基于DIS的网络化防空作战系统作战效能评估研究

网络化防空是未来防空作战发展的必然趋势,对于网络化防空作战系统的作战效能评估是一个值得研究的问题。在军事仿真领域,分布交互仿真越来越多地应用于作战系统效能的评估与分析。文章在分析分布交互仿真及其在作战效能评估方面的作用的基础上,说明了基于分布交互仿真的网络化防空作战系统作战效能评估的一般步骤,介绍了效能评估仿真系统的体系结构与实现方法,对研究基于攻防对抗仿真的网络化防空作战效能评估具有一定的指导意义。     

城乡规划效能监察中的申诉机制构建探讨

城乡规划的效能直接影响城市社会经济的有序发展.如何提升城乡规划的效能,是一个普遍关注的课题.针对我国目前城乡规划效能存在缺乏有效的监察手段和申诉机制的问题,借鉴西方行政监察和英国规划督察的经验,提出效能监察申诉的受理原则和申诉机制的建立构想.城乡规划效能申诉机制的建立,是民主监督的重要体现,能够督促城乡规划部门更好地履行法定职责,更有效地维护公众的合法权益,提高城乡规划的效能.     

50MeV／u^20Na＋^208Pb→p＋^19Ne＋^208Pb反应的探测效率模拟

用半经典模型考虑＾２０Ｎａ＋２０８Ｐｂ→ｐ＋＾１９Ｎｅ＋＾２０８Ｐｂ的Ｃｏｕｌｏｍｂ解离过程,用ＭｏｎｔｅＣａｒｌｏ方法计算前角放置的望远镜阵列对Ｃｏｌｕｏｍｂ解离碎片的探测效率,讨论了天体环境ｐ＋＾１９Ｎｅ→＾２０Ｎａ俘获反应道的低能级共振截面测量的可行性。     

Suppression of efficiency roll-off in TADF-OLEDs using Ag-island nanostructures with localized surface plasmon resonance effect

Organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) have emerged as promising alternatives to phosphorescent OLEDs for harvesting both singlet and triplet excitons. However, the development of TADF-OLEDs meets a thorny problem of serious efficiency roll-off at high luminance. Here, we demonstrate an approach to suppress the efficiency roll-off characteristics in TADF-OLEDs by localized surface plasmon resonance (LSPR) effect of easy-fabricated Ag-island nanostructures. Compared with the common TADF-OLEDs at a high current density of 100 mA cm⁻², the efficiency roll-off ratio of the TADF-OLEDs with Ag-island nanostructures decreases from 49.75% to 35.76% significantly, and the maximum current efficiency is increased by 10.5%. The performance enhancement is mainly attributed to the coupling between excitons and localized surface plasmons (LSPs), which could alter the excited state kinetic characteristics of TADF molecules.     

基于循证设计理念的医院急诊医学科服务效率研究——以北京朝阳医院为例

循证设计是西方医疗建筑中逐渐兴起的、以实证研究为基础的设计理论和方法,基于循证设计的指导思想将很有可能成为未来医院设计的主体。本文运用循证设计的基本原理和方法,对北京朝阳医院急诊科调研结果进行分析,总结其设计优点与不足,提出影响医院急诊科使用效率的几个方面的内容,期望为医院急诊科设计者提供一些参考。     

Closed loop torque SVM-DTC based on robust super twisting speed controller for induction motor drive with efficiency optimization

This paper presents a space vector modulation (SVM) based Direct Torque Control strategy (DTC) for induction motor (IM) in order to overcome the drawbacks of the classical DTC. SVM can reduce the high torque and flux ripples by preserving a fixed switching frequency. This technique is known by the closed loop torque SVM-DTC. Moreover, the control scheme performance is improved by inserting a second order sliding mode super twisting controller in the outer loop for speed regulation. This nonlinear technique ensures a good dynamic and high robustness against external disturbance. Furthermore, the IM energy optimization is treated in the second objective of this paper. A proposed model based loss minimization strategy is presented for efficiency optimization. This strategy chooses an optimal flux magnitude for each applied load torque. The proposed optimized SVM-DTC algorithm will be investigated by simulation and real time implementation using Matlab/Simulink with real time interface based on dSpace 1104 signal card.     

基于物联网的锅炉能效测试集成系统的研发

基研发了一种基于物联网的锅炉能效测试集成系统。该系统以物联网为网络技术架构、以Zigbee为无线通讯技术，高度集成化测试设备，完全实现了现场测试数据自动采集、无线传输、记录和处理等功能，可现场出具测试报告等功能，可极大地减少测试人员的劳动强度，提高工业锅炉能效测试的科学性和可信度。     

Hydrogen production methods efficiency coupled to an advanced high-temperature accelerator driven system

Hydrogen, rather than oil, must be produced in volumes not provided by the currently employed methods. In this work, two high-temperature hydrogen production methods coupled with an advanced nuclear system are presented. A new design of a pebble-bed accelerator nuclear-driven system called TADSEA (Transmutation Advanced Device for Sustainable Energy Applications) was chosen because of the advantages in transmutation and safety. A detailed flowsheet of the high-temperature electrolysis process coupled to TADSEA through a Brayton gas cycle was developed using chemical process simulation software: Aspen HYSYS^®. It is obtained 0.1627 kg/s of hydrogen with the model with optimized operating conditions, resulting in an overall process efficiency of 34.51%, a value in the range of results reported by other authors. A conceptual design of a plant using the iodine-sulfur thermochemical water splitting cycle was carried out producing 5.66e-2 kg/s and electric energy in cogeneration. The overall efficiency was calculated performing an energy balance resulting in 22.56%. A brief hydrogen production cost estimation was performed for both methods obtaining 5.96$/kg for the sulfur-iodine (SI) and 4.8 $/kg for the high-temperature electrolysis (HTE) process.     

Performance assessment of solar-powered high pressure proton exchange membrane electrolyzer: A case study for Erzincan

In this study, a performance assessment of a solar-powered high-pressure proton exchange membrane (PEM) electrolyzer for hydrogen production is conducted. The feasibility analysis of photovoltaic systems equipped with a high pressure PEM electrolyzer is presented for a university campus-scale community in Erzincan- Turkey. Variable solar irradiance data sets are utilized to assess the performance of the proposed system. A parametric study is conducted in order to evaluate the influence of some design parameters as well as operating conditions on the efficiency of the system. Efficiency of the overall system in the case of relevant inverter sizing is in the range of 11–12%. An ascent of the number of stacks leads to an increase in production rate which is almost linear by photovoltaic (PV) array size. The results shows that in order to have a higher efficiency, the inverter size should be higher than 0.75% of maximum excess power. The proposed system investigated in this study shows great promise of opening up opportunity to develop the high pressure PEM electrolyzer.     

Efficiency analysis of information technology and online social networks management: An integrated DEA-model assessment

This paper analyses the relationship between productive efficiency and online-social-networks (OSN) in Spanish telecommunications firms. A data-envelopment-analysis (DEA) is used and several indicators of business “social Media” activities are incorporated. A super-efficiency analysis and bootstrapping techniques are performed to increase the model's robustness and accuracy. Then, a logistic regression model is applied to characterise factors and drivers of good performance in OSN. Results reveal the company's ability to absorb and utilise OSNs as a key factor in improving the productive efficiency. This paper presents a model for assessing the strategic performance of the presence and activity in OSN.