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Search Results: 1 - 10 of 65150 matches for " Liang-neng Wu "
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Conversion of entanglement between continuous variable and qubit systems
Xiao-yu Chen,Liang-neng Wu,Li-zhen Jiang,Ya-zhuo Li
Physics , 2006,
Abstract: We investigate how entanglement can be transferred between continuous variable and qubit systems. We find that a two-mode squeezed vacuum state and a continuous variable Werner state can be converted to the product states of infinitive number of two-qubit states while keeping the entanglement. The reverse process is also possible.
Optimal concentration of active particles in four-level and quasi-four-level laser systems
四能级和准四能级激活离子的最佳掺杂浓度

Hu Xiao,Hong Fang-Yu,Wu Liang-Neng,
胡晓
,洪方煜,邬良能

物理学报 , 2002,
Abstract: 推导了在连续抽运和脉冲抽运条件下,利用荧光衰减曲线,在双掺与单掺晶体中,激发态布居数与激活离子掺杂浓度的关系,分析了四能级系统与准四能级系统中激活离子最佳掺杂浓度的计算方法.并利用上述方法,以准四能级系统Tm,Tb:LiYF4和四能级系统Nd:YAG为例,计算了相应离子的最佳掺杂浓度,并与文献的有关报道进行了比较
The separability of two-mode Gaussian state under amplification and symmetric damping
Chen Xiao-Yu,Jiang Li-Zhen,Wu Liang-Neng,
陈小余
,蒋丽珍,邬良能

中国物理 B , 2007,
Abstract: The performances of a two-mode Gaussian state under parametric amplification, symmetric amplitude damping and thermal noise are studied. The time-dependent complex correlation matrix of the state in evolution is given. The separability of the final two-mode Gaussian state is examined under symmetric amplification and asymmetric amplification separately.
Growth mechanism and ordered structures of iron films sputter-deposited on silicone oil surfaces
硅油基底表面铁薄膜的生长机理及表面有序结构

Zhang Yong-Ju,Yu Sen-Jiang,Ge Hong-Liang,Wu Liang-Neng,Cui Yu-Jian,
张永炬
,余森江,葛洪良,邬良能,崔玉建

物理学报 , 2006,
Abstract: 利用直流溅射方法在液体基底(硅油)表面成功制备出金属铁薄膜系统,研究了其生长机理及特征的表面有序结构.实验发现铁薄膜的生长过程与液相基底表面非磁性金属薄膜的情况类似,基本服从二阶段生长模型.连续铁薄膜中可观测到尺寸巨大的圆盘形有序结构,其生长演化与溅射功率、沉积时间和真空环境中的生长时间等实验条件密切相关.实验证明,此类有序结构是在薄膜内应力作用下,铁原子及原子团簇在液体表面自由扩散迁移,并最终在硅油基底表面某些区域成核凝聚所致.在较大溅射功率和沉积时间条件下,圆盘外部区域的铁薄膜中形成周期分布的波纹褶皱,其波长约为10 μm,波峰基本与圆盘的边界平行.进一步研究表明:在沉积过程中,由于沉积铁原子的局域能量作用,导致硅油的表面层结构发生改变而形成一聚合物层;在随后的冷却过程中,聚合物层的强烈收缩使铁薄膜处于很大的压应力场中,促使薄膜起皱形成波纹结构.
On Open Problems of Nonnegative Inverse Eigenvalues Problem  [PDF]
Jun-Liang Wu
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.14025
Abstract: In this paper, we give solvability conditions for three open problems of nonnegative inverse eigenvalues problem (NIEP) which were left hanging in the air up to seventy years. It will offer effective ways to judge an NIEP whether is solvable.
Protecting Labor Rights in Globalization: A Study on Labor Law Implement in China  [PDF]
Qiuxian Liang, Weidong Wu
Advances in Applied Sociology (AASoci) , 2018, DOI: 10.4236/aasoci.2018.812043
Abstract: This paper employs the data from a survey conducted in Shanghai and other nine cities and uses the Logistic Regression Model to analyze it, from the perspectives of globalization. The study finds that the race to the bottom among employers may affect the behavior change of individual under laws intervention and then affect the action result of labor law’s article on labor contract signing, minimum wage and basic pension plan participation.
Safety Control Technology of Deepwater Perforated Gas Well Testing  [PDF]
Hao Liang, Muwang Wu
Engineering (ENG) , 2019, DOI: 10.4236/eng.2019.113011
Abstract: Due to the high difficulties, high investment, and high risks in deepwater oil and gas well testing, major safety problems can occur easily. A key to prevent accidents is to conduct safety assessment and control on deepwater testing and to improve the testing technology. The deepwater of the South China Sea has some special environmental features: long distance from offshore, frequent typhoons in summer and constant monsoons in winter, and the presence of sandy slopes, sandy ridges and internal waves, coupled with the complex properties of oil and gas reserves which bring more challenges to deepwater well testing. In combination with deepwater well testing practice in the South China Sea, this paper analyzes the main potential risks in deepwater well testing and concludes that there are risks of failures of testing string, tools, and ground processes. Other risks are gas hydrate blockage, reservoir stratum sanding, and typhoon impacts. Specific precautions are also proposed in response to these risks in the paper.
人機互動設計與網路互動機制之整合論 The Integrated Perspective of Human-computer Interaction Design and Internet Interaction Mechanism Development
Chaoyun Chaucer Liang,Neng-haoYu
Journal of Educational Media & Library Sciences , 2002,
Abstract: 無 Internet users oftentimes feel frustrated because of the impolitic function or complicated structure design of web sites. On the basis of the study of Human-Computer Interaction (HCI), this paper analyzes the development of Internet interaction mechanism from both perspectives of the front-end user environment and the back-end server programming. By integrating the HCI study with the development of web interaction techniques, the authors find that a good web user interface must not only consider usability and accessibility design, but also a suitable adoption to the information architecture, its graphics, and the technical arrangement of a given system.
Convergence rate and concentration inequalities for Gibbs sampling in high dimension
Neng-Yi Wang,Liming Wu
Statistics , 2014, DOI: 10.3150/13-BEJ537
Abstract: The objective of this paper is to study the Gibbs sampling for computing the mean of observable in very high dimension - a powerful Markov chain Monte Carlo method. Under the Dobrushin's uniqueness condition, we establish some explicit and sharp estimate of the exponential convergence rate and prove some Gaussian concentration inequalities for the empirical mean.
Scaling Properties of Urban Facilities
Liang Wu
Physics , 2014, DOI: 10.1103/PhysRevE.90.062808
Abstract: Two measurements are employed to quantitatively investigate the scaling properties of the spatial distribution of urban facilities, the K function by number counting and the variance-mean relationship with the method of expanding bins. The K function and the variance-mean relationship are both power functions. It means that the spatial distribution of urban facilities are scaling invariant. Further analysis of more data (which includes 8 types of facilities in 37 major Chinese cities) shows that the exponents of the power function do not have systematic variations across facilities and cities, which suggests the possibility that the scaling rule is universal. A double stochastic process (DSP) model is proposed such that the two empirical results can both be embedded. Simulation of DSP yields better agreement with the urban data than of the correlated percolation model.
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