基于模糊理论的缺陷检出可靠度模型

分析了缺陷无损检测可靠性的度量问题,通过大量试验数据拟合出缺陷检出率隶属度函数,构建了缺陷检出可靠度的模糊数学模型,最后对飞机机翼大梁螺栓孔退役机件的裂纹长度进行磁粉探测和JFY-1A仪器检测,采用该模型分别计算了两种检测方法在缺陷尺寸临界区间的裂纹检出可靠度,并以金相法检测结果为标准进行对比,验证了模型的有效性。     

埋地钢质管道外防腐层的检测与评估

埋地钢质管道的外防腐层是管道防止腐蚀破坏的手段,埋地管道外防腐层的损坏哪怕是微小的破损,对管体的腐蚀是致命的,保护管道的外防腐层,及时做出正确的评估,以便在节约效能的前提下,有的放矢的进行开挖和修复是防止管道泄漏的有效手段。     

一种Link16信号的检测识别算法

在Link16信号侦察中,Link16信号的检测识别是实现信号分选的基础和关键。设计了一种基于双滑动窗的自适应双门限Link16信号检测识别算法,具有检测识别准确率高、实时性好、易于工程实现的特点。仿真结果表明,当信噪比在7 dB以上时,脉冲检测识别正确率均在95〖WT《Times New Roman》〗%〖WTBZ〗以上。     

超宽带穿墙探测雷达的运动目标检测技术

提出了利用低频超宽带(UWB)脉冲信号实现穿墙探测的设想，研究了超宽带穿墙探测雷达(UWB—TWDR)的运动目标回波信号模型，并基于运动目标回波信号的相关性，利用相干叠加原理对多次观测的结果实现运动目标的检测。最后通过具体的穿透混凝土砖块墙壁实测实验验证了上述设想和算法。     

巡航导弹探测技术述评

巡航导弹防御正日益受到各国的广泛关注，而巡航导弹探测是其中的重要一环。本文对巡航导弹探测中最主要的两部分一红外探测与雷达探测技术作了较详细的分析与评价，并着重介绍了一些用于探测巡航导弹的新体制雷达。     

一种新的快速视频图像边缘检测算法

一般常用的边缘检测算法计算量较大，对细小边缘检测效果较差，不适合实时边缘检测系统。针对这一问题，本文提出一种连续分割的快速边缘检测算法：从相互垂直两方向分割梯度图像，提取截面曲线极大值获得图像边缘，使用形态学梯度，检测出细小的图像边缘。实验结果表明此算法较Canny等经典算法减少了计算量，提高了边缘检测精度。     

The Effectiveness of Alternative Risk Assessment and Program Planning Tools in a Fraud Setting*

This study examines the impact of alternative risk assessment (standard risk checklist versus no checklist) and program development (standard program versus no program) tools on two facets of fraud planning effectiveness: (1) the quality of audit procedures relative to a benchmark validated by a panel of experts, and (2) the propensity to consult fraud experts. A between‐subjects experiment, using an SEC enforcement fraud case, was conducted to examine these relationships. Sixty‐nine auditors made risk assessments and designed an audit program. We found that auditors who used a standard risk checklist, structured by SAS No. 82 risk categories, made lower risk assessments than those without a checklist. This suggests that the use of the checklist was associated with a less effective diagnosis of the fraud. We also found that auditors with a standard audit program designed a relatively less effective fraud program than those without this tool but were not more willing to seek consultation with fraud experts. This suggests that standard programs may impair auditors' ability to respond to fraud risk. Finally, our results show that fraud risk assessment (FRASK) was not associated with the planning of more effective fraud procedures but was directly associated with the desire to consult with fraud specialists. This suggests that one benefit of improved FRASK is its relation with consultation. Overall, the findings call into question the effectiveness of standard audit tools in a fraud setting and highlight the need for a more strategic reasoning approach in an elevated risk situation.     

Design of economic information. A pilot study of accounting information in decision-making processes

Accounting information is developed for an analytic decision-making process, whereas many farmers use an intuitive process. The aim is to determine the decisions and parts of the decision-making that farmers use for accounting information, and to what extent accounting information would be more useful if it was designed to fit the decision-making process used. A limited sample of milk-producing farmers in Uppsala County, Sweden, was studied. For detecting scale problems, the values of the financial statement were of primary importance and the design of the profit and loss statement was of secondary importance. For detecting efficiency problems, the values of the profit and loss statement were most important, the content of the commentary information was the second most important, and the design of the financial statement was the third most important. Farmers using an intuitive decision-making process perceived problem detection to be easier if the information was designed to fit the intuitive process. However, farmers using an analytic decision-making process did not perceive problem detection to be easier if the accounting information was designed to fit the analytic process. Also they valued the information designed for the intuitive process.     

一种通用的数据采集系统设计及其FPGA实现

基于多相滤波技术和能量检测方法,完成了一种通用的数据采集系统设计及其FPGA实现,可兼容低速、高速和突发信号的采集。仿真和实测结果表明,该系统满足实际需要。