Some statistical issues in weather experimentation

A number of topics of statistical methodology in weather modification are discussed. The time sequence of unit definition, classification and randomization is shown to affect the types of units that can be used validly, and this casts doubt on the value of blocking. Re-randomization (permutation) tests are recommended as the only reliable method of confirmatory inference for weather experiments. Some aspects of such tests are examined, including a procedure for multiple comparisons. The plague of multiplicity of tests is discussed and warned against. Doubts about cumulative evaluations of "all" experiment's are expressed. A case is argued for examination of some non-randomized seeding operations. Consid¬ering the dearth of randomized data, it is argued that careful evaluation of seeding operations should be undertaken.     

Canonical correlation analysis in the definition of weight restrictions for data envelopment analysis

This work investigates the use of canonical correlation analysis (CCA) in the definition of weight restrictions for data envelopment analysis (DEA). With this purpose, CCA limits are introduced into Wong and Beasley's DEA model. An application of the method is made over data from hospitals in 27 Brazilian cities, producing as outputs average payment (average admission values) and percentage of hospital admissions according to disease groups (International Classification of Diseases, 9th Edition), and having as inputs mortality rates and average stay (length of stay after admission (days)). In this application, performance scores were calculated for both the (CCA) restricted and unrestricted DEA models. It can be concluded that the use of CCA-based weight limits for DEA models increases the consistency of the estimated DEA scores (more homogenous weights) and that these limits do not present mathematical infeasibility problems while avoiding the need for subjectively restricting weight variation in DEA.     

言意差异意域的排斥与补充

汉语表达中的言意差异意域,具有丰富的表现形式及修辞作用,理解言意差异意域的方法有单向排斥、单向补充、双向互补、单向排斥补充、双向排斥补充。     

盛世才执政时期新疆区村制探析

盛世才执政时期,区村制在新疆实施,经历了三个阶段,不同阶段其任务也随之发生变化。前期重点是改定县治与增设县局,而县以下政权组织建设较少;中期则将工作重心放在划编区村上;后期则对区村组织机构与区村长相关事宜给予规范与完善。区村制是适应当时地方行政现代化需要而产生的,其使新疆基层政权组织首次得以健全,形成了县以下行政制度的科层化,并进而稳固了盛世才的统治。但正当区村制高速发展之时,由于盛世才政治立场的转变而中途为保甲制所代替。