Facile Fabrication of Hierarchical Porous N/O Functionalized Carbon Derived from Blighted Grains Towards Electrochemical Capacitors

The hierarchical porous N/O co-functionalized carbon(HPNOC)was scalably prepared by using the lowcost and renewable blighted grains as the raw material coupled with mild KHCO_3 activation for electrochemical capacitors(ECs).The elemental N was in situ doped in the obtained HPNOC without any N-containing additives.Remarkably,the obtained HPNOC was endowed with a large specific surface area(about 2 624m~2·g~(-1)),high pore volume(about 1.35cm~3·g~(-1)),as well as high-content N/O functionalization(about 1.9%(in atom)N and about 10.2%(in atom)O.Furthermore,the as-resulted HPNOC electrode with a high mass loading of 5mg·cm~(-2 )exhibited competitive gravimetric capacitances of about 373.6F·g~(-1 )at 0.5A·g~(-1),and even about 260.4F·g~(-1 )at a high rate of 10A·g~(-1);superior capacitance retention of about 98.8%at 1A·g~(-1 )over 10 000consecutive cycles;and high specific energy of about 9.6W·h·kg~(-1 )at a power of 500W·kg~(-1),when evaluated as a promising electrode in 6mol KOH for advanced electrochemical supercapacitors.More encouragingly,the green synthetic strategy we developed holds a huge promise in generalizing for other biomass-derived carbon materials for versatile energy-related applications.     

中燃速HTPB推进剂燃速公差控制

研究了复合推进剂燃速公差控制的原理和方法，评估了固体组分粒度偏差和组分称量偏差地中燃速丁羟推进剂燃速公差的影响，结果表明，粒度偏差是导致燃速波动的主要原因，称量偏差的影响可忽略不计。     

数字地形数据的二维三次卷积插值

由于数字地形数据库是以网格的形式给出网格点上的地形高度信息，在低空突防轨迹优化过程中，往往需要非网格蹼地形的高度信息和地形曲面的导数，这些都是离散的地形数据库所无法提供的。对二维的地形数据进行插值是解决问题的有效手段。本文提出一种二维离散数据的插值方法－－二维三次卷积插值。该插值函数是地形曲面的三次逼近，具有连续的三阶导数，可以非常好地满足低空突防轨迹优化的需要。仿真结果表明，它具有比双线性插值和     

多孔材料挤压过程数值模拟

本文利用QFORM通用有限元软件对多孔材料挤压过程进行了数值模拟，分析了平均应力与相对密度之间的对应关系，以及初始相对密度对致密速度和挤压力的影响，可以为多孔材料的工艺设计、模具设计和制品性能控制提供理论依据。     

液体推进剂泄漏应急处理

提出液体推进剂泄漏事故的应急处理措施，包括人员疏散、隔离区划分、受伤和中毒人员救治，抢救人员个人安全防护以及其他控制险情的方法。     

氢/空气超音速燃烧自燃规律的实验研究

对平行喷射氢／空气超音速燃烧自燃规律进行了实验研究。主流空气用氢和空气燃烧补氧的方式加热到温度1000～2100K，压力0．8～1．6MPa。发现滞止温度、滞止压力和燃烧室内部构型等都对自燃有影响，特别是滞止温度和内壁构型的影响非常大。研究了四种试验段构型的自燃规律，找到了它们的自燃极限条件。对于光滑内壁构型，当温度接近自燃极限时，发现了有兴趣的现象并作了讨论。     

在火箭发动机燃烧室中气相湍流流动的理论计算

本文用单流体湍流模型对液体火箭发动机突扩燃烧室中冷态气相流动的速度场和湍流强度分布进行了数值计算并与实验数据进行了对比和分析.     

Detection performance in K-distributed and correlatedRayleigh clutters

Performance prediction for a detection system employing noncoherent integration is carried out for a chi-square family of fluctuating targets in K-distributed clutter plus noise. The detection performance for Swerling 11 targets in the K-distributed clutter plus noise is compared with that in exponentially correlated Rayleigh clutter. The results show that the performance prediction based on N pulses integrated in clutter plus noise using the K-distributed clutter model may be approximately equivalent to that using the exponentially correlated Rayleigh-distributed clutter model     

Direct Evaluation of Radar Detection Probabilities

A simple and effective procedure for evaluating detectionperformances in radar and sonar detection problems is derived forboth fixed-threshold and adaptive-threshold detection. Using theprocedure, the cumulative probabilities of the test statistic can bedirectly evaluated from the moment generating functions bycalculating residues. The exact formulae for computing the detectionperformances for the chi-square family of fluctuating targets withan integer fluctuation parameter are given in a finite sum formwithout any special functions for both fixed threshold and cellaverageconstant false-alarm rate detection by using the methoddeveloped here.     

翼型动失速和非定常载荷的综合翼型数据方法

本文给出受迫谐振翼型的动失速工程估算方法。本方法基于凤洞试验，综合分析翼型动、稳态特性之间的差别与动、稳态条件之间的关系，建立一套估算动、稳态特性之间差别的经验公式，修正稳态特性，得到相应的动态特性。用本方法计算了三种翼型不同动态条件（包括深失速和后掠）的动失速特性，并与测量和文献结果进行了比较，结果符合得相当好。