检索结果-南通市图书馆

A Flaw in the Security Proof of BDOP-PEKS and PEKS-STAT

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2007年第1期12卷 25-28页

作者： ZHANG Yajuan ZHU Yuefei GU Chunxiang fu changchun Institute of Information Engineering InformationEngineering University Zhengzhou 450002 Henan China Key Laboratory of Information Engineering GuangzhouUniversity Guangzhou 510006 Guangdong China School of Computer Wuhan University Wuhan 430072Hubei China

Provable security has been widely used for analyzing the security of cryptosystems. Its main idea is to reduce the security to some well-defined computational assumption. The reduction process is called the security proof. In this paper, we find a flaw in the security proof of BDOP-PEKS and PEKS-STAT, present a new conclusion for the security of BDOP-PEKS, and give a security proof. The flaw in the security proof of PEKS-STAT can be fixed in the same way. Finally we conclude some steps of security proof, and emphasize that the probability is as important as the construction.

关键词： provable security public key encryption with keyword search(PEKS) GBDH BDOP-PEKS PEKS-IND-CKA

DEVELOPMENT OF A VACUUM SPARK DISCHARGE SOURCE

在线全文

学校读者我要写书评

暂无评论

中国科学院大学学报(中英文) 1996年第1期 96-102页

作者： Guo Yu-bin Li fu-tian(changchun Inatitide of Optics and Fine Mechanics,Academia Sinica, changchun 130022)

ＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥ￥ＧｕｏＹｕ－ｂｉｎ；ＬｉＦｕ－ｔｉａｎ（Ｃｈａｎｇｃｈ... 详细信息

ＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥＤＥＶＥＬＯＰＭＥＮＴＯＦＡＶＡＣＵＵＭＳＰＡＲＫＤＩＳＣＨＡＲＧＥＳＯＵＲＣＥ￥ＧｕｏＹｕ－ｂｉｎ；ＬｉＦｕ－ｔｉａｎ（ＣｈａｎｇｃｈｕｎＩｎａｔｉｔｉｄｅｏｆＯｐｔｉ...

关键词： extreme ultraviolet vacuum spark source plasma

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

渤南XX区域复杂结构油田高效钻井技术

石油工业技术监督 2024年第6期40卷 53-59页

作者：付常春刘佳张博邸泽朝张换成郭东红邱小龙中海石油(中国)有限公司天津分公司天津300459 中海油田服务股份有限公司油化塘沽作业公司天津300459 中海油能源发展股份有限公司工程技术分公司天津300452

渤南区域XX油田目标开发层系为沙河街组,平均井深在3800 m以上,该油田含油层位多,钻遇地质条件复杂,在开发井实施过程中井壁失稳、漏失、卡钻现象频发,严重影响钻井作业安全高效进行。以油田地质特点为背景,深入分析该区域钻井技术难点... 详细信息

渤南区域XX油田目标开发层系为沙河街组,平均井深在3800 m以上,该油田含油层位多,钻遇地质条件复杂,在开发井实施过程中井壁失稳、漏失、卡钻现象频发,严重影响钻井作业安全高效进行。以油田地质特点为背景,深入分析该区域钻井技术难点,通过实施井眼轨迹优化、井眼轨迹控制技术、井身结构精细化设计、钻井液优化设计等技术,在调整井实钻过程中,未出现粘卡、地层坍塌、漏失等复杂情况,套管未旋转顺利下放到位,钻井时效100%,平均单井实际工期13.55 d,较平均单井设计工期节约6.2 d,提速31.4%。该技术的成功应用,对渤南区域沙河街组复杂结构油藏高效开发具有借鉴意义。

关键词：井壁失稳井眼轨迹控制井身结构钻井液

Characterizing structural variants based on graph-genotyping provides insights into pig domestication and local adaption

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2024年第4期51卷 394-406页

作者： Xin Li Quan Liu Chong fu Mengxun Li changchun Li Xinyun Li Shuhong Zhao Zhuqing Zheng Key Lab of Agricultural Animal Genetics Breeding and Reproduction of Ministry of Education and Key Laboratory of Swine Genetics and Breeding of Ministry of AgricultureCollege of Animal Science and TechnologyHuazhong Agricultural UniversityWuhanHubei 430070China Institute of Agricultural Biotechnology Jingchu University of TechnologyJingmenHubei 448000China The Cooperative Innovation Center for Sustainable Pig Production WuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

Structural variants(SVs),such as deletions(DELs)and insertions(INSs),contribute substantially to pig genetic diversity and phenotypic *** a library of SVs discovered from long-read primary assemblies and short-read sequenced genomes,we map pig genomic SVs with a graph-based method for re-genotyping SVs in 402 *** results demonstrate that those SVs harboring specific trait-associated genes may greatly shape pig domestication and local *** characterization of SVs reveals that some population-stratified SVs may alter the transcription of genes by affecting regulatory *** identify that the genotypes of two DELs(296-bp DEL,chr7:52,172,101e52,172,397;278-bp DEL,chr18:23,840,143 e23,840,421)located in muscle-specific enhancers are associated with the expression of target genes related to meat quality(FSD2)and muscle fiber hypertrophy(LMOD2 and WASL)in *** results highlight the role of SVs in domestic porcine evolution,and the identified candidate functional genes and SVs are valuable resources for future genomic research and breeding programs in pigs.

关键词： Pigs Structural variation Selection signatures Regulatory elements

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

苏打盐碱地稻田养鱼

土壤通报 2001年第Z1期32卷 174-176页

作者：杨富亿中国科学院长春地理研究所吉林长春130021

本文以吉林省西部大安市叉干镇科技示范区为例，介绍了苏打盐碱地井灌稻田养鱼开发的生态效益及关键技术．

关键词：苏打盐碱地稻田养鱼生态效益关键技术东北地区

QUANTUM CHEMICAL STUDIES ON A NEW ORGANOSULfuR REACTION MECHANISM

在线全文

学校读者我要写书评

暂无评论

中国科学院大学学报(中英文) 1994年第2期 163-172页

作者： Zhu Jin Chen Ya-ling(Institute of Chemistry, Academia Sinica, Beijing 100080)Zeng Guang-fu(changchun Institute of Applied Chemistry, Academia Sinica, changchun 130022)Yan Da-yu(Graduate School of University of Science and Technology of China, Beijing 100

ＱＵＡＮＴＵＭＣＨＥＭＩＣＡＬＳＴＵＤＩＥＳＯＮＡＮＥＷＯＲＧＡＮＯＳＵＬＦＵＲＲＥＡＣＴＩＯＮＭＥＣＨＡＮＩＳＭＺｈｕＪｉｎ；ＣｈｅｎＹａ－ｌｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳｉｎ... 详细信息

ＱＵＡＮＴＵＭＣＨＥＭＩＣＡＬＳＴＵＤＩＥＳＯＮＡＮＥＷＯＲＧＡＮＯＳＵＬＦＵＲＲＥＡＣＴＩＯＮＭＥＣＨＡＮＩＳＭＺｈｕＪｉｎ；ＣｈｅｎＹａ－ｌｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０...

关键词： organosulfur reaction cyclization de-hydroxyl process

Iron-Catalyzed Direct Synthesis of Benzofurans and Pyrans from Simple Phenols and Propargyl Alcohols via a one-pot Procedure

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Iron-Catalyzed Direct Synthesis of Benzofurans and Pyrans fr...

Silicon Micro-hole Array Prepared by ICP

中国化学会第十届全国有机合成化学学术研讨会

作者： Feng-Quan Yuan and fu-She Han changchun Institute of Applied Chemistry,Chinese Academy of Sciences,changchun,130022,China

＜正＞Benzofuran and benzopyrans are valuable structural motifs in both naturally occurring and artificial compounds with interesting biological activities and photochromic *** most popular methods for accessing such types of scaffolds relied mainly on the transition-metal-catalyzed intramolecular annulation ofpre-prepared orthoalkynylated phenol derivatives or aryl alkynyl ethers.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Silicon Micro-hole Array Prepared by ICP

2-乙基己基膦酸单(2-乙基己基)酯萃取稀土元素机理的研究 ***(EHP)从硫酸溶液中萃取Er(III)的平衡反应

Photonics Asia 2004;Optoelectronics,Microelectronics,and Nanotech

作者： Qingduo Duanmu,Anping Zhang,Guozheng Wang,Yanjun Gao,Ye Li,Delong Jiang,Lichen fu,Jingquan Tian changchun University of Science and Technology,changchun,130022,China

This paper reports on a silicon micro-hole arrays (Si-MHA) prepared by Inductively Coupled Plasma (ICP) etching, a dry etching method. By ICP etcher, we carried out several experimental researches and

关键词： micro-hole,arrays,etching,ICP,micromachining

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

化学学报 1988年第6期46卷 492-495页

作者：李德谦王忠怀陈志夫中国科学院长舂应用化学研究所长春

2-乙基己基膦酸单(2-乙基己基)酯[HEH(EHP),HL]是萃取分离稀土元素的有效萃取剂[1].HEH(EHP)从矿物酸溶液中萃取Ho(Ⅲ)—Er(Ⅲ)两组分元素时.

关键词： EHP Er II.HEH 稀土元素 ⅢB族元素硫酸溶液 III 己基乙基链烷基