基于LM3S811的帆板控制系统设计与实现

设计并实现了一个帆板自动控制系统。以32位ARM微控制器LM3S811为控制核心,在设定的模式和间距（风扇与帆板之间的距离）下,对帆板转角的控制进行了实验分析与讨论。实验中采用PWM技术和PID控制器来调节风扇风力的大小,从而实现对帆板转角的实时控制。整个系统软硬件设计合理、操作简单方便,控制精度较高。实验结果进一步验证了设计方案的正确性,证实了所设计的系统具有一定的理论研究意义和实用性。     

Promoting Si-graphite composite anodes with SWCNT additives for half and NCM811 full lithium ion batteries and assessment criteria from an industrial perspective

Single wall carbon nanotube (SWCNT) additives were formulated into µm-Si-graphite composite electrodes and tested in both half cells and full cells with high nickel cathodes. The critical role of small amount of SWCNT addition (0.2 wt%) was found for significantly improving delithiation capacity, first cycle coulombic efficiency (FCE), and capacity retention. Particularly, Si (10 wt%)-graphite electrode exhibits 560 mAh/g delithiation capacity and 92% FCE at 0.2 C during the first charge-discharge cycle, and 91% capacity retention after 50 cycles (0.5 C) in a half cell. Scanning electron microscope (SEM) was used to illustrate the electrode morphology, compositions and promoting function of the SWCNT additives. In addition, full cells assembled with high nickel-NCM811 cathodes and µm-Si-graphite composite anodes were evaluated for the consistence between half and full cell performance, and the consideration for potential commercial application. Finally, criteria to assess Si-containing anodes are proposed and discussed from an industrial perspective.     

对艾柯夫SL500采煤机摇臂座的技术改造

由于神东矿区煤层的特殊性,在使用艾柯夫公司SL500型采煤机时,摇臂座出现了裂缝。为此对该机进行了认真研究和分析,对其摇臂座进行了技术改造,改造后的摇臂座使用效果良好。     

Block Compressed Sensing Image Reconstruction Based on SL0 Algorithm

By applying smoothed l₀ norm (SL0) algorithm, a block compressive sensing (BCS) algorithm called BCS-SL0 is proposed, which deploys SL0 and smoothing filter for image reconstruction. Furthermore, BCS-ReSL0 algorithm is developed to use regularized SL0 (ReSL0) in a reconstruction process to deal with noisy situations. The study shows that the proposed BCS-SL0 takes less execution time than the classical BCS with smoothed projected Landweber (BCS-SPL) algorithm in low measurement ratio, while achieving comparable reconstruction quality, and improving the blocking artifacts especially. The experiment results also verify that the reconstruction performance of BCS-ReSL0 is better than that of the BCS-SPL in terms of noise tolerance at low measurement ratio.     

西门子802D sl自定义界面在数控转塔冲床上的应用

以西门子802D sl数控系统为平台,在数控冲床上开发自定义界面,实时显示及修改机床冲压工艺参数,简化编程,提高加工效率。     

基于S3 C44B0X和SL811 HS的USB主/从机模块设计

提出一种基于S3C44B0X及SL811HS构建USB主/从机控制器模块的方案,给出了硬件连接及软件设计流程.经证实该方案设计简单,可靠性高,可重用性强.     

两种电热爆炸喷涂层高温防腐性能对比研究

采用电热爆炸喷涂方法在45钢基体上制备高铬镍基45CT、SL30涂层,分别在800℃对两种涂层进行氧化和氯化腐蚀测试,研究涂层在高温状况下的腐蚀行为,同时借助SEM、XRD等检测手段,分析涂层在高温环境中的腐蚀特点及腐蚀机理.通过各项测试可以看出这两种高铬含量喷涂层组织致密,孔隙率极低,与基体材料具有优异的结合性,以冶金结合方式存在,其中SL30涂层组织更为致密,同时较45CT涂层平滑.此外,SL30喷涂层表现出了更为优异的耐蚀性,高温耐蚀效果好于45CT涂层.     

90%敌敌畏可溶性液剂的配方研究

通过试验,筛选出的乳化剂解决了敌敌畏乳油的自动分散性问题,最终确定了90%敌敌畏可溶性液剂的优化配方。此配方各项技术指标和热贮稳定性测定均达到可溶性液剂的质量标准。     

基于USB主机的嵌入式数据采集系统的设计和应用

设计了一个基于USB主机的嵌入式数据采集系统,使用AT89C55WD单片机和USB接口芯片SL811HS完成了USB主机功能,实现了对Mass Storage类设备U盘的控制.系统采集的数据按FAT16文件系统的格式存入U盘.结合原油脱水电源电参数检测的需要,选用ADS7841作为A/D转换芯片,以DS1302作为实时时钟芯片.实验及油田现场应用表明:该系统使用方便,数据记录准确,数据存储稳定可靠.     

微小精密滴灌灌水器快速成形误差对流态特征的影响

采取多种成形角度制造出试验用滴灌灌水器光固化快速成形原型件,通过流量-压力试验得出不同成形角度下灌水器的流量变化规律,并与塑料灌水器产品的流量进行对比得出水力误差。以新型涡流灌水器为例,研究结果显示不同成形角度下灌水器的流量系数变化较大,而流态指数没有明显的改变,定量结果表明该种灌水器在40°的成形角度下制造误差最小。