The impacts of climate change on potential natural vegetation distribution

Change in potential natural vegetation (PNV) distribution associated with climate change due to the doubling atmospheric carbon dioxide (2×CO₂) was estimated with a global natural vegetation mapping system based on the modified Kira scheme to the globe and the continents. With an input of widely-distributed global climate data, the system interpolates data onto a 1° latitude by 1° longitude grid over the globe, generates estimates of vegetation type, and produces a composite PNV map. The input climate data corresponding to the 1×CO₂ and 2×CO₂ consists of observations prior to AD 1958 at 2,001 weather stations worldwide and the 2×CO₂ simulation output from the Japan Meteorological Research Institue's General Circulation Model, respectively. As a result of the simulated global warming, the vegetation zones expanded mostly from the tropics toward the poles. PNV area changed by 6.98 billion (G) ha of the total land area (15.04 Gha) and potential forest area corresponding to the closed forest and open forest (woodland) reached 9.74 Gha with the increase of 1.29 Gha. The potential forest area in Europe had obvious advantages to the climate change accompanied with the increase of actual forest area. Although the actual forest area has decreased in North America and Asia, the potential forest area in these continents also benefitted from the climate change. In the end, the remaining continents tended to bear the brunt of the climate change.     

环氧煤沥青冷缠带

回顾了环氧煤沥青涂料的应用实践，指出虽然该涂料有诸多优点，但因其固化反应受温度影响，质量不易保证等缺陷限制了使用。提出了一种新型防腐材料－－环氧煤沥青冷缠带。它以涤纶无纺布为基材，将高环氧树脂含理的环氧煤沥青涂敷在基材上，用低温氧化、潮湿型树脂固化剂作底胶。使用冷缠带所形成的覆盖层具有机械强度高、粘结力大、化学性质稳定、电绝缘性能好等特点。同时还介绍了冷缠带的技术性能、施工方法、经济指标及适用范围     

绿竹丰产林培育的技术措施

文章介绍了绿竹丰产林培育的主要技术措施。幼林的管理措施主要有幼林管护、除草松土、施肥、母竹留养、间作套种；成林管理措施主要有扒土、施肥、培土、灌溉、绿竹采笋、母竹留养及合理采伐以及病虫害防治。     

信阳地区养鹅技术要点和综合利用

信阳地区地处丘陵地带,具有独特的自然条件和资源优势。本文探索了节粮型养鹅技术要点和综合利用措施。     

L—C经典破产模型的推广及应用

在L—C破产模型的基础上，建立了多险种破产模型，扩展了应用范围，提出了保证破产概率不大于α时初始资本u的一个很好的分配方案．     

网络时代高等职业技术学院图书馆的信息服务策略

阐述了高等职业技术学院图书馆开展信息服务的突出特色策略、委托外包策略、人才培养策略、依靠读者策略和成果积累策略。     

储罐自动脱水器在原油脱水中的应用

针对吐哈原油库脱水工艺存在的问题,提出了改进原有工艺,在隔油池进口处增设一台储油罐自动脱水器的新技术,并介绍了储油罐自动脱水器的工作原理、结构特点和相关运行管理措施,总结了使用效果中存在的问题,给出了相应的建议。     

TDRSS Communication Services AndSignal Schemes

Tracking and Data Relay Satellite System studying and constructing is an important sustaining system in China. The signal designing of TDRSSis systematically introduced in this paper. According to various services, KSA, SSA, MA, UQPSK are selected in the up link, data spreaded spectrum is transferred in I section and ranging code is transferredin Q section. According to the different data groups and modes, spreading spectrum or not is selected and QPSK is used. The signal equations and system designing notes are presentedin detail.     

浅谈秋季造林

根据多年各季节效果的总结,论述了采用秋季造林的优点、秋季造林的技术要求及秋季造林方法。     

林木种苗基地规划设计若干问题的探讨

通过对林木种苗基地规划设计中产品方案设计、生产规模设计、生产工艺设计、基地区划设计四个方面的研究探讨,总结出林木种苗基地规划设计中应遵循的最基本的设计思路。