磁流变阻尼器的电流驱动器设计与实验研究

采用Buck型变换器和电流模式PWM开关控制方案,设计了车用磁流变阻尼器的电流驱动器,研究了其硬件电路组成,介绍了磁流变阻尼器的电流驱动器的性能测试系统并进行了测试实验。     

DPU-3445位图驱动程序的设计与实现

介绍DPU-3445的特点、接口和位图输出命令格式，给出了其位图驱动程序对BMP文件进行数据加工的C源程序代码。     

国产刮板捞渣机在德士古煤浆气化装置中的使用

改进后的国产ＧＢＬ／Ｈ－１．２×１５型刮板捞渣机在德土古加压水煤浆气化装置中使用获得了满意的结果。对其结构特点作了详细的介绍。     

汽车加速踏板科学定位实验研究

首次提出加速足椭圆及驾驶员正常子工作区概念。介绍汽车驾驶员P95加速足椭圆的测量、生成、定位和应用。该研究扩展了Ayoub的测量装置的功能和测量方阵,并扩展了Squires、Farley和Das关于正常工作区域的概念。该系列研究可能对其它陆路、水域或空中运行机具驾驶员工作设计产生积极影响。     

一种测量光驱振幅的简单方法

提出一种可测量振动频率 1.5kHz光驱振幅及光盘裂纹的简单实用方法。该方法通过激光束在光盘与平面镜之间的多次反射 ,将光盘振动引起的光偏移量放大 ,从而简化了光盘振幅的测量。介绍了该方法的基本测量原理、光刀形成方法及信号采集、处理电路的设计 ,并给出了测试实例     

基于二阶系统的伺服电流调节器的参数整定

通过对一种交流伺服驱动器系统的结构分析,建立了系统数学模型。在结合控制理论和工程实践的基础上,分析影响系统性能的几个因素。根据系统的设计目的,介绍了电流调节器参数的整定办法,并给出了实验结果。     

RESEARCH OF A HIGH EFFICIENCY SLIDING SCREW DRIVER

A high efficiency sliding screw driver is introduced. It can improve driving efficiency obviously. As the material strength of the nut in this structure is low and the nut is the most dangerous part, so it is important to master the structure's characters of deformation and stress. The deformation and stress of this structure are researched by finite element method(FEM), and the changing law of stress concentration coefficient of the structure is gained. So the exact stress of nut teeth with highest load can be calculated directly based on this result.     

计算机数控串珠绳锯切割机

采用模糊控制技术、变频传动技术、步进驱动技术研制出计算机数控串珠绳锯切割机.该机使用带闭环的变频传动技术取代传统的伺服传动,切割精度为0.15mm.采用IPC工控机和西门子S7-200PLC为主控机,人机界面好,易于编程.改变生产品种,只需修改数控程序,而不需制做模型,大大节省了投资.     

驾驶员运动视力的研究

本文根据交通标志中汉字的高度及视认距离,推算出了满足停车距离需要的最低运动视力许用值。通过对1000多名驾驶员的实测统计分析及显著性检验,证实了驾驶员的运动视力在“事故”群中平均衰减45％,无事故群平均衰减39％。说明运动状态的视力衰减严重是导致交通事故的重要原因之一。     

Developing a New qPCR‐Based System for Screening Mutation

An accurate genotyping analysis is one of the critical prerequisites for lung cancer targeted therapy. Here, a quantitative polymerase chain reaction (qPCR)‐based mutation detection system, mutation‐selected amplification‐specific system PCR (MASS‐PCR), is developed. The specific primers and probes used in MASS‐PCR exactly match with the mutant sequence that only allows mutant gene to emit the fluorescence peak. To determine the sensitivity of MASS‐PCR, 717 lung cancer specimens, 61 formalin‐fixed paraffin‐embedded (FFPE) tissues, and 656 fresh reaction tissues are collected and undergo mutation detection of lung cancer driver genes (EGFR, KRAS, BRAF, HER2, MET, ALK, and ROS1). These samples are divided into two groups. Mutations in Group I, which has 631 fresh reaction tissues, are analyzed by MASS‐PCR and the amplification refractory mutation system PCR (ARMS‐PCR). While group II samples, 25 fresh reaction tissues and 61 FFPE tissues, are screened through MASS‐PCR and next‐generation sequencing (NGS). All results are verified by direct sequencing. MASS‐PCR shows high consistency with ARMS‐PCR (kappa value > 0.733) and NGS (kappa value = 0.79) (P < 0.001). For the samples with inconsistent MASS‐PCR and ARMS‐PCR results, DS results more likely support the MASS‐PCR results. These data suggest that MASS‐PCR is a convenient, accurate, and economical method for the detection of lung cancer driver gene mutations in clinical practice.