作者： Amy J.C. Trappey weiming Shen John Jianzhong cha Department of Industrial Engineering and Engineering Management National Tsing Hua University Taiwan China Integrated Manufacturing Technologies Institute National Research Council Canada Canada Department of Mechanical Engineering Beijing Jiaotong University China

From the perspectives of engineering （CE）, computer concurrent supported cooperative work （CSCW）, product lifecycle management （PLM）, to collaborative supply chain and service network, collaborative systems engineering （CSE） has been extended and enriched in many research efforts. CSE is not just a technique or method but also a fundamental business philosophy and strategy.

关键词： perspectives concurrent engineering

Alleviating vibrations along a harmonically driven nonuniform Euler-Bernoulli beam by imposing nodes

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International Journal of Mechanical System Dynamics 2023年第4期3卷 345-359页

作者： Melis Baltan‐Brunet Fionna Kopp Philip D.cha Department of Engineering Harvey Mudd CollegeClaremontCaliforniaUSA

A passive approach is developed to quench excess vibration along a harmonically driven,arbitrarily supported,nonuniform Euler-Bernoulli beam with constant thickness(height)and varying *** suppression is achieved by attaching properly tuned vibration absorbers to enforce nodes,or points of zero vibration,along the *** efficient hybrid method is proposed whereby the finite element method is used to model the nonuniform beams,and a formulation based on the assumed modes method is used to determine the required attachment force supplied by each absorber to induce the desired *** the attachment forces needed to induce nodes,design plots are generated for the absorber parameters as a function of the tolerable vibration amplitude for each absorber *** the node locations are judiciously chosen,it is possible to dramatically suppress the vibration along a selected region of the *** such,sensitive instruments can be placed in this region and will remain nearly *** studies illustrate the application to several systems with various types of nonuniformity,boundary conditions,and attachment and node locations;these examples validate the proposed method to passively control excess vibration by inducing nodes on nonuniform beams subjected to harmonic excitations.

关键词： vibration suppression nonuniform beam vibration absorber finite element enforcing nodes