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961.
962.
Judah Rosenblatt D.L. Jackson W.P. Dole W.L. Thompson 《Journal of statistical planning and inference》1983,8(3):281-300
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. 相似文献
963.
964.
M. E. Bock P. Diaconis F. W. Huffer M. D. Perlman 《Revue canadienne de statistique》1987,15(4):387-395
We study the behavior of the tail probabilities of weighted averages of certain independently and identically distributed random variables as the weights are varied. We show that the upper and lower tails are smallest when all the weights are equal. Our results apply to exponential, chi-squared, gamma, and Weibull random variables. 相似文献
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966.
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968.
Richard W. Barker 《Children & Society》1996,10(1):28-39
The different agencies and professions that contribute towards child protection services have all recently had to begin to take account of the impact of market forces on their activities, yet detailed consideration of the consequences of this are slow to emerge. This article begins to consider these changes for child protection services. Having briefly described the child protection systems in England and Wales, it looks at the theoretical underpinning to the market forces approach which has become a significant ideological position in respect of public services in the UK and increasingly throughout the world. The article then considers the impact of a market forces approach on the organization of child protection services in relation to coordination versus fragmentation, profit versus professionalism, planning versus short-termism, and cooperation versus competition. It concludes that the argument that a market forces approach to child protection will lead to greater efficiency in relation to protecting children is a chimera. The article is thus of relevance for the different professions who contribute to child protection services in all countries where a market approach to public welfare is being suggested or implemented. 相似文献
969.
The issue of cultural diversity presents clinicians with both delemmas and opportunities. To deal with such a challenge, I have proposed a constructivist approach to the help-seeking process of clients from diverse ethnoracial backgrounds. A model of clients' help-seeking processes provides a useful and systematic frame for clinicians to understand clients' construction of their problem situations and possible solutions. It provides a useful key for clinicians non-presumptuously to understand clients' subjective experiences, and to enhance clients' ability to resolve problems. 相似文献
970.
Reducing the risk of AIDS through methadone maintenance treatment 总被引:13,自引:0,他引:13