With the increase of power transmission current electromagnetic environment around transmission lines has drawn so many attentions in recent years. This paper aimed at exceeds high-voltage current capacity to construc...
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With the increase of power transmission current electromagnetic environment around transmission lines has drawn so many attentions in recent years. This paper aimed at exceeds high-voltage current capacity to construct physical model of transmission line calculation of the magnetic field distribution. Magnetic field distribution around transmit electricity lines was calculated and analyzed based on domestic and international environmental standards. Simulations indicate that the region outside 7 m around the center axis met requirements. If current continues ascend, effect by the power frequency magnetic field will continue to expand.
Because of text's properties, it's so difficult to find perfect algorithms of embedding watermark into text documents, when compared with other media. Nowadays, text watermarking technologies is far behind oth...
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Because of text's properties, it's so difficult to find perfect algorithms of embedding watermark into text documents, when compared with other media. Nowadays, text watermarking technologies is far behind other multimedia watermarking technologies such as images, audios, etc. A novel text digital watermarking technology based on graph theory is presented in this paper. Through changing its topology structures of a character or string, different figures are schemed out, which represent the same semanteme. Then those figures are mapped on graphs of graph theory, and the graphs or their properties should be correctly encoded in order to denote different watermarking information. The mathematic models of embedding and detecting watermarking are also described, and the experimental methods of robustness and visual influence, as well as the relative results are given. Finally, general rules of removing attack on text watermarking system is proposed, and the attack-resisting capability and methods of this text digital watermarking is analyzed in detail. According to the experimentation and analysis, the text watermarking technology has the following advantages: great capacity of watermarking, strong robustness, little visual influence and quite good attack-resisting capability. With this technology, it is more convenient to embed watermark into characters for ideograph languages such as Chinese and Korean, while it is suitable for embedding watermark into strings for alphabetic languages such as English and French.
In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hyd...
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In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hydraulic code to realize the coupling of neutronics and thermal-hydraulics. In CFMHEX, all these feedback effects such as burnup, power distribution, moderator density, and control rod insertion are considered. The verifica- tion and validation of the code system have been examined through the IAEA WWER-1000-type Kalinin NPP benchmark problem. The numerical results are in good agreement with measurements and are close to those of other international institutes.
An intranodal flux expansion nodal method (FENM) for solving static and transient neutron diffusion equations in hexagonal-z geometry has been developed, in which the flux distributions are expanded into a set of anal...
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ISBN:
(纸本)0894486977
An intranodal flux expansion nodal method (FENM) for solving static and transient neutron diffusion equations in hexagonal-z geometry has been developed, in which the flux distributions are expanded into a set of analytic basis functions and orthogonal second-order polynomials. In order to improve the nodal coupling relations, a new type of nodal boundary conditions is proposed, which requires the continuity of both the zero- and first-order moments of partial currents across the nodal surfaces. The numerical results for a series of benchmark problems demonstrate that FENM exhibits good accuracy and convergence.
china Integral reactor Plant (CIP) is a light water cooled, 300 MW power reactor under development by Chinese National keylaboratory of reactorsystemdesigntechnology. CIP features an integral reactor vessel that c...
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china Integral reactor Plant (CIP) is a light water cooled, 300 MW power reactor under development by Chinese National keylaboratory of reactorsystemdesigntechnology. CIP features an integral reactor vessel that contains the CRDM and major reactor coolant system components including reactor core, coolant pumps, once-through steam generators and pressurizer. This integral design approach eliminates the large coolant piping and large loss of coolant accident (LOCA), and thus provides with higher level of securities. This paper introduces the selection of CIP containment system, the design of containment, the determination of design pressure for containment and the calculation analysis of containment structure.
In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hyd...
详细信息
In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hydraulic code to realize the coupling of neutronics and thermal-hydraulics. In CFMHEX, all these feedback effects such as burnup, power distribution, moderator density, and control rod insertion are considered. The verification and validation of the code system have been examined through the IAEA WWER-1000-type Kalinin NPP benchmark problem. The numerical results are in good agreement with measurements and are close to those of other international institutes.
From the Flow-Induced Vibration(FIV) point of view,throttle orifice can be considered as one of the essential singularities in the system that disturbs the flow and causes structure *** nu
From the Flow-Induced Vibration(FIV) point of view,throttle orifice can be considered as one of the essential singularities in the system that disturbs the flow and causes structure *** nu
This paper discusses a rough set approach for evaluating solutions of scheduling problems. Algorithms for solving scheduling problems are planners and the scheduling problems are modelled as constraint satisfaction pr...
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This paper discusses a rough set approach for evaluating solutions of scheduling problems. Algorithms for solving scheduling problems are planners and the scheduling problems are modelled as constraint satisfaction problems. Conventional approach for the analysis of algorithms often focuses on the time and representational complexities, and assumes an identical cost on all operations. The proposed rough set approach augments conventional approaches for the analysis of algorithms in two ways: 1) it permits the consideration of different costs arising from different operations; and 2) it allows one to define a new utility for a complexity analysis.
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