Considering the most common cases in the test suit, a dependence test method for loop parallelization is designed based on the Banerjee-GCD and Banerjee-Bound methods. It is found out that not all the dependence direc...
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Considering the most common cases in the test suit, a dependence test method for loop parallelization is designed based on the Banerjee-GCD and Banerjee-Bound methods. It is found out that not all the dependence direction contribute equally to loop parallelization. A test of a small portion of the whole set of dependence directions covers most loop inter-iteration dependence. So these directions are tested to reduce the time complexity of the algorithm. The information got in GCD and Bound test can be used to extend the original algorithm. The main idea is: GCD test can find out a set of possible dependence vectors, then Bound test could check each bits of the vector and eliminate some dependence directions, which in fact does not exist. Furthermore, the information can be exchanged between GCD and Bound test to get more efficiency from the original one. The original GCD and Bound test method can be extended to make it support non-linear equations. By integrating these two dependence test method into one single algorithm and make the maximum use of them, a fast and ambitious dependence test method for the purpose of program parallelization can be provided.
Several mistakes in Transparency Lemma and Soundness Theorem proved by Bijlsma (1989) were pointed out by proposing some counter examples. Furthermore, the authors reproved the above results using intuitive methods wh...
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Several mistakes in Transparency Lemma and Soundness Theorem proved by Bijlsma (1989) were pointed out by proposing some counter examples. Furthermore, the authors reproved the above results using intuitive methods which are easier to be understood.
programming (matching) problem of center of gravity (C.G.) and pressure center (P.C.) for air-air missile directly effect maximum available overload, maneuverability, characteristics of moment of force and scheme and ...
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programming (matching) problem of center of gravity (C.G.) and pressure center (P.C.) for air-air missile directly effect maximum available overload, maneuverability, characteristics of moment of force and scheme and implementation of control system for the missile. The programming criteria were built from various relative consideration, such as aerodynamic properties, flight performance, power plant characteristics and control system design. Available maximum overload estimation was provided, which is used to verify whether design of thrust curve and programming of C.G. and P.C. is reasonable. The design procedure according to programming criteria for C.G. and P.C. was introduced. Design example for wingless trust vector control missile was given, the results have shown that available maximum overload may satisfy requirement of missile maneuver and characteristics of moment of force coincide with design requirement of control system throughout reasonable programming of C.G. and P.C.
In developing object-oriented (OO) software, the first important thing is to identify objects and define the model of communicating relationships between objects. While designing objects the authors again have to anal...
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In developing object-oriented (OO) software, the first important thing is to identify objects and define the model of communicating relationships between objects. While designing objects the authors again have to analyse by what relations the subobjects are connected together. So it is of utmost importance to study the relationships between objects in OO system for finding out object analysing criteria. But up to now it still is a very confusing respect on the naming, definitions and the usage of relations among objects. This paper is for the purpose of discarding the confusion. To this end, a 3-dimensional relation model (3DRM) is suggested. In the 3DRM framework, a series of relations among objects are discussed, and a clear relation hierarchy is performed. Therefore the foundation is established for further study of the OO software development methodology (OOM).
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