10-Bit single-slope ADC with error calibration for TDI CMOS image sensor

A 10-bit single-slope analog-to-digital converter (ADC) for time-delay-integration CMOS image sensor was proposed. A programmable ramp generator was applied to accomplish the error calibration and improve the linearity. The ADC was fabricated in a 180 nm 1P4M CMOS process. Experimental results indicate that the differential nonlinearity and integral nonlinearity were 0.51/-0.53 LSB and 0.63/-0.71 LSB, respectively. The sampling rate of the ADC was 32 kHz.     

住宅产业化的施工技术现状与应用

论述了住宅产业化施工技术中的预制构件吊装与节点控制技术、构件装配安全施工技术和构件校正方法,介绍了PC外墙板和PCF板的节点防水处理方法、PCF板校正工具和方法等。实践证明,采用预制件能有效地缩短施工总工期,加快施工进度,实现住宅的高效节能,低碳环保。     

A Comparison of the Effects of Practice Tests and Traditional Review on Performance and Calibration

The impact of practice tests on students' calibration and exam performance for multiple-choice and essay items was investigated. The participants were 59 graduate students enrolled in 1 of 2 sections (practice tests and no practice tests) of an introductory research methods in education course. Practice tests were associated with significantly lower scores on the midterm multiple-choice items and less accurate predictions and postdictions on those items. High-achieving students were more accurate in their calibrations than low-achieving students. Among low-achieving students, prediction and postdiction accuracy was significantly higher for essay than for multiple-choice items. In open-ended responses, a large percentage of students who took the practice tests indicated that they were a beneficial review strategy.     

Integrating different tracking systems in football: multiple camera semi-automatic system,local position measurement and GPS technologies

Abstract

During the past decade substantial development of computer-aided tracking technology has occurred. Therefore, we aimed to provide calibration equations to allow the interchangeability of different tracking technologies used in soccer. Eighty-two highly trained soccer players (U14–U17) were monitored during training and one match. Player activity was collected simultaneously with a semi-automatic multiple-camera (Prozone), local position measurement (LPM) technology (Inmotio) and two global positioning systems (GPSports and VX). Data were analysed with respect to three different field dimensions (small, <30 m² to full-pitch, match). Variables provided by the systems were compared, and calibration equations (linear regression models) between each system were calculated for each field dimension. Most metrics differed between the 4 systems with the magnitude of the differences dependant on both pitch size and the variable of interest. Trivial-to-small between-system differences in total distance were noted. However, high-intensity running distance (>14.4 km · h^?1) was slightly-to-moderately greater when tracked with Prozone, and accelerations, small-to-very largely greater with LPM. For most of the equations, the typical error of the estimate was of a moderate magnitude. Interchangeability of the different tracking systems is possible with the provided equations, but care is required given their moderate typical error of the estimate.     

University student’s goal profiles and metacomprehension accuracy

In this study, undergraduate students provided confidence ratings to predict future performance in answering questions drawn from the text before reading the text, after reading the text and after rereading the text. Self-reports of achievement goal orientations during reading and posttest scores were also collected. Student’s calibration index was the comparison between their predicted posttest performance and actual performance in the posttest. Correlational analyses did not reveal any statistically detectable relationships between self-reported goal orientations and monitoring accuracy, except that bias scores were marginally related to goal orientations. Further cluster analyses and analyses of variance (ANOVA) also showed that student’s multiple goal profiles failed to clearly differentiate the groups in terms of their calibration accuracy, yet performance-approach goals did distinguish overconfident from underconfident students. Plausible reasons for the finding were provided and implications for future research were also discussed.     

婴儿培养箱校准方法的探讨

婴儿培养箱的准确性对医院诊断治疗影响重大,建立一套完善的校准方法,定期开展对婴儿培养箱机进行校准是临床工作的当务之急。通过长期的实践摸索,我们对各种婴儿培养箱进行了系统的测试和论证,初步建立了一套可靠的校准方法。该方法科学合理,简便易行,各项指标评价结果符合仪器的设计性能及实际测试工作要求,对医学临床及法定计量检定机构开展婴儿培养箱的校准工作有一定的指导意义。     

一种EPC Gen2 RFID标签时钟校准方法

设计了一种对Gen2 RFID标签的振荡器频率进行校准的方法. 该方法设计了时钟校准命令; 并给出了读写器使用时钟校准命令对标签时钟频率进行逐次逼近的校准过程. 验证结果表明,带有8位校准寄存器的电路可以把时钟偏差从50%校准到0.4%以内.     

基于图像轮廓曲线提取的CT系统参数标定

CT系统安装时常存在误差,需对安装好的系统进行参数标定。基于图像轮廓曲线的提取,通过建立数学模型来标定CT系统参数,标定了CT系统探测器单元间的距离、旋转角度和旋转中心,并对对应标定参数进行误差分析。     

非线性ECS自配准成像算法中相位保持精度分析

为进一步提高InSAR系统的DEM精度,分析非线性ECS自配准成像算法中4个影响相位保持精度的因素。研究结果如下：雷达和散射体之间的相对速度等效误差非常小,可以忽略;当系统分辨率优于0.1 m时,非线性自配准中的二次近似误差会引起超过0.1个像素的误差,要考虑其影响;非线性变标中的二阶泰勒近似误差非常小,可以忽略;成像时采用的平地假设误差,主要会引起干涉运动补偿的轨迹误差和相位补偿误差,对于高精度InSAR系统（高程精度优于0.5 m时）,会造成一定的影响,要予以考虑。这些误差因素的分析,将为进一步优化提高InSAR成像处理中的相位保持精度及DEM精度提供一定的指导作用。     

一种基于高斯算法自动校准的多传感器磅秤系统

为了简化传统多传感器磅秤系统的调试校正流程,本文基于线性高斯算法,使用微控制器自动采集传感器数据并进行数据拟合,求解出多组较优应变参数,从而替代手动调节过程,实现了多传感器磅秤系统的调试校正自动化.