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A novel greedy algorithm for blind CS recovery without prior knowledge of sparsity, called the Bisection Subspace Pursuit (BiSP) is introduced. The most outstanding feature of the BiSP is that it adopts the bisection method to adaptively estimate the sparsity of target signal, which means that no prior knowledge of sparsity is needed. Simulation results demonstrate that the BiSP not only retains comparable recovery accuracy with CoSaMP, SP and SAMP, but also outperforms the SAMP in terms of complexity when sparsity of signal is large. This makes the BiSP a competitive candidate for many practical situations.

The first-principles with pseudopotentials method based on the density functional theory was applied to calculate the formation energy of impurities and the electronic structure of ZnO doped with Na. In Na-doped ZnO, NaOis the most unstable than the other cases. Simultaneously, NaZnis more stable than Naiaccording to that NaZnhave smaller formation energy. Furthermore, the electronic structure of Na-doped ZnO indicates that that NaZnbehaves as an acceptor, while Naibehaves as a donor.

To investigate the plankton and water quality of Qiantang river, plankton of 12 sampling sites of the study area were monitored in summer 2013. Results revealed that 65 genera of phytoplankton including 37 bio-indicators of pollution and 21 genera of zooplankton were observed. Diversity analysis showed that Shannon-Wiener indexes of phytoplankton and zooplankton were at 1.44 to 2.56 and 1.61 to 2.61, plankton biodiversity integrated index were at 0.419 to 0.558, and water quality integrated index were at 0.303 to 1.43. Data analysis suggested that the water quality of Qiantang river could be sorted from α type to β type of moderate pollution, the pollution degree could be sorted from moderate pollution to slight pollution. The evaluation results by using plankton and physicochemical indexes were consistent.

For multiple objects tracking in complex scenes, a new tracking algorithm based on linear fitting for multiple moving objects is proposed. DG_CENTRIST feature and color feature are combined to describe the object, and the overlapping ratio of the tracking object is calculated. The object in the current frame is measured by using coincidence degree. If there is occlusion, we predict the path of each object by linear fitting and adjust the results of tracking in order to get correct results. The experiment results show that this method can effectively improve the accuracy of the multiple target tracking.

In recent years, China sports industry has been developing rapidly, the development of sports industry is the need of socialist market economy, and the development model of scientific and rational low carbon economy sports industry has an important to enhance the development of sports. Firstly, based on the sports industry organization we analyze the industry characteristics of the sports industry, on the basis, the use of Ad Hoc network dynamic simulation and optimization method carries out dynamic simulation analysis of sports industry chain low carbon economy model evolution mechanisms and path optimization, and then according to the diffraction of the ideal folding times can obtain the folding frequency variable, so as to simulation analyze the low carbon economy model of optimization sports industry chain. The results show that test results are obvious, and its method can fully demonstrate the evolution mechanism of low carbon economy model, providing the optimal path selection.

In this paper, taking Laohutan reservoir in Huzhou city of Zhejiang province as an example, we systematically discussed the variation trends of trophic status in the early impoundment period of newly built reservoir and the dominant factor of eutrophication. It has been proved that the reservoir’s nutrition index in the early stage is on rise and the water body has a trend of eutrophication. According to actual situation, the outbreak of cyanobacteria and deterioration of water quality in September have showed the features of eutrophication. The dominant factors of eutrophication are total phosphorus, total nitrogen and dissolved oxygen, among which total phosphorus matters most to the trophic status. The results have laid great important foundation for people to explore evolution process of new reservoir ecosystem and the influences of hydraulic engineering construction to ecological environment, and they also provide reference for construction and management of other new reservoir.

Soils and vegetation of submerged areas will be the endogenous pollutions sources after water storage comes into use in the newly constructed reservoir. Enriched nutrients are released gradually into water, which has an effect on the water quality of reservoir. In this paper, taking Laohutan Reservoir as a study object, accumulation levels of nutrients in soils of the four main types of land use in the reservoir area are studied, the total amount of the pollutants produced by vegetation incineration in the reservoir area is estimated, and based on the experiments the effects of the pollutants in residual vegetation on the water quality of the proposed reservoir are predicted. It provides the theoretical bases for the pollution control of newly constructed reservoir and the establishment of purification measurements before water storage.

This paper presents a random sampling method for gas signal,which is based on the principle called compressed sensing. This method is suitable for gas sensor network, and it is conducive to the realization of low power, low cost of the gas sensor network. According to the characteristics of the output signal of gas sensor, we design the random sampling method which acquire the useful information in signal. Using compressed sensing recovery algorithm to reconstruct signal,we finally fulfill complete signal collection. The simulation results show that the method we proposed can achieve signal acquisition with a sampling frequency less than 1/5 of standard sampling frequency.

In this paper, we utilize recent advances in compressive sensing (CS) theory to enable signal acquisition beyond Nyquist sampling constraints. We successfully reconstruct signals sampled at sub-Nyquist sampling rates by exploiting additional structure. We present a working prototype of data acquisition hardware based on CS theory. The architecture is particularly suitable for sparse gas signals that are sparse in some transform basis. This prototype has the advantage of enhancing the performance of gas sensor arrays data acquisition system by decreasing the data amount and storage memory. We report successful recovery of four-paths surface acoustic wave (SAW) signal at sampling rates less than the Nyquist-rate, which represents perfect reconstruction performance and savings in the storage memory using less than 25% of the original.

Images matching is the basis of image registration. For their difference, a improved SURF(speeded up robust features) algorithm was proposed for the infrared and visible images matching. Firstly, edges were extracted from the images to improve the similarity of infrared and visible images. Then SURF algorithm was used to detect interest points, and the dimension of the point descriptor was 64. Finally, found the matching points by Euclidean distance. Experimental results show that some invalid data points were eliminated.

In this paper, we have studied the mechanical abrasion of the filter bags used in Electrostatic-fabric Integrated Collector (EFIC) and baghouse systems. Four factors have been listed: the effect of improper structure design and installation, the effect of quality of filter bag and poor filter cages. Common problems have been discussed, and the corresponding advices have been proposed.

It is reported that large quantities of valve regulated lead-acid batteries used in the substations shall be harmlessly treated, for lead plates, sulfuric acid and other compositions are direct hazard for the environment. Herein, we have carried out the investigation on the reconstruction and reuse of the used VRLA, battery reconditioning, influence of spent VRLA to the environment, storage condition obeying to environment of state grid and directed cycle model of recycling technologies.

In the paper, a new spatio-temporal segmentation algorithm is proposed to extract moving objects from video sequences, the sequences were taken by stationary cameras. First, the motion detection is used to achieve the mask representing moving regions with a estimation noise parameter. Which can effectively improve noise immunity. Due to the shortage of the moving video object textures, the eight-neighbor motion detection is present, which is used to smooth the mask boundary and fill the interior holes. Then a morphological filter is applied to refine the moving mask. Second, spatial segmentation is detected by the Canny operator. Then utilize the gradient histogram to select the high threshold to increase the adaptivity of Canny algorithm. Finally, merge the temporal and spatial mask by neighborhood matching algorithm to ensure further reliability and efficiency of our algorithm. Experiments on typical sequences have successfully demonstrated the validity of the proposed algorithm.

This paper describes the design and construction of the Foundation pit with steel sheet piles which is on a deep and small area, achieving good economic and social benefits.

This essay starting with the origin of thought about equation, discusses the development course of radical formula for equation from simple to higher degree, introduces the derivation method of radical formula for cubic equation and quartic equation, and compares two methods of radical formula for quartic equation(Ferrali method and Descartes method). There is no general formula of root for equation of 5-th order or higher degree. Eventually, this essay expounds the development process of equation’s contributions to algebra field.