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This paper proposes a new control method for two stage converters to realize the virtual synchronous generator (VSG) operation, which also can help eliminate circulating power between energy storage (ES) converters. It is proven in this paper that the proposed method shares stronger resemblances with synchronous generators (SGs) than traditional VSG in aspects of power conversion process and mathematical...
The study is to investigate a fast globally convex variational model for the multiphase image segmentation. Firstly, a nonconvex energy functional on the membership functions, which are used as indicators of different homogeneous regions, is introduced by incorporating edge-based information. Secondly, the nonconvex problem is converted into a continuous convex formulation. Finally, a dual minimization...
A control problem of dynamic processes described by partial differential equations (PDE's) is proposed and studied in this paper. They are linear distributed parameter models. The inputs of the models discussed are position-independent. As is known to all, distributed parameter systems always demand high tracking precision and good stability. However, it is difficult for classical approaches to achieve...
Six-degree-of-freedom (6-DOF) haptic rendering for fine manipulation in narrow space is a challenging topic because of frequent constraint changes caused by small tool movement and the requirement to preserve the feel of fine-features of objects. In this paper, we introduce a configuration-based constrained optimization method for solving this rendering problem. We represent an object using a hierarchy...
Unlike a conventional articulated manipulator, where only the gripper manipulates objects, a continuum manipulator, such as a multi-section trunk/tentacle robot, is promising for deft manipulation of a wide range of objects of different shapes and sizes. Given an object, a continuum manipulator tries to grasp it by wrapping around and squeezing it. A main open problem is how to determine if the object...
The energy-saving gap of building is serious. In practical matters of building engineering, the input process of time-varying system can be divided into several stages. In every stage, the system has its own rules and features. At present, various evaluation methods are slow in solving this matter. Cascade neural network can properly describe the growth continuity of each part of building energy-saving...
There are at least three paths to solve the value innovation and value-added conditions for China construction industry. This paper synthesizes three perspectives to construct a frame and strives to rethinks the delimma for the development of China construction industry. From the institutional transition economics view, it finds that The reform of industry and the breakthrough of operational mechanism...
Six-degree-of-freedom (6-DOF) haptic rendering for fine manipulation in narrow space is a challenging topic because of frequent constraint changes caused by small tool movement and the requirement to preserve the feel of fine-features of objects. In this paper, we introduce a configuration-based constrained optimization method for solving this rendering problem. The six-dimensional configuration (position...
Starting from innovative management prospective, in connection to construction energy-saving gap, and with construction energy-saving chain management as theme, this paper studies the characteristic of innovative management of construction energy-saving and how to organize and operate in Chinese architecture industry. Basic on system control theory, author introduced status parameters (variables)...
In this paper, by many simulation measurements, we analyze and compare fully effects on network performance with Poisson traffic input of traditional SRD traffic flows and FBM traffic input of LRD traffic flows, in terms of tail distribution and packet loss probability of the queue length under the condition of infinite and finite buffer cache by adopting direct transmission (DT), amplify-and-forward...
Based on building energy-saving current situation and the uncertainty analysis in energy-saving chain management, this paper describes the Leak and Spread Mechanism of Building energy-saving in the process of construction to energy-saving Building, constructs the dynamic expansion model to show the growth and expansion trend of construction energy-saving inappropriate information, presents the information...
With the construction industry data from 1985 to 2005 in China statistical yearbook, this paper evaluates the contribution of non-state-owned and state-owned economy of the construction industry, respectively. From the comparisons and options of the convergence equations, three main equations are established. From these equations, it is easily found that the state-owned economy is still in the predominate...
One of the main problems in the enterprise structure is the actual disorder of the three hierarchical schemes for the enterprise management China construction industry, which brings the stochastic risk of enterprise structure for the value innovation of China construction corporations. The principal reason is that corporation are being involved in a low-interest and severe circle competition, due...
In this paper, the value innovation is introduced, becoming the inevitable choice for structure growth of China construction industry. According to the refined hypothesis, form the current dilemmatic condition of China Construction Industry, these two kinds of construction enterprises are making the deal in the corresponding market, one is enjoying the value innovation, exploring the high value-added...
This paper addresses a largely open problem in haptic simulation and rendering: contact force and deformation modeling for haptic simulation of grasping a deformable object with a realistic virtual human hand, especially in power grasps. The virtual hand model consists of meshes of realistic shapes for the finger links and palm of a hand. We tackle the problem by adopting the non-linear contact force...
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