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Particle Measurement Sensor for in situ determination of phase structure of fluidized bed

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Particuology 2009年第3期7卷 175-182页

作者： qiang Zhang Cang Huang Dong Jiang Xiaobo wei Zhen Qian Fei wei Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 China

Based on three-dimensional （3D） acceleration sensing, an intelligent particle spy capable of detecting, transferring, and storing data, is proposed under the name of Particle Measurement Sensor （PMS）. A prototype 60-mm-dia PMS was tested to track its freefall in terms of velocity and displacement, and served as a particle spy in a fluidized bed delivering the in situ acceleration information it detects. With increasing superficial gas velocity in the fluidized bed, the acceleration felt by PMS was observed to increase. The variance of the signals, which reflect the fluctuation, increased at first, reaching a maximum at the gas velocity （Uc） which marks the transition from bubbling to turbulent fluidization. Through probability density distribution （PDD） analysis, the PDD peak can be divided into the emulsion phase peak and the bubble phase peak. The average acceleration of emulsion and bubble phase increased, while the variance of both phases reached a maximum at Uc, at the same time. However, the difference between the variances of two phases reached the maximum at Uc. Findings of this study indicate that PMS can record independent in situ information. Further, it can provide other in situ measurements when equipped with additional multi-functional sensors.

关键词： Particle Measurement Sensor Fluidized bed Acceleration Gas-solid two-phase flow Phase structure

Progress of Materials Science in Space Technology in China(2020-2022)

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空间科学学报 2022年第4期42卷 812-823页

作者： wei qiang LIU Yue XIA Chaoqun Key Laboratory of Hebei Province on Scale-span Intelligent Equipment Technology School of Materials Mechanical EngineeringHebei University of TechnologyTianjin300401 State Key Laboratory of Reliability and Intelligence Electrical Equipment Hebei University of TechnologyTianjin300401 School of Materials Science and Engineering Hebei University of TechnologyTianjin300130

In this paper,the main research work and related reports of materials science research in China’s space technology field during 2020-2022 are *** paper covers Materials Sciences in Space Environment,Materials Sciences for Space Environment,Materials Behavior in Space Environment and Space experimental hardware for material *** the rapid development of China’s space industry,more scientists will be involved in materials science,space technology and earth science *** the future,a series of disciplines such as space science,machinery,artificial intelligence,digital twin and big data will be further integrated with materials science,and space materials will also usher in new development opportunities.

关键词： Materials sciences in space environment Materials sciences for space environment Materials behavior in space environment Space experimental hardware for material investigation

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铝灰资源化制备混凝剂研究进展

土木与环境工程学报（中英文） 2025年第1期47卷 205-212页

作者：郑怀礼张威震刘霜孙强江欣承丁魏重庆大学环境与生态学院重庆400045

二次资源的有效利用和环境污染的防治逐渐成为关注焦点。作为一种潜在的二次资源,铝灰具有丰富的储量和利用潜力,其资源化利用备受关注。制备水处理混凝剂,不仅有利于节约资源、降低成本,还能有效解决铝灰无害处理的难题。总结利用铝灰... 详细信息

二次资源的有效利用和环境污染的防治逐渐成为关注焦点。作为一种潜在的二次资源,铝灰具有丰富的储量和利用潜力,其资源化利用备受关注。制备水处理混凝剂,不仅有利于节约资源、降低成本,还能有效解决铝灰无害处理的难题。总结利用铝灰制备铝系混凝剂的重要原料(铝酸钙)以及5种铝灰基混凝剂(硫酸铝、聚硫酸铝、聚硫氯化铝、聚硫酸铝铁和聚氯化铝)的特点、制备方法和研究进展,分析了铝灰基混凝剂生产的经济效益。发现铝灰基混凝剂的规模化应用仍面临一些挑战,需从提高产品核心竞争力和填补相关政策的空白入手,以实现水处理行业和铝工业的高质量、绿色和可持续发展,并带来显著的经济和环境效益。

关键词：混凝剂铝灰聚氯化铝铝酸钙资源化利用

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Flashover in Back-Triggered Photoconductive Semiconductor Switch

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Chinese Physics Letters 2011年第1期28卷 106-108页

作者： SHI wei JIA Ji-qiang JI wei-Li GUI Huai-Meng Applied Physics Department Xi'an University of Technology Xi'an 710048 State Key Laboratory of Electrical Insulation for Power Equipment Xi'an Jiaotong University Xi'an 710049

Design of a new type of photoconductive semiconductor switches （PCSSs） is presented, and the withstand voltage is improved. The ttashover voltage of the back-triggered PCSS is found to be higher than that of the front-triggered one. By analyzing the differences of the flashover voltage between the back-triggered PCSS and the front-triggered PCSS, a detailed statistics analysis and theoretical explanation are expounded. The experiments also prove that the PCSS we developed could resist a voltage as high as 20 k V under the repetition frequency of 30 Hz.

关键词： Electronics and devices Optics, quantum optics and lasers

Transcriptional repression by androgen receptor: roles in castration-resistant prostate cancer

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Asian Journal of Andrology 2019年第3期21卷 215-223页

作者： Galina Gritsina wei-qiang Gao Jindan Yu Division of Hematology/Oncology Department of Medicine Northwestern University Feinberg School of Medicine Chicago IL 60611 USA Med-X Research Institute and School of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200030 China Department of Biochemistry and Molecular Genetics Northwestern University Feinberg School of Medicine Chicago IL 60611 USA Robert H. Lurie Comprehensive Cancer Center Northwestern University Chicago IL 60611 USA

Androgen receptor (AR), a hormonal transcription factor, plays important roles during prostate cancer progression and is a key target for therapeutic interventions. While androgen-deprivation therapies are initially successful in regressing prostate tumors, the disease ultimately comes back as castration-resistant prostate cancer (CRPC) or at the late stage as neuroendocrine prostate cancer (NEPC). CRPC remains largely dependent on hyperactive AR signaling in the milieu of low androgen, while NEPC is negative of AR expression but positive of many AR-repressed genes. Recent technological advances in genome-wide analysis of transcription factor binding sites have revealed an unprecedented set of AR target genes. In addition to its well-known function in activating gene expression, AR is increasingly known to also act as a transcriptional repressor. Here, we review the molecular mechanisms by which AR represses gene expression. We also summarize AR-repressed genes that are aberrantly upregulated in CRPC and NEPC and represent promising targets for therapeutic intervention.

关键词： androgen receptor CRPC EZH2 histone modifications NEPC targeted therapy transcriptional repressor

A Survey on 3D Visual Tracking of Multicopters

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International Journal of Automation and computing 2019年第6期16卷 707-719页

作者： qiang Fu Xiang-Yang Chen wei He School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China

Three-dimensional(3 D) visual tracking of a multicopter(where the camera is fixed while the multicopter is moving) means continuously recovering the six-degree-of-freedom pose of the multicopter relative to the camera. It can be used in many applications,such as precision terminal guidance and control algorithm validation for multicopters. However, it is difficult for many researchers to build a 3 D visual tracking system for multicopters(VTSMs) by using cheap and off-the-shelf cameras. This paper firstly gives an overview of the three key technologies of a 3 D VTSMs: multi-camera placement, multi-camera calibration and pose estimation for multicopters. Then, some representative 3 D visual tracking systems for multicopters are introduced. Finally, the future development of the 3D VTSMs is analyzed and summarized.

关键词： Multicopter three-dimensional(3D)visual tracking camera placement camera calibration pose estimation

Theory and applications of artificial endocrine system-an overview

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哈尔滨工程大学学报 2006年第B07期27卷 340-345页

作者： CUI wei qiang Sheng GAO X Z Department of Control Science and Engineering Harbin Institute of Technology Harbin 150001 China PLA corps 66455 Institute of Intelligent Power Electronics Helsinki University of Technology Espoo Finland

Inspired by the biological endocrine system, the Artificial Endocrine System (AES) has been proposed and investigated during the past decade. As a novel branch of computational intelligence methods, it has its unique and distinguishing features. This paper intends to give an overview of the current research work in the AES. The preliminary theory of the AES, which is based on the simplified mathematic models of natural endocrine system, is first introduced here. Some typical AES algorithms and their applications are also briefly discussed. Finally, a few remarks and conclusions are made.

关键词：人工内分泌系统激素机器人技术智能计算

CLIMATIC FEATURES OF SUMMER TEMPERATURE IN NORTHEAST CHINA UNDER WARMING BACKGROUND

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Chinese Geographical Science 2005年第4期15卷 337-342页

作者： LI Ji GONG qiang ZHAO Lian-wei Shenyang Institute of Atmospheric Environment China Meteorological Administration Shenyang 110016 P. R. China Institute of Meteorological Energy Exploitation and Application Shenyang 110016 P. R. China Liaoning Provincial Meteorological Observatory Liaoning Meterological Bureau Shenyang 110016 P. R. China

By using,summer temperature data in 26 stations from 1951 to 2003, the variation characteristics of summer temperature in Northeast China （NET） were analyzed based on the background of climate wanning. The results showed that the warming in summer was 0.15~C/10a in Northeast China, which was higher than that on the global, Northern Hemisphere or Northeast Asia scale in the recent 50 years. The responses of NET to global warming were shown in 3 aspects mainly. Firstly, it became warm and the average temperature increased in summer; secondly, the temperature variability increased, which displayed the increase of climatic instability; thirdly, the disaster of low temperature decreased and high temperature damage increased obviously, but the disaster of low temperature still existed in some areas under global warming background, which would be worthy of notice further.

关键词： Northeast China summer temperature climate features global warming disaster of low temperature

Seismic hazard prediction using multispectral amplification maps in a complex topographic area: A case study of Qiaozhuang town, Sichuan Province, Southwest China

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Journal of Mountain Science 2022年第3期19卷 726-739页

作者： LUO Yong-hong XU qiang ZHAN wei-wei GRELLE Gerardo State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection Chengdu University of TechnologyChengdu 610059China Department of Civil and Environmental Engineering Tufts UniversityMedfordMA 02155USA Department of Civil and Environment Engineering University of RomeRome 00184Italy

Earthquakes can cause widely distributed slope failures and damage in mountainous *** accurate prediction of ground motions in mountainous areas is essential for managing the seismic risk of urban cities near mountains but is restricted primarily by complex seismic site amplification effects in areas of uneven *** study selected Qiaozhuang town located in the Qingchuan–Pingwu fault zone,Southwest China,as a case study.A simulator for mapped seismic responses using a hybrid model(Si Se RHMap)was applied to compute the multispectral seismic topographic amplification maps at the three slope units surrounding Qiaozhuang town(weigan hill,***,and ***).Post-earthquake damage survey maps,1 D seismic site response spectral ratios,and H/V spectral ratios of earthquake data were used to validate the computed seismic site amplification factors and resonance *** results suggest that strong topographic amplification effects usually occur at distinct slope locations,such as hilltops,convex slope positions,upslope,and narrow *** computed topographic amplification factors in the study area reached up to 2.4 at upslope or hilltops,and the resonance frequencies were between 3 and 10 *** effects can be as important as stratigraphic effects when assessing seismic amplification effects in the study *** conclude that both topographic and stratigraphic effects should be considered in the comprehensive seismic hazard assessment of the study area or other similar mountain towns.

关键词： Seismic hazard prediction Multispectral amplification map topographic effects Stratigraphic effects SiSeRHMap Wenchuan earthquake