China''''s Cooperative Exploration of Oil and Gas and Its Taxation System

China' s foreign-oriented oil taxation system has, from the beginning, been based upon the positive experiences of other oil-producing countries and has incorporated common international practices. The system has been perfected over decades. It of fers more incentives than other oil-producing countries in the following four aspects: (1) Income tax has a "wide tax base and low tax rate"; (2) VAT levies a low tax rate on ma-     

火电厂竞争力评价与分析

通过对影响火电厂竞争力的主要因素的分析,提出了火电厂竞争力评价的简化指标体系,并进行算例分析,提出了相应结论和建议。     

坚持预防为主推动水土保持监督管理向纵深发展

2006年,山东省认真贯彻“预防为主”的水土保持工作方针,狠抓“三权”落实,努力控制人为水土流失,充分发挥监督管理工作在水土保持生态环境建设中的“保驾护航”作用,水土保持监督管理工作逐步向纵深发展,呈现出新的局面。一是宣传教育与立案查处双管齐下。2006年年初,山东省水利厅下达了“关于搞好水土保持宣传工作的通知”,对做好这项工作进行了部署,并与山东电视台、     

A TVD SCHEME FOR INCOMPRESSIBLE FLOW COUPLED WITH DIFFERENT TURBULENCE MODLES ON A GROUND- MOUNTED SQUARE-RIB FLOW

A finite-difference Total Variation Diminishing (TVD) numerical simulation model for coupling the Reynolds Averaged Navier-Stokes (RANS) equations, pressure-relative continuity equation and various k-εturbulence models was developed to solve the incompressible flow based on the pseudo-compressibility method. The hyperbolicity of all these equations was studied and the discretization of the fully coupling equations with all the primal variables and source terms were made in this article. Numerical simulation for modeling the flow around a ground-mounted square rib was implemented and validated by comparing with the published wind tunnel experimental data. It is shown that such a numerical simulation method with a proper turbulence model has a very good accuracy to simulate the flow around a surface-mounted rib. It is concluded that the Renormalization Group (RNG) and Chen-Kim k-εturbulence models have much better ability to predict the characteristics of the vortex structure and flow separation than the standard k-εmodel.     

自由现金流、控制结构与投资——对A股和香港上市公司的比较研究

文章从控制结构和市场环境角度对A股和香港上市公司的投资—现金流敏感性作了比较研究。本文的研究发现,A股和香港上市公司的投资与自由现金流存在显著的正相关关系。控制结构是投资—现金流敏感性的影响因素,多数制衡控制、多数独占控制和少数状态依存控制结构的投资—现金流敏感性依次增加。处在不同的市场环境中,投资—现金流敏感性水平也会表现出差异。香港本地股的投资与自由现金流之间的相关关系最强,其次为A+H股和A股。     

发展农业科技型企业的思考及对策

农业的根本出路在于农业现代化,而农业的产业化、市场化、国际化、标准化、科技化已成为实现农业现代化的基本规定性。大力发展农业科技型企业,发挥其在农业发展中的示范引导、科技创新、龙头带动、市场开拓作用,对促进农业发展,实现农业现代化起着极其关键的作用。本文就农业科技企业发育的背景、农业科技企业的内涵与功能进行了阐述,在此基础上提出了发展农业科技型企业的途径与对策。     

THE OPTIMAL DESIGN BASED ON RELIABILITY OF WATER DISTRIBUTION SYSTEM BY LINEAR MODEL

In this paper, a new technique are developed for optimal design of water distribution system besed on reliability. It applies a linear programming algorithm to the optimal design based on reliability. Within a small optimal search step range,the objective function and constraints can be expressed in the first order Taylor-expanding form,and three sub-models (a steady-state simulation model, a reliability model and a linear optimization model) are linked each in optimal searches. Thus, a traditional non linear problem can be solved by a linear model, the computing burden is significantly decreased. Therefore, the linear optimal model developed by the paper has more practical significance.     

中国农民工供给态势与“十二五”时期走向

我国农村劳动力转移已进入总体上仍然过剩,但结构性供求矛盾开始突出,农村劳动力供求关系正从长期供过于求转向总量过剩,结构短缺的新阶段。促进农村劳动力转移仍将是我国中长期的重要任务。十二五以及更长时间内,要做好劳动力转移工作,必须把产业结构优化调整放在重要的位置,坚持发展服务业,有序积极推进农民工市民化工作,进一步增加对农村居民培训的投入,提高农村劳动力的受教育程度和技能水平,进而促进社会和谐发展。     

中国民生发展指数总体设计框架

十二五期间,中国保障与改善民生仍面临着诸多挑战,设计一套科学性、系统性、可操作性、可比性及可量化性的评价体系有利于测度中国民生发展状况与进展,在政策层面上起到省域民生发展的战略导向作用。中国民生发展指数整体框架涉及指标体系构建、指标数据处理、评价指数计算等几个方面,结合国内外通用规则,采用综合评价指数法对我国区域民生发展水平进行横向比较与纵向考察。通过编制与分析中国民生发展指数,加强了对中国民生区域发展差异深层次理论与实践问题的探索与理解,为政府正确决策提供科学依据。