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Remote ischemic conditioning approach for the treatment of ischemic stroke 预览
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作者 Seyed Mohammad Seyedsaadat David F.Kallmes Waleed Brinjikji 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第6期1033-1034,共2页
Stroke is the leading cause of disability and death in North America.There has been growing interest in identifying neuroprotective strategies to reduce ischemic burden in patients with acute ischemic stroke.However,d... Stroke is the leading cause of disability and death in North America.There has been growing interest in identifying neuroprotective strategies to reduce ischemic burden in patients with acute ischemic stroke.However,despite extensive clinical trials,no neuroprotective agent has been found for prevention of ischemic damage.Remote ischemic preconditioning(RIC)is a promising non-invasive strategy that has been proven to provide renal and cardioprotection and has recently found to have a potential broad application in the treatment of neurovascular disease,which has bee linked to its possible effects on the release and activation of endogenous neuroprotective substances against the ischemia/reperfusion injuries in experimental studies.This endogenous neuroprotection might vaccinate neural tissues against effects of acute IR following primary infarction insult.Regardless of the method of RIC administration,through manual or automated blood pressure cuff,RIC procedure is inexpensive and easy to use.Based on the experimental and clinical data,application of RIC avoids possible adverse effects and interactions associated with chemical pharmacological agents.In previous clinical studies RIC was safe and associated with only minor transient adverse effects in few cases,including petechia and minor limb pain,which were mostly resolved shortly after completing the treatment. 展开更多
关键词 PREVENTION TREATMENT REMOTE
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Linear spectral unmixing algorithm for modelling suspendedsediment concentration of ash oods, upper Tekeze River, Ethiopia 预览
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作者 Hagos GGebreslassie Assefa MMelesse +1 位作者 Kevin Bishop Azage GGebremariam 《国际泥沙研究:英文版》 SCIE 2020年第1期79-90,共12页
Flash floods are the highest sediment transporting agent,but are inaccessible for in-situ sampling and have rarely been analyzed by remote sensing technology.Laboratory and field experiments were done to develop linea... Flash floods are the highest sediment transporting agent,but are inaccessible for in-situ sampling and have rarely been analyzed by remote sensing technology.Laboratory and field experiments were done to develop linear spectral unmixing(LSU)remote sensing model and evaluate its performance in simulating the suspended sediment concentration(SSC)in flash floods.The models were developed from continuous monitoring in the laboratory and the onsite spectral signature of river bed sediment deposits and flash floods in the Tekeze River and in its tributary,the Tsirare River.The Pearson correlation coefficient was used to determine the variability of correlations between reflectance and SSCs.The coefficient of determination(R2)and root mean square of error(RMSE)were used to evaluate the performance of the generated models.The results found that the Pearson correlation coefficient between SSCs and reflectance varied based on the level of the SSCs,geological colors,and grain sizes.The performance of the LSU model and empirical remote sensing approaches were computed to be R2?0.92,and RMSE-±0.76 g/l in the Tsirare River and R2-0.91,and RMSE-±0.73 g/l in the Tekeze River and R2?0.81,RMSE-±2.65 g/l in the Tsirare river and R2?0.76,RMSE-±10.87 g/l in the Tekeze River,respectively.Hence,the LSU approach of remote sensing was found to be relatively accurate in monitoring and modeling the variability of SSCs that could be applied to the upper Tekeze River basin. 展开更多
关键词 Empirical remote sensing Flash floods Linear spectral unmixing Suspended sediment concentration Tekeze River
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远程污染自动监测报警物联网通信系统设计
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作者 李万军 《自动化与仪器仪表》 2019年第3期144-146,共3页
在现代通信技术不断发展的过程中,物联网技术被广泛应用到多领域中,并且也为解决现代污染自动检测报警问题提出了全新的思路。基于物联网的远程污染自动监测报警联网通信系统实现传感网、计算机网络及无线网络的相互结合,能够及时监测污... 在现代通信技术不断发展的过程中,物联网技术被广泛应用到多领域中,并且也为解决现代污染自动检测报警问题提出了全新的思路。基于物联网的远程污染自动监测报警联网通信系统实现传感网、计算机网络及无线网络的相互结合,能够及时监测污染,并且还能够同步报警,提高了监测报警可靠性。 展开更多
关键词 远程 污染自动监测报警 物联网 通信系统
Potential Bands of Sentinel-2A Satellite for Classification Problems in Precision Agriculture
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作者 Tian-Xiang Zhang Jin-Ya Su +1 位作者 Cun-Jia Liu Wen-Hua Chen 《国际自动化与计算杂志:英文版》 EI CSCD 2019年第1期16-26,共11页
Various indices are used for assessing vegetation and soil properties in satellite remote sensing applications.Some indices,such as normalized difference vegetation index(NDVI)and normalized difference water index(NDW... Various indices are used for assessing vegetation and soil properties in satellite remote sensing applications.Some indices,such as normalized difference vegetation index(NDVI)and normalized difference water index(NDWI),are capable of simply differentiating crop vitality and water stress.Nowadays,remote sensing capabilities with high spectral,spatial and temporal resolution are available to analyse classification problems in precision agriculture.Many challenges in precision agriculture can be addressed by supervised classification,such as crop type classification,disease and stress(e.g.,grass,water and nitrogen)monitoring.Instead of performing classification based on designated indices,this paper explores direct classification using different bands information as features.Land cover classification by using the recently launched Sentinel-2A image is adopted as a case study to validate our method.Four approaches of featured band selection are compared to classify five classes(crop,tree,soil,water and road)with the support vector machines(SVMs)algorithm,where the first approach utilizes traditional empirical indices as features and the latter three approaches adopt specific bands(red,near infrared and short wave infrared)related to indices,specific bands after ranking by mutual information(MI),and full bands of on-board sensors as features,respectively.It is shown that a better classification performance can be achieved by directly using the selected bands after MI ranking compared with the one using empirical indices and specific bands related to indices,while the use of all 13 bands can marginally improve the classification accuracy than MI based one.Therefore,it is recommended that this approach can be applied for specific Sentinel-2A image classification problems in precision agriculture. 展开更多
关键词 Sentinel-2A REMOTE SENSING image classification supervised learning precision AGRICULTURE
智能电子捕鼠器及远程管理平台的研究 预览
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作者 李慧勤 陈少凡 +1 位作者 谢江林 郑丽榕 《科技创新与应用》 2019年第6期183-184,共2页
本研究为解决目前捕鼠器捕获率低和捕获后无人知晓导致动物死亡,死亡后动物将在捕鼠笼中留下浓密的动物气味将影响第二次的动物捕获。本研究产品智能投放引诱饵料可提高捕鼠成功率,可在捕获同时通过2G/3G/4G蜂窝模组连接至互联网云端,... 本研究为解决目前捕鼠器捕获率低和捕获后无人知晓导致动物死亡,死亡后动物将在捕鼠笼中留下浓密的动物气味将影响第二次的动物捕获。本研究产品智能投放引诱饵料可提高捕鼠成功率,可在捕获同时通过2G/3G/4G蜂窝模组连接至互联网云端,云端物联网平台使用微信公众号平台或者短信以及电话报警,提醒工作人员此捕鼠器的需清理维护。 展开更多
关键词 智能 电子 远程 平台化 长效
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Smart Photogrammetric and Remote Sensing Image Processing for Very High Resolution Optical Images——Examples from the CRC-AGIP Lab at UNB 预览
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作者 Yun ZHANG 《测绘学报(英文版)》 2019年第2期17-26,共10页
This paper introduces some of the image processing techniques developed in the Canada Research Chair in Advanced Geomatics Image Processing Laboratory (CRC-AGIP Lab) and in the Department of Geodesy and Geomatics Engi... This paper introduces some of the image processing techniques developed in the Canada Research Chair in Advanced Geomatics Image Processing Laboratory (CRC-AGIP Lab) and in the Department of Geodesy and Geomatics Engineering (GGE) at the University of New Brunswick (UNB), Canada. The techniques were developed by innovatively/“smartly” utilizing the characteristics of the available very high resolution optical remote sensing images to solve important problems or create new applications in photogrammetry and remote sensing. The techniques to be introduced are: automated image fusion (UNB-PanSharp), satellite image online mapping, street view technology, moving vehicle detection using single set satellite imagery, supervised image segmentation, image matching in smooth areas, and change detection using images from different viewing angles. Because of their broad application potential, some of the techniques have made a global impact, and some have demonstrated the potential for a global impact. 展开更多
关键词 remote sensing optical IMAGE very high resolution pan-sharpening online mapping STREET view moving information DETECTION IMAGE SEGMENTATION IMAGE MATCHING change DETECTION
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Remote sensing and geographic information systems techniques in studies on treeline ecotone dynamics 预览
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作者 Parveen K.Chhetri Eric Thai 《林业研究:英文版》 CAS CSCD 2019年第5期1543-1553,共11页
We performed a meta-analysis on over 100 studies applying remote sensing(RS)and geographic information systems(GIS)to understand treeline dynamics.A literature search was performed in multiple online databases,includi... We performed a meta-analysis on over 100 studies applying remote sensing(RS)and geographic information systems(GIS)to understand treeline dynamics.A literature search was performed in multiple online databases,including Web of Knowledge(Thomson Reuters),Scopus(Elsevier),BASE(Bielefeld Academic Search Engine),CAB Direct,and Google Scholar using treeline-related queries.We found that RS and GIS use has steadily increased in treeline studies since 2000.Spatialresolution RS and satellite imaging techniques varied from low-resolution MODIS,moderate-resolution Landsat,to high-resolution WorldView and aerial orthophotos.Most papers published in the 1990s used low to moderate resolution sensors such as Landsat Multispectral Scanner and Thematic Mapper,or SPOT PAN(Panchromatic)and MX(Multispectral)RS images.Subsequently,we observed a rise in high-resolution satellite sensors such as ALOS,GeoEye,IKONOS,and WorldView for mapping current and potential treelines.Furthermore,we noticed a shift in emphasis of treeline studies over time:earlier reports focused on mapping treeline positions,whereas RS and GIS are now used to determine the factors that control treeline variation. 展开更多
关键词 Digital ELEVATION model GEOGRAPHIC information systems REMOTE sensing TREELINE
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工业APP的远程协同运维系统在铝合金轮毂生产线上的应用
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作者 陈庚 李利清 王世东 《机械设计》 CSCD 北大核心 2019年第A01期336-339,共4页
一般设备制造商很难掌握重型机械设备在用户现场的使用情况,设备一旦出现问题,工程技术人员很难根据用户现场操作人员的描述找到问题的根源并及时有效地排除故障。为了解决上述问题,文中介绍了一种可以应用在铝合金轮毂生产线上的工业AP... 一般设备制造商很难掌握重型机械设备在用户现场的使用情况,设备一旦出现问题,工程技术人员很难根据用户现场操作人员的描述找到问题的根源并及时有效地排除故障。为了解决上述问题,文中介绍了一种可以应用在铝合金轮毂生产线上的工业APP的远程协同运维系统。该系统使用移动互联网实现对用户现场设备的在线监控与管理。 展开更多
关键词 铝合金轮毂生产线 工业APP 远程 运维系统 移动互联网
Mapping potential areas for groundwater storage in theHigh Guir Basin (Morocco): Contribution of remotesensing and geographic information system 预览
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作者 Abderrahime Nouayti Driss Khattach +1 位作者 Mohamed Hilali Nordine Nouayti 《地下水科学与工程:英文版》 2019年第4期309-322,共14页
Identification of water potential areas in arid regions is a crucial element for the enhancement of their water resources and socio-economic development. In fact, water resources system-planning can be used to make va... Identification of water potential areas in arid regions is a crucial element for the enhancement of their water resources and socio-economic development. In fact, water resources system-planning can be used to make various decisions and implement manage- ment of water resources policies. The purpose of this study is to identify groundwater sto- rage areas in the high Guir Basin by implementing Geographic Information System (GIS) and Remote Sensing methods. The required data for this study can be summarized into five critical factors: Topography (slope), lithology, rainfall, rock fracture and drainage. These critical factors have been converted by the GIS into thematic maps. For each cri- tical parameter, a coefficient with weight was attributed according to its importance. The map of potential groundwater storage areas is obtained by adding the products (coeffi- cient × weight) of the five parameters. The results show that 50% to 64% of the total area of the High Guir Basin is potentially rich in groundwater, where most of fracture systems are intensely developed. The obtained results are validated with specific yield of the aqui- fer in the study area. It is noted that there is a strong positive correlation between excel- lent groundwater potential zones with high flows of water points and it diminishes with low specific yield with poor potential zones. 展开更多
关键词 High Guir Basin Groundwater storage Remote Sensing Potential assessment Geographic Information System
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High-throughput phenotyping in cotton: a review 预览
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作者 PABUAYON Irish Lorraine B SUN Yazhou +1 位作者 GUO Wenxuan RITCHIE Glen L 《棉花研究(英文)》 2019年第3期174-182,共9页
Recent technological advances in cotton(Gossypium hirsutum L.) phenotyping have offered tools to improve the efficiency of data collection and analysis.High-throughput phenotyping(HTP) is a non-destructive and rapid a... Recent technological advances in cotton(Gossypium hirsutum L.) phenotyping have offered tools to improve the efficiency of data collection and analysis.High-throughput phenotyping(HTP) is a non-destructive and rapid approach of monitoring and measuring multiple phenotypic traits related to the growth,yield,and adaptation to biotic or abiotic stress.Researchers have conducted extensive experiments on HTP and developed techniques including spectral,fluorescence,thermal,and three-dimensional imaging to measure the morphological,physiological,and pathological resistance traits of cotton.In addition,ground-based and aerial-based platforms were also developed to aid in the implementation of these HTP systems.This review paper highlights the techniques and recent developments for HTP in cotton,reviews the potential applications according to morphological and physiological traits of cotton,and compares the advantages and limitations of these HTP systems when used in cotton cropping systems.Overall,the use of HTP has generated many opportunities to accurately and efficiently measure and analyze diverse traits of cotton.However,because of its relative novelty,HTP has some limitations that constrains the ability to take full advantage of what it can offer.These challenges need to be addressed to increase the accuracy and utility of HTP,which can be done by integrating analytical techniques for big data and continuous advances in imaging. 展开更多
关键词 COTTON HIGH-THROUGHPUT PHENOTYPING Remote sensing SENSORS Spectral Fluorescence Thermal PLATFORMS Aerial-based Ground-based
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Modeling and predicting dengue fever cases in key regions of the Philippines using remote sensing data
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作者 Maria Ruth B.Pineda-Cortel Benjie M.Clemente Pham Thi Thanh Nga 《亚太热带医药杂志:英文版》 SCIE CAS 2019年第2期60-66,共7页
Objective: To correlate climatic and environmental factors such as land surface temperature, rainfall, humidity and normalized difference vegetation index with the incidence of dengue to develop prediction models for ... Objective: To correlate climatic and environmental factors such as land surface temperature, rainfall, humidity and normalized difference vegetation index with the incidence of dengue to develop prediction models for the Philippines using remote-sensing data.Methods: Timeseries analysis was performed using dengue cases in four regions of the Philippines and monthly climatic variables extracted from Global Satellite Mapping of Precipitation for rainfall, and MODIS for the land surface temperature and normalized difference vegetation index from 2008-2015.Consistent dataset during the period of study was utilized in Autoregressive Integrated Moving Average models to predict dengue incidence in the four regions being studied.Results: The best-fitting models were selected to characterize the relationship between dengue incidence and climate variables.The predicted cases of dengue for January to December 2015 period fitted well with the actual dengue cases of the same timeframe.It also showed significantly good linear regression with a square of correlation of 0.869 5 for the four regions combined.Conclusion: Climatic and environmental variables are positively associated with dengue incidence and suit best as predictor factors using Autoregressive Integrated Moving Average models.This finding could be a meaningful tool in developing an early warning model based on weather forecasts to deliver effective public health prevention and mitigation programs. 展开更多
关键词 DENGUE FEVER Climate change REMOTE SENSING data AUTOREGRESSIVE Integrated Moving AVERAGE models
基于LoRa通信的博物馆微环境无线网络系统 预览
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作者 张辉 刘真 张阳 《仪器仪表用户》 2019年第4期1-4,共4页
针对现有的基于Zigbee通信的博物馆微环境无线网络系统功耗高、抗干扰性差的缺点,本文提出了一种基于LoRa通信的博物馆微环境无线网络系统。基于LoRa通信的博物馆微环境无线网络系统通过终端采集温湿度、紫外线、光照强度等信息,网关进... 针对现有的基于Zigbee通信的博物馆微环境无线网络系统功耗高、抗干扰性差的缺点,本文提出了一种基于LoRa通信的博物馆微环境无线网络系统。基于LoRa通信的博物馆微环境无线网络系统通过终端采集温湿度、紫外线、光照强度等信息,网关进行中继,将信息传递给服务器。结果表明,该系统可以起到实时监控以及预警的作用,具有低功耗、远距离、低带宽、覆盖容量大、低成本等优点。 展开更多
关键词 LoRa 博物馆微环境 无线网络系统 低功耗 远距离
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区域公司高一致性电力生产远程实时监控系统的建设及应用 预览
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作者 雷中辉 刘胜先 《电力大数据》 2019年第3期33-38,共6页
基于远程实时监控系统技术和大数据管理理论,某区域分公司在其发电厂(场)信息化建设过程中,建立了一套完全跟发电机组生产监视系统一致的远程监视系统,不仅实现了抓取生产系统中信息的主要数据进行演示和指标统计功能,同时做到了完全远... 基于远程实时监控系统技术和大数据管理理论,某区域分公司在其发电厂(场)信息化建设过程中,建立了一套完全跟发电机组生产监视系统一致的远程监视系统,不仅实现了抓取生产系统中信息的主要数据进行演示和指标统计功能,同时做到了完全远程再现生产过程的实时监视。通过实时的监视发电生产过程,同时融合公司经营在线、燃料调运等信息化管理系统,并结合生产现场重点区域的视频监控,实现了第一时间掌握生产过程的具体细节,为本公司研究生产策略、降低成本、培训提供最直观的平台,助力公司电力生产综合管理水平的再提升。高一致性电力生产远程实时监控系统建设成功后,其良好的应用效果也使其成为了区域分公司展现先进管理思想和管理理念的一张名片,值得其它区域公司甚至是总公司的借鉴和推广。 展开更多
关键词 远程 实时 监控 高一致性 镜像 生产管理
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“齐鲁”转运中心远程转运患者的临床特征
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作者 张建波 张娟娟 +2 位作者 石蕾 陈玉国 徐峰 《中华急诊医学杂志》 CAS CSCD 北大核心 2019年第2期208-213,共6页
目的通过分析"齐鲁"转运中心转运患者的临床特征,探索院间转运新模式,为院间转运体系建设提供理论依据。方法2014年8月至2016年12月转入和转出山东大学齐鲁医院的成年患者258例。采集转运成功患者的性别、年龄、转运指标、改... 目的通过分析"齐鲁"转运中心转运患者的临床特征,探索院间转运新模式,为院间转运体系建设提供理论依据。方法2014年8月至2016年12月转入和转出山东大学齐鲁医院的成年患者258例。采集转运成功患者的性别、年龄、转运指标、改良早期预警评分及结局等临床指标。依据结局将转入患者分为好转组与非好转组,分析两组间上述指标的差异;数值变量分析应用成组t检验或Mann-Whitney非参数检验,分类变量应用χ^2检验,Logistic回归分析60例转入ICU的患者临床指标与结局的相关性。结果"齐鲁"院间转运中心总体转运成功率为98.5%。男性患者明显多于女性患者;前三位转入诊断为神经系统疾病、创伤、循环系统疾病,转出诊断为呼吸系统疾病、循环系统疾病、神经系统疾病;气管插管、气管切开、有创机械通气比例在11.9%~22.2%;转出患者应用血管活性药物比率、深静脉置管比例分别是转入患者的3倍、5倍;81.0%的转入患者、45.5%的转出患者为好转出院;转入好转组与非好转组间年龄、心率、MEWS、住院天数、ICU比例、机械通气比例、气管插管比例差异有统计学意义(P<0.05);转入ICU的患者中,住院时间与好转结局存在相关性(OR=1.213,95%CI=1.085-1.357)。结论"齐鲁"转运中心转运患者成功率和好转率均较高,或可作为院间转运体系建设的新模式。 展开更多
关键词 "齐鲁"模式 转运中心 新模式 院间转运 远程 临床特征 体系建设 理论依据
Overview of Land Use/Cover Change Dynamic Monitoring Methods 预览
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作者 Xue HU Huimin YAN +1 位作者 Haijiang ZHAO Zhiguo LIU 《农业生物技术:英文版》 CAS 2019年第4期140-144,148共6页
With the emergence of global environmental change issues,Land Use/Cover Change(LUCC)issues have received increasing attention.Therefore,the dynamic monitoring of LUCC has also become very important.In this paper,preli... With the emergence of global environmental change issues,Land Use/Cover Change(LUCC)issues have received increasing attention.Therefore,the dynamic monitoring of LUCC has also become very important.In this paper,preliminary exploration was made to the research progress on the dynamic monitoring technologies for LUCC as well as their advantages and disadvantages,and prediction was made to the development trend of future monitoring technology. 展开更多
关键词 LAND use/cover CHANGE DYNAMIC monitoring Environment REMOTE SENSING
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Changes in Global Cloud Cover Based on Remote Sensing Data from 2003 to 2012 预览
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作者 MAO Kebiao YUAN Zijin +3 位作者 ZUO Zhiyuan XU Tongren SHEN Xinyi GAO Chunyu 《中国地理科学:英文版》 SCIE CSCD 2019年第2期306-315,共10页
As is well known,clouds impact the radiative budget,climate change,hydrological processes,and the global carbon,nitrogen and sulfur cycles.To understand the wide-ranging effects of clouds,it is necessary to assess cha... As is well known,clouds impact the radiative budget,climate change,hydrological processes,and the global carbon,nitrogen and sulfur cycles.To understand the wide-ranging effects of clouds,it is necessary to assess changes in cloud cover at high spatial and temporal resolution.In this study,we calculate global cloud cover during the day and at night using cloud products estimated from Moderate Resolution Imaging Spectroradiometer(MODIS)data.Results indicate that the global mean cloud cover from 2003 to 2012 was 66%.Moreover,global cloud cover increased over this recent decade.Specifically,cloud cover over land areas(especially North America,Antarctica,and Europe)decreased(slope=–0.001,R~2=0.5254),whereas cloud cover over ocean areas(especially the Indian and Pacific Oceans)increased(slope=0.0011,R~2=0.4955).Cloud cover is relatively high between the latitudes of 36°S and 68°S compared to other regions,and cloud cover is lowest over Oceania and Antarctica.The highest rates of increase occurred over Southeast Asia and Oceania,whereas the highest rates of decrease occurred over Antarctica and North America.The global distribution of cloud cover regulates global temperature change,and the trends of these two variables over the 10-year period examined in this study(2003–2012)oppose one another in some regions.These findings are very important for studies of global climate change. 展开更多
关键词 GLOBAL CLOUD COVER climate CHANGE REMOTE SENSING MODIS GLOBAL CHANGE
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Scaling out NUMA-Aware Applications with RDMA-Based Distributed Shared Memory
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作者 Yang Hong Yang Zheng +3 位作者 Fan Yang Bin-Yu Zang Hai-Bing Guan Hai-Bo Chen 《计算机科学技术学报:英文版》 SCIE EI CSCD 2019年第1期94-112,共19页
The multicore evolution has stimulated renewed interests in scaling up applications on shared-memory multiprocessors,significantly improving the scalability of many applications.But the scalability is limited within a... The multicore evolution has stimulated renewed interests in scaling up applications on shared-memory multiprocessors,significantly improving the scalability of many applications.But the scalability is limited within a single node;therefore programmers still have to redesign applications to scale out over multiple nodes.This paper revisits the design and implementation of distributed shared memory (DSM)as a way to scale out applications optimized for non-uniform memory access (NUMA)architecture over a well-connected cluster.This paper presents MAGI,an efficient DSM system that provides a transparent shared address space with scalable performance on a cluster with fast network interfaces.MAGI is unique in that it presents a NUMA abstraction to fully harness the multicore resources in each node through hierarchical synchronization and memory management.MAGI also exploits the memory access patterns of big-data applications and leverages a set of optimizations for remote direct memory access (RDMA)to reduce the number of page faults and the cost of the coherence protocol.MAGI has been implemented as a user-space library with pthread-compatible interfaces and can run existing multithreaded applications with minimized modifications.We deployed MAGI over an 8-node RDMA-enabled cluster.Experimental evaluation shows that MAGI achieves up to 9.25:4 speedup compared with an unoptimized implementation,leading to a sealable performance for large-scale data-intensive applications. 展开更多
关键词 distributed shared MEMORY (DSM) SCALABILITY multieore evolution NON-UNIFORM MEMORY ACCESS (NUMA) remote direct MEMORY ACCESS (RDMA)
船载远程电子通信设备异常信号识别方法 预览
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作者 刘雪春 《舰船科学技术》 北大核心 2019年第8期163-165,共3页
传统的船载远程电子通信设备异常信号识别方法存在着识别性能差的缺陷,为此提出船载远程电子通信设备异常信号识别方法研究。利用比较判别法对采集的船载远程电子通信设备信号进行判别,对异常信号特征进行提取并组成异常信号特征集合,... 传统的船载远程电子通信设备异常信号识别方法存在着识别性能差的缺陷,为此提出船载远程电子通信设备异常信号识别方法研究。利用比较判别法对采集的船载远程电子通信设备信号进行判别,对异常信号特征进行提取并组成异常信号特征集合,以异常信号特征集合为依据采用异常信号识别算法对异常信号进行识别,实现了船载远程电子通信设备异常信号的识别。通过实验得到,提出的船载远程电子通信设备异常信号识别方法识别正确率比传统方法高出24%,说明提出的船载远程电子通信设备异常信号识别方法具备更好的识别性能。 展开更多
关键词 船载 远程 电子通信设备 异常信号 识别
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A study of the spatial-temporal distribution and propagation characteristics of internal waves in the Andaman Sea using MODIS 预览
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作者 Lina Sun Jie Zhang Junmin Meng 《海洋学报:英文版》 SCIE CAS CSCD 2019年第7期121-128,共8页
This paper describes investigations of the internal waves in the Andaman Sea using Moderate Resolution Imaging Spectroradiometer(MODIS)imagery over the period of June 2010 to May 2016.Results of the spatial and tempor... This paper describes investigations of the internal waves in the Andaman Sea using Moderate Resolution Imaging Spectroradiometer(MODIS)imagery over the period of June 2010 to May 2016.Results of the spatial and temporal distribution,generation sources and propagation characteristics of internal waves are presented.The statistical analysis shows that internal waves can be observed in almost the entire area of the Andaman Sea.Most internal waves are observed in the northern,central and southern regions of the Andaman Sea.A significant number of internal waves between 7°N and 9°N in the East Indian Ocean are also observed.Internal waves can be observed year-round in the Andaman Sea,while most of internal waves are observed between February and April,with a maximum frequency of 15.03%in March.The seasonal distribution of the internal waves shows that the internal waves have mostly been observed in the dry season(February to April),and fewer internal waves are observed in the rainy season(May to October).The double peak distribution for the occurrence frequency of internal waves is found.With respect to the lunar influence,more internal waves are observed after the spring tide,which implies the spring tide may play an important role in internal wave generation in the Andaman Sea.Generation sources of internal waves are explored based on the propagation characteristics of internal waves.The results indicate that six sources are located between the Andaman Islands and the Nicobar Islands,and one is located in the northern Andaman Sea.Four regions with active internal wave phenomenon in the Andaman Sea were presented during the MODIS survey,and the propagation speed of internal waves calculated based on the semidiurnal generation period is smaller than the results acquired from pairs of the images with short time intervals. 展开更多
关键词 INTERNAL WAVES REMOTE SENSING Andaman SEA MODIS
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Perspectives on mechanisms underlying remote ischemic conditioning against ischemic stroke 预览
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作者 Changqing Xia Xunming Ji 《转化神经科学电子杂志(英文)》 2019年第1期1-14,共14页
Ischemic stroke is a major neurological disease with limited effective therapeutic options except for thrombolysis and thrombectomy. Remote ischemic conditioning (RIC) is an approach that promises an alternative to th... Ischemic stroke is a major neurological disease with limited effective therapeutic options except for thrombolysis and thrombectomy. Remote ischemic conditioning (RIC) is an approach that promises an alternative to the current treatment portfolio. As an easy-handled, non-invasive regimen, it takes advantage of transient ischemia (currently often made through inflation and deflation of limb blood pressure cuff) to enhance the tolerance of vital organs to ischemia. RIC can be executed before, during and after the onset of stroke. The mechanisms of action of RIC employed at different stroke stages are similar and may involve humoral, neurological and inflammatory pathways. As new mechanisms underlying RIC-induced neuroprotection continue to be revealed, we review in this article some of the latest development in this field, including:① RIC and RIC-induced fundamental change, hypoxia, as well as the role of hypoxia inducible factors against stroke;② Potential role of RIC-induced extracellular vesicles in neuroprotection;③ RIC-induced metabolic changes in tissue protection;④ Potential effect of RIC on red blood cells (RBC) oxygen delivery;and ⑤ RIC and its anti-inflammatory potential. 展开更多
关键词 REMOTE ISCHEMIC CONDITIONING (RIC) stroke hypoxia INDUCIBLE factors (HIF) EXOSOME oxygen delivery inflammation metabolomics microRNA
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