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A wideband and wide-angle scanning circularly polarized array with low profile is introduced. The proposed array is composed of three annular sub-arrays with tilted elements and a ripple-shaped ground plate. A case with 64 elements is designed and simulated. The simulation results demonstrates that array scanning gain fluctuations less than 2.26 dB at the center frequency and 3 dB in the operation...
This paper presents a wideband circularly polarized array with improved gain and sidelobe level by using bowl-shaped reflector with high impedance surface (HIS). The proposed array is composed of four crossed dipole elements which have a sequentially rotated configuration. The high impedance surface is realized by applying corrugated surface to the bowl-shaped reflector. The simulation results show...
Active rectifier with comparators (CMPs) is often used in wireless power transmission (WPT) systems. However, it suffers from low power conversion efficiency (PCE) in light load condition and multiple pulse problem (MPP) due to the CMPs with delay compensation. In this paper, a novel active rectifier with delay time controller is proposed to solve both issues. A current control delay line (CCDL) is...
The mathematic models were established to study the distribution of the flow field and movement rule of the smoke in a transport aircraft cabin with environment control system when fires broke out. Based on the interaction of forced convection and natural convection, this article simulated and analyzed the changes of temperature fields and concentration fields of combustion product in initial stages...
The electronic structures and densities of states of the spinel CdIn2S4 crystals have been investigated using the first-principle density function theory and pseudopotential method in this paper. The results show that CdIn2S4 is an indirect semiconductor with the band gap of 1.44 eV. Cu doping can narrow the band gap of CdIn2S4 to 0.88 eV. The calculated results indicate that Cu doping may be one...
In2S3 quantum dot coated ZnO nanorod arrays have been synthesized via two step method. ZnO nanorod arrays were prepared by a facile and low-cost hydrothermal process, and In2S3 were deposited on the nanorods by a successive ionic layer adsorption and reaction technique. The structure, morphology, and optical properties of the In2S3/ZnO nanorod arrays are investigated. The photoelectorchemical measurements...
Aiming at the problem of mesh saliency detection, this paper proposes the entropy based salient model. Firstly, normal vector of each mesh vertex is generated, as the descriptor of each vertex, and each vertex's local neighborhood is chosen. Secondly, histogram is utilized to calculate the probability valuedistribution of the vertexes' normal vector in the neighborhood. Finally, entropy can be used...
This paper improves the Smith-Waterman algorithm. On the one hand, it present the two-character alignment, improve the scoring function and scoring matrix to enhance the specificity and reduce the randomness of the matching sequences. On the other hand, changing the score matrix overall storage to two-line storage drastically reduces the complexity of the program space. Finally, using the Python language...
Entanglement-assisted quantum error-correcting codes are not only theoretically interesting, but also of great importance in practical physically applications. In this work, two class of entanglement-assisted quantum codes are constructed. The first class of entanglement-assisted quantum codes is minimal ebits entanglement-assisted quantum codes, which require only one copy of maximally entangled...
In this work, Narrow band gap CdS and PbS quantum dots are cosensitized TiO2 NTWs array by successive ion layer absorption method(SILAR), and the photoelectrochemi-cal (PEC) performance of the heterostructures is investigated carefully, it is found that the photoelectric properties of QD/TiO2 array film are superior to pure TiO2 array film, and the PbS/CdS/TiO2 array film exhibits the best performance,...
Highly ordered arrays of ZnO/CIS nanorods have been synthesized on FTO substrates by using ZnO nanorod as template via a low-cost solution method. ZnO nanorod arrays were prepared via a hydrothermal route, and CIS layer were electrodeposited on the ZnO nanorods, then the films were crystallized via an annealing process finally. The structures of the films were characterized by XRD and SEM. The results...
Operations in tabular forms conforming to the structures of relationships between cells (called "semantic structures") have relied on a great deal of manpower in the existing application software. It is difficult to efficiently and properly process huge amounts of information with conventional methods. Therefore, we are developing a method of operation that uses computer assistance to safely...
DNA replication, a critical step in cell division and proliferation, is a process of producing two identical replicas from one original DNA molecule. Although great advances have been made in DNA replication research, the detailed mechanism of DNA replication is still unresolved. Faithful DNA replication requires the cooperation of many proteins. Failures in DNA replication leave mutations in the...
Oxidative stress can damage major cell components, including protein, DNA, lipid and cell membranes, which may make cells lose function and induce a wide variety of diseases. As an extensive kind of antioxidants in human and animals, antioxidant proteins are essential to eliminate cell damage and aging problems caused by oxidative stress. Accurate identification of antioxidant proteins is a significant...
As a very fast traffic tool, the stability of the roadbed of Shanghai maglev is very important. However, the geological condition in Shanhai is very poor and the ground subsidence is severe. So, it is necessary to monitor ground subsidence in the area along the maglev precisely. For half a century, precise levelling method has been used to survey the ground subsidence in Shanghai. But the levelling...
We present an approach to fabricate 100 nm polarization gratings on the substrates of Si and quartz slide covered with an aluminum film in a 30 kV acceleration voltage electron beam lithography system. The exposure dose was set from 300 to 1500 µc/cm2, with the other parameters fixed including the electron accelerating voltage, beam spot size and beam current. It is found that when the substrate density...
The wireless transmission mode of difference frequency hopping signal causes that it will include jamming signal in the received signal, and it will affect the correct receiving of the DFH signal. Based on studying the mechanism and characteristics of DFH signal, and utilizing the statistical independence, a method is proposed for separating DFH signal in mixing signals by JADE. The proposed method...
ZnO nano/microstructures have been successfully synthesized via the thermal evaporation mothed using Sn powders as the reducing agents. The as-synthesized products have been systematically studied by X-ray powder diffraction (XRD), Raman spectroscopy (RS), scanning electron microscope (SEM), electron energy-dispersive X-ray (EDX) and ultraviolet-visible spectrum (UV-vis). The results indicate that...
The Cu2ZnSnS4 thin films have been deposited onto FTO glass substrates by a simple solvothermal method. The films were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analyzer, and optical absorption spectroscopy technique, respectively. The influence of the annealing temperature on the structure, morphology, and composition of the films has been studied....
Cadmim Indium sulfide (CdIn2S4) thin films composed of wedgelike crystals were prepared on fluorine-doped tin oxide substrate by a tartaric acid assisted hydrothermal method. The tartaric acid was found to play an important role in the formation of the final product. The formation mechanism of the CdIn2S4 film was also discussed. The optical properties and microstructure of the CdIn2S4 films were...
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