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Search Results: 1 - 10 of 147524 matches for " Meng Li-Min "
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Investigation on the hydrodynamics of slab x-ray laser plasma by nonuiform line focused laser irradiation

Cheng Tao,Li Ying-Jun,Meng Li-Min,Li Xi-Bo,

中国物理 B , 2011,
Abstract: Based on the two-dimensional model, this paper compares the hydrodynamics of slab x-ray laser plasma produced by different nonuniform line focused irradiations. It finds that the average intensity and the duration of laser pulse and the overall shape of the intensity distribution in the focal line have different influences on the plasma. Calculations show that the evolution of temperature variation is more sensitive to the pulse duration and the electron density variation is more sensitive to the pulse intensity. Pulses with duration of 200 ps to 500 ps and with intensity of 0.2 TW/cm2 to 1.0 TW/cm2 are proved acceptable in slab x-ray lasers.
Relative entropy of entanglement of a kind of two qubit entangled states
Xiao-yu Chen,Li-min Meng,Li-zhen Jiang,Xiang-jun Li
Physics , 2005, DOI: 10.1088/0256-307X/22/11/008
Abstract: We in this paper strictly prove that some block diagonalizable two qubit entangled state with six none zero elements reaches its quantum relative entropy entanglement by the a separable state having the same matrix structure. The entangled state comprises local filtering result state as a special case.
Non-uniform Influence of Prepulse Duration on a Nickel-Like Mo X-Ray Laser in XLIII

CHENG Tao,LI Ying-Jun,MENG Li-Min,ZHANG Jie,

中国物理快报 , 2009,
Abstract: An experiment on a transient nickel-like Mo x-ray laser in the extreme light III (XL III) laser facility is analyzed, based on the two-dimensional hydrodynamic evolutions of a plasma under a non-uniform incident laser. Influences of the pulse duration and intensity on plasma scale length, electron density, temperature, as well as their distributions are investigated, based on which the pre-pulse character and delay time are determined according to the parameters of laser line focus on XLIII. It is found that the optimal intensity of the pre-pulse is 1.0TW/cm2 with a duration of 500ps; a well modified pre-plasma can be obtained after 1.6ns under low quality line focus in the lab.
Make One-The New Architecture and the Value Potentiality of Universal Electronic Equipment based on Software Function Components
Make One——基于软件功能构件的通用信息设备模式及其价值潜力研究

MENG Li-min,ZHOU Xian-zhong,
孟利民
,周献中

系统工程理论与实践 , 2007,
Abstract: First,it was pointed out and analyzed that the stacking and the characteristic for doing not vary with space-time between equipment and its function in the traditional architecture.Second,based on the idea of software function component for information equipment,the new architecture was proposed called after Make One architecture with the equipment and its function to be separated each other and to be reload-able.The architecture of Make One equipment was discussed.And the embedded scheme was proposed for Make One architecture with component-container.The system of application services was discussed for Make One architecture in internet.In the end,basing the model of application function value for the equipment,main respects were analyzed about the value potentiality of Make One architecture.Mathematics programming was concluded for the value potentiality.Expert-marks method and MATLAB fmincon were used,one group parameter was predicted and the value potentiality was analyzed.
Implementation and Comparison of the License Plate Algorithms: A Case Study
Zhi-Jiang Xu,Sheng-Feng Yu,Hui Wang,Li-Min Meng
Information Technology Journal , 2013,
Abstract: License plate location is a critical part in the license plate detection and recognition system. It is sensitive to weather, illumination and the size of license plate. A variety of license plate location algorithms is proposed, which have limited adaptability. In order to resolve the above mentioned problem, this study improves the image preprocessing, image filtering and discrimination of pseudo-regions in 6 different algorithms based on the corner detection, on wavelet transform, on HSV color space, on RGB color space, on license plate texture and on the integrated features of license plate respectively. The experiments show that the improved algorithms have strong robust.
An Improved TFRC Scheme for Wired/Wireless Hybrid Networks
Zhi-Jiang Xu,Shui-Qin Chu,Yuan Wu,Li-Min Meng
Information Technology Journal , 2013,
Abstract: TFRC (TCP (Transmission Control Protocol) Friendly Rate Control) has been widely used in wired networks for its enhanced friendliness and fairness. However, TFRC cannot distinguish between packet losses due to network congestion and those due to wireless link error in wireless networks. Thus, in this study an improved TFRC scheme that is able to differentiate between congestion losses and wireless link error losses for wired/wireless hybrid network is proposed. Specifically, the improved TFRC scheme utilizes the information of the one-way delay to regulate the transmission rate at the sender and simulation experimental results show this strategy is effective and performs much better than the traditional TFRC.
步著歷史的軌跡探索圖書館學與資訊科學教育的問題(下) Uncovering Some Problems in the Library and Information Science Education by Following the Footstep of History (final)
Li-min Cheng
Journal of Educational Media & Library Sciences , 1994,
Abstract: 無 無
人文學者搜尋資訊行為的探究 Information-Seeking Behavior of the Humanists
Li-min Cheng
Journal of Educational Media & Library Sciences , 1992,
Abstract: 無 Information-seeking behavior is one of the important themes of users studies. The humanists information-seeking behavior is quite different from those of scientists of social scientists mainly because they work alone, are concerned with those human achievements which make up our cultural heritage and rarely do their research work under the pressure of time. Books are the material the humanists use most often. Whatever the published year or language. Therefore they are very much dependent on the collections of the library. The way they seek information is first searching the reference bibliographies listed in the books or journal articles. Or simply browsing in the library. Because the databases of the humanities are quite few and the years of coverage are not enough the humanists do not regard the information retrieval system as being useful. Realizing the information-seeking behavior of the humanists the librarians have to make some adjustments in acquisition allocation and user services. Librarians in Taiwan should do more extensive users studies so that they might provide more suitable services and collections to different users.
近20年臺灣地區圖書館學與資訊科學期刊論文引用參考文獻特性分析(下) Characteristics of Cited References in the Journal Articles of Library and Information Science in Taiwan from 1974 to 1993(final)
Li-min Cheng
Journal of Educational Media & Library Sciences , 1994,
Abstract: 無 無
步著歷史的軌跡探索圖書館學與資訊科學教育的問題 Uncovering Some Problems in the Library and Information Science Education by Following the Footstep of History
Li-min Cheng
Journal of Educational Media & Library Sciences , 1993,
Abstract: 無 This article discusses the causes of library/information science not being recognized as a profession and some problems associated with the library/informationscience education, based on the history of American library/information scienceeducation. Since Melvil Dewey founded the first library school in 1887 certainproblems in the library/information science education have persisted, these includeconfusing the objectives of a vocation with those of a profession, no consistentcourse contents in teaching, and the duration for study being too short.Fundamental problems such as lack of theoretical foundation and philosophy, notmuch academic research, and the imbalance of practice and theory in the educationprogram, are yet unresolved. What are the causes for the slow progress in library and information scienceover the past one hundred years? Librarians and library educators together haveto figure these out from the library history, and seek solutions. If we can't be sureof our objective, whether moving to professional model or academic model, and discard vocalionalization totally, then we can never achieve the professional status.
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