检索结果-南通市图书馆

Screening COVID-19 from chest X-ray images by an optical diffractive neural network with the optimized F number

Photonics Research 2024年第7期12卷 1410-1426页

作者： JIALONG WANG SHOUYU CHAI WENTING GU BOYI LI XUE JIANG YUNXIANG ZHANG HONGEN LIAO XIN LIU DEAN ta Academy for Engineering and Technology Fudan UniversityShanghai 200433China Center for Biomedical Engineering Fudan UniversityShanghai 200433China Department of Chemistry Fudan UniversityShanghai 200433China Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing 100084China

The COVID-19 pandemic continues to significantly impact people's lives worldwide, emphasizing the critical need for effective detection methods. Many existing deep learning-based approaches for COVID-19 detection offer high accuracy but demand substa.tial computing resources, time, and energy. In this study, we introduce an optical diffractive neural network(ODNN-COVID), which is characterized by low power consumption, efficient parallelization, and fast computing speed for COVID-19 detection. In addition, we explore how the physical parameters of ODNN-COVID affect its diagnostic performance. We identify the F number as a key parameter for evaluating the overall detection capabilities. Through an assessment of the connectivity of the diffractive network, we esta.lished an optimized range of F number, offering guidance for constructing optical diffractive neural networks. In the numerical simulations, a three-layer system achieves an impressive overall accuracy of 92.64% and 88.89% in binary-and threeclassification diagnostic ta.ks. For a single-layer system, the simulation accuracy of 84.17% and the experimenta. accuracy of 80.83% can be obta.ned with the same configuration for the binary-classification ta.k, and the simulation accuracy is 80.19% and the experimenta. accuracy is 74.44% for the three-classification ta.k. Both simulations and experiments validate that the proposed optical diffractive neural network serves as a passive optical processor for effective COVID-19 diagnosis, featuring low power consumption, high parallelization, and fast computing capabilities. Furthermore, ODNN-COVID exhibits versatility, making it adapta.le to various image analysis and object classification ta.ks related to medical fields owing to its general architecture.

关键词： neural network offering

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

Ag-GST/HfO_(x)-based unidirectional threshold switching selector with low leakage current and threshold volta.e distribution for high-density cross-point arrays

引用

Rare Meta.s 2024年第1期43卷 280-288页

作者： Kyoung-Joung Yoo Dae-Yun Kang Nahyun Kim Ho-Jin Lee ta.Hyeong Kim ta.ho Kim ta. Geun Kim School of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea

The use of electrochemical-meta.lization-based volatile threshold switching selectors in cross-point arrays has been widely explored owing to their high on-off ratios and simple ***,these devices are unsuita.le for cross-point architectures because of the difficulty in controlling the random filament formation that results in large fluctuations in the threshold volta.e during *** this study,we investigated the unidirectional threshold transition characteristics associated with an Ag/GST/HfO_(x)/Pt-based bilayer selector and demonstrated the occurrence of a low leakage current(ta.e(Δ0.11 V).The bilayer structure could control the filament formation in the intermediate sta.e through the insertion of an HfO_(x) tunneling *** sta.king a bilayer selector with NiO_(x)based resistive random-access memory,the leakage and programming currents of the device could be significantly *** the crossbar array configuration,we performed equivalent circuit analysis of a one-selector oneresistor(1S1R) devices and estimated the optimal array size to demonstrate the applicability of the proposed *** maximum accepta.le crossbar array size of the 1S1R device with the Ag/GST/HfO_(x)/Pt/Ti/NiO_(x)/Pt structure was 5.29×10^(14)(N^(2),N=2.3×10^(7)).

关键词： Selector device Tunneling barrier Threshold switching Sputtering 1S1R Cross-point array

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

Machine learning-based comparison of factors influencing estimated glomerular filtration rate in Chinese women with or without nonalcoholic fatty liver

引用

World Journal of Clinical Cases 2024年第15期12卷 2506-2521页

作者： I-Chien Chen Lin-Ju Chou Shih-Chen Huang ta.Wei Chu Shang-Sen Lee Department of Nursing Kaohsiung Armed Forces General HospitalKaohsiung 802Taiwan Department of Obstetrics and Gynecology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Chief Executive Officer's Office MJ Health Research FoundationTaipei 114Taiwan Department of Urology Taichung Tzu Chi HospitalBuddhist Tzu Chi Medical FoundationTaichung 427Taiwan School of Medicine Tzu Chi UniversityHualian 970Taiwan Department of Urology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND The prevalence of non-alcoholic fatty liver(NAFLD)has increased *** with NAFLD are known to have higher chance for renal function *** past studies used traditional multiple linear regression(MLR)to identify risk factors for decreased estimated glomerular filtration rate(eGFR).However,medical research is increasingly relying on emerging machine learning(Mach-L)*** present study enrolled healthy women to identify factors affecting eGFR in subjects with and without NAFLD(NAFLD+,NAFLD-)and to rank their *** To uses three different Mach-L methods to identify key impact factors for eGFR in healthy women with and without *** A tota. of 65535 healthy female study participants were enrolled from the ta.wan MJ cohort,accounting for 32 independent variables including demographic,biochemistry and lifestyle parameters(independent variables),while eGFR was used as the dependent *** from MLR,three Mach-L methods were applied,including stochastic gradient boosting,eXtreme gradient boosting and elastic *** of estimation were used to define method accuracy,where smaller degree of error indicated better model *** Income,albumin,eGFR,High density lipoprotein-Cholesterol,phosphorus,forced expiratory volume in one second(FEV1),and sleep time were all lower in the NAFLD+group,while other factors were all significantly higher except for smoking ***-L had lower estimation errors,thus outperforming *** Model 1,age,uric acid(UA),FEV1,plasma calcium level(Ca),plasma albumin level(Alb)and T-bilirubin were the most importa.t factors in the NAFLD+group,as opposed to age,UA,FEV1,Alb,lactic dehydrogenase(LDH)and Ca for the *** the importa.ce percenta.e was much higher than the 2nd importa.t factor,we built Model 2 by removing *** The eGFR were lower in the NAFLD+group compared to the NAFLD-group,with age being was the most importa.t impact factor in both groups of he

关键词： Non-alcoholic fatty liver Estimated glomerular filtration rate Machine learning Chinese women

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

Stercoral perforation of the cecum:A case report

引用

World Journal of Gastrointestinal Surgery 2024年第4期16卷 1189-1194页

作者： Hung-Chun Yu ta.Wei Pu Jung-Cheng Kang Chao-Yang Chen Je-Ming Hu Ruei-Yu Su Department of Surgery Taichung Armed Forces General HospitalTaichung 411228Taiwan Department of Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Division of Colon and Recta. Surgery Department of SurgeryTri-Service General Hospital Songshan BranchNational Defense Medical CenterTaipei 105Taiwan Division of Colon and Recta. Surgery Department of SurgeryTaiwan Adventist HospitalTaipei 105Taiwan Division of Colon and Recta. Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 105Taiwan Department of Pathology and Laboratory Medicine Taoyuan Armed Forces General HospitalTaoyuan 325Taiwan

BACKGROUND With less than 90 reported cases to date,stercoral perforation of the colon is a rare *** ulceration is thought to occur due to ischemic pressure necrosis of the bowel wall,which is caused by the presence of a stercoraceous *** underscore this urgent surgical situation concerning clinical presenta.ion,surgical treatment,and results,we present the case of a 66-year-old man with a stercoral *** SUMMARY A 66-year-old man with a history of hypertension,hyperlipidemia,and gout presented at the emergency department with lower abdominal pain and a low-grade fever lasting for a few *** computed tomography indicated a suspected bezoar(approximately 7.6 cm)in the dilated cecum,accompanied by pericolic fat stranding,mild proximal dilata.ion of the ileum,pneumoperitoneum,and minimal ***,feculent peritonitis with isolated cecal perforation were ***,a right hemicolectomy with peritoneal lavage was performed.A histopathological examination supported the intraoperative *** In stercoral perforations,a diagnosis should be diligently pursued,especially in older adults,and prompt surgical intervention should be implemented.

关键词： Acute abdomen Colectomy Peritoneal lavage Pneumoperitoneum Bezoars Case report

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

Experimenta. realization of fracta. fretwork meta.urface for sound anomalous modulation

引用

Chinese Physics B 2024年第5期33卷 473-478页

作者：何佳杰于书萌江雪他得安 Department of Biomedical Engineering School of Information Science and TechnologyFudan UniversityShanghai 200433China Academy for Engineering and Technology Fudan UniversityShanghai 200433China

Natural creatures and ancient cultures are full of potential sources to provide inspiration for applied *** by the fracta. geometry in nature and the fretwork frame in ancient culture,here we design the acoustic meta.urface to realize sound anomalous modulation,which manifests itself as an incident-dependent propagation behavior:sound wave propagating in the forward direction is allowed to transmit with high efficiency while in the backward direction is obviously *** quantita.ively investigate the dependences of asymmetric transmission on the propagation direction,incident angle and operating frequency by calculating sound transmitta.ce and energy *** compact fracta. fretwork meta.urface for acoustic anomalous modulation would promote the development of integrated acoustic devices and expand versatile applications in acoustic communication and information encryption.

关键词： acoustic meta.urface fracta. geometry sound anomalous modulation

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

Colon perforation with severe peritonitis caused by erotic toy insertion and treated using vacuum-assisted closure:A case report

引用

World Journal of Clinical Cases 2024年第18期12卷 3548-3554页

作者： Cheng-You Lin ta.Wei Pu Department of Surgery Division of Colon and Rectal SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Surgery Taichung Armed Force General HospitalTaichung 411Taiwan Division of Colon and Recta. Surgery Department of SurgeryTri-Service General Hospital Songshan branchNational Defense Medical CenterTaipei 105Taiwan

BACKGROUND Colorecta. foreign bodies are commonly encountered during *** are frequently observed in men 20 to 90 years of age and have bimodal age *** management is necessary for cases of recta. ***,surgical site infections are the most common complications after colorecta. *** SUMMARY We discuss a case of recta. perforation in a patient who presented to our hospita. 2 d after its *** perforation occurred as a result of the patient inserting a sex toy in his *** peritonitis was attributa.le to delayed *** Vacuum-assisted closure was performed to treat the wound,which healed well after *** complications were noted.

关键词： Colorecta. surgery Foreign bodies Intestinal perforation Surgical site infection Wound closure techniques Case report

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

Mucinous neoplasm of the appendix:A case report and review of literature

引用

World Journal of Gastrointestinal Surgery 2024年第3期16卷 944-954页

作者： Hao-Cheng Chang Jung-Cheng Kang ta.Wei Pu Ruei-Yu Su Chao-Yang Chen Je-Ming Hu Department of Surgery Tri-Service General HospitalTaipei 114TaiwanChina Division of Colon and Recta. Surgery Department of SurgeryTaiwanChina Adventist HospitalTaipei 105TaiwanChina Division of Colon and Recta. Surgery Department of SurgeryTri-Service General Hospital Songshan BranchNational Defense Medical CenterTaipei 105TaiwanChina Division of Colon and Recta. Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114TaiwanChina Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 105TaiwanChina Department of Pathology and Laboratory Medicine Taoyuan Armed Forces General HospitalTaoyuan 325TaiwanChina

BACKGROUND Appendiceal mucinous neoplasms(AMNs),although not classified as rare,are relatively uncommon tumors most often discovered incidenta.ly during colorecta. *** identification of AMNs is difficult due to non-specific sym-ptoms,overlapping tumor markers with other conditions,and the potential for *** underscores the urgent need for precision in diagnosis to pre-vent severe *** SUMMARY This case report describes the unexpected discovery and treatment of a low-grade AMN(LAMN)in a 74-year-old man undergoing laparoscopic hemicolectomy for transverse colon adenocarcinoma(AC).Preoperatively,non-specific gastroin-testinal symptoms and elevated tumor markers masked the presence of *** tumor,presumed to be an AMN peritoneal cyst intraoperatively,was con-firmed as LAMN through histopathological *** neoplasm exhibited mucin accumulation and a distinct immunohistochemical profile:Positive for Ho-meobox protein CDX-2,Cytokeratin 20,special AT-rich sequence-binding protein 2,and Mucin 2 but negative for cytokeratin 7 and Paired box gene *** profile aids in distinguishing appendiceal and ovarian mucinous *** recovery was uncomplicated,and the patient initiated adjuvant chemotherapy for the colon *** This case highlights the diagnostic complexity of AMNs,emphasizing the need for vigilant identification to avert potential complications,such as pseudomyxoma peritonei.

关键词： Adenocarcinoma Appendiceal neoplasms Low-grade appendiceal mucinous neoplasm Peritoneal neoplasms Pseudomyxoma peritonei Case report

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

Molecular phylogenetic relationships based on mitochondrial genomes of novel deep-sea corals(Octocorallia:Alcyonacea):Insights into slow evolution and adapta.ion to extreme deep-sea environments

引用

Zoological Research 2024年第1期45卷 215-225页

作者： Zhan-Fei Wei Kai-Wen ta.Nan-Nan Zhang Shan-Shan Liu Liang Meng Kai-Qiang Liu Chong-Yang Cai Xiao-Tong Peng Chang-Wei Shao National Key Laboratory of Mariculture Biobreeding and Susta.nable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China BGI-Qingdao BGI-ShenzhenQingdaoShandong 266555China Institute of Deep-Sea Science and Engineering Chinese Academy of SciencesSanyaHainan 572000China

A tota. of 10 specimens of Alcyonacea corals were collected at depths ranging from 905 m to 1633 m by the manned submersible Shenhai Yongshi during two cruises in the South China Sea(SCS).Based on mitochondrial genomic characteristics,morphological examination,and sclerite scanning electron microscopy,the samples were categorized into four suborders(Calcaxonia,Holaxonia,Scleraxonia,and Stolonifera),and identified as 9 possible new cold-water coral *** of GC-skew dissimilarity,phylogenetic dista.ce,and average nucleotide identity(ANI)revealed a slow evolutionary rate for the octocoral mitochondrial *** nonsynonymous(Ka)to synonymous(Ks)substitution ratio(Ka/Ks)suggested that the 14 protein-coding genes(PCGs)were under purifying selection,likely due to specific deep-sea environmenta. *** analysis of the median Ka/Ks values of five gene families and environmenta. factors indicated that the genes encoding cytochrome b(cyt b)and DNA mismatch repair protein(mutS)may be influenced by environmenta. factors in the context of deep-sea species *** study highlights the slow evolutionary pace and adaptive mechanisms of deep-sea corals.

关键词： Mitochondrial genome Alcyonacea Ka/Ks evolution Environmenta. factors

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

The Protocol of Ultrasonic Backscatter Measurements of Musculoskeleta. Properties

引用

Phenomics 2024年第1期4卷 72-80页

作者： Dongsheng Bi Lingwei Shi Boyi Li Ying Li Chengcheng Liu Lawrence HLe Jingchun Luo Sijia Wang Dean ta Center for Biomedical Engineering School of InformationScience and TechnologyFudan University2005 SonghuRoadYangpu DistrictShanghai 200438China Academy for Engineering and Technology Fudan UniversityShanghai 200433China Department of Radiology and Diagnostic Imaging University of AlbertaEdmonton T6G2B7Canada Human Phenome Institute Fudan UniversityShanghai 201203China Shanghai Institute of Nutrition and Health Chinese Academyof SciencesShanghai 200031China

This study aims to introduce the protocol for ultrasonic backscatter measurements of musculoskeleta. properties based on a novel ultrasonic backscatter bone diagnostic(UBBD)***-energy X-ray absorptiometry(DXA)can be adopted to measure bone mineral density(BMD)in the hip,spine,legs and the whole *** muscle and fat mass in the legs and the whole body can be also calculated by DXA body composition *** on the proposed protocol for backscatter measurements by UBBD,ultrasonic backscatter signals can be measured in vivo,deriving three backscatter parameters[apparent integral backscatter(AIB),backscatter signal peak amplitude(BSPA)and the corresponding arrival time(BSPT)].AIB may provide importa.t diagnostic information about bone *** and BSPT may be importa.t indicators of muscle and fat *** sta.dardized backscatter measurement protocol of the UBBD instrument may have the potential to evaluate musculoskeleta. characteristics,providing help for promoting the application of the backscatter technique in the clinical diagnosis of musculoskeleta. disorders(MSDs),such as osteoporosis and muscular atrophy.

关键词： Ultrasonic backscatter Musculoskeleta. disorders Bone mineral density Muscle mass Fat mass

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

Trade-Offs and Synergie Effects of Regulating Ecosystem Services along an Climatic Gradient in Slovakia

引用

Journal of Geoscience and Environment Protection 2024年第6期12卷 135-150页

作者： Jarmila Makovníková Sta.islav Kološta.Boris Pálka National Agricultural and Food Centre Soil Science and Conservation Research Institute Bratislava Regional Station Bansk Bystica Bansk Bystrica Slovakia Faculty of Economics Matej Bel University Bansk Bystrica Slovakia

This study aims to assess the synergies and trade-offs of regulating ecosystem services. Ecosystem services are non-linearly interconnected and changes in one service can positively or negatively affect another. We evaluated ecosystem services based on biophysical indicators using an expert scoring system that determines the corresponding soil functions and is part of the existing data.ases available in Slovakia. This methodological combination enabled us to provide unique mapping and assessment of ecosystem services within Slovakia. Correlation analysis between individual regulating ecosystem services and climate regions, slope, texture, and altitude confirm the sta.istically significant influence of climate and slope in all agricultural land, arable land, and grassland ecosystems. Sta.istically significant synergistic effects were esta.lished between the regulation of the water regime and the regulation of soil erosion within each climate region, apart from the very warm climate region. Only in a very warm climate region was potential of regulating ecosystem services mutually beneficial for soil erosion control and soil cleaning potential (immobilization of inorganic polluta.ts).

关键词： Agroecosystem Services Climatic Zone Mapping Trade-Offs Synergies

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：