随机删失场合半参数回归模型参数估计的重对数律‘

本文探讨了随机删失场合半参数回归模型的参数估计问题.考虑半参数回归模型Y =X}}3 + g(T)十。，其中(X,T)’为取值于Kp X [0,1〕上的随机向量，月为1'维未知参数向量，8为定义于【0.1]上的未知函数，。为随机误差，Ee = 0 . Eez = az }。未知，且(X ,T)与。独立，).被一个与之独立的随机变量V所截.此时仅能观察到:Z=min(Y,V),o=1(Y簇V)，参数I3,az的估计量禽及公 z可综合非参数的权函数估计法与参数的最小二乘估计方法得到.本文对核函数的情形得到了念及ar z的精确收敛速度即重对数律.     

一种针对FPGA位流的自动化故障注入分析方法

理论上通过篡改FPGA位流,利用其实现的密码算法的错误输出可以分析出密钥,但这种攻击通常需要非常了解目标FPGA的内部结构与位流的对应关系。而位流逆向的难度很大,导致此类攻击的实用性不高。文章提出一种针对FPGA位流的自动化故障注入分析方法,不需要逆向位流,结合张帆等人提出的持久性故障分析理论,把因篡改算法常量导致的出错结果作为可利用的故障。并首次在Xilinx-7系列FPGA开发板上利用Spider进行电压故障注入实验,480条错误密文就可以得到AES-128的密钥,且在10 min内可以完成数据的采集和分析。对于加密位流的情况,可以先利用电磁侧信道分析方法得到明文位流,再结合该文的分析方法来进行密钥破解。     

改进的基于梯度幅值的自适应边缘检测算法

分析文献[1]给出的算法.针对其中存在的问题和不足,给出了一个改进算法.实验结果表明,改进算法弥补了原文算法中的缺陷,在获取连续边缘的同时也较好地抑制了噪声,在运算效率方面有了明显的提升,并节省了大量的内存空间.     

挠性杆弯曲刚度测量的研究

挠性杆是挠性加速度计的关键零件,本文针对挠性杆尺寸细小,难以进行弯曲刚度测量的问题进行了分析。提出了一种新的测量方法,采用视觉传感器实时自动取样并计算挠性杆单端夹持时另一端的下垂角度,进而计算挠性杆的弯曲刚度。理论计算和测试结果表明,该方法可有效解决小尺寸挠性杆弯曲刚度监测中的精度低、操作困难、效率低下等问题。     

Uniform limit laws of the logarithm for nonparametric estimators of the regression function in presence of censored data

In this paper, we establish uniform-in-bandwidth limit laws of the logarithm for nonparametric Inverse Probability of Censoring Weighted (I.P.C.W.) estimators of the multivariate regression function under random censorship. A similar result is deduced for estimators of the conditional distribution function. The uniform-in-bandwidth consistency for estimators of the conditional density and the conditional hazard rate functions are also derived from our main result. Moreover, the logarithm laws we establish are shown to yield almost sure simultaneous asymptotic confidence bands for the functions we consider. Examples of confidence bands obtained from simulated data are displayed.      

关于家庭电气自动控制技术相关问题的研究

由于伴随着持续发展的自动控制、现代通信、计算机技术,这就逐步产生智能化建筑,所谓的智能小区则是扩展与延伸智能化大楼,人们往往借助优化考虑小区建筑群的服务、结构、管理、系统这四个基本要素,提供出一个便利、舒适、投资合理、安全、温馨、效率高的人居环境。以便可以将当前我国住宅建设科技含量增强与发展加快的要求。     

火试金法配料过程自动化的探索和应用

火试金法中配料方式采用的是传统的人工配料,针对人工配料方式的不足,设计了一款自动化程度较高的自动配料机,通过对配料机的准确性、效率及可靠性实验,结果表明配料机检测称量误差在±0.2 g以内,效率为人工配料的2~3倍,检测结果与人工配料的相一致。与此同时,应用此设备改善了工作环境,避免了人为失误造成的检测质量问题,降低了复检率,为企业降低了成本,提高了效益,在业内具有广泛应用前景。     

A semi-automatic method for measuring interferometry fringes: prototype design and first results

A device for automatically obtaining the information contained in holographic interferometry fringes is proposed. The method may be applied to any kind of interferometric fringes. Accuracy has been demonstrated by contrasting the results obtained with our prototype system and those with the single-beam speckle interferometry technique for the measurement of displacements in a plane. The results show good correlation between the two series of measurements.     

Fuzzy rule generation methods for high-level computer vision

In many decision making systems involving multiple sources, the decisions made may be considered as the result of a rule-based system in which the decision rules are usually enumerated by experts or generated by a learning process. In this paper, we discuss the various issues involved in the generation of fuzzy rules automatically from training data for high-level computer vision. Features are treated as linguistic variables that appear in the antecedent clauses of the rules. We present methods to generate the corresponding linguistic labels (values) and their membership functions. Rules are generated by constructing a minimal approximate fuzzy aggregation network and then training the network using gradient descent methods. Several examples are given.     

通用稳态电路分析平台的设计

电路计算中通常需要进行大量的矩阵计算。现已广泛使用计算机对电路进行辅助分析和设计。平台采用具有通用性的列表法,利用Matlab的强大的计算功能和它的GUI界面开发的功能,实现了对稳态电路的自动求解。用户不需要编程,只需输入电路的相关信息,便可直接计算出电路中的各个结点电压、支路电压、支路电流,并且画出各种所需波形图。平台为稳态电路的分析提供了有效的辅助工具,特别是能应用在模拟电路的教学中。