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Search Results: 1 - 10 of 127404 matches for " Wang Long "
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Research on the Policy of Innovation and Entrepreneurship Talents Flow from the Supply-Side  [PDF]
Ye Wang, Long Cheng
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.611009
Abstract: The development situation and main difficulties of the development of innovation and entrepreneurship talents in domestic universities were acquired by summarizing and analyzing the policy characteristics and practical experience of the innovation, entrepreneurship and technology talents mobility in the United States, Britain and Japan. This paper proposed some suggestions about policies, including two modes and the design of frame, which could provide a path and countermeasures for the government to promote the innovation and entrepreneurial flow of scientific and technological talents, at the same time, provide development paths and suggestions for subsequent policy announcements.
Coordination of Multiple Dynamic Agents with Asymmetric Interactions
Long Wang
Mathematics , 2005,
Abstract: In this paper, we consider multiple mobile agents moving in Euclidean space with point mass dynamics. Using a coordination control scheme, we can make the group generate stable flocking motion. The control laws are a combination of attractive/repulsive and alignment forces, and the control law acting on each agent relies on the position information of all agents in the group and the velocity information of its neighbors. By using the control laws, all agent velocities become asymptotically the same, collisions can be avoided between all agents, and the final tight formation minimizes all agent global potentials. Moreover, we show that the velocity of the center of mass is invariant and is equal to the final common velocity. Furthermore, we study the motion of the group when the velocity damping is taken into account. We prove that the common velocity asymptotically approaches zero, and the final configuration minimizes the global potential of all agents. In this case, we can properly modify the control scheme to generate the same stable flocking. Finally, we provide some numerical simulations to further illustrate our results.
Flocking Control of Groups of Mobile Autonomous Agents via Local Feedback
Long Wang
Mathematics , 2005,
Abstract: This paper considers a group of mobile autonomous agents moving in Euclidean space with point mass dynamics. We introduce a set of coordination control laws that enable the group to generate the desired stable flocking motion. The control laws are a combination of attractive/repulsive and alignment forces. By using the control laws, all agent velocities asymptotically approach the desired velocity, collisions can be avoided between agents, and the final tight formation minimizes all agent potentials. Moreover, we prove that the velocity of the center of mass is always equal to the desired velocity or exponentially converges to the desired value. Furthermore, we study the motion of the group when the velocity damping is taken into account. In this case, we can properly modify the control laws to generate the same stable flocking motion. Finally, for the case that not all agents know the desired final velocity, we show that the desired flocking motion can still be obtained. Numerical simulations are worked out to illustrate our theoretical results.
On Robust Stability of Multivariable Interval Control Systems
Long Wang
Mathematics , 2005,
Abstract: This paper studies robustness of MIMO control systems with parametric uncertainties, and establishes a lower dimensional robust stability criterion. For control systems with interval transfer matrices, we identify the minimal testing set whose stability can guarantee the stability of the entire uncertain set. Our results improve the results in the literature, and provide a constructive solution to the robustness of a family of MIMO control systems.
Robust Strictly Positive Real Synthesis for Convex Combination of Sixth-Order Polynomials
Long Wang
Mathematics , 2002,
Abstract: For the two sixth-order polynomials $a(s)$ and $b(s),$ Hurwitz stability of their convex combination is necessary and sufficient for the existence of a polynomial $c(s)$ such that $c(s)/a(s)$ and $c(s)/b(s)$ are both strictly positive real. Our reasoning method is constructive, and is insightful and helpful in solving the general robust strictly positive real synthesis problem.
Robust D-stability of uncertain MIMO systems: LMI criteria
Long Wang
Mathematics , 2002,
Abstract: The focal point of this paper is to provide some simple and efficient criteria to judge the ${\cal D}$-stability of two families of polynomials, i.e., an interval multilinear polynomial matrix family and a polytopic polynomial family. Taking advantage of the uncertain parameter information, we analyze these two classes of uncertain models and give some LMI conditions for the robust stability of the two families. Two examples illustrate the effectiveness of our results.
H-infinity Performance of Interval Systems
Long Wang
Mathematics , 2002,
Abstract: In this paper, we study $H^{\infty}$ performance of interval systems. We prove that, for an interval system, the maximal $H^{\infty}$ norm of its sensitivity function is achieved at twelve (out of sixteen) Kharitonov vertices.
Edge Theorem for Multivariable Systems
Long Wang
Mathematics , 2002,
Abstract: This paper studies robustness of multivariable systems with parametric uncertainties, and establishes a multivariable version of Edge Theorem. An illustrative example is presented.
Robust Strictly Positive Real Synthesis for Polynomial Families of Arbitrary Order
Long Wang
Mathematics , 2002,
Abstract: For any two $n$-$th$ order polynomials $a(s)$ and $b(s),$ the Hurwitz stability of their convex combination is necessary and sufficient for the existence of a polynomial $c(s)$ such that $c(s)/a(s)$ and $c(s)/b(s)$ are both strictly positive real.
Improved Results on Robust Stability of Multivariable Interval Control Systems
Long Wang
Mathematics , 2002,
Abstract: For interval polynomial matrices, we identify the minimal testing set, whose stability can guarantee that of the whole uncertain set. Our results improve the conclusions given by Kamal and Dahleh.
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