技术进步与能源消费的相互作用

为研究技术进步和能源消费的相互作用,首先利用生产函数理论的Solow余值法给出了技术进步节能率的计算公式,然后通过对中国和美国的技术进步节能率的测算和对比分析,说明了中国的技术进步还有待进一步深化,最后应用生命周期理论分析了能源技术进步的演化方式。     

"批评工程"与"批评之罔"

针对一般理论对批评自身的历史性缺乏反思的"批评之罔",新历史主义论证并实践了其"批评工程论".它盘诘批评语境的合法性并将批评活动自身"事件化";它考察批评的"划界"本质及其参与"社会能量流通"过程所发挥的社会文化功能;它强调批评活动构造和体验"不同版本历史"的实质并追求文学批评的"横向超越".这对我们在当代语境中重新进行批评定位具有重要的参考价值.     

关于物理学中“功”和“能”概念的思考

功和能是物理学中两个重要的概念,深刻地理解功和能的概念,熟练地运用功和能的关系来分析和解决物理问题,对于学好物理是极为重要的。     

高斯波包在截止波导中的传播

分析了电磁波传播时的超光速群速。对高斯波包在分段填充不同介质的波导中的传播情况进行了数值模拟,得到高斯波包通过截止区的群速和能速,并对其中涉及到的“超光速”问题作了一定的分析。通过模拟得出,在一定的截止区长度范围内和一定工作频率范围内,群速超过光速;并得到,波包的能量传播速度(能速)始终不会超过光速。     

回旋管及回旋潘尼管的动力学理论

本文发展了目前回旋管的动力学理论。用动力学方法,描述了回旋潘尼管的不稳定性机理,求解了偶极电流。这样,本文提出的理论,不仅可以更为精确地描写回旋管,而且可以描写新近出现的回旋潘尼管。     

REMARKS ON OPTIMAL INFERENCE FOR MARKOV BRANCHING PROCESSES: A SEQUENTIAL APPROACH

Use of a suitable stopping rule yields exact uniformly most powerful tests and minimum variance unbiased estimators of various parameters of a Markov branching model with or without immigration. The population model discussed includes the pure birth, simple epidemic, immigration-death, M/M/ 1 queue, linear birth-death and a branching diffusion process, among others, as special cases.     

反氢原子能级及光谱的经典定性研究

利用一种带相位因子的经典屏蔽Coulomb势,采用经典分析方法对反氢原子的能级和光谱给出了预言性的描述,结果发现其能级与光谱同氢原子有较大区别。在反氢原子中主量子数n小于1的分数值且正电子由基态跃迁到激发态时才产生光谱,与氢原子发光机制正好相反。     

STEIN'S METHOD AND THE BERRY-ESSÉEN THEOREM

Stein's method is used to prove the Lindeberg-Feller theorem and a generalization of the Berry-Esséen theorem. The arguments involve only manipulation of probability inequalities, and form an attractive alternative to the less direct Fourier-analytic methods which are traditionally employed.     

The Risks of Using Nuclear Energy Sources in Space: Some Lay Activists'Perceptions

A combination of directive and nondirective techniques was used to study the mental models of 30 lay activists regarding the risks of nuclear energy sources in space. Respondents'perceptions were compared with an "expert model" of the processes generating and controlling these risks, in terms of both the substance of their beliefs and several statistical measures of their performance. These analyses revealed a complex pattern of strengths and weaknesses. Their details are used to derive recommendations for formulating messages about these risks.     

On uniform approximation of Poisson variates by normal ones

In this paper the accuracy of the normal approximation to the Poisson is treated from the viewpoint of direct approximation of Poisson variables by normal ones. The conclusions that are derived on the accuracy of this approximation lead (among others) to very useful results on confidence limits for the mean of a linear combination of independent Poisson variables; these latter are employed in precise determination of the composition of a mixture of radioactive isotopes by means of a scintillation counter.