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TNT装药爆炸 1

不闭合等高线 1

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等高线树 1

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Distribution of background equivalent static wind load on high-rise buildings

Jianguo ZHANG , Ming GU ,

《结构与土木工程前沿（英文）》 2009年第3卷第3期页码 241-248 doi: 10.1007/s11709-009-0036-z

摘要： In this paper, the along-wind and cross-wind fluctuating load distributions along the height of high-rise buildings and their correlations are obtained through simultaneous pressure measurements in a wind tunnel. Some typical methods proposed in some relative literatures, i.e., load-response correlation (LRC), and quasi-mean load (QML) and gust load envelope (GLE) methods, are verified in terms of their accuracy in describing the background equivalent static wind load distribution on high-rise buildings. Based on the results, formulae of the distribution of background equivalent static load on high-rise buildings with typical shapes are put forward. It is shown that these formulae are of high accuracy and practical use.

关键词： high-rise buildings along-wind cross-wind background equivalent static wind load close formulae

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Characterising populations living close to intensive farming and composting facilities in England

《环境科学与工程前沿（英文）》 2021年第15卷第3期 doi: 10.1007/s11783-020-1332-z

摘要：

• Bioaerosol emitted from farming and composting facilities may pose health risks.

关键词： Composting Intensive farming Bioaerosol Population characteristics Public health

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Atomic and close-to-atomic scale manufacturing—A trend in manufacturing development

Fengzhou FANG

《机械工程前沿（英文）》 2016年第11卷第4期页码 325-327 doi: 10.1007/s11465-016-0402-1

摘要：

Manufacturing is the foundation of a nation’s economy. It is the primary industry to promote economic and social development. To accelerate and upgrade China’s manufacturing sector from “precision manufacturing” to “high-performance and high-quality manufacturing”, a new breakthrough should be found in terms of achieving a “leap-frog development”. Unlike conventional manufacturing, the fundamental theory of “Manufacturing 3.0” is beyond the scope of conventional theory; rather, it is based on new principles and theories at the atomic and/or close-to-atomic scale. Obtaining a dominant role at the international level is a strategic move for China’s progress.

关键词： atomic manufacturing Manufacturing 3.0 Manufacturing 2025 Industry 4.0

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Stability and dynamics of rotor system with 45° slant crack on shaft

Yanli LIN, Xiaohui SI, Fulei CHU

《机械工程前沿（英文）》 2011年第6卷第2期页码 203-213 doi: 10.1007/s11465-011-0131-4

摘要：

Crack on a shaft is one of the common damages in a rotor system. In this paper, transverse vibrations are calculated to compare the influences of transverse crack and slant crack on the rotor system. Results show that the vibration amplitude of the rotor system with a 45° slant crack on the shaft is larger than that with a transverse crack when the two types of crack have the same depth and the rotor system runs in the same condition. Stability and dynamic characteristics of the rotor system with a 45° slant crack on the shaft under torsional excitation are analyzed by considering opening and closing of the crack. It is shown that the instability of the transverse vibration of the rotor system increases with increasing difference between the bending stiffness in two main directions, and the vibration is stable when the two bending stiffness are identical. The spectrum analysis of the steady-state response reveals that the gravity and the eccentricity produce different frequency components, and when the two bending stiffness are identical, the multiple frequency components of the torsional excitation disappear. Further investigation shows that the vibration amplitudes in combined frequencies increase rapidly in transversal, torsional, and axial vibration with increasing slant crack depth. The results are helpful for the understanding the dynamic behavior of a rotor system with a slant crack on a shaft and can be used for the detection of the slant crack on a shaft.

关键词： rotor dynamics slant crack stability torsional excitation open and close

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Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

《结构与土木工程前沿（英文）》 2019年第13卷第5期页码 1036-1053 doi: 10.1007/s11709-019-0535-5

摘要： Numerical manifold method (NMM) is an effective method for simulating block system, however, significant errors are found in its simulation of rotation problems. Three kinds of errors, as volume expansion, stress vibration, and attenuation of angular velocity, were observed in the original NMM. The first two kind errors are owing to the small deformation assumption and the last one is due to the numerical damping. A large deformation NMM is proposed based on large deformation theory. In this method, the governing equation is derived using Green strain, the large deformation iteration and the open-close iteration are combined, and an updating strategy is proposed. The proposed method is used to analyze block rotation, beam bending, and rock falling problems and the results prove that all three kinds of errors are eliminated in this method.

关键词： numerical manifold method rotation large deformation Green strain open-close iteration

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基于相邻关系的等高线树建立算法研究

郭沛沛,李成名,殷勇

《中国工程科学》 2013年第15卷第5期页码 42-46

摘要：

等高线树在提取地形线、地貌综合等方面具有重要的应用意义。常用的等高线树表达的是等高线的层次关系，直接表达等高线的包含和邻接关系，建树过程复杂，对数据要求较高，需要对数据进行预处理。本文将图幅内等高线按照是否闭合分为两类，分别对两类等高线群进行建树，最后将两个独立的等高线树合并，形成完整的等高线树。最后生成的等高线树表示了等高线之间的相邻关系，再借助其高程值就可以判断出等高线之间的包含邻接关系，算法容易理解，程序实现简单。

关键词：等高线树相邻关系高程值闭合等高线不闭合等高线

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机械与材料力学性能的三维全场变形与应变快速检测研究

梁晋,郭翔,胡浩,李磊刚,唐正宗,史宝全,孙涛

《中国工程科学》 2013年第15卷第1期页码 51-56

摘要：

提出并实现了一种基于工业摄影测量和数字图像的相关法，通过多种工业相机拍摄的多幅二维序列图像，快速解算出被测物体的三维坐标、变形和应变数据的方法。该方法解决了大型复杂工件生产现场快速检测难题，达到国际先进水平，可用于中小型工件和微纳米尺度工件的相关检测，以及材料性能分析，也可满足低速到高速的振动冲击和模态分析要求。在机械、材料力学等多个行业和多个学科的应用表明，该方法具有适用面广、三维全场检测、快速灵活方便的优点，取得了显著的经济和社会效益。

关键词：工业摄影测量数字图像相关法变形应变

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The role played by traditional Chinese medicine in preventing and treating COVID-19 in China

Qingwei Li, Han Wang, Xiuyang Li, Yujiao Zheng, Yu Wei, Pei Zhang, Qiyou Ding, Jiaran Lin, Shuang Tang, Yikun Zhao, Linhua Zhao, Xiaolin Tong

《医学前沿（英文）》 2020年第14卷第5期页码 681-688 doi: 10.1007/s11684-020-0801-x

摘要： Traditional Chinese medicine (TCM), an ancient system of alternative medicine, played an active role in the prevention and control of COVID-19 in China. It improved the clinical symptoms of patients, reduced the mortality rate, improved the recovery rate, and effectively relieved the operating pressure on the national medical system during critical conditions. In light of the current global pandemic, TCM-related measures might open up a new channel in the control of COVID-19 in other countries and regions. Here, we summarize the TCM-related measures that were widely used in China, including TCM guidelines, the Wuchang pattern, mobile cabin hospitals, integrated treatment of TCM and modern medicine for critical patients, and non-medicine therapy for convalescent patients, and describe how TCM effectively treated patients afflicted with the COVID-19. Effective TCM therapies could, therefore, be recommended and practiced based on the existing medical evidence from increased scientific studies.

关键词： traditional Chinese medicine COVID-19 Wuchang pattern mobile cabin hospital convalescent patients three formulae and three medicines

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真实空气中TNT装药爆炸近区冲击波传播特性研究

周丰峻,郑磊,孙云厚,张鏖,夏明

《中国工程科学》 2017年第19卷第6期页码 18-26 doi: 10.15302/J-SSCAE-2017.06.004

摘要：

本文基于点源爆炸理论，建立了面源、线源和点源TNT装药强爆炸解，填补了面源与线源强爆炸解的空白；采用真实空气状态方程进行分析计算，研究了真实空气条件下球形TNT装药爆炸近区冲击波的传播特性。通过算例分析，计算结果与已有文献资料数据吻合较好。本文的研究成果对爆炸力学和防护工程研究起到了重要的参考作用。

关键词： TNT装药爆炸真实空气状态方程面源装药线源装药点源装药抗爆防护

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通过分析目标制品间的紧密关系改进基于信息检索的需求追踪恢复 Research Articles

汪海娟1,沈国华1,2,3,黄志球1,2,3,俞垚慎1,陈凯1

《信息与电子工程前沿（英文）》 2021年第22卷第7期页码 957-968 doi: 10.1631/FITEE.2000126

摘要：需求追踪是一项重要且昂贵的任务，它创建了从需求到不同软件制品的追踪链。这些追踪链可以帮助工程师节约软件维护时间并降低维护复杂性。信息检索技术在需求追踪中应用广泛。它使用软件制品之间的文本相似性来创建链接。然而，如果两个制品不共享或仅共享少量单词，信息检索性能可能非常差。已有一些方法通过考虑目标制品之间的关系来增强信息检索，但它们仅限于代码，而无法应用于其他类型的目标制品。为克服这一局限，本文提出一种将信息检索方法与目标制品间的紧密关系相结合的自动化方法。具体地，我们增加了对目标制品间紧密关系的考虑，而不仅仅是从需求到目标制品的文本匹配。此外，在考虑目标制品间的关系时，该方法并不局限于目标制品的类型。我们在5个公共数据集上进行了实验，并考虑了需求和不同类型的软件制品之间的追踪链。结果表明，在相同的查全率下，5个数据集的查准率较之基线方法分别提高40%、8%、20%、4%和6%。5个数据集的查准率平均提高15.6%，这表明在相同条件下，本文所提方法优于基线方法。

关键词：需求追踪；信息检索；紧密关系；目标制品

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新冠病毒肺炎患者医学观察和救治集中隔离场所——感染风险最小化管控的中国武汉经验 Article

王先良, 王姣, 沈瑾, John S. Ji, 潘力军, 刘航, 赵康峰, 李莉, 应波, 樊琳, 张流波, 王林, 施小明

《工程（英文）》 2021年第7卷第7期页码 908-913 doi: 10.1016/j.eng.2021.03.010

摘要：

新冠病毒肺炎（COVID-19）疫情大流行给整个医疗系统带来沉重的负担，同时暴露出医疗系统对医疗资源和物理空间的极大需求，但是目前很少有研究探讨医疗资源和物理空间的高效利用。因此，本研究旨在总结中国在新冠病毒肺炎疫情期间用于医学观察和救治的集中隔离场所的经验，以期为进一步提升对确诊病例、疑似病例和密切接触者的管理水平提供建议。通过对三种类型的集中隔离场所（方舱医院、非定点医院和隔离宾馆）进行改建，对确诊和疑似病例进行了治疗和隔离。这些场所减轻了即时空间需求。此外，为了减小这些场所内的感染风险，监管机构和政府机构实施了新的设计、管理和预防措施，以最大限度减少感染风险。其他国家和地区可以借鉴中国武汉的实践经验，通过对社会资源进行优化配置来应对COVID-19疫情大流行。总之，为了应急响应，政府应该统筹分配社会资源，建设集中隔离场所；卫生机构应该发布集中隔离场所规定，对这些场所的日常管理予以高度重视；需要组建一支跨领域管理团队以支持集中隔离场所的日常运营；鼓励集中隔离政策的深入研究和国际合作。

关键词：集中隔离风险控制传染病患者密切接触者新冠病毒肺炎