烧结原料场大面积扬尘的控制措施

针对烧结原料场大面积扬尘的情况。提出了综合治理措施。着重对适合于烧结用粉状物料的扬尘抑制剂进行了研究。     

基于LabVIEW的航空火警控制盒测试设备

航空火警控制盒测试设备是一套主要用于火警控制盒、火警探测器、主告警控制盒、告警控制盒等的校验、故障诊断的设备。介绍了一种基于LabVIEW的航空火警控制盒测试设备的方法,利用PC机中的LabVIEW图形化编程软件采用随机数读取并且显示,再对信号进行分析,对超限信号起到报警功能。     

Inhibitory Effect of Monoterpenes on Response of Pityogenes bidentatus to Aggregation Pheromone Released by Piezoelectric Sprayer for Precision Release of Semiochemicals

A piezoelectric sprayer for dispensing semiochemicals was developed and used for a field test of bark beetle semiochemicals. The sprayer consists of a geared pump that pushes a syringe slowly to dispense semiochemicals in solvents through a microtube to a glass micropipet fixed to a piezoelectric high-frequency vibrator. The frequency is adjusted via a function generator to about 120 kHz until the harmonic properties of the glass micropipet, drawn by an electrophysiological pipet puller, cause vibrations that atomize the solvent from the micropipet tip. The sprayer, syringe, pump, function generator, and power supply were hung on one arm of a rotating trap pair (traps 6 m apart) that was slowly rotated at 2 revolutions per hour (rph) to even out the position effects on trap catches. The aggregation pheromone components of Pityogenes bidentatus, grandisol and cis-verbenol, were released by standard tube dispensers in one trap and compared to the release of similar amounts by the sprayer in the other trap. No significant differences in catch were observed. No effect of the solvent hexane on aggregation could be observed. The trap pair also caught approximately equal numbers of bark beetles when the baits were identical. The release of (+)and (–)--pinene, (+)-3-carene, and terpinolene, monoterpenes of host Scotch pine, Pinus sylvestris, at increasing rates from 0.01 to 10 log-equivalents in decadic steps (each at 0.1–100 g/min) resulted in decreasing responses to aggregation pheromone (only 9% at highest rate). Inhibition by the individual monoterpenes tested at the 100 g/min rate was significant for (+)and (–)--pinene and terpinolene (12, 13, and 15% of control, respectively). The inhibition by the host Scotch pine monoterpenes may allow P. bidentatus to avoid resistant trees that release large amounts of toxic monoterpenes in their resin and instead colonize dying and diseased limbs or slash, the usual host substrate. The piezoelectric sprayer should prove generally useful to dispense precise amounts of semiochemicals in field and laboratory experiments.     

Orientation Disruption of Ctenopseustis herana

Orientation disruption of C. herana was tested using pheromone traps baited with synthetic lures in small plot trials in apple orchards, using polyethylene rope dispensers (100/0.1-ha plot). Dispensers released either (a) 100% (Z)-5-tetradecenyl acetate (pheromone of C. herana), (b) a blend of 25% (Z)-5-tetradecenyl acetate and 75% (Z)-8-tetradecenyl acetate (multiple species disruptant blend), or (c) a blend of 50% (Z)-8-tetradecenyl acetate and 50% saturated tetradecenyl acetate (pheromone of Planotortrix octo). Blends (a) and (b) were effective at reducing trap catch by up to 100%, but disruption was not achieved with (c). Experiments with lures containing pheromone compared to pheromone plus (Z)-8-tetradecenyl acetate showed reduced attraction to (Z)-5-tetradecenyl acetate with the addition of (Z)-8 (1:3). These results indicate reduced attraction to lures but not disruption of orientation behavior from background release of this compound and in contrast to the reduced attraction and disruptive effect of the C. herana pheromone (a) on P. octo. Disruption of C. herana using the multiple species disruptant blend (b) deserves further investigation.     

基于双迭代与二阶锥规划的机载雷达稳健降维STAP方法

针对机载雷达空时自适应处理（STAP）中期望目标导向矢量的失配问题,提出一种基于双迭代与二阶锥规划的稳健降维STAP方法。该方法首先将权矢量分解为空域与时域两个低维权矢量的Kronecker积,然后分别限定实际空域、时域导向矢量与假定导向矢量之间的误差范数边界,并通过对各自最差性能进行优化,转化为相应的SOCP形式,进而利用双迭代算法实现了对两个低维权矢量的分别求解,最终合成全维STAP权矢量。该方法在保证稳健STAP性能的同时,通过双迭代降维处理,能够有效降低训练样本数需求与运算复杂度,因此更具有实际应用价值。仿真结果验证了算法的有效性。     

某机载雷达发射校正系统的EMC设计

因受载机平台内电子设备电磁干扰的影响,某机载雷达发射校正时存在通道相位漂移的现象,表现为同一通道相位多次测量偏差超过正常幅度值.在阐述发射校正系统工作原理的基础上,深入分析干扰的来源和机理,提出了综合运用屏蔽、接地、滤波等措施解决电磁兼容问题的具体方法,实现了雷达发射校正系统的可靠工作,为该类工程设计提供了参考.     

Surface destructive mechanism on high-temperature ablation, supersonic-erosion, dreg-adherence and corrosion

The exhaust and flame from a supersonic airborne missile high-energy smoke-born engine (SAMHSE) may lead to high-temperature ablation, supersonic-erosion, dreg-adherence (HTASED) and corrosion on the launcher slide track, causing serious problems to the operation and decreasing the lifetime of the launcher. Therefore, it is imperative to study the destructive mechanism so as to guarantee the smooth operation and increase the lifetime of military equipments. Accordingly, HTASED and corrosion were systematically observed and analyzed with the emphasis placed on the mechanism investigations making use of a series evaluation tests, typical missile engine simulation tests, national military standard methods, scanning electron microscopy and electrochemical corrosion tests. It is found that the thermal impact of high-temperature flame and supersonic erosion of corrosive melting particle jet of the SAMHSE lead to surface defects of micro-cracks, denudation and corrosive residue. Some defects reach to metal base becoming to "corrosive channels". Repetitive HTASED may cause ablation-adhesion fatigue stress, which enhances the surface corrosion and destruction. HTASED and corrosion are related to the type of a SAMHSE fuel and experience of the launcher. Surface destruction is related to synergistic effects of the HTASED. The ablated and failed Al or steel surface is liable to electrochemical corrosion characterized by pitting in humid and salt-spray environment.     

机载雷达级联降维空时自适应杂波抑制方法

提出一种机载雷达杂波抑制的级联降维空时自适应算法,即,先对全空时两维接收数据进行预滤波处理,将杂波局域化,降低杂波自由度;然后对预处理输出的信号的相关矩阵进行子阵划分,求解低维权向量,进一步降低运算量和采样要求。理论分析和实验仿真结果表明,所提算法具有良好的收敛性能和杂波抑制能力,并且对于阵元随机幅相误差和杂波起伏具有很好的容差能力。基于实测数据的实验验证了算法的有效性和稳健性。     

机载控制视觉目标定位系统的设计与实现

机载控制视觉目标定位系统广泛应用于航空控制领域,对其进行设计和实现具有重要应用意义;针对机载控制视觉目标定位的特征,设计并实现了机载控制视觉目标定位系统,分析了系统的总体结构,包括视觉模块、飞控模块、导航模块以及无线传输模块,给出了系统主控箱、CAPA800主控制器、PCI04总线标准的主板、视觉传感器、PM1270T144C5N芯片的硬件结构,给出了系统的软件流程和视觉处理模块的流程,分析了基于CCS3.3代码开发调试平台的系统代码设计,最终实现机载控制视觉目标定位系统的设计与实现;实验结果说明,所设计系统获取的机载控制视觉目标清晰、有效,并且具有较高的目标定位效率和精度.     

测量机器人在三角网测量中的应用分析

简述了TCA2003测量机器人全圆观测法机载软件的组成与特点。以陈村水电站大坝的三角网观测为应用实例,基于对其测量平差成果的精度及测量时间分析,将其与传统人工观测的效率进行比较,证明了测量机器人测量的优越性。指出了一些仪器使用及机载软件存在的问题,对自动目标识别（ATR）仪器机载软件的应用开发具有指导作用。