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World Journal of Gastroenterology 2014年第27期20卷 9138-9145页

作者： lin Wang guo-li gu Zhong-Wu li Yi-Fan Peng Jin gu Department of Colorectal Surgery Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education)Peking University Cancer Hospital and Institute Department of General Surgery Air Force General Hospital Department of Pathology Department of GastroenterologyKey Laboratory of Carcinogenesis and Translational Research (Ministry of Education)Peking University Cancer Hospital and Institute

AIM: To evaluate whether an abdominoperineal excision (APE) is associated with increased local recurrence (LR) and shortened disease-free survival (DFS) in mid-low rectal cancer with a negative circumferential resecti... 详细信息

关键词： Abdominoperineal excision Preoperative radiotherapy Circumferential resection margin Survival

Study on aerosol agglomeration using the airborne ultrasonic transducer

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Particuology 2023年第11期82卷 157-165页

作者： Yuxin guo guangxue Zhang Yunchao li Hailin gu Dingkun Yuan Maosheng liu The Institute for Energy Engineering China Jiliang UniversityHangzhou310000China

Acoustic agglomeration technology use high-intensity acoustic field to make aerosol particles collide and condense rapidly. Existing studies have shown that 70%–90% of fine particles can be eliminated within minutes using compression drives and air-jet generators. Currently, there are limitations to the sound sources used. In this paper, an airborne ultrasonic transducer with a resonant frequency of 15 kHz is designed, followed by the corresponding numerical simulation and experiments for the evaluation of the vibration modal and sound pressure field. The sound pressure levels (SPL) of the open space and the agglomeration chamber can reach 150 dB and 156 dB, respectively. The agglomeration effect of water droplets, liquid phase smoke, solid phase smoke and mixed smoke is experimentally investigated, and the light transmittance rapidly increases from 8% to 60% within 4 s, 8 s, 5 s and 6 s, respectively. Agglomeration is also effective in the high-frequency range, and we infer that the acoustic wake effect is the predominant mechanism. The elimination effect is promoted with the increasing of SPL until the corresponding secondary acoustic effect is enhanced. Moreover, the agglomeration rate of higher concentration aerosol is significantly better than that of diluted aerosols in ultrasonic agglomeration process.

关键词： Acoustic agglomeration Airborne ultrasonic transducer Aerosol Sound pressure level Initial concentration

Detection and Identification of Tassel States at Different Maize Tasseling Stages Using UAV Imagery and Deep Learning

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Plant Phenomics 2024年第3期6卷 563-578页

作者： Jianjun Du Jinrui li Jiangchuan Fan Shenghao gu Xinyu guo Chunjiang Zhao Information Technology Research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China Beijing Key Lab of Digital Plants National Engineering Research Center for Information Technology in AgricultureBeijing 100097China College of Information Engineering Northwest A&F UniversityYanglingShanxi 712100 China

The tassel state in maize hybridization fields not only reflects the growth stage of the maize but also reflects the performance of the detasseling *** tassel detection models are primarily used to identify mature tassels with obvious features,making it difficult to accurately identify small tassels or detasseled *** study presents a novel approach that utilizes unmanned aerial vehicles(UAVs)and deep learning techniques to accurately identify and assess tassel states,before and after manually detasseling in maize hybridization *** proposed method suggests that a specific tassel annotation and data augmentation strategy is valuable for substantial enhancing the quality of the tassel training *** study also evaluates mainstream object detection models and proposes a series of highly accurate tassel detection models based on tassel categories with strong data *** addition,a strategy for blocking large UAV images,as well as improving tassel detection accuracy,is proposed to balance UAV image acquisition and computational *** experimental results demonstrate that the proposed method can accurately identify and classify tassels at various stages of *** tassel detection model optimized with the enhanced data achieves an average precision of 94.5%across all *** optimal model combination that uses blocking strategies for different development stages can improve the tassel detection accuracy to 98%.This could be useful in addressing the issue of missed tassel detections in maize hybridization *** data annotation strategy and image blocking strategy may also have broad applications in object detection and recognition in other agricultural scenarios.

关键词： identification different learning imagery detection deep maize stages states tasseling

FTIR-ATR study for adsorption of trypsin in aqueous environment on bare and TiO2 coated ZnSe surfaces

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Chinese Chemical Letters 2020年第1期31卷 150-154页

作者： Chune guo Xiaomi guo Wubo Chu Nan Jiang he li Key Laboratory of Marine Materials and Related Technologies CASZhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China

Undesired adsorption of proteins brings big troubles to marine *** settled proteins change the physical and chemical properties of the surfaces,which allow marine fouling organisms to settle down on the ***,to understand the adsorption mechanism of proteins is very helpful to find an environment-friendly solution against *** approaches have been developed to study protein adsorption,but most of them are insufficient to give the chemical interaction information between proteins and *** transform infrared spectroscopy with attenuated total reflection(FTIR-ATR)is an efficient,fast and non-destructive method for in situ surface measurement,which greatly minimizes the interference of water to infra red spectra,because of the very small depth of penetration of the evanescent *** this paper,an in situ FTIR-ATR technology was used to investigate the adsorption process of trypsin on a bare ZnSe surface and on a TiO2 coated ZnSe surface,and the effect of calcium cation strength and ultraviolet light irradiation on the secondary structure of trypsin were also *** spectra of trypsin showed that Amide I band red shift and AmideⅡband blue shift in aqueous environment on both surfaces compared with the dry trypsin powder,and the addition of calcium cations further changed the Amide bands position,which indicated that the change of the secondary structure could be interfered by the *** hydrogen bond formation between water and trypsin,the interaction between surface and trypsin,the interaction between hydrated calcium cations and trypsin,are major facto rs to change the secondary structure of trypsin,and UV light irradiation also showed its influence for the secondary structure.

关键词： FTIR-ATR Trypsin Secondary structure Adhesion behavior Calcium cation

Review on multi-dimensional assembled S-scheme heterojunction photocatalysts

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Journal of Materials Science & Technology 2023年第29期160卷 214-239页

作者： Jiani Lu Shaonan gu Hongda li Yinan Wang Meng guo guowei Zhou Key Laboratory of Fine Chemicals in Universities of Shandong Jinan Engineering Laboratory for Multi-scale Functional MaterialsSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China liuzhou Key Laboratory for New Energy Vehicle Power lithium Battery School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China

S-scheme heterostructure photocatalysts utilize the synergistic and superposition effects of materials,ef-fectively separating electrons and holes,maintaining strong redox capacity,and addressing issues en-countered by current photocatalytic *** review explores the origins and unique benefits of S-scheme ***,we summarized and discussed the effects of different dimensions of semiconductors constituting S-scheme heterojunctions and the similarities and differences in elec-tron transfer processes when constructing ***,we analyzed several methods for proving the formation of S-scheme heterojunctions and the electron transfer process,both directly and ***,we review the applications of S-scheme heterojunctions in various fields of photo-catalysis,including photocatalytic water splitting,pollution degradation,CO_(2) reduction and other related photocatalytic *** hope is that this review will provide an essential reference for the devel-opment and application of S-scheme heterojunction photocatalysis.

关键词： S-scheme heterojunctions Multi-dimensional assembled structures Photocatalysis Water splitting Pollution degradation Co_(2)reduction

Delay Effect on Coherent Transfer of Optical Frequency Based on a Triple-Pass Scheme

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Chinese Physics Letters 2018年第8期35卷 9-13页

作者： Chao-qun Ma li-Fei Wu Jiao gu Yan-he Chen guo-Qing Chen School of Science Jiangnan UniversityWuxi 214122 Jiangsu Provincial Research Center of light Industrial Optoelectronic Engineering and Technology Jiangnan UniversityWuxi 214122 State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062

We demonstrate a triple-pass scheme for coherent transfer of optical frequency and the delay effect on the fiber phase noise compensation. It is theoretically proved that the delay effect consists of both fiber delay and servo delay. The delay effect confines the servo bandwidth within 1/8 and induces a residual fiber phase noise after noise compensation. For a 25-km-long fiber, the servo bandwidth is found to be around 1 k Hz, and the fiber phase noise is suppressed approaching to the theoretical limitation. The triple-pass scheme enables the simultaneous transfer of optical frequency to multiple remote users. The performance of noise compensator in the triple-pass scheme can achieve a similar level result compared with that in the double-pass scheme.

关键词： Delay Effect on Coherent Transfer of Optical Frequency Based on a Triple-Pass Scheme AOM

Tool-path generation for industrial robotic surface-based application

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Advances in Manufacturing 2019年第1期7卷 64-72页

作者： he Lyu Yue liu Jiao-Yang guo he-Ming Zhang Ze-Xiang li Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong People's Republic of China Hong Kong University of Science and Technology Shenzhen Research Institute Shenzhen 518057 Guangdong People's Republic of China

Industrial robots are widely used in various applications such as machining, painting, and welding. There is a pressing need for a fast and straightforward robot programming method, especially for surface-based tasks. At present, these tasks are time-consuming and expensive, and it requires an experienced and skilled operator to program the robot for a specific task. hence, it is essential to automate the tool-path generation in order to eliminate the manual planning. This challenging research has attracted great attention from both industry and academia. In this paper, a tool-path generation method based on a mesh model is introduced. The bounding box tree and kdtree are adopted in the algorithm to derive the tool path. In addition, the algorithm is integrated into an offline robot programming system offering a comprehensive solution for robot modeling, simulation, as well as tool-path generation. Finally, a milling experiment is performed by creating tool paths on the surface thereby demonstrating the effectiveness of the system.

关键词： Industrial robot Tool path generation Simulation Intelligent manufacturing

Experimental Study and Fatigue Analysis of Vortex-Induced Vibration of Umbilical Cable Considering Internal Friction

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China Ocean Engineering 2020年第2期34卷 151-161页

作者： gu Hong-lu guo Hai-yan liU Zhen li Fu-heng AN Wan-bo li Peng College of Engineering Ocean University of ChinaQingdao 266100China College of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China

In order to investigate the effect of internal friction of umbilical cable on its vortex-induced vibration(VIV)responses,the experimental study on VIV of bond umbilical cable(BUC)and un-bond umbilical cable(UBUC)was carried out in an experimental tank.A current generator in the laboratory simulated the uniform current,and the current velocities were observed in real time by using a Doppler *** addition,different sizes of top tension were applied to the umbilical cable *** VIV responses of the umbilical cable model were measured by using Fiber Bragg grating(FBG)strain *** displacement responses of umbilical cable model were reconstructed based on the experimental strain data processed by modal superposition *** this paper,the traveling wave characteristics,the spatial-temporal distribution characteristics of frequency and fatigue damage of the BUC and UBUC under VIV are *** experimental results show that there are obvious differences between BUC and UBUC in the response characteristics of *** UBUC appears the traveling wave sooner than BUC,but its standing wave characteristics are more obvious than those of BUC at high *** with BUC,the spatial-temporal distribution of UBUC frequencies appears wide-band distribution sooner,but has narrower bandwidth in the"lock-in"*** level of fatigue damage of BUC was approximately the same as that of UBUC.

关键词： internal friction umbilical cable vortex-induced vibration traveling wave fatigue damage

An improved deep dilated convolutional neural network for seismic facies interpretation

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Petroleum Science 2024年第3期21卷 1569-1583页

作者： Na-Xia Yang guo-Fa li Ting-Hui li Dong-Feng Zhao Wei-Wei gu State Key Laboratory of Petroleum Resources and Engineering CNPC Key Lab of Geophysical ExplorationChina University of Petroleum(Beijing)Beijing 102249China Dagang Branch Research InstituteBGPTianjin300280China

With the successful application and breakthrough of deep learning technology in image segmentation,there has been continuous development in the field of seismic facies interpretation using convolutional neural *** intelligent and automated methods significantly reduce manual labor,particularly in the laborious task of manually labeling seismic ***,the extensive demand for training data imposes limitations on their wider *** overcome this challenge,we adopt the UNet architecture as the foundational network structure for seismic facies classification,which has demonstrated effective segmentation results even with small-sample training ***,we integrate spatial pyramid pooling and dilated convolution modules into the network architecture to enhance the perception of spatial information across a broader *** seismic facies classification test on the public data from the F3 block verifies the superior performance of our proposed improved network structure in delineating seismic facies *** analysis against the traditional UNet model reveals that our method achieves more accurate predictive classification results,as evidenced by various evaluation metrics for image ***,the classification accuracy reaches an impressive 96%.Furthermore,the results of seismic facies classification in the seismic slice dimension provide further confirmation of the superior performance of our proposed method,which accurately defines the range of different seismic *** approach holds significant potential for analyzing geological patterns and extracting valuable depositional information.

关键词： Seismic facies interpretation Dilated convolution Spatial pyramid pooling Internal feature maps Compound loss function

Research on Landscape Energy-Saving Integrated Water Curtain System

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Journal of Thermal Science 2019年第6期28卷 1150-1163页

作者： guo Pengxin li Hongqiang he Changjie ZheNG Yingfa li Shuisheng ZHANG guoqiang 3rd Construction Co. Ltd of China Construction Fifth EngineeringChangsha 410004China College of Civil Engineering Hunan UniversityChangsha 410082China Ltd of China Construction Fifth Engineering Changsha 410004China National Center for International Research Collaboration in Building Safety and Environment(NCIRCBSE) Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China

Aiming at the serious heat and cold loss of the building glass curtain wall in the field of amusement and tourism,and the need to meet the landscape requirements of the building facade,this paper put forward the idea of integrating the shading and consumption reduction of glass curtain wall with the landscape requirements,that is,the water curtain was set outside the glass curtain wall to form a landscape energy-saving integrated water curtain wall system,while meeting the needs of landscape and *** establishing the numerical calculation model of the system,the corresponding relationship between the thickness of water film and the weakening of solar radiation intensity was revealed,as well as the influence of wind speed and wind direction on the nozzle exit angle and velocity selection;and the synergistic law of air flow rate and air temperature drop *** results showed that the water film thickness at 3-4 cm can reduce the solar radiation by 65%-80%.The temperature of the air layer between the water film and the curtain wall decreased as the air flow rate decreased,when the thickness of water film was 2 cm and the air velocity was 0.5-1.5 m/s,the air temperature dropped to 2.47-3.6°***,through the analysis of the actual project-ICE World&WATER Park,the system can reduce 66.8%of solar radiation,and reduce the air layer temperature by 3.9°C.

关键词： glass curtain wall integration of landscape and energy-saving water curtain sunshade evaporative cooling natural resources