Self-Powered Neutron Detectors (SPNDs), which are widely used in nuclear reactors to obtain core neutron flux distribution, are accurate at steady state but responds slowly to changes in neutron flux. Dynamic compensa...
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This paper proposes an algorithm for estimation of point projection parameters, based on pruning on the explicit convex hull of the squared distance function. The explicit expression of the squared distance function i...
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This paper proposes an algorithm for estimation of point projection parameters, based on pruning on the explicit convex hull of the squared distance function. The explicit expression of the squared distance function is deduced. According to the special requirement of point projection, the convex hull of the squared distance function is incrementally constructed. In each step, regions that obviously contain no projection points are eliminated from the base curve or surface, by intersecting the current nearest distance line with the convex hull. When the user-defined tolerances are satisfied, iteration algorithms are used to get the precise projection points. Experimental results show that compared with existing algorithms using clipping circle/sphere or line/plane, this algorithm possesses higher elimination rate and computation speed.
In this paper, an incremental method is proposed for solving under-constrained assembly problems under interactive environment. During an assembling process, a designer adds or removes some constraints, changes the de...
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In China,the development and application goals of Small Modular reactor(SMR) aim at electricity generation area,heat supply area,and seawater desalination area,*** main technical features of the SMR areas follows:inte...
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In China,the development and application goals of Small Modular reactor(SMR) aim at electricity generation area,heat supply area,and seawater desalination area,*** main technical features of the SMR areas follows:integrated pressurized water reactor,reactor coolant pump and reactor pressure vessel connected by short pipe,steam generator sets in reactor pressure vessel,control rod drive mechanism(CRDM),pressure vessel,reactor internals,Once-Through Steam Generator(OTSG),and canned motor pump are all mature *** on the characteristic of the reactor and OTSG,the automatic control design of the SMR is discussed in this paper,and the simulation results are presented to illustrate the control scheme.
During the process of preliminary and conceptual design of hypersonic vehicles, predicting surface friction as well as heat flux is crucial to the design of the thermal protection system (TPS) and optimization of aero...
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ISBN:
(数字)9781624102561
ISBN:
(纸本)9781624102561
During the process of preliminary and conceptual design of hypersonic vehicles, predicting surface friction as well as heat flux is crucial to the design of the thermal protection system (TPS) and optimization of aero-thermodynamics. This paper primarily focuses on two aspects. Firstly, an engineering code has been successfully developed to compute the approximate heating rates of general three-dimensional hypersonic vehicles at angles of attack using unstructured grids for perfect gas. A three-dimensional linear description of surface and flowfield is proposed, based on which an improved axisymmetric analog method is developed, which calculates inviscid surface streamlines and metric coefficients over the body. An implicit surface fitting method is introduced to fit the primary curvatures at stagnation point and a robust marching scheme for calculating heating rates downstream of stagnation region is developed. The proposed engineering approach is verified through a spherically blunted cone and a double ellipsoid, satisfactory agreement between calculation results and wind tunnel experimental results is found. Secondly, a quasi-waverider wing-body model is constructed, the sharp leading-edge of the wing is blunted using circular tips with distinct values of radius, the bluntness effect on the aerodynamic performance is investigated, which would be of vital importance for future work in designing and optimizing the shape of the blunt leading-edge on hypersonic vehicles.
In order to change the poor adaptability and low efficiency of the message router in enterprise service bus, this paper proposed a natural language processing based semantic-level message routing algorithm and design ...
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This paper presents a reasoning method based on the combination of Textual CBR and RBR to deal with the case described by the natural language with the intention of resolving the information retrieval in the flight-te...
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A heavy-load positioner with series-parallel mechanism was put forward according to the heavy-load positioner’s task demand. Two rotational DOFs were realized by the spherical 3-DOF mechanism with a restricted embran...
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Subset Simulation provides an efficient and robust method to estimate the failure probabilities at small probability levels for a single failure mode defined by the system response concerned. However, estimating failu...
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