国家林业局计算机网络的安全管理探讨     

滕立春 《林业资源管理》2008,(4)

从网络安全管理平台建设的规划、定位、功能、结构、集成、运行维护等方面对国家林业局计算机网络的安全管理与策略进行了论述和探讨。  相似文献   

勤工助学与学生公寓管理     

朱伯平 《四川畜牧兽医学院学报》2007,5(5):161-163

参与学生公寓的管理对于大学生勤工助学来说有着非常重要的意义，它不仅是大学生参加社会实践的一个重要方式，也是解决家庭经济困难学生问题的一种主要途径，同时在管理过程中也使学生实现了自我管理的目的。  相似文献   

Population dynamics of tree species in southern Quebec,Canada: 1970–2005     

Louis Duchesne  Rock Ouimet 《Forest Ecology and Management》2008

Over the last few decades, several phenomena contributed to modify the structure and composition of the eastern North American forests. Along with forest management, disturbances such as insect defoliation, global environmental changes, acid deposition, and rising atmospheric CO₂ concentrations, have been identified as phenomena that could affect forest structure and composition. Currently, there is very little quantitative information on the resulting effect of multiple disturbances on the main parameters of forest dynamics (growth, mortality, and recruitment). Using available data from the Quebec permanent sample plots network, we analyzed the ecological response of tree species populations to the combined effect of contemporary global environmental changes, disturbance regimes, and forest management practices over the last 30 years in southern Quebec. The results indicate that the main parameters of forest dynamics changed considerably over the last three decades. The last spruce budworm outbreak initiated a successional change in coniferous stands. The basal area of Abies balsamea and Picea glauca, the most abundant coniferous species, decreased by 29.7%, while pioneer species abundance increased. For late successional deciduous species, observed changes in forest dynamics appear to be mainly associated with global environmental changes rather than with natural disturbances or forest harvesting. The results indicate that inferring responses of tree population dynamics to global environmental changes can be very complex or even misleading considering the confounding effects of other disturbance agents. The results also suggest that the ecosystem-based management approach promoted by forest ecologists, aimed at maintaining landscape stand composition and structures similar to those characterizing natural environments, will not be easily achieved. Forest ecosystems are highly dynamic and disturbances other than tree harvesting appear to have been the major factors affecting their pattern of change over the last three decades. Forest managers should consider adaptive management approaches that will consider the contemporary evolution of forest ecosystems in a changing environment.  相似文献   

降低农村电网线损的措施     

孔祥伟 《农业机械化与电气化》2009,(3):93-95

从改善电力网络功率分布、合理安排经济运行方式、加强农村电网改造等角度,论述了降低技术线损的措施;从制定线损指标计划、加强计量管理和抄收管理、建立管理线损考核制度和约束机制等方面入手,提出降低管理线损的具体措施。  相似文献   

科研院所应急管理能力建设探析——以中国热带农业科学院为例     

方艳玲  陈刚  刘燕群 《热带农业科学》2009,29(12):61-63

以中国热带农业科学院为例,通过对科研院所应急管理特点的剖析,从提高认识、加大投入、健全机制、提升能力等四个方面对提升科研院所应急管理能力提出建议。  相似文献   

家庭蚕桑适度规模经营的实践探索   总被引：1，自引：0，他引：1  

胡剑波  汪伟萍 《蚕桑通报》1997,(4):4-6

推地蚕桑适度规模经营是提高蚕桑生产经济效益的一项主要途径。海宁市对蚕桑适度规模经营进行了试点实践和调查，并就提出该课题的依据，可能性，典型蚕户的经营分析，适度规模经营的指标，优缺点进行了有益探讨。  相似文献   

关于高校教风建设的思考   总被引：2，自引：0，他引：2  

洪世梅  李莉萍 《浙江林学院学报》1998,15(2):221-224

就目前高校教风存在的一些问题分４个方面进行了深入的分析和探讨，并提出了加强高校教风建设的６条对策与措施。  相似文献   

Sustainable Mountain Watershed Management in China     

王礼先 《中国林学(英文版)》1997,(2)

在分析中国水土资源的状况及水土流失危害的基础上，作者介绍了中国山区流域经营的主要经验与措施体系；应用全国各大流域２０个典型，分析了流域经营的效益．为了判别流域经营的可持续性，提出了包括社会经济与生态环境两个方面的可持续流域经营指标体系．  相似文献   

Policy options and system supplies on socialization standard managemerit of city agricultural laborers     

SUN Yujuan 《东北农业大学学报(英文版)》2007,14(1):87-91

It is a social system engineering to solve problems of city agricultural laborers, inevitably concerning series of social phenomenon and the social issues of the city and countryside relations, the government function, the city management, the fair efficiency, the population flows, the labor employment, the social security, and so on. Furthermore, it also involves the profoundly political and economic system reforms, the transformation of government functions, the system perfection, legal administration, the social stability in China. The city government, as the direct superintendent of the agricultural laborers, should adopt the conception of the system engineering to construct a new mechanism of the city agricultural laborers socialization standard management, which has a profound theoretical and practical significance.  相似文献   

Water-table management in lowland UK peat soils and its potential impact on CO₂ emission     

C. Kechavarzi    Q. Dawson    P. B. Leeds-Harrison  J. Szaty&#;owicz  & T. Gnatowski 《Soil Use and Management》2007,23(4):359-367

The rate of oxidation of peat soils is highly seasonal and varies with temperature and soil moisture content. Large variations in soil moisture content result in wet–dry cycles that can enhance peat degradation. Water‐table management plays a crucial role in controlling and damping the effect of these environmental factors. However, maintaining high ditch water levels in fields bounded by ditches does not guarantee a high field groundwater level. The effect of installing subsurface irrigation at different spacings on water table elevation was studied in a low‐lying peat grassland. The water table elevation data were compared against values predicted with a water balance model. In addition, greenhouse experiments were carried out on undisturbed soil core samples collected from the peat grassland as well as a low‐lying peatland under intensive arable faming to measure CO₂ evolution under different water regimes. The field data from the peat grassland suggest that sub‐irrigation spacing as low as 10 m is necessary during summer periods to maintain groundwater levels similar to those in the ditches. Over the same period of observation, the difference in water level between the ditches and the non‐irrigated fields is as high as 0.7 m. Modelled outputs are in good correlation with the field observations, and demonstrate that simple water balance models can provide an effective tool to study the effect of water management practices and potential changes in subsurface conditions, climate and land use on water‐table levels. The measurement of CO₂ emission from undisturbed peat soil columns shows that the rate of oxidation of soil organic matter from peat soils is highly seasonal and that drainage exacerbates the rate of peat mineralization.  相似文献