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Search Results: 1 - 10 of 143373 matches for " Liang Li "
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A Review of Accountability Audit  [PDF]
Liang Li
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.93029
Abstract:
In the report of the Third Plenary Session of the 18th Central Committee, it was clearly stated that the implementation of the accountability audit, speeding up the construction of ecological civilization, strengthening the responsibility for environmental protection, and establishing an accountability system for environmental protection. The accountability audit is a new extension of government audit in the function of state governance, which plays an important institutional role in regional environmental governance and has a deterrent effect on government officials in various regions. The main purpose of this paper is to review the theoretical basis of the accountability audit, to explore the mechanism principle of the accountability audit and the analysis of the accountability audit by the analysts. The conclusion is that the accountability audit is a new development of the national audit function, and providing a supervisory role in natural resources and the natural environment.
Emotional Labor between Supervisors and Subordinates: Literature Review and Future Research  [PDF]
Meng Li, Linli Liang
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.41015
Abstract: This paper discusses the trend of the emotional labor research object from the external customers to the internal customers of the organization, and separately reviews the study of subordinates’ emotional labor on supervisors and the study of supervisors’ emotional labor on subordinates. Finally, the paper identifies several future research directions, including the measurement of emotional labor between supervisors and subordinates, the research of the relationship between positive leadership behavior and subordinates’ emotional labor, and the integrated research between supervisors’ and subordinates’ emotional labor.
Improved Video Moving Target Tracking Based on Camshift  [PDF]
Liang Li, Yi Luo
American Journal of Computational Mathematics (AJCM) , 2016, DOI: 10.4236/ajcm.2016.64035
Abstract: Focusing on the failure under the condition of target blocking, the similarity between target color and background color for the Camshift algorithm, an improved algorithm based on Camshift algorithm is proposed. Gaussian mixture model is used to determine the tracking area fast and accurately because it is not sensitive to the external conditions such as light and shadow. Kalman predictor is used to predict the blocked target effectively. The video is processed in the MATLAB environment. The moving target can be tracked and its position can be predicted accurately with the proposed improved algorithm. The results verify the feasibility and effectiveness of the algorithm.
Understanding Self-Regulated Learning within an EFL Online Formative Assessment Module  [PDF]
Li Liang, Manzhen Yang
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.58026
Abstract: Assisted with innovative internet and computer techniques, we have launched a new game-based online formative assessment reform in GDUFS in recent years. Self-regulated learning (SRL) is one of the central parts of online formative assessment and well-worth an in-depth study. But it is noted that some essential issues of formative assessment remain rarely touched yet, such as the relations among the four variables of SRL motivational strategies in the game-based blended formative assessment module. Given the above question mentioned, this paper reports a case study of SRL in an online blended formative assessment module in the context of non-English-major college English learning. The intent of the present research is to exemplify how SRL, an active area in educational psychology, can help to illustrate and understand the mechanism and correlations of the variables of SRL motivational strategies in the online formative assessment environment.
Predicting Individual Phase Current in Couple Inductor Based Voltage Regulators (VRs)  [PDF]
Xiaoguo Liang, Yuan-Liang Li
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34011
Abstract:

Coupled inductor is one appealing technology to improve transient response and reduce output decoupling significantly in interleaved multi-phase voltage regulators (VRs). One known problem is that there is no mature solution yet to sense the individual phase current accurately in a lossless way for couple inductor based VRs design. This will impact VR some normal function in one phase mode. This paper proposes a new solution to this problem and simulation is conducted to verify effectiveness of the proposal.

Finite-Time Boundedness for a Class of Delayed Markovian Jumping Neural Networks with Partly Unknown Transition Probabilities
Li Liang
Abstract and Applied Analysis , 2014, DOI: 10.1155/2014/597298
Abstract: This paper is concerned with the problem of finite-time boundedness for a class of delayed Markovian jumping neural networks with partly unknown transition probabilities. By introducing the appropriate stochastic Lyapunov-Krasovskii functional and the concept of stochastically finite-time stochastic boundedness for Markovian jumping neural networks, a new method is proposed to guarantee that the state trajectory remains in a bounded region of the state space over a prespecified finite-time interval. Finally, numerical examples are given to illustrate the effectiveness and reduced conservativeness of the proposed results. 1. Introduction Over the past decades, delayed neural networks have been successfully applied in the pattern recognition, signal processing, image processing, and pattern recognition problems. However, these successful applications mostly rely on the dynamic behaviors of delayed neural networks and some of these applications are dependent on stability of the equilibria of neural networks. Up to now, there have been a large number of results related to dynamical behaviors of delayed neural networks [1–8]. On the one, in the past few decades, Markovian jump systems have gained special research attention. Such class of systems is a special class of stochastic hybrid systems, which may switch from one to another at the different time. Such as component failures, sudden environmental disturbance and abrupt variations of a nonlinear system [9–11]. Moreover, it is shown that such jumping can be decided by a Markovian chain [12]. For the linear Markovian jumping systems, many important issues have been devoted extensively such as stability, stabilization, control synthesis, and filter design [13–16]. In reality, however, it is worth mentioning that most of the gotten results are based on the implicit assumptions that the complete knowledge of transition probabilities is known. It is known that in most situations, the transition probabilities rate of Markovian jump systems and networks is not known; it is difficult to obtain all the transition probabilities. Therefore, it is of great importance to investigate the partly unknown transition probabilities. Very recently, the systems with partially unknown transition probabilities have been fully investigated and many important results have been obtained; for a recent survey on this topic and related questions, one can refer to [17–23]. However, it has been shown that the existing delay-dependent results are conservative. On the other hand, the practical problems which described system stay as not
Observation of Single Top Quark Production at D0
Liang Li
Physics , 2009, DOI: 10.1063/1.3327699
Abstract: This paper presents the observation of the electroweak production of single top quarks in the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy of 1.96 TeV. Events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks are used to measure a cross section for single top quark production of sigma(ppbar -> tb + X, tqb + X) = 3.94 +- 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5X10^-7, corresponding to a 5.0 standard deviation significance.
Top Quark Production at the Tevatron Collider
Liang Li
Physics , 2011,
Abstract: Top quark physics has been a rich testing ground for the standard model since the top quark discovery in 1995. The large mass of top quark suggests that it could play a special role in searches for new phenomena. In this paper I provide an overview of recent top quark production cross section measurements from both CDF and D0 collaborations and also some new physics searches done in the top quark sector.
Propensity Score Analysis with Matching Weights
Liang Li
Statistics , 2011,
Abstract: The propensity score analysis is one of the most widely used methods for studying the causal treatment effect in observational studies. This paper studies treatment effect estimation with the method of matching weights. This method resembles propensity score matching but offers a number of new features including efficient estimation, rigorous variance calculation, simple asymptotics, statistical tests of balance, clearly identified target population with optimal sampling property, and no need for choosing matching algorithm and caliper size. In addition, we propose the mirror histogram as a useful tool for graphically displaying balance. The method also shares some features of the inverse probability weighting methods, but the computation remains stable when the propensity scores approach 0 or 1. An augmented version of the matching weight estimator is developed that has the double robust property, i.e., the estimator is consistent if either the outcome model or the propensity score model is correct. In the numerical studies, the proposed methods demonstrated better performance than many widely used propensity score analysis methods such as stratification by quintiles, matching with propensity scores, and inverse probability weighting.
Operation Indices for Smart Power Dispatch Center Design  [PDF]
Jianing Liu, Puming Li, Jin Zhong, Liang Liang
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.51B032
Abstract: With the development of power systems, power grid within a control area becomes much more complicated due to increasing number of nodes and renewable energy interconnections. The role of power system control center is more critical in maintaining system reliable and security operations. Latest developed information and communication technologies provide a platform to enhance the functions and performance of power system control center. Smart power dispatch concept will be the trend of future control center development. In this paper, we start from the human factors of control center design and propose operation indices to reduce the information presented to the system operator. The operation indices will be the important criteria in situation awareness of a power grid. Past, present, future and capability states of a power grid are also proposed to provide better visions to the operator of system conditions. The basic ideas of operation indices and operation states are discussed in the paper. In the end, the design factors for a power dispatch cockpit are discussed.
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