Meningococcal serogroup B outbreak response University of Wisconsin-Madison

A meningococcal serogroup B (MenB) outbreak at a large public university prompted an emergency response to immunize undergraduates. Objective: To report on a successful meningococcal serogroup B (MenB) vaccine clinic response at a large public university. Methods: We assembled the team leaders to write this case report. Results: Activation of the emergency plan and points of dispensing required cooperation of many units on campus under the leadership of university health officials with support from Centers for Disease Control and Prevention, state division of public health and the city-county health department. Significant efforts to provide consistent messages to students and parents regarding the outbreak and the availability of the MenB vaccines were made. Volunteers were recruited to staff the clinics alongside university healthcare providers. Over 22,000 doses of vaccine were administered. Conclusion: We report our experience and lessons learned which may be helpful to universities in preventing and responding to disease outbreaks.     

Numerical evaluation of tests based on different heteroskedasticity-consistent covariance matrix estimators

This article considers the issue of performing tests in linear heteroskedastic models when the test statistic employs a consistent variance estimator. Several different estimators are considered, namely: HC0, HC1, HC2, HC3, and their bias-adjusted versions. The numerical evaluation is performed using numerical integration methods; the Imhof algorithm is used to that end. The results show that bias-adjustment of variance estimators used to construct test statistics delivers more reliable tests when they are performed for the HC0 and HC1 estimators, but the same does not hold for the HC3 estimator. Overall, the most reliable test is the HC3-based one.     

A general approximation to quantiles

For many continuous distributions, a closed-form expression for their quantiles does not exist. Numerical approximations for their quantiles are developed on a distribution-by-distribution basis. This work develops a general approximation for quantiles using the Taylor expansion. Our method only requires that the distribution has a continuous probability density function and its derivatives can be derived to a certain order (usually 3 or 4). We demonstrate our unified approach by approximating the quantiles of the normal, exponential, and chi-square distributions. The approximation works well for these distributions.     

基于灰色系统的小型精密机床热误差模型

为减少热误差对数控机床加工精度的影响,文章利用灰色系统研究热误差建模。初步分析机床热源后,应用灰 色关联度分析结合模糊分类方法优化得到13组关键温度测点,结合小型精密五轴机床处于实际加工状态时的实验数 据,应用GM(I,N)灰色结构进行建模。将实际数据与拟合数据进行对比分析,结果表明此灰色系统模型具有计算方法 成熟、鲁棒性强的特点,适用于机床热误差研究。     

历史的重构与史学的转折——一个跨文化的考察

所谓史学中的转折点,指的是那些在某一历史时期、某一文化内产生了深远影响的历史观念和历史意识的根本性变化,这些转折点事实上也无不在史学史上发挥了跨文化的作用,历史文本也因而得以重构。1970年代末以来,我们已经目睹了诸多书写史学史时取用全球视角和比较方法的可贵尝试,历史学的范畴据之大为拓展,非西方史学也受到了越来越广泛的重视。而当今后现代主义对以科学史学和国家历史为典范的现代职业历史学的巨大挑战,极有可能为又一次重大的史学转折点铺下基石。     

基于经营杠杆和需求价格弹性的产品定价策略研究

在竞争的市场中，企业对应以何种价格将自己的产品推出，同时又不会加大其经营风险这一问题越发关注，本文通过将经营杠杆与需求价格弹性相结合，论述了比营杠杆及需求价格弹性对企业产品定价策略的指导作用。     

企业不同生命周期阶段创新着力点选择——基于层次分析法的探讨

本文通过分析企业不同生命周期阶段的创新着力点,构建了创新着力点评价模型;并采用层次分析法,结合实证分析,对各种创新着力点进行量化和排序,得出企业初创期和衰退期的重点是技术创新,成长期和成熟期的重点是管理创新的重要结论。     

我国中小企业融资约束与创新基点

在分析我国中小企业融资结构的基础上,通过实证研究论证了我国中小企业当前仍然面临着较为严重的融资约束问题,提出中小企业应增强自身的资本形成能力,扩大内源融资;与银行、政府、大企业保持良好的合作关系,发展外源融资;拓展集群融资、集合发债等作为融资的创新基点,构建多元化的融资体系。     

从释义到推论——余英时《朱熹的历史世界》史料解读献疑

余英时先生《朱熹的历史世界》一书重构两宋（尤其是南宋）政坛面貌,旁征博引,新见迭出,深得学界好评。然而通读全书,作者对若干史料的运用,似不无令人生疑之处。书中史料处理的疑点。主要可分为：字词含义、语段脉络、史料性质、推论程序四类。     

新农村建设“三点一面”工作体系的构建

一些发达国家的发展历程表明,在工业化、城市化进程中,都有一个新农村建设的过程,也正是这个过程推动了其经济发展的再次跨越。我国提出的社会主义新农村建设这一历史性课题,是一项长期而又复杂的系统工程。县域作为承载农村发展的前沿,是实验者,更是直接推动者。近年来,胶州市始终坚持以城乡统筹为基本思路、以城乡一体化为目标方向,探索形成了健全工作推进面、找准突破切入点、夯实经济支撑点、强化城乡统筹点的“三点一面”新农村建设工作体系,创新性地确立了新农村建设百项评价指标体系,全面推进了新农村建设,并获得了许多宝贵经验。