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西藏库拉岗日穹窿次麦矽卡岩型锡铁铅锌多金属矿床的发现及其意义

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大地构造与成矿学 2024年第4期48卷 724-736页

作者：付建刚李光明郭伟康张海董随亮张林奎李应栩马国桃焦彦杰中国地质调查局成都地质调查中心(西南地质科技创新中心)矿产地质室四川成都610218

库拉岗日穹窿位于西藏北喜马拉雅片麻岩穹窿带东段,毗邻北部的拉隆穹窿。通过1∶5万矿产地质填图和稀疏地表工程控制,在库拉岗日穹窿东部发现了一具有大型矿床潜力的次麦锡铁铅锌多金属矿床,其中Sn-Fe和Pb-Zn-Ag矿体主要赋存于矽卡岩中... 详细信息

库拉岗日穹窿位于西藏北喜马拉雅片麻岩穹窿带东段,毗邻北部的拉隆穹窿。通过1∶5万矿产地质填图和稀疏地表工程控制,在库拉岗日穹窿东部发现了一具有大型矿床潜力的次麦锡铁铅锌多金属矿床,其中Sn-Fe和Pb-Zn-Ag矿体主要赋存于矽卡岩中,属于矽卡岩型矿床。该矿床的矿体品位高,厚度大,主要金属矿物有锡石、磁铁矿、方铅矿、闪锌矿、黄铁矿、白钨矿和镜铁矿等;非金属矿物有石英、方解石、云母、绿帘石、绿泥石、透闪石、阳起石和符山石等。目前,稀疏的地表工程已控制2条Sn-Fe矿体和5条Pb-Zn-Ag矿体,且矿区内钨也显示出良好的成矿前景。综合评估表明,次麦矽卡岩型锡铁铅锌多金属矿床的资源潜力巨大,其矿化特点与成矿元素组合独特,以锡石和磁铁矿共生为特点,明显不同于北喜马拉雅成矿带其他矿床,是一种新的矿床类型。该矿床的发现对认识和理解北喜马拉雅成矿带稀有金属成矿作用与穹窿构造淡色花岗岩成矿系统有重要意义。

关键词：锡铁铅锌矿矽卡岩型库拉岗日穹窿找矿意义北喜马拉雅成矿带青藏高原

Smoothness preserving layout for dynamic labels by hybrid optimization

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Computational Visual Media 2022年第1期8卷 149-163页

作者： Yu He Guo-Dong Zhao Song-hai zhang Department of Computer Science and Technology Tsinghua UniversityBeijingChina Department of Computer Science and Technology Tianjin University of TechnologyTianjinChina

Stable label movement and smooth label trajectory are critical for effective information *** label changes cannot be avoided by whatever forced directed methods due to the unreliability of resultant force or global optimization methods due to the complex trade-off on the different *** solve this problem,we proposed a hybrid optimization method by taking advantages of the merits of both *** first detect the spatial-temporal intersection regions from whole trajectories of the features,and initialize the layout by optimization in decreasing order by the number of the involved *** label movements between the spatial-temporal intersection regions are determined by force directed *** cope with some features with high speed relative to neighbors,we introduced a force from future,called temporal force,so that the labels of related features can elude ahead of time and retain smooth *** also proposed a strategy by optimizing the label layout to predict the trajectories of features so that such global optimization method can be applied to streaming data.

关键词： label layout smoothness preserving dynamic label forced based static optimization hybrid optimization

基于品牌基因理论的健康促进医院建设路径分析

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中国健康教育 2024年第2期40卷 187-191页

作者：王波龙练璐张海波赵俊南京医科大学第一附属医院党政办江苏南京210029 南京医科大学第一附属医院组织人事处江苏南京210029

本文以品牌基因理论为框架,分析了健康促进医院的品牌基因结构与作用,探讨了其特征和建设路径。健康促进医院品牌基因由服务品牌基因、文化品牌基因、环境品牌基因和管理机制品牌基因组成,并通过健康教育、健康文化、激励机制、健康服... 详细信息

本文以品牌基因理论为框架,分析了健康促进医院的品牌基因结构与作用,探讨了其特征和建设路径。健康促进医院品牌基因由服务品牌基因、文化品牌基因、环境品牌基因和管理机制品牌基因组成,并通过健康教育、健康文化、激励机制、健康服务、健康环境和组织管理等要素构建品牌形象。健康促进医院建设具有以人民健康为中心的核心特征,医院性质、规模、区位等决定其个性特征。基于品牌基因理论从明确品牌定位和核心价值、打造品牌特征、创新品牌服务模式和优化品牌传播体验4个方面提出建设路径,旨在为健康促进医院的建设提供理论参考,推动公立医院高质量发展,助力健康中国建设。

关键词：品牌基因健康促进医院建设路径

液相色谱-串联质谱法分析洋葱中甲苯磺丁脲含量

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粮食与油脂 2024年第1期37卷 151-155页

作者：任兴权刘盼张海霞赵俊酒泉市食品检验检测中心甘肃酒泉735000 兰州大学化学化工学院甘肃兰州730000

通过液相色谱-串联质谱(LC-MS/MS)法建立一种检测洋葱中甲苯磺丁脲含量的方法,并对不同地区洋葱中甲苯磺丁脲含量进行分析。结果表明:建立的方法提取溶剂为乙腈、色谱柱为Waters ACQUITY UPLCBEH Phenyl(50 mm×2.1 mm, 1.7μm)、流动相... 详细信息

通过液相色谱-串联质谱(LC-MS/MS)法建立一种检测洋葱中甲苯磺丁脲含量的方法,并对不同地区洋葱中甲苯磺丁脲含量进行分析。结果表明:建立的方法提取溶剂为乙腈、色谱柱为Waters ACQUITY UPLCBEH Phenyl(50 mm×2.1 mm, 1.7μm)、流动相为10 mmol/L甲酸铵-乙腈溶液、流动相流速为0.3 mL/min、等度淋洗方式。当甲苯磺丁脲在2.0~100.0 ng/mL范围内时线性关系良好,回收率为98.9%~103.1%、相对标准偏差为0.44%~1.52%、检出限为0.5μg/kg、定量限为2.0μg/kg。对全国8个主产区的洋葱进行分析发现,甘肃酒泉洋葱的甲苯磺丁脲含量最高。

关键词：洋葱甲苯磺丁脲液相色谱-串联质谱

Cross-domain identity authentication scheme based on blockchain and PKI system

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高置信计算(英文) 2023年第1期3卷 8-17页

作者： hai zhang Feng Zhao School of Information and Communication Guilin University of Electronic TechnologyGuilin 541004China School of Artificial Intelligence and Information Engineering Guangxi Electrical Polytechnic InstituteNanning 530299China

In vehicular ad hoc networks(VANET),the cross-domain identity authentication of users is very important for the development of VANET due to the large cross-domain mobility of vehicle *** Public Key Infrastructure(PKI)system is often used to solve the identity authentication and security trust problems faced by ***,the PKI system has challenges such as too centralized Authority of Certification Authority(CA),frequent cross-domain access to certificate interactions and high authentication volume,leading to high certificate management costs,complex cross-domain authentication paths,easy privacy leakage,and overburdened *** address these problems,this paper proposes a lightweight blockchain-based PKI identity management and authentication architecture that uses smart contracts to reduce the heavy burden caused by CAs directly managing the life cycle of digital *** this basis,a trust chain based on smart contracts is designed to replace the traditional CA trust chain to meet the general cross-domain requirements,to effectively avoid the communication pressure caused by a mass of certificate *** the cross-domain scenario with higher privacy and security requirements the identity attribute authentication service is provided directly while protecting privacy by using the Merkle tree to anchor identity attribute data on and off the blockchain ***,the proposed scheme was comprehensively analyzed in terms of cost,time consumption and security.

关键词： Vehicular ad hoc network PKI Blockchain Cross-domain authentication

A Survey of 3D Indoor Scene Synthesis

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Journal of Computer Science & Technology 2019年第3期34卷 594-608页

作者： Song-hai zhang Shao-Kui zhang Yuan Liang Peter Hall Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology(BNRist) Beijing 100084China Department of Computer Science University of BathClaverton DownBathBA2 7AYU.K.

Indoor scene synthesis has become a popular topic in recent *** functional and plausible indoor scenes is an inherently difficult task since it requires considerable knowledge to both choose reasonable object categories and arrange objects *** this survey,we propose four criteria which group a wide range of 3D(three-dimensional)indoor scene synthesis techniques according to various aspects(specifically,four groups of categories).It also provides hints,througli comprehensively comparing all the techniques to demonstrate their effectiveness and drawbacks,and discussions of potential remaining problems.

关键词： content generation indoor scene synthesis layout arrangement probabilistic model

QQqq Four-Quark Bound States in Chiral SU(3) Quark Model

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Communications in Theoretical Physics 2008年第8期50卷 437-440页

作者： zhang Ming zhang hai-Xia zhang Zong-Ye Institute of High Energy Physics the Chinese Academy of Sciences P.O. Box 918-4 Beijing 100049 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China School of Biomedical Engineering Capital Medical University Beijing 100069 China

Abstract The possibility of QQqq heavy-light four-quark bound states has been analyzed by means of the chiral SU（3） quark model, where Q is the heavy quark （c or b） and q is the light quark （u, d, or s）. We obtain a bound state for the bbnn configuration with quantum number JR=1^＋, I = 0 and for the ccnn （JR=1^＋, I=O） configuration, which is not bound but slightly above the D^＊ D^＊ threshold （n is u or d quark）. Meanwhile, we also conclude that a weakly bound state in bbnn system can also be found without considering the ehiral quark interactions between the two light quarks, yet its binding energy is weaker than that with the chiral quark interactions.

关键词： four-quark states quark model chiral symmetry

A new dataset of dog breed images and a benchmark for fine-grained classification

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Computational Visual Media 2020年第4期6卷 477-487页

作者： Ding-Nan Zou Song-hai zhang Tai-Jiang Mu Min zhang Department of Computer Science and Technology BNRistTsinghua UniversityBeijing 100084China NaJiu Company Hunan 410022China Harvard Medical School Brigham and Women’s HospitalBostonMA 02115USA

In this paper, we introduce an image dataset for fine-grained classification of dog breeds: the Tsinghua Dogs Dataset. It is currently the largest dataset for fine-grained classification of dogs, including 130 dog breeds and 70,428 real-world images. It has only one dog in each image and provides annotated bounding boxes for the whole body and head. In comparison to previous similar datasets, it contains more breeds and more carefully chosen images for each breed. The diversity within each breed is greater,with between 200 and 7000+ images for each *** of the whole body and head makes the dataset not only suitable for the improvement of finegrained image classification models based on overall features, but also for those locating local informative parts. We show that dataset provides a tough challenge by benchmarking several state-of-the-art deep neural models. The dataset is available for academic purposes at https://***/ThuDogs/.

关键词： fine-grained classification dog dataset benchmark

Exact Two-Soliton Solutions for Discrete mKdV Equation

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Communications in Theoretical Physics 2008年第6期49卷 1553-1556页

作者： YANG Qin zhang hai-Jun School of Electrical and Mechanical Engineering Jiaxing University Jiaxing 314001 China College of Electrical Engineering Zhejiang University Hangzhou 310027 China

An exact two-soliton solution of discrete mKdv equation is derived by using the Hirota direct approach. In addition, we plot the soliton solutions to discuss the properties of solitons. It is worth while noting that w... 详细信息

关键词： discrete equation Hirota direct method soliton