客运专线预制箱梁后浇翼缘板施工技术

由于受隧道施工限界影响，客运专线双线整孔预制箱梁无法通过隧道，预制时先切除两侧部分翼缘板，待架设后再现浇切除部分翼缘板。介绍了切除翼缘板箱梁现浇施工支架的设计和关键施工技术，可为同类预制梁施工提供技术参考。     

二语习语词块的象似性理解与大学课堂多媒体语境教学

从分析词块、图式及象似性、语境、多媒体输入与二语习语理解的关系着手,以双解码理论及多媒体学习生成理论为基础,探讨了进行二语习语多媒体语境教学的可能性,并通过两周的教学实践及问卷调查进行多媒体习语语境教学的可行性测试。     

Efficiency of ranked set sampling in entropy estimation and goodness-of-fit testing for the inverse Gaussian law

When measuring units are expensive or time consuming, while ranking them is relatively easy and inexpensive, it is known that ranked set sampling (RSS) is preferable to simple random sampling (SRS). Many authors have suggested several extensions of RSS. As a variation, Al-Saleh and Al-Kadiri [Double ranked set sampling, Statist. Probab. Lett. 48 (2000), pp. 205–212] introduced double ranked set sampling (DRSS) and it was extended by Al-Saleh and Al-Omari [Multistage ranked set sampling, J. Statist. Plann. Inference 102 (2002), pp. 273–286] to multistage ranked set sampling (MSRSS). The entropy of a random variable (r.v.) is a measure of its uncertainty. It is a measure of the amount of information required on the average to determine the value of a (discrete) r.v.. In this work, we discuss entropy estimation in RSS design and aforementioned extensions and compare the results with those in SRS design in terms of bias and root mean square error (RMSE). Motivated by the above observed efficiency, we continue to investigate entropy-based goodness-of-fit test for the inverse Gaussian distribution using RSS. Critical values for some sample sizes determined by means of Monte Carlo simulations are presented for each design. A Monte Carlo power analysis is performed under various alternative hypotheses in order to compare the proposed testing procedure with the existing methods. The results indicate that tests based on RSS and its extensions are superior alternatives to the entropy test based on SRS.     

Preliminary test estimators in double sampling with two auxiliary variables

An attempt has been mads to suggest some estimators for population mean in double sampling with two auxiliary variables., alternative to the usual regression estimator. When the experimenter has partial Information about the mean of the auxiliary variable or variables, preliminary test estimators can be used. The bias, mean square error, relative efficiency and optimum allocation of sample sizes are obtained for the suggested estimators.     

从《紫色》看非裔美国人的两难境地

解读了美国当代黑人女作家艾丽丝.沃克的作品《紫色》,深刻分析处于美国边缘地位的非裔美国人如何正确认识自身的社会地位,即在白色崇美主义的洪流中和面对与自己拥有相同肤色种族的同胞时,具有双重意识的他们所处的两难境地。     

浅谈航海教育“双证书”一体化教学——以轮机工程技术专业为例

高等职业技术教育的教学目标之一是使学生获得相应职业岗位的胜任能力，实行学历证书和职资格证书双证制教育，并将职业资格作为人才质量的重要标志之一。航海类“双证书”就是指教育主管部门颁发的学历证书和国家海事局颁发的海船船员适任等级职业资格证书。文中以轮机工程及专业为例。探讨了如何建立有效的“双证书”衔接的教学运行机制。     

“双证书”制度在实施中存在的问题及解决对策

"双证书"制度在促进高职院校毕业生就业和引导劳动者素质提高过程中,发挥了极大的作用,对提高高职院校教育教学质量的作用也日趋明显。但是,"双证书"制度在我国推行十几年来,仍存在诸多需要亟待解决的问题。这些问题的存在严重影响了"双证书"制度在高职院校的落实和执行。文章对这些问题逐一进行了分析,并提出了相应的对策。     

Generalized linear models with random effects in the two-parameter exponential family

In this paper, we develop a new class of double generalized linear models, introducing a random-effect component in the link function describing the linear predictor related to the precision parameter. This is a useful procedure to take into account extra variability and also to make the model more robust. The Bayesian paradigm is adopted to make inference in this class of models. Samples of the joint posterior distribution are drawn using standard Monte Carlo Markov Chain procedures. Finally, we illustrate this algorithm by considering simulated and real data sets.     

青兰高速公路鼓山隧道施工技术

青兰高速（邯郸至涉县段）鼓山隧道属于三车道大跨度扁平隧道，围岩地质情况复杂，施工难度大，安全风险高，工期紧。通过超前大管棚进洞和建议性双侧壁导坑法、建议性单侧壁导坑法以及传统的台阶法等不同开挖方法，通过监控量测数据分析做保证，顺利完成施工任务，确保施工安全及质量。     

Price Inference in Small Markets

This paper investigates the effects of market size on the ability of price to aggregate traders' private information. To account for heterogeneity in correlation of trader values, a Gaussian model of double auction is introduced that departs from the standard information structure based on a common (fundamental) shock. The paper shows that markets are informationally efficient only if correlations of values coincide across all bidder pairs. As a result, with heterogeneously interdependent values, price informativeness may not increase monotonically with market size. As a necessary and sufficient condition for the monotonicity, price informativeness increases with the number of traders if the implied reduction in (the absolute value of) an average correlation statistic of an information structure is sufficiently small.