Abstract:
dustrial structure is key link of man's action to ecological environmental system. Its combina-tion type and intensity determine, to a great extent, economic benefit, resources utilization efficiency andstress on environment. So the assessment to the rationality of industrial structure is of great importance. Inpresent paper, the research theories and ways on relationship between industrial structure and ecological en-vironmental systems were put forward. Environmental carrying capacity (ECC) was adopted to describequantitatively the relationship between man's social economic activity and environmental resources. At theend of this paper. analysis was made with Benxi City as an example.

Abstract:
In this paper, we consider a network of energy constrained sensors deployed over a region. Each sensor node in such a network is systematically gathering and transmitting sensed data to a base station (via cluster- heads). This paper focuses on reducing the power consumption of wireless sensor networks. Firstly, we proposed an Energy-balanced Clustering Routing Algorithm called LEACH-L, which is suitable for a large scope wireless sensor network. Secondly, optimum hop-counts are deduced. Lastly, optimum position of transmitting node is estimated. Simulation results show that our modified scheme can extend the network lifetime by up to 80% before first node dies in the network. Through both theoretical analysis and numerical simulations, it is shown that the proposed algorithm achieves higher performance than the existing clustering algorithms such as LEACH, LEACH-M.

Abstract:
WSNs (Wireless Sensor Networks) can collect reliable and accurate information in distant and hazardous environments, and can be used in National Defence, Military Affairs, Industrial Control, Environmental Monitor, Traffic Management, Medical Care, Smart Home, etc. The sensor whose resources are limited is cheap, and depends on battery to supply electricity, so it’s important for routing to efficiently utilize its power. In this paper, an energy-efficient Single-Hop Active Clustering (SHAC) algorithm is proposed for wireless sensor networks. The core of SHAC has three parts. Firstly, a timer mechanism is introduced to select tentative cluster-heads. By analyzing relation between time of timer and residual energy, it is known that time of timer is inversely proportional to residual energy of nodes so a timer mechanism can balance the residual energy of the whole network nodes which improves the network energy efficiency. Secondly, a cost function is proposed to balance energy-efficient of each node. Finally, an active clustering algorithm is proposed for single-hop homogeneous networks. Through both theoretical analysis and numerical results, it is shown that SHAC prolongs the network lifetime significantly against the other clustering protocols such as LEACH-C and EECS. Under general instance, SHAC may prolong the lifetime by up to 50% against EECS.

Abstract:
This study is devoted to investigating the regularity criterion of weak solutions of the micropolar fluid equations in . The weak solution of micropolar fluid equations is proved to be smooth on when the pressure satisfies the following growth condition in the multiplier spaces , . The previous results on Lorentz spaces and Morrey spaces are obviously improved. 1. Introduction Consider the Cauchy problem of the three-dimensional (3D) micropolar fluid equations with unit viscosities associated with the initial condition: where , and are the unknown velocity vector field and the microrotation vector field. is the unknown scalar pressure field. and represent the prescribed initial data for the velocity and microrotation fields. Micropolar fluid equations introduced by Eringen [1] are a special model of the non-Newtonian fluids (see [2–6]) which is coupled with the viscous incompressible Navier-Stokes model, microrotational effects, and microrotational inertia. When the microrotation effects are neglected or , the micropolar fluid equations (1.1) reduce to the incompressible Navier-Stokes flows (see, e.g., [7, 8]): That is to say, Navier-Stokes equations are viewed as a subclass of the micropolar fluid equations. Mathematically, there is a large literature on the existence, uniqueness and large time behaviors of solutions of micropolar fluid equations (see [9–15] and references therein); however, the global regularity of the weak solution in the three-dimensional case is still a big open problem. Therefore it is interesting and important to consider the regularity criterion of the weak solutions under some assumptions of certain growth conditions on the velocity or on the pressure. On one hand, as for the velocity regularity criteria, by means of the Littlewood-Paley decomposition methods, Dong and Chen [16] proved the regularity of weak solutions under the velocity condition: with Moreover, the result is further improved by Dong and Zhang [17] in the margin case: On the other hand, as for the pressure regularity criteria, Yuan [18] investigated the regularity criterion of weak solutions of the micropolar fluid equations in Lebesgue spaces and Lorentz spaces: where is the Lorents space (see the definitions in the next section). Recently, Dong et al. [19] improved the pressure regularity of the micropolar fluid equations in Morrey spaces: where Furthermore, Jia et al. [20] refined the regularity from Morrey spaces to Besov spaces: with One may also refer to some interesting results on the regularity criteria of Newtonian and non-Newtonian fluid equations

Abstract:
We deal with the stabilization problem of discrete nonlinear systems. We construct a control Lyapunov function on discrete nonlinear systems. Then, we present a new method to construct a continuous state feedback law.

Abstract:
Why massless particles, for example photons, can only have two helicity one-particle states is the main subject of this work. As we know, the little group which describes massive particle one-particle states' transformations under the Lorentz transformation is SO(3), while the little group describing massless states is ISO(2). In this paper, a method which is different from Inonu-Wigner contraction is used to contract SO(3) group to ISO(2) group. We use this contraction method to prove that the particle can only have two helicity one-particle states from the perspective of kinematics, when the particle mass tends to zero. Our proof is different from the dynamic explanation in the existing theories.

Abstract:
It is very significant to reveal spatial interaction laws in the research of spatial transportation linkage. In this paper, the following subjects are discussed deeply: (1) Essential factors of spatial transportation linkage. They could be summed up into five kinds: a. Communication passageway; b. Spatial differentiation, Including natural and economic differentiations; c. Spatial interdependence and competition; d. Location; e. Regional policies. (2). Goods export and import of provincial region- The results of analysis would reveal the external dependence of provincial region that was led by goods exchange. In export and import,, there are obvious spatial setup and great disparity in scale. The areal coefficient of centralization are very different. (3). Interregional transportation linkage. A complex interaction network was made up by interprovincial transportation linkages. In the network, most of the linkages are weak, and its main part is determined by 33 linkages that their goods exchange accounts for 46 percent of the total. The macroregional transportation linkage indicates that the goods exchange among six coordinate economic regions are very different. Its development tend is significant for the allocation of economy and communication. In addition, the conception of "Primary linkage" is defined and used to test and verify the existing foundation of economic regions.