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The Pressure in Operator Algebras

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Acta Mathematica Sinica,English Series 2008年第6期24卷 983-996页

作者： Cheng jun hou Department of Mathematics Qufu Normal University Qufu 273165 P. R. China

We introduce two notions of the pressure in operator algebras, one is the pressure Pα（π, T） for an automorphism α of a unital exact C^＊-algebra A at a self-adjoint element T in A with respect to a faithful unital ＊-representation π the other is the pressure Pτ,α（T） for an automorphism α of a hyperfinite von Neumann algebra M at a self-adjoint element T in M with respect to a faithful normal α-invariant state τ. We give some properties of the pressure, show that it is a conjugate invaxiant, and also prove that the pressure of the implementing inner automorphism of a crossed product A×α Z at a self-adjoint operator T in A equals that of α at T.

关键词： exact C^*-algebra hyperfinite von Neumann algebra entropy pressure crossed product

Development of an ultrafast detector and demonstration of its oscillographic application

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Nuclear Science and Techniques 2022年第6期33卷 54-61页

作者： hou-Zhi cai Qiu-Yan Luo Kai-Xuan Lin Dong Wang jun-Kun Huang Jin-Yuan Liu Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

A dilation X-ray detector(DIXD)based on time dilation and microchannel plate(MCP)gated technology has been *** DIXD passes a driving pulse along the transmission photocathode(PC)to obtain a dilated electron signal and finally achieves a high time resolution of 12 ***,the waveform of the PC driving pulse can be obtained using the DIXD,and a DIXD oscillographic function can be *** experiment is presented to demonstrate the DIXD *** waveform of the PC driving pulse from points t_(1) to t_(12) is achieved by the *** waveform agrees well with that measured by a high-speed oscilloscope with a difference of less than 6%.The maximum theoretical bandwidth of the DIXD oscilloscope is theoretically *** bandwidth is limited by the potential difference between the PC and *** the potential difference is 3.4 kV,the theoretical limiting bandwidth is 1000 *** bandwidth increases with an increase in the potential difference.

关键词： Inertial confinement fusion Ultrafast diagnosis Dilation X-ray detector X-ray framing camera Microchannel plate

Reverse genetics systems for SARS-CoV-2:Development and applications

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Virologica Sinica 2023年第6期38卷 837-850页

作者： hou-Li cai Yao-Wei Huang Department of Veterinary Medicine Zhejiang UniversityHangzhou310058China State Key Laboratory for Animal Disease Control and Prevention South China Agricultural UniversityGuangzhou510642China Guangdong Laboratory for Lingnan Modern Agriculture College of Veterinary MedicineSouth China Agricultural UniversityGuangzhou510642China

The recent emergence of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)caused serious harm to human health and struck a blow to global economic *** on SARS-CoV-2 has greatly benefited from the use of reverse genetics systems,which have been established to artificially manipulate the viral genome,generating recombinant and reporter infectious viruses or biosafety level 2(BSL-2)-adapted non-infectious replicons with desired *** tools have been instrumental in studying the molecular biological characteristics of the virus,investigating antiviral therapeutics,and facilitating the development of attenuated vaccine ***,we review the construction strategies,development,and applications of reverse genetics systems for SARS-CoV-2,which may be applied to other CoVs as well.

关键词： SARS-CoV-2 Reverse genetics systems Infectious clones Replicons Live attenuated vaccines

Generation of Intensity Squeezing in Laser Diodes by Weak External Cavity Feedback

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Chinese Physics Letters 1996年第10期13卷 734-736页

作者： ZHANG Tian-cai hou Zhan-jia WANG jun-min XIE Chang-de PENG Kun-chi Institute of Opto-Electronics Shanxi UniversityTaiyuan 030006

We report the generation of intensity squeezing in a single-mode laser diode by weak external cavity feedback. The measurable squeezing of the output beam is 4.7%, corrected to 8.9% for the actual squeezing. This prov... 详细信息

关键词： measurable squeezing corrected

Mitochondrial genome of Chthamalus challengeri(Crustacea:Sessilia): gene order comparison within Chthamalidae and phylogenetic consideration within Balanomorpha

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Acta Oceanologica Sinica 2019年第6期38卷 25-31页

作者： Panpan Chen jun Song Xin Shen Yuefeng cai Ka hou Chu Yongqi Li Mei Tian Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology Huaihai Institute of TechnologyLianyungang 222005China Co-Innovation Center of Jiangsu Marine Bio-industry Technology Lianyungang 222000China Simon F. S. Li Marine Science Laboratory School of Life SciencesThe Chinese University of Hong KongShatinN.T.Hong KongChina

Acorn barnacles are important model species in researches on intertidal ecology, larval development and biofouling. At present, with the development of mitochondrial genomics, it is helpful to understand the phylogenetic relationship from the mitogenomic level. The complete mitochondrial genome of Chthamalus challengeri was presented. The genome is a circular molecule of 15 358 bp. Compared with other species in Balanomorpha, the non-coding region is longer, while the length of the genes is similar to the other species. The overall A+T content of the mitochondrial genome of C. challengeri is 70.5%. There are variations of initiation and stop codons in the known Balanomorpha mitochondrial genomes. The C. challengeri and C. antennatus within the same genus share the identical gene arrangement. However, the gene arrangement of different genera in Chthamalidae is different, as there is a translocation between two tRNA genes and an inversion involving a large gene block. In particular, both srRNA and lrRNA of the two species in Chthamalus are encoded in the heavy strand, differing from the former Balanomorpha species. The topology and gene arrangement in Chthamalidae support each other. Phylogenetic analysis indicates that the Chthamalidae is monophyletic, while the Balanidae and Archaeobalanidae are polyphyletic.

关键词： Balanomorpha Chthamalus challengeri mitochondrial genome gene rearrangement phylogeny

An Optimal Resources Configuration Scheme for Caching-Based Content Distribution in BackhaulLimited Small Cell Networks

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China Communications 2018年第1期15卷 12-22页

作者： Jingfeng cai Ronghui hou Yinghong Ma State Key Lab of Integrated Service Networks Xidian University

In this paper, we study the problem of resource allocation in small cell networks with distributed caching, that is, how to divide the spectrum resources for backhaul and access in order to improve network performance. We formulate our concerned problem by using multi-dimensional Markov model. Our problem considers that each user may access multiple small cell base stations. We conduct simulation experiments to evaluate the performance of our proposed resource allocation scheme. Our simulation results show that the appropriate spectrum resource allocation is important to improve network performance.

关键词： small cell wireless backhaul re-source allocation content distribution cache

Enhancing vertically stacked skin display compactness via discrete layer preparation

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Light(Science & Applications) 2024年第10期13卷 1990-1991页

作者： Yichen cai Xiangyu hou Wei Chen Department of Chemistry National University of SingaporeSingapore 117543Singapore Department of Physics National University of SingaporeSingapore 117542Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China National University of Singapore(Suzhou)Research Institute Suzhou 215123China

The discrete preparation of functional layers followed by lamination for all-organic active-matrix organic light-emitting diodes enables an ultrahigh aperture ratio and reliable conformability,promising significant po... 详细信息

关键词： preparation enable layer

Theoretical development for DSMC local time stepping technique

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Science China(Technological Sciences) 2012年第10期55卷 2750-2756页

作者： cai GuoBiao SU Wei hou FengLong School of Astronautics Beihang UniversityBeijing 100191China Chinese Academy of Space Technology Beijing 100049China

The direct simulation Monte Carlo(DSMC) method is the most mature and wildly used approach for nonequilibrium gas flow *** phenomenological nature of this method brings flexibility to the computation *** this study,the theoretical foundations to decouple the molecular motion and collision within a time step are discussed in detail,which can be treated as criterions for the DSMC *** on the theoretical developments,an improved local time stepping scheme is proposed,which specifies the movement time attribute and the collision time attribute for each representative particle.A free flow about a sphere body is considered as an example,which is compared with the calculations using the published local time stepping *** results show that the improved local time scheme is valid and is promising in realizing flow structures with strong variations.

关键词： DSMC method local time step movement time attribute collision time attribute

Degradation of 2,4-dichlorophenoxyacetic acid in water by ozonehydrogen peroxide process

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Journal of Environmental Sciences 2006年第6期18卷 1043-1049页

作者： YU Ying-hui MA jun hou Yan-jun School of Municipal and Environmental Engineering Harbin Institute of Technology P.O. Box 2627 Harbin 150090 China

This study reports an investigation into the degradation of 2,4-dichlorophenoxyacetic acid in bubble contactor column by O2/H2O2 process, which is widely used as a principal advanced oxidation process. The degradation of 2,4-dichlorophenoxyacetic acid was studied under different H202/O3 molar ratio and pH value. Meanwhile, TOC removal was investigated both in distilled water and tap water. The influences of ozone transfer and consumed hydrogen peroxide were also discussed. The degradation products and oxidation intermediates were identified by GC-MS and LC-MS. A possible reaction mechanism was thus proposed.

关键词： 2,4-dichlorophenoxyacetic acid ozone hydrogen peroxide advanced oxidation process