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Stroke is one of the most common causes of death and long-term disability worldwide. People with motor disabilities caused by stroke experience limitations in performing daily tasks independently, and traditional rehabilitation programs have tediousness and accessibility problems for the patients. It is essential to develop novel and convenient rehabilitation systems to help people with motor impairment...
This study aimed to investigate the feasibility of the directed cyclic graph (DCG) in the feature selection and modeling of dampness syndrome to objectively diagnose chronic gastritis (CG). The diagnostic information of patients with dampness syndrome was selected from 919 cases collected in our previous study. Relevant characteristic variables were chosen using the combined rough set and mutual information...
In distributed drive electric vehicle (DDEV), electric motors are connected to each wheel separately, the drive/brake torque of each wheel can be independently and precisely controlled. According to this characteristic, a control strategy of emergency steering return based on driver's intention is developed. Firstly, a steering return recognition model is designed to discriminate the driver's intention...
The hierarchical control strategy is one of the most widely used strategies for vehicle dynamic control (VDC) implemented in electric vehicles (EVs). This paper describes the design of a novel reference model based on the structure of hierarchical VDC controller. This model can facilitate good handling performance under normal operating conditions and enhance stability under critical conditions. It...
The yaw stabilization in distributed-motor drive electric vehicles is usually based on hierarchical control structure, namely an upper-level motion following controller and a lower-level control allocation scheme. The existing strongly coupling property of tire forces gives rise to extreme difficulty in solving the control allocation problem for its nonlinearities in the moment/effector relationships,...
To avoid detection or attack, electric field signal characteristic of ships should be controlled. The signal data is decomposed into low frequency component and high frequency component first. The high frequency component is predicted by RBF neural network, the low frequency component is predicted by GM (1,1) model and add up both of the values predicted. Then countercurrent is exported and then the...
Research shows that haptic rendering leads to a more realistic virtual reality system. Being an important part of the system, human operator directly affects the stability of haptic rendering. In this paper, the influence of human, i.e., the mechanical impedance of his arm, on the stability of haptic rendering is studied through experiment with virtual wall haptic system based on FALCON device. Several...
With the development of virtual reality technology, tactile technology has attracted more and more attention. Vibrations between two flat plates have been proven to be able to create a squeeze film of air between the two plate surfaces, which can reduce their contact friction. In this paper, a learning and cognitive system based on above mechanism is presented, which consists of actuator & plate...
This paper presents a portable environment detection system based on dynamic vibrotactile feedback. A stereo image-acquisition module with two cameras is used in the system to obtain the information of obstacles in the environment, which is further provided to the user through sense of tactile. An actuator module with several motors is utilized to generate the desired vibrotactile feedback through...
The three-dimensional temperature field of the coal-bed methane with heat injection was numerically calculated by ANSYS. The calculated results revealed that the temperature, the thermal gradients and the thermal flux vector sum of the coal-bed near the injection well was higher, while was smaller at the other area of Coal-bed Methane (CBM), which indicated that the coal-rock was not affected by heat...
Haptic rendering provides users with the senses of touch during their interacting with the simulated objects in virtual environment. The maximum achievable object stiffness is critical for realistic haptic rendering of rigid objects, and is constrained by several inevitable ”non-idealities” in the haptic system as well as the behavior of the human operator, i.e. the mechanical impedance of human arm...
This paper explores the question of analysis and generation of traditional dwellings using computer aided design. Many research studies show the traditional Chinese Bamboo Houses in text, photographs and movies. Our approach is to research the design of various Bamboo Houses using grammatical analysis. The rules and styles of these dwellings can be preserved as formal grammars. Formal grammars can...
For the sake of wind energy exploitation, the Fifth Generation Mesoscale Model (MM5) has been applied to downscale 2.5deg reanalysis data provided by the National Centers for Environmental Prediction (NCEP) and the National Center for Atmospheric Research (NCAR) onto a 3.3-km grid covering the fuel-poor Jiangsu Province for the three representative years, 1972, 1997, and 2000 respectively. The simulated...
Rendering rigid virtual objects remains a challenging problem in the field of haptics. The "nonidealities" due to time discretization and position quantization are the main factors that constrain the maximum achievable stiffness for the virtual objects. While the former can be addressed with many methods, the latter becomes a critical problem. New simulation methods, smoothing the output...
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