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Based on the interleaving technique, a general design of orthogonal sequences with alternate periodic correlation values equal to zero is proposed. The proposed sequence set can be divided into two groups. In addition to traditional orthogonal properties, the periodic auto-correlation functions (ACFs) and intra-group cross-correlation functions (CCFs) of the designed sequences take zero at any odd...
In accordance with national policy reform the grain circulation characteristics, combined with e-commerce BtoB technology Carried out grain circulation Trade, the analysis and research on e-commerce BtoB technology, site structure, function and operation mode, on this basis, Make recommendations and institutional innovations, the technology bring a good economic and social benefits for China's grain...
A class of multiphase sequences with periodic odd-shift orthogonal properties is presented. The constructed sequences are based on interleaved DFT matrix and their periodic autocorrelation function (ACF) is 0 for all odd shifts. These sequences can be divided into multiple groups. The intra-group periodic cross-correlation function (CCF) values are alternately zero and the inter-group periodic CCF...
In a wireless communication system, sequences with impulsive periodic autocorrelation correlation, known as perfect sequences, are widely applied to, e.g., such sequences can be made use of as synchronous signals. In this paper, based on interleaving technique, a novel construction of distinct perfect polyphase sequences (PSs) is presented. The proposed perfect PSs possess the same phase alphabet...
In the paper, a mobile robot, which consists of a conventional four-wheel independent propulsion and individual steering system and a 5th steerable propulsive wheel, has been presented. The robot is able to achieve multiple prototypes with different wheelbase, wheel stance, clearance, and altitude of center of gravity by reconfiguration, and obtain diversified locomotive modes through the control...
In this paper, the framework of hierarchical parallel control architecture based on competitive mechanism is highlighted to present reconflgurable hardware logic and algorithms of network-based motor control, and application for the open mobile robot's control system is demonstrated to address a special kind of strong coupling of mechanical and electrical hardware, the interchange of propulsive wheel...
In continuous integration, a tight integration of test case prioritization techniques and fault-localization techniques may both expose failures faster and locate faults more effectively. Statistical fault-localization techniques use the execution information collected during testing to locate faults. Executing a small fraction of a prioritized test suite reduces the cost of testing, and yet the subsequent...
As terrain provides the only and powerful thrust to a mobile robot, design with consideration to terrain is most important, particularly for the robot in sandlot or the soft soiled environment. A trade-off design based Terramechanics about a reconfigurable mobile robot is proposed based on Multi-Objective Optimization (MOO) with respect to Terramechanics. A novel analytic projection method is proposed...
Cloud computing is an emerging computing paradigm. It aims to share data, calculations, and services transparently among users of a massive grid. Although the industry has started selling cloud-computing products, the software engineering infrastructure and application model are still unclear. In this paper, we compare cloud computing with service-oriented computing and pervasive computing. Both the...
A general construction of grouped complementary (GC) codes for multicarrier CDMA systems is proposed. The construction is based on perfect codes which have ideal periodic autocorrelation function. Different from traditional complementary codes, the constructed GC codes are divided into multiple code groups. The codes in the same group have ideal correlation properties and those from the different...
Recent techniques for fault localization leverage code coverage to address the high cost problem of debugging. These techniques exploit the correlations between program failures and the coverage of program entities as the clue in locating faults. Experimental evidence shows that the effectiveness of these techniques can be affected adversely by coincidental correctness, which occurs when a fault is...
A mobile robot prototype with independent propulsion and individual steering (4WD4WS)has been developed. The mission-oriented mobile robot has the adaptability of terrain, sensors and payload with the scope of 20 kilograms. Different prototypes with diversified wheelbase, wheel stance, clearance, stability margin and altitude of center of gravity can be achieved by reconfiguration. A wheel with high...
In this paper, a novel analytic projection method is proposed to calculate the prototype parameters of the reconfigurable mobile robot. The equivalent latitudinal and longitudinal stability margins of the mobile robot are investigated with non-linear characteristics. The Harmony Search (HS) method is also applied to obtain the optimal configurations.
A planar integrated bandpass filter (BPF) structure that makes use of a quarter-mode substrate integrated waveguide (QMSIW) technique is presented in this work for the first time. The proposed bandpass filter is composed of cascaded QMSIW cavities, which are magnetically coupled with the neighbourhood sections. The quarter-mode structure of SIWs makes the overall size largely reduced so it is possible...
In this paper, an adaptive technique employing hierarchical M-ary quadrature amplitude modulation (M-QAM) constellations with space-time block coding (STBC) is investigated as a link layer solution to the simultaneous voice and different classes of data transmission problem over multiple-input multiple-output (MIMO) fading channels. Closed-form expressions as well as numerical and simulation results...
Based on circular conjugate symmetry properties (CCSP) of discrete Fourier transform (DFT), a novel approach to nonorthogonal frequency division multiplexing (NOFDM) is presented. Different from other NOFDM systems, a simple estimation algorithm is exploited in the receiver instead of maximum likelihood sequence detection (MLSD) while the bit error rate (BER) of the proposed system is similar to those...
Fault localization is a major activity in software debugging. Many existing statistical fault localization techniques compare feature spectra of successful and failed runs. Some approaches, such as SOBER, test the similarity of the feature spectra through parametric self-proposed hypothesis testing models. Our finding shows, however, that the assumption on feature spectra forming known distributions...
Predicate-based statistical fault-localization techniques locate fault-relevant predicates in a program by contrasting the statistics of the values of individual predicates between successful and failure-causing runs. While short-circuit evaluations are common in program execution, treating predicates as atomic units ignores this fact, masking out various types of important statistics. On the contrary,...
The availability of high accuracy GCPs (ground control points) and DEMs (digital elevation models) becomes the key issue for successful implementation of an image orthorectification project. It is a very difficult task for collecting a large number of high quality GCPs by using traditional methods to meet all the requirements for digital photogrammetric and orthorectification process. Airborne light...
With the fast development of cognitive radio, best decision problem in cognitive radio receives considerable attention. This paper introduces the research of cognitive radio. Genetic algorithm and itpsilas applications in decision maker are introduced. Based on biologic evolution principle, genetic algorithm can get the system best parameters by dominant character. The cognitive cycle and genetic...
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