Measurements Of In Situ Stress And Mining-Induced Stress In Beiminghe Iron Mine Of China

In order to obtain the distribution rules of in situ stress and mining-induced stress of Beiminghe Iron Mine, the stress relief method by overcoring was used to measure the in situ stress, and the MC type bore-hole stress gauge was adopted to measure the mining-induced stress. In the in situ stress measuring, the technique of improved hollow inclusion cells was adopted, which can realize complete temperature compensation. Based on the measuring results, the distribution model of in situ stress was established and analyzed. The in situ stress measuring result shows that the maximum horizontal stress is 1.75-2.45 times of vertical stress and almost 1.83 times of the minimum horizontal stress in this mineral field. And the mining-induced stress measuring result shows that, according to the magnitude of front abutment pressure the stress region can be separated into stress-relaxed area, stress-concentrated area and initial stress area. At the -50 m mining level of this mine, the range of stress-relaxed area is 0-3 m before mining face; the range of stress-concentrated area is 3-55 m before mining face, and the maximum mining-induced stress is 16.5-17.5 MPa, which is 15-20 m from the mining face. The coefficient of stress concentration is 1.85.

Development of novel EST-SSR markers in common carp by data mining from public EST sequences

Expressed sequence tags (ESTs) are a source for microsatellite development. In the present study, EST-derived microsatelltes (EST-SSRs) were generated and characterized in the common carp (Cyprinus carpio) by data mining from updated public EST databases and by subsequent testing for polymorphism. About 5.5% (555) of 10,088 ESTs contain repeat motifs of various types and lengths with CA being the most abundant dinucleotide one. Out of the 60 EST-SSRs for which PCR primers were designed, 25 loci showed polymorphism in a common carp population with the alleles per locus ranging from 3 to 17 (mean 7). The observed (H-O) and expected (HE) heterozygosities of these EST-SSRs were 0.13-1.00 and 0.12-0.91, respectively. Six EST-SSR loci significantly deviated from the Hardy-Weinberg equilibrium (HWE) expectation, and the remaining 19 loci were in HWE. Of the 60 primer sets, the rates of polymorphic EST-SSRs were 42% in common carp, 17% in crucian carp (Carassius auratus), and 5% in silver carp (Hypophthalmichthys molitrix), respectively. These new EST-SSR markers would provide sufficient polymorphism for population genetic studies and genome mapping of the common carp and its closely related fishes. (c) 2007 Published by Elsevier B.V.

面向XML文档的细粒度强制访问控制模型

XML文档存放的信息需要受到访问控制策略的保护.现有的一些面向XML文档的访问控制模型都是基于自主访问控制策略或基于角色的访问控制.高安全等级系统需要强制访问控制来保证系统内信息的安全.首先扩展了XML文档模型使其包含标签信息,并给出了扩展后的文档模型需要满足的规则.然后通过讨论XML文档上的4种操作,描述了面向XML文档的细粒度强制访问控制模型的详细内容.该模型基于XML模式技术,它的控制粒度可以达到文档中的元素或者属性.最后讨论了该模型的体系结构和一些实现机制。

hyo-xtm: a set of hyper-graph operations on xml topic map toward knowledge management

Knowledge management is a critical issue for the next-generation web application, because the next-generation web is becoming a semantic web, a knowledge-intensive network. XML Topic Map (XTM), a new standard, is appearing in this field as one of the structures for the semantic web. It organizes information in a way that can be optimized for navigation. In this paper, a new set of hyper-graph operations on XTM (HyO-XTM) is proposed to manage the distributed knowledge resources.HyO-XTM is based on the XTM hyper-graph model. It is well applied upon XTM to simplify the workload of knowledge management.The application of the XTM hyper-graph operations is demonstrated by the knowledge management system of a consulting firm. HyO-XTM shows the potential to lead the knowledge management to the next-generation web.

高性能的XML解析器OnceXMLParser

XML(extensible markup language)解析器是分析、处理XML文档的基础软件.研究高性能验证型XML解析器的实现.开发了支持3种解析模型的XML解析器OnceXMLParser,该解析器通过了严格的XML兼容性测试和API兼容性测试.OnceXMLParser具有轻量级体系结构并进行了多方面的性能优化,包括高效的词法分析、基于统计分析的自动机实现、合理的资源分配策略以及语言层次上的优化.性能测试结果表明,OnceXMLParser具有出色的解析性能.

高效XML验证技术的实现

XML解析器是分析、处理XML文档的基础软件。对XML解析器的高效验证技术进行了研究,实现了支持StAX接口的验证型解析器OnceStAXParser2.0。该解析器采用了多项性能优化措施,包括属性验证的高效实现、元素验证自动机的优化、基于统计的预测算法等。性能测试表明,在进行验证的条件下,OnceStAXParser2.0具有出色的解析性能。

基于DOM解析器的XML编辑器研究

DOM是一种独立于语言和平台的XML解析模型。给出了支持DOM核心模型和多种DOM扩展规范的XML编辑器ONCEXMLEditor的实现。ONCEXMLEditor具有高效的XML验证和序列化性能,同时提供给用户多种功能,包括按需遍历文档、提供上下文感知的编写环境、实时纠错、灵活的装载和序列化机制等。描述了ONCEXMLEditor的体系结构及其实现核心算法,同时给出了XML文档有效性验证和装载及序列化的性能优化策略。

支持StAX的高效XML解析器的设计与实现

StAX是JCP提出的一种新的XML解析方式,它提供给用户更多的解析控制权。本文给出了用于XML语法分析的下推自动机模型的设计以及StAX解析器OnceStAXParser的实现。OnceStAXParser在经过了严格的XML兼容性测试和StAXAPI兼容性测试之后,还从多个方面进行了性能优化,包括自动机实现优化、有计划的预分配和延迟处理策略以及适度封装策略等。性能测试数据表明,OnceStAXParser的吞吐量比SunSJSXP平均高5%,比BEAStAXRI平均高38%。

OnceSAXParser:一种高效轻量的XML解析器

通过优化XML词法和语法处理以及构造轻量级体系结构,实现了支持SAX的高效XML解析器――OnceSAXParser。文中还将OnceSAXParser与目前最流行的XML解析器Xerces进行了对比分析和性能测试,结果显示OnceSAXParser的性能比Xerces平均提高了27%以上。

一种基于XML的复合事件模型及其订阅语言

基于内容的Pub／Sub系统能够为大范围软件集成提供松耦合的、可扩展的集成能力，越来越引起人们的重视．现存的方法主要集中在对单一事件的匹配，缺乏对复合事件模型及其订阅语言的研究．针对此问题，文章给出一种基于XML事件的复合事件模型及其订阅语言，该模型包括事件时序逻辑模型和事件复合模式，并扩展了XML—QL语言得到复合事件订阅语言EXML—QL支持事件复合模型和模式；最后，依据该订阅语言的特点构造复合事件匹配算法，给出该算法的分析和验证．

基于XML的B2B电子商务构架

电子商务通过基于因特网事务自动化提高了企业业务处理效率和可靠性。目前主要有两种类型电子商务：企业对客户型（Business-to-Consumer简称B2C）、企业对企业型（Business-to-Business简称B2B）。B2C参与的对象只是企业和单个的用户，其实现相对容易；但是对于B2B，情况就不一样，因为B2B涉及到多个不同规模企业的参与，要参与企业之间的商务活动，同时还需要与企业内部信息系统（如ERP系统）相连接，保证这些企业能通过因特网实现自动交互。

CoPenML:基于XML的笔式用户界面构件体系结构

笔式用户界面在许多领域得到了广泛应用，但现有的笔式界面技术不能支持高层次、多领域的可视化界面制作，很难实现面向软件构件的重用．因而提出一个新的解决方案，面向构件的体系结构CoPenML．该方案基于XML语言抽象描述了笔式界面的配置组成．可用于快速生成界面原型及二次开发接口，并且在系统实现级以及场景图级两个层面上实现软件构件的重用．设计了CoPenML的体系结构并给出了界面描述语言规范．最后开发了基于CoPenML的笔式界面制作环境以及相关工具．结果表明该方案对于笔式用户界面制作是十分有效的．