检索结果-南通市图书馆

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

照明系统中基于模糊逻辑的亮度控制策略研究

中国照明电器 2024年第8期 43-45,90页

作者：周鹏辉吕隆飞周口师范学院机械与电气工程学院河南周口466000

模糊逻辑能够模拟人类的决策逻辑,并通过处理不确定性和模糊性数据,提供优化照明强度和能源消耗的有效方法。文章对照明系统中基于模糊逻辑的亮度控制策略进行了深入研究,以期通过理论分析与实际应用相结合的方法,进一步探索和验证模糊... 详细信息

模糊逻辑能够模拟人类的决策逻辑,并通过处理不确定性和模糊性数据,提供优化照明强度和能源消耗的有效方法。文章对照明系统中基于模糊逻辑的亮度控制策略进行了深入研究,以期通过理论分析与实际应用相结合的方法,进一步探索和验证模糊逻辑控制在智能照明中的潜力和有效性。

关键词：照明系统模糊逻辑亮度控制

维普期刊数据库博看期刊

面向56 Gb/s高速SerDes接收机DSP设计

在线全文

学校读者我要写书评

暂无评论

计算机工程与科学 2024年第7期46卷 1202-1209页

作者：胡小月王强吕方旭许超龙张锦国防科技大学计算机学院湖南长沙410073 长沙理工大学计算机与通信工程学院湖南长沙410004

高速接口芯片是高性能互连网络通信中的一款重要IP,针对56 Gb/s四脉冲幅度调制信号在高性能互连网络背板通信中,由于传输距离长信道衰减严重导致误码率高的问题,提出一种面向56 Gb/s高速Serdes接收机DSP设计。该DSP采用64路并行结构,通... 详细信息

高速接口芯片是高性能互连网络通信中的一款重要IP,针对56 Gb/s四脉冲幅度调制信号在高性能互连网络背板通信中,由于传输距离长信道衰减严重导致误码率高的问题,提出一种面向56 Gb/s高速Serdes接收机DSP设计。该DSP采用64路并行结构,通过16抽头前向反馈均衡器,以及1抽头预判决反馈均衡器对接收端数字化后的信号进行处理;采用基于K-均值聚类算法生成动态变化的判决电平并结合最小均方误差算法,能够处理15~35 dB不同信道衰减下的均衡问题。为了验证算法的性能,还搭建了一个基于模拟前端芯片和现场可编程门阵列的实验验证平台。实验结果表明,在信道衰减为15~35 dB@14 GHz,速率为56 Gb/s的条件下,误码率均小于5e-10。

关键词： K-均值算法前向反馈均衡预判决反馈均衡自适应均衡

Severe splenic rupture after colorectal endoscopic submucosal dissection

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第28期20卷 9618-9620页

作者： Alberto Herreros de Tejada luis Giménez-Alvira enrique Van den Brule Rosario Sánchez-Yuste Pilar Matallanos esther Blázquez Jose l Calleja luis e Abreu Department of Gastroenterology IDIPHIMPuerta de Hierro University Hospital Department of Surgery IDIPHIMPuerta de Hierro University Hospital Department of Radiology IDIPHIMPuerta de Hierro University Hospital Department of Pathology IDIPHIMPuerta de Hierro University Hospital

Splenic rupture(SR)after colonoscopy is a very rare but potentially serious *** diagnosis is common,and may increase morbidity and mortality *** is no clear relation between SR and difficult diagnostic or therapeutic procedures,but it has been suggested that loop formation and excessive torquing might be risk *** is a case of a65-year-old woman who underwent endoscopic submucosal dissection(eSD)for lateral spreading tumor in the descending colon,and 36 h afterwards presented symptoms and signs of severe hypotension due to *** splenectomy was completed and the patient recovered *** eSD is usually a long and position-demanding technique,implying torquing and loop *** our knowledge this is the first case of SR after colorectal eSD reported in the *** performing colorectal eSD in the left colon must be aware of this potential complication.

关键词： Splenic rupture endoscopic submucosal dissection Colorectal neoplasm Colonoscopy Splenectomy

landau–Stanyukovich Rule and the Similarity Parameter of Converging Shock Waves in Magnetogasdynamics

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

Chinese Physics letters 2011年第9期28卷 170-173页

作者： Mithilesh Singh l.P.Singh Akmal Husain Department of Mathematics Dehradun Institute of TechnologyDehradunIndia Department of Applied Mathematics Institute of TechnologyBanaras Hindu UniversityIndia

Second-kind self-similar solutions to a problem of converging cylindrical shock waves in magnetogasdynamics are *** trial functions suggested by Chisnell and the shooting method of landau–Stanyukovich are used to determine the similarity exponent for different values of specific heat ratioγand the parameter k,where kın(0,1].Detailed analyses of flow patterns for different values of adiabatic heat exponent and magnetic field strength are carried *** is observed that the general behavior of the velocity and density profiles is not affected in a magnetogasdynamics regime whereas there is an increase in the absolute value of the flow parameters with an increase in the magnetic field ***,the pressure profiles are greatly affected by the magnetic field interaction.

关键词： interaction landau dynamics

基于非对称UNet网络的磁共振图像胃肠道语义分割方法研究

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

电子器件 2024年第2期47卷 552-556页

作者：吕刚吴漾应明亮金华开放大学图文信息中心浙江金华321000 华南理工大学设计学院广东广州510641 金华市中心医院医学影像科浙江金华321000

靶区和脏器的自动化标注是磁共振图像引导放疗的关键技术之一。研究了磁共振图像中胃肠道等空腔脏器语义分割的方法,在语义分割任务中,往往输入图象比输出图像复杂很多,假设网络的复杂度和输入输出的图像复杂度正相关,提出了一个12层的... 详细信息

靶区和脏器的自动化标注是磁共振图像引导放疗的关键技术之一。研究了磁共振图像中胃肠道等空腔脏器语义分割的方法,在语义分割任务中,往往输入图象比输出图像复杂很多,假设网络的复杂度和输入输出的图像复杂度正相关,提出了一个12层的非对称UNet网络,把更多的网络参数放在编码器上,解码器的参数量只有编码器的三分之一。实验结果表明在UMWGI数据集上对胃、大肠、小肠的语义分割任务中,所提方法的DSC综合得分达到了0.856,Hausdorff_95得分达到了3.743,相同网络规模的条件下,优于对称结构的UNet网络和Transfomer网络,说明所提方法可以较好地完成磁共振图像中的胃肠道语义分割,边界分割也较为理想,为实现磁共振图像上胃肠道的自动化标注提供了可行方案。

关键词：语义分割磁共振图像胃肠道深度学习 UNet网络

Finite cell method compared to h-version finite element method for elasto-plastic problems

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(english edition) 2014年第10期35卷 1239-1248页

作者： A.ABeDIAN J.PARVIZIAN A.DSTeR e.RANK Department of Mechanical engineering Daneshpajoohan Higher Education Institute Department of Mechanical engineering Isfahan University of Technology Numerische Strukturanalyse mit Anwendungen in der Schiffstechnik (M-10) Technische Universitt Hamburg-Harburg lehrstuhl fr Computation in engineering Fakultt fr Bauingenieur-und Vermessungswesen Technische Universitt Mnchen

The finite cell method （FCM） combines the high-order finite element method （FeM） with the fictitious domain approach for the purpose of simple meshing. In the present study, the FCM is used to the Prandtl-Reuss flow theory of plasticity, and the results are compared with the h-version finite element method （h-FeM）. The numerical results show that the FCM is more efficient compared to the h-FeM for elasto-plastic problems, although the mesh does not conform to the boundary. It is also demonstrated that the FCM performs well for elasto-plastic loading and unloading.

关键词： finite cell method (FCM) h-version finite element method (h-FeM),Prandtl-Reuss quadtree octree

在线全文

学校读者我要写书评

暂无评论

地球上生命的起源

地球上生命的起源

澳洲塔斯马尼亚霍巴特冬季驯化黄翅澳蜜鸟的代谢率(英文)

作者： S.l.·米勒(S.l. Miller) l.e.·奥吉尔(l.e. Orgel)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

动物学报 2005年第2期51卷 338-343页

作者： l.P.e.Kusuma YUNI R.W.ROSe School of Zoology University of TasmaniaPrivate Bag 5GPO HobartTasmania Australia 7001School of Zoology University of TasmaniaPrivate Bag 5GPO HobartTasmania Australia 7001

在5-40°C温度范围内, 测定了澳大利亚塔斯马尼亚黄翅澳蜜鸟(Phylidonyris novaehollandiae) (平均体重24 .1 ±0. 27 g) 冬季的耗氧量。结果表明, 热中性区是25-35°C。基础代谢率是4. 92 ±0 .14 ml/g. h,分别比lasiewski and Dawson... 详细信息

在5-40°C温度范围内, 测定了澳大利亚塔斯马尼亚黄翅澳蜜鸟(Phylidonyris novaehollandiae) (平均体重24 .1 ±0. 27 g) 冬季的耗氧量。结果表明, 热中性区是25-35°C。基础代谢率是4. 92 ±0 .14 ml/g. h,分别比lasiewski and Dawson (1967) 和Aschoff and Pohl (1970) 基于体重的关于雀型鸟类的期望值高57%和77%。本研究结果同样也比已经报道的分布在澳洲大陆的该物种的代谢率高。

关键词：塔斯马尼亚冬季驯化黄翅澳蜜鸟代谢率澳大利亚

Potential distributional shifts in North America of allelopathic invasive plant species under climate change models

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2022年第1期44卷 11-19页

作者： Anson Wang Anthony e.Melton Douglas eSoltis Pamela SSoltis Department of Biology University of FloridaGainesvilleFL32611USA Florida Museum of Natural History University of FloridaGainesvilleFL32611USA Genetics Institute University of FloridaGainesvilleFL32610USA Biodiversity Institute University of FloridaGainesvilleFL32611USA

Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change *** species are recognized for their ability to modify soil microbial communities and influence ecosystem ***,we focused on six species of allelopathic flowering plants-Ailanthus altissima,Casuarina equisetifolia,Centaurea stoebe ***,Dioscorea bulbifera,lantana camara,and Schinus terebinthifolia-Xhat are invasive in North America and examined their potential to spread further during projected climate *** used Species Distribution Models(SDMs)to predict future suitable areas for these species in North America under several proposed future climate *** and Maxent were used to develop SDMs,estimate current distributions,and predict future areas of suitable climate for each *** with the greatest predicted suitable climate in the future include the northeastern and the coastal northwestern regions of North *** size estimations demonstrate the possibility of extreme range loss for these invasives in the southeastern United States,while new areas may become suitable in the northeastern United States and southeastern *** findings show an overall northward shift of suitable climate during the next few decades,given projected changes in temperature and *** results can be utilized to analyze potential shifts in the distribution of these invasive species and may aid in the development of conservation and management plans to target and control dissemination in areas at higher risk for potential future invasion by these allelopathic species.

关键词： Allelopathy Invasive species Species distribution models ecological niche models Invasion impacts Multi-species assessment