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Antenna array synthesis with a minimum number of antenna elements is of interesting in many applications. In this work, a method based on regularized FOCUSS, for the design of sparse arrays is proposed. The proposed approach can give the locations and amplitudes of these sparse elements at the same time. Numerical simulations show the high accuracy of achieving the desired radiation pattern with maximally...
In current days, the business environment is more competitive and changing faster than ever before, so it is important for employees to learn new knowledge related to their business quickly and efficiently. Meanwhile, the personalized e-learning system makes it possible for employees to discover a personalized learning path in order to improve the learning efficiency. For business in a company, it...
The complexity of technology and structure of equipments increasing significantly raise challenges in equipment diagnosis. Extensive researches make us recognize that Design for Testability (DFT) must be carried out concurrently with functional design of equipments in order to fundamentally solve these problems. Diagnostic strategy design, as an important aspect during DFT, is crucial for reducing...
CAPTCHA is a test that can tell humans and computer programs apart automatically. The aim is to allow the server to identify the visitor is a human or a computer, and only provide services to human. It can improve the current server system and user information security. The static plane visual CAPTCHA based on OCR problems with the advantages of implementation and operation[1] become the mainstream...
In order to avoid tremendous attack from malicious computer programs, CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart) mechanism has been introduced to distinguish humans and computers. Due to the fast development of pattern recognition and artificial intelligence technology, there are increasing safety loopholes concerning traditional 2D static CAPTCHAs, resulting...
Yard crane scheduling is the vital problem affecting the operational efficiency of container yard directly in the container terminal. This paper addresses yard crane scheduling problem. Firstly the mathematical model of yard crane scheduling is presented, which takes loading time, reshuffling time and waiting time of yard cranes into account. Then the hybrid intelligent algorithm GATS, which is combined...
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