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Journal of Materials Science & Technology 2022年第26期121卷 28-39页

作者： guorong wang Yongkang Quan Kaicheng Yang Zhiliang Jin School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

The charge separation efficiency is one of the main factors affecting the solar photocatalytic decomposition of water to produce *** a unique heterojunction can accelerate the separation and transfer of photo-generated charges,and effectively improve the photocatalytic efficiency,which is considered a potential ***,the 2%Cu_(2)S/CZS step-scheme(S-scheme)heterojunction based on morphology and electronic structure was successfully prepared via simple hydrothermal *** with the monomer Cu_(2)S and Cd Zn S,the hydrogen evolution rate of 2%Cu_(2)S/CZS samples is significantly *** particular,the 2%Cu_(2)S/CZS not only shows high hydrogen evolution rate of 5904μmol g^(-1)h^(-1)(3.19 times than original Cd Zn S),but also presents preferable cyclic *** to the characterization,we believe that the introduction of Cu_(2)S has the following three advantages:(i)The snowflake structure of Cu_(2)S reduces the agglomeration of granular Cd Zn S.(ii)The Cu_(2)S with narrow band gap broadens the light response range of the composite catalyst.(iii)The Cu_(2)S was introduced into Cd Zn S to form S-scheme heterojunction,which accelerated the separation and transfer of photo-generated *** work broadens the idea of designing efficient photocatalyst of hydrogen evolution.

关键词： S-scheme Heterojunction Multifunctional Snowflake-Cu_(2)S Photocatalyst

Design of Robot Welding Seam Tracking System with Structured Light Vision

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Chinese Journal of Mechanical Engineering 2010年第4期23卷 436-442页

作者： LIU Suyi wang guorong ZHANG Hua JIA Jianping Provincial Key Lab of Robot and Weld Automation Nanchang University Nanchang 330031 China School of Mechanical andAutomotive Engineering South China University of Technology Guangzhou 510640 China

Robot welding is an important developing direction of welding automation and intelligentization, and automatic seam tracking technology is one of principal research domains. Nowadays, seam tracking system with structured light vision becomes a hot research. Structured light vision seam tracking products abroad are generally very expensive and can only be applied on special occasions. In China, the research of structured light vision seam tracking system is still just on the stage of experiments. A robot real-time seam tracking system with line structured light vision is designed. The hardware system is set up, a filtering method for line structure seam image is improved, and compared with common filtering, it has better effect and characteristic of real time. Two methods, fast template matching and fast Hough transform, to recognize the image coordinates of seam center are improved. Two new image recognition methods, structure element matching and comer detecting, are proposed. The comparison of seam image recognition shows that fast template matching and comer detecting are more precise and stable than the other two methods, and comer detecting is the best in real time. A simultaneous calibration for camera parameters and robot hand-eye is also proposed, and calculation shows that the calibration is effective and feasible. The robot seam tracking tests for linear and folded lap-joint are performed, which are based on the above four image recognition methods, and the results indicate that four image recognition methods are all applicable to real-time seam tracking, and the whole system sufficed for the requirements of real-time seam tracking. Automatic seam tracking with line structured light vision is feasible and has good versatility.

关键词： laser vision robot seam tracking image recognition

A New X-band Weather Radar System with Distributed Phased-Array Front-ends: Development and Preliminary Observation Results

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Advances in Atmospheric Sciences 2022年第3期39卷 386-402页

作者： Xiaoqiong ZHEN Shuqing MA Hongbin CHEN guorong wang Xiaoping XU Siteng LI Meteorological Observation Center of China Meteorological Administration Beijing 100081China College of Electronic Engineering Chengdu University of Information TechnologyChengdu 610225China Institute of Atmospheric Physics China Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences(CEPS) University of Chinese Academy of Sciences(UCAS)Beijing 100049China Eastone Washon Science and Technology Ltd. Changsha 410000China Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China

A novel weather radar system with distributed phased-array front-ends was developed. The specifications and preliminary data synthesis of this system are presented, which comprises one back-end and three or more front-ends. Each front-end, which utilizes a phased-array digital beamforming technology, sequentially transmits four 22.5°-width beams to cover the 0°–90° elevational scan within about 0.05 s. The azimuthal detection is completed by one mechanical scan of0°–360° azimuths within about 12 s volume-scan update time. In the case of three front-ends, they are deployed according to an acute triangle to form a fine detection area(FDA). Because of the triangular deployment of multiple phased-array front-ends and a unique synchronized azimuthal scanning(SAS) rule, this new radar system is named Array Weather Radar(AWR). The back-end controls the front-ends to scan strictly in accordance with the SAS rule that assures the data time differences(DTD) among the three front-ends are less than 2 s for the same detection point in the FDA. The SAS can maintain DTD < 2 s for an expanded seven-front-end AWR. With the smallest DTD, gridded wind fields are derived from AWR data, by sampling of the interpolated grid, onto a rectangular grid of 100 m ×100 m ×100 m at a 12 s temporal resolution in the FDA. The first X-band single-polarized three-front-end AWR was deployed in field experiments in 2018 at Huanghua International Airport, China. Having completed the data synthesis and processing, the preliminary observation results of the first AWR are described herein.

关键词： phased-array weather radar multiple radar front-ends synchronized azimuthal scanning(SAS) data time differences(DTD) wind fields

Tribological properties of oil-impregnated polyimide in double-contact friction under micro-oil lubrication conditions

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Friction 2023年第8期11卷 1493-1504页

作者： Jinbang LI Jinyang LIU Kai LI Ningning ZHOU Yang LIU Xudong HU Shunli YIN guorong wang School of Mechanical Engineering&Mechanics Ningbo UniversityNingbo 315211China Healthy&Intelligent Kitchen Engineering Research Center of Zhejiang Province Ningbo 315211China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100029China Key Laboratory of Impact and Safety Engineering Ministry of EducationNingbo UniversityNingbo 315211China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

Oil-impregnated porous polyimide(iPPI)materials are usually used as retainer for *** these bearings,balls and rings,balls and retainers are two different kinds of *** this paper,the friction and wear properties of iPPI were investigated using steel(disc)–steel(ball)–iPPI(pin)double-contact friction test rig for simulating the actual contact in *** results show that compared with that of iPPI–steel single contact,the friction coefficient of iPPI–steel in double contacts is lower and decreases with the amount of additional *** surface of iPPI in single contact suffers more wear compared with that in double *** from single contact,the worn surfaces of iPPI in double contacts are *** Raman spectra of worn surfaces of balls and discs indicate thatα-Fe_(2)O_(3) and Fe_(3)O_(4) were formed during rubbing of the double *** nanoscale iron oxide particles are found on the worn surfaces of iPPI in double contacts;on the contrary,few particles could be found on the surface in single *** double-contact friction,the nanoscale wear debris penetrates inside the iPPI material through the process of extruding and recycling of oil,which is the mechanism of the blackening of the iPPI worn *** studies show that the double-contact friction method is a new and effective method to study the friction in bearings,especially for those with polymer retainer.

关键词： porous polyimide(PPI) oil-impregnated material double-contact friction micro-oil lubrication

Water environment protection and sustainable development in townlet of China: A case study in Taicang

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Journal of Environmental Sciences 2021年第12期33卷 129-139页

作者： Wenli Zhou Mengmeng Liu Xu Shang Meixue Chen guorong wang Hui Zhong Junya Zhang Yuansong Wei Yan Yan Min Yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Laboratory of Water Pollution Control Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Suzhou Water Supplies Bureau Suzhou 215011China

The Environmental Kuznets Curve(EKC) model was applied to investigate the relationship between economic growth and water environment quality based on panel data of Taicang during 2010–2017. The typical inversed-U shaped relationship has been obtained between GDP(gross domestic product) and indicators of ammonia, total nitrogen(TN) and total phosphorus(TP), respectively. The EKC turning point appeared when the GDP per capita was around US$2270, which was much lower than those in some developed countries(US$11,200). However, the decoupling between chemical oxygen demand(COD) and GDP per capita occurred even before this period, which should be attributed to the strict COD emission regulation being implemented since 2010. Further, analysis based on the Tapio decoupling coefficient elasticity model analyzed the ammonia nitrogen and economic development of each industry. We found that the agriculture no-point was strong decoupling in 2011–2014, then came to Recessive decoupling. The domestic wastewater had been in a strong decoupling state;Both urban non-point and industry experienced expansive negative decoupling, due to strict policy that prioritizes the environment over development and the investment in improvement of environment and techniques, both of them gradually came to strong decoupling. The result demonstrated that the EKC turning point could be appear in earlier economic stage and the decoupling coefficient elasticity could be improved through taking strong regulation measures.

关键词： Sustainable urbanization Water environment Taicang EKC Tapio decoupling

CT Texture Analysis: A Potential Biomarker for Evaluating KRAS Mutational Status in Colorectal Cancer

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Chinese Medical Sciences Journal 2020年第4期35卷 306-314页

作者： Jian Cao guorong wang Zhiwei wang Zhengyu Jin Department of Radiology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Objective Texture analysis is deemed to reflect intratumor heterogeneity invisible to the naked *** aim of this study was to evaluate the feasibility of assessing the KRAS mutational status in colorectal cancer(CRC)patients using CT texture *** This retrospective study included 92 patients who had histopathologically confirmed CRC and underwent preoperative contrast-enhanced CT *** patients were assigned into a training cohort(n=51)and a validation cohort(n=41).We placed the region of interest in the tumour regions on the selected axial images using software of lexRad to extract a series of quantitative parameters based on the spatial scaling factors(SSFs),including mean,standard deviation(SD),entropy,mean of positive pixels(MPP),skewness,and *** texture parameters and clinical characteristics(age,gender,tumour location,histopathology;tumour size,1 N,M stages)were compared between the mutated and wild-type KRAS patient groups in training cohort and validation *** building the multiple feature classifier,we calculated the correlations of the features using Pearsons correlation coefficient,and if any two features were significantly correlated,the one with lower AUC was ***,only the most discriminative isolated features were combined to train a supporting vector machine(SVM)*** receiver operating characteristic(ROC)curve was processed for evaluating the diagnostic efficiency of texture parameters in differentiating CRC patients with mutated KRAS from those with wild-type *** None of the clinical characteristics were significant different between CRC patients with wild-type KRAS and mutated KRAS in both *** predicting the expression of mutated KRAS in CRC patients,the perfect model which combined skewness on SSF 5 by unenhanced CT,entropy on SSF 2,skewness and kurtosis on SSF 0,and kurtosis and mean on SSF 3 by enhanced CT,showed a desirable AUC of 0.951(95%CI:0.895-1,P<0.001),w

关键词： biological markers colorectal neoplasms texture analysis computed tomography

Research on Lubrication Model of Rock Bit Bearings with Non-Newtonian Medium

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Modern Mechanical Engineering 2012年第1期2卷 1-5页

作者： guorong wang wang Juan Lin Zhong Southwest Petroleum University Chengdu China

Lubrication media of rock bit journal bearing is non-Newtonian fluid, and because of structure limitations, lubricant supply is only from the inside track and its rheological properties are relatively complex. In general studies, the non- Newtonianism of lubrication media of rock bit journal bearing is neglected to simplify the research process. Based on the universal Reynolds equation of non-Newton media, the mathematical model of lubrication analysis was suitable for the rock bit bearing working conditions was established. Then according to the experimental results of rheological properties of RB-type lubricating grease, the equivalent viscosity of the model was established and this model can be solved by the method used in solving the Reynolds equation of Newton fluid.

关键词： Journal Bearing Rock Bit Lubrication Model RB Grease

固态流化法射流下的破碎颗粒运移规律的数值模拟

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中国造船 2019年第4期60卷 108-114页

作者：杨浦王国荣西南石油大学机电工程学院成都610500

为了探究非成岩天然气水合物在用固态流化法射流采掘过程中固相回收率的影响因素,依据液固两相流理论,基于DPM模型对水平采空区多相流场内固相颗粒在射流激励条件下的运移规律进行数值模拟。重点研究不同射流破碎边界和抽吸孔位置对固... 详细信息

为了探究非成岩天然气水合物在用固态流化法射流采掘过程中固相回收率的影响因素,依据液固两相流理论,基于DPM模型对水平采空区多相流场内固相颗粒在射流激励条件下的运移规律进行数值模拟。重点研究不同射流破碎边界和抽吸孔位置对固相回收率的影响。研究结果表明,抽吸孔改变了孔前流场的方向并提高了局部流速,有利于固相回收;射流破碎边界影响颗粒运移方向和速度衰减规律,决定了最佳抽吸孔位置。研究射流破碎边界和抽吸孔的最佳组合是一种提高固相回收率的有效方法。

关键词：固态流化:射流采掘颗粒运移数值模拟

A MATRIX EQUATION FROM AN INVERSE PROBLEM OF VIBRATION THEORY

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Applied Mathematics(A Journal of Chinese Universities) 2003年第1期18卷 77-82页

作者： WuZhuzhu wangguorong Dept.ofComputer ShaoguanUniv.GuangdongShaoguan512005China CollegeofMath.Sciences ShanghaiNormalUniv.Shanghai200234China

The symmetric,positive semidefinite,and positive definite real solutions of the matrix equation XA=YAD from an inverse problem of vibration theory are *** D=T the necessary and sufficient conditions for the existe... 详细信息

关键词： matrix equation symmetric matrix positive semidefinite matrix positive definite matrix generalized inverse matrix.

入口数量对旋流器分离天然气水合物浆体流场特性和分离性能的影响

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中国造船 2019年第4期60卷 161-169页

作者：王党飞王国荣钟林邱顺佐西南石油大学机电工程学院成都610500 西南石油大学油气藏地质及开发工程国家重点实验室成都610500

用计算流体力学(CFD)方法对单入口、双入口和四入口旋流器进行数值模拟,分析这3种入口形式对旋流器的流场特性、湍动能、锥段切向速度以及分离性能的影响。计算结果表明,单入口旋流器的流场和湍动能具有不对称性,对旋流场产生强烈扰动,... 详细信息

用计算流体力学(CFD)方法对单入口、双入口和四入口旋流器进行数值模拟,分析这3种入口形式对旋流器的流场特性、湍动能、锥段切向速度以及分离性能的影响。计算结果表明,单入口旋流器的流场和湍动能具有不对称性,对旋流场产生强烈扰动,导致流场的稳定性降低,而双入口、四入口旋流器的流场具有良好的对称性和稳定性;双入口、四入口旋流器的锥段切向速度较大,有利于实现分离;在研究范围内,随着流速的增大,单入口旋流器砂分离效率先增大后减小,而双入口、四入口旋流器则持续增大,3种入口形式旋流器的水合物分离效率和压力降均随流速增大而增大;采用双入口形式更能保持流场稳定、提高分离性能、增大旋流器处理能力。研究工作对于旋流器在海洋天然气水合物开采的现场应用具有一定的指导意义。

关键词：旋流器流场特性分离性能天然气水合物