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Generally speaking, the mobile robot is capable of sensing its surrounding environment, interpreting the sensed information to obtain the knowledge of its location and the environment, and planning a real-time trajectory to reach the object. In this process, the issue of obstacle avoidance is a fundamental topic to be challenged. Thus, a switching path-planning control scheme is designed without detailed environmental information, large memory size, and heavy computation burden in this study for the obstacle avoidance of a mobile robot. In this scheme, the robot can gradually approach its object according to the motion tracking mode, obstacle avoidance mode, self-rotation mode, and robot state selection designed by learning and expert rules for enhancing the tracking speed and adapting to different environments. The effectiveness of the proposed adaptive path-planning control scheme is verified by numerical simulations and experimental results of a differential-driving mobile robot under the possible occurrence of obstacle shapes. 相似文献
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The traditional focus of intergovernmental services research has been on technological development, not on user acceptance; yet user acceptance of intergovernmental services in each electronic government (e-Government) implementation affects the ultimate success of the e-Government project. In the e-Government implementation context, many governments have invested huge amounts of money and manpower to make intergovernmental services both available and user-accepted, although some individuals have no intention of using them. The electronic document management system (EDMS) is the most popular intergovernmental service in the e-Government project. Thus, e-Government researchers need to identify the factors that determine user acceptance of EDMS. 相似文献
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Ruey-Shun Chia-Ming Marilyn M. Wen-Jang 《International Journal of Information Management》2008,28(5):366-378
Strategic alignment involves the development and reconfiguration of information technology (IT) to support business strategies. This paper applies the dynamic capabilities perspective to analyze the strategic information system alignment process. The paper further argues the approach is constructive in understanding and overcoming difficulties in achieving and sustaining alignment. From a longitudinal case study of a semiconductor company in Taiwan, the results show an unaligned strategic information system (with an implemented IT strategy that varies from the intended IT strategy) impedes the development of IT. Path dependence, or the implications of prior IT decisions, is another barrier for alignment. A broader view of intended alignment, focusing on IT combined with clear business vision, can be beneficial for adding future IT resources. In addition, dynamic capabilities, which are critical for the creation and strength of IT resources, positively influence the alignment process and its future implementation success. 相似文献
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The traditional focus of e-government services research has been on non-mobile services but now with the incorporation of mobile services more people are able to access these Mobile e-government services (m-government services). In addition, such services are critical for improving user-to-government communication effectiveness and maintaining relationships. The purpose of this study is to identify the factors that determine user acceptance of these services. Based primarily on the theory of planned behavior and supplemented by the mobile communication perspective, a sample of 331 users of m-government services in Taiwan was tested. The findings show that perceived usefulness, perceived ease of use, trust, interactivity, external influence, interpersonal influence, self efficacy, and facilitating conditions are critical factors. This study has given us a better understanding of critical mobile communication factors in improving user acceptance of m-government services. Implications and recommendations for research and practice are also presented and discussed. 相似文献
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Hsin-Yin Peng Chia-Ming Yang Yu-Ping Chen Hui-Ling Liu Tsung-Cheng Chen Dorota G. Pijanowska Po-Yu Chu Chia-Hsun Hsieh Min-Hsien Wu 《Biomicrofluidics》2021,15(2)
To develop a lab on a chip (LOC) integrated with both sensor and actuator functions, a novel two-in-one system based on optical-driven manipulation and sensing in a microfluidics setup based on a hydrogenated amorphous silicon (a-Si:H) layer on an indium tin oxide/glass is first realized. A high-intensity discharge xenon lamp functioned as the light source, a chopper functioned as the modulated illumination for a certain frequency, and a self-designed optical path projected on the digital micromirror device controlled by the digital light processing module was established as the illumination input signal with the ability of dynamic movement of projected patterns. For light-addressable potentiometric sensor (LAPS) operation, alternating current (AC)-modulated illumination with a frequency of 800 Hz can be generated by the rotation speed of the chopper for photocurrent vs bias voltage characterization. The pH sensitivity, drift coefficient, and hysteresis width of the Si3N4 LAPS are 52.8 mV/pH, −3.2 mV/h, and 10.5 mV, respectively, which are comparable to the results from the conventional setup. With an identical two-in-one system, direct current illumination without chopper rotation and an AC bias voltage can be provided to an a-Si:H chip with a manipulation speed of 20 μm/s for magnetic beads with a diameter of 1 μm. The collection of magnetic beads by this light-actuated AC electroosmosis (LACE) operation at a frequency of 10 kHz can be easily realized. A fully customized design of an illumination path with less decay can be suggested to obtain a high efficiency of manipulation and a high signal-to-noise ratio of sensing. With this proposed setup, a potential LOC system based on LACE and LAPS is verified with the integration of a sensor and an actuator in a microfluidics setup for future point-of-care testing applications. 相似文献
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