试论我国生态农业系统功能

本文从熵的角度出发,阐述了生态农业系统功能的特点,即生态农业系统的物质、能量的利用效率和时间、空间利用效率较高,与常规农业相比,减少了能量的浪费,使之处于低熵状态,这样生态农业系统更趋稳定,并向着动态平衡方向发展。     

对税法通则立法的几点认识

税法通则应从法的高度界定中央与地方的税收权限,明确各自权利、义务,保护和调动各级政府治税理财和各方协税护税积极性。     

加强车辆管理减少城市污染

文章概述了车辆管理部门对于减少城市空气污染所起的作用,着重分析了加强车辆管理工作与保障人民健康生活的关系,并提出了如何降低城市有害气体排放的设想和方法。     

Research on the relationship between stand productivity and site condition of Larix kaempferi

In this research, five plots are Selected based on stand storage and productivity of planted forest of Larix kaempferi （Japanese larch） as well as their relationship with factors suCh as forest age, site condition and stand density. Through standard plot investigation and method of trunk analysis, systematic research is conducted on storage and productivity of the planted forest and their relationship with site condition. As shown in the research, productivity of planted forest of Larix kaempferi in low latitude area is higher than that in high latitude area while stand productivity is higher in slight acid soil. Contents of potassium element in the soil have Considerable influence on productivity of the Larix kaempferi forest.     

A study on the protection of biodiversity resources in Micangshan Forest Park in northeast of Sichuan Province

The Micangshan Forest Park is located in the northeast edge of the Sichuan Basin. The wild animals and plants resources are rich and the ecosystem is integrity. There are well-preserved areas of native biological communities. Its strip and the region decided that on the one hand biological diversity is rich; on the other hand, there is its unique ecological fragility. Once it is destroyed, it would be very difficult to restore. In order to protect the ecological environment of wild animal and plant habitats and wild animal and plant resources, this paper uses quadrat survey procedure to carry on the investigation. In the Micangshan Forest Park＇s typical land sector the author establishes the sample area of 20 m×20 m to invest the tree layer of plant species and builds five 2 m×2 m the small quadrats along the type place＇s diagonal line machinery to invest bush level and the field layer floristic component. Again according to the Micangshan Forest Park＇s terrain, the vegetation and the difference humanity interference condition, the autor builds the different quantities separately the line transect to invest the animal type. This article through to eastern Sichuan Province north the Micangshan forest park biodiversity resources investigation, has analyzed the biodiversity protection work present situation and the existence question, and put forward the proposal to the next protection work.     

FDI知识溢出、自主R&D投入与内资高技术企业创新能力——基于中国高技术产业分行业动态面板数据模型的检验

基于知识生产函数,利用 1995～2008 年中国高技术产业 17 个细分行业的面板数据,本文研究了 FDI 知识溢出和自主 R&D 投入对内资企业创新能力的影响.研究表明,内资企业自主 R&D 投入是形成其创新能力的最主要因素;外资企业 R&D 活动对内资企业产生了一定的知识溢出效应,在一定程度上推动了内资企业创新能...     

增创私营经济发展新优势的现实阻隔与对策选择

近年来我国私营经济发展比较平缓，如何解决私营经济发展中面临的种种困难，从而增创私营经济发展的优势，已成为当前私营经济发展过程中亟待解决的问题，本文对当前影响和制约我国私营经济增创争创发展新优势的主要阻隔进行了分析，并提出了相应的对策。     

光杆卡的标准化问题应引起充分重视

通过对油田普遍延用的卡瓦式光杆卡缺陷分析，论述了贯彻执行新标准SY／T5029的必要性。介绍了按新标准研制“无压痕标准光杆卡”的过程和应用价值。并对新标准中的缺点提出了改进建议。     

《抽油泵及其组件规范》采标的滞后问题

通过对2001年版API Spec 11AX《抽油泵及其组件规范》的研究分析，指出了新版标准的先进性、科学性和合理性，阐明GB／T18607—2001：API Spec 11AX(1996)《抽油泵及其组件规范》在采标中存在滞后问题。     

浅析房地产业的危机管理及其对策

房地产业已经成为我国经济的支柱产业。但是,我国房地产投资规模过大,商品房价格上涨过快,商品房结构不合理,房地产市场秩序比较混乱,直接影响城镇居民家庭住房条件的改善;同时,也导致银行信贷结构不合理,加剧银行信贷风险,进而影响金融安全和社会稳定。目前,中央连续出台了一系列政策稳定住房价格。面对政策的出台,房地产业显得不知所措,因此加强房地产业的危机管理显得尤为重要。