热终轧温度及预先退火对高压阳极箔立方织构影响的研究

研究了热终轧温度及预先退火工艺对高压阳极箔立方织构的影响.热终轧温度及预先退火工艺对热轧板的原始取向及杂质存在形态都有很大的影响,而二者对成品箔立方织构的遗传性极强.因此,采用合理的工艺制度能为高压阳极箔立方织构比例的增强创造有利条件.结果表明,对于Fe、Si杂质含量小于15mg/kg高纯铝,采用热粗轧开轧温度500～530℃、热精轧终轧温度≥280℃、预先退火为400～450℃/2h的工艺制度,成品高压阳极箔具有很强的立方织构,立方织构比例可达到90%以上.     

Therapeutic Ultrasound Halts Progression of Chronic Kidney Disease In Vivo via the Regulation of Markers Associated with Renal Epithelial–Mesenchymal Transition and Senescence

Low-intensity pulsed ultrasound (LIPUS), a therapeutic type of ultrasound, is known to enhance bone fracture repair processes and help some tissues to heal. Here, we investigated the therapeutic potential of LIPUS for the treatment of chronic kidney disease (CKD) in two CKD mouse models. CKD mice were induced using both unilateral renal ischemia/reperfusion injury (IRI) with nephrectomy and adenine administration. The left kidneys of the CKD mice were treated using LIPUS with the parameters of 3 MHz, 100 mW/cm², and 20 min/day, based on the preliminary experiments. The mice were euthanized 14 days after IRI or 28 days after the end of adenine administration. LIPUS treatment effectively alleviated the decreases in the body weight and albumin/globulin ratio and the increases in the serum renal functional markers, fibroblast growth factor-23, renal pathological changes, and renal fibrosis in the CKD mice. The parameters for epithelial–mesenchymal transition (EMT), senescence-related signal induction, and the inhibition of α-Klotho and endogenous antioxidant enzyme protein expression in the kidneys of the CKD mice were also significantly alleviated by LIPUS. These results suggest that LIPUS treatment reduces CKD progression through the inhibition of EMT and senescence-related signals. The application of LIPUS may be an alternative non-invasive therapeutic intervention for CKD therapy.     

江西省煤矿瓦斯治理成效分析及设想

煤矿安全是安全生产工作的重中之重,瓦斯治理是煤矿安全生产的关键环节.经国务院第81次常务会议研究决定,从2005年起,在全国范围内开展煤矿瓦斯集中治理工作.     

分析传输线网络的电磁耦合问题

现代当微波辐照一个雷达接收机时,将对雷达接收机产生“带内”干扰但是当入射电磁脉冲作用于系统中的某一设备时,系统中的其他设备也很可能会受到影响。本文采用传输线网络拓扑模型来表示复杂系统,并运用BLT方程来分析传输线网络对电磁激励的响应。最后结合三种典型的系统结构进行了举例分析。     

基于S7-300的层流过滤器反冲洗控制系统

本文介绍了一种由西门子S7-300的PLC作为主控制器,对6台高速层流过滤器进行循环反冲洗的控制系统,详细论述了其电控系统的软硬件结构,为工业水处理系统的层流过滤器提供了一种新的控制方法。     

应用于机械手的磁致伸缩触觉传感器阵列与物体识别

利用磁致伸缩材料铁镓合金(Galfenol)设计制作了触觉传感单元,并将其集成为阵列,安装在二指机械手上.基于电磁原理、逆磁致伸缩效应和欧拉伯努利动力学原理,建立触觉传感单元力测量模型.设计的传感单元测力范围为0～3N,当压力小于1.5N时,灵敏度为151mV/N,在1.5～3N区间,灵敏度约为109mV/N,测量较低...     

驾车接近隧道过程中驾驶员瞳孔大小变化规律

为了解驾驶员驾车进入隧道过程中的瞳孔变化过程,让8位驾驶员分别驾车进入4座隧道,在此过程中用眼动仪记录驾驶员的瞳孔大小。分析眼动仪记录得到的驾驶员瞳孔大小数据的特征,通过小波变换进行数据处理,得到了驾驶员驾车进入隧道过程中瞳孔大小变化曲线。分析驾驶员瞳孔大小变化曲线发现,不同驾驶员的瞳孔大小存在个体差异;同一驾驶员多次测试的瞳孔大小存在一定的随机性;在接近隧道过程中驾驶员瞳孔逐渐变大,并在隧道洞口附近急剧变大;不同驾驶员的瞳孔变化趋势存在一定的差异;驾驶员瞳孔大小除受适应亮度的影响外,还受驾驶员的心理等因素的影响。     

Design of dual‐band microstrip patch antenna with right‐angle triangular aperture slot for energy transfer application

This work focusing on the dual‐band antenna design with rectifying circuit for energy transfer system technology for enhancement gain performance. The air gap technique is applied on this microstrip antenna design work to enhance the antenna gain. The work begins with designing and analyzing the antenna via the CST Microwave Studio software. After validation on acceptable performance in simulation side is obtained, the return loss, S₁₁ of the antenna is measured using vector network analyzer equipment. The rectifier circuit is used to convert the captured signal to DC voltage. This projected dual‐band antenna has successfully accomplished the target on return loss of ?44.707 dB and ?32.163 dB at dual resonant frequencies for 1.8 GHz and 2.4 GHz, respectively. This proposed antenna design benefits in low cost fabrication and has achieved high gain of 6.31 dBi and 7.82 dBi for dual‐band functioning frequencies.