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Immunosenescence and age-related viral diseases

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Science China(Life Sciences) 2013年第5期56卷 399-405页

作者： MA y.ngChao fang min CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences

Immunosenescence is described as a decline in the normal functioning of the immune system associated with physiologic *** contributes to reduced efficacy to vaccination and increased susceptibility to infectious diseases in the *** studies of laboratory animal models of ageing or donor lymphocyte analysis have identified changes in immunity caused by the ageing *** of these studies have identified phenotypic and functional changes in innate and adaptive ***,it is unclear which of these defects are critical for impaired immune defense against *** review describes the changes that occur in innate and adaptive immunity with ageing and some age-related viral diseases where defects in a key component of immunity contribute to the high mortality rate in mouse models of ageing.

关键词： immunosenescence physiologic ageing infectious disease

Practical Quantum Private Query with Classical Participants

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Chinese Physics Letters 2019年第3期36卷 9-13页

作者： min Xiao Di-fang Zhang Institute of Computer Forensics Chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing University of Posts and Telecommunications

Quantum key distribution(QKD)-based quantum private query(QPQ) is a practical application of QKD, which relaxes the security condition of perfectly concealing a private query to a cheating-sensitive strategy. We propose a QPQ protocol based on the delegated QKD scheme(DQKD-based QPQ), in which two almost ‘classical' clients(data user and database owner) can establish a 1-out-of-N oblivious key with the help of a cloud server with full quantum ability. Concretely, the two classical participants in the DQKD-based QPQ only need to access the quantum channel and reorder qubits, and the costly quantum operations, quantum state preparation and measurement are outsourced to a full quantum server in the cloud without leaking participants' privacy. The proposed protocol not only provides a cloud-based framework of QKD-based QPQ, but also obtains better security by a real-time security check, which can protect the security of the database and user against all potential attacks even if the quantum server is assumed to be a powerfully untrusted adversary.

关键词： QKD Private Query Participants

Label correlation for partial label learning

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Journal of Systems Engineering and Electronics 2022年第5期33卷 1043-1051页

作者： GE Lingchi fang min LI Haikun CHEN Bo School of Computer Science and Technology Xidian UniversityXi’an 710071China

Partial label learning aims to learn a multi-class classifier,where each training example corresponds to a set of candidate labels among which only one is *** studies in the label space have only focused on the difference between candidate labels and non-candidate *** far,however,there has been little discussion about the label correlation in the partial label *** paper begins with a research on the label correlation,followed by the establishment of a unified framework that integrates the label correlation,the adaptive graph,and the semantic difference maximization *** work generates fresh insight into the acquisition of the learning information from the label ***,the label correlation is calculated from the candidate label set and is utilized to obtain the similarity of each pair of instances in the label *** that,the labeling confidence for each instance is updated by the smoothness assumption that two instances should be similar outputs in the label space if they are close in the feature *** last,an effective optimization program is utilized to solve the unified *** experiments on artificial and real-world data sets indicate the superiority of our proposed method to state-of-art partial label learning methods.

关键词： pattern recognition partial label learning label correlation disambiguation

TiO_2/polyaniline composites:An efficient photocatalyst for the degradation of methylene blue under natural light

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Chinese Chemical Letters 2007年第10期18卷 1273-1277页

作者： fang Wang Shi Xiong min Department of Chemistry Key Laboratory of Resource and Environmental Chemistry of West China Hexi University Zhangye 734000 China

Polyaniline （PAn） sensitized nanocrystalline TiO2 composites （TiO2/PAn） were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue （MB）. The results showed that PAn was able to sensitize TiO2 efficiently and the composite photocatalyst could be activated by absorbing both the ultraviolet and visible light （λ： 190 ～ 800 nm）, whereas pure TiO2 absorbed ultraviolet light only （λ 〈 380 nm）. Under the irradiation of natural light, MB could be degraded more efficiently on the TiO2/PAn composites than on the TiO2 Furthermore, it could be easily separated from the solution by simple sedimentation.

关键词： TiO2/PAn Composite photocatalyst Methylene blue Degradation Natural light

Prediction of hypersonic boundary layer transition with variable specific heat on plane flow

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Science China(Physics,Mechanics & Astronomy) 2011年第11期54卷 2064-2070页

作者： FAN min CAO Wei fang XiaoJie Department of Mechanics Tianjin University Tianjin 300072 China Liu-Hui Center of Applied Mathematics Nankai University and Tianjin University Tianjin 300072 China

When an aircraft flies at a hypersonic speed,the temperature of gas inner boundary layer near the wall is so high that the specific heat is no longer a constant but dependent upon the *** is necessary to consider its effect on transition *** this paper,the transition locations of hypersonic plane boundary layer are predicted with the improved e N method,and the results of the specific heat dependent upon temperature are compared with those of constant specific *** flow parameters are taken as those corresponding to the condition at a height of 40 km and the Mach numbers of oncoming flow are 6,7,and 8,*** is found that the transition locations calculated by the variable specific heat are closer to the leading edge than those by the constant specific *** deviations in most cases are around 30 *** the results prove that the real gas effect should be taken into consideration when one predicts transition location for hypersonic *** the first or second mode wave determines the transition location relies on the oncoming flow Mach number and the wall condition.

关键词： hypersonic flow variable specific heat improved EN method transition prediction

On structure of cluster algebras of geometric type Ⅰ：In view of sub-seeds and seed homomorphisms

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Science China Mathematics 2018年第5期61卷 831-854页

作者： min Huang fang Li yichao y.ng Department of Mathematics Zhejiang University Hangzhou 310027 China Departement de Mathematiques Universite de Sherbrooke Sherbrooke J1K2R1 Canada

Our motivation is to build a systematic method in order to investigate the structure of cluster algebras of geometric type. The method is given through the notion of mixing-type sub-seeds, the theory of seed homomorphisms and the view-point of gluing of seeds. As an application, for(rooted) cluster algebras, we completely classify rooted cluster subalgebras and characterize rooted cluster quotient algebras in detail. Also,we build the relationship between the categorification of a rooted cluster algebra and that of its rooted cluster subalgebras. Note that cluster algebras of geometric type studied here are of the sign-skew-symmetric case.

关键词： seed homomorphism mixing-type sub-seed rooted cluster morphism sub-rooted cluster algebra rooted cluster quotient algebra

Synthesis and AO Resistant Properties of Novel Polyimide Fibers Containing Phenylphosphine Oxide Groups in Main Chain

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Chinese Journal of Polymer Science 2019年第1期37卷 59-67,1-3页

作者： y.ng Zhao Hong Gao Guo-min Li fang-fang Liu Xue-min Dai Zhi-Xin Dong Xue-Peng Qiu Polymer Composites Engineering Laboratory Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences China Academy of Space Technology

A series of co-polyimide(PI)fibers containing phenylphosphine oxide(PPO)group were synthesized by incorporating the bis(4-aminophenoxy)phenyl phosphine oxide(DAPOPPO)monomer into the PI molecular chain followed by dry-jet wet *** effects of DAPOPPO molar content on the atomic oxygen(AO)resistance of the fibers were investigated *** the AO fluence increased from 0to 3.2×1020the mass loss of the fibers showed the dependence on DAPOPPO molar content in co-PI *** PI fiber containing 40%DAPOPPO showed lower mass loss compared to those containing 0%and 20%*** higher AO fluence,the higher DAPOPPO content gave rise to dense carpet-like surface of *** results indicated that the passivated phosphate layer was deposited on the fiber surface when exposed to AO,which effectively prevented fiber from AO *** the DAPOPPO content increasing from 0%to 40%,the retentions of tensile strength and initial modulus for the fibers exhibited obvious growth from 44%to 68%,and 59%to 70%,after AO exposure with the fluence of 3.2×1020The excellent AO resistance benefits the fibers for application in low Earth orbit as flexible construction components.

关键词： Polyimide fibers Bis(4-aminophenoxy)phenyl phosphine oxide(DAPOPPO) Dry-jet wet spinning AO resistance

Monitoring impact of mefenacet treatment on soil microbial communities by PCR-DGGE fingerprinting and conventional testing procedures

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Journal of Environmental Sciences 2006年第2期18卷 373-378页

作者： yE y.ng-fang min Hang LU Zhen-mei College of Life Science and Biotechnology Ningbo University Ningbo 315211 China College of Life Science Zhejiang University Hangzhou 310029 China

The effect of acetanilide herbicide mefenacet on soil microbial communities was studied using paddy soil samples with different short-term treatments. The culturable bacteria （plate counts）, dehydrogenase activity and changes in community structure （denaturing gradient gel electrophoresis （DGGE） analysis） were used for biological community assessments. Mefenacet was a significant stimulus to cultural aerobic bacteria and dehydrogenase activity while Sphingobacterium multivorum y1, a bacterium efficiently degrading the mefenacet, only induced the increasing colony-forming unit （CFU） of bacteria but little effect on dehydrogenase activity during the whole experiment. The degree of similarity between the 16S rDNA profiles of the communities was quantified by numerically analyzing the DGGE band patterns. Similarity dendrograms showed that the microbial community structures of the mefenacet-treated and non-treated soils were not significantly different. But supplement of S. multivorum y1 could increase the diversity of the microbial community in the mefenacet-polluted paddy soil. This work is a new attempt to apply the S. multivorum y1 for remediation of the mefenacet-polluted environments.

关键词： denaturing gradient gel electrophoresis(DGGE) soil microbial diversity mefenacet dehydrogenase

Nonparametric Control Scheme for Monitoring Phase Ⅱ Nonlinear Profiles with Varied Argument Values

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Chinese Journal of Mechanical Engineering 2012年第3期25卷 587-597页

作者： ZHAng y.ng HE Zhen fang Juntao ZHAng min College of Management and Economics Tianjin UniversityTianjin 300072China Faculty of Humanities and Management Tianjin University of Traditional Chinese MedicineTianjin 300193China

Profile monitoring is used to check the stability of the quality of a product over time when the product quality is best represented by a function at each time ***,most previous monitoring approaches have not considered that the argument values may vary from profile to profile,which is common in practice.A novel nonparametric control scheme based on profile error is proposed for monitoring nonlinear profiles with varied argument *** proposed scheme uses the metrics of profile error as the statistics to construct the control *** details about the design of this nonparametric scheme are also *** monitoring performance of the combined control scheme is compared with that of alternative nonparametric methods via *** studies show that the combined scheme is effective in detecting parameter error and is sensitive to small shifts in the *** addition,due to the properties of the charting statistics,the out-of-control signal can provide diagnostic information for the ***,the implementation steps of the proposed monitoring scheme are given and applied for monitoring the blade manufacturing *** the application in blade manufacturing of aircraft engines,the proposed nonparametric control scheme is effective,interpretable,and easy to apply.

关键词： statistical process control profile monitoring nonparametric metric profile error