检索结果-南通市图书馆

Chinese Physics Letters 2010年第6期27卷 13-15页

作者： zhu zhen-Chao ZHANG Yu-Qing Key Lab of Computer Networks and Information Security of Ministry of Education Xidian University Xi'an 710071 National Computer Network Intrusion Protection Center Graduate University Chinese Academy of Sciences Beijing 100049

In a recent paper [Chin. Phys. Lett 25（2008）1187], a quantum secret sharing scheme between multiparty and multiparty was presented. We show that the protocol is not secure because the last member in Alice＇s group can illegally obtain most secret messages without introducing any error. Finally, a possible way to avoid the security flaw is suggested.

关键词： CRYPTOGRAPHY QUANTUM communication UNITARY transformations ERROR analysis (Mathematics) SECURITY systems

Optical coatings for fiber lasers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光学精密工程 2005年第4期13卷 480-482页

作者： HONG Dong-mei zhu zhen YUE Wei North China Research Institute of Electro-optics BeiJing 100015 China

Fiber laser is the future development direction for the high energy lasers. This paper describs two kinds of optical coatings for fiber laser, including long and short wave pass filters. The one characteristic of fiber laser coatings lies in that coatings should separate two closely wavelength light including laser pump wavelength (980 nm) and laser irradiation wavelength(1 050～1 100 nm). At the same time, the coatings should have high laser damage threshold.

关键词：光纤激光器光学涂覆技术结构设计波长

Responsibility Determination:Free Will and Legal Responsibility in the Ag of Artificial Intelligence

在线全文

学校读者我要写书评

暂无评论

Frontiers of Law in China-Selected Publications from Chinese Universities 2022年第1期17卷 122-139页

作者： zhu zhen Research Center of Jurisprudence/School of Law Jilin UniversityChangchun 130015China

Free will is the foundation of determination of *** enginnering represented by technologies of gene editing,artificial medical devices and AI have fundamentally challenged the concept of free will and so have significantly influenced determination of legal *** challenges are fundamental,not instrumental,and can be divided into two aspects in legal ***,the direct challenge,that is,the emerging technology represented by genetic engineering and artificial narrow intelligence(ANI)has challenged the concept of free *** the would-be ultimate challenge,that is,presented by an artificial general intelligence(AGI)agent that is considered to reach humanlevel free will,can be a legal subject,thus taking full legal *** direct challenge constitutes a new"forgiveness"condition for taking *** would-beultimate challenge deserves significant attention,because the concept of free will is not only about human responsibility,but also about human dignity.

关键词： responsibility responsibility determination free will artificial intelligence(AI)

Hepatitis C virus and antiviral innate immunity:Who wins at tug-of-war?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第13期21卷 3786-3800页

作者： Da-Rong Yang Hai-zhen zhu Department of Molecular Medicine of College of Biology State Key Laboratory of Chemo/Biosensing and ChemometricsHunan University Research Center of Cancer Prevention and Treatment Translational Medicine Research Center of Liver CancerHunan Provincial Tumor Hospital (Affiliated Tumor Hospital of Xiangya Medical School of Central South University)

Hepatitis C virus(HCV) is a major human pathogen of chronic hepatitis and related liver diseases. Innate immunity is the first line of defense against invading foreign pathogens, and its activation is dependent on the recognition of these pathogens by several key sensors. The interferon(IFN) system plays an essential role in the restriction of HCV infection via the induction of hundreds of IFN-stimulated genes(ISGs) that inhibit viral replication and spread. However, numerous factors that trigger immune dysregulation, including viral factors and host genetic factors, can help HCV to escape host immune response, facilitating viral persistence. In this review, we aim to summarize recent advances in understanding the innate immune response to HCV infection and the mechanisms of ISGs to suppress viral survival, as well as the immune evasion strategies for chronic HCV infection.

关键词： Hepatitis C virus Interferon Interferonstimulated

Functional analysis of MdSUT2.1,a plasma membrane sucrose transporter from apple

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2023年第3期22卷 762-775页

作者： ZHANG Bo FAN Wen-min zhu zhen-zhen WANG Ying ZHAO zheng-yang State Key Laboratory of Crop Stress Biology for Arid Areas College of HorticultureNorthwest A&F UniversityYangling 712100P.R.China Shaanxi Research Center of Apple Engineering and Technology Yangling 712100P.R.China

Sugar content is a determinant of apple(Malus×domestica Borkh.)***,the molecular mechanism underlying sucrose accumulation in apple fruit remains ***,this study reported the role of the sucrose transporter MdSUT2.1 in the regulation of sucrose accumulation in *** MdSUT2.1 gene encoded a protein with 612 amino acid residues that could be localized at the plasma membrane when expressed in tobacco leaf ***2.1 was highly expressed in fruit and was positively correlated with sucrose accumulation during apple fruit ***,complementary growth assays in a yeast mutant validated the sucrose transport activity of ***2.1 overexpression in apples and tomatoes resulted in significant increases in sucrose,fructose,and glucose contents compared to the wild type(WT).Further analysis revealed that the expression levels of sugar metabolism-and transport-related genes SUSYs,NINVs,FRKs,HXKs,and TSTs increased in apples and tomatoes with MdSUT2.1 overexpression compared to ***,unlike the tonoplast sugar transporters MdTST1 and MdTST2,the promoter of MdSUT2.1 was not induced by exogenous *** findings provide valuable insights into the molecular mechanism underlying sugar accumulation in apples.

关键词： apple MdSUT2.1 sugar transport plasma membrane

Purification and Immunity Analysis of Recombinant 6His-HPT Protein Expressed in ***

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2003年第2期16卷 149-156页

作者： LI-CHEN YANG zhen zhu XIAO-GUANG YANG Plant Genetic Manipulation Laboratory Institute ofGeneticsChinese Academy of SciencesBeijing 100101China Key laboratory of Trace Element Nutrition ofthe Ministry of Health ChinaInstitute of Nutrition and Food SafetyChinese Centerfor Diseases Control and PreventionBeijing 100050Chin

To obtain HPT protein (Hygromycin B Phosphotransferase), a kind of plant selective maker gene product expressed from *** and to prepare the polyclonal antibody (pAbs) against it. Methods HPT cDNA fragment was obtained by PCR and was inserted into the prokaryotic expressing vector pBV222. Then the constructed recombinant plasmid pBV222-HPT was transfered into *** DH5?for HPT expression. The recombinant expressing system was confirmed by restriction endonuclease digestion, DNA sequencing and protein expression. *** cells were lysed by sonication and detergent dissolution. After cell membrane was extracted, the inclusion bodies were denatured by 8 mol/L Urea and purified with metal chelate affinity chromatography on Ni-NTA agarose under denaturing condition. The purified 6His-HPT was characterized by SDS-PAGE, and used to immunize rabbit. The titer and specificity of antisera were detected by ELISA and Western blot respecitively. Results Analysis of DNA sequence and restricted enzymes showed that the sequence of PBV222-HPT plasmid was correct. The amount of recombinant HPT expressed in *** accounted for 30% of total cellular proteins. From 1 liter of fermentative bacteria about 22 milligrams of pure recombinant HPT was isolated with purity above 95%. The recombinant HPT protein could produce high titer antiserum in rabbits and show good immunity activity. Western blot showed specific binding reaction between the antiserum to the purified 6His-HPT protein and their expressed products (plants protein and bacterial protein). Conclusion HPT protein can be expressed and purified from *** by a relatively simple method, which has high immunity activity.

关键词： Organisms Genetically Modified DNA Bacterial Electrophoresis Polyacrylamide Gel Escherichia coli Genetic Engineering Genetic Markers Phosphotransferases (Alcohol Group Acceptor) Plasmids Polymerase Chain Reaction Recombinant Proteins Research Support Non-U.S. Gov't

Characterization of Pr-CeO_2 Nano-crystallites Prepared by Low-temperature Combustion&Hydrothermal Synthesis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第10期25卷 1270-1274页

作者： zhu zhen-Feng WANG Bao-Li MA Jian-Zhong School of Materials Science and Engineering Shaanxi University of Science ＆ Technology Xianyang 712081 China

Pr-CeO2 Nano-crystalline red pigments were prepared by low-temperature combustion with a later hydrothermal treatment using Ce（NO3）3·6H2O and Pr6O11 as raw materials. The phase composition, coloring mechanism and morphology of pigments were analyzed by XRD, SEM, EDS and XPS. Results showed that Pr-CeO2 solid solution with a fluorite structure was obtained by the diffusion of Pr^＋3 into CeO2 crystal lattice during the synthesis process. XPS analysis indicated that Pr^＋3 substitutes Ce^＋4 in CeO2 and is compensated by oxygen vacancies. Compared with low-temperature combustion synthesis, the Pr-CeO2 pigments prepared with a subsequent hydrothermal treatment have an average grain size of about 16.70 nm, and the crystallinity and red tonality are improved.

关键词： low-temperature combustion hydrothermal treatment Pr-CeO2 pigments,nano-crystalline

Comparison between Cooling Rate Dependence of Macroscopic and Microscopic Quantities in Simulated Aluminium Glass

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第11期17卷 821-823页

作者： LIU Chang-Song zhu zhen-Gang Laboratory of Internal Friction and Defects in Solids Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031

Constant-pressure molecular dynamics simulations and an analysis of the local atomic structures have been performed to study the cooling rate dependence of some macroscopic and microscopic quantities in aluminium *** quantities,enthalpy and density,see an observable but small dependence on the cooling *** ordering units exhibit strong cooling rate dependence,which is responsible for the dependence of the enthalpy and the density on the cooling rate;while the almost independence of some microstructural units such as the 1541,1431 and 1421 pairs of the cooling rate may lead to a small dependence of the enthalpy and the density on the cooling rate.

关键词： quantities independence enthalpy

Scalable protocol for cross-domain group password-based authenticated key exchange

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2015年第1期9卷 157-169页

作者： Cong GUO Zijian ZHANG Liehuang zhu Yu-an TAN zhen YANG Beijing Engineering Research Center of Massive Language Information Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 China

Cross-domain password-based authenticated key exchange （PAKE） protocols have been studied for many years. However, these protocols are mainly focusing on multi-participant within a single domain in an open network environment. This paper proposes a novel approach for designing a cross-domain group PAKE protocol, that primarily handles with the setting of multi-participant in the multi- domain. Moreover, our protocol is proved secure against active adversary in the Real-or-Random （ROR） model. In our protocol, no interaction occurs between any two domain authentication servers. They are regarded as ephemeral certificate authorities （CAs） to certify key materials that participants might subsequently use to exchange and agree on group session key. We further justify the computational complexity and measure the average computation time of our protocol. To the best of our knowledge, this is the first work to analyze and discuss a provably secure multi-participant cross-domain group PAKE protocol.

关键词： cross-domain password-based authenticated key exchange (PAKE) group key exchange Real-Or-Random (ROR) model provable secure

Metal-organic framework(MOF)-derived selenidation strategy to prepare porous(Zn,Cu)CoSex micro/nanostructures for sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第12期41卷 4104-4115页

作者： Ye-Mao Lin Hao-Sen Fan Cai-zhen zhu Jian Xu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China College of Materials Science and Metallurgy Engineering Guizhou UniversityGuiyang 550025China

Owning to the wide distribution,low cost,and similar chemical-electrochemical properties with lithium,sodium-ion batteries(SIBs) have attracted much attention during recent years and may have the potential to replace the commercial lithium-ion ***,facile and simple bottom-up approach has been rationally applied to fabricate carbon-encapsulated ZnSe@CoSe_(2)micro spheres and Cu_(2)Se@CoSe_(2)*** as-prepared ZnSe@-CoSe_(2)microspheres and Cu_(2)Se@CoSe_(2)nanocubes composites inherited the original structure of ZnCo-MOF and CuCo-MOF,***,both ZnSe@CoSe_(2)micro spheres and Cu_(2)Se@CoSe_(2)nanocubes delivered excellent electrochemical performance when presented as anode materials for *** ZnSe@CoSe2micro spheres and Cu_(2)Se@CoSe_(2)nanocubes electrode could display a long-term cycling stability with a reversible capacity of 525 and 423 mAh·g^(-1)at the current density of 1 A·g^(-1)after 500 cycles,***,even at a high current density of 5 A·g^(-1),ZnSe@CoSe_(2)microsphere could still maintain 520 mAh·g^(-1)after 500 cycles,demonstrating remarkable capacity and excellent cycling *** high performances were beneficial from the unique hollow and porous structure of ZnSe@CoSe_(2)microspheres and Cu_(2)Se@CoSe_(2)nanocubes derived from the precursor which facilitate the transport of sodium ions,contributing to high capacity,improved excellent cycle stability and rate capability.

关键词： Metal selenides Prussian blue analogue Sodium-ion batteries Metal-organic frameworks(MOF)