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一种新的标准模型下的门限签名方案

计算机工程与应用 2010年第16期46卷 105-107,110页

作者：达青峰青海师范大学计算机系西宁810008

针对徐静提出的门限签名方案,构造了一种合谋攻击.通过在部分签名中添加签名成员私有密钥的方法,基于Waters签名方案和Gennaro的分布式密钥生成协议,设计了一种新的无可信中心的门限签名方案。该方案能有效抵抗合谋攻击和伪造签名攻击.... 详细信息

针对徐静提出的门限签名方案,构造了一种合谋攻击.通过在部分签名中添加签名成员私有密钥的方法,基于Waters签名方案和Gennaro的分布式密钥生成协议,设计了一种新的无可信中心的门限签名方案。该方案能有效抵抗合谋攻击和伪造签名攻击.最后,对新方案进行了安全性和有效性分析。

关键词：门限签名无可信中心合谋攻击标准模型

Two stages power generation test of the hot dry rock exploration and production demonstration project in the Gonghe Basin,northeastern qinghai-Tibet plateau,China

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China Geology 2024年第3期7卷 409-421页

作者： Er-yong Zhang Dong-guang Wen Gui-ling Wang Xian-peng Jin Lin-you Zhang Hai-dong Wu Wen-shi Wang Cheng-ming Ye Wei Weng Kuan Li Jin-sheng Wu Xian-chun Tang Chong-yuan Zhang qing-da feng Sheng Lian Li-sha Hu Gui-lin Zhu Xing-long Xie Bin Wu dan Wang Xue Niu Zhao-xuan Niu Dong-lin Liu Hui Zhang Wen-hao Xu Shu-qing Yao Li Yang Center for Hydrogeology and Environmental Geology Survey China Geological SurveyMinistry of Natural ResourcesTianjin 300304China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesChina Geological SurveyShijiazhuang 050061China Institute of Exploration Techniques Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Institute of Exploration Engineering China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Institute of Exploration Technology Chinese Academy of Geological SciencesChengdu 611734China Chinese Academy of Geological Sciences China Geological SurveyBeijing 100037China Institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyBeijing 100081China Geoscience Documentation Center China Geological SurveyMinistry of Natural ResourcesBeijing 100083China

The Hot Dry Rock(HDR)is considered as a clean and renewable energy,poised to significantly contribute to the global energy decarbonization *** HDR projects worldwide have accumulated valuable experience in efficient drilling and completion,reservoir construction,and fracture *** 2019,China Geological Survey(CGS)initiated a demonstration project of HDR exploration and production in the Gonghe Basin,aiming to overcome the setbacks faced by HDR *** the ensuing four years,the Gonghe HDR project achieved the first power generation in 2021,followed by the second power generation test in *** establishing the primary well group in the initial phase,two directional wells and one branch well were *** progress was made in successfully constructing the targeted reservoir,realizing inter-well connectivity,power generation and grid connection,implementing of the real-time micro-seismic monitoring.A closed-loop technical validation of the HDR exploration and production was ***,many technical challenges remain in the process of HDR industrialization,such as reservoir fracture network characterization,efficient drilling and completion,multiple fracturing treatment,continuous injection and production,as well as mitigation of induced seismicity and numerical simulation technology.

关键词： Power generation Hot dry rock(HDR) Enhanced geothermal system(EGS) Genesis mechanism Gonghe Basin Directional drilling Reservoir construction Circulation test Induced seismicity Clean energy exploration engineering

开炼机混炼程序对丙烯腈-丁二烯硫化胶性能的影响

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合成材料老化与应用 2017年第5期46卷 65-67,79页

作者：贾慧青翟月勤笪敏峰中国石油兰州化工研究中心甘肃兰州730060

丙烯腈-丁二烯硫化胶评价方法落后于国内NBR技术发展的需求,该文评价了NBR物理和化学试验方法,研究了NBR硫化特性影响因素,确定了评价丁腈橡胶采用的配合剂,并通过试验确定了适用国内评价NBR的开炼机混炼标准程序。

关键词：丙烯腈-丁二烯橡胶开炼机混炼硫化特性

The first power generation test of hot dry rock resources exploration and production demonstration project in the Gonghe Basin,qinghai Province,China

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China Geology 2022年第3期5卷 372-382页

作者： Er-yong Zhang Dong-guang Wen Gui-ling Wang Wei-de Yan Wen-shi Wang Cheng-ming Ye Xu-feng Li Huang Wang Xian-chun Tang Wei Weng Kuan Li Chong-yuan Zhang Ming-xing Liang Hong-bao Luo Han-yue Hu Wei Zhang Sen-qi Zhang Xian-peng Jin Hai-dong Wu Lin-you Zhang qing-da feng Jing-yu Xie dan Wang Yun-chao He Yue-wei Wang Zu-bin Chen Zheng-pu Cheng Wei-feng Luo Yi Yang Hao Zhang En-lai Zha Yu-lie Gong Yu Zheng Chang-sheng Jiang Sheng-sheng Zhang Xue Niu Hui Zhang Li-sha Hu Gui-lin Zhu Wen-hao Xu Zhao-xuan Niu Li Yang Center for Hydrogeology and Environmental Geology Survey China Geological SurveyMinistry of Natural ResourcesBaoding 071051China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesChina Geological SurveyShijiazhuang 050061China Department of Natural Resources of qinghai Province Xining 810001China Institute of Exploration Techniques Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Department of Hydrogeology and Environmental Geology China Geological SurveyMinistry of Natural ResourcesBeijing 100037China Chinese Academy of Geological Sciences China Geological SurveyBeijing 100037China Beijing Institute of Exploration Engineering China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyBeijing 100081China Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Institute of Exploration Technology Chinese Academy of Geological SciencesChina Geological SurveyChengdu 611734China Geoscience Documentation Center China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Jilin University Changchun 130012China Oil and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Institute of the Hydrogeology and Engineering Geology of qinghai Xining 810008China

Hot dry rock(HDR)is a kind of clean energy with significant *** the 1970s,the United States,Japan,France,Australia,and other countries have attempted to conduct several HDR development research projects to extract thermal energy by breaking through key ***,up to now,the development of HDR is still in the research,development,and demonstration *** HDR exploration borehole(with 236℃ at a depth of 3705 m)was drilled into Triassic granite in the Gonghe Basin in northwest China in ***,China Geological Survey(CGS)launched the HDR resources exploration and production demonstration project in *** three years of efforts,a sequence of significant technological breakthroughs have been made,including the genetic model of deep heat sources,directional drilling and well completion in high-temperature hard rock,large-scale reservoir stimulation,reservoir characterization,and productivity evaluation,reservoir connectivity and flow circulation,efficient thermoelectric conversion,monitoring,and geological risk assessment,*** the whole-process technological system for HDR exploration and production has been preliminarily established *** first power generation test was completed in November *** results of this project will provide scientific support for HDR development and utilization in the future.

关键词： Hot dry rock Directional drilling Reservoir stimulation Microseismic monitoring Organic Rankine cycle(ORC) Power generation test Energy geological survey engineering Gonghe Basin qinghai Province China

Visual Basic CAI软件的研制

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淮阴工学院学报 2002年第3期11卷 20-21页

作者：姚清海沈达峰淮阴工学院计算机工程系江苏淮安223001

本文介绍了应用Visual Basic进行CAI软件开发的基本方法及其关键实现技术。

关键词： VB CAI软件

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慢性病防治可持续发展筹资模式的探讨

中国卫生经济 2007年第6期26卷 45-47页

作者：刘庆敏项海青金达丰李莉裘欣浙江省杭州市疾病预防控制中心杭州310006

目的:探索慢性病防治筹资的可持续发展模式。方法:通过文献归纳、实证收集、专访调查、小组座谈、问卷调查等方法收集有关研究信息,调查对象为行政管理人员、慢性病防治专业机构负责人和具体工作人员共216人。结果:慢性病防治筹资应以... 详细信息

目的:探索慢性病防治筹资的可持续发展模式。方法:通过文献归纳、实证收集、专访调查、小组座谈、问卷调查等方法收集有关研究信息,调查对象为行政管理人员、慢性病防治专业机构负责人和具体工作人员共216人。结果:慢性病防治筹资应以政府财政投入为主,社会和医疗保险参与和补充,企业和其他非政府组织协助。同时,坚持实施以人为本和以病为本相结合,地区统筹和城乡结合,医疗和预防平衡发展。结论:我国现阶段应采取以政府投入为主多方参与合作为辅的慢性病防治筹资模式。

关键词：慢性病防治筹资模式

Effects of cadium, zinc and lead on soil enzyme activities

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Journal of Environmental Sciences 2006年第6期18卷 1135-1141页

作者： YANG Zhi-xin LIU Shu-qing ZHENG da-wei feng Sheng-dong College of Resource and Environment China Agricultural University Beijing 100094 China College of Resource and Environment Agricultural University of Hebei Baoding 071001 China

Heavy metal （HM） is a major hazard to the soil-plant system. This study investigated the combined effects of cadium （Cd）, zinc （Zn） and lead （Pb） on activities of four enzymes in soil, including calatase, urease, invertase and alkalin phosphatase. HM content in tops of canola and four enzymes activities in soil were analyzed at two months after the metal additions to the soil. Pb was not significantly inhibitory than the other heavy metals for the four enzyme activities and was shown to have a protective role on calatase activity in the combined presence of Cd, Zn and Pb; whereas Cd significantly inhibited the four enzyme activities, and Zn only inhibited urease and calatase activities. The inhibiting effect of Cd and Zn on urease and calatase activities can be intensified significantly by the additions of Zn and Cd. There was a negative synergistic inhibitory effect of Cd and Zn on the two enzymes in the presence of Cd, Zn and Pb. The urease activity was inhibited more by the HM combinations than by the metals alone and reduced approximately 20%--40% of urease activity. The intertase and alkaline phosphatase activities significantly decreased only with the increase of Cd concentration in the soil. It was shown that urease was much more sensitive to HM than the other enzymes. There was a obvious negative correlation between the ionic impulsion of HM in soil, the ionic impulsion of HM in canola plants tops and urease activity. It is concluded that the soil urease activity may be a sensitive tool for assessing additive toxic combination effect on soil biochemical parameters.

关键词： multiple heavy metal pollution canola plants soil enzyme ionic impulsion

The first record of freshwater plesiosaurian from the Middle Jurassic of Gansu, NW China, with its implications to the local palaeobiogeography

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Journal of Palaeogeography 2019年第4期8卷 360-367页

作者： Ting Gao da-qing Li Long-feng Li Jing-Tao Yang Institute of Vertebrate Paleontology and College of Life Science and Technology Gansu Agricultural University

Plesiosaurs are one of the common groups of aquatic reptiles in the Mesozoic,which mainly lived in marine *** plesiosaurs are rare in the world,especially from the *** present paper reports the first freshwater plesiosaur,represented by four isolated teeth from the Middle Jurassic fluviolacustrine strata of qingtujing area,Jinchang City,Gansu Province,Northwest *** teeth are considered to come from one *** comparative analysis of the corresponding relationship between the body and tooth sizes of the known freshwater plesiosaur shows that Jinchang teeth represent a small-sized *** on the adaptive radiation of plesiosaurs and the palaeobiogeographical context,we propose a scenario of a river leading to the Meso-Tethys in the Late Middle Jurassic in Jinchang area,which may have provided a channel for the seasonal migration of plesiosaurs.

关键词： Freshwater plesiosaur Middle Jurassic Jinchang Gansu Province Palaeobiogeography

Application value of biofluid-based biomarkers for the diagnosis and treatment of spinal cord injury

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Neural Regeneration Research 2022年第5期17卷 963-971页

作者： Hong-da Wang Zhi-Jian Wei Jun-Jin Li Shi-qing feng Department of Orthopedics Tianjin Medical University General HospitalTianjinChina International Science and Technology Cooperation Base of Spinal Cord Injury Tianjin Key Laboratory of Spine and Spinal CordTianjin Medical University General HospitalTianjinChina Department of Orthopedics Qilu HospitalCheeloo College of MedicineShandong UniversityJinanShandong ProvinceChina Shandong University Center for Orthopedics Cheeloo College of MedicineShandong UniversityJinanShandong ProvinceChina

Recent studies in patients with spinal cord injuries(SCIs)have confirmed the diagnostic potential of biofluid-based biomarkers,as a topic of increasing interest in relation to SCI diagnosis and *** paper reviews the research progress and application prospects of recently identified SCI-related *** structural proteins,such as glial fibrillary acidic protein,S100-β,ubiquitin carboxy-terminal hydrolase-L1,neurofilament light,and tau protein were correlated with the diagnosis,American Spinal Injury Association Impairment Scale,and prognosis of SCI to different *** factors,including interleukin-6,interleukin-8,and tumor necrosis factorα,are also good biomarkers for the diagnosis of acute and chronic SCI,while non-coding RNAs(micro RNAs and long non-coding RNAs)also show diagnostic potential for *** elements(Mg,Se,Cu,Zn)have been shown to be related to motor recovery and can predict motor function after SCI,while humoral markers can reflect the pathophysiological changes after *** factors have the advantages of low cost,convenient sampling,and ease of dynamic tracking,but are also associated with disadvantages,including diverse influencing factors and complex level *** various proteins have been verified as potential biomarkers for SCI,more convincing evidence from large clinical and prospective studies is thus required to identify the most valuable diagnostic and prognostic biomarkers for SCI.

关键词： biomarker diagnosis inflammatory cytokine motor recovery non-coding RNA prognosis spinal cord injury structural protein trace element