基于行扫描灰度跳变分析的车牌定位系统的设计与实现

针对车牌定位速度慢,定位准确率不够高的问题,设计并实现了基于行扫描灰度跳变分析的车牌定位系统。该系统通过对图像进行垂直和水平方向的行扫描,并结合车辆牌照自身的特点,分析图像的灰度跳变特征,实现对车辆牌照的定位。并用visual C++实现了该车牌定位系统,实验结果表明该系统定位速度快、准确性较高,具有较好的实用价值。     

常见抢答器PLC程序的误差分析与改进

用PLC实现抢答器的各种功能,其原理是基于电气控制系统中的继电器一接触器控制电路,利用自锁和互锁功能实现。由于PLC采用的是集中采样、集中输出、循环扫描的工作方式,即串联逻辑控制,照搬继电器控制的编程方式,对于抢答器的抢答结果有很大误差。文章分析了误差产生的原因,并给出了消除误差的另一种编程方法。     

谈系统漏洞扫描

对系统漏洞和系统漏洞扫描进行了探讨,主要分析了系统漏洞的分级以及常见的漏洞及其攻击方法,介绍了基于主机的漏洞扫描和基于网络的漏洞扫描的区别,并重点对网络扫描进行了研究。     

加热炉工艺对集装箱钢边部缺陷影响浅析

用SEM扫描电镜法分析了典型缺陷产生的原因,排除了这些表面缺陷并非由于连铸结晶器保护渣引起,最终通过调整加热炉工艺制度解决了表面缺陷。     

洛伐他汀的电化学行为及其分析应用

在0.16 moll-1Na2B4O7-KH2PO4(pH7.4)-20?H5OH的支持电解质中,提出了一个新的测定洛伐他汀的单扫描极谱法.洛伐他汀于-1.49 V产生一还原波,被归因于洛伐他汀分子中内脂环上羰基的还原.峰电流与洛伐他汀的浓度在1.0×10-7-1.4×10-5mol l-1范围内呈线性关系,其检测限为6.0×10-8mol l-1.提出的方法被用于胶囊中洛伐他汀的测定,结果满意.与现有的方法相比,提出的方法具有简便、快速、灵敏的特点.本文并对还原波的电化学特征进行了较详细的讨论.     

基于博弈论的防火墙、入侵检测系统和漏洞扫描技术的最优配置

为了解决基于攻击检测的综合联动控制问题,用博弈论方法对防火墙、入侵检测系统(IDS)和漏洞扫描技术的安全组合模型进行分析.采用逆序归纳法研究了仅配置IDS和漏洞扫描技术组合、配置所有技术组合的Nash均衡.结果表明,当IDS和漏洞扫描技术检测率较低时,公司不仅需要监测每个报警的用户,还需监测未报警的一部分用户;当IDS...     

Systematic studies on scan and driving model for flat panel display

Aiming at the time redundancy in the flat panel display (FPD) imaging process, the paper studied some problems for FPD gray scale controlling based on the fractal theory, dissertates the construction of the space-time mapping topology architecture, the proposition of optimal scanning structure for FPD’s gray imaging, and the creation of the fractal theoretic model. Then the logic implementation and system application are presented based on the fractal model of the optimal scan architecture, and the application results achieved target of eliminating time redundancy and increasing the scanning availability. The novel control mode that the fractal scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system.     

Systematic studies on scan and driving model for fiat panel display

Aiming at the time redundancy in the flat panel display (FPD) imaging process,the paper studied some problems for FPD gray scale controlling based on the fractal theory,dissertates the construction of the space-time mapping topology architecture,the proposition of optimal scanning structure for FPD's gray imaging,and the creation of the fractal theoretic model. Then the logic implementation and system application are presented based on the fractal model of the optimal scan architecture,and the application results achieved target of eliminating time redundancy and increasing the scanning availability.The novel control mode that the fractai scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system.     

激光诱导聚合物表面周期性微结构的快速制备研究

采用波长355nm的紫外偏振激光，通过步进扫描法在聚酰亚胺（BDTA—MMAD）薄膜表面制备了激光诱导周期性表面微结构（LIPSS），采用原子力显微镜（AFM）分析了LIPSS图形质量及几何尺寸，考察了X、Y方向扫描速度和扫描步长等参数对LIPSS制备的影响，发现随着X方向扫描速度和Y方向扫描步长的增大，由于薄膜表面受到激光辐射累积能量降低，LIPSS图形质量明显下降。但是，在提高Y方向扫描步长的同时提高激光辐射能量，仍能在较快速度下制得规则的LIPSS结构。根据实验结果提出了实现LIPSS快速制备的优化条件，并探讨了LIPSS的形成机理。     

Predictive value of serum thyroglobulin in treated patients with differentiated thyroid carcinoma

An in-house radioimmuno assay for serum thyroglobulin was developed in our laboratory and compared its relative sensitivity with that of whole body scan in the detection of residual tumour or metastases and evaluated the predictive value of serum thyroglobulin in the clinical course of the disease. Ninety six patients after thyroidectomy were followed up for a maximum period of five years in this study. The sensitivity and specificity of serum thyroglobulin were found to be close to that of whole body scan (85% and 94% respectively). According to this study, a serum thyroglobulin >40 ng/ml can differentiate between patients with metastases and those in remission. Serum thyroglobulin can replace whole body scan during the subsequent follow-up if the patient had concordant whole body scan and serum thyroglobulin during initial assessment.