检索结果-南通市图书馆

Electrospinning in membrane contactor:manufacturing Elec-PVDF/SiO2 superhydrophobic surface for efficient flue gas desulphurization applications

引用

Green Chemical Engineering 2021年第1期2卷 111-121页

作者： Qingping Xin Kaiqiang Xie Qingqing Liang Xu Li Yinan Zeng Yuhang Zhao Lei zhang Shaofei Wang Hong Li yuzhong zhang State Key Laboratory of Separation Membranes and Membrane Processes School of Materials Science and EngineeringTiangong UniversityTianjin300387China Department of Chemical Engineering Massachusetts Institute of TechnologyCambridgeMA02139United States

In membrane contactors,maintaining a high SO_(2)absorption flux and an excellent wetting resistance are crucial for hazardous gas *** this study,we adopted an electrospinning strategy to fabricate highly robust superhydrophobic dual-layer Elec-PVDF/SiO_(2)composite membrane contactors used for flue gas *** composite membrane contactor consisted of a durable and ultrathin three-dimensional(3D)superhydrophobic surface and a porous supporting layer,where the formulation was optimized by regulating the PVDF concentration,solvent ratio and SiO_(2)particles content in electrospinning *** scanning electronic microscopy(SEM),EDS-mapping,water contact angle(WCA)and surface roughness of as-prepared Elec-PVDF/SiO_(2)composite membrane contactors were conducted to explore the physical and chemical *** SiO_(2)nanoparticles were uniformly loaded in ElecPVDF/SiO_(2)composite membrane contactor,and constructed micro-nano dual-coarse lotus-leaf-like morphology,which noticeably elevated surface roughness(Ra).The SiO_(2)nanoparticles also functioned as hydrophobic modifiers,which boosted the WAC up to 155.The SO_(2)absorption fluxes and SO_(2)removal efficiencies were *** particular,the membrane contactor doped with 20 wt%SiO_(2)nanoparticles significantly elevated the stability of desulfurization ***,the membrane mass transfer coefficient(Km)and corresponding membrane mass transfer resistance(H/Km)were explored.

关键词： Electrospinning Composite membrane contactor Superhydrophobic surface Flue gas desulfurization SO2 absorption flux

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Decision Method Based on Competition Model

引用

Journal of Systems Science and Information 2007年第2期5卷 117-122页

作者： Cuiping Wei yuzhong zhang Institute of Operations Research Qufu Normal University Rizhao 276826 China

We propose a decision method -double scale method to derive the priority vector of finite alternatives with respect to a single criterion based on competition model. Compared with the attribute hierarchical model, the... 详细信息

关键词： multi-criteria decision comparison matrix the double scale

来源：

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

Voltammetric Determination of Vitamin B6 at Glassy Carbon Electrode Modified with Gold Nanoparticles and Multi-Walled Carbon Nanotubes

引用

American Journal of Analytical Chemistry 2011年第2期2卷 194-199页

作者： yuzhong zhang Yuehong Wang 不详

In this work, the gold nanoparticles (Au NPs)/multi-walled carbon nanotubes (MWCNTs) composite film modified glassy carbon electrode (GCE) was fabricated, and scanning electron microscopy (SEM) was used to investigate the assemble process of the composite film. In pH 7.0 PBS, a oxidation peak of the vitamin B6 (VB6) was only observed at composite film modified electrode. Under the optimized conditions, the current intensity was linear with the concentrations of VB6 in the range of 1.59 to 102.74 μg●mL–1 with a detection limit of 0.53 μg●mL–1 (S/N = 3). The modified electrode had been applied in medication analysis, and obtained good results.

关键词： Vitamin B6 Gold Nanoparticles Multi-Walled Carbon Nanotubes Differential Pulse Voltammetry

来源：

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

直流电刺激诱发的前庭诱发肌源性电位在耳源性眩晕疾病精细化诊断中的应用

引用

国际耳鼻咽喉头颈外科杂志 2024年第5期48卷 273-278页

作者：姚远徐铭蔚吴琼张勤张玉忠肖倩文陈飞云杨军金玉莲张青上海交通大学医学院附属新华医院耳鼻咽喉头颈外科上海200082 上海交通大学医学院耳科学研究所上海200082 上海耳鼻疾病转化医学重点实验室上海200082

耳源性眩晕属于周围性眩晕,是耳鼻咽喉科常见病和多发病,精细化诊断是获得良好疗效的前提。前庭诱发肌源性电位(vestibular evoked myogenic potential,VEMP)是一种用于评估内耳耳石器及其传导通路功能的一种检查方法。其中,直流电刺激(... 详细信息

耳源性眩晕属于周围性眩晕,是耳鼻咽喉科常见病和多发病,精细化诊断是获得良好疗效的前提。前庭诱发肌源性电位(vestibular evoked myogenic potential,VEMP)是一种用于评估内耳耳石器及其传导通路功能的一种检查方法。其中,直流电刺激(galvanic vestibular stimulation,GVS)诱发的VEMPs(GVS-VEMPs)是一种新兴的临床检测,迄今还没有获得广泛应用,相关机制及临床应用价值仍需进一步探讨。本文将对GVS-VEMPs的记录方法、研究价值以及临床应用做一综述。

关键词：前庭功能试验前庭,迷路迷路疾病前庭诱发肌源性电位电刺激疗法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Innovation and Decision-making Management Key Manipulation

引用

International Journal of Technology Management 2013年第3期 76-79页

作者： Baohui zhang yuzhong zhang School of Management Qufu Normal University Rizhao Shandong272100 China

This thesis focuses on corporate decision-making and innovation as a process of the system as a whole. The innovative nature of the activities is to change the existing state of technology or management, and that re-combination of factors of production or knowledge base of the organization. Decision-making and innovation is a concentrated expression of the entrepreneurial ability and achievements. Proposed an optimized model of decision-making and innovation, and for the first time put forward the concept of ＂decision-making innovation manipulation critical platform＂ and manipulation instructions, provide a guiding framework for corporate decision-making innovation and capacity building, and has a certain practical significance.

关键词： innovation and decision-making process system the key manipulation

来源：

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

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

H_2/CO_2 Gas Transport Performance in Poly(Ethylene Oxide) Reverse-selective Membrane with Star-like Structures

引用

Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 195-200页

作者： ZHAO Hongyong DING Xiaoli State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membrane Tianjin Polytechnic University Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes Tianjin Polytechnic University School of Environmental and Chemical Engineering Tianjin Polytechnic University Institute of Separation Material and Process Control School of Material Science and EngineeringTianjin Polytechnic University

A series of poly(ethylene oxide)(PEO) membranes with star-like structures for CO_2/H_2 separation were prepared by the photo-polymerization method. The structure of PEO membrane was characterized by Fourier transform infrared spectroscopy(FTIR). The thermal property and inter-segmental distance of polymer chain were investigated by differential scanning calorimetry and wide-angle X-ray diffraction, respectively. The density was determined by hydrostatic weighing method. The gas permeability, solubility and diffusivity of CO_2 and H_2 were investigated in the star-like PEO membranes. The relationship between gas permeation performances and physical properties was also discussed. The membrane exhibits outstanding CO_2 permeability(about 9.7×10^(-11) cm^3(STP) cm/cm^2/s/Pa) and CO_2/H_2 selectivity(about 11) compared with other membranes.

关键词： hydrogen purification reverse-selective membrane poly(ethylene oxide) star-like structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

城市发展与包容性关系研究

引用

上海行政学院学报 2010年第1期11卷 85-95页

作者：张宇钟上海行政学院上海200233

城市的产生和发展是多种因素综合作用的结果。在城市的变迁与发展历程中,包容性起了重要的作用。它具有吸纳和整合诸多力量的特征与功能,对城市的形成和发展起了基础性的支撑与催化作用。但是,包容性对城市的发展并非总是有利的,包容不... 详细信息

城市的产生和发展是多种因素综合作用的结果。在城市的变迁与发展历程中,包容性起了重要的作用。它具有吸纳和整合诸多力量的特征与功能,对城市的形成和发展起了基础性的支撑与催化作用。但是,包容性对城市的发展并非总是有利的,包容不当或失度都会产生不利的影响与作用。城市的发展与繁荣需要科学的包容,也需要创新包容性。

关键词：城市城市发展包容性城市包容性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Global convergence property of s-dependent GFR conjugate gradient method

引用

Chinese Science Bulletin 1998年第23期43卷 1959-1965页

作者： WANG Changyu 1,2 and zhang yuzhong\+1 1. Institute of Operations Research in Qufu Normal University, Qufu 273165, China 2. Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, China Institute of Operations Research Qufu Normal University Qufu China Institute of Applied Mathematics Chinese Academy of Sciences Beijing China

An \%S\%_dependent GFR method and a generalized conjugate gradient method are designed. Two estimated values of upper bounds for the ratio of β k to β FR k are given. The two convergence theorems are proved. The global convergent properties of \%s\%_dependent GFR method are obtained adopting several choice strategies of steplength and some results in recent literature are extended.

关键词： steplength linear search global convergence conjugate gradient.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatio-temporal evolution and topographic gradient effect of land use and ecosystem service value in the Lhasa River Basin

引用

Journal of Mountain Science 2024年第6期21卷 2059-2074页

作者： ZHOU Jianwei FENG Bin WU Hua XU Tong CHEN Linna ZHAO Xinyong GUO Qiyun LI Jiatong zhang Chenguang ZHU Kangcheng KONG yuzhong School of Ecology and Environment Tibet UniversityLhasa 850000China School of Engineering Tibet UniversityLhasa 850000China Joint Laboratory of Plateau Surface Remote Sensing Tibet UniversityLhasa 850000China

The Lhasa River Basin forms an essential human settlement area in the southern part of the Qinghai-Tibet *** study employed ecosystem service value(ESV)evaluation model,terrain gradient grading,and Geodetector to analyze land use and ESV in the Lhasa River Basin from 1985 to *** findings reveal that:(1)From 1985 to 2020,grassland was the dominant land *** was a trend of grassland reduction and the expansion of other land types.(2)ESV has increased over the research period(with a total increase of 0.84%),with higher values in the southeast and lower values in the *** contributed the most to ESV,and climate regulation and hydrological regulation were the ecosystem services that contribute the most to ESV.(3)Natural factors like NDVI and altitude,as well as economic factors like population density and distance from roads,influenced the spatial differentiation of ESV,the explanatory power of NDVI reached up to *** interaction between factors had a greater impact than individual *** research results can provide theoretical support for national spatial planning and ecological environment protection in the Lhasa River Basin and other similar areas.

关键词： Ecosystem services value Land use Terrain gradient effect Lhasa River Basin Driving factors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：