刍议湖南国有林场建设与发展

国有林场是林业生态环境建设的重要阵地和根基.着手湖南国有林场建设和发展实际,从性质定位和产权主体、产业结构、财政投入等层面探讨新时期湖南国有林场建设和发展的方向和相关策略,希望能对湖南国有林场建设与发展提供参考.参5.     

木材检查站建设与发展浅探

木材检查站既是林业部门的基层执法单位,也是森林资源保护和监督的主要屏障.通过分析湖南省木材检查站建设与发展现状,剖析木材检查站建设与发展中存在的问题.从检查站布局、检查方法、机构编制和经费、规范化建设等层面探讨木材检查站建设与发展存在的问题的解决对策.     

生态文明建设要点探索

生态文明是继工业文明之后更高层次的文明,而环境保护是生态文明建设的主要内容.在综合分析生态文明建设的目标、任务、本质、路径、关键和保障等理论问题的基础上,提出生态文明建设的要点：生态文明建设的目标是人与自然和谐,核心任务是生态环境保护,本质是发展方式的转变,关键是科技创新驱动,保障是制度建设.认为通过生态文明建设,可最终实现人类社会的可持续发展.     

对高校思想政治教育队伍建设的几点思考

高校思想政治教育队伍建设是加强高校思想政治教育的组织保证.文章通过分析高校思想政治教育工作的特点,说明了加强高校思想政治教育队伍建设的必要性.并从加强高校思想政治教育队伍的思想建设、提高思想政治教育队伍的整体素质和加强高校思想政治教育队伍建设的科学研究和管理等三方面阐述了如何建设一支高素质的思想政治教育队伍.     

江华瑶族自治县生态文明建设水平研究

为有效测度县域生态文明建设水平,采用全排列多边形模型,从经济、环境、社会三大系统建立生态文明建设水平评价指标体系,对江华瑶族自治县(以下简称江华县)生态文明建设水平进行评价.研究表明:就江华县生态文明综合建设水平而言,2011年～2017年期间,综合建设水平逐年提升,2014年～2015年增速最快,至2016年江华县生态文明综合建设水平由较高转为高等级.就经济、环境、社会三大系统而言,2011年,属于发展平衡型;2012年～2013年,属于社会发展落后型;2014年～2015年,属于经济发展落后型;2016年～2017年,虽仍属于社会发展落后型,但三大系统建设水平均脱离较低达到较高等级.总体而言,2011年～2017年三大系统生态文明建设水平逐年提升.     

生态文明建设视角的当代中国旅游地理创新探索

推进生态文明、建设美丽中国,进而实现中华民族伟大复兴的中国梦,已成为中国共产党及其所领导的中国人民的最大追求和奋斗目标.一直为国民经济主战场服务的中国旅游地理,生态文明建设必然为其教材建设的主体内容之一.该文结合《中国旅游地理》(第四版)创新实际,仅就中国旅游地理推进生态文明建设教学内容体系构建及其构架进行了探索.参9.     

武陵山片区生态文化建设的路径选择

生态文化是生态文明建设的核心和灵魂,推进生态文明建设必须紧紧依靠生态文化来引领和支撑.武陵山片区生态文化建设要从崇尚生态文明理念、建构丰富的生态文化载体、着力提升民族特色村寨文化发展能力等方面系统发力.     

新时期我国区域经济地理学教学新体系建设

21世纪知识经济时代对高素质专业人才需求的迫切性、经济地域系统及区域开发问题的日益复杂性对区域经济地理学教学体系建设提出了新的要求.本文从课程体系的设置、教材的建设和教学改革几个方面,探讨了新时期我国区域经济地理学教学体系的建设问题.     

数字化校园环境下高职院校档案信息化建设研究

从高职院校档案信息化管理的意义、建设现状方面进行了论述与总结,提出了高职院校档案信息化的内涵及建设内容,为建立数字化校园环境下高职院校档案信息化建设提供一个很好的参考,具有较高的参考价值.参5.     

论生态园林及其建设的基本原则

生态园林是城市绿地建设的新思维,也是生态学具体应用的实践.生态园林建设应遵循生态优先、物种多样性保护和重建、因地制宜、处理好种间关系、建立群落自维持机制、重视生态文化内涵等六要素.     

On the behaviour of the residence time at the bottom of the mixed layer

To understand why the findings of Deleersnijder et al. [(2006), Environ Fluid Mech 6: 25–42]—the residence time in the mixed layer in not necessarily zero at the pycnocline—are consistent with those of Delhez and Deleersnijder [(2006), Ocean Dyn 56:139–150]—the residence time in a control domain vanishes at the open boundaries of this control domain—, it is necessary to consider a control domain that includes part of the pycnocline, in which the eddy diffusivity is assumed to be zero. Then, depending on the behaviour of the eddy diffusivity near the bottom of the mixed layer, the residence time may be seen to exhibit a discontinuity at the interface between the mixed layer and the pycnocline. If such a discontinuity exists, the residence time is non-zero in the former and zero in the latter. This is illustrated by analytical solutions obtained under the assumption that the eddy diffusivity is constant in the mixed layer.     

Observations on the function of the glands of the foot of the pediveliger of Ostrea edulis during settlement

The use during settlement of secretions of the 9 different types of gland in the foot of the pediveliger of Ostrea edulis L. was examined experimentally. During settlement, there is a progressive decrease in the crawling speed of the larva and a strengthening of its bond with the substratum. Both changes are related to (a) a change from ciliary to muscular pedal locomotion; (b) the increasing acidity and viscosity of the mucoid secretions used; (c) the secretion of a byssus thread by the glands of the byssus duet; (d) changes in the form and composition of this byssus. At the termination of settlement, the entire contents of 2 types of gland are discharged. Their secretions give rise to the cement which permanently fixes the larva to the substratum. The 9 types of gland are utilised sequentially in a manner closely related to the 6 phases recognised in settlement behaviour.     

刍议医院资产管理的现状及其对策

医院的固定资产和流动资产是医院赖以生存和发展的基础,是一项非经营性国有资产．目前公立医院固定资产、流动资产管理现状不容乐观,针对这种状况,首先分析问题形成的原因,然后提出管理的措施或建议,从而使资产管理工作规范化、制度化、科学化,使有限的卫生资源发挥出最大的社会效益和经济效益．参3．     

豪猪消化系统的解剖研究

为了了解豪猪的消化生理,为豪猪的人工饲养技术研究提供基础依据,以达到高效饲养豪猪的目的,笔者对豪猪的消化器官进行了系统解剖研究.结果表明:豪猪的胃为单室胃.盲肠很发达,这与其能够消化植物纤维有关.豪猪肝脏很发达,其重量为402 g,是其体重的4.59%,肝脏分叶多而明显.     

Mining of the forest and the time path of the price of timber

The paper analyzes the effect of transportation (site specific) costs and the effect of mining (depletion) of the forest on the time path of the price and of the net price of timber in two forestry models. The models differ in that one has zero costs and the other has positive costs. The analyses yield the standard mining theory results for certain cases. They also yield extentions of these results for cases with growth of the harvested trees and/or regeneration on the harvested land. The paper concludes, as one would expect, that the theory of the mine is useful in analyzing the time path of the price of timber.     

Adjusting the economy to the new energy realities of the second half of the age of oil

Our research indicates that, due to the depletion of conventional, and hence cheap, crude oil supplies (i.e. peak oil), increasing the supply of oil in the future would require exploiting lower quality resources (i.e. expensive), and thus will most likely occur only at high prices. This situation creates a system of feedbacks where economic growth, which requires more oil, would require high oil prices that will undermine that economic growth. We conclude that the economic growth of the past 40 years is unlikely to continue unless there is some remarkable change in how we manage our economy.     

Splitting the tail of the displacement kernel shows the unimportance of kurtosis

Animals disperse in space through different movement behaviors, resulting in different displacement distances. This is often described with a displacement kernel where the long-distance dispersers are within the tail of the kernel. A displacement with a large proportion of long-distance dispersers may have impact on different aspects of spatial ecology such as invasion speed, population persistence, and distribution. It is, however, unclear whether the kurtosis of the kernel plays a major role since a fatter tail also influences the variance of the kernel. We modeled displacement in landscapes with different amounts and configurations of habitats and handled kurtosis and variance separately to study how these affected population distribution and transition time. We conclude that kurtosis is not important for any of these aspects of spatial ecology. The variance of the kernel, on the other hand, was of great importance to both population distribution and transition time. We argue that separating variance and kurtosis can cast new light on the way in which long-distance dispersers are important in ecological processes. Consequences for empirical studies are discussed.     

Stimulation of fat-body production in the polyps of the coralPocillopora damicornis by the presence of mutualistic crabs of the genusTrapezia

A mutualism exists between the xanthid crabs of the genusTrapezia and their host corals,Pocillopora damicornis. It has previously been established that these obligate coral residents benefit the coral hosts by defending them against echinoderm predators and by increasing the survival of polyps located deep between the coral branches. In turn, the corals apparently benefit the crabs by producing lipid-filled structures on which the trapezid crabs feed; these fat bodies may contain some of the lipid which in previous studies of coral metabolism has been termed excess. It was determined by experiments conducted at the Hawaii Institute of Marine Biology that the presence of crabs in colonies ofP. damicornis stimulates the polyps to produce the lipid-filled fat bodies; removal of crabs causes corals to cease producing fat bodies. A structure very similar to the fat bodies ofP. damicornis has been reported inAcropora durvillei. Both of these coral genera ordinarily possess xanthid-crab mutualists. This association between branching corals and crustaceans may have evolved because corals of these genera provide shelter among their branches and because these shallow-water corals are evidently capable of releasing lipid which is excess to the corals' metabolic needs, but which can be utilized by the crabs.     

三峡库区消落带土壤中铅污染调查

报道了三峡库区长江干流及小江支流消落带土壤中重金属铅含量背景值的调查结果。结果表明，目前土壤未被重金属铅污染。