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基于ArcGIS的三维地质模型自动构建方法

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世界有色金属 2024年第7期 25-27页

作者：李鸿卫闫文超西南有色昆明勘测设计(院)股份有限公司云南昆明650000

为提高三维地质模型精度,引进ArcGIS技术,设计一种针对三维地质模型的自动化构建方法。以ArcGIS为基础,利用ArcGIS Engine系统,结合C#开发环境,提取三维地质空间点;利用ArcGIS中的对象模型,构建非直接GIS数据模型;为了更加贴近真实的三... 详细信息

为提高三维地质模型精度,引进ArcGIS技术,设计一种针对三维地质模型的自动化构建方法。以ArcGIS为基础,利用ArcGIS Engine系统,结合C#开发环境,提取三维地质空间点;利用ArcGIS中的对象模型,构建非直接GIS数据模型;为了更加贴近真实的三维模型,利用ArcGIS类库中的IGeometryMaterial,设计属性数据聚合与地质结构纹理映射;考虑属性数据在空间上的分布变化,设计地质数据插值处理;引进变差函数,计算处理后数据的偏差值,将数据录入ArcGIS平台,自动生成三维地层模型。对比实验结果证明:该方法可以提高三维地质模型的精度,使三维地质模型剖面随机点与地质实景的匹配度处于一个较高水平。

关键词： ArcGIS 属性数据纹理映射构建方法自动三维地质模型

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过氧化氢预处理-硝酸银滴定法测定氯离子的研究

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中国土壤与肥料 2024年第7期 241-248页

作者：李婧怡王玮棋杨柳青甄卓郝建朝周炜刘惠芬天津农学院天津300384

氯离子(Cl^(-))测定在研究氯营养和盐胁迫过程中起着关键作用,但是样品的预处理仍然是检测Cl^(-)的一个难题,针对植物、土壤、肥料、水体并没有统一的样品预处理方法。基于硝酸银(AgNO_(3))滴定法测定Cl^(-)的机理,研究过氧化氢(H_(2)O_... 详细信息

氯离子(Cl^(-))测定在研究氯营养和盐胁迫过程中起着关键作用,但是样品的预处理仍然是检测Cl^(-)的一个难题,针对植物、土壤、肥料、水体并没有统一的样品预处理方法。基于硝酸银(AgNO_(3))滴定法测定Cl^(-)的机理,研究过氧化氢(H_(2)O_(2))预处理样品测定Cl^(-)的原理和方法。结果表明,H_(2)O_(2)在非浓盐酸环境下不能氧化Cl^(-)而生成氯气(Cl_(2));H_(2)O_(2)电离出的氢离子(H^(+))会与Cl^(-)结合生成氯化氢(HCl),在加热条件下挥发导致Cl^(-)损失;H_(2)O_(2)和试样在加热回流冷凝条件下可对样品进行脱色和有机物降解,既不会造成Cl^(-)损失,又利于后续滴定终点判断;H_(2)O_(2)预处理方法适用于植物、土壤和浑浊水样中Cl^(-)的测定;该方法具有操作简单、无二次污染、测定结果准确度和精密度高等优点。为建立不同基质样品中Cl^(-)检测的统一标准测试方法奠定了理论和实践基础。

关键词：过氧化氢氯离子预处理检测

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不同地质雷达设备在铁路工程隐伏岩溶探测中的应用与对比

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高速铁路技术 2024年第4期15卷 82-86页

作者：刘伟周超金俊俊西南交通大学成都610031 中铁二院工程集团有限责任公司成都610031

隐伏岩溶因其隐蔽性强和发育无规律性等特点,给岩溶地区的铁路建设和运营带来极大的安全隐患,寻求高效精准的探测方法是隐伏岩溶勘察的重难点。利用岩溶与其周围岩体之间的物性差异,物探方法对隐伏岩溶有较好的探测效果。地质雷达法因... 详细信息

隐伏岩溶因其隐蔽性强和发育无规律性等特点,给岩溶地区的铁路建设和运营带来极大的安全隐患,寻求高效精准的探测方法是隐伏岩溶勘察的重难点。利用岩溶与其周围岩体之间的物性差异,物探方法对隐伏岩溶有较好的探测效果。地质雷达法因其高效、无损、低成本等优点,近年来被广泛应用于铁路、公路和城市等地下隐伏岩溶的探测工作。本文以在建贵南高速铁路为背景,应用两种地质雷达设备对某岩质边坡隐伏岩溶进行探测,详细对比了两种不同地质雷达仪器的探测成果,并将探测成果进行了开挖验证。结果表明:两种地质雷达设备在隐伏岩溶地质体勘察中均能得到较好的探测效果。研究成果可为类似隐伏岩溶探测工作的设备选择提供参考。

关键词：地质雷达岩质边坡隐伏岩溶铁路工程

Numerical simulation of stirred tanks using a hybrid immersed-boundary method

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1122-1134页

作者： Shengbin Di ji Xu Qi Chang wei Ge State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

Conventionally, multiple reference frame(MRF) method and sliding mesh(SM) method are used in the simulation of stirred tanks, however, both methods have limitations. In this study, a hybrid immersed-boundary(IB)technique is developed in a finite difference context for the numerical simulation of stirred tanks. IBs based on Lagrangian markers and solid volume fractions are used for moving and stationary boundaries, respectively, to achieve optimal efficiency and accuracy. To cope with the high computational cost in the simulation of stirred tanks, the technique is implemented on computers with hybrid architecture where central processing units(CPUs) and graphics processing units(GPUs) are used together. The accuracy and efficiency of the present technique are first demonstrated in a relatively simple case, and then the technique is applied to the simulation of turbulent flow in a Rushton stirred tank with large eddy simulation(LES). Finally the proposed methodology is coupled with discrete element method(DEM) to accomplish particle-resolved simulation of solid suspensions in small stirred tanks. It demonstrates that the proposed methodology is a promising tool in simulating turbulent flow in stirred tanks with complex geometries.

关键词： Immersed-boundary method CPU–GPU hybrid computing Stirred tank Large eddy simulation

Running-in Test and Fractal Methodology for Worn Surface Topography Characterization

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Chinese Journal of Mechanical Engineering 2010年第5期23卷 600-605页

作者： ji Cuicui ZHU Hua jiANG wei LU Binbin School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou 221116 China School of Mechanical Engineering University of Leeds Leeds LS2 9JZ UK

Studying and understanding of the surface topography variation are the basis for analyzing tribological problems,and characterization of worn surface is *** geometry offers a more accurate description for surface roughness that topographic surfaces are statistically self-similar and can be quantitatively evaluated by fractal *** change regularity of worn surface topography is one of the most important aspects of running-in ***,the existing research normally adopts only one friction matching pair to explore the surface topography change,which interrupts the running-in wear process and makes the experimental result lack authenticity and *** this paper,to investigate the change regularity of surface topography during the real running-in process,a series of running-in tests by changing friction pairs under the same operating conditions are conducted on UMT-II Universal Multifunction *** surface profile data are acquired by MiaoXAM2.5X-50X Ultrahigh Precision Surface 3D Profiler and analyzed using fractal dimension D,scale coefficient C and characteristic roughness Ra ＊based on root mean square（RMS） *** characterization effects of the three parameters are discussed and *** results obtained show that there exists remarkable fractal feature of surface topography during running-in process,both D and Ra ＊increase gradually,while C decreases slowly as the wear-in process goes on,and all parameters tend to be stable when the wear process steps into the normal wear *** ＊illustrates higher sensitivity for rough surface characterization compared with the other two *** addition,the running-in test carried with a set of identical surface properties is more scientific and reasonable than the traditional *** proposed research further indicates that the fractal method can quantitatively measure the rough surface,which also provides an evidence for running-in process identification and tribology d

关键词： running-in worn surface topography RMS method fractal dimension scale coefficient characteristic roughness

Design Method for Optimizing the Interactive Interface of Live Broadcasting Platform for the Elderly Users

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印刷与数字媒体技术研究 2024年第4期 167-178页

作者： wei Bi-ze FAN wei DUAN Ying-ke College of Architecture and Art Taiyuan University of TechnologyJinzhong 030606China

In the era of network live broadcasting for everyone,the development of live broadcasting platforms is also more intelligent and ***,in the face of a large group of elderly users,the interface interaction design mode used is still mainly based on the interaction mode for young groups,and is not designed for elderly ***,a design method for optimizing the interaction interface of live broadcasting platform for elderly users was proposed in this ***,the case study method and Delphi expert survey method were used to determine the design needs of elderly users and the design mode was ***,the orthogonal design principle was used to design a test sample of the interactive interface of live broadcasting platform applicable for the elderly users,and then a user evaluation system was established to calculate the weights of the design elements using hierarchical analysis,and then the predictive relationship between the design mode of the interactive interface of live broadcasting platform and the elderly users was established by Quantitative Theory ***,Genetic Algorithm was applied to generate the optimized design *** results showed that the design method based on the Genetic Algorithm and the combination of Quantitative Theory can scientifically and effectively optimize the design of the interactive interface of the live broadcasting platform for the elderly users,and improve the experience of the elderly users.

关键词： Live broadcasting platform Interaction design Elderly users Genetic Algorithm Quantitative Theory I

新时期地方高职院校学生管理工作有效开展机制构建研究

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湖北开放职业学院学报 2024年第15期37卷 88-90页

作者：陈超群杨伟庆广州华南商贸职业学院广东广州1510000

学生管理作为高校内部管理的关键环节,是服务于学生成才成长的重要管理手段。当前,高职院校学生管理工作不能与时俱进,管理机制和管理办法难以实现制度化与人性化的融合,无法发挥其管理的作用。对此,搭建学生管理工作有效开展的创新机制... 详细信息

学生管理作为高校内部管理的关键环节,是服务于学生成才成长的重要管理手段。当前,高职院校学生管理工作不能与时俱进,管理机制和管理办法难以实现制度化与人性化的融合,无法发挥其管理的作用。对此,搭建学生管理工作有效开展的创新机制,通过营造民主的管理氛围,强化学生管理的实施效果,从而推动学生管理制度人性化改革,以期收获更高质量的学生管理成效。

关键词：新时期学生管理管理机制

Strain- and twist-engineered optical absorption of few-layer black phosphorus

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Science China(Physics,Mechanics & Astronomy) 2016年第9期59卷 86-92页

作者： Qian jia XiangHua Kong jingSi Qiao wei ji Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Renmin University of China Beijing 100872 China

Density functional and many-body perturbation theories calculations were carried out to investigate fundamental and optical bandgap, exciton binding energy and optical absorption property of normal and strain- and twist-engineered few-layer black phosphorus （BP）. We found that the fundamental bandgaps of few layer BP can be engineered by layer stacking and in-plane strain, with linear relationships to their associated exciton binding energies. The strain-dependent optical absorption behaviors are also anisotropic that the position of the first absorption peak monotonically blue-shifts as the strain applies to either direction for incident light polarized along the armchair direction, but this is not the case for that along the zigzag direction. Given those striking properties, we proposed two prototype devices for building potentially more balanced light absorbers and light filter passes, which promotes further applications and investigations of BP in nanoelectronics and optoelectronics.

关键词： black phosphorus light absorption strain-engineering exciton binding energy

HIV encephalopathy is contributed by macrophages and microglia

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Science China(Life Sciences) 2024年第4期67卷 836-838页

作者： Si-Meng Liu Man Li Chunhui Ma Chunying Liu An Lv Qing Li Yamei Niu Peng Wang Bo Huang wei-Min Tong Department of Pathology China Medical UniversityShenyang 110122China Department of Pathology Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeNeuroscience CenterChinese Academy of Medical SciencesBeijing 100005China Department of Pathology Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Molecular Pathology Research Center Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Center For Experimental Animal Research Institute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China Department of Immunology and National Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100010China Department of Biochemistry and Molecular Biology Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Dear Editor,Acquired immunodeficiency syndrome(AIDS),characterized by a significant decrease in the number of CD4^(+)T cells,causes a defective T cell immune response,which subsequently leads to various conditional pathogenic infections and tumors(Calmy et al.,2018;Seligmann et al.,1987).Neurological disorders have been reported in 70%–80%of patients with AIDS(Saylor et al.,2016)。

关键词： encephalopathy immunodeficiency