JXX-25型木材运输车设计

介绍JXX-25型木材运输车的结构设计、工作原理及其工作过程,着重介绍平行四杆机构和操作系统。其优点是运输车能够沿着相互垂直的两轨道平稳行驶,结构简单、操作方便、运行可靠、一次性投资少。     

The mitigation hierarchy for sharks: A risk‐based framework for reconciling trade‐offs between shark conservation and fisheries objectives

Sharks and their cartilaginous relatives are one of the world's most threatened species groups. The primary cause is overfishing in targeted and bycatch fisheries. Reductions in fishing mortality are needed to halt shark population declines. However, this requires complex fisheries management decisions, which often entail trade‐offs between conservation objectives and fisheries objectives. We propose the mitigation hierarchy (MH)—a step‐wise precautionary approach for minimizing the impacts of human activity on biodiversity—as a novel framework for supporting these management decisions. We outline a holistic conceptual model for risks to sharks in fisheries, which includes biophysical, operational and socioeconomic considerations. We then demonstrate how this model, in conjunction with the MH, can support risk‐based least cost shark conservation. Through providing examples from real‐world fishery management problems, we illustrate how the MH can be applied to a range of species, fisheries and contexts, and explore some of the opportunities and challenges hereto. Finally, we outline next steps for research and implementation. This is important in the context of increasing international regulation of shark fishing and trade, which must lead to reductions in shark mortality, while managing trade‐offs between conservation objectives and the socioeconomic value of fisheries.     

Climate change,migration and human rights in Bangladesh: Perspectives on governance

Bangladesh experiences some of the most severe impacts of climate change, with impacts already evident in the coastal regions. Recent data shows that around 32% of the coastal communities in Bangladesh are affected by climate‐induced hazards each year. In 2011, 64% among them were displaced locally and 27% were displaced to other locations in Bangladesh. It requires comprehensive and viable polices and planning to meet the challenges of managing a large number of displaced people. In this context, this paper reviews and investigates the effectiveness of current governance frameworks to address migration of affected communities. It argues that migration can be an effective way to cope with environmental shocks. Finally, it discusses policy imperatives for effective protection of people displaced by climate risks with a special reference to adopting a human rights‐based approach in law and policy making for climate‐induced migration.     

E-Navigation架构下船舶引航系统

为了提高引航调度效率,保证船舶操纵安全,应用E-Navigation系统架构研发了新型船舶引航系统．该系统采用多分辨率遥感影像、IHO-S57国际标准电子海图等地理空间数据,综合应用了MS、公网3G及实时海流观测等技术．通过实例,证实该系统是可行的．     

省级食物质量安全管理组织建设现状与经验

该文从组织体系建设角度,分析了经济发达区、经济中等发达区和经济欠发达区省级食物质量安全管理组织建设的现状,提出了构建区域食物质量安全管理组织体系的主要经验,即成立跨部门机构,强化区域食物质量安全管理协调职能;机构形式多样化,组建强有力的领导核心。     

基于Zachman企业架构理论的黑龙江省林业电子政务系统建设

以Zachman的企业架构理论为基础,提出了黑龙江林业电子政务系统企业架构框架的总体设计,用以描述黑龙江省林业电子政务信息系统建设的标准、规范和方法,从理论上指导黑龙江省的电子政务的建设,提高政府和企业科学决策水平.     

关于我国森林资源经营管理机制的研究

随着社会主义市场经济体制的逐步完善,传统森林经营管理体系与现行体制的矛盾越来越突出。如何构建适应市场经济体制的森林经营管理体系已成为林业行政主管部门的焦点问题。本文就这一问题进行了系统地分析,试图描述森林经营管理系统的基本框架和构成这一框架的各要素在系统中的作用。     

乌龙茶鲜叶收购信息系统的开发

研究了如何利用现代技术手段构建乌龙茶收鲜信息系统,阐述了该信息系统的设计目标、原则以及系统解决方案等,为乌龙茶生产加工企业的鲜叶收购提供了一个有效的信息管理和质量追溯方法。     

佛山桂畔海东岸南方智谷段景观设计方法浅析

自古以来人类逐水而居,滨水环境作为现代城市居民观赏、游览、休闲、活动的空间,其景观设计尤为重要。如何营造舒适怡人的滨水环境是景观设计师需要解决的难题。文章通过介绍顺德桂畔海东岸南方智谷段景观方案,对滨水景观的空间营造方法、景观环境的美化手段等进行深入分析并总结,以期为该类型景观空间的设计提供借鉴。     

Ammonia abatement strategies in livestock production: A case study of a poultry installation

This study uses a linear programming approach to compare the potential effectiveness of uniform rules (under the Integrated Pollution Prevention and Control Directive) and a landscape-scale (a scale that includes different land-uses) based policy for reducing ammonia (NH₃) emissions and their related impacts from an operating case-study poultry installation. The model incorporates a variety of potential NH₃ abatement techniques. It also incorporates the first application of a spatial model of the diffusion of environmental impacts from NH₃ emissions. This models N deposition at a nearby nature reserve.