高压水射流冲击特性分析及实验研究

本文应用流体力学基本原理给出了高压水射流冲击压力的基本关系式,进行了实验验证,得出了冲击压力随靶距、泵压的变化曲线。     

汕头市与其他较大市立法权比较研究

我国特区级市及较大市的立法权是一个全新的法域，值得研究。本文用比较分析的方法分析了汕头市应遵循的立法模式，提出了汕头市立法的基本构想。     

The evolution in China's fertility and an analysis of population development]

There have been numerous projections on China's population at the end of century. Their differences are due to different estimations on the effects of fertility determinants. 2 simulation models have been developed, both from micro and macro levels, to estimate the population at the end of the century on the basis of 6 different fertility patterns. 3 possible options for fertility patterns are discussed. 1.) The 1 child per family option means that every couple has 1 child by the year 1989, the population of China will be 1.2 billion in the year 2000. Even if this is a ideal situation, it would not be a feasible policy, as the pressure from the rural population to have more than 1 child has been increasing in recent years. Nevertheless, it is still possible for urban couples to accept having only 1 child. Therefore, encouraging more people to have 1 child should be held as a basic policy. 2.) Under the option of 2 children per family with 2 or 3 years of spacing, the total population in the year 2000 would be 1.2 - 1.4 billion, which is unacceptable in terms of the development situation. 3.) Following a differential fertility policy towards urban, rural, and minority populations would mean that urban couples would have 1 child, rural couples whose first child is a girl or those who are in special circumstance would have 2 children. Minorities would have 2 or 3 children. AMong the above options, number 3 is more likely to be achieved in view of current socioeconomic, cultural, and demographic factors.     

科学发展观对马克思主义文明观的贡献与发展

文明是人类自身在生存和发展过程中劳动和创造的结果。在人类社会发展的历史长河中,有过违背历史规律的愚昧,但引领人类成长的是社会文明成果。科学发展观是中国在进入新的历史时期经济社会发展的指导思想,也是对马克思主义文明观的新贡献与发展。它的丰富的思想内涵,是与马克思主义一脉相承的,是对马克思主义文明观的进一步发展,为马克思主义文明观作出了新的贡献,必将为构建和谐社会,建设全面小康社会,实现中国的富强、民主、文明,发挥不可低估的重要作用。     

对中国引进FDI规制问题的探讨

外商对华直接投资(FDI)尤如一把双刃剑,给中国经济带来了双重的影响。近些年来,大量引资的负面效应开始显现。因此对中国引进的FDI进行规制,提高其利用效率就成为目前函待解决的一个理论和实践问题。本文以引资产生的负面效应为出发点,对中国引进FDI规制问题的具体内容进行了分析和探讨。     

Interspecies Extrapolation of Physiological Pharmacokinetic Parameter Distributions

Three methods (multiplicative, additive, and allometric) were developed to extrapolate physiological model parameter distributions across species, specifically from rats to humans. In the multiplicative approach, the rat model parameters are multiplied by the ratio of the mean values between humans and rats. Additive scaling of the distributions is denned by adding the difference between the average human value and the average rat value to each rat value. Finally, allometric scaling relies on established extrapolation relationships using power functions of body weight. A physiologically-based pharmacokinetic model was fitted independently to rat and human benzene disposition data. Human model parameters obtained by extrapolation and by fitting were used to predict the total bone marrow exposure to benzene and the quantity of metabolites produced in bone marrow. We found that extrapolations poorly predict the human data relative to the human model. In addition, the prediction performance depends largely on the quantity of interest. The extrapolated models underpredict bone marrow exposure to benzene relative to the human model. Yet, predictions of the quantity of metabolite produced in bone marrow are closer to the human model predictions. These results indicate that the multiplicative and allometric techniques were able to extrapolate the model parameter distributions, but also that rats do not provide a good kinetic model of benzene disposition in humans.     

线性电路的两个性质及其应用

本文提出了两个线性电路的性质,一个是利用变换受控源控制变量的方法,将受控源的输出特性改造成支路特性的形式,这样,受控源可用一条含源支路等效代替,另一个是支路移位的概念,按照这一概念,在电路中可以断开任一支路,或者,将两个回路间的公共支路一劈为二,而不改变电路的工作状态。掌握了上述的电路性质为分析电路增添了可供选择的方法。     

The family planning law should be issued as soon as possible]

China is facing a baby boom in the next ten years. Now is a perfect time to formulate legislature on family planning (FP) to strengthen the current policy and regulations in order to slow the momentum of excessive population growth. As a result of current economic reform and implementation of the rural household responsibility system, the migrant population has increased tremendously. The fact that millions of rural farmers are shifting to non-agricultural areas created new challenges to the effectiveness of traditional measures of the FP program. Promulgating laws and legislature will facilitate the job of FP. The law should stress the restriction of population growth and encouraging one child per couple. In the rural area it is not feasible to implement the one child policy indiscriminately. Under the policy of one child for a majority of the couples, no third birth is permitted. Local governments should be given the authorization to grant permission for second births for special cases within the birth planning quota. Allowing people living in poor and less developed areas to have more children and granting mothers of handicapped children permission to have an additional child were in fact facilitating the deterioration of the quality of the population. Some current policy in rural income distribution and social welfare was beneficial to large-sized family. Such policies should be changed to give incentives to small-sized families.     

货币投放的动态模型及最佳投放量预测

本文运用控制理论和计量经济学方法建立了货币投放的动态模型,并研究了模型的输出能控性、稳定性和货币最佳投放量问题。这里货币投放的目标是使工农业总产值规划得以完成,并使财政收支基本平衡和物价适度稳定。最后给出了山东省“八五”期间货币投放的最优控制序列。     

高校就业网站的发展研究

互联网改变了人们的生活,也引发了人们思想观念的变革。高校应从自身实际出发,开发具有自身特色的就业网站,并在发展中不断进步,最终实现与市场接轨的战略性发展。