中国科学技术大学学报最新文献_第7页

τ K s π - v τ and τ K - ηV τ decays: A combined analysis τ K s π - v τ和τ K - ηV τ衰减:一个联合分析

Journal of University of Science and Technology of China Pub Date : 2016-05-01 DOI: 10.3969/j.issn.0253-2778.2016.05.007

R. Escribano

引用次数: 0

Post stroke examination with evoked and voluntary surface EMG: A study with hypothenar muscles 脑卒中后诱发和随意表面肌电图检查:鱼际下肌的研究

Journal of University of Science and Technology of China Pub Date : 2014-01-01 DOI: 10.3969/J.ISSN.0253-2778.2014.05.010

Bo Yao, Xiaoyan Li, Yuwen Ruan, P. Zhou

引用次数: 0

Design of superresolved phase plates 超分辨相板的设计

Journal of University of Science and Technology of China Pub Date : 2006-12-01 DOI: 10.2961/JLMN.2006.03.0025

Youhua Tan, Rui Guo, Shizhou Xiao, G. Cheng, Wenhao Huang, Precision Instrumentation

{"title":"Design of superresolved phase plates","authors":"Youhua Tan, Rui Guo, Shizhou Xiao, G. Cheng, Wenhao Huang, Precision Instrumentation","doi":"10.2961/JLMN.2006.03.0025","DOIUrl":"https://doi.org/10.2961/JLMN.2006.03.0025","url":null,"abstract":"Diffraction limit is always a key point to almost all optical systems, and diffraction effect is mostly dependent on the numerical aperture of objective and wavelength of light. However, it will be ultimately limited to improve the resolution continuously by increasing the numerical aperture or reducing the wavelength. Here, it is introduced that when these two parameters are fixed, focal spot smaller than Airy pattern could be obtained by means of superresolution techniques. Theoretical analysis for superresolution is presented. Binary phase plates corresponding to transverse or axial superresolution are designed, especially three-dimensional superresolution is proposed employing some optimization algorithms. The simulation results show that for light source with single wavelength or narrow spectral width, superresolution effects are fine, and when the superresolved phase plates are applied to femtosecond laser microfabrication system, the superresolution performances are even better when two-photon absorption is considered. Finally, the influences of spectrum of light sources are discussed. It has been demonstrated that when the spectral width is narrow, the performance of superresolved phase plates is approximately the same as that of a single wavelength. In conclusion, the superresoloved phase plates can be successfully applied to femtosecond laser systems for microfabrication, data memory and et al.","PeriodicalId":17548,"journal":{"name":"Journal of University of Science and Technology of China","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82817940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Cross-layer adaptive wireless resource allocation scheme 跨层自适应无线资源分配方案

Journal of University of Science and Technology of China Pub Date : 2006-01-01 DOI: 10.1049/cp:20051451

Zhou Wu-yang

{"title":"Cross-layer adaptive wireless resource allocation scheme","authors":"Zhou Wu-yang","doi":"10.1049/cp:20051451","DOIUrl":"https://doi.org/10.1049/cp:20051451","url":null,"abstract":"A new cross-layer adaptive resource allocation scheme for real-time services under a time-varying fading wireless communication system was proposed,in considevation of not only the random service arrival,limited buffers and QoS requirements at MAC layer,but also the wireless channel characteristics,and end-to-end system performance was improved the thanks to adaptive process.The algorithm(CLARA) was composed of two parts:adaptive scheduling and adaptive subcarrier-power allocation.The adaptive scheduling controlled the order in which packets from different users were served according to traffic QoS requirements,such as packet delay,buffer status as well as CSI.The second part dynamically allocated subcarriers and the corresponding transmission power to users according to scheduling results,traffic QoS requirements,such as BER and the BS power constraint.Thus,the system performance could be improved by sufficient exploiting of time diversity,frequency diversity and multiuser diversity.Simulation results show that the CLARA algorithm has about 7dB gain when the throughput,which was defined as successfully received packets in a frame,began to stablize compared to fixed subcarrier-power allocation.The performance of normalized packet delay,which was defined as the ratio of total packets delayed in simulation with the total simulation times,was also significantly improved by the algorithm.","PeriodicalId":17548,"journal":{"name":"Journal of University of Science and Technology of China","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74285198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3-D Profile Parallel Detecting System Based on Differential Confocal Microscopy 基于差示共聚焦显微镜的三维轮廓平行检测系统

Journal of University of Science and Technology of China Pub Date : 2003-01-01 DOI: 10.4028/0-87849-977-6.501

Wang Yong

引用次数: 0