跳频信号的归一化多普勒频差最大似然估计

针对双站定位涉及的跳频信号多普勒频差估计问题，提出了归一化的频差最大似然估计算法，利用两个定位站接收到的跳频脉冲串信号，构建一个关于基准跳频频率多普勒频差的似然函数，通过网格搜索得到使似然函数最大的多普勒频差估计，既解决了跳频信号在不同跳频频率上多普勒频差不一致的问题，又充分利用在不同频率的脉冲串信号提高了多普勒频差估计精度。通过仿真对算法的性能进行了评估，结果表明，与基于子空间的算法比较，在脉冲数达到240个时，所提算法执行效率提升30%以上。     

利用频移动态特征的辐射源目标盲分选

利用辐射源目标的频移动态特征进行盲分选时，针对已有的分选方法不能很好解决非合作接收数据非周期、间断、交叠的问题，提出了一种改进的逻辑回归分选算法,将信号分选转化为轨迹分类的问题来处理。首先，借鉴多目标航迹起始模型中的M/N逻辑法的框架，设计新的数据关联门限，以建立目标起始曲线；其次，采用最小二乘拟合方法替代卡尔曼滤波，设计新的外推规则，建立载频变化预测曲线；分析新的接收数据与预测曲线的关联性，不断迭代回归或形成新的分支，最后获得目标分选结果。仿真与实测试验表明，利用逻辑回归分选算法，对不同运动目标搭载的同频辐射源可进行自动分选，4个仿真目标与2个真实目标的分选正确率达到100%。同时，该方法拓展了辐射源目标盲分选中的动态频移特征应用，为辐射源个体识别提供了新的支持。     

Audit as Leviathan: Constructing Quality Registers in Swedish Health Care

This paper explores the rise of an audit practice: the national quality registers in Swedish health care. Based on actor‐network theory, the study tells the story of an actor‐network formed by physicians in the 1970s who mobilized themselves around a common object; to develop the knowledge‐base of medical professionals. However, over time more actors became persuaded of the potential of the network and associate themselves with it, resulting in reformed registers. The study shows how the network develops into a macro‐actor, a Leviathan in health care, how this macro‐actor comes to affect health care practices and how it contributes towards maintaining a new governance regime.     

一种SAR与可见光图像压缩感知融合增强方法

针对机载多传感器成像战场态势感知的问题，提出了一种合成孔径雷达(Synthetic Aperture Radar，SAR)与可见光图像压缩感知融合增强方法。该方法首先对SAR与可见光图像分别进行压缩感知测量，得到压缩测量值，然后通过基于局部权值的融合方法实现对压缩测量值的融合，再利用有序度最优分割法提取SAR图像的强散射目标，最后对融合测量值重建得到初步融合图像，初步融合图像通过目标对比度增强得到最终融合图像。对多组图像进行了仿真分析，视觉及数值结果表明该方法能显著增强融合图像的目标对比度，提升了图像纹理清晰度，较大程度降低了图像融合过程中的数据计算量。     

Analysis of LPG,electric and induction cookers during cooking typical Ecuadorian dishes into the national efficient cooking program

This research aims to analyze cooking parameters in liquefied petroleum gas (LPG), electric resistance and induction stoves for eight dishes of the Ecuadorian cuisine. During tests, it has been monitored the temperature, time, electrical grid parameters, concentrations of CO and CO₂. In addition it has been studied the microbiological and physiochemical changes produced by the thermal treatment in food and a discriminative triangular test for determining the differences in the consumers perception between samples made with induction and LPG based stoves. The results showed which even with an exhaust hood working, there was still a significant value of concentration of CO and CO₂ during cooking with a LPG stoves. As a result of these analyses the induction stove shows a better response during the heating process and energy efficiency which have influence in temperatures, taste, vitamin preservation, cooking times, energy consumption and cost to the user.     

隧道工程岩爆地段施工技术措施

本文简要介绍岩爆产生的原因,岩爆分类及特征。通过怀玉山隧道岩爆段的工程实例的分析,得出该隧道所遇岩爆类型为弹射型岩爆。根据弹射岩爆的特点结合施工经验,制定相关技术措施,安全、有效、顺利完成岩爆段的施工。     

商品混凝土出现裂缝的原因及预防控制措施

在阐明混凝土裂缝的类型和机制的基础上,分析商品混凝土与普通混凝土的区别,并就商品混凝土易出现裂缝的原因提出具有针对性的预防控制措施。     

SUCCESSIVE MEASUREMENT EXPERIMENTS

Abstract. We consider methods for the analysis of successive measurements, with emphasis on practical usefulness. It is described how the methods can be applied by using common techniques like regression analysis and analysis of variance.     

美国新发布的“公允价值计量”准则及其启示

对公允价值的大胆肯定和积极使用,无疑将带来一场新的会计革命.从美国会计准则的发展来看,公允价值正在得到越来越多的使用,大有超越历史成本跃升为主要计量属性之势.美国“公允价值计量”准则的发布,是对这一趋势的最佳诠释,标志着国际会计界对公允价值的关注已从早期的“是否采用”转变为“如何用好”,这将给我国会计界以深刻的启发.本文在对美国新发布的“公允价值计量”准则进行介绍和评价的基础上,分析了该准则对改进我国公允价值应用的借鉴意义.     

干涉自相关与光谱联合测量超短脉冲啁啾

提出了联合测量超短激光脉冲混合啁啾量值的方法,这种方法是基于干涉自相关包络宽度及超短激光脉冲光谱宽度随啁啾量值的变化而变化.通过对干涉自相关信号包络宽度及超短激光脉冲光谱宽度的理论分析,得到干涉自相关包络宽度及超短激光脉冲光谱宽度与啁啾量值之间的对应关系,获得联合测量混合啁啾量值的方法.采用干涉自相关二次谐波检测系统对加浓染料激光器输出的脉冲进行测量,利用该方法测量出被测超短激光脉冲的线性啁啾值及平方啁啾值.根据干涉自相关包络信号及超短激光脉冲光谱,分别独立测量超短激光脉冲混合啁啾值,从而实现了对超短激光脉冲啁啾值的确定性测量.