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Stability analysis of complex terrain slope based on multi-source point cloud fusion

Journal of Mountain Science 2022年第9期19卷 2703-2714页

作者： ZAN wen-bo zhang wen-jie WANG Ning ZHAO Chun-chen YANG Qian LI Hao School of Highway Chang’an UniversityXi’an 710064China Research and Development Center for Loess Mechanics and Engineering Test Technology Shaanxi Polytechnic InstituteXianyang 712000China School of Automobile Chang’an UniversityXi’an 710064China

Numerical modelling is a common routine for slope stability analysis in the complex terrain,and the accuracy of topographic survey has a great impact on the results.In this study,a combination of unmanned aerial vehicle(UAV)photogrammetry and 3D laser scanning technique was first proposed to establish a high-precision digital elevation model(DEM),which could be accurate to 0.2 m,fulfilling the engineering requirements.Then,a series of 3D/2D finite element models(FEM)were constituted on the basis of DEM to investigate the slope stability in the complex terrain.The results indicate that the deformation of complex terrain slope is chiefly triggered by compression-shear failure and the failure zones are mostly distributed on the middle-upper part and the scarp.Furthermore,the complex terrain slope is divided into concave,convex,concave-convex and convex-concave slope according to the topographical curvature,and the factor of safety(FOS)is as follows:the maximum value 1.8504 for the concave-convex slope,the minimum value 1.1129 for the convexconcave slope,and the median for either concave or convex slope.The inflection points and curvature of the slope jointly determine the shape of nonlinear slope,dominating the morphological effect on the slope stability,so the rational use of section morphological effect will be conducive to the overall stability of the slope.For four representative slopes,the plastic deformation first emerges into the middle,then progressively develops to the upper,and finally forms the connected failure zones.

关键词： Slope stability Complex terrain DEM Numerical simulation Plastic zone Factor of Safety

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Apoptosis induced by short hairpin RNA-mediated STAT6 gene silencing in human colon cancer cells

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Chinese Medical Journal 2006年第10期119卷 801-808页

作者： zhang Ming-sheng ZHOU Yun-feng zhang wen-jie zhang Xiao-lian PAN Qin JI Xue-mei LUO Zhi-guo WU Jian-ping Department of Cancer Radio-Chemotherapy Zhongnan HospitalWuhan University Wuhan 430071 China Department of Surgery Pennsylvania State University College ofMedicine Hershey PA 17033 USA Department of Immunology Medical College of Wuhan UniversityWuhan 430071 China

Background The relationship between signal transduction and tumors has become one of the loci in cancer research. Signal transducer and activator of the transcription 6 （STAT6） signaling pathway is found to be activated in some cancer cells. But the function of the pathway in cancer cells is unknown. This study was undertaken to investigate the effect of the Stat6 signaling pathway on apoptosis in human colon cancer cells （HT-29 cells） and the possible mechanism of Stat6 by RNA interference techniques.

关键词： RNA interference short hairpin RNA signal transducer and activator of transcription 6 tumor apoptosis

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超声波检测技术在铸件检测中的研究应用

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铸造设备与工艺 2024年第1期 33-36,46页

作者：张文杰东风铸锻有限公司铸造二厂湖北十堰442013

工业无损检测方法很多,目前国内外最常用的检测方法:磁粉探伤检测法(MT)超声波检测法(UT)、射线检测法(RT)、渗透检测法(PT)和涡流检测法(ET).超声波检测以其检测成本低、探测深度大、检测设备体积小重量轻和检测速度快等忧点被广泛应... 详细信息

工业无损检测方法很多,目前国内外最常用的检测方法:磁粉探伤检测法(MT)超声波检测法(UT)、射线检测法(RT)、渗透检测法(PT)和涡流检测法(ET).超声波检测以其检测成本低、探测深度大、检测设备体积小重量轻和检测速度快等忧点被广泛应用于质量检测。本文主要介绍了超声检测技术在铸铁件气孔、缩孔、缩松等缺陷检测中的应用,对超声波检测技术在实际无损检测中的推广具有重要意义。

关键词：铸件超声波无损检测

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Effect of Artificial Electric Field Surface by Wave-Driven Triboelectricity on Anti-Bioadhesion for Riser Protection

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China Ocean Engineering 2024年第3期38卷 483-490页

作者： YI Peng QIU Hong-yuan LI Yong CAI Bao-ping Javad MOSTAGHIMI zhangwen-jie XIAO wen-sheng College of Mechanical and Electrical Engineering China University of PetroleumQingdao 266580China CNOOC EnerTech Equipment Technology Co. Ltd.Tianjin 300450China Department of Mechanical&Industrial Engineering University of TorontoToronto ONM5S3G8Canada

Biofouling has been a persistent problem in marine riser system, resulting in energy waste and equipment damage. Inthis study, a kind of water wave-driven contact-mode flexible triboelectric nanogeneration has been prepared byusing graphene-doped PDMS as dielectric friction material. When the graphene content is 2%, the average outputvoltage can reach 46 V under the contact frequency 10 Hz. The flexible triboelectric nanogeneration encapsulationmodule is impinged by water waves to generate alternating microelectric field on the riser surface and destroy theadhesion conditions of microorganisms during the biofilm stage. In the biofouling experiments at different stages, thebiofouling area of the platymonas subcordiformis has been reduced by 53%, 62% and 61%. It provides a new ideafor effective treatment of biofouling of mussels, oysters and barnacles attached to risers.

关键词： wave-drive triboelectric nanogeneration alternating microelectric field anti-biofouling

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中成药治疗室性早搏的临床研究证据图

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中国中药杂志 2024年第5期49卷 1397-1405页

作者：张文杰汤佳微李军武佶张印明解紫从张乐松孟超黄炫淳北京中医药大学北京100029 北京邮电大学北京100876 中国中医科学院广安门医院北京100053 兖矿新里程总医院山东邹城273500

该研究运用证据图系统梳理中成药治疗室性早搏的临床研究,了解该领域的证据分布。通过检索PubMed、Cochrane Library、Web of Science、中国知网(CNKI)、万方(Wanfang)、维普(VIP)数据库中关于中成药治疗室性早搏的文献,检索日期为2016... 详细信息

该研究运用证据图系统梳理中成药治疗室性早搏的临床研究,了解该领域的证据分布。通过检索PubMed、Cochrane Library、Web of Science、中国知网(CNKI)、万方(Wanfang)、维普(VIP)数据库中关于中成药治疗室性早搏的文献,检索日期为2016年1月至2022年12月。采用图表结合文字的方式对证据进行分析与展示。最终纳入文献164篇,包括干预性研究147篇、观察性研究4篇、系统评价13篇。结果共获得27种中成药,其中参松养心胶囊和稳心颗粒报告频次较高;临床用药存在超适应证使用现象;近年来国内外该领域发文量呈下降趋势;干预性研究的结局指标有8类,动态心电图、临床有效率、安全性、超声心动图报告频次较高,缺乏对β受体阻滞剂减停率、主要心血管事件和药物经济学指标的报告,评价维度单一;纳入文献整体质量较低,降低了研究结论的可信度。未来需更加规范临床用药,提高临床研究质量,开展临床综合评价,为中成药治疗室性早搏提供更健全的科学依据。

关键词：中成药室性早搏随机对照试验系统评价观察性研究证据图

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Interrelationships between leaf heat conductivity and tissue structures of different varieties of Populus tomentosa Carr

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Forestry Studies in China 2008年第3期10卷 173-178页

作者： WANG Min zhang wen-jie XIAO Jian zhang Zhi-yi LIU Jing College of Science Beijing Forestry University Beijing 100083 P. R. China Technical Institute of Physics and Chemistry Chinese Academic of Sciences ByiJing 100080 P. R. China Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education Beijing Forestry University Beijing 100083 P. R. China

Plant heat conductivity largely depends on tissue structure. Different structures lead to different heat conductivity. As well, water transfer also plays a very important role in heat transfer in plants. We have studied leaf heat conductivity and tissue structure of 3-and 30-year-old Populus tomentosa Carr. trees using infrared thermal imaging, steady state heat conductivity surveys and paraffin section and investigated the relationship between leaf heat conductivity, tissue structure and water content of leaves. The results show that the temperature on leaf surfaces among the various varieties of trees was almost the same. Leaf heat conductivity, temperature and water content of leaves are positively correlated. The thicker the leaf tissue structures, the larger the heat resistance. That is, the tighter the cells and the smaller the interspaces, the smaller the heat conductivity, which is not conducive for heat transfer.

关键词： Populus tomentosa Carr. leaf infrared thermal imaging heat conductivity paraffin section

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Model of leaf energy distribution and its experimental validation of Populus tomentosa Carr

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Forestry Studies in China 2008年第3期10卷 168-172页

作者： zhang wen-jie WANG Min SHEN Ying-bai zhang Zhi-yi College of Science Beijing Forestry University Beijing 100083 P. R. China Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education Beijing Forestry University Beijing 100083 P. R. China

Leaf temperature of a plant is the result of heat transfer between the plant and its environment. There are many factors that can affect leaf temperature, such as the solar radiation energy, environmental temperature, wind velocity, evaporation on the leaf surface, photosynthesis, respiration and so on, which have different effects on the temperature of leaves. In first instance, we analyzed the heat transfer on leaves of Populus tomentosa Carr. theoretically and constructed a model of energy distribution. We then validated the model by analyzing seven different kinds of one-year-old P. tomentosa leaves experimentally. The result shows that solar radiation is the main energy input and the dominant ways of thermal diffusion are heat transfer between the upper and lower leaf surfaces and evaporation from the leaf surface.

关键词： Populus tomentosa Carr. leaf heat transfer energy distribution

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太原市“十四五”规划大气污染防治政策的CO_(2)协同效益评估

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环境科学 2024年第3期45卷 1265-1273页

作者：肖婷玉束韫李慧王涵李俊宏严沁张文杰姜华中国环境科学研究院北京100012

为量化评估太原市“十四五”大气污染防治政策的减污降碳协同效益,使用京津冀温室气体-空气污染相互作用与协同模型(GAINS-JJJ),模拟评估13项大气污染防治措施的减排潜力,CO_(2)的协同减排效益.2025年政策情景下一次PM_(2.5)、PM_(10)、... 详细信息

为量化评估太原市“十四五”大气污染防治政策的减污降碳协同效益,使用京津冀温室气体-空气污染相互作用与协同模型(GAINS-JJJ),模拟评估13项大气污染防治措施的减排潜力,CO_(2)的协同减排效益.2025年政策情景下一次PM_(2.5)、PM_(10)、SO_(2)、NO_(x)、VOCs和NH3分别减排1.8(5%,相对于基准情景减排比例,下同)、2.5(2%)、3.7(16%)、20.0(27%)、13.6(15%)和0.0 kt(0%),CO_(2)减排9.0 Mt(13%),CH_(4)排放增加203.3 kt(相对于基准情景增加25%).SO_(2)、NO_(x)与VOCs减排主要发生在电力、工业燃烧与溶剂使用部门,CO_(2)减排主要发生在工业燃烧部门,CH_(4)排放量增加是由于煤矿开采活动水平升高.限制“双高”行业的能源消耗,严禁新增产能以及可再生能源发电比例提升措施的CO_(2)协同减排效益最高.VOCs具有优异协同减碳效益.建议太原市进一步推进终端电气化政策,同时需加大提升电力行业清洁能源比重和可再生能源发电的消纳能力.

关键词：减污降碳模型模拟协同效益 “十四五” 政策评估

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浅析云南乌铜走银传统手工艺在文创包装中的传承运用

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绿色包装 2024年第2期 117-121页

作者：张文杰黎英湖南工业大学湖南株洲412000

乌铜走银是云南特有的金属制作工艺,于2011年被国家收录到第三批国家级非物质文化遗产代表性项目名录当中。本文从乌铜走银传统手工技艺的源头出发,就其起源、文化背景、器型纹样及其工艺产生的基础条件等几方面分析,提出了纹样、工艺... 详细信息

乌铜走银是云南特有的金属制作工艺,于2011年被国家收录到第三批国家级非物质文化遗产代表性项目名录当中。本文从乌铜走银传统手工技艺的源头出发,就其起源、文化背景、器型纹样及其工艺产生的基础条件等几方面分析,提出了纹样、工艺在文创包装中的传承运用方式。

关键词：乌铜走银非物质文化遗产传统手工技艺包装设计

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Characteristic gene expression profiles in the progression from normal gastric epithelial cells to moderate gastric epithelial dysplasia and to gastric cancer

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Chinese Medical Journal 2012年第10期125卷 1777-1783页

作者： LI Mao-lan zhang Jing-cheng LI Song-gang WU wen-guang RAO Long-hua DONG Ping GU Jun LU Jian-hua zhang Lin DING Qi-chen WU Xiang-song MU Jia-sheng YANG Jia-hua zhang wen-jie CHEN Lei LIU Ying-bin Department of General Surgery Xinhua HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200092China Department of Genera1 Surgery First Hospital Affiliated to Shantou UniversityShantouGuangdong 515041China

Background Gastric cancer ranks high among the most common causes of cancer-related death worldwide. This study was designed to explore key genes involved in the progression of normal gastric epithelial cells to moderate gastric epithelial dysplasia （mGED） and to gastric cancer. Methods Twelve pairs of mGED tissues, gastric cancer tissues, and normal gastric tissues were collected by gastroscopy. Total RNA was then extracted and purified. After the addition of fluorescent tags, hybridization was carried out on a Gene chip microarray slide. Significance analysis of microarrays was performed to determine significant differences in gene expression between the different tissue types. Results Microarray data analysis revealed totally 34 genes that were expressed differently： 18 highly expressed （fold change 〉2; P 〈0.01） and 16 down-regulated （fold change 〉2; P 〈0.01）. Of the 34 genes, 24 belonged to several different functional categories such as structural molecule activity, extracellular regions, structural formation, cell death, biological adhesion, developmental processes, locomotion, and biological regulation that were associated with cancer. The remaining 10 genes were not involved in cancer research. Of these genes, the expression levels of Matrix metalloproteinase-12 （MMP12）, Caspase-associated recruitment domain 14 （CARD14）, and Chitinase 3-like 1 （CHI3L1） were confirmed by semi-quantitative RT-PCR. A two-way clustering algorithm divided the 36 samples into three categories and the overall correct classification efficiency was 80.6% （29/36）. Almost all of these genes （31/34） showed constant changes in the process of normal gastric epithelial cells to mGED to gastric cancer. Conclusions The results of this study provided global gene expression profiles during the development and progression from normal gastric epithelial cells to mGED to gastric cancer. These data may provide new insights into the molecular pathology of gastric cancer which may be useful for the detection, diagnosis, and treatment.

关键词： gastric cancer dysplasia gene chips technology

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