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Feature matching is a crucial research in computer vision. For realizing the effective and accurate feature matching for the feature points in the images of chessboard calibration target used in the wheel alignment system, the popular calculation algorithms are analyzed. The traditional polar constraint and polar equation for solving the problem constructing the relationship between corresponding...
Considering the disability of calibration theories and methods for the tester of automobile wheelbase difference, mechanical analysis of the vehicle stability is employed to dedicate the negative influences of wheelbase difference. A novel device can realize calibration of the wheelbase difference within the range of 0-40 mm by variable wheelbase mechanism is proposed. Two diagnosis systems which...
The research suggests a conceptual model about the impacts of relational embeddedness on the technological firm innovation performance through exploratory learning, and examines the influencing mechanism among relational embeddedness, exploratory learning and technological innovation performance by carrying out studies on 178 manufacturing firms. The hypotheses in the research are partially supported...
The success of VANET safety mechanisms, e.g. pre-crash warning and collaborative collision avoidance, relies on good proximity-awareness of each subject vehicle. Prior analysis shows that a self-information dissemination control on each car, which adapts communication rate based on estimation error and channel congestion, can achieve higher tracking accuracy than others in a multi-access channel....
The research of calibration model for the wheel alignment system is a crucial area for automobile safety. For the disability of calibrating measurement results of wheel alignment system, the theoretical errors based on the superposition principle are analyzed. Simulation results show that the errors are more than 0.4deg whereas the common precision of wheel alignment system is 0.02deg. Novel calibration...
Focal length of multi-core image fiber is a crucial parameter for the performance of fiberscope. In this letter, we present a novel method that includes simulating the transmission process of waveguides by inputting a plane wave in the wavelength of 0.5 mum in cores using finite-difference time-domain (FDTD) method, integrating the power outputs in the end of the core and conforming the numerical...
Caffeine is consumed by most people in Europe and North America. As a risk factor for osteoporosis, caffeine has been reported to decrease bone mineral density, negatively influence calcium absorption and increase the risk of bone fracture in women. Except for the epidemiological observations and several studies which proved caffeine’s unfavorable effects on osteoblast proliferation and impaired ability...
A new kind of sensor for measuring force in arbitrary direction to test force's value and direction with a dimension Oslash53 mm times h8.2 mm, developed for dental surgery measurement, has been proposed in this article. A four-beam structure is employed for arbitrary force test. Based on material theory the value and direction of force can be calculated by strain test. A matrix that proves the four-beam...
Field measurements were made of vehicle to roadside communication performance at two roadside dedicated short range communication sites in San Francisco. Portable equipment allowing the recording of data gathered from multiple radios on a single vehicle used the wireless access in a vehicular environment radio modules produced by Denso according to the specifications of the crash avoidance metrics...
We consider the problem of adjusting transmission power for vehicle-to-vehicle broadcast safety communication in vehicular ad hoc networks. Given a target communication range designated by a vehicle safety application, the power control algorithm is designed to select a transmission power no greater than necessary for the targeted range. The power control algorithm results in higher communication...
Global manufacturing network (GMN) is a new manufacturing system, which provides great opportunities for local firms in developing countries to acquire knowledge and upgrade through collaborations in GMN. This paper hypothesizes that local firm's potential absorptive capacity has a positive impact on its knowledge acquisition in GMN, and the association between them is moderated by network embeddedness...
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