检索结果-南通市图书馆

MOF-based materials facilitate efficient anaerobic digestion of organic wastes:integrating substrate bioavailability and microbial syntrophism

引用

Frontiers of Environmental Science & Engineering 2024年第8期18卷 153-157页

作者： Haoyu Liu Ying xu xiang Chen Xiankai Wang Hang Wang Xiaohu dai State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China YANGTZE Eco-Environment Engineering Research Center China Three Gorges CorporationWuhan 430010China National Engineering Research Center of Eco-Environment Protection for Yangtze River Economic Belt Wuhan 430010China

Anaerobic digestion(AD)of organic waste(OW)for methane production is generally *** of AD systems with traditional materials(e.g.,electroconductive materials)is a current focus of research and has been reported to assist methanogenesis by enhancing the productivity of microbial metabolism among syntrophic *** in the AD of organic wastewater,in which microbial cells come into direct contact with the dissolved substrate,in the complex multiphase AD system of OW,low substrate bioavailability is an inevitable obstacle to microbial syntrophism for ***,we propose that improving substrate bioavailability and microbial syntrophism is a powerful strategy for ensuring material-assisted efficient AD of *** on the above considerations,metal-organic frameworks(MOFs),with their exceptionally high porosity,outstanding multi-functionality,and tuneable structures,have excellent potential for application in multiphase anaerobic systems of OW to integrate substrate bioavailability and microbial syntrophism and drive efficient *** addition,MOFs with designable and tuneable natures have great potential for use in identifying suitable materials for anaerobic systems for different types of OW via machine-learning technologies,thereby effectively enhancing methanogenesis from ***,the sustainable application of MOFs in AD and the corresponding environmental risks warrant further investigation.

关键词： Anaerobic digestion Methane production Biodegradability Functional materials Metal-organic frameworks

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

Nickel-based metal-organic framework-derived whisker-shaped nickel phyllosilicate toward efficiently enhanced mechanical,flammable and tribological properties of epoxy nanocomposites

引用

Frontiers of Chemical Science and Engineering 2022年第10期16卷 1493-1504页

作者： Yuxuan xu Guanglong dai Shibin Nie Jinian Yang Song Liu Hong Zhang xiang Dong School of Safety Science and Engineering State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal MinesAnhui University of Science and TechnologyHuainan 232001China School of Materials Science and Engineering State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal MinesAnhui University of Science and TechnologyHuainan 232001China

Metal−organic framework-derived materials have attracted significant attention in the applications of functional *** this work,the rod-like nickel-based metal−organic frameworks were first synthesized and subsequently employed as the hard templates and nickel sources to prepare the whisker-shaped nickel phyllosilicate using a facile hydrothermal ***,the nickel phyllosilicate whiskers were evaluated to enhance the mechanical,thermal,flammable,and tribological properties of epoxy *** results show that adequate nickel phyllosilicate whiskers can disperse well in the matrix,improving the tensile strength and elastic modulus by 13.6%and 56.4%,*** the addition of nickel phyllosilicate whiskers could not obtain any UL-94 ratings,it enhanced the difficulty in burning the resulted epoxy resin nanocomposites and considerably enhanced thermal ***,it was demonstrated that such nickel phyllosilicate whiskers preferred to improve the wear resistance instead of the antifriction ***,the wear rate of epoxy resin nanocomposites was reduced significantly by 80%for pure epoxy resin by adding 1 phr *** as-prepared nickel phyllosilicate whiskers proved to be promising reinforcements in preparing of high-performance epoxy resin nanocomposites.

关键词： metal−organic framework nickel phyllosilicate whisker epoxy resin mechanical response tribological performance flammable property

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

Secrets of high thermal emission of transition metal disilicides TMSi_(2)(TM=Ta,Mo)

引用

Journal of Materials Science & Technology 2021年第30期89卷 114-121页

作者： Huimin xiang Fuzhi dai Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China

TMSi_(2)(TM=Ta,Mo)are extensively used as thermal emissivity agents in high emission coatings due to their well-known"high"emissivity in infrared ***,there is a paucity of the high temperature(HT)emissivity property of these two ***,room temperature(RT)spectrometer measurements have demonstrated that the emittance in infrared range of two silicides was considerably ***,providing critical HT data and satisfactory elucidation on the emission incompatibility of TMSi_(2)is eagerly *** this contribution,combining first principles calculations and Drude model,the reflectance spectra of TMSi_(2)were predicted at both RT and *** with spectrometer measurements,the intrinsic emittance of silicides was relatively low in the entire investigated *** explain the incompatible emission behavior,two simplified models including the majority of high emissivity coating,SiO_(2),were ***,with SiO_(2)considered in simulations,no matter covered on the surface or blended in the composites,the emittance of the TMSi_(2)enhanced *** theoretical results demonstrate the non-negligible significance of oxides on the high temperature performance of silicides and provide the guidelines for improving the emission performance of silicides and searching for potential high emissivity agents.

关键词： Disilicide Optical properties Thermal emission First-principles calculations Drude model

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

Electromagnetic wave absorbing properties of TMCs(TM=Ti,Zr,Hf,Nb and Ta)and high entropy(Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C

引用

Journal of Materials Science & Technology 2021年第15期74卷 105-118页

作者： Yanchun Zhou Biao Zhao Heng Chen Huimin xiang Fu-Zi dai Shijiang Wu Wei xu Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing100076China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou450046China Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin300072China Zibo Firstar New Material Incoqjorated Co.Ltd. Zibo255000China Shanghai Chenhua Science and Technology Coloration Ltd. Shanghai201804China

Electromagnetic wave(EMW)absorbing materials play a vital role in modern communication and information processing technologies to inhibit information leakage and prevent possible damages to environment and human ***,most of EMW absorbing materials are either composites of two or more phases or in the form of nanosheets,nanowires or nanofibers in order to enhance the EMW absorption performance through dielectric loss,magnetic loss and dielectric/magnetic loss ***,the combination of complex shapes/multi phases and nanosizes may compound the difficulties of materials processing,composition and interfaces control as well as performance maintenance during ***,searching for single phase materials with good stability and superior EMW absorbing properties is *** achieve this goal,the EMW absorbing properties of transition metal carbides TMCs(TM=Ti,Zr,Hf,Nb and Ta)and high entropy(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C which belong to ultrahigh temperature ceramics,were investigated in this *** to the good electrical conductivity and splitting of d orbitals into lower energy t2glevel and higher energy eglevel in TMC6octahedral arrangement,TMCs(TM=Ti,Zr,Hf,Nb and Ta)exhibit good EMW absorbing ***,Hf C and Ta C exhibit superior EMW absorbing *** minimum reflection loss(RLmin)value of Hf C is-55.8 d B at 6.0 GHz with the thickness of 3.8 mm and the effective absorption bandwidth(E_(AB))is 6.0 GHz from 12.0 to 18.0 GHz at thickness of 1.9 mm;the RL_(minvalue)of Ta C reaches-41.1 d B at 16.2 GHz with a thickness of 2.0 mm and the EABis 6.1 GHz with a thickness of 2.2 ***,the electromagnetic parameters,i.e.,complex permittivity and permeability are tunable by forming single phase solid solution or high entropy(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))*** R_(Lminvalue)of high entropy(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))C is-38.5 d B at 9.5 GHz with the thickness of 1.9 mm,and the EA

关键词： Transition metal carbides High entropy ceramics Microwave absorption Electromagnetic parameters Electronic structure Crystal field theory

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

Microstructure design of advanced magnesium-air battery anodes

引用

Journal of Magnesium and Alloys 2024年第2期12卷 443-464页

作者： xu Huang Qingwei dai Qing xiang Na Yang Gaopeng Zhang Ao Shen Wanming Li School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang 550025China School of Material and Metallurgy University of Science and Technology LiaoningAnshan 114051China

Metal-air battery is an environmental friendly energy storage system with unique open ***(Mg)and its alloys have been extensively attempted as anodes for air batteries due to high theoretical energy density,low cost,and ***,the study on Mg-air battery(MAB)is still at the laboratory level currently,mainly owing to the low anodic efficiency caused by the poor corrosion *** order to reduce corrosion losses and achieve optimal utilization efficiency of Mg anode,the design strategies are reviewed from microstructure ***,the corrosion behaviors have been discussed,especially the negative difference effect derived by hydrogen *** attention is given to the effect of anode micro-structures on the MAB,which includes grain size,grain orientation,second phases,crystal structure,twins,and *** further improvement,the discharge performance,long period stacking ordered phase and its enhancing effect are ***,given the current debates over Mg dendrites,the potential risk,the impact on discharge,and the elimination strategies are *** control and single crystal would be promising ways for MAB anode.

关键词： Magnesium Air battery Anode Microstructure Anodic efficiency

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

Fair multigroup multicast precoding design based on traffic demands for multibeam satellite systems

引用

Chinese Journal of Aeronautics 2023年第10期36卷 366-374页

作者： Zhiqi dai Zhen xu School of Electronic and Information Engineering Beihang UniversityBeijing 100191China

Onboard resources are limited for multibeam satellite communication systems,while differences exist in traffic demands among *** conventional multigroup multicast precoding methods do not take traffic demands for users into consideration,it is difficult to flexibly adjust the offered throughput to users’*** with higher demand may obtain lower throughput while users with lower demand may be over-satisfied,which results in the requested-offered throughput mismatch and resource *** paper proposes a fair multigroup multicast precoding design based on traffic *** obtain the precoding design,the optimization problem aimed at maximizing the minimum throughput satisfaction ratio,which is defined as the ratio of the offered throughput to the traffic demand,is formulated,so as to provide fair service for all users while satisfying per-feed power constraints and traffic demand *** address this problem,an auxiliary variable is first introduced to equivalently simplify ***,the semidefinite relaxation and the bisection search strategies are adopted to further handle the ***,the optimal precoding vectors are obtained by employing eigenvalue decomposition or Gaussian *** results indicate the effectiveness of the proposed precoding algorithm and demonstrate that it can better adapt to the scenarios with different traffic demands.

关键词： Satellite communication systems Multigroup multicast precoding Traffic demand Throughput satisfaction ratio Fairness optimization

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

三甲医院和社区孤独症谱系障碍早期筛查的结果比较

引用

中国儿童保健杂志 2018年第4期26卷 372-375页

作者：郭翠华罗美芳王旭祥戴美霞静进中山大学公共卫生学院妇幼卫生系广东广州510080

目的对三甲医院和社区常规保健幼儿进行孤独症谱系障碍筛查,探讨两者在接诊流程及结局上的差异,为今后开展筛查工作提供线索。方法 7 381名16~30月龄的儿童参与了孤独症谱系障碍筛查,其中三甲医院4 930人,社区2 451人。采用1∶1倾向评... 详细信息

目的对三甲医院和社区常规保健幼儿进行孤独症谱系障碍筛查,探讨两者在接诊流程及结局上的差异,为今后开展筛查工作提供线索。方法 7 381名16~30月龄的儿童参与了孤独症谱系障碍筛查,其中三甲医院4 930人,社区2 451人。采用1∶1倾向评分匹配方法得到一般信息均衡的2 451对儿童,比较三甲医院和社区的筛查及诊断结果。结果匹配后,三甲医院的初筛阳性率(17.7%)及后续访谈阳性率(42.5%)均高于社区(8.2%和2.8%)(P<0.001);诊断失访率(11.7%)显著低于社区(47.0%)(P<0.001)。两组样本的后续访谈失访率接近(49.2%vs 47.0%)(P=0.611)。结论三甲医院和社区的筛查假阳性率均偏高,仍需提高应答准确率及重视后续访谈。相比三甲医院,社区失访儿童更容易面临延误诊疗的风险,建立主动监测、转诊及随访体系有助于促进基层医疗机构的早期筛查和诊断。

关键词：孤独症谱系障碍早期筛查三甲医院社区

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 NOTE ON THE NONLINEAR CONJUGATE GRADIENT METHOD

引用

Journal of Computational Mathematics 2002年第6期20卷 575-582页

作者： dai, Yu-hong Yuan, Ya-xiang Chinese Acad Sci Acad Math & Syst Sci Inst Computat Math & Sci Engn Comput State Key Lab Sci & Engn Comput Beijing 100080 Peoples R China

Discusses several aspects of the linear conjugate gradient method for unconstrained optimization problems. General condition concerning the scalar; Convergence of the famous Fletcher-Reeves and Polak-Ribiere-Polyak co... 详细信息

关键词： unconstrained optimization conjugate gradient line search global convergence

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

COLLABORATIVE DESIGN OF RFID SYSTEMS FOR MULTI-PURPOSE SUPPLY CHAIN APPLICATIONS

引用

Journal of Systems Science and Systems Engineering 2013年第2期22卷 152-170页

作者： Hongyan dai Jing xu School of Business Central University of Finance and Economics Department of Industrial Engineering Tsinghua University

One of the key challenges for implementing RFID systems in supply chain management is the difficulty in economic justification. Such difficulty is further amplified by its public participation nature as multiple self-interest beneficiaries may receive diverse paybacks, and their incentives to join the system are difficult to align. This paper aims to address these problems by a collaborative design from two aspects. First, we propose to introduce a centralized planning mechanism in the chain to facilitate the participation, so that the cost of the overall system can be minimized. Second, we propose to analyze the multi-facet economic return from multi-purpose applications to achieve the full potential of RFID systems. To illustrate our approach, its application for inventory inaccuracy and product recall in RFID system is presented.

关键词： RFID collaborative design economic justification centralized planning

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

“新工科”背景下重塑应用型高校实践教学体系的研究与探索

引用

科技风 2025年第1期 34-36页

作者：王旭戴佳洪许宜申苏州城市学院江苏苏州215000

“新工科”背景下,应用型高校人才培养目标是培养有坚定理想信念、扎实专业素养、广阔国际视野、远大志向的卓越工程人才。本研究针对目前应用型高校长期忽视实践教学环节和能力培养过程,且实践教学体系出现产教脱节,导致学生缺乏创造... 详细信息

“新工科”背景下,应用型高校人才培养目标是培养有坚定理想信念、扎实专业素养、广阔国际视野、远大志向的卓越工程人才。本研究针对目前应用型高校长期忽视实践教学环节和能力培养过程,且实践教学体系出现产教脱节,导致学生缺乏创造意识和创造能力,难以与社会产业转型升级需求相匹配等问题,探索重塑以实践课程为主体、科创项目和创新竞赛为两翼的“一体两翼”的立体式实践教学体系,并打造实践教学支撑平台,建设科教融合的大学生主题创新平台和产教融合协同育人平台,助力“新工科”人才培养,为加快培养适应社会和产业新需求的卓越工程科技人才做出贡献。

关键词：新工科实践教学科教产融合

来源：

维普期刊数据库博看期刊

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：