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This paper introduces a design method and a hardware circuit of burglar alarm circuit based on the magnetic field sensor, which can be used to achieve the protection of valuables. The circuit design is ingenious, and has the characteristics of simple structure, light weight, small size, timeliness, high sensitivity and low cost. It has been proved to have a stable and reliable performance by experiment.
The electrical characteristic test of nanowires is important in nano-materials research. The metal-semiconductor junction that is fabricated with semiconductor nanowire and metal probe in electrical test system has impact on the test result directly, therefore it's necessary to study I-V characteristics of the metal-semiconductor(M-S) junction. Si, ZnO, GaN have been selected from multiple semiconductor...
There exist many problems in the development of cities, such as: transportation, energy, health care, public safety, etc. It is worth for us to make some valuable researches to solve these issues. Fortunately, with the development of communication technology, microelectronics, graphics rendering technology, we can use these technologies to build a smart, efficient city for the city's future development...
Pathfinding in the context of video games concerns the way in which a moving entity finds a path around obstacles; the most frequent context is real-time strategy games (in which the player directs units around a play area containing obstacles), but forms of this are found in most modern video games. It is probably the most popular but frustrating game artificial intelligence (AI) problem in game...
In order to improve the robustness of 3D meshes over the BEC channel, an unequal error protection scheme was proposed on the basis of 3D meshes partition and expanding window fountain (EWF) codes. Firstly, the wavelet transform method is applied to obtain the basic grid and a series of wavelet coefficients of 3D meshes, then we use EWF to provide an unequal error protection method for the different...
Recently biosensors based on silicon nanowire field-effect transistors (SiNW-FETs) have drawn huge amounts of attention, due to their ultra sensitivity, selectivity, label-free and real-time detection abilities. As people know more and more knowledge of the structure and function of nucleic acid molecules, DNA detection has gained importance increasingly. Here, we briefly summarize major fabrication...
Customization is considered as a promising way for better satisfying diversity of customer needs. In organizations short of resources, it is a frequent challenge to get balance between development and customization workload in order to ensure product success as well as customer satisfaction. In this paper, we proposed a value-based product portfolio scoping approach to determine optimal product scale...
In this paper, we proposed an improved Kalman filter algorithm based on quaternion correlation of color image. Kalman filter is used to predict the object motion direction and define the searching window. In the searching window, the correlation of object and the window image is calculated to get the accurate position of the object. When the object is covered partly, we can get good result, too. Experiments...
In this paper, we examine a design method for control system to attenuate periodic input disturbances using disturbance observers for time-delay plants. The disturbance observers have been used to estimate the disturbance in the plant. Several papers on design methods of disturbance observers have been published. Recently, parameterizations of all disturbance observers and all linear functional disturbance...
This paper presents a frequency-agile bandpass filter with constant absolute bandwidth and high linearity. The proposed resonator is composed of an open-ended transmission line with back-to-back varactor diodes loaded at one end. A novel mixed electric and magnetic coupling scheme is proposed to contorll the coupling coefficients in order to keep the bandwidth constant when the frequency is tuned...
The status of vehicle fault diagnosis protocols applied in the market is analyzed, and also are the problems of the hand-held diagnosis instruments. Through the way of combination of PC-style diagnosis software and Vehicle Communication Interface (VCI), the popular type of vehicle fault diagnosis system based on both K-line and Controller Area Network (CAN) is developed. The diagnosis system is divided...
The need of determining the degree of semantic similarity/relatedness between two concepts within ontology is becoming an increasingly important task in the field of Information Retrieval. Semantic similarity is only a special case of semantic relatedness. Although a great attention has been paid to design semantic similarity methods based on ontology, there has been little discussion about the methods...
As a technique for digital image tampering, copy-move forgery is frequently used. In this paper, an improved lexicographical sort algorithm based on discrete cosine transform (DCT) is developed to detect copy-move forgery. Firstly, the image is split into 8*8 blocks, and the image data undergoes a DCT. Then the DCT coefficients were grouped to reduce the dimension according to the frequency property...
In order to improve the security of steganography system, this paper presents a scheme of steganography based on fractal images. This method makes use of good properties of creation of fractal images, such as ease of generation, sensitive dependence on their initial condition, information are embedded during creating fractal images by secret information and initial parameters. The receiver can extract...
An electromagnetic linear motor with double-sided back irons is proposed in this paper. The magnetic field is formulated analytically based on magnetic vector potential and Laplace's equations. The simulation result is compared with numerical result from finite element calculation. It shows that the analytical model fits with numerical result closely. The magnetic field model is employed to analyze...
Ferromagnetic material affects the magnetic field of electromagnetic actuators significantly. This paper studies the effect of back iron on magnetic field of linear motors. Designs of linear motors with single-sided, double-sided, and without back irons are analyzed quantitatively. The magnetic field for different structures is formulated analytically based on magnetic vector potential. The simulation...
This paper presents the process of using a new approach to design online language learning materials in the context of small scale projects within Higher Education in the UK. It starts with the motivation and research aims. Then three general and relevant software design approaches are explored. After it, my own design approach is stated which may be suitable to language learning. Finally, principles...
Abstract-This paper deduces: when the current final liquidate residual of a project is greater than the next period of expected revenue, investors will choose short-term debt and take it as supervision on managers; under the corporate debt maturity structure option game equilibrium between managers and shareholders, the higher the corporate governance level, the better the legal system environment,...
The magnetization patterns of permanent magnets affect the magnetic field distribution of electromagnetic machines significantly. A tubular linear machine with double-layered Halbach arrays is proposed in this paper to enhance the magnetic flux density, and thus the force output. The magnetic field of the machine is formulated analytically with vector potential and Bessel's functions. The analytical...
This letter presents a quad-band bandpass filter using open- and short-stub-loaded resonators. The proposed filter includes two sets of resonators. One set of resonators is embedded in the other and thus the filter is compact in size. The outer ones are open-stub-loaded resonators and the inner ones are short-stub-loaded resonators. The former one is designed to not only generate the second and the...
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