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The amorphous LaAlO3 (LAO) thin films were prepared with different oxygen flow rate using pulsed laser deposition (PLD) at room temperature and without additional thermal treatment. The Al/LAO/ITO MIM capacitor stacks were deployed to test the variation of its electrical characteristics in conjunction with atomic force microscopy (AFM), Alpha-step profiler, x-ray photoelectron spectroscopy (XPS),...
The rotordynamic characteristics of a simulated rotor system supported on gas foil bearings was investigated, which has a rated speed of 24 krpm. A test rig was established and assembled to simulate the operating performance of the rotor system for a microturbine. The compliant gas foil journal and thrust bearings were designed to support the rotor. The rotor system was driven by high pressure gas...
A new modified mathematics model is proposed based on fuzzy mathematics theory and adaptive weighted algorithm aimed at how to analyze the influence on communication network security. The proposed model is associated with the attention degree on security defense is executed. In the proposed model, the communication network security threat, communication network attack approach, network security character...
This paper presents a novel feed for dual-layer pillbox antenna. The electric field distribution and return-loss of the feed Cavity are analyzed by using vector finite-element method and PML absorption boundary condition. The effect of the different Sub-reflector Shape on the electromagnetic field distribution and the beam width of the feed are studied. A new bow-tie feed structure is proposed. The...
This paper presents a novel Ku-Band low profile antenna system for mobile sitcom. The antenna is designed in the shape of a four-to-one rectangle based on planar antenna array. The method of beam scanning tracking is used which is simple and efficient. The antenna can mechanically scan the communication satellite automatically from 0° to 90° in elevation and 360° coverage in azimuth, achieving remote...
Based on the integration of Java language and open-source R software environment, the article was developed a Traditional Chinese Medicine fingerprints analysis and visualization system and taken Szechwan Lovage Rhizome HPLC fingerprints as the study object to conduct data processing, information analyzing, and data mining research. In the article, 24 batches of Szechwan Lovage Rhizome from three...
This work presents the method to enhance the linearity of current integration. Through utilizing the parasitic model of capacitance, we develop an extraction method to estimate parasitic components concerning with linearity of integration. The further use of negative impedance converter provides adjustable negative impedance for compensating redundant parasitic components. The resulted impedance is...
Oxidative steam reforming of ethanol is an effective way to produce high yields of hydrogen. A novel series of pyrochlore-type metal oxide of La2Ce2−xNi0.5xO7−1.5x (x=0.1–0.9) was prepared and its catalytic performance was studied. All the materials were characterized by X-ray powder diffraction (PXRD), inductively coupled plasma atomic emission spectrometer (ICP-AES) and temperature-programmed reduction...
In this paper, we present a novel heuristic quasi 3-D ray-tracing model by taking into account the advantages of both the image theory and shooting-and-bouncing ray tracing methods. This new model is based on preorder-creating a new visibility virtual source tree together with modified polar sweep algorithm. As it is fundamentally a point-to-point ray tracing method and efficient acceleration techniques...
An idea of virtual source and multiway tree is introduced to present a new and very fast ray-tracing method, which is based on uniform geometrical theory of diffraction (UTD) and can solve some of the problems that other ray-tracing methods have. It is developed for quasi three-dimensional (3-D) environments and can be applied to any complex propagation environment composed of arbitrary-shaped buildings...
In order to locate license plates in a complex environment, we develop a novel license plate location algorithm by combing the texture features of plate and features in the RGB color space. A picture is first filtered with a custom convolutional kernel in order to enhance the texture of characters, followed by morphological processing to get region set A. The RGB features of the license plate are...
In this paper, we propose a low speed built-in-self-test (BIST) scheme for testing static parameters of high-speed digital-to-analog converter (DAC). Based on under-sampling technique, the DAC output signal is modulated into low speed pulse signal by pulse-width-modulation (PWM) with two sinusoidal carriers. The nonlinearity errors of DAC hence represents on duty ratio of converted pulse signal. In...
This paper proposed a constraint-based Design Risk Management (DRM) tool for the improvement of design decision-making under a collaborative product environment. This tool is developed by incorporating collaborative design features, risk management process and theory of constraints (TOC). The research is focused on: 1) exploration of various design constraints from all possible design variables, 2)...
Three dimensions packaging provides a very promising technology for the effective integration of complex systems: devices that are optimally implemented with various different technologies can be separately manufactured and then stacked and connected by means of efficient vertical interconnections over a very short range; this provides most of the benefits of inter-chips for high-bandwidth with a...
Simultaneous multithreading (SMT) and chip-multiprocessor (CMP) are currently two important trends in the design of processors. As the processor executes more than two programs simultaneously, these programs will compete keenly for the use of the cache. This makes it more difficult to predict the worst case computation time (WCET), and might even lead to an overall low efficiency in certain circumstances...
This paper proposes an isolated multilevel inverter composed of four standard two-level voltage source inverters (modules), a single dc source and a specially connected three-phase transformer, zig-zag-connected transformer. The proposed configuration can reduce the number of transformers and current and voltage stresses compared with traditional three-phase multilevel inverters with same lower rating...
In this work, we proposed a linear CMOS temperature-to-current converter as a temperature sensor, which especially benefit on enhancing the accuracy of thermal monitoring. The proposed design achieves highly linear relationship between temperature and current by annulling the most critical nonlinear square terms of it. Through utilizing a compensation scheme among two current sources driven in saturation...
This paper proposed a constraint-based Design Risk Management (DRM) tool for the improvement of design decision-making under a collaborative product environment. This tool is developed by incorporating collaborative design features, risk management process and theory of constraints (TOC). The research is focused on: 1) exploration of various design constraints from all possible design variables, 2)...
Cognitive networks become hotspot in the field of network research recently. It is considered a valid solution for heterogeneous networks. In this paper, we propose a new architecture of cognitive networks and divide its cognitive capabilities into three sub-layers named access cognitive layer, network cognitive layer and service cognitive layer. The aim of the design is to implement cognitive capabilities...
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