关于加快三北地区农田防护林体系建设的思考

三北地区农田防护林体系建设取得了巨大成就,与1977年相比,2004年区内有林地面积增加了161%,森林覆盖率增加了5个多百分点。然而目前也面临着一些不容忽视的问题,建设任务艰巨,急待加快发展步伐。建议:加大政府资金投入和金融支持,明晰产权,创新机制,加强后续产业发展,强化科技支撑。     

三江平原的鹤类资源及保护

三江平原1958年开始有计划开发,到1990年代末,湿地仅余1.6×104hm2,且极度破碎,环境恶化,有些种类已绝迹,现存种类亦处于濒危状态。丹顶鹤由开发初期的数千只,减少到1990年代中期的百余只。挠力河流域2000年有丹顶鹤103只。2001年该区丹顶鹤繁殖数量约为200只,迁徙数量为800只左右;白枕鹤繁殖数量为70~90只,迁徙数量为700~800只;白头鹤迁徙数量为100左右;其它鹤类数量极少。影响鹤类分布的主要原因有栖息地面积减少、人为干扰严重、环境污染和食物减少等。     

Study on the abandonment of sloping farmland in Fengjie County,Three Gorges Reservoir Area,a mountainous area in China

The farmland abandonment phenomenon in mountainous areas is a recent change in relationships between man and land that emerged in China's land-use transition. Revealing spatial distribution characteristics and influence factors of sloping farmland (SF) and abandoned farmland (AF) in mountainous areas is conducive to rational allocation and optimization on local land resources. This paper investigated regional distribution features of SF and AF in the hinterland of the Three Gorges Reservoir Area (TGRA) using high-resolution remote sensing images, ArcGIS spatial analysis, and statistical methods. The results found that the spatial distribution of SF and AF has an approximate characteristic under different topography, location, or accessibility backgrounds. However, within different spatial coupling relationships between SF and AF, influencing mechanisms of farmland abandonment are significantly different. The diversity of geographical locations reflecting natural and social contexts is an essential reason for this differentiation. Moreover, dominant influencing factors of farmland abandonment in the study area are natural factors such as slope and farmland quality. Socioeconomic factors, including distance to road, peasant income, and labor force proportion, guide the distribution and trend of farmland abandonment to varying degrees. Finally, four modes of farmland abandonment in TGRA have proposed and suggested that the corresponding plans for SF consolidation should be proposed based on fine classification, which is of great significance for farmland utilization and rural revitalization in underdeveloped mountainous areas.     

基金收益率排名与计算的比较研究

目前各种财经媒体推出的基金收益率排名存在较大差异,向前复权或向后复权均不能反映基金的实际收益情况。基于定点复权的思想,本文提出新的实际收益率计算方法,重点关注分红对基金收益的影响,并构建分析模板分别对开放式基金和封闭式基金进行研究。针对封闭式基金实际收益率构建的三因子模型,发现封基的实际收益率除了和其自身盈利能力有关之外,对折价率变动、分红再投资收益等因素更加敏感。     

论高速铁路精密工程测量“三网合一”

客运专线铁路对测量精度要求较高,传统的分阶段布网方式和方法已不能满足现代高速铁路建设的需要。文章提出了三网合一的测量体系和布设原则及控制网的精度梯度等级,该体系的建立能统一高速铁路勘测控制网、施工控制网、运营维护控制网的起算基准和协调其精度,保证无碴轨道铁路工程的顺利实施。     

学理论 提素质 定信念 践“三讲”

以理论学习为基础,以“主题教育”活动为载体,以“对标创优”活动为重点,多攀措推进车间员工学理论、提素质、定信念、践“三讲”,推进车间党建工作和“对标创优”活动上水平。     

Theoretical Framework and Method of Detecting Accounting Fraud

Accounting fraud has never been rooted out, which brings a lot of trouble to our society. Only through strengthening user＇s ability to discern, decode and feedback the false information can we maximally understand the information behind. Therefore, devoting ourselves to setting up a framework of detecting the accounting fraud has become a feasible and efficient way to solve this problem. Based on the ＂Three Elements Theory＂, this paper demonstrates a new way to discern the fraud by researching its origins. The authors combine the theoretical model and the applied technology together to design a fraud recognization system.     

三峡库区迁建山地新城绿地景观生态结构构建

以三峡库区9个全淹或基本全淹县城的绿地景观结构规划与建设现状为对象,在实地调研基础上,分析研究三峡库区迁建山地新城绿地景观结构建设相关的影响因素及其基本形态演变特征。根据三峡库区迁建山地新城绿地景观结构建设的特点,结合城市绿地景观结构生态规划的理论,从迁建山地新城组团式山地结构的发展特点,保护和恢复生态敏感地的完整性和连续性,三峡库区迁建城市(镇)自然、历史、人文文化特色,构建复合功能的新城绿地景观生态结构体系,及构建绿地景观外围生态圈结构等五个方面,对今后三峡库区迁建山地新城绿地景观结构规划和建设进行了探讨。     

三峡农村外迁移民稳定与发展工作的回顾与思考

三峡农村外迁移民的稳定与发展一直以来是世人所关注的问题,也是各级政府和有关部门高度重视的工作。为了实现水库移民"搬得出、稳得住、逐步能致富"的搬迁安置目标,就必须以水库移民的稳定与发展作为移民安置工作的出发点和落脚点。本文以稳定与发展的辩证关系为理论基础,分析了三峡农村外迁移民稳定与发展的工作经验与方法,探讨了三峡外迁移民持续稳定与发展过程中存在的问题,提出了三峡外迁移民持续稳定与发展的工作建议。     

我国新股IPO高定价发行原因及对策——新股IPO定价模型研究初探

新股IPO＂三高＂现象一直是困扰我国证券市场健康发展的问题之一,2010年11月,中国证监会有针对性地实施了新股发行体制第二轮改革。笔者认为,此次改革之所以没有达到预期效果,主要是对＂三高＂产生的根本原因缺乏必要的研究。文章通过构建新股定价模型,从一个全新的角度探究新股IPO＂三高＂背后的根本原因,并提出了解决＂三高＂的思路与对策,丰富与创新了相关的理论。