棉型服装面料服用性能测试分析

通过使用悬垂仪、耐磨仪、撕裂仪、透气仪以及折皱弹性仪对棉及棉型织物的各主要服用性能指标进行测试，采用灰色关联的方法分析织物的悬垂性能、透气性能、折皱弹性性能、撕裂性能、耐磨性能等服用性能与主要影响因素(织物的规格，结构)之间的关联程度，分析最终对纺织品面料外观、舒适性、耐用性和保养性的影响。     

A Method of Determining the Axes of a Three-Component Magnetometer Sensor with Respect to the Axes of the Navigation System of a Ferromagnetic Mobile Object

A method of determining the orientation of the axes of a three-component magnetometer sensor with respect to the axes of the navigation system of a ferromagnetic mobile object is considered, which eliminates the effect of the magnetization of the object on the determination of the angular position of the axes of the sensor with respect to the axes of the navigation system.     

声表面波谐振器无源无线传感虚拟仪器系统

分析了在通用硬件平台上结合软件设计的声表面波谐振器无源无线传感虚拟仪器系统。该系统通过设计虚拟仪器实现部分硬件功能,控制闭环系统实现自动检测,并采用数字信号处理方法提高检测系统的精度,从而避免了通常的复杂硬件系统,降低硬件成本,并使检测更灵活。本文介绍了设计原理和系统构成,并对系统的误差进行了分析。实验表明:该仪器系统能够达到5m的无线检测距离。     

Analysis of NEA C5MOX benchmark with computer code “cohint” based on interface current approach

Interface current approach to solution of neutron transport equation has been earlier used for LWR lattice problems. The analysis of the C5MOX benchmark is a opportunity to test its applicability to heterogeneous reactor problem. Computer code COHINT, which incorporates a routine for solution of neutron transport equation in X-Y geometry by interface current approach was used for this analysis by representing the fuel rod as a square one. Region interface angular fluxes are represented by a four-term expansion. It is found that the average pin power error is about 2.28 % (peak pin error 4.1 %) relative to reference calculations. Further improvement is possible by introduction of the capability to represent circular rods with in a square cell in COHINT.     

Direct current bias applied to hot flame diamond deposition produces smooth low friction coatings

As-deposited diamond coatings generally have a high surface roughness which results in a high friction coefficient and extensive wear of the counter material in sliding contact. Therefore several methods for smoothening diamond coatings have been proposed, such as laser polishing, molten metal etching, thermochemical polishing and mechanical polishing. All these methods have some disadvantage e.g. long processing time or high processing temperature. Furthermore, they are all post-deposition treatments i.e. the manufacture of these coatings requires at least two processing steps, deposition and smoothening. With the present method which combines d.c. bias with hot flame diamond deposition, a smooth diamond surface is produced during the actual growth of the film. No post-deposition treatment is necessary. The surface roughness is not dependent on the coating thickness which means that thick coatings with smooth surface can be produced. In fact, the method has a smoothening effect, i.e. rough surfaces can be made smooth. The method is comparable to conventional hot flame deposition of diamond as to growth rate and cost of producing the coatings. The coatings have a nano-crystalline structure and a surface roughness of Ra = 25 nm, and result in a friction coefficient of 0.1 or less in dry sliding and about 0.05 in water-lubricated sliding against cemented carbide. Their wear resistance is virtually the same as that of conventional diamond films.     

热电式微风仪非线性信号处理方法研究及其电路实现

热电式风速传感器感应输出的电信号与实际风速之间存在复杂的非线性函数关系。本文通过对目前几种流行的测量信号性化处理方法的讨论，深入地分析了导致目前多数热电式数字微风仪产品其实际测量指标不理想的原因。并根据对热电式风速传感器探测机理的研究，推荐一种易于实现的探测信号的非线性/线性转换的电路模型。     

图像传感器数据采集与显示系统设计研究

随着智能小区门禁系统视频监控与远程控制功能的发展,高清图像传感器应用日益普及,为安全监控提供高质量图像。研究以现场可编程门阵列(FPGA)为核心的图像采集、显示与控制系统,作为门禁系统的核心电路,对FPGA配置OV3640控制寄存器方法进行了设计,并使用行场与像素脉冲来控制同步采集传感器输出的视频数据,图像实时显示在液晶显示屏上。调试结果表明:传感器配置方法及实时采集算法可行,能够满足高清图像拍摄与显示功能。更多还原     

应用蓝牙技术的多通道数据采集与传输系统

在介绍了主控制器接口协议、蓝牙模块二次开发设计方法的基础上,设计了四通道±10V模拟输入、四通道±10V模拟输出和RS232蓝牙适配器,实现了模拟式姿态、速率传感器信号的短距离无线传输.对蓝牙通信干扰进行了分析讨论,并对所设计蓝牙适配器进行了通信实验.结果表明:设计的蓝牙无线适配器能满足仿真系统对模拟信号的传输性能要求.     

B&WB-1950/25.41-M型超临界直流锅炉启动系统的调试

在介绍B&WB-1950/25.41-M型超临界直流锅炉启动系统构成的基础上,分析启动系统的调试情况,并对启动系统调试中发现的主要问题进行分析,并提出解决办法。     

基于非线性控制PWM整流器的锂电池充放电技术

针对传统采用晶闸管整流的充电机的缺点,设计了基于可逆PWM整流器的一种高效节能、高功率因数的锂电池智能充放电机.并基于整流器的无源性,采用阻尼注入方法设计无源功率控制器,提出采用状态观测器取代交流电压和直流电流传感器的方法,在保持整流器优良性能的前提下减少了传感器数目,降低了充电机成本.仿真结果表明基于状态观测器的充放电机PWM整流器无源控制系统,在输入电流总谐波扰动、直流电压稳态误差、直流电压动态误差、直流电压上升时间及功率因数等方面性能优异.