An Indentation Method for Nanoprecision Measurement of Diamond Tool Edge Radius

In ductile mode cutting of brittle materials using di amond tools, such as ductile cutting of silicon and quartz for wafer fabrication , one of the key conditions for achieving ductile chip formation is to get the r ight ratio of tool cutting edge radius to the undeformed chip thickness. It has been shown that the undeformed chip thickness has to be in the order of nanomete rs and that the tool cutting edge radius has to be smaller than the undeformed c hip thickness. Therefore, nanoprecision measurement ...     

Pre-training Assessment Through the Web

Web-based training is growing quickly in popularit y for professionals in industrial organizations and large enterprises. The savings in cost and time are significant. The instructor-led trainings are bounded by time and place, not to mention the cost involved in traveling, accommodation and training venue. However, in the most online training courses, all trainees are given same training materials and teaching paradigms. The problem of differentia ting the trainees‘ abilities is the main concern. We n...     

工程师与丑闻

本书作者对漏失通道理论发展的一个重要部分作了透彻的研究，同时对Karl yon Terzaghi教授光辉的一生及他遭遇的丑闻作了深入的考察。Karl yon Terzaghi在工程领域中被认为是现代土壤力学之父，直至他去世近40年的今天。许多地球技术工程师仍将他视作一个传奇，由于其在地质学研究方面的贡献，因此，他在地质领域也很有名气。     

LDCQ下的误差限制问题

提出了位置相关连续查询(LDCQ)中的误差限制的概念，误差可以是位置误差或者是时间误差．因为移动对象和查询边界实际相交的位置和时刻事先难以确定，所以一般采用预测相交点作为参照点．对选取合适的系统参数使之满足给定的误差限制进行了讨论，研究结果表明，可以选择预测相交时刻移动对象的位置和查询边界上预测相交点的实际位置到预测相交点的距离，或者选择它们之间的距离，使之满足给定的误差限制．     

Study on the pyroelectric properties of PLT/P (VDF-TrFE) nanocomposites

Lead lanthanum titanate (PLT) nanocrystalline powder prepared by the sol_gel process was incorporated into a polyvinylidene fluoride/trifluoroethylene (P(VDF_TrEF)) copolymer matrix to form PLT/P(VDF_TrFE) nanocomposites. The permittivities (ε) of the nanocomposites as a function of volume fraction of ceramic  were modeled using the Bruggeman model. The pyroelectric coefficients (p) and figure of merit (p/ε) were measured as functions of the poling field E. The nanocomposite has p and p/ε values higher than those of the copolymer, and has good potential in pyroelectric applications.     

Treatment outcome of localized Helicobacter pylori-negative low-grade gastric MALT lymphoma

AIM: To investigate treatment outcome of Helicobacter pylori (H.pylori )-negative low-grade gastric mucosaassociated lymphoid tissue (MALT) lymphoma.METHODS: In this study,we retrospectively reviewed the clinical outcome and clinicopathologic factors of stage Ⅰ E H.pylori -negative low-grade gastric MALT lymphoma cases from August 1998 to June 2009.RESULTS: A total of eleven patients with H.pylori -negative low-grade gastric MALT lymphoma were enrolled in the study and received anti-H.pylori eradication tre...     

数据中心拥塞控制研究综述

随着网络服务的逐渐普及,数据中心大量涌现,而现有的TCP拥塞控制机制并不适合于数据中心,研究人员提出了一系列面向数据中心的拥塞控制机制.介绍了数据中心的基本特征,深入分析了一些典型的算法,提出了今后的研究方向.     

凌叔华:对儒家宗法文化统治下的女性的观照

作为一位精通中西方文化的女作家，凌叔华对身处儒家宗法文化中的特殊女性群体——大家闺秀的生存处境有着自己深刻的洞察。她的作品通过对大家闺秀们外在和内在两个世界的剖析，表现了以男权为中心的儒家宗法文化对女性的深远影响。     

PHASE TRANSITION IN SEQUENCE UNIQUE RECONSTRUCTION

In this paper, sequence unique reconstruction refers to the property that a sequence is uniquely reconstructable from all its K-tuples. We propose and study the phase transition behavior of the probability P（K） of unique reconstruction with regard to tuple size K in random sequences （iid model）. Based on Monte Carlo experiments, artificial proteins generated from lid model exhibit a phase transition when P（K） abruptly jumps from a low value phase （e.g. 〈 0.1） to a high value phase （e.g. 〉 0.9）. With a generalization to any alphabet, we prove that for a random sequence of length L, as L is large enough, P（K） undergoes a sharp phase transition when p ≤ 0.1015 where p = P （two random letters match）. Besides, formulas are derived to estimate the transition points, which may be of practical use in sequencing DNA by hybridization. Concluded from our study, most proteins do not deviate greatly from random sequences in the sense of sequence unique reconstruction, while there are some ＂stubborn＂ proteins which only become uniquely reconstructable at a very large K and probably have biological implications.     

Anthropometric Study of the Physique of Hong Kong-Chinese Fire Services Recruits to Streamline the Sizing System

This research applies the principles of anthropometrics to improve existing size charts together with somatotyping techniques to define the physique of the Hong Kong-Chinese Fire Services recruits. The research results proved that age does not correspond with either body measurements or somatotype components. The results of the study demonstrates that the somatotype component (i. e., endomorphy, mesomorphy and ectomorphy) has low to moderate correlation with body girth and body length measurements.