以过氧化苯甲酰为氧化剂合成聚苯胺纳米纤维

以过氧化苯甲酰（BPO）为氧化剂，在油／水两相体系中制备了聚苯胺纳米纤维。研究了温度、酸的种类、氧化剂浓度及酸度等聚合条件对聚苯胺形貌的影响。研究结果表明当BPO浓度为0．8mmol／L时，在2．0mol／L的盐酸介质中所合成的聚苯胺纳米纤维较好，温度对形貌没有明显的影响。当盐酸浓度〉2．0mol／L或采用硫酸、有机酸做酸性介质时无聚苯胺纳米纤维生成。提出了纳米纤维生长机理。     

Factors affecting biological denitrifying dephosphatation in anaerobic/anoxic/aerobic sequencing batch reactor

This study was conducted to verify and discuss the denitrifying dephosphatation under different levels of nitrate concentration and retention time of anoxic/aerobic process in a Sequencing Batch Reactor (SBR). The results of tests demonstrated that there were two kinds of phosphorus-accumulating organisms (PAOs) in the biological excess phosphorus removal (BEPR) system. One was non-DNPAOs that could only use oxygen as terminal electron acceptors, the other was denitrifying PAOs (DNPAOs) that could use both nitrate and oxygen as terminal electron acceptors. Phosphorus uptake efficiency could be attained under anoxic period ranging from 28.7%-96.7% in an anaerobic/anoxic/aerobic system. Experimental results showed that nitrate concentration and retention time of anoxic/aerobic process were the key factors affecting the course of denitrifying dephosphatation.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.     

基于智能天线的TD-SCDMA系统LCS平台研究

从无线定位业务的应用前景出发,结合TD-SCDMA系统采用智能天线的特点,提出了一种方位测量定位法(AOA)和圆周定位法(TOA)的混合定位法,并给出了基于该定位法的无线定位平台的体系结构,而且还对该系统的基本运作机制作了简要的阐述。     

温差发电实验台温度控制系统设计

温差发电技术研究的基础是搭建一套满足需求的测试平台,其中最为关键的是温度控制系统。为此基于单片机建立了温度控制系统,主要对硬件电路,特别是传感器处理电路、加热电路、PID控制系统进行了设计。实验数据表明,该系统能够满足实验要求,温差发电片的开路电压与其两端的温差基本呈线性关系。     

胶体泥浆防灭火技术在杨村煤矿的应用

介绍了胶体泥浆防灭火技术在扑灭大范围冒空区火灾和抑制上分层终采线漏风的应用情况，现场实践证明，该技术工艺简单，简便易行，投入少，见效快，治理区域不易复燃，在自然发火矿井中具有推广价值。     

基于尺寸补偿的金刚石成型刀具改进的试验研究

根据金刚石成型刀具异型区域各截面磨损程度的不同,建立了刀具磨损速率数学模型,并以此为依据提出了刀具改进方案,即通过对金刚石成型刀具结块厚度的尺寸补偿,实现刀具异型区域结块的均匀磨损,提高其切削性能和工艺性能,延长刀具的使用寿命。     

链式通信链路技术性能研究

本文对美军新一代战机上装备的飞机间数据链通信体制进行分析，对其采用的链式通信的基本结构进行了研究，对其它链式通信结构进行设想，并与现在通信中经常采用的时分多址通信体制进行了比较。     

粉料低压气体输送自控系统

本文介绍了一种以可编程序控制器为核心的粉料低压气体输送自动控制系统,并对系统的硬件结构、软件构成、控制方式及特点作了介绍。