检索结果-南通市图书馆

Critical evaluation of transit policies in Lima,Peru;resilience of rail rapid transit(Metro)in a developing country

Green Energy and Intelligent Transportation 2024年第5期3卷 23-33页

作者： Manuel jose Martinez Representante Legal Instituto de Avance del Transporte Peruano EIRLCalle Schrader 179dpto.202Lima 41San BorjaLimaPeru

This paper evaluates rail transit within the context of the transit policies implemented in Lima,*** it reviews the implementation of rapid transit,and bus ***,it evaluates the outcomes of such policies by using Total Factor Productivity for policy effectiveness,Data Envelopment Analysis for rapid transit performance,and Generalized Cost of Travel for *** paper finds that implementation failed in enforcing key requirements for rail transit regarding penetration of CBD and short transfers to bus transit;and that the basic assumptions of bus reform did not hold regarding bus oversupply,bus congestion or bus *** paper also finds that outcomes of policies failed dramatically in achieving the planning goals;however,rail transit(Metro)shows high level of resilience in serving large ridership at high *** the other hand,bus reform was associated with a disproportionate increase of motorization,well over the effect of income growth or car attractiveness,and more related to the excessive reduction of bus transit capacity ill-advised from unproved bus reform *** paper recommends expanding rail rapid transit due to its intensive use of green renewable energy and its potential of demand growth if combined with modern Intelligent Transportation services,but this opportunity can be wasted without the proposed policy constraint to achieve lower Generalized Cost of Travel at any governmental intervention for bus reform,instead of just reducing bus transit capacity as ***,this paper recommends government to government contracts to build rail transit and to enforce proper planning.

关键词： Public transportation Bus rapid transit Rail transportation Bus transit Developing countries Resilient

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

Analyzing the multilevel structure of the European airport network

引用

Chinese Journal of Aeronautics 2017年第2期30卷 554-560页

作者： Oriol Lordan jose M.Sallan Department of Management Universitat Politecnica de Catalunya-BarcelonaTech Terrassa 08222 Spain

The multilayered structure of the European airport network（EAN）,composed of connections and flights between European cities,is analyzed through the k-core decomposition of the connections *** decomposition allows to identify the core,bridge and periphery layers of the *** core layer includes the best-connected cities,which include important business air traffic *** periphery layer includes cities with lesser connections,which serve low populated areas where air travel is an economic *** remaining cities form the bridge of the EAN,including important leisure travel origins and *** multilayered structure of the EAN affects network robustness,as the EAN is more robust to isolation of nodes of the core,than to the isolation of a combination of core and bridge nodes.

关键词： Air transport networks Complex networks k-core decomposition Network multilevel structure Robustness

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

CFD modelling:The most useful tool for developing mesoscale urban canopy parameterizations

引用

Building Simulation 2021年第3期14卷 407-419页

作者： Riccardo Buccolieri jose Luis Santiago Alberto Martilli Dipartimento di Scienze e Tecnologie Biologiche edAmbientali University ofSalentoS.P.6 Lecce-MonteroniLecce 73700Italy Environment Department Research Center for EnergyEnvironment and Technology(CIEMAT)Madrid 28040Spain

1 Introduction The fact that most of the world’s population lives in cities(UN-Habitat 2016)has increased interest in urban *** models,such as the Weather Research and Forecasting(WRF)model(***/weather-research-and-forecasting-model),are used to reproduce the meteorology and climatology over cities and around them,where the complex interactions between the atmosphere and urban surfaces(buildings,vegetation,urban obstacles,etc.)induce strong heterogeneity in the flow properties within the urban canopy layer(UCL)(Di Sabatino et al.2013;Lateb et al.2016;Tominaga and Stathopoulos 2016).

关键词： meteorology urban forecasting

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

The Many Faces of Plant SWI/SNF Complex

引用

Molecular Plant 2014年第3期7卷 454-458页

作者： jose C. Reyes Molecular Biology Department Centro Andaluz de Biologia Molecular y Medicina Regenerativa (CABIMER) Consejo Superior de Investigaciones Cientificas (CSIC) Av. Americo Vespucio 41092 Seville Spain

THE SWI/SNF COMPLEXESIn plants, as well as in metazoans, the execution of devel- opmental programs and the response to environmental stimuli depend on changes in gene transcription programs that require extensive chromatin modifications of basically two types： posttranslational modification of histones and ATP-dependent reorganization of histones-DNA interac- tions. Many different nuclear machineries are necessary to carry out chromatin modifications at the appropriate time and place.

关键词：

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

Design optimization of multilayer perceptron neural network by ant colony optimization applied to engine emissions data

引用

Science China(Technological Sciences) 2019年第6期62卷 1055-1064页

作者： MARTINEZ-MORALES jose QUEJ-COSGAYA Hector LAGUNAS-JIMENEZ jose PALACIOS-HERNANDEZ Elvia MORALES-SALDANA Jorge Faculty of Engineering Autonomous University of Campeche Campeche 24039 Mexico Faculty of Sciences Autonomous University of San Luis Potosi San Luis Potosi 78290 Mexico Faculty of Engineering Autonomous University of San Luis Potosi San Luis Potosi 78290 Mexico

A multilayer perceptron(MLP) artificial neural network(ANN) model has been optimized by the multi-objective ant colony optimization(MOACO) algorithm, which uses three objective functions. A sensitivity analysis to choose MOACO parameter values is carried out by calculating hypervolume metric, and the proposed approach adopts the Vlsekriterijumska Optimizacija I Kompromisno Resenje(VIKOR) decision method to choose final compromised solution on the Pareto front obtained from MOACO. As a result, we used the MLP-MOACO developed model to estimate the value of engine emissions of NOxin a four stroke, spark ignition(SI) gasoline engine and observed acceptable correlation coefficient(R^2) of 0.99978.

关键词： ant colony optimization multilayer perceptron artificial neural networks hypervolume engine emissions

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 PREDICTOR MODIFICATION TO THE EBDF METHOD FOR STIFF SYSTEMS

引用

Journal of Computational Mathematics 2011年第2期29卷 199-214页

作者： Elisabete Alberdi Juan jose Anza Lea Artibai Ikastetxea Xemein Avenue 19 48270 Markina-Xemein (Vizcaya) Spain Department of Applied Mathematics ETS de Ingenieria de Bilbao Universidad del Pais Vasco Alameda de Urquijo s/n 48013 Bilbao Spain

In this paper we modify the EBDF method using the NDFs as predictors instead of BDFs. This modification, that we call ENDF, implies the local truncation error being smaller than in the EBDF method without losing too much stability. We will also introduce two more changes, called ENBDF and EBNDF methods. In the first one, the NDF method is used as the first predictor and the BDF as the second predictor. In the EBNDF, the BDF is the first predictor and the NDF is the second one. In both modifications the local truncation error is smaller than in the EBDF. Moreover, the EBNDF method has a larger stability region than the EBDF.

关键词： Backward differentiation formula (BDF) EBDF Predictor Stability Stiff Systems.

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

Brain and spinal cord trauma:what we know about the therapeutic potential of insulin growth factor 1 gene therapy

引用

Neural Regeneration Research 2023年第2期18卷 253-257页

作者： María jose Bellini Florencia Labombarda Lab de Bioquímica del Envejecimiento INIBIOLP-CONICETFacultad de Ciencias MedicinaUniversidad Nacional de La PlataLa PlataArgentina Laboratory of Neuroendocrine Biochemistry IBYME-CONICETBuenos AiresArgentina Department of Human Biochemistry Faculty of MedicineUniversidad de Buenos AiresBuenos AiresArgentina

Although little attention has been paid to cognitive and emotional dysfunctions observed in patients after spinal co rd injury,several reports have described impairments in cognitive *** group also has contributed significantly to the study of cognitive impairments in a rat model of spinal co rd *** findings are very significant because they demonstrate that cognitive and mood deficits are not induced by lifestyle changes,drugs of abuse,and combined *** are related to changes in brain structures involved in cognition and emotion,such as the *** spinal cord injury decreases neurogenesis,enhances glial reactivity leading to hippocampal neuroinflammation,and trigge rs cognitive *** brain distal abnormalities are recently called te rtiary *** that there is no treatment for Tertiary Damage,insulin growth factor 1 gene therapy emerges as a good *** growth factor 1 gene thera py recove rs neurogenesis and induces the polarization from pro-inflammato ry towards anti-inflammatory microglial phenotypes,which represents a potential strategy to treat the neuroinflammation that supports te rtiary *** growth factor 1 gene therapy can be extended to other central nervous system pathologies such as traumatic brain injury where the neuroinflammatory component is *** growth factor 1 gene therapy could emerge as a new therapeutic strategy for treating traumatic brain injury and spinal cord injury.

关键词： cognitive impairments gene therapy hippocampus insulin growth factor 1 microglial cells neurodegeneration neurogenesis neuroinflammation spinal cord injury traumatic brain injury

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

Phenotypic plasticity in Drosophila cactophilic species the effect of competition, density, and breeding sites

引用

Insect Science 2017年第4期24卷 675-683页

作者： Juan jose Fanara Victoria Werenkraut Departamento de Ecologia Genetica y Evolucion Instituto de Ecologia GeneUca y Evolucion de Buenos Aires (CONICET-UBA) Facultad de Ciencias Exactas y Naturales Ciudad Universitaria Pabellon II Universidad de Buenos Aires Buenos Aires Laboratorio Ecotono Centro Regional Universitario Bariloche Universidad Nacional del ComahuelINIBIOMA-CONICET Quintral 1250 Bariloche Rio Negro Argentina

Changes in the environmental conditions experienced by naturally occurring populations are frequently accompanied by changes in adaptive traits allowing the organ- ism to cope with environmental unpredictability. Phenotypic plasticity is a major aspect of adaptation and it has been involved in population dynamics of interacting species. In this study, phenotypic plasticity （i,e., environmental sensitivity） of morphological adap- tive traits were analyzed in the cactophilic species Drosophila buzzatii and Drosophila koepferae （Diptera： Drosophilidae） considering the effect of crowding conditions （low and high density）, type of competition （intraspecific and interspecific competition） and cacti hosts （Opuntia and Columnar cacti）. All traits （wing length, wing width, thorax length, wing loading and wing aspect） showed significant variation for each environmental factor considered in both Drosophila species. The phenotypic plasticity pattern observed for each trait was different within and between these cactopbilic Drosophila species depending on the environmental factor analyzed suggesting that body size-related traits respond almost independently to environmental heterogeneity. The effects of ecological factors analyzed in this study are discussed in order to elucidate the causal factors investigated （type of com- petition, crowding conditions and alternative host） affecting the election of the breeding site and/or the range of distribution of these cactophilic species.

关键词： adaptation body size colonization Drosophila cactophilic species wingaspect wing loading

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

How we have learned about the complexity of physiology,pathobiology and pharmacology of bile acids and biliary secretion

引用

World Journal of Gastroenterology 2008年第37期14卷 5617-5619页

作者： jose JG Marin Laboratory of Experimental Hepatology and Drug Targeting CIBERehd University of SalamancaSalamanca 37007 Spain

During the last decades the concept of bile secretion as merely a way to add detergent components to the intestinal mixture to facilitate fat digestion/absorption and to eliminate side products of heine metabolism has evolved considerably. In the series of mini-reviews that the World Journal of Gastroenterology is to publish in its section of ＂Highlight Topics＇; we will intend to give a brief but updated overview of our knowledge in this field. This introductory letter is intended to thank all scientists who have contributed to the development of this area of knowledge in gastroenterology.

关键词： Bile flow Cholestasis Hepatocyte Liver Transport

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

Transient Charge Trapping in Eu^(3+)-Doped Nanocomposites by Ultrafast Laser Excitation

引用

Journal of Rare Earths 2006年第6期24卷 663-667页

作者： Sergie Lysenko jose Jimenez Valentin Vikhnin Department of Physics University of Puerto Rico Mayaguez PR 00681USA

Eu^3＋ was incorporated as probe ions into nanocomposite glasses, such as metal silver doped phosphate glass and crystalline nanocomposites Si-enriched SiO2 glass. Luminescence studies show that the doped europium ions are present as trivalent Eu^3＋ , and are distributed in the matrix on the boundary surface of nanoparticles. The valence switching from Eu^3＋ to Eu^2＋ was observed in Si-SiO2 nanocomposites when ultrafast laser excitation was applied. In silver metal nan-oparticles embedded aluminophosphate glass, a time-resolved ultrafast degenerate-four-wave-mixing （DFWM） experiment shows enhanced third-order nonlinearity at zero-delay time, followed by a bell-like signal buildup. It is attributed to the creation of electronic polaron and vibronic Wannier-Mott exciton （WME）. In europium codoped sample, however, the bell-like signal is depressed. All the above observations are interpreted as the result of a strong Coulomb interaction between conduction electrons produced inside the nanoparticles by laser excitation and Eu^3＋ ions residing near the surface. The trivalent europium ions play the role as positive boundary charges attracting electrons. This results in temporary formation of Eu^2＋ , and blocks the resonant tunneling transition in the silver-glass system to avoid creating large radius polaron.

关键词： nanocomposite europium ultrafast excitation rare earths

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：