检索结果-南通市图书馆

Application of an artificial intelligence system for endoscopic diagnosis of superficial esophageal squamous cell carcinoma

引用

World Journal of Gastroenterology 2022年第37期28卷 5483-5493页

作者： Qian-Qian Meng Ye Gao Han Lin Tian-Jiao Wang Yan-Rong Zhang Jian Feng Zhao-Shen Li Lei Xin Luo-Wei Wang Department of Gastroenterology Changhai HospitalShanghai 200433China qingdao medcare digital engineering co.ltd. Qingdao Medcare Digital Engineering Co.Ltd.Qingdao 26600Shandong ProvinceChina

BACKGROUND Upper gastrointestinal endoscopy is critical for esophageal squamous cell carcinoma(ESCC)detection;however,endoscopists require long-term training to avoid missing superficial *** To develop a deep learning computer-assisted diagnosis(CAD)system for endoscopic detection of superficial ESCC and investigate its application *** We configured the CAD system for white-light and narrow-band imaging modes based on the YOLO v5 algorithm.A total of 4447 images from 837 patients and 1695 images from 323 patients were included in the training and testing datasets,*** experts and two non-expert endoscopists reviewed the testing dataset independently and with computer *** diagnostic performance was evaluated in terms of the area under the receiver operating characteristic curve,accuracy,sensitivity,and *** The area under the receiver operating characteristics curve,accuracy,sensitivity,and specificity of the CAD system were 0.982[95%confidence interval(CI):0.969-0.994],92.9%(95%CI:89.5%-95.2%),91.9%(95%CI:87.4%-94.9%),and 94.7%(95%CI:89.0%-97.6%),*** accuracy of CAD was significantly higher than that of non-expert endoscopists(78.3%,Pcompared with CAD)and comparable to that of expert endoscopists(91.0%,P=0.129 compared with CAD).After referring to the CAD results,the accuracy of the non-expert endoscopists significantly improved(88.2%vs 78.3%,Pcopists.

关键词： computer-aided diagnosis Artificial intelligence Deep learning Esophageal squamous cell carcinoma Early detection of cancer Upper gastrointestinal endoscopy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biological Effects of Low Energy N^+ Beams Implantation on Calluses of Autotetraploid Rice

引用

Journal of Integrative Agriculture 2013年第11期12卷 2045-2055页

作者： ZHAO Shuai-peng HUANG Qun-ce LIANG Qiu-xia ZHANG Shu-gen JIAO Zhen HUANG Wei-zhou Province Key Laboratory of Ion Beam Bioengineering College of Physics and EngineeringZhengzhou University qingdao Yuance Biological Technology co.ltd.

Calluses of two autotetraploid rice （DPR （4） and Zijing （4）） were implanted with 30 KeV N＋beams at doses ranging from 1.0×1015 to 9.0×1015 ions cm-2. The differentiation rates of calluses, the concentration of malondialdehyde （MDA）, the activities of superoxide dismutase （SOD）, catalase （CAT） and peroxidase （POD）, and the change of esterase （EST） spectrum were measured and analyzed on the calluses stage. The results showed that differentiation rates of calluses under 3.0×1015 ions cm-2 （（46.12±2.01）%） were higher than the other treatment groups in DPR （4）, and those of Zijing （4） were similar under the doses of 1.0×1015, 3.0×1015 and 5.0×1015 ions cm-2 （（40.55±2.74）, （37.77±3.04） and （34.56±2.65）%） and were higher than that of 7.0×1015 and 9.0×1015 ions cm-2. When the doses were 3.0×1015 and 5.0×1015 ions cm-2, the activities of SOD, POD and CAT were notably enhanced, and the accumulation of MDA content was markedly alleviated in the implanted calluses of two materials, as well as the activity of EST was increased by the additional isforms DPR （4）. Whereas the anti-oxidative systems and enzymes spectrum of EST were destroyed seriously, the accumulation of MDA was signiifcantly aggravated, also the differentiation rate of calluses reduced sharply and almost closed to zero when the implantation doses were 7.0×1015 and 9.0×1015 ions cm-2. It suggested that the proper dose of ion implantation effectively maintained the normal membrane structure and metabolism, and it would be also a feasible approach for autotetraploid rice to improve its genetic characteristics at calluses stage. Additionally, the differences of the radiation resistance between DPR （4） and Zijing （4） could be related to the different genotypes.

关键词： ion beams peroxidase (POD) superoxide dismutase (SOD) catalase (CAT) esterase (EST) malondialdehyde(MDA) autotetraploid rice

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Innovative design and motion mechanism analysis for a multi-moving state autonomous underwater vehicles

引用

Journal of Central South University 2017年第5期24卷 1133-1143页

作者： GAO Fu-dong HAN Yan-yan WANG Hai-dong JI Gang Department of Shipboard Aviation Security and Station Management Naval Aeronautical Engineering AcademyQingdao 266041China SANY Heavy Industry co.ltd. Changsha 410100China

In order to achieve the functional requirements of multi-moving state, a new autonomous underwater vehicle(AUV) provided with the functions such as the submarine vectorial thrust, landing on the sea bottom, wheel driving on the ground and crawling on the ground was designed. Then five new theories and methods were proposed about the motion mechanism of the AUV such as vectorial thruster technology, design of a new wheel propeller, kinematics and dynamics, navigation control and the ambient flow field in complex sea conditions, which can all conquer conventional technique shortages and predict the multi-moving state performance under wave disturbance. The theoretical research can realize the results such as a vectorial transmission shaft with the characteristics of spatial deflexion and continual circumgyratetion, parameterized design of the new wheel propeller with preferable open-water performance and intensity characteristics satisfying multi-moving state requirements, motion computation and kinetic analysis of AUV's arbitrary postures under wave disturbance, a second-order sliding mode controller with double-loop structure based on dynamic boundary layer that ensures AUV's trajectory high-precision tracking performance under wave disturbance, fast and exact prediction of the ambient flow field characteristics and the interaction mechanism between AUV hull and wheel propellers. The elaborate data obtained from the theoretical research can provide an important theoretical guidance and technical support for the manufacture of experimental prototype.

关键词： multi-moving state autonomous underwater vehicle innovative design motion mechanism wave disturbance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multiple Tin compounds Modified Carbon Fibers to construct Heterogeneous Interfaces for corrosion Prevention and Electromagnetic Wave Absorption

引用

Nano-Micro Letters 2025年第1期17卷 507-527页

作者： Zhiqiang Guo Di Lan Zirui Jia Zhenguo Gao Xuetao Shi Mukun He Hua Guo Guanglei Wu Pengfei Yin college of Science Sichuan Agricultural UniversityYa’an 625014People’s Republic of China School of Materials Science and engineering Hubei University of Automotive TechnologyShiyan 442002People’s Republic of China Institute of Materials for Energy and Environment State Key Laboratory of Bio‑Fibers and Eco‑TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China

Currently,the demand for electromagnetic wave(EMW)absorbing materials with specific functions and capable of withstanding harsh environments is becoming increasingly ***-component interface engineering is considered an effective means to achieve high-efficiency EMW ***,interface modulation engineering has not been fully discussed and has great potential in the field of EMW *** this study,multi-component tin compound fiber composites based on carbon fiber(CF)substrate were prepared by electrospinning,hydrothermal synthesis,and high-temperature thermal *** utilizing the different properties of different substances,rich heterogeneous interfaces are *** effectively promotes charge transfer and enhances interfacial polarization and conduction *** prepared SnS/SnS_(2)/SnO_(2)/CF composites with abundant heterogeneous interfaces have and exhibit excellent EMW absorption properties at a loading of 50 wt%in epoxy *** minimum reflection loss(RL)is−46.74 dB and the maximum effective absorption bandwidth is 5.28 ***,SnS/SnS_(2)/SnO_(2)/CF epoxy composite coatings exhibited long-term corrosion resistance on Q235 steel ***,this study provides an effective strategy for the design of high-efficiency EMW absorbing materials in complex and harsh environments.

关键词： Electrostatic spinning component regulation Heterogeneous interfaces Electromagnetic wave absorption corrosion protection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Initial densification strain point's determination of honeycomb structure subjected to out-of-plane compression

引用

Journal of Central South University 2017年第7期24卷 1671-1675页

作者： WANG Zhong-gang ZHOU Wei LIU Jie-fu School of Traffic&Transportation engineering Key laboratory of Traffic Safety on Track of Ministry of EducationCentral South UniversityChangsha 410075China CRRC qingdao Sifang co.ltd. Qingdao 266111China

compression ratio is significant for cellular structures on energy absorption. In the present work, theoretical formulas to determine the initial densification strain of honeycomb structure were put forward by means of minimum energy principle. Detailed densification strain points were identified, with full fold model for kinds of specimens. To validate, corresponding numerical simulations were carried out with explicit finite element method. Excellent agreement in terms of initial densification stain point has been observed between the theoretical calculation and numerical simulation. The results show that: (1) a different honeycomb structure has different initial densification strain point, and its geometric configuration of cells plays an evident role on densification; (2) half-wave length of the wrinkle of honeycomb in folding process significantly influences on the densification strain point; (3) the initial densification point is an decreasing power function of the ratio of foil thickness to cell length, with the exponent 2/3. These achievements provide important references for design in cellular energy absorption devices.

关键词： honeycomb densification strain full fold element half-wave length

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bionic Flexible Texture Design Based on Bio-Fouling Suppression Effect for Protection of Marine Structures

引用

China Ocean engineering 2023年第5期37卷 842-848页

作者： YI Peng WU Yu-peng CAI Bao-ping TIAN Xing-hui Javad MOSTAGHIMI YANG Xiao-shuang LYU Ming-li college of Mechanical and Electrical engineering China University of PetroleumQingdao 266580China Department of Mechanical and Industrial engineering University of TorontoToronto ONM5S3G8Canada qingdao Yongzhao New Material Science&Technology co.ltd. Qingdao 266061China

Marine equipments such as marine risers and oil pipelines operate in complex underwater environments and are usually attached by animals,plants and *** attachment of marine fouling organisms will accelerate the corrosion damage of offshore structure and greatly reduce the service *** have shown that non-smooth bionic surfaces with specific microstructures can inhibit fouling *** on the idea of bionics,this paper proposes a new type of underwater flexible fretting texture,which is a composite material prepared by mixing graphene and silicone rubber,and modified by pulsed laser to construct a hexagonal bionic surface *** the impact of specific water flow,the flexible texture can produce an angular displacement around 8°and a linear displacement in the amplitude range of 165μm,and the inhibition rate of fouling biological diatoms up to 97.5%,which can effectively avoid the occurrence of marine biological *** results provide a new idea for the surface protection of marine structures,which is of great significance for the development of marine industry.

关键词： flexible microstructure marine antifouling algae attachment laser-induced texture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

引用

Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan Zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng Cheng Limin Wu Chunfu Lin Renchao Che college of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Alleviation of Drought Stress in Wheat Using Exogenous Ulva prolifera Extract Produced by Enzymatic Hydrolysis

引用

Journal of Renewable Materials 2020年第11期8卷 1519-1529页

作者： Feiyu Li Siqi Zuo Yongzhou Chi Chunying Du Zhaopeng Shen Xihong Han Xiaohui Wang Peng Wang college of Food Science and engineering Ocean University of ChinaQingdao266003China Ministry of Agriculture Key Laboratory of Seaweed Fertilizers Qingdao Brightmoon Seaweed Group Co.Ltd.Qingdao266400China State Key Laboratory of Bioactive Seaweed Substances Qingdao266400China

Drought is one of the major abiotic stresses that affect plant growth and reduce agricultural *** of algal extract as a biostimulant is gaining increased attention from *** study aimed to investigate the potential of Ulva prolifera extract(UE)as a biostimulant when enzymatically extracted under conditions of water *** treatments(0.02%,0.06%,and 0.1%)significantly improved the shoot length,root length,and dry weight of roots after 120 h of drought stress relative to that in treatment with the negative *** increase in catalase(CAT)and peroxidase(POD)activity was also observed that resulted in improved antioxidant *** of 0.1%UE reduced the malondialdehyde(MDA)content by 30.06%compared with that in the negative *** addition,the soluble sugar and protein content in wheat treated with 0.1%UE was increased by 23.10%and 93.51%,respectively,resulting in adjustment of the osmotic *** suggest that UE could significantly enhance the drought tolerance of *** study provides a basis for increasing the value of UE as a biostimulant.

关键词： Ulva prolifera extract enzymatic hydrolysis antioxidant capacity osmoprotectants drought tolerance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Ethylene Tar-Based Pitch coatings on the Electrochemical Properties of Graphite Anode Materials

引用

China Petroleum Processing & Petrochemical Technology 2023年第2期25卷 41-50页

作者： Xing Yicheng Dai Chang Wu Qiang Wang Taoxiang Li Zhi Lei Jie Han Haibo Li Kang Wang Youhe Luoyang R&D Center of Technology of Sinopec engineering(Group)co.ltd. Luoyang 471003China State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580China Sinopec Maoming Petrochemical co.ltd. Maoming 525000China

To improve the electrochemical performance of graphite anode materials,pitches with various softening points(150℃,180℃,200℃,and 250℃)were prepared from ethylene tar and used to coat graphite through a liquid coating *** effects of the softening point of the pitch and the coating amount on the microstructure and electrochemical properties of graphite were studied by methods including thermogravimetric analysis,X-ray diffraction,Raman spectroscopy,surface area analysis,scanning electron microscopy,transmission electron microscopy,and electrochemical *** graphite particles were coated uniformly by the pyrolytic carbon in the *** coating changed the degree of graphitization,decreased the average specific surface area,and improved the electrochemical performance *** best battery anode performance was obtained when the mass ratio of pitch to graphite was 10%,the heat treatment temperature was 1100℃,and the softening point of the pitch was 250℃.Under the optimum conditions,the irreversible capacity loss in the first cycle at 0.1 C was only 23 mAh/g,and the first coulombic efficiency reached 94.2%.The capacity retention rate was 98.3%after 100 charge-discharge cycles at 0.1 C.

关键词： ethylene tar pitch graphite anode Li-ion batteries

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Video conference System in Mixed Reality Using a Hololens

引用

computer Modeling in engineering & Sciences 2023年第1期134卷 383-403页

作者： Baolin Sun Xuesong Gao Weiqiang Chen Qihao Sun Xiaoxiao Cui HaoGuo Cishahayo Remesha Kevin Shuaishuai Liu Zhi Liu School of Information Science and engineering Shandong UniversityQingdao266000China State Key Laboratory of digital Multi-Media Technology Hisense Co.Ltd.Qingdao266000China

The mixed reality conference system proposed in this paper is a robust,real-time video conference application software that makes up for the simple interaction and lack of immersion and realism of traditional video conference,which realizes the entire process of holographic video conference from client to cloud to the *** paper mainly focuses on designing and implementing a video conference system based on AI segmentation technology and mixed *** mixed reality conference system components are discussed,including data collection,data transmission,processing,and mixed reality *** data layer is mainly used for data collection,integration,and video and audio *** network layer uses Web-RTC to realize peer-to-peer data *** data processing layer is the core part of the system,mainly for human video matting and human-computer interaction,which is the key to realizing mixed reality conferences and improving the interactive *** presentation layer explicitly includes the login interface of the mixed reality conference system,the presentation of real-time matting of human subjects,and the presentation *** the mixed reality conference system,conference participants in different places can see each other in real-time in their mixed reality scene and share presentation content and 3D models based on mixed reality technology to have a more interactive and immersive experience.

关键词： Mixed reality AI segmentation hologram video conference Web-RTC

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：