检索结果-南通市图书馆

Two-Terminal Lithium-Mediated Artificial Synapses with Enhanced Weight Modulation for Feasible Hardware Neural Networks

引用

Nano-Micro Letters 2023年第5期15卷 236-253页

作者： Ji Hyun baek Kyung Ju Kwak seung Ju Kim Jaehyun Kim Jae Young Kim In Hyuk Im Sunyoung Lee Kisuk Kang Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Korea

Recently,artificial synapses involving an electrochemical reaction of Li-ion have been attributed to have remarkable synaptic ***-terminal synaptic transistors utilizing Li-ion intercalation exhibits reliable synaptic characteristics by exploiting the advantage of nondistributed weight updates owing to stable ion ***,the three-terminal configurations with large and complex structures impede the crossbar array implementation required for hardware neuromorphic ***,achieving adequate synaptic performances through effective Li-ion intercalation in vertical two-terminal synaptic devices for array integration remains ***,two-terminal Au/LixCoO_(2)/Pt artificial synapses are proposed with the potential for practical implementation of hardware neural *** Au/LixCoO_(2)/Pt devices demonstrated extraordinary neuromorphic behaviors based on a progressive dearth of Li in LixCoO_(2)*** intercalation and deintercalation of Li-ion inside the films are precisely controlled over the weight control spike,resulting in improved weight control *** types of synaptic plasticity were imitated and assessed in terms of key factors such as nonlinearity,symmetricity,and dynamic ***,the LixCoO_(2)-based neuromorphic system outperformed three-terminal synaptic transistors in simulations of convolutional neural networks and multilayer perceptrons due to the high linearity and low programming *** impressive performances suggest the vertical two-terminal Au/LixCoO_(2)/Pt artificial synapses as promising candidates for hardware neural networks.

关键词： Artificial synapse Neuromorphic Li-based Two-terminal Synaptic plasticity

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

Complete resection of large-cell neuroendocrine and hepatocellular carcinoma of the liver: A case report

引用

World Journal of Clinical Cases 2022年第23期10卷 8277-8283页

作者： Byeong Gwan Noh Hyung-Il Seo Young Mok Park Suk Kim seung baek Hong So Jeong Lee Division of HBP Surgery and Transplantation Department of SurgeryPusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Radiology Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea Department of Pathology Pusan National University School of MedicineBiomedical Research InstitutePusan National University HospitalBusan 49241South Korea

BACKGROUND Combined tumors comprising large-cell neuroendocrine carcinoma and hepatocellular carcinoma have been rarely reported in the *** SUMMARY We report a case of a 73-year-old woman with chronic hepatitis B suspected to have a malignant hepatic mass(segment 3;size,4.5 cm)and lymph node metastasis based on computed tomography and magnetic resonance *** being Child-Pugh class A,esophageal varices were *** underwent left lateral sectionectomy and lymph node *** examination revealed a collision tumor consisting of large-cell neuroendocrine(90%)and hepatocellular(10%)*** combined carcinoma had metastasized to one of the three lymph nodes *** patient recovered without any postoperative complications and was discharged in good condition on postoperative day *** chemotherapy was not *** recurrence occurred during a follow-up period of 24 *** To improve the therapeutic management of combined tumors in the liver,it is necessary to discuss each clinical experience and consider an appropriate method for the preoperative diagnosis and treatment.

关键词： Hepatocellular carcinoma Neuroendocrine carcinoma Chronic hepatitis B 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

Forecasting Winning Bid Prices in an Online Auction Market - Data mining Approaches

引用

Journal of Electronic Science and Technology of China 2004年第3期2卷 6-11页

作者： KIM Hongil baek seung College of Business Administration Hanyang University Seoul 133-791 KoreaCollege of Business AdministrationHanyang University Seoul 133-791 Korea

To solve information asymmetry problem on online auction, this study suggests and validates a forecasting model of winning bid prices. Especially, it explores the usability of data mining approaches, such as neural network and Bayesian network in building a forecasting model. This research empirically shows that, in forecasting winning bid prices on online auction, data mining techniques have shown better performance than traditional statistical analysis, such as logistic regression and multivariate regression.

关键词： Bayesian network data mining neural network price forecasting

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

Very High Cycle Fatigue Behaviors and Surface Crack Growth Mechanism of Hydrogen-Embrittled AISI 304 Stainless Steels

引用

Materials Sciences and Applications 2018年第4期9卷 393-411页

作者： seung-Hoon Nahm Hyun-Bo Shim Un-Bong baek Chang-min Suh Korea Research Institute of Standards and Science Daejeon Republic of Korea School of Mechanical Engineering Yeungnam University Daegu Republic of Korea School of Mechanical Engineering Kyungpook Nat’l University Daegu Republic of Korea

The influence of hydrogen embrittlement on the fatigue behaviors of AISI 304 stainless steel is investigated. The fatigue endurance limits of the untreated and hydrogen-embrittled materials were almost the same at 400 MPa, and hydrogen embrittlement had little influence even though the sample contained about 8.1 times more hydrogen. Thus, the sensitivity of hydrogen gas in this material is very low. A surface crack initiation, growth, coalescence, and micro ridge model is proposed in this study. Slip line formation?⇒microcrack formation?⇒increases in the crack width, and blunting of the crack tip as it grows?⇒formation of many slip lines because of deformation in the shear direction?⇒growth of the crack in the shear direction, forming micro ridges, coalescence with adjacent cracks ⇒?continuous initiation, growth, coalescence, and ridge formation of surface cracks and specimen breakage.

关键词： Hydrogen-Embrittled Fatigue Behaviors Surface Crack Initiation Growth Coalescence Micro Ridge Formation VHCF (Very High Cycle Fatigue) Fracture Surface Analysis

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

Microstructure and corrosion resistance of a Mg2Sn-dispersed Mg alloy subjected to pulsed electron beam treatment

引用

Journal of Magnesium and Alloys 2020年第2期8卷 345-351页

作者： Daseul Lee Beomcheol Kim Soo-min baek Jisoo Kim Hyung Wook Park Jung Gu Lee Sung Soo Park School of Materials Science and Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of Mechanical Aerospace and Nuclear EngineeringUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of Materials Science and Engineering University of UlsanUlsan 44610Republic of Korea

We report that the corrosion resistance of a Mg-Sn-based alloy with MgzSn precipitates can be considerably improved by surface modification using pulsed electron beam *** alloy subjected to a pulse electron beam treatment showed a modified surface layer with a thickness of〜12 μm,appearing more resistant to corrosion attack than the bare surface of the *** 0.6 M NaCl solution,the alloys with and without the surface modification exhibited average corrosion rates of 4.3 and 8.1 mm y^-1,*** improved corrosion resistance was attributed to reduced cathodic activation,resulting from the surficial reduction of relatively noble Mg2Sn precipitates.

关键词： Magnesium alloy Mg2Sn Intermetallic compound Pulsed electron beam treatment Corrosion

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

Winter distribution of diatom assemblages along the coastline of *** in 2010

引用

Acta Oceanologica Sinica 2022年第6期41卷 68-77页

作者： Joon Sang Park Kyun-Woo Lee seung Won Jung Taek-Kyun Lee Hyoung min Joo Library of Marine Samples Korea Institute of Ocean Science&TechnologyGeoje 53201R.O.Korea Marine Biotechnology Research Center Korea Institute of Ocean Science&TechnologyBusan 49111R.O.Korea Risk Assessment Research Center Korea Institute of Ocean Science&TechnologyGeoje 53201R.O.Korea Unit of Next Generation IBRV Building Program Korea Polar Research InstituteIncheon 21990R.O.Korea

Diatoms are a globally successful and eukaryotic photosynthetic organism with an ornamented silica external *** relationship between their valve morphology and habitat means that diatoms can be used as bioindicators to characterize the aquatic *** estimate the differential distribution and diversity of diatom assemblages along the coastal line,we collected phytoplankton samples from 114 coastal sites of waters of *** applied the unweighted pair-group technique using the arithmetic averages clustering method to cluster the sampling sites,apart from those where the biota consisted of other groups,such as dinoflagellates,into four regions:the Yellow Sea,South Sea,southern East Sea,and northern East *** species analysis in each region led to the selection of tychoplanktonic,chain-forming,attached species to substrates and psychrophilic indicator diatoms,respectively,each of which represented a planktonic lifestyle associated with one of the four *** study shows the diatom assemblages to serve as bioindicators of Korean coastal water in winter,and the subsequent seasonal survey will provide a starting point for the improved understanding of Korean diatom-based ecoregions,in both time and space.

关键词： diatom assemblage indicator species life-form Korean coastal waters species diversity

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

Effect of electrical stimulation on neural regeneration via the p38-RhoA and ERK1/2-Bcl-2 pathways in spinal cord-injured rats

引用

Neural Regeneration Research 2018年第2期13卷 340-346页

作者： min Cheol Joo Chul Hwan Jang Jong Tae Park seung Won Choi seungil Ro min Seob Kim Moon Young Lee Department of Rehabilitation Medicine and Institute of Wonkwang Medical Science School of Medicine Wonkwang University Department of Neurosurgery School of Medicine Wonkwang University Department of Anesthesiology and Pain Medicine School of Medicine Wonkwang University Department of Physiology and Cell Biology School of Medicine University of Nevada Department of Physiology and Institute of Wonkwang Medical Science School of Medicine Wonkwang University

Although electrical stimulation is therapeutically applied for neural regeneration in patients, it remains unclear how electrical stimulation exerts its effects at the molecular level on spinal cord injury （SCI）. To identify the signaling pathway involved in electrical stimulation improving the function of injured spinal cord, 21 female Sprague-Dawley rats were randomly assigned to three groups： control （no surgical intervention, n = 6）, SCI （SCI only, n = 5）, and electrical simulation （ES; SCI induction followed by ES treatment, n = 10）. A complete spinal cord transection was performed at the 10^th thoracic level. Electrical stimulation of the injured spinal cord region was applied for 4 hours per day for 7 days. On days 2 and 7 post SCI, the Touch-Test Sensory Evaluators and the Basso-Beattie-Bresnahan locomotor scale were used to evaluate rat sensory and motor function. Somatosensory-evoked potentials of the tibial nerve of a hind paw of the rat were measured to evaluate the electrophysiological function of injured spinal cord. Western blot analysis was performed to measure p38-RhoA and ERK1/2-Bcl-2 pathways related protein levels in the injured spinal cord. Rat sensory and motor functions were similar between SCI and ES groups. Com- pared with the SCI group, in the ES group, the latencies of the somatosensory-evoked potential of the tibial nerve of rats were significantly shortened, the amplitudes were significantly increased, RhoA protein level was significantly decreased, protein gene product 9.5 expression, ERK1/2, p38, and Bcl-2 protein levels in the spinal cord were significantly increased. These data suggest that ES can promote the recovery of electrophysiological function of the injured spinal cord through regulating p38-RhoA and ERK1/2-Bcl-2 pathway-related protein levels in the injured spinal cord.

关键词： Bcl-2 ERKI/2 p38 PGP9.5 RhoA spinal cord injury somatosensory evoked potential muscle contraction electrical impulses neural regeneration

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

用热流控制防止薄板坯漏钢

引用

钢铁 2004年第Z1期39卷 273-274页

作者： seung-Hyun baek 韩国浦项钢铁公司光阳厂

薄板坯连铸漏钢率高于传统连铸,因此更需仔细控制连铸工艺参数,但是优化与漏钢有关的许多参数不容易,因此需选择最关键参数控制漏钢.在粘结漏钢时,在相对低的热流时倾向性增加,因此把结晶器宽面的热流作为重要参数来考虑和控制,选择连... 详细信息

薄板坯连铸漏钢率高于传统连铸,因此更需仔细控制连铸工艺参数,但是优化与漏钢有关的许多参数不容易,因此需选择最关键参数控制漏钢.在粘结漏钢时,在相对低的热流时倾向性增加,因此把结晶器宽面的热流作为重要参数来考虑和控制,选择连铸保护渣、拉速、铸坯宽度、结晶器铜板锥度不合适也容易产生漏钢.因此用在线锥度控制来优化锥度设定,采用控制传热热流的办法可以降低漏钢率.

关键词：漏钢结晶器热流粘结不均匀凝固

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

Role of Jun amino-terminal kinase （JNK） in apoptosis of cavernosal tissue during acute phase after cavernosal nerve injury

引用

Asian Journal of Andrology 2018年第1期20卷 50-55页

作者： Won Hoon Song Hwancheol Son Soo Woong Kim Jae-seung Paick min Chul Cho Department of Urology Seoul National University College of Medicine Seou103080 Korea Department of Urology Seoul National University Boramae Medical Center Seeu107061 Korea

The present study aimed to identify which mitogen-activated protein kinase （p38 or Jun amino-terminal kinase [JNK]） was involved in cavernosal apoptosis during the acute phase after cavernosal nerve crush injury （CNCI） in rats to ameliorate apoptosis of cavernosal tissue, such as smooth muscle （SM）. A total of twenty 10-week-old male Sprague-Dawley rats were divided equally into two groups： sham surgery （S） and CNCI （I）. The I group approximated the clinical situation of men undergoing radical prostatectomy using two 60-second compressions of both CNs with a microsurgical vascular clamp. At 2-week postinjury, erectile response was assessed using electrostimulation. Penile tissues were harvested for immunohistochemistry analysis of alpha-SM actin （（x-SMA）, western blot analysis, and double immunofluorescence analysis of （x-SMA and phosphorylated p38 or JNK, as well as double immunofluorescent of TUNEL and phosphorylated p38 or JNK. At 2-week postinjury, the I group had a significantly lower intracavernous pressure （ICP）/mean arterial pressure （MAP） and a lower area under the curve （AUC）/MAP than the S group. The I group also exhibited decreased immunohistochemical staining of α-SMA, an increase in the number of SM cells positive for phosphorylated JNK, an increased number of apoptotic cells positive for phosphorylated JNK, and increased JNK phosphorylation compared with the S group. However, there was no significant difference in p38 phosphorylation expression or the number of SM cells positive for phosphorylated p38 between the two groups. In conclusion, our data suggest that JNK, not p38, is involved in cavernosal apoptosis during the acute phase after partial CN damage.

关键词： apoptosis erectile dysfunction Jun amino-terminal kinase mitogen-activated protein kinases p38 penis prostatectomy

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

Evaluation of Pre-Emergence and Post-Emergence Herbicides for Weed Management in Miscanthus sacchariflorus and Miscanthus sinensis

引用

Phyton-International Journal of Experimental Botany 2023年第5期92卷 1439-1467页

作者： Bimal Kumar Ghimire Chang Yeon Yu seung Hyun Kim Ill min Chung Department of Crop Science College of Sanghuh Life ScienceKonkuk UniversitySeoul05029Korea Bioherb Research Institute Kangwon National UniversityChuncheon24341Kore

Miscanthus,is a promising bioenergy crop,considered superior to other bioenergy crops because of its higher water and nutrient use efficiency,cold tolerance,and higher production of *** weeds and grass weeds,cause major problems in the Miscanthus field.A field experiment was conducted in 2018 and 2019,to assess the effects of pre-emergence(alachlor and napropamide)and post-emergence herbicides(nicosulfuron,dicamba,bentazon,and glufosinate ammonium)on broadleaf and grass weeds in *** and *** *** weed control efficiency and phytotoxicity of pre-and post-emergence herbicides were evaluated at 30 days after treatment(DAT)and compared to those of the control *** results showed wide variations in the susceptibility of the weed species to the treated *** with nicosulfuron 40 ***^(-1) provided the most effective overall weed control(with 10%visual injury),without affecting the height and biomass of neither Miscanthus species in the ***-emergence herbicides such as glufosinate ammonium 400 ***^(-1) and dicamba 482 ***^(-1) were effective and inhibited the growth and density of the majority of weeds to a 100%;however,they showed significant phytotoxicity(toxicity scale of 1-10)to both species of *** application of glufosinate ammonium caused severe injuries to the foliar region(90%visual injury)of both Miscanthus ***,*** showed a slightly higher tolerance to the herbicides nicosulfuron,bentazon and napropamide with 10%visual injury at the recommended dose than *** present study clearly showed that infestation of broadleaf and grass weeds in Miscanthus fields can cause significant damage to the growth and biomass of Miscanthus and applying pre-emergence and post-emergence herbicides effectively controls the high infestation of these weeds.

关键词： miscanthus herbicides weeds biomass chlorophyll visual injury

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：