限幅自保护高温超导接收机前端研究

提出了一种新型的、具有限幅自保护功能的新型高温超导高性能接收机前端系统方案。采用将高温超导限幅滤波器前置于低噪放进行混合集成,利用高温超导限幅滤波器优异的滤波和限幅特性实现同时具有高灵敏度和自保护功能的接收机前端。实验结果表明该滤波器可以有效地保护后端的低噪放不被烧毁或阻塞。采用超导-常规电路混合集成工艺研制而成的限幅自保护高温超导接收机前端具有优异的接收灵敏度,总噪声系数小于0.7dB。     

浅议实变函数与数学分析间的联系

从两个不同的角度浅议实变函数与数学分析间的联系一、数学分析的内容与方法是研究实变函数的重要手段;二、用实变函数理论可以透视数学分析.     

Approach to normality of mean and M-estimators of location

The approach to normality of an estimate is displayed graphically by the nonlinearity in the derivative of the log density, and this nonlinearity is related to the accuracy of the normal approximation for the tail area. Using techniques from small-sample asymptotics, an alternate proof of the central limit theorem is given and same indices of tail behavior are examined.     

稳态光散射法测粒下限及其影响因素的讨论

在经典Ｍｉｅ散射理论基础上，讨论全方位稳态光散射法激光测粒仪测量粒径的下限及其影响因素，认为通过减小激光测粒仪的系统误差和增大探测的散射角范围，可降低测粒仪的测量下降。     

Profile upper Confidence Limits from Discrete Data

When the data are discrete, standard approximate confidence limits often have coverage well below nominal for some parameter values. While ad hoc adjustments may largely solve this problem for particular cases, Kabaila & Lloyd (1997) gave a more systematic method of adjustment which leads to tight upper limits, which have coverage which is never below nominal and are as small as possible within a particular class. However, their computation for all but the simplest models is infeasible. This paper suggests modifying tight upper limits by an initial replacement of the unknown nuisance parameter vector by its profile maximum likelihood estimator. While the resulting limits no longer possess the optimal properties of tight limits exactly, the paper presents both numerical and theoretical evidence that the resulting coverage function is close to optimal. Moreover these profile upper limits are much (possibly many orders of magnitude) easier to compute than tight upper limits.     

论中庸的伦理意蕴

孔子第一个明确提出“中庸”概念,并把“中庸”看作为“至德”。中庸,就是恪守中正之道、不偏不倚、无过无不及与中和之意。“中和”,是中庸的精髓。从伦理学层面看,中庸,在人与人、人与自然关系方面,追求“和而不同”的中和境界;在道德行为上,坚持“过犹不及”的理性精神;在道德选择上,发挥“随时而中”的权变智慧;在道德规范上,坚持“兼德而至”的辨证思维原则。     

Random regression models for human immunodeficiency virus ribonucleic acid data subject to left censoring and informative drop-outs

Objectives in many longitudinal studies of individuals infected with the human immunodeficiency virus (HIV) include the estimation of population average trajectories of HIV ribonucleic acid (RNA) over time and tests for differences in trajectory across subgroups. Special features that are often inherent in the underlying data include a tendency for some HIV RNA levels to be below an assay detection limit, and for individuals with high initial levels or high ranges of change to drop out of the study early because of illness or death. We develop a likelihood for the observed data that incorporates both of these features. Informative drop-outs are handled by means of an approach previously published by Schluchter. Using data from the HIV Epidemiology Research Study, we implement a maximum likelihood procedure to estimate initial HIV RNA levels and slopes within a population, compare these parameters across subgroups of HIV-infected women and illustrate the importance of appropriate treatment of left censoring and informative drop-outs. We also assess model assumptions and consider the prediction of random intercepts and slopes in this setting. The results suggest that marked bias in estimates of fixed effects, variance components and standard errors in the analysis of HIV RNA data might be avoided by the use of methods like those illustrated.     

The number of records within a random interval of the current record value

LetX ₁,X ₂, … be a sequence of i.i.d. random variables with some continuous distribution functionF. LetX(n) be then-th record value associated with this sequence and μ _n ⁻ , μ _n ⁺ be the variables that count the number of record values belonging to the random intervals(f−(X(n)), X(n)), (X(n), f+(X(n))), wheref−, f+ are two continuous functions satisfyingf−(x)<x, f+(x)>x. Properties of μ _n ⁻ , μ _n ⁺ are studied in the present paper. Some statistical applications connected with these variables are also provided.     

民事审判与行政审判之间的权限划分与协调问题探析

民事审判与行政审判之间的权限划分与协调问题相当复杂,关涉主管权限划分、审理顺序、判决效力之间的协调以及权限冲突四大方面。对此,不仅国外没有统一的制度模式,而且在理论界也存在着较大争议。因此,加强对该问题的基础理论研究并加强相关立法建设实有必要。     

论侵犯商业秘密罪

侵犯商业秘密罪是我国刑法知识产权犯罪中的一个罪名,该罪的客体是权利人的财产权及公平竞争的市场秩序;该罪的罪过形式只能是故意,过失不能构成该罪;在认定侵犯商业秘密罪时,应当注意罪与非罪以及该罪与盗窃罪、有关侵犯国家秘密的犯罪的界限.