能源合理利用与人类住区的可持续发展

本文针对近期石油涨价以及全社会都在提倡节约的大气候,从现有能源的利用和新能源的开发两大方面谈能源合理利用与人类住区的可持续发展过程中应注意的问题,并提出相应的看法和建议。     

Thin structure of temporal profiles of solar flares January 15, 17 and 20, 2005 by data of AVS-F apparatus onboard CORONAS-F satellite

The count rate temporal profiles and energy spectra of the solar flares January 15, 17, 20 2005 in hard X-ray and gamma energy bands by data of AVS-F apparatus onboard CORONAS-F satellite are discussed. The energy spectra of these solar flares contain positron line and neutron capture line. Solar flares of January 17 and 20 spectra also contain some nuclear lines. Thin structure with characteristic timescales of 33–92 s is presented on flares temporal profiles in energy bands corresponding to the observed spectral features, which are confirmed by periodogram analysis (confidence level is 99%).     

某公司供热系统节能减排技改方案浅析

为提高某公司能源利用水平，减少污染物排放，针对该公司现正使用燃煤锅炉蒸汽加热方式所造成的高耗能、高污染、低效益问题，提出应用燃气替代燃煤并辅以部分电加热的技改方案，达到实现节能减排提高效益之目的。     

基于eQUEST的机场航站楼能耗分析方法研究

首次尝试将eQUEST用于机场航站楼能耗分析,应用表明具有计算速度快、输出能耗数据丰富、与实际能耗接近和便于进行各种能耗分析等优点.借助eQUEST还可对航站楼的建筑围护结构、空调系统和照明方案等进行设计、运行的节能优化.     

Inter-satellite calibration of FengYun 3 medium energy electron fluxes with POES electron measurements

We perform an L-shell dependent inter-satellite calibration of FengYun 3 medium energy electron measurements with POES measurements based on rough orbital conjunctions within 5?min?×?0.1?L?×?0.5 MLT. By comparing electron flux data between the U.S. Polar Orbiting Environmental Satellites (POES) and Chinese sun-synchronous satellites including FY-3B and FY-3C for a whole year of 2014, we attempt to remove less reliable data and evaluate systematic uncertainties associated with the FY-3B and FY-3C datasets, expecting to quantify the inter-satellite calibration factors for the 150–350?keV energy channel at L?=?2–7. Compared to the POES data, the FY-3B and FY-3C data generally exhibit a similar trend of electron flux variations but more or less underestimate them within a factor of 5 for the medium electron energy 150–350?keV channel. Good consistency in the flux conjunctions after the inter-calibration procedures gives us certain confidence to generalize our method to calibrate electron flux measurements from various satellite instruments.     

基于变参数广义结构的距离扩展目标检测方法

针对特定杂波背景下的最优或次优检测器结构难以适应过渡杂波环境的问题,首先,给出基于变参数广义结构的距离扩展目标检测器,通过调整参数来适应杂波特性。其次,确定检测器最佳参数的经验公式,经验公式符合数值结果。最后,利用仿真试验分析检测器的检测性能。仿真结果表明,在介于高斯和复合高斯杂波之间的过渡环境中,提出的检测器比现有检测器具有更加优异的目标检测性能,对杂波非高斯程度时空渐变性具有较强的适应能力。     

Multi–physical-field characteristics modeling and structure optimization for kW-level ultra-high-speed PM motors with integrated support system

In the aerospace industry, the low-mass ultra-high-speed flywheel system play a critical role. In this paper, a kW-level Ultra-High Speed Permanent Magnet Synchronous Motor (UHSPMSM) as the core component of flywheel system is proposed and analyzed with consideration of multiple physical fields, including electromagnetic characteristics, mechanical strength and rotor dynamics. The integrated support structure is put forward to improve rotation accuracy and operation stability of the UHSPMSM. Further, influence of the integrated support structure on critical speed is explored, and the key parameters such as support position and support stiffness are designed. Moreover, the rotor strength is analyzed by analytical model developed of rotor stress that can deal with multiple boundary types. Material and thickness of the sleeve are optimized, and range of interference value is accurately limited based on four extreme operating conditions. The 3-D Finite Element Model (FEM) is used to validate the strength characteristics and stress distribution of rotor. A 1.5 kW-150000 r/min UHSPMSM with integrated support system is manufactured and tested. The feasibility of UHSPMSM proposed and the accuracy of analysis method are verified through electromagnetic, temperature rise and vibration characteristics test. The machine prototype realizes the load operation at rated speed and the multi-physical-field characteristics achieve the design specification.     

Helicity evolution during the life cycle of tropical cyclones formed over the north Indian Ocean

Tropical cyclones (TCs) are violent multiscale convections occurring in the atmosphere. The destructive impact of the TCs is commensurate to the helicity associated with their evolution. The evolution of helicity of three TCs viz. Fani, Luban, and Ockhi formed over the north Indian ocean have been analyzed in this study. The analysis of kinetic energy density of primary (EP), secondary (ES) circulation and total helicity has shown that TCs showed helical features when the secondary overturning circulation knotted with primary tangential circulation in a moist convective situation. This condition can be considered a starting of the self-sustained helical feedback process. At this time, the core region became a rotation-dominated region that suppressed strain-dominated surroundings. The Okubo-Weiss parameter demonstrates the similar qualitative behavior of deep convection as total helicity. The local maximas in helicity time series are related with the changes in tropical cyclones' stages (intensification/dissipation). Therefore, consideration of helicity analysis is essential to analyze the TC intensification and dissipation.     

三维编织复合材料圆管轴向压缩性能及破坏机理

通过真空辅助树脂传递模塑成型技术,制备了三维多层缠绕编织、三维五向面芯编织和三维七向编织3种不同三维编织复合材料圆管。系统分析了三维编织复合材料圆管的纱线轨迹,分别开展了准静态轴向压缩试验,研究了不同编织工艺对三维编织复合材料圆管的压缩承载、破坏模式及吸能性能的影响。结果表明：不同编织结构圆管的轴向承载能力和破坏机制存在显著差异。三维多层缠绕编织圆管的环向纱体积含量较高,能有效承担轴向载荷,其轴向承载能力明显高于其余两类编织圆管。但由于纤维间载荷传递性能较弱,易发生脆性破坏,导致吸能效果最差。而三维五向面芯编织和三维七向编织圆管具有紧密交织的纱线结构,径向编织纱能有效限制剪切裂纹扩展,从而引发渐进稳定的开花式破坏,此类破坏具有较好的吸能特性。三维五向面芯编织圆管纤维断裂更加充分,吸能效果最为优异。     

Suppressing nonlinear aeroelastic response of laminated composite panels in supersonic airflows using a nonlinear energy sink

This paper proposes using a Nonlinear Energy Sink (NES) to suppress the nonlinear aeroelastic response of laminated composite panels in supersonic airflows. Relevant aeroelastic equations are established using Hamilton’s principle and a finite element approach, drawing upon Von Karman’s large deflection theory and first order piston theory. The idea of the NES suppression region is proposed and the effects of NES parameters on the NES suppression region are studied in detail. The results show that the nonlinear aeroelastic responses of the panel can be completely suppressed by the Transient Resonance Capture (TRC); the appropriate NES parameter values can increase the critical dynamic pressure for flutter and suppress the nonlinear aeroelastic response effectively. Increasing the mass ratio of the NES can improve the NES suppression region; the nonlinear stiffness coefficient and damping of the NES within a specific range can suppress the nonlinear aeroelastic response. The most effective installation position for a NES is in a specific region behind the center-line of the panel in the direction of the airflow.