发射

The effects of the content of Hexogen and Nitroguanidine on the combustion behavior of nitramine propel-lants under low pressure were studied in the closed bomb. The combustion data of six kind of nitramine propellants with different ratio of RDX/NGu were obtained from 20MPa to 60MPa by the closed bomb test.

为了研究RDX和硝基胍对硝胺发射药在低压下燃烧性能的影响，对六种RDX/NGu配比不同的硝胺发射药进行低压密闭爆发器静态燃烧实验，获得了在20~60MPa压力范围内硝胺发射药的燃烧试验数据。

Results reveal that the spatial correlation properties of MIMO channel are dependent on the PAS, the antenna pattern and the geometric configuration of the array. When the PASs at the base station and the mobile station are independent, the spatial correlation matrix of the MIMO channel is the Kronecker product of the spatial correlation matrix at the BS and the MS. The temporal correlation properties of the MIMO channel are determined by the PAS at the MS, antenna pattern and the traveling speed of the MS. Based on the analysis of the physical essence, the temporal correlation properties are equivalent to the spatial correlation properties at the MS. The joint spatio-temporal correlation properties at the BS and the MS are quite different. When the PASs at the BS and the MS are independent, the spatial correlation at the BS is independent on the temporal correlation, but this is not true for the spatial correlation at the MS.

分析与计算的结果表明，MIMO信道的空间相关特性由角度谱、阵元的方向图、阵元间距以及阵列几何结构决定，并且当发射端与接收端的空间统计特性相互独立时，MIMO信道的空间相关矩阵可以表示为发射阵列空间相关矩阵与接收阵列空间相关矩阵的Kronecker乘积：信道的时间相关仅与MS端的角度谱、阵元方向图以及MS的运动速度有关，通过对信道时间相关的物理本质的研究，说明了时间相关与MS端空间相关的等价性；MIMO信道的空-时联合相关特性在BS端和MS端具有不同的特点，当发射端与接收端的空间统计特性相互独立时，BS端的空间相关与时间相关是独立的，而由于信道的时间相关与MS端的空间相关具有相同的物理本质，MS端的空间相关与时间相关不是独立的。

Polarization curve and constant potential polarization experiments showed that AE events rate is linear to polarization current density.

极化曲线和不同恒电位下极化的声发射测量显示，声发射事件率与极化电流密度近似成线性关系，说明无论是阳极溶解还是铝合金的阴极腐蚀都是重要的声发射源。

The acoustic emission inspection and location principle of large vertical normal pressure storage tank bottom on-line inspection was studied.

基于大型常压立式金属储罐底板在线声发射检测及定位的原理，针对声发射检测过程中因声源性质不明确导致的罐底完整性评价结果不准确的问题，采用小波分析方法对罐底声发射信号进行了分解。

Considering the non-stationary specialties of AE signals, the diamond blunt feature extraction method based on bispectrum was studied. Furthermore, the diamond blunt feature extraction method based on main diagonal slice of normalized bispectrum magnitude of AE signal was proposed.

深入研究了砂轮修整过程中声发射信号的产生机理及其时频特征，提出了基于声发射信号的小波包频带能量分解的金刚石笔钝化状态特征提取方法；将高阶累积量和双谱理论引入到金刚石笔钝化状态的特征提取中，提出了基于声发射信号归一化双谱模对角切片的特征提取方法。

This material can make some man-portable launcher reusable when it is formed on the inner surface of the launcher.

这种涂料成型于某型号便携式火箭发射器内表面后，与发射器粘接优良，可使发射器实现多次重复使用。

The results show that the penetrability of powder loads can be improved when suitably reducing bulk density and grain size of gun propellant, increasing nitrogen content of NC and choosing oblate spheroid explosive respectively under the constant test con

结果表明，在其它试验条件不变的条件下，适当降低发射药堆积密度、适当提高发射药中硝化棉含氮量、选用恒面燃烧的扁型药、降低发射药粒度均有利于提高射钉的穿透能力。

Here, we propose two kinds of OTD schemes: OTD-S and OTD-IM for MC-CDMA system, in which multiple orthogonal spread codes are used to build multiple orthogonal space transmission channels.

正交发射分集是CDMA系统一种简单有效的发射分集方法，本文提出了MC-CDMA系统的正交发射分集方法和对应的2种结构：OTD-S和OTD-IM。

The infrared emission phototube is setted on the adjustable bracket front-end of the cover, so we can adjust the infrared emission phototube to aim at the infrared receiving phototube expediently.

红外发射管安装在发射器金属罩前端的可调支架上，可方便地将红外发射管对准接收器上的红外接收管。

Projectors and monitoring hydrophones are placed n a chamber along its length. The projectors are driven By the required drives that are calculated aceording to a measured transfer matrix, and amplitude, frequency and incident of the predicted plane wave. Then the acoustic pressure field distribution which is equivalent to the predicted plane wave of any incidence is set up in the chamber. A prototype calilbration system has been developed.

在管中沿管轴方向布置一系列发射换能器和监测水听器，根据实测得到的传递函数矩阵和所要模拟的平而波频率、幅度和入射角计算得到一组发射换能器驱动信号的幅度和相位，然后以此信号激励每个发射换能器，就能在管中形成一个等同于任意角度入射的自由场平面波声场的声压分布。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。