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The drilling derrick in the oceanic condition is analyzed in this paper; the model of derrick vibration is built, the vibration of derrick behaves many dynamic situation under the bad condition, the axial, lateral, torsional vibration are studied, the rule of various kinds of vibration is obtained. The software ANSYS is applied in this paper, the result can be used for the actual drill case.
The road-tire friction coefficient has important role in vehicle dynamic control systems like adaptive cruise control system (ACC), vehicle dynamic control (VDC), direct yaw-torque control system (DYC) etc. This paper introduces a new predictive methodology for the estimation of road-tire friction coefficient by using Dugoff tire model and the extended Kalman filter. At the same time, a simulation...
Based on the reference to domestic and foreign correlative theories and methods, this paper uses the model of cost estimation based on cost-significant theory and neural network theory to estimate project cost. Firstly, the cost-significant theory is put forward to solve the tedious operation issues by finding out significant items to simplify the operational difficulty of engineering cost estimation...
According to the precise positioning needs of the autonomous mobile robot, a three-point precise location measurement method is presented for the mobile robot control. In this location method, the parameters measured on the ultrasonic sensors be re-demarcated and filtered by error threshold under local coordinate system, precise position of mobile robot can be achieved. The performance of three-point...
Based on the CZ series launch vehicle as research object, focused on the mathematical model of guidance calculating subsystem of launch vehicle, the simulation model of the subsystem is established in Matlab/Simulink. The subsystem is divided into a series of independent functional units, such as error compensation unit, space-borne computer unit, calculation guidance unit etc. Firstly, models for...
This paper analyzes the effects of energy price shocks from a general equilibrium standpoint of the features of modern business cycles. This study modifies a typical real business cycle model with indivisible labor by explicitly including energy as a productive input and modeling the relative price of energy as an exogenous random process. In closed models, the production technology of firms is described...
The state of charge (SOC) is the most important parameter of power battery using in electric vehicles (EVs) and is the most difficult parameter to estimate. Considering of the nonlinear character of the power battery system, the back propagation (BP) neural network method is proposed in this paper. At first, divide the working range of SOC (25%-70%) into 3 parts, the low range (25%-40%), the medium...
Organizational culture has been widely studied in management research during the past 30 years. Most culture and effectiveness researchers have employed numerous qualitative and quantitative approaches on proving that organizational culture variables can predict effectiveness or cultural variables can indicate effectiveness. Yet, few of them have done anything to construct an evaluation index system...
The non-interacting control method of permanent-magnet synchronous motor (PMSM) is proposed by using exact linearization via state variable feedback. The conditions of exact linearization are discussed with differential geometry method based on PMSM mathematic model. The PMSM linearization and non-interacting control design had been completed in the entire state variable space by state coordinates...
Fingerprint-Spectrum (FS) -Similitude (FSS) -Estimation (FSSA) is a key stage of medicine services and manages, which decides the truth, reliability, accuracy, safety, and availability of a medicine product. During developing this method people have meat problems such as too large data-volume, 2-dimensional (x- and y-axis) -float, complicated disturbance, and dependence on human-intervening, facing...
There was a problem that monitoring server (MS) maybe could not originate active communications to monitoring terminals (MT) which use private IP addresses in an on-line monitoring system for scientific instruments (OMS-SI) based on Internet/Intranet, so instant messaging (IM) used for near-real-time text-based chatting originally was introduced to provide a new communication mechanism for OMS-SI...
Highly accurate and fairly complicated tasks remotely via the Internet by teleoperation were available for expertise individuals today. But several obstacles still exist, ranging from human-computer interfacing and overcoming random time delay to task synchronization and human-robot interaction. This paper provides a new method on these challenges and some experimental results were obtained. Particularly,...
In order to quicken the affinity maturation process of detector population and improve the efficiency of network intrusion detection, this paper describes detailed vaccine operator, algorithm of adaptive extracting vaccine and immune evolutionary algorithm (IEA), and then design a novel artificial immune model and algorithm for network intrusion detection which integrates negative selection algorithm...
With the education's transition from elite education to mass education, the graduates employment market is changing from seller market to buyer market, and return on investment in human capital of the college graduates goes down, the price is seriously unequal to the corresponding value of human capital . Aimed at the practical issues, this paper focuses on all stages of human capital pricing and...
In the thesis, the scheme of the system which incorporates the transportation dispatching system with the interlocking part was designed for the industrial railway. The modeling method based on the technique of the workflow was studied to realize the automation of the working process, the general workflow net (GWFN) was defined and expanded based on the standard workflow model to model the complex...
Library management system and campus card systems are all specialized systems with great maturity. For the integration of these systems, a system integration interface technique based on the third-party interface gateway provided by campus card system is proposed. By deploying an IC card mediator program on the terminal machines for book borrowing, the mediator program will communicate with the gateway...
As an important part of knowledge management (KM), the KM performance evaluation tries to find out the key factors restraining the enhancement of the enterprises' performance. In this paper, some primary factors of the performance of enterprises KM are analyzed and an index system of KM performance is established by considering some aspects, such as marketing capability, information management, maturity...
In this paper, taking example for closed cup flash point testing, a 3rd order model is presented to describe the dynamic characteristic of sheathed Pt100 sensor for the first time, to solve the problem that there are dynamic characteristic discriminations between the Pt100 temperature sensor and the mercury thermometer, which bring errors to measuring. The mathematical models of sheathed Pt100 sensor...
In order to enhance the real time operability and efficiency of polling which are both crucial for network fault management, the current network polling schemes based on SNMP are discussed, and a novel dynamic polling scheme is put forward. By soft partition of variation amplitude concept and uncertainty reasoning based on cloud model, this scheme realizes the fine dynamic adjustment of polling intervals...
A new type of distributed constant false alarm rate(CFAR) scheme based on fuzzy logic and Ordered Data Variability CFAR(ODV-CFAR) algorithm is proposed in this paper. In this scheme, each ODV-CFAR detector computes the membership function value mapping to the false alarm space from the samples of reference cells, and transmits it to the fusion center. These values are combined according to fuzzy fusion...
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