基于C/S架构的高校座位管理系统

为了实现高校座位的统一智能化管理,并满足不同区域座位的规则独立设定需求,开发了一套基于薄膜压力传感器检测和C/S架构、符合Android MVP设计思维的高校座位管理系统.分析了高校座位管理的需求,基于用户友好和界面友善原则,对系统的功能模块、数据流向和系统架构进行了详细分析和设计.系统包括C/S三层架构,基于Android MVP模式进行分层开发,实现了数据的映射、访问和持久化,并通过用户端APP以及检测终端的设计和调试,实现了座位使用情况的可靠检测和数据的信息化综合管理,提高了座位管理及使用效率,对解决高校座位管理难题,以及校园管理的信息化具有积极意义.     

MVP模式在Android中的应用研究

传统的MVC模式在Android的应用开发中存在诸多不足,主要表现在Android应用开发的关键类Activity会充当Controller和View的合体,既要负责业务逻辑,又要负责显示,造成Activity的职责过多,耦合度高。MVP模式是MVC模式演进而来,引入了Presenter彻底分离Model和View层,在解决Activity臃肿的问题同时,还有助于后期的测试与维护。本文分析MVC对于Android开发的不足,并探索MVP模式在Android开发中的可行性,以及优劣势,最后实现MVP模式在Android开发中的应用。     

改进遗传算法在DOA搜索中的应用

在对短时、低信噪比信号测向时。加权子空间测向算法（WSF）的统计性能优于Music,Esprit等测向算法,且可以对相干信号进行检测。但是因为算法实现涉及到非线性多维搜索。因此运算量很大。本文提出的改进遗传算法,是一种运算速度较快的加权子空间算法的实现算法。该算法将免疫算法引入遗传算法中,并与MVP算法相结合。解决了普通遗传算法（CGA）在DOA搜索中易早熟。后期搜索效率低的问题,拥有快速、全局的搜索能力。计算机仿真证明了该算法的有效性和鲁棒性。     

Azimuthal flux distribution measurements around fuel rods in reduced-moderation LWR lattices

An advanced analysis method named “micro reactor physics approach” was proposed, and the approach is needed for future reactor design considering the neutron behavior in fuel pellets. In order to validate the approach, neutron flux distribution measurements in a fuel pellet should be required. We have measured azimuthal flux distribution of fuel rods in Toshiba Nuclear Critical Assembly (NCA). A foil activation method with metallic foils was used for the measurement. Measured values were analyzed by a continuous energy Monte Carlo code MVP with the JENDL-3.3 library. The measurements are useful for the validation of an advanced fuel design method considering the neutron behavior in fuel pellets.     

Design simplification of a small nuclear reactor for large-diameter neutron transmutation doping silicon using control rods

A design concept for a small nuclear reactor for neutron transmutation doping silicon (NTD-Si) using a Pressurized Water Reactor (PWR) full-length fuel assembly was proposed in our previous work. The excess reactivity was suppressed by a combination of Gd₂O₃ and soluble boron, which results in a flatter flux profile over the core than with control rod insertion; however, the soluble boron system for reactivity control is quite complex and expensive. The removal of this system would make the design much simpler. In the current work, the removal of soluble boron is considered. Criticality, neutron transportation and core burn-up calculations were performed using the MVP/GMVP II code and MVP-BURN code. The calculation results show that the insertion of control rods in five of the nine assemblies is enough to suppress reactivity. The thermal hydraulic analysis showed that heat removal from the core was possible under 1 atm operating pressure. Silicon ingots up to 30 cm in diameter could be irradiated with sufficient uniformity in the irradiation channels.     

Feynman-α and Rossi-α analyses for a subcritical reactor system driven by a pulsed spallation neutron source in Kyoto University Critical Assembly

ABSTRACT

For a subcritical reactor system driven by a periodically pulsed spallation neutron source in Kyoto University Critical Assembly (KUCA), the Feynman-α and the Rossi-α neutron correlation analyses were carried out to determine the prompt-neutron decay constant and quantitatively to confirm a non-Poisson characteristics of the neutron source. In these correlation analyses, a non-negligible contribution of delayed neutrons and a non-Poisson character of the source were considered, and each pulse was assumed to be a delta function. When a neutron counter was placed closely to the reactor core, the prompt-neutron decay constant determined from the present Feynman-α analysis well agreed with that done from a previous analysis for the same subcritical system driven by an inherent neutron source. However, the decay constant determined from the present Rossi-α analysis was in poor agreement with that done from the above previous analysis. This disagreement originated from an inevitable excitation of a higher mode. In the Rossi-α counting probability distribution, the excitation deformed a sharp cusp arising from the delta function to a smooth convex shape. When the data around the convex top were masked for least-squares fitting of the present Rossi-α formula, the disagreement could be successfully resolved. Compared with the previous Feynman-α and Rossi-α analyses under the Poisson inherent source, the non-Poisson spallation source definitely enhanced the respective prompt-neutron correlation amplitudes. The enhancement rate increased with an increase in subcriticality. Moreover, the Degweker’s factor (m ₂-m ₁ ²)/m ₁ ² of 0.067 ± 0.011, which indicated a non-Poisson character of the present spallation source, could be determined from the present correlation analysis and the non-zero value of the factor convinced us that the present source had a different statistical distribution from the Poisson.     

基于MVP模式的SAR图像融合系统设计与实现

为了实现合成孔径雷达(SAR)图像融合算法的测试与应用,设计并实现了一种SAR图像融合系统。构建了基于MVP设计模式的软件框架与基于策略模式的算法库,提高了系统和算法的可扩展性;设计了以树型控件为核心的用户界面(UI),方便了用户的操作。系统实现了SAR图像的滤波、配准、融合、算法性能评估等一系列功能。实际应用结果证明,该系统可以较好地满足SAR图像研究、应用的需求。     

Combined MVP failure criterion for steel cross-sections

This study determines failure criterion for steel member cross-sections, subjected to combined bending moment M, shear force V, and axial force P (MVP). The principle of maximum plastic strain energy is employed to develop the strain-stress relationship for plastic flow, and the expression for the MVP yield surface of the cross-section. A linear distribution of shear strain over the cross-section is assumed. The influence of plastic deformation on bending moment, shear force and axial force, at full yield of the cross-section, is investigated. Results predicted by the derived MVP failure surface, are compared with those obtained by other studies in the literature. The derived MVP yield surface can serve as a basis to identify the failure of steel members, such as during seismic or progressive-failure analysis of building frameworks.     

基于DDoS攻击的检测防御模型的研究

本文介绍了DDoS攻击的原理和传统DDoS检测防御系统的缺点,提出了一种全面、主动、有效的DDoS防御模型,引入了移动Agent技术、Honeypot技术以及MVP技术。本模型的移动Agent技术真正、有效地实现了分布式检测;Honeypot实现主动防御,诱导攻击进入蜜罐主机,保护真实的网络环境;MVP技术则有效地分离了合法流量和恶意流量。该模型部署和操作简单,具有良好的工程应用前景。