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An adaptive strategy for statistics collecting in distributed database

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Frontiers of Computer Science 2020年第5期14卷 199-211页

作者： Jintao Gao wenjie liu Zhanhuai Li School of Computer Science Northwestern Polytechnical UniversityXi’an710072China

Collecting statistics is a time-and resource-consuming operation in database *** is even more challenging to efficiently collect statistics without affecting system performance,meanwhile keeping correctness in distributed *** strategies usually consider one dimension during collecting statistics,which is lack of *** this paper,we propose an adaptive strategy for statistics collecting(ASC),which well balances collecting efficiency,correctness of statistics and effect to system *** formally define the procedure of collecting statistics and abstract the relationships among collecting efficiency,correctness of statistics and effect to system performance,and introduce an elastic structure(ESI)storing necessary information generated during proceeding our *** can pick appropriate time to trigger collecting action and filter unnecessary tasks,meanwhile reasonably allocating collecting tasks to appropriate executing locations with right executing models through the information stored at *** implement and evaluate our strategy in a distributed *** show that our solutions generally improve the efficiency and correctness of collecting statistics,moreover,reduce the negative effect to system performance comparing with other strategies.

关键词： statistics collecting distributed database adaptive strategy query optimization

Emerging Bio-relevant Applications of Polymer Mechanochemistry

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Chinese Journal of Chemistry 2024年第17期42卷 2066-2070页

作者： wenjie liu Hai Qian State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China

Polymer mechanochemistry has rapidly evolved since the *** advancements highlight the development of mechanophore platforms for the controlled release of bioactive payloads and the exploration of biocompatible activation *** platforms,ranging from furan-maleimide Diels-Alder adducts to disulfide motifs withβ-carbonate linkages,demonstrate promising prospects in targeted drug ***,supramolecular assemblies and free radical-generating mechanophores present innovative avenues for potential therapeutic *** activation methods,notably high-intensity and/or low-intensity focused ultrasound,hold potential for in vivo ***,challenges persist in comprehending the fundamental physics of ultrasound and its utilization for activation.

关键词： Polymer mechanochemistry Mechanophores Bio-relevant applications Ultrasound Drug delivery

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不同林型橡胶林土壤水分入渗特征及影响因子

水土保持研究 2025年第1期32卷 57-65+72页

作者：马关媛蒋小金刘佳庆刘文杰陈春峰张瑞新疆大学生态与环境学院中国科学院西双版纳热带植物园热带森林生态学重点实验室中国科学院西双版纳热带植物园公共技术中心

[目的]探究不同林型橡胶林土壤入渗特征及其影响因子，为高效、可持续橡胶林的构建提供数据支撑。[方法]以单一橡胶林(SR)、人工雨林橡胶林(AF)、橡胶—益智复合林(AR)、橡胶—可可复合林(RC)、橡胶-茶树复合林(RT)对入渗过程进行拟合... 详细信息

[目的]探究不同林型橡胶林土壤入渗特征及其影响因子，为高效、可持续橡胶林的构建提供数据支撑。[方法]以单一橡胶林(SR)、人工雨林橡胶林(AF)、橡胶—益智复合林(AR)、橡胶—可可复合林(RC)、橡胶-茶树复合林(RT)对入渗过程进行拟合和评价。[结果]纵观0—100 cm土壤剖面，SR容重最大，孔隙度、田间持水量和饱和持水量最小；SR初始入渗速率(0.03 cm/min)、平均入渗速率(0.009 cm/min)、稳定入渗速率(0.005 cm/min)均显著低于橡胶复合林；通过拟合发现Horton模型对胶农复合林入渗过程拟合较好且拟合参数具有物理意义；除非毛管孔隙度外，土壤物理性质与初始入渗速率有极显著相关关系(p0.05),而稳渗前累积入渗量受土壤持水性能的影响显著(p<0.01)。[结论]结合田间入渗过程，采用初始入渗速率、稳定入渗速率和稳渗前累积入渗量来评估不同林型橡胶林土壤水分入渗和储存性能；SR土壤持水能力、渗透性均低于橡胶复合林，其中RC土壤持水能力最好，RT土壤入渗性能最好，因此间作茶树和可可对改善土壤结构及水文特性有重要作用。

关键词：土壤水分入渗物理性质入渗速率拟合模型

Potential application of a novel building-integrated solar facade water heating system in a subtropical climate:A case study for school canteen

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Building Simulation 2023年第10期16卷 1987-2004页

作者： wenjie liu Xinwen liu Chongchao Pan Chunying Li Woonming Lau Yuanli Lyu School of Energy and Environmental Engineering Beijing Advanced Innovation Center for Materials Genome EngineeringCenter for Green InnovationUniversity of Science and Technology BeijingBeijing100083China Division of Building Science and Technology and School of Energy and Environment City University of Hong KongTat Chee AvenueKowloon TongHong KongChina School of Economic and Finance Xi’an Jiaotong UniversityXi’anShaanxi710049China Department of Civil Architecture and EnvironmentXihua UniversityChengdu610097China School of Architecture and Urban Planning Shenzhen UniversityShenzhen518060China Shunde Innovation School University of Science and Technology BeijingFoshan528399China

The design and potential application analysis of the novel solar-absorbing integrated facade module and its corresponding building-integrated solar facade water heating system are presented in this *** with the conventional building envelope,the main novities of the proposed facade module lie in its contributions towards the supplied water preheating to loads and the internal heat gain ***,the proposed building-integrated solar facade water heating system broadens the combination modes of the solar thermal system and the building envelope.A dynamic model is introduced first for system design and performance *** evaluate the energy-saving potential and feasibility of the implementation of the proposed facade module,this paper carried out a suitable case study by replacing the conventional facade module in the ongoing retrofitting project of a kitchen,part of the canteen of a graduate *** detailed thermal performances of three system design options are compared in the typical winter and summer weeks and throughout the year,and then,with the preferred system design,the economic,energy,and environmental effects of the proposed system are *** was found that the system with a high flow rate of the circulating water is *** annual electricity saved reaches 4175.3 kWh with yearly average thermal efficiency at 46.9%,and its corresponding cost payback time,energy payback time,and greenhouse gas payback time are 3.8,1.7,1.7 years,*** study confirms the feasibility and long-term benefits of the proposed building-integrated solar facade water heating system in buildings.

关键词： solar thermal utilization building-integrated solar water heating system novel prefabricated facade module life cycle assessment building retrofitting

RBC:A Memory Architecture for Improved Performance and Energy Efficiency

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Tsinghua Science and Technology 2021年第3期26卷 347-360页

作者： wenjie liu Ke Zhou Ping Huang Tianming Yang Xubin He Department of Computer and Information Sciences Temple UniversityPhiladelphiaPA 19122USA Wuhan National Laboratory of Optoelectronics(WNLO) Huazhong University of Science and TechnologyWuhan 430074China Huanghuai University Zhumadian 463000China

DRAM-based memory suffers from increasing row buffer conflicts,which causes significant performance degradation and power *** memory capacity increases,the overheads of the row buffer conflict are increasingly worse as increasing bitline length,which results in high row activation and precharge *** this work,we propose a practical approach called Row Buffer Cache(RBC)to mitigate row buffer conflict overheads *** the core of our proposed RBC architecture,the rows with good spatial locality are cached and protected,which are exempted from being interrupted by the accesses for rows with poor *** an RBC architecture significantly reduces the overheads of performance and energy caused by row activation and precharge,and thus improves overall system performance and energy *** evaluate RBC architecture using SPEC CPU2006 on a DDR4 memory compared to a commodity baseline memory *** show that RBC improves the overall performance by up to 2:24(16:1%on average)and reduces the memory energy by up to 68:2%(23:6%on average)for single-core *** multi-core simulations,RBC increases the overall performance by up to1:55(17%on average)and reduces memory energy consumption by up to 35:4%(21:3%on average).

关键词： memory system Dynamic Random Access Memory(DRAM) row buffer conflict

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Full-Blind Delegating Private Quantum Computation

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Computers, Materials & Continua 2018年第8期56卷 211-223页

作者： wenjie liu Zhenyu Chen Jinsuo liu Zhaofeng Su Lianhua Chi Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science&TechnologyNanjing210044China School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China State Grid Electric Power Research Institute NARI Group CorporationNanjing210003China Centre for Quantum Software and Information Faculty of Engineering and Information TechnologyUniversity of Technology SydneyNSW2007Australia Department of Computer Science and Information Technology La Trobe UniversityVIC3086Australia

The delegating private quantum computation(DQC)protocol with the universal quantum gate set{X,Z,H,P,R,CNOT}was firstly proposed by Broadbent et al.[Broadbent(2015)],and then Tan et al.[Tan and Zhou(2017)]tried to put forward a half-blind DQC protocol(HDQC)with another universal set{H,P,CNOT,T}.However,the decryption circuit of Toffoli gate(i.e.T)is a little redundant,and Tan et al.’s protocol[Tan and Zhou(2017)]exists the information *** addition,both of these two protocols just focus on the blindness of data(*** client’s input and output),but do not consider the blindness of computation(*** delegated quantum operation).For solving these problems,we propose a full-blind DQC protocol(FDQC)with quantum gate set{H,P,CNOT,T},where the desirable delegated quantum operation,one of{H,P,CNOT,T},is replaced by a fixed sequence(H,P,CZ,CNOT,T)to make the computation blind,and the decryption circuit of Toffoli gate is also *** shows that our protocol can not only correctly perform any delegated quantum computation,but also holds the characteristics of data blindness and computation blindness.

关键词： Delegating private quantum computation universal quantum gate set full-blind Toffoli gate circuit optimization

Analysis and Improvement of Steganography Protocol Based on Bell States in Noise Environment

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Computers, Materials & Continua 2019年第5期59卷 607-624页

作者： Zhiguo Qu Shengyao Wu wenjie liu Xiaojun Wang Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and TechnologyNanjing210044China School of Computer&Software Nanjing University of Information Science and TechnologyNanjing210044China School of Electronic Engineering Dublin City UniversityDublinIreland

In the field of quantum communication,quantum steganography is an important branch of quantum information *** a realistic quantum communication system,quantum noises are unavoidable and will seriously impact the safety and reliability of the quantum steganographic ***,it is very important to analyze the influence of noise on the quantum steganography protocol and how to reduce the effect of *** paper takes the quantum steganography protocol proposed in 2010 as an example to analyze the effects of noises on information qubits and secret message qubits in the four primary quantum noise *** results show that when the noise factor of one quantum channel noise is known,the size of the noise factor of the other quantum channel can be adjusted accordingly,such as artificially applying noise,so that the influence of noises on the protocol is *** addition,this paper also proposes a method of improving the efficiency of the steganographic protocol in a noisy environment.

关键词： Quantum steganography quantum noise noise channel fidelity efficiency

Effect of Co element on microstructure and mechanical properties of FeCo_x NiCuAl alloys

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Acta Metallurgica Sinica(English Letters) 2012年第2期25卷 124-130页

作者： Yanxin ZHUANG wenjie liu Pengfei XING Fei WANG Jicheng HE Key Laboratory of Electromagnetic Processing of Materials （Ministry of Education） Northeastern University Shenyang 110819 China School of-Materials and Metallurgy Northeastern University Shenyang 110819 China

FeCoxNiCuAl （x values in molar ratio, x=0.2, 0.5, 1, 1.5, 2 and 3） alloys were pre- pared using a suck-casting method. The effect of Co element on phase constituents, microstructure and mechanical properties of the FeCox NiCuA1 alloys was investigated using X-ray diffraction, scanning electron microscopy, optical microscopy and com- pressive tests. It was found that the Co addition has a significant influence on the structure and properties of the FeCo^NiCuA1 alloys. The alloys have typical den- drite microstructure, and are composed of a simple fcc structure and bcc structure. The addition of Co promotes the formation of fcc phase in the alloys, retards the compressive strength and hardness of the alloys, and enhances the plasticity of the alloys.

关键词： High entropy alloy Co element Microstructure Properties

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A fast arc fault detection method for AC solid state power controllers in MEA

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Chinese Journal of Aeronautics 2018年第5期31卷 1119-1129页

作者： Weilin LI Kun HE wenjie liu Xiaobin ZHANG Yanjun DONG School of Automation Department of Electrical Engineering Northwestern Polytechnical University 710072 Xi'an China The Key Laboratory of Aircraft Electrie Propulsion Technology Ministry of Industry and Information Technology of China710072 Xi'an China

Arc fault detection is desperately required in Solid State Power Controllers（SSPC） in addition to their fundamental functions because arcs will provoke growing harm and threat to aircraft safety. Experimental study has been done to obtain the faulted current data. In order to improve the detection speed and accuracy, two fast arc fault detection methods have been proposed in this paper with the analysis of only half cycle data. Both Fast Fourier Transform（FFT） and Wavelet Packets Decomposition（WPD） have been adopted to distinguish arc fault currents from normal operation currents. Analysis results show that Alternating Current（AC） arcs can be effectively and accurately detected with the proposed half cycle data based methods. Moreover,experimental verification results have also been provided.

关键词： Arc fault detection Experimental verification Half cycle data analysis More electric aircraft Solid state power controller

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