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Fluid Mud Measurement and Siltation Analysis in A Trial Excavated Channel in the Approach Channel of the Xiangshan Port

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China Ocean Engineering 2020年第3期34卷 421-431页

作者： DING jian HU Guo-dong WANG Zhen-xiang SHI jian wu De-an Key Laboratory of Coastal Disasters and Defence Ministry of EducationHohai UniversityNanjing 210098China Yangtze River Estuary Investigation Bureau of Hydrology and Water Resource Shanghai 200136China

In order to clarify the distribution and variation of silt and fluid mud in the Waiganmen shallow section of the 50000-ton intake channel of the Xiangshan Port,and to understand the influence of the channel excavation on the surrounding flow conditions and the strength of the backsilting,especially the impact of typhoon on the sudden silting of the channel,so as to demonstrate the feasibility and stability of the channel *** fluid mud,hydraulic,sediment and topographic measurements were carried out in the study area,and the thickness of the fluid mud layers,tidal current,sediment and topographic data were ***-frequency sounder,gamma-ray densitometer and SILAS navigational fluid mud measurement system were used to monitor the fluid mud,and the results were compared and *** adaptability and accuracy of the three methods were *** SILAS navigational continuous density measurement system and gamma-ray fixed-point fluid mud measurement are used to detect the density,thickness and variation of the fluid mud *** on the hydrological observation data,the process of erosion and deposition in excavation channel and its influence mechanism are analyzed,and the distribution characteristics and evolution law of siltation in engineering area are given in the form of empirical *** research shows that the super typhoon can produce large siltation,which results in sudden siltation of the *** tidal current is the main dynamic factor of the change of erosion and siltation of the excavation *** the influence of reciprocating tidal current and excavation topography,the trial excavation trench is silted on the *** is fluid mud in the monitoring area of the trench,and the distribution of fluid mud is different in *** thickness of the fluid mud at the bottom of the trench is generally larger than that outside the trench and the slope of the trench,and the siltation of the trench tends to be *** re

关键词： excavation trench fluid mud backsilting measurement tidal current dynamic mechanism

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A Novel Hybrid Point Defect of Oxygen Vacancy and Phosphorus Doping in TiO_(2)Anode for High-Performance Sodium Ion Capacitor

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Nano-Micro Letters 2022年第10期14卷 1-14页

作者： Daming Chen Youchun wu Zhiquan Huang jian Chen School of Materials Science and Engineering Southeast UniversityNanjing 211189People’s Republic of China

Although sodium ion capacitors(SICs)are considered as one of the most promising electrochemical energy storage devices(organic electrolyte batteries,aqueous batteries and supercapacitor,etc.)due to the combined merits of battery and capacitor,the slow reaction kinetics and low specific capacity of anode materials are the main *** defects including vacancies and heteroatoms doping have been widely used to improve the kinetics behavior and capacity of anode ***,the interaction between vacancies and heteroatoms doping have been seldomly *** this study,a hybrid point defects(HPD)engineering has been proposed to synthesize TiO_(2) with both oxygen vacancies(OVs)and P-dopants(TiO_(2)/C-HPD).In comparison with sole OVs or P-doping treatments,the synergistic effects of HPD on its electrical conductivity and sodium storage performance have been clarified through the density func-tional theory calculation and sodium storage *** expected,the kinetics and electronic conductivity of TiO_(2)/C-HPD3 are significantly improved,resulting in excellent rate performance and outstanding cycle ***,the SICs assembled from TiO_(2)/C-HPD3 anode and nitrogen-doped porous carbon cathode show outstanding power/energy density,ultra-long life with good capacity *** work provides a novel point defect engineering perspective for the development of high-performance SICs electrode materials.

关键词： Defect engineering P-dopants Oxygen vacancy Conductivity Sodium ion capacitors

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Solving quantified constraint satisfaction problems with value selection rules

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Frontiers of Computer Science 2020年第5期14卷 153-163页

作者： jian Gao Jinyan Wang Kuixian wu Rong Chen College of Information Science and Technology Dalian Maritime UniversityDalian116026China Logistics Research Institute Dalian Maritime UniversityDalian116026China College of Computer Science and Information Engineering Guangxi Normal UniversityGuilin541004China

Solving a quantified constraint satisfaction problem(QCSP)is usually a hard task due to its computational *** algorithms play an important role in solving this problem,among which backtrack algorithms are *** a backtrack algorithm,an important step is assigning a variable by a chosen value when exploiting a branch,and thus a good value selection rule may speed up *** this paper,we propose two value selection rules for existentially and universally quantified variables,respectively,to avoid unnecessary *** rule for universally quantified variables is prior to trying failure values in previous branches,and the rule for existentially quantified variables selects the promising values *** rules are integrated into the state-of-the-art QCSP solver,i.e.,QCSP-Solve,which is an exact solver based on *** perform a number of experiments to evaluate improvements brought by our *** computational results,we can conclude that the new value selection rules speed up the solver by 5 times on average and 30 times at *** also show both rules perform well particularly on instances with existentially and universally quantified variables occurring alternatively.

关键词： quantified CSP backtracking value selection fail-first principle

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Medical Assessment on Forest Therapy Base in Zhejiang Province, China

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Biomedical and Environmental Sciences 2019年第12期32卷 934-937页

作者： wu Qing YE bing CHEN Zhuo Mei LYU Xiao Ling REN Xiao Xu DONG jian Hua WANG Guo Fu Geriatrics Institute of Zhejiang Province Zhejiang HospitalHangzhou 310013ZhejiangChina Hangzhou Forestry Academy Hangzhou 310022ZhejiangChina Chinese Academy of Forestry Beijing 100091China Zhejiang Forestry Academy Hangzhou 310023ZhejiangChina

According to the‘13^th Five-Year plan for forestry development’of State Forestry and Grassland Administration,500 forest therapy(also known as forest bathing or Shinrin-yoku in Japan)bases and 5–10 international cooperation demonstration bases will be set up in China,by ***,it’s important to provide evidence about the benefits of specific forest environmental to human health,namely medical assessment on forest therapy base.

关键词： forest bases Forest

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Speed and Accuracy Tradeoff for LiDAR Data Based Road Boundary Detection

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IEEE/CAA Journal of Automatica Sinica 2021年第6期8卷 1210-1220页

作者： Guojun Wang jian wu Rui He Bin Tian State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the Qingdao Academy of Intelligent Industries ShandongChina

Road boundary detection is essential for autonomous vehicle localization and decision-making,especially under GPS signal loss and lane *** road boundary detection in structural environments,obstacle occlusions and large road curvature are two significant ***,an effective and fast solution for these problems has remained *** solve these problems,a speed and accuracy tradeoff method for LiDAR-based road boundary detection in structured environments is *** proposed method consists of three main stages:1)a multi-feature based method is applied to extract feature points;2)a road-segmentation-line-based method is proposed for classifying left and right feature points;3)an iterative Gaussian Process Regression(GPR)is employed for filtering out false points and extracting boundary *** demonstrate the effectiveness of the proposed method,KITTI datasets is used for comprehensive experiments,and the performance of our approach is tested under different road *** experiments show the roadsegmentation-line-based method can classify left,and right feature points on structured curved roads,and the proposed iterative Gaussian Process Regression can extract road boundary points on varied road shapes and traffic ***,the proposed road boundary detection method can achieve real-time performance with an average of 70.5 ms per frame.

关键词： 3D-LiDAR autonomous vehicle object detection point cloud road boundary

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Source and distribution of mercury in natural gas of major petroliferous basins in China

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Science China Earth Sciences 2020年第5期63卷 643-648页

作者： Quanyou LIU Weilong PENG jian LI Xiaoqi wu State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China Research Institute of Petroleum Exploration and Production SINOPECBeijing 100083China Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China Research Center of Exploration and Development in Sichuan Basin Research Institute of Petroleum Exploration and ProductionSINOPECChengdu 610041China

Based on the analysis of the natural gas samples of 146 wells from four major petroliferous basins of China,the source and distribution of mercury in natural gas in major petroliferous basins of China were *** have shown that the mercury concentration of natural gas in petroliferous basins of China varies widely,ranging from 0.01 to 4050μg/m^*** gas well with the highest mercury concentration is in the Xushen gas field in the Songliao *** mercury concentration in the craton basin is relatively low,and the secondary gas reservoir in the Tarim Basin has the lowest mercury *** the rift basin,due to the presence of deep faults which cut the basement and mixing effects of deep fluids,the mercury concentration in natural gas may be abnormally high,*** Xushen gas field in the Songliao *** relatively stable basins where deep and large faults do not develop,mercury is primarily of organic *** rift basins where deep fluids are mixed with gas reservoirs,mercury in natural gas may mainly come from the deep fluids and is characterized by abnormally high mercury concentration and R/Ra values.

关键词： Natural gas Mercury concentration Petroliferous basin Xushen gas field Deep fluids

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Design and analysis of a scheme for the naval gun test shell entering the bore

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Defence Technology（防务技术） 2021年第4期17卷 1374-1386页

作者： Xin-yun Liu Da-lin wu jian Hou Shijiazhuang Campus Army Engineering UniversityShijiazhuang050003China Naval University of Engineering Wuhan430000China

The test shell without projectile belt is widely used in the teaching,inspection and maintenance of modern automatic naval *** order to ensure the normal work of each mechanism,it is very important to design the buffer and limit of the test shell during the process of entering the *** a certain type of medium caliber naval gun as the research object,the design of colloidal fluid damper and cartridge lock was proposed to ensure the reliability of entering the bore and closing the *** combining the simulation methods of computational fluid dynamics(CFD)and multibody system dynamic(MBD),it was analyzed whether the structural design can meet the engineering *** research results show that the colloidal fluid damper can dissipate a large amount of kinetic energy of the shell,and the cartridge lock can limit the rebound *** combination of the two ensures the smooth process of closing the *** research provides a design method for the process of the test shell entering the bore,and provides theoretical support for the feasibility of the method.

关键词： Naval gun Colloidal fluid damper Cartridge lock CFD MBD

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Detection of short stature homeobox 2 and RAS-associated domain family 1 subtype A DNA methylation in interventional pulmonology

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World Journal of Clinical Cases 2021年第20期9卷 5391-5397页

作者： jian wu Peng Li Department of Anesthesiology Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina Department of Pulmonary and Critical Care Medicine Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina

One of the most important aspects of interventional pulmonology is to obtain tissue or liquid samples of the chest to diagnose a respiratory disease;however,it is still possible to obtain insufficient tissue or cytologic ***,methylation detection is an effective method by which to establish a *** review focuses on the clinical application of short stature homeobox 2 and RAS-associated domain family 1 subtype A DNA methylation detection in interventional pulmonology,including bronchoscopic fluid biopsy,transbronchial needle aspiration,and pleural effusion.

关键词： DNA methylation Interventional pulmonology Short stature homeobox 2 RAS-associated domain family 1 subtype A Fluid biopsy Transbronchial needle aspiration

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A fast computational method for the landing footprints of space-to-ground vehicles

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Journal of Systems Engineering and Electronics 2020年第5期31卷 1062-1076页

作者： LIU Qingguo LIU Xinxue wu jian LI Yaxiong Xi’an High-tech Institute Xi’an 710025China

Fast computation of the landing footprint of a space-to-ground vehicle is a basic requirement for the deployment of parking orbits, as well as for enabling decision makers to develop real-time programs of transfer trajectories. In order to address the usually slow computational time for the determination of the landing footprint of a space-to-ground vehicle under finite thrust, this work proposes a method that uses polynomial equations to describe the boundaries of the landing footprint and uses back propagation(BP) neural networks to quickly determine the landing footprint of the space-to-ground vehicle. First, given orbital parameters and a manoeuvre moment, the solution model of the landing footprint of a space-to-ground vehicle under finite thrust is established. Second, given arbitrary orbital parameters and an arbitrary manoeuvre moment, a fast computational model for the landing footprint of a space-to-ground vehicle based on BP neural networks is ***, the simulation results demonstrate that under the premise of ensuring accuracy, the proposed method can quickly determine the landing footprint of a space-to-ground vehicle with arbitrary orbital parameters and arbitrary manoeuvre moments. The proposed fast computational method for determining a landing footprint lays a foundation for the parking-orbit configuration and supports the design of real-time transfer trajectories.

关键词： space-to-ground vehicle landing footprint back propagation(BP)neural network fast computational method Pontryagin's minimum principle

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Recent advances in ocular lubrication

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Friction 2024年第9期12卷 1929-1954页

作者： jianhua ZHANG Yunjuan SU jian wu Hongdong WANG School of Mechatronic Engineering and Automation and Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai UniversityShanghai 200444China

The ocular lubrication,where the eyelid constantly slides on the curved corneal surface,is considered as one of primary lubrication systems in *** reliable lubrication conditions,sensitive ocular tissues remain intact from fatigue damage during spontaneous blink *** tear film,evenly filled between cornea and conjunctiva,is a biological fluid with dynamic adjustment ability,which provides superior lubrication with the friction coefficient of below ***,the lubrication failure may result in a variety of uncomfortable symptoms such as inflammatory reactions,tissue damage and neurological ***,it is essential to clarify the fundamental mechanism of ocular lubrication,which helps to alleviate and even recover from various ocular *** review firstly demonstrates that the ocular components,containing lipids and mucins,contribute to maintaining the lubrication stability of tear ***,the ocular lubrication state in various physiological environments and the physical effect on tear film dynamics are further *** typical applications,the therapeutic agents of dry eye syndrome and contact lens with superior lubrication effects are introduced and their lubrication mechanisms are ***,this review summarizes a series of the latest research inspired by ocular ***,this work will provide a valuable guidance on the theoretical research and extensive applications in the field of biological lubrication.

关键词： bio-tribology ocular lubrication tear film dry eye syndrome tear film dynamics

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