Abstract The effect of temperature on a ZnO/Mg 0.3 Zn 0.7 O quantum cascade detector (QCD) in the mid-infrared region is investigated with consideration bound-to-bound electronic-transport processes dark and under illumination. temperature-dependent band structures QCD system, which comprises four wells five barriers one period, are numerically calculated. electronic transition obtained standard electron-optical phonon Hamiltonian, photon absorption described by two-dimensional coefficient....

The location of a logistics center is very important in system, as the success determines whole system’s structure, shape, and mode, not only affects center’s own operating costs, performance, future development, but also operation entire system. Therefore, selection for has great significance improving efficiency regional optimizing structure This study constructed multi-factor constrained P-median site-selection model to optimize locations centers improve system region. results show that...

The high-field electron transport properties of ZnMgO/ZnO heterostructures considering multisubband conduction were systematically investigated with an ensemble Monte Carlo program developed by us. Electronic band structures obtained first-principles calculations using density functional theory, which provides more accurate parameters to calculate the electronic states and characteristics 2-D gas. Wave functions energy levels describing subband structure achieved determine scattering rates...

Biometric applications makes biometric authentication replace the traditional password in many cases. recognition technology has advantages of convenience and high stability, facilitating identity recognition. However, shortcoming is easy to be stolen leaked, which raises security concerns. In this paper, we design a lightweight joint scheme (SELBA) based on face fingerprint. We improve searchable encryption (SE) protect privacy extracted features storage stage. Because problem that cannot...

The role of cluster scattering on electron transport properties ZnMgO/ZnO heterostructures considering three- and five-valley conduction band models was investigated with an ensemble Monte Carlo program developed by us. is modeled as elastic collision, in which the electrons confined ZnO well are scattered MgZnO clusters. interface roughness scattering, dislocation alloy disorder phonon also taken into account simulation. For both energy models, it found that Mg composition fluctuation (η),...

In this paper, a new method of sparse coding shrinkage based on independent component analysis is proposed to reduce speckle in polarimetric SAR Images. With soft-thresholding operator Image, reduces effectively and preserved properties. The experiment shows that the image edges are retained with removed effectively.

The influence of alloy cluster scattering on the electron transport properties in undoped Zn1-xMgxO/ZnO heterostructures was studied theoretically. Alloy is treated as an elastic occurring between MgZnO clusters and electrons. energies wave functions are obtained to calculate rates two-dimensional gas (2DEG) by solving Schrödinger Poisson equations self-consistently. total low-temperature mobility then calculated using Matthiessen’s rule. It found that composition fluctuation Zn1-xMgxO...

According to the requirements of real-time, reliability and safety for aerospace experiment, single center cloud computing technology application verification platform is constructed. At IAAS level, feasibility be applied field experiment tested verified. Based on analysis test results, a preliminary conclusion obtained: Cloud can intensive business. For I/O business, it recommended use traditional physical machine.

To achieve the terminal host data backup and recovery needs of important information system, characteristics commonly used traditional technologies are compared analyzed. After sorting out main problems such as large loss, long time, inconvenient management operation, high construction cost, stand-alone continuous protection system technology is studied. Through use key holographic logs block changes protection, fast based on computer effectively solved. At same it easy to operate, cost low,...

Ciphertext retrieval for cloud-based Internet of Things has been widely explored with the increasing popularity cloud computing. However, in most existing solutions, security and efficiency process are difficult to achieve simultaneously. To this end, we develop a novel secure matrix index, utilize identity-based encryption encrypt keywords homomorphic values. The former can guarantee keyword, latter realize operation while ensuring safety. Then, an bidirectional authentication algorithm...

The classical methods are very sensitive to noise when used edge detection of image. Because the problem, a new method for image completely based on Independent Component Analysis (ICA) is proposed in paper. First, sparse coding shrinkage algorithm independent component analysis (ICA-SCS) reduce component, and then we can obtain processed other two images by proper geometric transformation These three strongly correlative. Then sharpening be obtained matrix information means ICA....

The computer is an important symbol of mankind enters the information age and this phenomenon cyber crime was studied deeply by scholars. laws many countries on how effective punishment prevention requires a robust, number scope regulations, even proceedings, which lagged far behind reality demand for in judicial practice. Computer network Chinese Criminal Law lack judgment Elements actual operability, so having some new problems to be solved.

Currently, there are many independent and closed "chimney" application systems in enterprises, In view of this situation, paper designs implements an private cloud intelligence office system based on IOT,which focused the Integration all servers, storage,network resources, take computing technology, big data storage network connection database networking technology as core.The methods techniques realized unified management integrated information system, with strong safety, practicality,...

The cloud data center for aerospace trial mission must be high-performance, high stability, security and scalable computer network architecture, in order to support the need continuous updating, upgrading development future, ensure smooth implementation of test task.According Characteristics technical requirements IT operation maintenance Aerospace system, With domestic self-controlled hardware software as core, Adopt subsystem, hierarchical, modular design concept system Building an all...

Abstract In view of the new network security situation, this paper analyses present situation information system aerospace business network, and puts forward main problems that need to be improved perfected. these problems, overall consideration future-oriented architecture design is put forward.It includes building dynamic defense model, unified trust infrastructure, network-wide situational awareness early warning capabilities. A generation designed.Measures suggestion for follow-up...

In order to solve the problem that popular monaural speech enhancement models based on encoder-decoder do not make full use of full-scale features, a feature connected model FSC-SENet is proposed. Firstly, this paper constructs CRN architecture. Convolutional encoder and decoder are used extract features recover signals, LSTM modules temporal at bottleneck model. Then connection method multi dynamic fusion mechanism proposed, so can clean in decoding process. Experimental results TIMIT...