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基于红外图像仪的建筑缺陷检测与识别研究

自动化与仪器仪表 2024年第4期 32-36页

作者：卜伟崔翔杨凌职业技术学院陕西杨凌712100 陕西省建筑科学研究院有限公司西安710003

为了提高对建筑外窗气密性与缺陷的检测及识别,研究利用红外热成像仪采集建筑外窗的红外图像,并对图像进行预处理,最后通过检测程序获得外窗缺陷的检测结果。结果表明,研究模型的最优回归线与理想回归线趋势基本一致,其相关系数R分别为0... 详细信息

为了提高对建筑外窗气密性与缺陷的检测及识别,研究利用红外热成像仪采集建筑外窗的红外图像,并对图像进行预处理,最后通过检测程序获得外窗缺陷的检测结果。结果表明,研究模型的最优回归线与理想回归线趋势基本一致,其相关系数R分别为0.99703、0.99737、0.99745、0.99711。实际检测建筑外窗单位面积空气渗透量与程序检测的相对误差均值为4.038%,表明研究的检测程序具有较高的检测精度。此次研究对降低外窗耗能、提升建筑节能具有一定参考价值。

关键词：红外热成像建筑外窗缺陷检测灰度化处理 Roberts算法

Investigating the mechanism of action of bu-Yang-Huan-Wu decoction in treating bleomycin-Induced pulmonary fibrosis through the epithelial-mesenchymal transition pathway

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Toxicology Advances 2024年第1期6卷 10-15页

作者： Yu-Ming Wang Han-Zhou Li Huan-Tian cui Yu-Hong Bian Graduate School Tianjin University of Traditional Chinese MedicineTianjin 301617China College of Integrated Traditional Chinese and Western Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China The First Affiliated Hospital Yunnan University of Chinese MedicineKunming 650500China

Background:To explore the effects and mechanisms of bu-Yang-Huan-Wu Decoction on pulmonary fibrosis in ***:Forty-five C57BL/6J mice were randomly divided into three groups:Control,Model,and bu-Yang-Huan-Wu *** fibrosis was elicited in mice through a solitary intratracheal administration of 2.5 mg/kg *** the control group,mice were given a solitary intratracheal administration of a comparable volume of *** began on the first day after the successful model establishment and lasted for 21 *** survival rate and body weight of the mice were recorded daily,and on the 22nd day,bronchoalveolar lavage fluid was collected to determine total cells and total *** wet/dry weight ratio of lung tissue and hydroxyproline were *** tissue pathology was observed using hematoxylin and eosin staining and Masson *** mRNA expression of epithelial-mesenchymal transition-related proteins(E-cadherin and vimentin)was detected by RT-qPCR,and their protein expression was analyzed by western ***:Compared to the model group,the bu-Yang-Huan-Wu Decoction treatment notably enhanced both the survival rate and body weight in pulmonary fibrosis mice,significantly reduced lung tissue wet/dry weight ratio,total cells,and protein in bronchoalveolar lavage fluid,and hydroxyproline *** pathological morphology of lung tissue was significantly improved,with increased expression of the epithelial cell marker E-cadherin mRNA and protein,and decreased expression of the mesenchymal cell marker vimentin mRNA and ***:bu-Yang-Huan-Wu Decoction can improve the degree of bleomycin-induced pulmonary fibrosis in mice by inhibiting epithelial-mesenchymal transition.

关键词： pulmonary fibrosis bu-Yang-Huan-Wu decoction epithelial-mesenchymal transition bleomycin

国图藏清彩绘本《直隶省津保一带淀河图》绘制时间考

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文献 2024年第2期 117-135,F0002页

作者：卜凡河北大学历史学院

国家图书馆藏清绢底彩绘本《直隶省津保一带淀河图》,在研究历史时期冀中平原地区与海河水系演变方面具有重要的参考价值。此前学界认为该图绘制于清光绪年间。通过对该图所绘永定河、子牙河及淀河等河湖水系与相关水利工程样态进行分... 详细信息

国家图书馆藏清绢底彩绘本《直隶省津保一带淀河图》,在研究历史时期冀中平原地区与海河水系演变方面具有重要的参考价值。此前学界认为该图绘制于清光绪年间。通过对该图所绘永定河、子牙河及淀河等河湖水系与相关水利工程样态进行分析考证,并与国家图书馆藏清光绪年间《天津至保定河图》对比可知,《直隶省津保一带淀河图》的绘制时间应在清乾隆十一年(1746)至乾隆十六年(1751)之间。该图是乾隆前期畿辅水利工程建设成果的直观记录。

关键词：《直隶省津保一带淀河图》乾隆时期冀中平原海河水系

传统荒政何以陷入救灾乏力的历史困境--基于灾害治理史的考察

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社会科学战线 2024年第7期 122-128页

作者：卜风贤陕西师范大学西北历史环境与经济社会发展研究院陕西西安710119

考察过去数千年灾荒史,可见历史灾害的发生具有多样性、频发性、周期性及灾情严重性等特点,从而导致灾害治理的国家化倾向;在灾情遍野的情况下,灾民群体出现了特殊的固化现象,自耕农和佃农沦为灾民的风险日渐提高。考究中国历史灾害发... 详细信息

考察过去数千年灾荒史,可见历史灾害的发生具有多样性、频发性、周期性及灾情严重性等特点,从而导致灾害治理的国家化倾向;在灾情遍野的情况下,灾民群体出现了特殊的固化现象,自耕农和佃农沦为灾民的风险日渐提高。考究中国历史灾害发生危害的原因,一是灾害知识积累中存在的大量非科学要素影响了防灾抗灾的实施效果,二是特定历史阶段灾害治理瓶颈制约了减灾成效。因此,灾害治理的根本出路在于发展科技,以提升应对自然灾害的知识水平和完善防灾抗灾措施,大力推行科技减灾的国家战略。

关键词：历史灾害国家治理灾民群体固化荒政体系化灾害知识分化

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先秦秦汉国家形态和国家治理的历史演变

历史研究 2024年第5期 68-89,M0004,M0005页

作者：卜宪群中国社会科学院大学历史学院

先秦秦汉是中国古代国家形态与国家治理的重要发展阶段。这一时期,国家结构不断"向内凝聚",君主权力逐步加强,分封制向郡县制转化,官僚制产生,国家形态与国家治理向大一统中央集权方向发展。秦汉时期,在建构大一统国家的历史实践中,出... 详细信息

先秦秦汉是中国古代国家形态与国家治理的重要发展阶段。这一时期,国家结构不断"向内凝聚",君主权力逐步加强,分封制向郡县制转化,官僚制产生,国家形态与国家治理向大一统中央集权方向发展。秦汉时期,在建构大一统国家的历史实践中,出现以君权为核心、分工合作、相互制衡的中央集权组织结构及其运作模式,以公天下、民本、德法相依为指导的治理理念与实践,以国家安全与民生保障为主旨的公共工程建设与社会政策措施。这些方面共同构成中国古代大一统国家的"治理型"特征,推动中华文明绵延不断发展至今,也为今天的国家治理提供历史借鉴。

关键词：先秦秦汉中华文明国家治理大一统中央集权

Introduction and Prospects of Gravity-1 Launch Vehicle’s Sea-Based Three Verticals Testing and Launch Mode

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Aerospace China 2024年第1期25卷 28-33页

作者： MA Ma bu Xiangwei HUANG Shuai WANG Yonggang Orienspace Technology(Shandong)Co. LtdBeijing 100076 School of Aerospace Engineering Tsinghua UniversityBeijing 100084

Gravity-1 was the world's first carrier rocket to adopt the sea-based “three vertical” testing launch mode. This article introduces the overall layout of the launch site and the workflow of rocket testing and launch for its maiden flight mission. The process of vertical assembly, vertical testing, vertical transportation, and sea-based hot launches are explained. Additionally, it provides an outlook on the improved “three vertical” testing and launch mode for future missions, such as land-based launches, rapid launches, and remote sea launches.

关键词： testing and launch mode overall layout vertical assembly vertical testing vertical transportation

Calculating the Excitation Temperature for H2CO Absorption Lines in Molecular Clouds

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Research in Astronomy and Astrophysics 2024年第7期24卷 271-274页

作者： Jia bu Jarken Esimbek Jianjun Zhou Toktarkhan Komesh Xindi Tang Dalei Li Yuxin He Kadirya Tursun Dongdong Zhou Ernar Imanaly Serikbek Sailanbek Xinjiang Astronomical Observatory Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Radio Astronomy Chinese Academy of Sciences Xinjiang Key Laboratory of Radio Astrophysics Energetic Cosmos Laboratory Nazarbayev University Institute of Experimental and Theoretical Physics Al-Farabi Kazakh National University

The excitation temperature Texfor molecular emission and absorption lines is an essential parameter for interpreting the molecular *** temperature can be obtained by observing multiple molecular transitions or hyperfine structures of a single transition,but it remains unknown for a single transition without hyperfine structure *** H2CO absorption experiments for a single transition without hyperfine structures adopted a constant value of Tex,which is not correct for molecular regions with active star formation and H II *** H2CO,two equations with two unknowns may be used to determine the excitation temperature Texand the optical depthτ,if other parameters can be determined from *** observational data of the4.83 GHz （λ=6 cm） H2CO (110-111) absorption line for three star formation regions,W40,M17 and DR17,have been used to verify this *** distributions of Texin these sources are in good agreement with the contours of the H110α emission of the H II regions in M17 and DR17 and with the H2CO (110-111) absorption in *** distributions of Texin the three sources indicate that there can be significant variation in the excitation temperature across star formation and H II regions and that the use of a fixed （low） value results in misinterpretation.

关键词： (ISM:) HII regions ISM: clouds ISM: molecules

GUEST EDITORIAL Intelligent Internet of Things with Reliable Communication and Collaboration Technologies

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China Communications 2024年第8期 4-8页

作者： Zhao Junhui Wu Celimuge Xu Wenjun Qi Chenhao bu Shengrong Zhang Shuowen Zhang qingmiao the School of Electronics and Information Engineering Beijing Jiaotong University the School of Information Engineering in East China Jiaotong University Meta-Networking Research Center the University of Electro-Communications the School of Artificial Intelligence BUPT State Key Laboratory of Networking and Switching Technology the Peng Cheng Laboratory the faculty of the School of Information Science and Engineering Southeast University Brock University the Hong Kong Polytechnic University East China Jiaotong University

The Internet of Things(IoT) connects objects to Internet through sensor devices, radio frequency identification devices and other information collection and processing devices to realize information interaction. IoT is widely used in many fields, including intelligent transportation, intelligent healthcare, intelligent home and industry.

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RPC应力-应变曲线系数与塑性损伤因子无量纲化计算模型研究

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工程力学 2024年第5期41卷 120-133页

作者：卜良桃刘港平湖南大学土木工程学院湖南长沙410082

为了方便活性粉末混凝土(Reactive Powder Concrete,RPC)等效矩形应力图系数与塑性损伤因子的计算与取值,对RPC应力-应变曲线系数与塑性损伤因子的计算模型进行了理论研究。通过对现有的计算方法进行无量纲化转化,推导了决定计算模型的... 详细信息

为了方便活性粉末混凝土(Reactive Powder Concrete,RPC)等效矩形应力图系数与塑性损伤因子的计算与取值,对RPC应力-应变曲线系数与塑性损伤因子的计算模型进行了理论研究。通过对现有的计算方法进行无量纲化转化,推导了决定计算模型的四个原函数条件;对一个实际的应力-应变关系进行了计算,将得到的结果进行了分析;并对受弯矩形梁非极限状态下截面内力和力矩的推定计算进行了演示。针对应力-应变关系式含有非整次有理分式的情况提出了曲线拟合方法;研究了拟合次数、拟合区间和拟合函数类型对拟合精度与稳定性的影响。比较了4种典型的RPC本构模型在同种材料下的应力-应变曲线系数与损伤因子取值模型曲线,结果显示:拟合曲线得到的取值模型与其他原始曲线得到的取值模型在曲线上具有较高的相似度,证明了曲线拟合方法的准确可靠性;最后给出了一种RPC受压应力-应变曲线系数与塑性损伤因子无量纲化取值模型。

关键词：活性粉末混凝土应力-应变曲线系数等效矩形应力图系数塑性损伤因子曲线拟合方法

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