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粒子身份标签；概率假设密度；交叉眼干扰；抗干扰；随机有限集；单脉冲雷达 1

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A hypothesis for crack free interior surfaces of Longyou caverns caved in argillaceous siltstone 2000

Zhong Qi YUE, Shaopeng FAN, Zhifa YANG, Lihui LI, Luqing ZHANG, Zhongjian ZHANG,

《结构与土木工程前沿（英文）》 2010年第4卷第2期页码 165-177 doi: 10.1007/s11709-010-0018-1

摘要： Five complete caverns were discovered in Longyou in 1992. They were manually caved in argillaceous siltstone at shallow depths more than 2000 years ago. When they were un-watered, their integrity was maintained completely, and their interior rock surfaces were free of old cracks. Since then, however, the rock’s interior faces have initiated and propagated more and more cracks. This paper attempts to address the question of why the rock interior faces were free of old cracks once they were unearthed. To address this question, this paper proposes a hypothesis that the argillaceous siltstone has the ability of self-healing its cracks over a short period of time under weak acid water environment. Data and evidence are presented herewith to prove the hypothesis. They include observations and measurements in the field and test results in the laboratory. Specifically, a three-point bending test is used to form a tensile crack in a rectangular rock specimen and a dead load test for the specimen immersed in initially weak acid water is used for self-healing its crack. The results have shown that the argillaceous siltstone is in a state of weak alkalinity and the rain water at the site is in a state of weak acidity. Therefore, when it is immersed in weak acid water for some time, the argillaceous siltstone would be able to make chemical reactions to generate new minerals such as calcite. The new minerals would be able to infill the cracks and then heal the crack within a few years. Once the crack is self-healed, the rock can regain its strength and integrity. Consequently, the rock interior surfaces could be free of old cracks when the water was pumped out of the caverns.

关键词： rock cavern grotto Longyou argillaceous siltstone crack water environment self-healing

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安全理论基本假说

于海湧,李芳

《中国工程科学》 2006年第8卷第10期页码 85-88

摘要：

通过大量事故案例及对现有安全理论的分析，将所有事故分为3类：自然事故、随机事故和人为事故，根据这3种事故的特点采用数学方程进行描述、量化，从数学模型角度论述事故发生的必然性、随机性和可预防性，以及不安全的绝对性和安全的相对性的辩证关系。同时根据数学模型提出了完整的、科学的事故预防基本对策。

关键词：安全理论事故类型数学方程事故预防

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Feasibility analysis of mixed-income housing in China

TIAN Ye, BI Xiangyang, LI Dexiang

《结构与土木工程前沿（英文）》 2007年第1卷第3期页码 371-377 doi: 10.1007/s11709-007-0050-y

摘要： In this paper, it is demonstrated that mixed-income housing is a feasible and beneficial pattern nowadays. This pattern is propitious for good living and harmonious development of society. Based on practice, data are gathered from the field, and the social investment and social distance analysis of the social network theory are used from the perspective of cross-disciplinary fields. The hypothesis is tested and the feasible and beneficial characteristics of mixed-income housing are pointed out.

关键词： beneficial distance analysis harmonious development hypothesis perspective

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Review on ranking and selection: A new perspective

L. Jeff HONG, Weiwei FAN, Jun LUO

《工程管理前沿（英文）》 2021年第8卷第3期页码 321-343 doi: 10.1007/s42524-021-0152-6

摘要： In this paper, we briefly review the development of ranking and selection (R&S) in the past 70 years, especially the theoretical achievements and practical applications in the past 20 years. Different from the frequentist and Bayesian classifications adopted by Kim and Nelson (2006b) and Chick (2006) in their review articles, we categorize existing R&S procedures into fixed-precision and fixed-budget procedures, as in Hunter and Nelson (2017). We show that these two categories of procedures essentially differ in the underlying methodological formulations, i.e., they are built on hypothesis testing and dynamic programming, respectively. In light of this variation, we review in detail some well-known procedures in the literature and show how they fit into these two formulations. In addition, we discuss the use of R&S procedures in solving various practical problems and propose what we think are the important research questions in the field.

关键词： ranking and selection hypothesis testing dynamic programming simulation

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材料塑性成形与热处理一体化工程的理论基础

徐祖耀

《中国工程科学》 2004年第6卷第1期页码 16-21

摘要：

材料塑性成形与热处理一体化工程的理论基础，主要为应力—相变—形变间冶金交互作用和力学交互作用的机制、建模以及组织与性能变化的模拟。以钢为例，介绍了应力下铁素体、珠光体相变的文献工作，并提出0.38C-Cr-Mo钢在应力下铁素体形成和珠光体相变的动力学模型以及组织变化的计算机模拟；讨论了Scheil相加性原则的不足及其修正途径；略述应力对钢中贝氏体相变及马氏体相变的影响；简介相场理论及其应用。对材料在应力下相变理论、建模与组织模拟的后续研究工作提出了展望。

关键词：塑性成形—热处理应力下相变相变建模组织模拟 Scheil原则相场理论

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基于知识库的知识发现（KDK）的结构模型与挖掘算法研究

杨炳儒,申江涛,陈泓婕

《中国工程科学》 2003年第5卷第6期页码 49-54

摘要：

从知识库中发现新知识KDK（knowledge discovery in knowledgebase）是一个新课题，它的成功将直接作用于大型知识库的构建，并将为解决目前机器学习的瓶颈问题——知识获取起到重要影响。笔者的主要工作是：基于知识库中事实的KDK归纳结构、算法及其验证；基于知识库中规则的KDK归纳结构、算法及其验证。

关键词：基于知识库的知识发现卡尔纳普归纳逻辑科恩归纳逻辑假设评估

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一种基于多目标模型的抗交叉眼干扰新方法 Research Articles

Zhi-yong SONG, Xing-lin SHEN, Qiang FU

《信息与电子工程前沿（英文）》 2019年第20卷第7期页码 988-1001 doi: 10.1631/FITEE.1800394

摘要：交叉眼干扰是一种电子攻击手段，它通过人为构造虚假目标并欺骗雷达对其进行检测和跟踪，从而导致单脉冲雷达产生角度误差。目前还没有能够有效对抗交叉眼干扰的方法。本文通过对交叉眼干扰详细的机理分析，在随机有限集框架下建立描述典型交叉眼干扰场景的多目标模型。将目标与干扰的特征差异以及交叉眼干扰的释放过程结合，提出一种基于概率假设密度多目标滤波器的抗干扰新方法。目标与干扰的特征差异以及干扰释放的过程信息可用于优化粒子的划分。将表征目标和干扰特性的粒子身份标签引入目标检测和跟踪流程，通过波束内目标数目的实时估计检测干扰的释放，通过粒子标签与估计状态之间的关联和传递实现真实目标与虚假干扰的身份辨别，从而在强干扰条件下实现对真实目标的准确跟踪。仿真结果表明，所提抗干扰方法具有很小的干扰检测延迟以及较高的目标状态估计精度。

关键词：粒子身份标签；概率假设密度；交叉眼干扰；抗干扰；随机有限集；单脉冲雷达

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标题作者时间类型操作

A hypothesis for crack free interior surfaces of Longyou caverns caved in argillaceous siltstone 2000

Zhong Qi YUE, Shaopeng FAN, Zhifa YANG, Lihui LI, Luqing ZHANG, Zhongjian ZHANG,

期刊论文

安全理论基本假说

于海湧,李芳

期刊论文

Feasibility analysis of mixed-income housing in China

TIAN Ye, BI Xiangyang, LI Dexiang

期刊论文