论我国农村集体土地法律制度的完善

土地利用效益不高,长期以来一直制约着农民收入的增长.《物权法》的颁布,对提高土地的效益将会起着重大的促进作用.本文探讨了在《物权法》的实施过程中,我们应当注意的一些具体问题.     

面向对象的航空发动机性能仿真程序设计方法研究

本文提出了一种用于建立扩展性强、灵活可靠的航空发动机性能仿真方法。通过建立一个面向对象的航空发动机基本类库（或称为航空发动机应用程序框架）,针对不同的研究目的或不同类型的航空发动机,能够非常方便可靠地建立起高效专用的发动机性能仿真程序。本文提出了在仿真程序中建立异常处理机制以方便仿真软件的调试和提高它的可靠性。本文在该框架的基础上建立了某双轴涡扇发动机的性能仿真模型和某涡轴发动机的性能仿真模型,揭示了该框架的灵活性和专用性     

Pressure,O2, and CO2, in aquatic Closed Ecological Systems

Pressure increased during net photosynthetic O₂ production in the light and decreased during respiratory O₂ uptake during the dark in aquatic Closed Ecological Systems (CESs) with small head gas volumes. Because most CO₂ will be in the liquid phase as bicarbonate and carbonate anions, and CO₂ is more soluble than O₂, volumes of gaseous CO₂ and gaseous O₂ will not change in a compensatory manner, leading to the development of pressure. Pressure increases were greatest with nutrient rich medium with NaHCO₃ as the carbon source. With more dilute media, pressure was greatest with NaHCO₃, and less with cellulose or no-added carbon. Without adequate turbulence, pressure measurements lagged dissolved O₂ concentrations by several hours and dark respiration would have been especially underestimated in our systems (250–1000 ml). With adequate turbulence (rotary shaker), pressure measurements and dissolved O₂ concentrations generally agreed during lights on/off cycles, but O₂ measurements provided more detail. At 20 °C, 29.9 times as much O₂ will distribute into the gas phase as in the liquid, per unit volume, as a result of the limited solubility of O₂ in water and according to Henry’s Law. Thus even a small head gas volume can contain more O₂ than a larger volume of water. When both dissolved and gaseous O₂ and CO₂ are summed, the changes in Total O₂ and CO₂ are in relatively close agreement when NaHCO₃ is the carbon source. These findings disprove an assumption made in some of Taub’s earlier research that aquatic CESs would remain at approximately atmospheric pressure because approximately equal molar quantities of O₂ and CO₂ would exchange during photosynthesis and respiration; this assumption neglected the distribution of O₂ between water and gas phases. High pressures can occur when NaHCO₃ is the carbon source in nutrient rich media and if head-gas volumes are small relative to the liquid volume; e.g., one “worse case” condition developed 800 mm Hg above atmospheric pressure and broke the glass container. Plastic screw cap closures are likely to leak at high pressures and should not be assumed to seal unless tested at appropriate pressures. Pressure can be reduced by having larger head-gas volumes and using less concentrated nutrient solutions. It is important that pressure changes be considered for both safety and closure, and if total O₂ is used as the measure of net photosynthesis and respiration, the O₂ in the gas phase must be added to the dissolved O₂.     

Software defect prevention based on human error theories

Software defect prevention is an important way to reduce the defect introduction rate.As the primary cause of software defects,human error can be the key to understanding and preventing software defects.This paper proposes a defect prevention approach based on human error mechanisms:DPeHE.The approach includes both knowledge and regulation training in human error prevention.Knowledge training provides programmers with explicit knowledge on why programmers commit errors,what kinds of errors tend to be committed under different circumstances,and how these errors can be prevented.Regulation training further helps programmers to promote the awareness and ability to prevent human errors through practice.The practice is facilitated by a problem solving checklist and a root cause identification checklist.This paper provides a systematic framework that integrates knowledge across disciplines,e.g.,cognitive science,software psychology and software engineering to defend against human errors in software development.Furthermore,we applied this approach in an international company at CMM Level 5 and a software development institution at CMM Level 1 in the Chinese Aviation Industry.The application cases show that the approach is feasible and effective in promoting developers' ability to prevent software defects,inde pendent of process maturity levels.     

面向对象的MIS设计方法的研究

重点论述了面向对象的设计方法，并且根据管理信息系统的特点，提出一种面向数据设计和面向对象实现相结合的系统开发方法。     

对会计信息公开制度的探讨

会计的首要目标是为企业的经营决策提供有用的信息,会计信息公开是适应市场经济发展要求,顺应会计的国际化要求,符合内外部使用者的利益要求,同时也满足企业自身发展的要求的必然,会计信息公开制度的建立和完善是会计发展的趋势,尽管存在着多方面的不足,更多的是需要我们去发现和解决问题,完善和规范我国的会计体系。本文主要从两方面入手：一是确保企业公开的会计信息真实、可靠,前几个途径正是从这点入手的;二是投资者必须能识别和使用会计信息。     

转变法律教育观念培养合格法律人才

法律是科学的观念长期以来给法律教学模式带来深刻影响。当今社会发展，这种理念使法律教育弊端重重并与现实生活格格不入。法律非科学，法律是技术与艺术的结合，应当成为我们转变法律教育观念和法律教育模式改革的方向。     

LHD部件的失效机理与数值计算

通过检测数据的分析,探讨了LID部件潮解失效机制的物理、化学过程。根据质量作用定律,分子运动论和碰撞理论,给出了扩散系数的假定,从而建立了数学模型。利用建立的模型,对半径为P_o的实球体进行了数值计算。计算结果表明:描绘的曲线和拟合公式与试测曲线和回归公式相对比,形式上基本一致。由于部件实际形状并非实球,假设的参数很难与贮存条件一致,因此数值上有差别,这是很自然的。     

我国人力资源法制化建设的政策分析——基于《劳动合同法》和《就业促进法》视角

我国新制定的《劳动合同法》和《就业促进法》是事关人民群众切身利益、企业规范管理和经济又好又快发展的法律保障。现实生活中经常存在的企业不签劳动合同、滥设试用期、无故拖欠工资、经常加班加点的侵权行为就会得以制止，我国经济与社会法制化、规范化的发展从此进入了新阶段。为此，文章在认真学习和深入研究的基础上，从我国人力资源新法规实施的背景以及新法规的主要内容和实施重点等方面进行了分析和阐述，供有关部门和劳资双方进行参考。     

对会计信息公开制度的探讨

会计的首要目标是为企业的经营决策提供有用的信息,会计信息公开是适应市场经济发展要求,顺应会计的国际化要求,符合内外部使用者的利益要求,同时也满足企业自身发展的要求的必然,会计信息公开制度的建立和完善是会计发展的趋势,尽管存在着多方面的不足,更多的是需要我们去发现和解决问题,完善和规范我国的会计体系。本文主要从两方面入手...