European options can be divided into the call option and the put option. In this paper, the models of call option and put option are studied by using Mellin Transform Solution. Then generalize the model of European option and also use Mellin Transform to analyze the solution. It fully reflects the Mellin transform using for economic model.
This paper studied two balancing problems of the automobile assembly line, built balancing mathematic model of the assembly line by the linear programming theory. The mathematic models were applied to the automobile chassis assembly line of one automobile company. It could be divided into the following steps: the assembly content was first converted into a priority relation map of the work sequence, meanwhile, the corresponding assembly data was stored into a text file for the coming reading, the LINGO8.0 was used to make program according to those two mathematic models, then the minimum working station number and optimization product time was calculated respectively, finally the balancing delay guide line was used to estimate the conditions and determine whether the balance demands were satisfied.
The author designs a volcano smoke planar ultra-wide band antenna, which is composed of the planar volcano smoke antenna and the resistance loop circuit. The lower cut-off frequency of the antenna bandwidth is studied. The return loss (S11) of the input port of the antenna is measured. The research finds that the lower cut-off frequency of antenna with and without resistance loop circuits is 0.5GHz and 0.8GHz, respectively. The results show the resistance loop circuit can expand the bandwidth of the antenna toward the lower frequency direction.
The current method for test CPU module is to load the Built-in-Test program in IDE 386 software, which is used to test all the performance of CPU module, and must run under Windows 98 operation system. But now because the most computers install the windows XP operation system, if the above method is used, so it's needed to install two operation systems on test computers. In order to realize the automatic test, CPU Module Test Device (CMTD) is designed and developed, which is used to test CPU module with various types and buses automatically. The virtual instrument PXI architecture is used to design the CMTD and simulate CPU bus signals, designed adapter is used to connect CPU signals with PXI bus module. Test-Item configuration file is used to describe the Test-Flow, and the Intel command is sent to CPU through RS-232 interface, the open-circuit and short-circuit test of all the CPU signals is realized using the propose of matrix switch and multimeter. Test software is designed under the graphical LabVIEW platform, and which realized the functions of system self-test, system calibration, Built-in-Test, covering test, test result query and report generation. Now the device is in use on CPU module production line, which improves the detection efficiency of CPU modules.
The electrochemical corrosion behavior of HRB500 steel bar in Simulated Concrete Pore (SCP) solutions contaminated by bicarbonate ions and (or) chloride ions was investigated by cyclic potentiodynamic polarization technique, and it was compared with that of HPB235 steel bar. The results show that the passivation and repassivation of HRB500 steel bar is remarkably in the conditions where pH is 12.5 and w(NaCl) is 0~0.1%, or pH is 11.5 and w(NaCl) is no more than 0.01%, or pH is 10.5 and w(NaCl) is less than 0.005%. These are almost similar to that of HPB235 steel bar. However, with the increase of the aggressivity of SCP solutions, the corrosion susceptibility of HRB500 to pH and chloride ions is greatly higher than that of HPB235. The threshold value of chloride ions is considerably decreased with the increase of carbonization. If the connection of HRB500 and HPB235 was exposed to the aggressive environments, HRB500 is anode which is corroded acceleratedly, and HPB235 steel bar is cathode.
Based on the study of composition and characteristics of navigation simulator visual system, this essay considered simulation development process that based on Creator and Vega. The key technology of scene simulation has been introduced; the model construction and real-time optimization have been realized, and marine meteorological and special effects are established, finally the program flowing was showed. The results of simulation experiment shows that the simulated effect of navigation simulator that based on Creator and Vega are not only realistic, but can substantially reduce source code compiling, and develop with higher efficiency.
A novel spatial parallel manipulator with two-translational and one-rotational degrees of freedom is represented in this paper. The mobility of the mechanism is analyzed and computed by use of the screw theory. The direct and the inverse analytical position solutions are derived and the veloctiy analysis are addressed. Since the Jacobian matrix, mapping the input velocity vector of the actutated joints to the output vector of the moving platform, is a diagonal matrix, the manipulator is an uncoupled one. There exists one-to-one corresponding controlling relationship between one of the input velocities and one of the output velocities. Therefore, the path planning and controlling design of the manipulator will be very sinple. In addition, the singularities of the manipulator are discussed based on the Jacobian matrix method.
By introducing the concept of weights in NURBS curve into a blending technique, the paper extends the representation of the rigonometric spline curve. Shape-control capability of the extension curve is shown to be much better than that of the trigonometric spline curve. The representation and properties of the extension curve are studied. The curve is easy and intuitive to reshape by varying the tension parameters; So it is useful in some applications of CAD/CAM.
In order to resolve the secure distribution problem in Email system, a novel encryption scheme with wildcards is proposed, which adopts the Identity-based public key cryptography technology. This new scheme has private key size linear with the identity depth and is built in standard model. Furthermore, the scheme is proved secure against chosen plaintext attack under Bilinear Diffie-Hellman Inversion (BDHI) assumption.
A 3-DOF special transposition manipulator, which can grab fern thickness was designed. By using software of Solidworks, the virtual prototype of the manipulator was setup. Then the manipulator's kinematics equations were set up and solverd by the method of D-H based on the software of ADAMS, the mechanism was simulated and analyzed, then its endeffector's displacement, velocity curve were obtained, which provides an important reliance for the control of the manipulator. And the correctness of kinematids model is verified by simulation results.
The quantum super magnets is researched by Green function theory in this paper, the problems in the quantum super magnets are settled by particle and spin Green function theory, especially settling the orderly magnetic of quantum. The application of Green function in the ferromagnetic and reverse magnetism and magnetic ferrous are maily studied.
Collaborative optimization is a good method for solving multidisciplinary optimization design of the complex system. Satellite design is a complex and systematic project, the efficiency of the traditional optimization design methods are not efficiently. Recently cloud computing has been widely used in intelligent control, data mining, optimization computation and the other fields. The normal cloud model based on the normal distribution is an important cloud model for cloud computing and has been a wide range of adaptability. In this paper, the normal cloud model is in combination with collaborative optimization. With the structure of the collaborative optimization, the velocity and direction of optimized search can be controlled by the cloud droplets generated by the normal cloud model. Numerical results indicate the high quality of the algorithm on precision stability and convergence rate and improve the efficiency of the satellite optimization design.
The purpose of this paper is to propose a new algorithm which is based on combining the linear model and the method about smooth exponential. It is used to simulate the AR model of the Single sliding window sequence of observations and gets the average value of the square of slide window observed values' residual noise and achieve the previous statistics on the latter statistic forecast with exponential smoothing method so as to decide whether the network traffic is normal or not. This algorithm is more efficiently comparing with GLR method and more reliable comparing with smooth exponential method, and has been proved is effectively in the detection for network traffic anomalies.
With the application of the large capacity ESP in deep well and high temperature well, first to raise the submersible motor power, next also to improve thrust bearing load and temperature capability. This development tilted pad thrust bearing to replace the original fixed pad thrust bearing, because of oil film produced on the surface of tilted pad through adjusting the angle of tilted pad to ensure operation of motor at high temperature and load. While the tilted pad can not generate oil film, and locking burned. The operation problem of submersible motor at high temperature and load has been solved by adopting tilted pad thrust bearing, according to structural characteristics of submersible motor, The principle of oil film formed on surface of tilted pad is analyzed and all parameters such as oil film thickness, oil film pressure, friction resistance, motor oil flow rate and temperature rise and so on are calculated through the system model of tilted pad bearing, According to the data, this thrust bearing designed and manufactured has been tested in laboratory and field, test prove: the performance of tilted pad than the fixed pad thrust bearing has been greatly improved to meet demand of high-end ESP for long-term stable operation.
This paper refined the traditional whitening-weight function using the cloud model, which is a representation of both fuzziness and stochastic, and could take a bi-directional conversion between qualitative and quantitative. In this way, a grey-cloud clustering model is proposed for the comprehensive ranking evaluation of flood disaster. The novel method is applied to evaluate the 45 flood disaster cases of several provinces in 1989~1999, and takes the amount of building collapse, affected area, number of victims, direct economic loss as evaluation indicators. The result shows that this method has much rationality and utility for flood disaster evaluation.
Construction and visualization of three-dimensional (3D) complicated objects has become an important task in many GIS and their applications. Main process to construct a true 3D virtual scene with the programmable visualization environment OpenGL for water conservancy works is introduced. A simulation system developed by the authors is presented for importing, filtering and visualizing of complex geographical related data. Culling, lighting, shading and antialiasing were introduced to enhance the 3D visualization effects of the objects. Aspects like presentations of data with spatial dependence, virtual roaming in the terrain and geographical frame of reference and in time, interaction techniques are presented.
A modified variability index (MVI) CFAR detector is presented. The MVI is a combination of the cell averaging (CA), greatest-of (GO), and modified trimmed mean (MTM). The analytic expression of its threshold multiplier factor TMTM is also derived. Under SwerllingII assumption, the MVI is evaluated and compared with the CA, OS, VI and OSVI (order statistic VI) through Monte-Carlo simulation in various environments. In homogeneous background and clutter edge environment, the MVI keeps the good performance of VI. In multiple targets background, the MVI performs robustly, which is similar to OS. In addition, the MVI shortens the sample sorting time of the OS and the OSVI.
This paper produces a C-space layered search arithmetic for a typical of manipulators with vertical multi-joint in series. The work divides the C space into many layers based on the dimension, and implements the rapid creation of C-space grid map on each layer. After generating the C-space grid map of the first layer, the system searches and produces the C-space grid map of next layer. There is no need for the system to know the entire C-space. This arithmetic avoids the great amount of the calculation and the large demand of the memory space of C-space grid map caused by the dimensions explosion of the multi-joint manipulator, makes sure that the searching processing be quick and complete.
A solution for measuring the dielectric spectroscopy of conductive aqueous solution at low and medium frequency is recommended here. The measuring system mainly consists of waveformer, four electrode probe, vector voltmeter and DSP as a controller. Electrode polarization causes serious problem in measuring the capacitance of conductive liquid when the frequency is below 200kHz. Four electrode probe is developed to solve the problem for the current is flow through the outer pair of electrodes, the inner pair of electrodes measures the voltage drop of the solution. The current flow through the inner pair of electrodes must be strictly controlled, for electrode polarization will become serious as the current increases.
It is effective to analyze the camshaft strength through FEA method during the design phase. The dynamic loads on camshaft could be got by using one-dimensional dynamic simulation on valve train. Then the three-dimensional transient dynamic FEA could be carried out, when the one-dimensional simulation result was as input loads. The strength evaluation of camshaft could be crarried out after the stress course was calculated. With practical experiments, this method is proved effective to check design scheme and provide reference for choosing camshaft material.
