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STOCHASTIC APPROXIMATION IN REAL TIME:A PIPE LINE APPROACH

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Journal of Computational Mathematics 1994年第1期12卷 21-30页

作者： zhu, YM yiN, G ACAD SINICA CHENGDU BRANCHINST MATH SCICHENGDUPEOPLES R CHINA WAYNE STATE UNIV DEPT MATHDETROITMI 48202

new approach for stochastic approximation in real time is developed. A number of processors are simultaneously active to carry out a computing task. All processors work on the same system with different starting time. After each iteration, computed data are passed to the next processor on line. Interacting tasks and iterative instructions are carried through pipelining of computation and communication. Asymptotic properties of the algorithm are developed, and comparisons of the performance between the new algorithm and the classical one are made.

关键词： stochastic REAL Berlin communicating deterministic Approximation Monro assume Cambridge paral

Steric-switched defluorofunctionalization selectivity: controlled synthesis of monofluoroalkene-masked medium-sized heterocyclic lactams and lactones

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Science China Chemistry 2022年第3期65卷 554-562页

作者： Hao Zeng Hengyuan Li Huanfeng Jiang Chuanle zhu School of Chemistry and Chemical Engineering Key Lab of Functional Molecular Engineering of Guangdong ProvinceSouth China University of TechnologyGuangzhou 510640China

The steric-switched ipso-defluoroamination-triggered and ipso-defluorooxylation-triggered cyclization of(trifluoromethyl)alkenes with amino alcohols and diamines are achieved under mild conditions. This regioselective strategy distinguishes the different nucleophilic heteroatom sites in amino alcohols and unsymmetric diamines by the sequential defluorinative functionalization of two C(sp^(3))–F bonds in a CF_(3) group. Various attractive monofluoroalkene-masked medium-sized heterocyclic lactams and lactones are obtained in moderate to excellent yields. Simple derivation of these masked-heterocycles efficiently affords useful skeletons of lactams, lactones, and 1,4-oxazepanes in a single diastereoisomer. Mechanism studies indicate that a unique sequential ipso-/γ-selective defluorinative functionalization pathway is involved in these transformations.

关键词： switched-selectivity C–F bond cleavage medium-sized heterocycle lactam lactone

Artificial intelligence-motivated in-situ imaging for visualization investigation of submicron particles deposition in electric-flow coupled fields

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Chinese Journal of Chemical Engineering 2024年第10期74卷 13-21页

作者： Shanlong Tao Xiaoyong Yang Wei yin Yong zhu School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Research Center for Combustion and Environmental Technology School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

This study delves into the intricate deposition dynamics of submicron particles within electric-flow coupled fields,underscoring the unique challenges posed by their minuscule size,aggregation tendencies,and biological *** an operando investigation system that synergizes microfluidic technology with advanced micro-visualization techniques within a lab-on-a-chip framework enables a meticulous examination of the dynamic deposition *** incorporation of object detection and deep learning methodologies in image processing streamlines the automatic identification and swift extraction of crucial data,effectively tackling the complexities associated with capturing and mitigating these hazardous *** with the analysis of the growth behavior of particle chain under different applied voltages,it established that a linear relationship exists between the applied voltage and θ.And there is a negative correlation between the average particle chain length and electric field strength at the collection electrode surface(4.2×10^(5)to 1.6×10^(6)V·m^(-1)).The morphology of the deposited particle agglomerate at different electric field strengths is proposed:dendritic agglomerate,long chain agglomerate,and short chain agglomerate.

关键词： Artificial intelligence In-situ imaging Submicron particles Lab-on-a-chip Deposition

Seismic effects on reinforcement load and lateral deformation of geosynthetic-reinforced soil walls

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Frontiers of Structural and Civil Engineering 2021年第4期15卷 1001-1015页

作者： Fei ZHANG Yuming zhu Yanbo CHEN Shangchuan YANG Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China Jiangsu Province’s Geotechnical Research Center Nanjing210098China Southwest Jiaotong University Key Laboratory of High-speed Railway Engineering of the Ministry of EducationChengdu610031China

Current design methods for the internal stability of geosynthetic-reinforced soil(GRS)walls postulate seismic forces as inertial forces,leading to pseudo-static analyses based on active earth pressure theory,which yields unconservative reinforcement loads required for seismic *** seismic analyses are limited to the determination of maximum reinforcement *** study aimed to calculate the distribution of the reinforcement load and connection strength required for each layer of the seismic GRS *** the top-down procedure involves all of the possible failure surfaces for the seismic analyses of the GRS wall and then obtains the reinforcement load distribution for the limit *** distributions are used to determine the required connection strength and to approximately assess the facing lateral *** sufficient pullout resistance to be provided by each reinforcement,the maximum required tensile resistance is identical to the results based on the Mononobe-Okabe ***,short reinforcement results in greater tensile resistances in the mid and lower layers as evinced by compound failure frequently occurring in GRS walls during an *** studies involving backfill friction angle,reinforcement length,vertical seismic acceleration,and secondary reinforcement are conducted to investigate seismic impacts on the stability and lateral deformation of GRS walls.

关键词： geosynthetics reinforced soil retaining walls seismic performance

Relay Selection Scheme for AF System with Partial CSI and Optimal Stopping Theory

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Tsinghua Science and Technology 2020年第2期25卷 302-312页

作者： Rui zhu Tao Li Jianxin Guo Yangchao Huang School of Information Engineering Xijing InstituteXi’an 710123China Institute of Information and Navigation Air Force Engineering UniversityXi’an 710008China Beijing Institute of Information Engineering Beijing 100085China Institute of Information and Navigation Air Force Engineering UniversityXi'an 710008China

Relay selection for Relay Assisted(RA)networks is an economical and effective method to improve the spectrum *** selection performs especially well when the source node has accurate and timely Channel State Information(CSI).However,since perfect CSI knowledge is rarely available,research of relay selection with partial(statistical)CSI is of paramount *** this paper,relay selection for RA networks with statistical CSI is formulated as a Multiple-Decision(MD)***,the cost of obtaining the CSI is also considered in the formulated *** relay selection schemes,Maximal Selection Probability(MSP)and Maximal Spectrum Efficiency Expectation(MSEE),are proposed to solve the formulated MD problem under different optimal criteria assumptions based on the optimal stopping *** MSP scheme maximizes the probability that the Best Assisted Relay Candidate(BARC)can be selected,whereas the MSEE scheme provides the maximal expectation of the spectrum *** results show that the proposed schemes effectively improve the spectrum efficiency,and the MSEE scheme is more suitable for stable communication ***,the MSP scheme is more suitable for burst communication cases.

关键词： Relay-Assisted(RA)network relay selection optimal stopping

An analysis of an ethanol-based, whole-crop refinery system in China

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1609-1618页

作者： Zhiqiang Zhang Shanying Hu Dingjiang Chen Bing zhu Department of Chemical Engineering Tsinghua University

Bio-fuel can be used to help transition from a petroleum-based society to a bio-based society. Ever since the China Development and Reform Commission suspended the approval of crop processing programs, second-generation bio-ethanol research and industrialization processes have attracted significant attention. In 2020, bio-ethanol production is predicted to reach 10 million tons. Currently, there are a few domestic enterprises that have established different scaled pilot or demonstration bases for cellulosic ethanol, which reduce the cost of ethanol by continuously improving pretreatment and hydrolysis techniques. In the next three years, these enterprises will realize large-scale commercial production. Given the practical problems in cellulosic ethanol plant construction and operation(e.g., marketing price variation and difficulties in feedstock collection), this paper began with the concept of a "whole-crop refinery" and presented a solution to the integration of industry and agriculture as well as multi-crop refining. This paper then took the whole-crop refining system of corn as an example and presented an analysis of the logistics, energy flow, and economical efficiency of the system. The results demonstrated that the integrated system could properly reduce the required fixed investments in production equipment,shared utilities, and wastewater treatment facilities, as well as reduction of energy consumption. Although the proposed system has several problems, it brings the long-term goal of large-scale commercial application closer than ever.

关键词： Whole-crop refinery Cellulosic ethanol Biomass Corn stover

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关于荣辱观与社会风气的对话

毛泽东邓小平理论研究 2006年第4期 5-14页

作者：赵修义朱贻庭华东师范大学中国现代思想文化研究所华东师范大学哲学系

胡锦涛关于要在全社会树立社会主义荣辱观和良好风气的重要论述，在社会上引起了强烈的反响，也引起了学界的高度关注。目前的讨论集中在荣辱观上。

关键词：社会风气荣辱观对话社会主义胡锦涛论述

Experimental Study on Ultrasonic Cavitation Intensity Based on Fluorescence Analysis

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 196-204页

作者： Linzheng Ye Shida Chuai Xijing zhu Dong Wang Shanxi Key Laboratory of Advanced Manufacturing Technology School of Mechanical EngineeringNorth University of ChinaTaiyuan 030051China College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter EX44QFUK

The Ultrasonic cavitation effect has been widely used in mechanical engineering,chemical engineering,biomedicine,and many other *** quantitative characterization of ultrasonic cavitation intensity has always been a *** on this,a fluorescence analysis method has been adopted to explore ultrasonic cavitation intensity in this *** the experiment of fluorescence intensity measurement,terephthalic acid(TA)was used as the fluorescent probe,ultrasonic power,ultrasonic frequency,and irradiation time were independent variables,and fluorescence intensity and fluorescence peak area were used as experimental *** collapse of cavitation bubble will cause molecular bond breakage and release·OH,and the non-fluorescent substance TA will form the strong fluorescent substance TAOH with·*** spectra of the treated samples were measured by a F-7000 fluorescence *** results showed that the fluorescence intensity and fluorescence peak area increased rapidly after ultrasonic cavitation treatment,and then increased slowly with the increase of ultrasonic power,which gradually increased with the increase of irradiation *** first decreased and then increased with the increase of ultrasonic frequency from 20 kHz to 40 *** irradiation time was the most influential factor,and the cavitation intensity of low frequency was higher *** fluorescence intensity and fluorescence peak area of the samples increased by 2-20 times after ultrasonic treatment,which could increase from 69 and 5238 to 1387 and 95451,*** the irradiation time exceeded 25 min,the growth rate of fluorescence intensity slowed down,which was caused by the decrease of gas content and TA concentration in the *** study quantitatively characterized the cavitation intensity,reflecting the advantages of fluorescence analysis,and provided a basis for the further study of ultra-sonic cavitation.

关键词： Ultrasonic cavitation Cavitation intensity Fluorescence intensity Fluorescence peak area

Acupuncture and/or moxibustion for the treatment of lumbar disc herniation:quality assessment of systematic reviews

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Traditional Medicine Research 2020年第4期5卷 282-294页

作者： Zi-Han yin Chao-Xi zhu Gui-Xing Xu Cheng ying Ai-Ling Huang Ya-Nan Fu Jiao Chen Ling Zhao Fan-rong Liang Chengdu University of Traditional Chinese Medicine Chengdu 610075China

Objective:In the current systematic review on acupuncture and/or moxibustion for lumbar disc herniation(LDH),we evaluated the methodology and quality of evidence and reports to provide necessary information for accurate clinical decision-making regarding acupuncture and/or moxibustion for ***:From databases such as CBM(Chinese biomedical literature database),VIP(China science and technology journal database),CNKI(China national knowledge infrastructure),WF(Wanfang database),Web of Science,Embase,Medline,and Cochrane Library,systematic reviews on acupuncture and/or moxibustion for LDH were retrieved,and the methodological quality of the literature was evaluated according to the assessment of multiple systematic reviews(AMSTAR)***,the grading of recommendations assessment,development and evaluation(GRADE)system was used to grade the quality of evidence and the preferred reporting items for systematic reviews and meta-analyses(PRISMA)statement to evaluate the quality of the ***:A total of 18 systematic reviews were included,and the conclusion is that acupuncture and/or moxibustion have some advantages in terms of efficacy and safety with regard to LDH *** to the AMSTAR score,there were 4 high-quality studies,13 moderate-quality studies,and 1 low-quality *** showed that quality of evidence such as total effective rate of LDH and VAS was low and that of other forms of evidence was *** PRISMA statement showed that 8 articles were in line with 20 or more of the 27 items,and 10 articles were in line with 10-19 of the 27 ***:At present,acupuncture and/or moxibustion for LDH has a good curative *** importantly,its methodological quality was of moderate level and the report quality was generally good and relatively ***,the poor quality of the original research results was reflected in the quality of *** studies are needed to make sure whether acupuncture is more effective

关键词： Lumbar disc herniation Acupuncture therapy Overview of systematic reviews AMSTAR GRADE PRISMA.