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Endoscopy-assisted lightweight diagnosis system based on transformers for colon polyp detection

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Optoelectronics Letters 2025年第1期21卷 57-64页

作者： FAN Weiming yu Jiahui ju Zhaojie School of Automation and Electrical Engineering Shenyang Ligong University Department of Biomedical Engineering Zhejiang University School of Computing University of Portsmouth

The integration of endoscopy has significantly propelled the diagnosis and treatment of gastrointestinal diseases, with colonoscopy establishing itself as the primary method for early diagnosis and preventive care in colorectal cancer(CRC). Although deep learning holds promise in mitigating missed polyp rates, modern endoscopy examinations pose additional challenges, such as image blurring and atomizing. This study explores lightweight yet powerful attention mechanisms, introducing the spatial-channel transformer(SCT), an innovative approach that leverages spatial channel relationships for attention weight calculation. The method utilizes rotation operations for inter-dimensional dependencies, followed by residual transformation, encoding inter-channel and spatial information with minimal computational overhead. Extensive experiments on the CVC-Clinic DB polyp detection dataset, addressing endoscopy pitfalls, underscore the superiority of our SCT over other state-of-the-art methods. The proposed model maintains high performance, even in challenging scenarios.

关键词： Endoscopy

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期 174-180页

作者： Fan-Xiao Meng Xing-yu Wang Ka Lu ju-Song Yang Fu-Min Zhang Ai-jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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DOMAIN DECOMPOSITION WITH NONMATCHING GRIDS FOR EXTERIOR TRANSMISSION PROBLEMS VIA FEM AND DTN MAPPING

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Journal of Computational Mathematics 2006年第3期24卷 323-342页

作者： ju-e Yang De-hao yu LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China

In this paper, we are concerned with a non-overlapping domain decomposition method （DDM） for exterior transmission problems in the plane. Based on the natural boundary integral operator, we combine the DDM with a Dirichlet-to-Neumann （DtN） mapping and provide the numerical analysis with nonmatching grids. The weak continuity of the approximation solutions on the interface is imposed by a dual basis multiplier. We show that this multiplier space can generate optimal error estimate and obtain the corresponding rate of convergence. Finally, several numerical examples confirm the theoretical results.

关键词： Domain decomposition Nature boundary element Nonmatching grids Weakcontinuity D-N alternating Dual basis Projection operator Error estimate.

A review of cryogenic power generation cycles with liquefied natural gas cold energy utilization

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Frontiers in Energy 2016年第3期10卷 363-374页

作者： Feier XUE yu CHEN Yonglin ju Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200240 China College of Mechanical Engineering Shanghai University of Engineering Science Shanghai 201620 China

Liquefied natural gas （LNG）, an increasingly widely applied clean fuel, releases a large number of cold energy in its regasification process. In the present paper, the existing power generation cycles utilizing LNG cold energy are introduced and summarized. The direction of cycle improvement can be divided into the key factors affecting basic power generation cycles and the structural enhancement of cycles utilizing LNG cold energy. The former includes the effects of LNG-side parameters, working fluids, and inlet and outlet thermodynamic parameters of equipment, while the latter is based on Rankine cycle, Brayton cycle, Kalina cycle and their compound cycles. In the present paper, the diversities of cryogenic power generation cycles utilizing LNG cold energy are discussed and analyzed. It is pointed out that further researches should focus on the selection and component matching of organic mixed working fluids and the combination of process simulation and experi- mental investigation, etc.

关键词： liquefied natural gas (LNG) cold energy,power generation cycle Rankine cycle compound cycle

Investigation on Relationships among Deformation,Texture and Properties of TA16 Alloy Tube

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Journal of Materials Science & Technology 2001年第1期17卷 151-152页

作者： Weilu WU Zhentao yu ju DENG Northwest institute for Nonferrous Metal Research P.O.Box 51 Xi’an 710016China

The relationships among the deformation, texture and properties of TA16 alloy tube were investigated, an optimum processing parameter was obtained. High Q (the ratio of reduction of diameter to reduction of wall thickness) values increase tensile, flaring properties and reduce flattening; high Q values increase tensile strength, flattening, flaring. and decrease tensile elonga. tion. The main circular textures of rolling tubes are basal (0001) and pyramidal {1015}, {1014}, {1013} etc., and the main axial textures are prism {1010} and pyramidal {1120}, {2131}, {2021} etc. under different Q and E values. There are greater changes in the grain size under different E values, compared with that under different Q values.

关键词： processing parameter tensile strength wall thickness grain size

Efficacy of active compounds of Chanqin granules on airway neurogenic inflammation induced by PM2.5 in vivo

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Journal of Traditional Chinese Medicine 2020年第5期40卷 792-802页

作者： ju Ya Shen Ruobing yu Xiaoping Department of Traditional Chinese Medicine Shuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 200120China

OBJECTIVE:To investigate the efficacy of active compounds of Chanqin(CQ)granules on PM2.5-induced airway neurogenic inflammation in vivo,and to elucidate the underlying mechanisms of ***:The Traditional Chinese Medicine systems pharmacology(TCMSP)database was searched,and the results were combined with oral bioavailability and drug analysis to identify the compounds in CQ *** pharmacophore modeling approach was used to predict the compound targets,and the diseases corresponding to the targets were obtained by searching the therapeutic target database(TTD),pharmacogenomics knowledgebase(Pharm GKB)and Drug Bank *** software was used to construct the network pharmacological charts for Component-Target and Target-Disease interactions of the CQ ***,the mechanisms of action and effectiveness of CQ granules for the treatment of PM2.5-induced airway neurogenic inflammation were ***:A total of 195 compounds and 171 targets were obtained from the analyses.A total of569 corresponding diseases were identified for these ***-target and target-disease networks were *** possible mechanisms and effective components in CQ granules for treating airway neurogenic inflammation were ***,kaempferol and isorhamnetin,beta-sitosterol and sitosterol,which are typically found in the formulation,have extensive pharmacological activities,including anti-inflammatory,antioxidant and antiviral actions and neuroprotective *** these targets,androgen receptor,estrogen receptor,prostaglandin G/H synthase 2,and inducible nitric oxide synthase play important pathological roles,including the induction of neurogenic *** granules may have therapeutic effectiveness for numerous diseases in addition to respiratory diseases,including neoplasms,digestive system diseases,cardiovascular diseases,respiratory tract diseases and nervous system *** vivo,CQ granules are effective in trea

关键词： Neurogenic inflammation Pharmacology Neuropeptides MAP kinase signaling system Ganglia,spinal PM2.5 Chan Qin granules

Quick-homogeneous Corrosion of Ti-2A1-2.5Zr Alloy in High-temperature and High-pressure Water Steam

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Journal of Materials Science & Technology 2001年第1期17卷 43-44页

作者： Lin YANG Zhentao yu ju DENG Northwest institute for Nonferrous Metal Research Xi’an 710016China

The corrosion behavior of Ti-2A1-2.5Zr alloy with 5 alloy contents and 5 surface states were studied in water steam at 400℃, 10.3 MPa for 72 h. The weight-increments of all samples are under 4 mg/dm2, better than Zr and Zr-alloy. or-Ti is oxidized into anatase-type TiO2 preferentially. The corrosion resistance is improved by adding Al element or pre-oxidizing treatment, the latter is more effective relatively.

关键词： corrosion resistance corrosion behavior surface states Al element

Climate effects of the GlobeLand30 land cover dataset on the Beijing Climate Center climate model simulations

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Science China Earth Sciences 2016年第9期59卷 1754-1764页

作者： SHI XueLi NIE SuPing ju WeiMin yu Le National Climate Center Beijing 100081 China International Institute for Earth System Science (ESSI) Nanjing University Nanjing 210093 China Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University Beijing 100084 China Joint Center for Global Change Studies Beijing 100875 China

Land cover is one of the most basic input elements of land surface and climate models. Currently, the direct and indirect effects of land cover data on climate and climate change are receiving increasing attentions. In this study, a high resolution(30 m) global land cover dataset(Globe Land30) produced by Chinese scientists was, for the first time, used in the Beijing Climate Center Climate System Model(BCC_CSM) to assess the influences of land cover dataset on land surface and climate simulations. A two-step strategy was designed to use the Globe Land30 data in the model. First, the Globe Land30 data were merged with other satellite remote sensing and climate datasets to regenerate plant functional type(PFT) data fitted for the BCC_CSM. Second, the up-scaling based on an area-weighted approach was used to aggregate the fine-resolution Globe Land30 land cover type and area percentage with the coarser model grid resolutions globally. The Globe Land30-based and the BCC_CSM-based land cover data had generally consistent spatial distribution features, but there were some differences between them. The simulation results of the different land cover type dataset change experiments showed that effects of the new PFT data were larger than those of the new glaciers and water bodies(lakes and wetlands). The maximum value was attained when dataset of all land cover types were changed. The positive bias of precipitation in the mid-high latitude of the northern hemisphere and the negative bias in the Amazon, as well as the negative bias of air temperature in part of the southern hemisphere, were reduced when the Globe Land30-based data were used in the BCC_CSM atmosphere model. The results suggest that the Globe Land30 data are suitable for use in the BCC_CSM component models and can improve the performance of the land and atmosphere simulations.

关键词： Land cover Climate model Application strategy Numerical simulation Air temperature Precipitation

Vertically aligned two-dimensional materials-based thick electrodes for scalable energy storage systems

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Nano Research 2021年第10期14卷 3562-3575页

作者： Zhengyu ju Xiao Zhang Jingyi Wu Guihua yu Materials Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexas 78712USA

Together with the blooming of portable smart devices and electric vehicles in the last decade,electrochemical energy storage(EES)devices capable of high-energy and high-power storage are urgently ***-dimensional(2D)materials,benefiting from the short solid-state diffusion distance,are well recognized to possess excellent electrochemical ***,liquid diffusion,the rate-determining process in thick electrodes,is notably slow in 2D materials-based electrodes stemming from their stacking during electrode processing,which considerably limits their applications for high energy *** fully exploit intrinsic advantages of 2D materials for scalable energy storage devices,this review summarizes several important strategies,ranging from assembly to template methods,to fabricate vertically aligned 2D materials-based *** further discuss the advantages and challenges of these methods in terms of key features of thick electrodes and illustrate the design principles for high-energy/power devices.

关键词： two-dimensional materials energy storage alignment assembly high energy/power