高维单形中Gerber不等式的加细

设En中n维单形Ωn(A)=cinυ{A0，A1，…An}的n维体积以及侧面的n-1维体积、棱长、高线长、中线长、外接超球半径分别为V，Fk，ρij，h k，m k，R，Ωn(A)内任一点P至侧面Fk的距离为dk，本文证明了存在仅与维数n有关的绝对常数 n，βn，γn，θn，μn，ξn，ρn，σn，φn，ψn，ωn，满足不等式链：     

中国股市交易量与收益波动关系的实证分析

本文首先将交易量分解为信息交易量与非信息交易量,然后分别将信息交易量与非信息交易量加入GARCH模型,分析不同性质的交易量对波动性的解释能力以及信息冲击对收益波动的影响。结果发现,信息交易量比非信息交易量对收益波动的影响更强,且信息冲击对收益波动的影响十分显著,投资者对信息到达的反应存在一个调整的过程。     

《青楼集》发覆

《青楼集》是元代一部记述歌妓的书，同时又是中国戏曲理论发展史上一部重要的论著。它的价值在于提出或反映了元杂剧的社会功能、元杂剧的分类、元杂剧在南方的流行、戏曲演员的评价标准、戏曲演员的生活状况等戏曲史上的重大问题，应该引起我们足够的重视。     

Influence of baffle position on liquid sloshing during braking and turning of a tank truck

The influence of baffle position on liquid sloshing during the braking and turning of a tank truck was studied using a volume of fluid (VOF) model. The forces,their positions and weight distribution during braking and the forces and rolling moment during turning were calculated. The reliability of the calculation method was validated by comparisons with experimental results. The results showed that during braking,liquid splashes in the tank and the maximum forces and G (the ratio of weight acting on the front axle to the rear axle) are large when A (the ratio of the arch area above the baffle to the area of cross section)≤0.1. When A≥0.2,as the position of the baffle is lowered,the maximum of Fx (the force in direction x) first decreases then increases,and the maximum of Fy (the force in direction y) and G increase. During turning,liquid splashes in the tank and the maximum forces and M (the rolling moment) are large when D (the ratio of the arch area above the baffle to the area of cross section)≤0.2. When D≥0.3,as the position of the baffle is lowered,the maximums of Fy,Fz (the force in direction z) and M increase.     

减小喷油器压力波动的仿真研究

为减小喷油器容积腔内的压力波动,提高高压共轨喷油器喷射的稳定性,基于系统仿真软件AMEsim建立喷油器模型,分别对普通喷油器和储压喷油器进行仿真计算,并作比较。结果表明,在喷油器进油口处增加储压器能使容积腔内的压力波动明显减小。这可为喷油器的设计与开发提供依据。     

溴化镧探测器在伽马测井应用中的MC研究

本文利用蒙特卡罗方法模拟实际测井过程,模拟地层中1.76MeV伽马射线经过几种不同材料探管以及不同尺寸溴化镧晶体的能谱。通过分析峰总比可以看出,用铍、镁铝合金作为溴化镧探测器探管并不能够有效地提高全能峰计数率,增大溴化镧晶体体积,能够有效提高峰总比。     

Electronic data interchange usage in China's healthcare organizations: the case of Beijing's hospitals

China has long since realized the potential benefits of adopting electronic data exchange. In particular, the Chinese government is promoting the usage of electronic data interchange (EDI) in healthcare organizations. However, little research has described the current status of EDI usage in these organizations. This study investigates the extent of EDI usage in Beijing's hospitals along four dimensions: volume, diversity, breadth, and depth. The results from 57 hospitals show that EDI usage is in its very early stages. The study provides possible reasons for the low EDI usage from cultural, economic, and technological perspectives, analyzes the differences of EDI usage in the different levels of China's hospitals, and suggests strategies to promote EDI usage in China's healthcare organizations.     

樊增祥诗文四篇补遗

樊增祥平生致力于诗,篇什宏富,刊有《樊山集》、《樊山续集》等,然散佚亦在所难免。杨钟羲为晚清著名学者、诗人,撰有《雪桥诗话》四集,内容宏富,为清代文学文献之渊薮;《雪桥自订年谱》多记录当时学界交往,收有樊增祥数篇诗文,其中四篇不见于樊山已刊诗文集中,今摭拾于此,略加整理,以备征文考献,有助于对当时学界之了解。     

地方通史的经典之作——关于《苏州通史·中华人民共和国卷》

《苏州通史·中华人民共和国卷》堪称是一部“地方通史的经典之作”,其主要价值体现在它的现实意义、文化意义、政治意义及学术意义四个方面。它的成功编纂,对编写地方通史著作有着规范性意义:要处理好微观与宏观、个案与整体等方面的辩证关系,在突出地方特色和元素的同时,深刻、准确地揭示其典型价值。沿着已有的成功之路,继续进行不断的研究和探索,本书中存在的不足之处将会被逐步克服。     

扩大读者借阅量的成功尝试

通过分析、比较相关统计数据,认为在有充裕的馆藏及电子资源作保障的前提下,大幅度扩大读者的借阅量有利于进一步提高图书流通率和藏书利用率,满足读者更多的信息需求。