检索结果-南通市图书馆

A DeSIGN FOR eNVIRONMeNT MeTHODOLOGY FOR eVALUATION AND IMPROveMeNT OF DeRIVATIve CONSUMeR eLeCTRONIC PRODUCT DeveLOPMeNT

引用

Journal of Systems Science and Systems engineering 2011年第3期20卷 260-274页

作者： Tzu-An CHIANG Z.H.che Tung-Te WANG Department of Business Administration National Taipei College of Business Department of Industrial engineering & Management National Taipei University of Technology

Increasing environmental awareness and stringent environmental regulations have motivated many companies to incorporate ecodesign into product development. To assist companies to address the challenge, this research presents a design for environment （Dfe） methodology to evaluate and improve derivative consumer electronic product development using a back-propagation neural network （BPNN） model and a technique for order preference by similarity to ideal solution （TOPSIS） method. Based on use of a BPNN, the life cycle assessment （LCA） models are developed to estimate quantities of hazardous chemical substances and energy consumption for a derivative consumer electronic product throughout the product life cycle. A performance evaluation and improvement model for Dfe is then devised based on the TOPSIS method to analyze the ecodesign performance and provide concrete improvement strategies. With the aforementioned analysis of environmental performance, an enterprise can profoundly understand and significantly enhance the relative Dfe performance of a new product compared to the similar competitive products. Finally, we apply an optical mouse development project as a case to elaborate and demonstrate the effectiveness of the proposed methodology. These analytical results can let us understand the Dfe performance ranking and acquire the maximum reduced quantity of each Dfe criterion for each module of a new product. Meanwhile, to enhance the green competitiveness of the new product, we recommend that the engineers should decrease the area of the circuit board of the new product. In addition, the material of the USB cable for the new product should be switched from the PVC material to the Pe material.

关键词： Back-propagation neural network TOPSIS design for environment ecodesign product development

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

Machine learning model for snow depth estimation using a multisensory ubiquitous platform

引用

Journal of Mountain Science 2022年第9期19卷 2506-2527页

作者： Sofeem NASIM Mourad OUSSALAH Björn KLÖve Ali Torabi HAGHIGHI Department of Computer Science and engineering University of OuluOulu 90570Finland Water Energy and Environmental EngineeringUniversity of OuluOulu 90570Finland

Snow depth estimation is an important parameter that guides several hydrological applications and climate change *** advances in remote sensing technology and enhanced satellite observations,the estimation of snow depth at local scale still requires improved accuracy and *** advances in ubiquitous and wearable technology promote new prospects in tackling this *** this paper,a wearable IoT platform that exploits pressure and acoustic sensor readings to estimate and classify snow depth classes using some machine-learning models have been put ***,the results of Random Forest classifier showed an accuracy of 94%,indicating a promising alternative in snow depth measurement compared to in situ,LiDAR,or expensive large-scale wireless sensor network,which may foster the development of further affordable ecological monitoring systems based on cheap ubiquitous sensors.

关键词： Snow depth Wearable technology Machine learning Random forest classifier

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 Dynamic Simulation of Land use and ecological Risk in the Yangtze River Delta Urban Agglomeration,China

引用

Chinese Geographical Science 2021年第5期31卷 829-847页

作者： WANG Xiao che Lei ZHOU Liang XU Jiangang School of Architecture and Urban Planning Nanjing UniversityNanjing 210093China Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhou 730070China Institute of Geographic Sciences and Natural Resourcs Research.Chinese Academy of Ssciences Beijing 100101China

Rapid urbanization leads to dramatic changes in land use patterns,and the land use/cover change(LUCC)can reflect the spatial impact of urbanization on the ecological *** the process of LUCC and predicting the ecological risk future changes can provide supports for urban ecological *** the Yangtze River Delta Urban Agglomeration(YRDUA),China as the study area,four developmental scenarios were set on the basis of the land use data from 2005 to *** temporal land use changes were predicted by the integration of the system dynamic and the future land use simulation(SD-FLUS)model,and the geographically weighted regression(GWR)model was used to identify the spatial heterogeneity and evolution characteristics between ecological risk index(eRI)and socio-economic driving *** showed that:1)From 2005 to 2015,the expansion of construction land(7670.24 km^(2))mainly came from the occupation of cultivated land(7854.22 km2).The Kappa coefficient of the SD-FLUS model was 0.886,indicating that this model could be used to predict the future land use changes in the YRDUA.2)Gross domestic production(GDP)and population density(POP)showed a positive effect on the eRI,and the impact of POP exceeded that of *** eRI showed the characteristics of zonal diffusion and a slight upward trend,and the high ecological risk region increased by 6.09%,with the largest increase.3)Under different developmental scenarios,the land use and ecological risk patterns *** construction land is increased by 5.76%,7.41%,5.25%and 6.06%,*** the high ecological risk region accounted for 12.71%,15.06%,11.89%,and 12.94%,*** Scenario D,the structure of land use and ecological risk pattern was better compared with other scenarios considering the needs of rapid economic and ecological *** study is helpful to understand the spatio-temporal pattern and demand of land use types,grasp the ecological security pattern of large-sc

关键词： urbanization ecological risk scenario simulation geographically weighted regression(GWR) spatial 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

Issues and challenges in diabetic neuropathy management:A narrative review

引用

World Journal of Diabetes 2023年第6期14卷 741-757页

作者： che Aishah Nazariah Ismail Department of Physiology School of Medical SciencesUniversity Sains Malaysia Health CampusKubang Kerian 16150KelantanMalaysia

Diabetic neuropathy(DN)is a devastating disorder with an increasing prevalence *** epidemic can pose a critical burden on individuals and communities,subsequently affecting the productivity and economic output of a *** more people living a sedentary lifestyle,the incidence of DN is escalating *** researchers have relentlessly worked on ways to combat this devastating *** efforts have given rise to a number of commercially available therapies that can alleviate the symptoms of ***,most of these therapies are only partially *** still,some are associated with unfavorable side *** narrative review aims to highlight current issues and challenges in the management of DN,especially from the perspective of molecular mechanisms that lead to its progression,with the hope of providing future direction in the management of *** improve the approaches to diabetic management,the suggested resolutions in the literature are also discussed in this *** review will provide an in-depth understanding of the causative mechanisms of DN,apart from the insights to improve the quality and strategic approaches to DN management.

关键词： Diabetic neuropathy Pathophysiology Diabetic management Diabetic medication

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

Automatic global path generation for large-scale 3D scene exploration

引用

International Journal of Modeling, Simulation, and Scientific Computing 2020年第6期11卷 45-77页

作者： Li che F.J.Kang Army Aviation Institute Beijing 100123P.R.China School of Marine Science and Technology Northwestern Polytechnical University Xi’an 710072 P.R.China

Large-scale virtual scene exploration is still a challenging task. The novice users caneasily get distracted and disorientated, which results in being lost in space. Assistedcamera control technology is the most effective solution for virtual environment exploration problems which requires viewpoint computation and path planning. In this paper,a novel approach for large-scale virtual scene based on viewpoint scoring is ***, the scene was adaptively divided into several meaningful and easily analyzedsubregions according to the optimal view distance criterion. Second, a novel viewpointscoring method based on visual perception and information entropy fusion was developed for optimal viewpoint determination and greedy N-Best viewpoint selection algorithm was utilized for visual perceptibility calculation. Then evolutionary programmingapproach for the Traveling Salesman problem was applied for intra-subregion and intersubregion exploring path optimization. Finally, the Cubic Hermite Curve was introduced to smoothen the inflection point on the exploration path. The experimental resultsdemonstrate that the proposed method can effectively generate an automatic smooth,informative, aesthetic and non-intersecting path, with the characteristics of good exploring comfort, strong immersion and high scene information perception.

关键词： Automatic exploration visual perception viewpoint scoring N-Best viewpoint path optimization large-scale virtual scene

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

Distr ibution, risk and bioavailability of metals in sediments of Lake Yamdrok Basin on the Tibetan Plateau, China

引用

Journal of environmental Sciences 2020年第11期32卷 169-179页

作者： Feifei che Junyi chen Bo Zhang Xia Jiang Shuhang Wang National engineering Laboratory for Lake Pollution Control and ecological Restoration Chinese Research Academy of Environmental SciencesBeijing l00012China

Total contents of metals in soil and sediments on the Tibetan Plateau of China have been widely analyzed,but existing information is insufficient to effectively evaluate metal ecological risk because of a lack of metal bioavailability *** this study,distribution,potential risk,mobility and bioavailability of metals in sediments of Lake Yamdrok Basin in Tibet of China were explored by combined use of total digestion,sequential extraction and the diffusive gradient in thin-films(DGT).Average concentrations of Cr,Ni,Cu,Zn,As,Cd and Pb in surface sediments were 31.25,30.31,22.00,45.04,31.32,0.13 and 13.39 mg/kg,*** levels of metals were found near the inflowing *** form was dominant in Cr,Ni,Zn,Cd and Pb,and reducible form was dominant in As and *** in surface sediments showed a low enrichment degree overall,but Cd and As had higher ecological risk levels than the other ***,there was a larger average proportion of exchangeable form of As(20.4%)and Cd(9.0%)than the other metals(1.7%-3.3%),implying their higher mobility and release *** DGT-labile concentrations of Cr,Ni,Cu,Zn,As,Cd and Pb were 0.5,4.5,0.7,25.1,60.0,0.22 and 1.0μg/L,*** DGT-labile As was significantly correlated with extractable As forms(pesting that extractable As in sediments acts as a"mobile pool"for bioavailable *** results suggest potential risks of As and Cd,especially As,deserve further attention in Lake Yamdrok Basin.

关键词： Sequential extraction the Diffusive gradients in thin films(DGT) Mobility Geochemical baseline Tibet

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

Time-frequency response spectrum of rotational ground motion and its application

引用

earthquake Science 2010年第1期23卷 71-77页

作者： Wei che Qifeng Luo School of engineering & Technology China University ofGeosciences Beij'ing 100083 China Shanghai Institute of Disaster Prevention andRelief Tongji University Shanghai 200092 China

The rotational seismic motions are estimated from one station records of the 1999 Jiji （Chi-Chi）, Taiwan, earthquake based on the theory of elastic plane wave propagation. The time-frequency response spectrum （TFRS） of the rotational motions is calculated and its characteristics are analyzed, then the TFRS is applied to analyze the damage mechanism of one twelve-storey frame concrete structure. The results show that one of the ground motion components can not reflect the characteristics of the seismic motions completely; the characteristics of each component, especially rotational motions, need to be studied. The damage line of the structure and TFRS of ground motion are important for seismic design, only the TFRS of input seismic wave is suitable, the structure design is reliable.

关键词： Jiji (Chi-Chi) earthquake ground motion rotational component time-frequency response spectrum damage line

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

Molecular mechanisms of plant adaptation to acid soils: A review

引用

Pedosphere 2023年第1期33卷 14-22页

作者： Jing che Xue Qiang ZHAO Ren Fang SHeN State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

Acid soils are widespread and limit global plant ***(Al)/manganese(Mn)toxicity and phosphorus(P)deficiency are the major limiting factors affecting plant growth and productivity on acid ***,however,have evolved various strategies to adapt to these *** strategies include using both external and internal mechanisms to adapt to Al toxicity,regulating Mn uptake,translocation,and distribution to avoid Mn toxicity,and orchestrating a set of P transport mechanisms to efficiently take up P from the ***,we review the current state of knowledge about the molecular mechanisms of plant adaptation to these constraints in acid soils,focusing on the roles of transporters involved in Al/Mn tolerance and P *** manipulation combined with other biotechnology will contribute to the development of novel strategies to improve plant adaptation to acid *** molecular mechanisms of plant coadaptation to multiple stresses in acid soils are largely unknown and require further investigation.

关键词： aluminum toxicity gene manipulation,manganese toxicity multiple stresses phosphorus deficiency transporter

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

Self‑Assembly MXene‑rGO/CoNi Film with Massive Continuous Heterointerfaces and enhanced Magnetic Coupling for Superior Microwave Absorber

引用

Nano-Micro Letters 2022年第5期14卷 20-33页

作者： Xiao Li Zhengchen Wu Wenbin You Liting Yang Renchao che Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200438People’s Republic of China

MXene, as a rising star of two-dimensional(2 D) materials, has been widely applied in fields of microwave absorption and electromagnetic shielding to cope with the arrival of the 5 G era. However, challenges arise due to the excessively high permittivity and the difficulty of surface modification of few-layered MXenes severely, which infect the microwave absorption performance. Herein, for the first time, a carefully designed and optimized electrostatic selfassembly strategy to fabricate magnetized MXene-r GO/Co Ni film was reported. Inside the synthesized composite film, r GO nanosheets decorated with highly dispersed Co Ni nanoparticles are interclacted into MXene layers, which effectively suppresses the originally self-restacked of MXene nanosheets, resulting in a reduction of high permittivity. In addition, owing to the strong magnetic coupling between the magnetic Fe Co alloy nanoparticles on the r GO substrate, the entire MXener GO/Co Ni film exhibits a strong magnetic loss capability. Moreover, the local dielectric polarized fields exist at the continuous heterointerfaces between 2 D MXene and r GO further improve the capacity of microwave loss. Hence, the synthesized composite film exhibits excellent microwave absorption property with a maximum reflection loss value of-54.1 d B at 13.28 GHz. The electromagnetic synergy strategy is expected to guide future exploration of high-efficiency MXene-based microwave absorption materials.

关键词： MXene Microwave absorption Composite materials Graphene electron holography

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

Influence of alumina abrasive tool wear on ground surface characteristics and corrosion properties of K444 nickel-based superalloy

引用

Chinese Journal of Aeronautics 2022年第6期35卷 339-351页

作者： Min LI Jingfei YIN Linbo che Wenfeng DING Jiuhua XU National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China

K444 nickel-based superalloy is an important material to manufacture the gas turbine due to its excellent mechanical properties at high temperatures and corrosion ***,grinding is the mostly used method for the surface finish of the K444 alloy ***,few studies worked on the effects of the abrasive tool wear on the ground surface characteristics and corrosion properties of K444 *** study uses two different-type alumina abrasive tools,i.e.,white alumina(WA)and microcrystalline alumina(MA)wheels,to grind the K444 *** influence of the alumina abrasive tool wear on ground surface characteristics and corrosion resistance performance are *** is discovered that the MA wheel presents a slighter wheel wear and higher self-sharpening than the WA *** to the WA wheel,the MA wheel has less material adhesion,which leads to a better surface *** the corrosion testing,the maximum corrosion depth is 80μm in the surface ground by the MA wheel but 100μm in the surface ground by the WA wheel,which demonstrates that the MA wheel grinding benefits the surface corrosion resistance of K444 ***,this study could provide a guide to selecting the abrasive tools and optimizing the grinding process of the K444 alloy.

关键词： Abrasive wheel wear Corrosion resistance Grinding K444 nickel-based superalloy Microcrystalline alumina

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：