衡阳市发展第三方物流SWOT分析与对策研究

结合衡阳市的发展现状,应用SWOT分析技术对衡阳市发展第三方物流的优势、劣势、机会与挑战进行了系统分析,并在此基础上,提出了衡阳市发展第三方物流的相关对策建议.表1,参4.     

高校市场废弃物物流发展问题探析

高校市场中存在着废弃物物流活动,需要从学校、环境、社会等角度对其废弃物物流体系进行改进,创建高校市场废弃物绿色物流回收系统．通过分析高校市场废弃物物流现状和存在问题,从学校、企业和政府等方面提出创建高校市场废弃物物流回收系统的诸多措施．图1,参5．     

天津滨海新区物流对环境的影响

天津滨海新区已纳入国家发展总体战略,将建设成为北方国际航运中心和国际物流中心。介绍了天津滨海新区物流业的发展现状;然后从主要货物、运输工具及物流环节3个方面分析了现代物流对滨海新区自然环境和新区附近海洋生态环境的不良影响,其中煤炭、原油、船舶、车辆等已对新区环境造成了不同程度的污染,而化学危险品、溢油与泄漏事故对新区环境存在着潜在威胁;最后针对以上分析给出了相应的解决对策和措施。     

提高农业更可持续性：趋势和挑战

第八次国际高级研讨会确定了许多支持全球可持续消费与生产的手段．比本文更全面深入的一份文件作为背景文件提交给了题为“可持续农业：让几十亿人吃饱”的分组会议．随后。分组会议成员的稿件和讨论期间的意见都被收编在一起．文件突出了制定和采用更佳管理方法（BMPs）的优点．棉花的例子说明了采用提高物流可持续性的BMPs的潜力．     

清洁生产理论基础

重点分析了清洁生产的物流基础、价值基础、经济基础,并与末端治理对比,从而论证了清洁生产是实现经济效益和环境效益的最佳模式,是实现可持续发展的必然选择。     

京津冀城市群生态系统服务价值的时空动态演变

以京津冀城市群为研究区,基于土地利用现状数据及谢高地2008年修正的"中国生态系统单位面积生态服务价值当量",利用县域尺度的粮食单产对单位面积农田食物生产服务价值进行修正,随后基于格网分析方法改进了生态系统服务价值系数的3种时空调节因子,并利用等量分类与热点分析方法探讨了生态系统服务价值的空间异质性,在此基础上,将斑块密度与聚合度指数、动态度、变化轨迹分析等方法相结合,从全局与局部揭示生态系统服务价值从2005—2015年的空间动态演变特征。结果表明,(1)修正后的方法能够反映生态系统服务价值在格网尺度上的空间异质性。京津冀城市群北部、太行山及燕山等山林地区、环渤海湿地、白洋淀及衡水湖等内陆湖泊地区的生态服务价值等级以Ⅳ、Ⅴ类为主,是生态服务价值的热点区域;平原地区及张家口市等高原地区的生态服务价值等级以Ⅰ、Ⅱ类为主,是生态服务价值的冷点区域。(2)从2005—2010年,第Ⅰ、Ⅱ、Ⅴ类的PD动态度均为正值(0.020、0042、0.029),AI动态度均为负值(-0.007、-0.046、-0.025),第Ⅲ、Ⅳ类的PD动态度为负值(-0.015、-0.014),AI动态度均为正值(0.027、0.022);从2010—2015年,Ⅰ、Ⅱ、Ⅲ、Ⅴ类的PD、AI动态度(-0.002、-0.003、0.002、-0.002,0.001、0.002、-0.003、0.002)的正负性与前5年相反,且绝对值较小;Ⅳ类的两种指数动态度均为0。(3)生态服务价值的第Ⅰ、Ⅱ类的变化区域集中分布在平原与张家口市,第Ⅲ类的变化区域集中分布在平原与山地丘陵的交界处以及邯郸市;第Ⅲ、Ⅲ类的变化区域分别分布于山地丘陵的西部与承德市东部。     

LnSrCoO4对CO和C3H8的氧化性能

采用聚乙二醇凝胶法制备LnSrCoO4(Ln=La,Sm)复合氧化物,考察了其对CO和C3H8的氧化反应活性,并运用XRD,BET,TEM和TPD等方法对其进行了表征．结果表明：该类复合氧化物具有四方K2NiF。结构,对CO和C3H8的氧化反应具有不同的催化活性,而LaSrCo04催化活性更好．     

提高农业更可持续性:趋势和挑战

第八次国际高级研讨会确定了许多支持全球可持续消费与生产的手段.比本文更全面深入的一份文件作为背景文件提交给了题为"可持续农业:让几十亿人吃饱"的分组会议.随后,分组会议成员的稿件和讨论期间的意见都被收编在一起.文件突出了制定和采用更佳管理方法(BMPs)的优点.棉花的例子说明了采用提高物流可持续性的BMPs的潜力.     

青岛城市公园灰尘重金属的形态分布及健康风险评价

对青岛市南、市北、四方和李沧四区的公园灰尘样品的重金属全量和形态分布进行分析,并对公园灰尘重金属的污染状况进行了健康风险评价。结果表明：青岛城市公园土壤和灰尘均在不同程度上受到Cu、Zn、Pb、cd的污染,李沧区4种重金属含量均在四区最高。市南区公园灰尘中的Cu、Pb、cd的含量最低,市北区的Zn含量最低;Cu主要以有...     

巢湖鱼产潜力估算及合理开发利用的一些建议

本文以一些调查资料为基础,试图揭示食物链网中能流和物流主要途径,在此基础上再估算主要饵料生物生产力,对相应鱼的供饵潜力和鱼产潜力,据此对照现有渔业利用及环境污染现状提出合理利用及保护该湖的一些建议。     

Reverse logistics in the Chinese auto-parts firms: implementation framework development through multiple case studies

In recent years, the implementation of reverse logistics (RL) in automobile manufacturing has drawn extensive interest from the Chinese government that has launched relevant take-back and environmental regulations and pilot projects. This study focuses on RL implementation issues in Chinese auto-parts manufacturing sector. Based on comprehensive literature review and multiple case studies in the Chinese auto-parts firms, this paper proposes a conceptual RL framework and highlights the major implementation issues. The purpose of this paper is to draw an overall picture of RL in the Chinese context, highlighting implementation issues in the auto-parts sector. Our study suggests that Chinese RL implementation requires close government monitoring mechanism and incentives, top management commitment within firms, technology and human capabilities support.     

Factors for implementing end-of-life product reverse logistics in the Chinese manufacturing sector

Dedicated, skilled and relatively cheap manpower coupled with efficient manufacturing techniques has elevated China’s status as the world’s factory. China is now capable of producing virtually any product, from cheap toys to some of the most sophisticated goods and equipment. The resultant economic benefits and associated enormous consumption due to rise in per capita income are accompanied by an equally unprecedented negative environmental impact arising from the huge increase of end-of-life (EoL) products. This study aims to understand and prioritise EoL product reverse logistics (RL) factors from Chinese manufacturing sector perspective. Multiple case studies in five different industries within the manufacturing sector have been carried out and analytic hierarchy process (AHP) has been employed to prioritise the governing factors for the successful RL implementation in the Chinese manufacturing sector. Results indicate that Chinese firms are unlikely to embark on RL operations without external factors such as strict government legislation.     

Statistics for correlated data: phylogenies, space, and time.

Here we give an introduction to the growing number of statistical techniques for analyzing data that are not independent realizations of the same sampling process--in other words, correlated data. We focus on regression problems, in which the value of a given variable depends linearly on the value of another variable. To illustrate different types of processes leading to correlated data, we analyze four simulated examples representing diverse problems arising in ecological studies. The first example is a comparison among species to determine the relationship between home-range area and body size; because species are phylogenetically related, they do not represent independent samples. The second example addresses spatial variation in net primary production and how this might be affected by soil nitrogen; because nearby locations are likely to have similar net primary productivity for reasons other than soil nitrogen, spatial correlation is likely. In the third example, we consider a time-series model to ask whether the decrease in density of a butterfly species is the result of decreases in its host-plant density; because the population density of a species in one generation is likely to affect the density in the following generation, time-series data are often correlated. The fourth example combines both spatial and temporal correlation in an experiment in which prey densities are manipulated to determine the response of predators to their food supply. For each of these examples, we use a different statistical approach for analyzing models of correlated data. Our goal is to give an overview of conceptual issues surrounding correlated data, rather than a detailed tutorial in how to apply different statistical techniques. By dispelling some of the mystery behind correlated data, we hope to encourage ecologists to learn about statistics that could be useful in their own work. Although at first encounter these techniques might seem complicated, they have the power to simplify ecological research by making more types of data and experimental designs open to statistical evaluation.     

防电磁波辐射的功能性服装

电磁波辐射已成为危害人类健康的第四大污染源，如何进行屏蔽是人们日益关注的问题，本文介绍了防电磁波辐射服装的功能及特点，提出了屏蔽服装今后的发展方向．     

Improving supplementary feeding in species conservation

Supplementary feeding is often a knee‐jerk reaction to population declines, and its application is not critically evaluated, leading to polarized views among managers on its usefulness. Here, we advocate a more strategic approach to supplementary feeding so that the choice to use it is clearly justified over, or in combination with, other management actions and the predicted consequences are then critically assessed following implementation. We propose combining methods from a set of specialist disciplines that will allow critical evaluation of the need, benefit, and risks of food supplementation. Through the use of nutritional ecology, population ecology, and structured decision making, conservation managers can make better choices about what and how to feed by estimating consequences on population recovery across a range of possible actions. This structured approach also informs targeted monitoring and more clearly allows supplementary feeding to be integrated in recovery plans and reduces the risk of inefficient decisions. In New Zealand, managers of the endangered Hihi (Notiomystis cincta) often rely on supplementary feeding to support reintroduced populations. On Kapiti island the reintroduced Hihi population has responded well to food supplementation, but the logistics of providing an increasing demand recently outstretched management capacity. To decide whether and how the feeding regime should be revised, managers used a structured decision making approach informed by population responses to alternative feeding regimes. The decision was made to reduce the spatial distribution of feeders and invest saved time in increasing volume of food delivered into a smaller core area. The approach used allowed a transparent and defendable management decision in regard to supplementary feeding, reflecting the multiple objectives of managers and their priorities.     

Influences on dusky dolphin (<Emphasis Type="Italic">Lagenorhynchus obscurus</Emphasis>) fission-fusion dynamics in Admiralty Bay,New Zealand

In societies characterized by a high degree of fission-fusion dynamics, individuals adjust their grouping patterns according to the shifting balance of costs and benefits associated with grouping. This study examines influences on fission-fusion dynamics for dusky dolphins (Lagenorhynchus obscurus) in Admiralty Bay, New Zealand. This area is an important foraging habitat for dusky dolphins during the winter and spring. Admiralty Bay has little predation risk, but nearshore mussel farms may infringe on available habitat. I used generalized estimating equations to determine the influences of coordinated foraging, predation risk, and presence of mussel farms on party size, rate of fission-fusion, and behavioral state. I conducted 168 boat-based group focal follows totaling 168 h. The proportion of individuals observed foraging was positively related to party size and rate of party fusion. Resting had no effect on party size and did not vary according to location. Near mussel farms, traveling decreased, and rate of party fission decreased. I conclude that (1) coordinated foraging strategies are a primary influence on fission-fusion dynamics within this population, (2) dolphins may respond to decreased predation risk by not adjusting party size or location during resting, and (3) areas near mussel farms are not used for traveling.     

慈利县杜仲资源的保护与开发

本文概述了慈利县杜仲资源的分布情况和多年来县委、县政府关于杜仲资源管理及开发的现行政策,剖析了杜仲资源开发、利用过程中存在的问题,提出了关于杜仲开发利用上亟待采取的措施与对策。     

除草剂苯噻草胺土壤滞留因子的蒙特卡洛模拟

采用简单随机抽样和拉丁超立方抽样两种不同方法对除草剂苯噻草胺的土壤滞留因子模型进行蒙特卡洛模拟。结果表明，不同的土壤条件下，苯噻草胺的滞留因子（R）的数值呈Beta分布，最大极值为176．5，最小极值为3．3，最可能的取值在20－30的范围内。结果还显示了采用拉丁超立方抽样方法能够显著降低抽样的不均匀性，进而能降低Beta分布拟合的不确定性。本文还通过色轴在4维图上形象地表征了R值的变化。