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Search Results: 1 - 10 of 27881 matches for " Liangli Ma "
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Perturbation-Based Schemes with Ultra-Lightweight Computation to Protect User Privacy in Smart Grid
Wei Ren,Liangli Ma,Yi Ren
International Journal of Distributed Sensor Networks , 2013, DOI: 10.1155/2013/230140
How to Authenticate a Device? Formal Authentication Models for M2M Communications Defending against Ghost Compromising Attack
Wei Ren,Linchen Yu,Liangli Ma,Yi Ren
International Journal of Distributed Sensor Networks , 2013, DOI: 10.1155/2013/679450
The research of component- based software testing technique

Ma LiangLi,Lu YanSheng,Liu MengRen,

计算机系统应用 , 2005,
Abstract: 1 引言 过去的几十年,软件开发模式发生了很大的改 变。随着软件开发机构对开发成本、周期要求的提 高,产生了软件构件化。 软件构件技术的提出解决了面向对象技术无法 使大量结构相似的应用程序结构得到重用的矛盾。 因此构件技术对软件重用和集成具有非常重大的意 义,已成为当前软件领域主流技术和研究热点。
Locally linear representation for subspace learning and clustering
Liangli Zhen,Zhang Yi,Xi Peng,Dezhong Peng
Computer Science , 2013,
Abstract: It is a key to construct a similarity graph in graph-oriented subspace learning and clustering. In a similarity graph, each vertex denotes a data point and the edge weight represents the similarity between two points. There are two popular schemes to construct a similarity graph, i.e., pairwise distance based scheme and linear representation based scheme. Most existing works have only involved one of the above schemes and suffered from some limitations. Specifically, pairwise distance based methods are sensitive to the noises and outliers compared with linear representation based methods. On the other hand, there is the possibility that linear representation based algorithms wrongly select inter-subspaces points to represent a point, which will degrade the performance. In this paper, we propose an algorithm, called Locally Linear Representation (LLR), which integrates pairwise distance with linear representation together to address the problems. The proposed algorithm can automatically encode each data point over a set of points that not only could denote the objective point with less residual error, but also are close to the point in Euclidean space. The experimental results show that our approach is promising in subspace learning and subspace clustering.
The Equitable Total Chromatic Number of Some Join graphs  [PDF]
Gang MA, Ming MA
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24B023
Abstract: A proper total-coloring of graph G is said to be?equitable if the number of elements (vertices and edges) in any?two color classes differ by at most one, which the required?minimum number of colors is called the equitable total chromatic?number. In this paper, we prove some theorems on equitable?total coloring and derive the equitable total chromatic numbers?of Pm V?Sn, Pm V?Fn and Pm V Wn.
Improvements and Generalizations of Stochastic Knapsack and Multi-Armed Bandit Approximation Algorithms: Full Version
Will Ma
Computer Science , 2013,
Abstract: The multi-armed bandit (MAB) problem features the classical tradeoff between exploration and exploitation. The input specifies several stochastic arms which evolve with each pull, and the goal is to maximize the expected reward after a fixed budget of pulls. The celebrated work of Gittins et al. [GGW89] presumes a condition on the arms called the martingale assumption. Recently, A. Gupta et al. obtained an LP-based 1/48-approximation for the problem with the martingale assumption removed [GKMR11]. We improve the algorithm to a 4/27-approximation, with simpler analysis. Our algorithm also generalizes to the case of MAB superprocesses with (stochastic) multi-period actions. This generalization captures the framework introduced by Guha and Munagala in [GM07a, GM07b], and yields new results for their budgeted learning problems. Also, we obtain a (1/2-eps)-approximation for the variant of MAB where preemption (playing an arm, switching to another arm, then coming back to the first arm) is not allowed. This contains the stochastic knapsack problem of Dean, Goemans, and Vondrak [DGV08] with correlated rewards, where we are given a knapsack of fixed size, a set of jobs each with a joint distribution for its size and reward, and the objective is to maximize expected reward before the knapsack size is exhausted. Our (1/2-eps)-approximation improves the 1/16 and 1/8 approximations of [GKMR11] for correlated stochastic knapsack with cancellation and no cancellation, respectively, providing the first tight algorithm for these problems that matches the integrality gap of 2. We sample probabilities from an exponential-sized dynamic programming solution, whose existence is guaranteed by an LP projection argument. We hope this technique can also be applied to other dynamic programming problems which can be projected down onto a small LP.
Liouville Type Theorems for Lichnerowicz Equations and Ginzburg-Landau Equation: Survey  [PDF]
Li Ma
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.13022
Abstract: In this survey paper, we firstly review some existence aspects of Lichnerowicz equation and Ginzburg-Landau equations. We then discuss the uniform bounds for both equations in Rn. In the last part of this report, we consider the Liouville type theorems for Lichnerowicz equation and Ginzburg-Landau equations in Rn via two approaches from the use of maximum principle and the monotonicity formula
Simulation on SO2 and NOX Emission from Coal–Fired Power Plants in North-Eastern North America  [PDF]
Shuangchen Ma
Energy and Power Engineering (EPE) , 2010, DOI: 10.4236/epe.2010.23028
Abstract: MM5-SMOKE-CMAQ regional air quality modeling system was used to simulate pollutants emission from coal–fired power plants in North-Eastern North America. The effects of SO2 and NOX on air quality producing from coal-fired power plants in the summer of 2001 were analyzed. Simulations show the contributions of SO2 and NOX emission from coal-fired power plants using different scenarios, coal-fired power plants from US and Canada contribute 67.2% and 32.8% for total SO2 concentration, 17.6% and 6.0% for total NOX concentration in researched domain. Some control measures for coal-fired power plants were discussed. Further controls for the emissions of SO2 and NOX from coal-fired power plants are necessary to reduce the adverse environmental effects.
The Theory of Vector-Valued Function in Locally Convex Space  [PDF]
Lixin Ma
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.38133
Abstract: In this paper, the vector-valued regular functions are extended to the locally convex space. The residues theory of the functions in the locally convex space is achieved. Thereby the Cauchy theory and Cauchy integral formula are extended to the locally convex space.
Research of Extent of Well Control of Explored Reserves of Lithologic Deposit in Delta Front Area  [PDF]
Ma Dong
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.24B050
Abstract: Recently the explored reserves submitted in the oil field mainly situate at the end of deposit in delta front area. During the exploitation and production, problems mainly show on lithologic deposit, for example, reserves are low and difficulty of producing is huge. Based on results of sand body dissection of dense well network of developed oil deposit, and combined with explored reserves, this article researches a relation between extent of well control and reserves precision of explored reserves of lithologic deposit in delta front area by well diluted method. This article has significant influence on objectively understanding our unexploited reserves
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