An evaluation of the tandem configuration automated guided vehicle system

The performance of a tandem automated guided vehicle (AGV) system is compared with that of conventional AGV track systems. In the tandem system the track is divided into non-overlapping, single-vehicle closed loops. Using simulation it is shown that, because of trips requiring delivery across loops, the tandem system has a higher expected travel time per load and thus a greater average time in system. When the loads are delivered within the original loop only, the tandem system has a lower average time in system than in conventional systems, although the difference is modest. Track layout appears to influence the average time in system much more than docs the dispatching rule invoked. The success of the tandem system is highly dependent on approximately even AGV utilization, which may be difficult to obtain in practice.     

关于留数定理的一个推广

研究了留数定理的有关问题,通过举例论证和归纳推理等证明方法,得到了单个留数定理的一个推广结论,最后将此结论应用于一些积分问题中.     

Asymptotocally nonparametric tests with censored paired data

A class of asymptotically nonparametric test with contains a test proposed by Wei(1980), is considered for testing the equality of two continuous distribution funcitons when paired observations are subject to arbitrary right censorship. It is shown that under the null hypothesis each test statistic converges in distribution to the standard normal random variable. Furthermore. the Monte Carlo simulation results indicate that some tests in this class are more powerful than Wei's test. A generalization to incomplete censored paired data is also included.     

宋代书籍设计、插图及美学特征

宋代雕版书籍之设计一般而言体现出朴实之显著特色。这同雕版技术及雕版书籍最早发明于中国民间及其农业文化具有渊源关系。宋代奠定的这种朴实的书籍形制设计理念,使得书籍得以广泛传播,真正成为一种空间意义上的大众媒介。宋代确立了雕版印刷术普遍采用后中国书籍的基本形制。宋代雕版书籍确立了书籍史上最早的平装典范。宋刻书籍,采用不同字体、不同字号以及特殊的标识符号区分或标示不同的编辑语言,使版面上的编辑语言及其功能十分明确。这种编辑语言及其书籍体例奠定了中国古代雕版书籍版面编辑语言的基本格局,为之后中国雕版书籍一直沿用。宋代书籍插图已比较普遍。插图的普遍应用,使得宋版书籍图文并茂,不仅书籍内容更加完整,意义更加丰富,而且书籍的视觉效果和阅读效果也更加理想,书籍文本知识和意义的传播也由此变得更加生动、直观、多彩。宋版书籍最入目者,正是其风神别具——没有二种书籍书刻之字体完全相同者——正字书体的美。宋代书籍之美,乃在于其书籍内在的宋代文化精神之美。     

论唐君毅早期思想中的生死问题意识

唐君毅作为一位早慧型的哲学家,在早期生活经历中就有了多次对生死离别之事的强烈感受和生命体验;在他早期的思想创造中,这些体验形成了他自觉的生死问题哲学意识和生死哲学思想;这些意识和思想贯彻其终身,构建出一套完整的儒家生死哲学系统。     

民族高校普通话教学的困境及对策

作为＂四用语＂的《普通话》对于师范院校的学生来说,不仅是一门专业必修课,更是一门基础技能训练课。然而目前很多高校的普通话教学现状令人堪忧,尤其是民族高校的普通话教学存在的问题就更多。在针对教学中遇到的困难、存在的问题及背后的原因、解决的办法等方面做了大量的调查、走访、研究的基础上,提出自己的观点,供今后民族高校的普通话教学参考。     

民营经济与赫哲族社会发展

赫哲族民营经济仍处于发展的起步阶段,破解影响民营经济发展的症结问题已经成为赫哲地区社会发展的关键所在,只有在转变发展理念、创新发展模式和提高发展质量上狠下工夫,民营经济才能实现又好又快发展。     

青藏高原地区与东部发达地区区域经济合作若干法律问题研究

本文以青藏高原地区与东部发达地区区域经济合作为切入点,以法治化为视角,对青藏高原地区经济一体化的必然性、法律特征以及青藏高原地区与东部发达地区区域经济合作的若干法律问题进行了初步探讨,并提出了相关法律对策建议。     

青海藏汉双语教学调研报告

本文对青海藏区双语教学现状、存在问题及相关情况进行了综合分析,提出了双语教学对策措施及建议。     

Revenue Management vs. Newsvendor Decisions: Does Behavioral Response Mirror Normative Equivalence?

We study and compare decision‐making behavior under the newsvendor and the two‐class revenue management models, in an experimental setting. We observe that, under both problems, decision makers deviate significantly from normative benchmarks. Furthermore, revenue management decisions are consistently higher compared to the newsvendor order quantities. In the face of increasing demand variability, revenue managers increase allocations; this behavior is consistent with normative patterns when the ratio of the selling prices of the two customer segments is less than 1/2, but is its exact opposite when this ratio is greater than 1/2. Newsvendors' behavior with respect to changing demand variability, on the other hand, is consistent with normative trends. We also observe that losses due to leftovers weigh more in newsvendor decisions compared to the revenue management model; we argue that overage cost is more salient in the newsvendor problem because it is perceived as a direct loss, and propose this as the driver of the differences in behavior observed under the two problems.