During the past two decades, the field of medical imaging has achieved dramatic improvements in imaging system capability with accompanying increases in system complexity. Much of this progress has been fueled by advances in computing technology and the widespread adoption of digital techniques for data acquisition, processing and display. Although every branch of medical imaging has been significantly affected, the most striking examples ofthis revolution are x-ray computed tomography and magnetic resonance imaging. Fortunately, a consensus on quantitative measurement methodology for assessing diagnostic imaging technologies has been gradually emerging. It has grown out of the recognition of common features among imaging modalities that allows their limitations to be understood within the framework of statistical decision analysis.

电压质量评估模型（内含数据与python代码）。 提供给最终用途设备的电力质量取决于公用事业公司提供的电压质量。如果电压在额定频率下具有额定值，则称其具有质量，而没有任何偏差。

2010药品GMP指南-质量控制实验室与物料系统，帮助了解GMP中质量控制实验室与物料系统建立

The structural similarity image quality paradigm is based on the assumption that the human visual system is highly adapted for extracting structural information from the scene, and therefore a measure of structural similarity can provide a good approximation to perceived image quality. This paper proposes a multi-scale structural similarity method, which supplies more flexibility than previous single-scale methods in incorporating the variations of viewing conditions. We develop an image synthesis method to calibrate the parameters that define the relative importance of different scales. Experimental comparisons demonstrate the effectiveness of the proposed method.

22届陕西省高三教学质量检测试题（二）理数试题及答案

2022届陕西省高三教学质量检测试题（二）文数试题及答案

整个It项目开发过程所需的报告都齐全 IT项目计划管理 软件测试管理 软件项目计划书 可行性计划报告书 软件质量保证计划

用激光雷达反演气溶胶质量浓度的空间垂直分布是环境监测领域的重点研究内容之一。利用激光雷达测量得到的地面消光系数和振荡天平获得的地面质量浓度，建立起质量浓度与消光系数之间的关联，再通过消光系数的垂直分布反演质量浓度的垂直分布。基于这一思想，采用两种模型进行了拟合和相关性分析。实验表明用这两种模型反演的质量浓度空间分布相关性好，数据量级与实际相符，具有一定的可信度。模型易于实现，计算简单，可实现在线实时检测。

为了利用激光雷达探测的消光系数垂直分布来反演气溶胶质量浓度的垂直分布,研究气溶胶消光系数与质量浓度之间的关系就显得十分重要。根据Mie散射理论,分析了气溶胶的质量消光系数、消光系数和质量浓度之间的关系,引进了等效参数,分析了Junge指数对等效参数的影响,用实际测量的粒子谱分布、能见度、相对湿度和气溶胶质量浓度验证了气溶胶消光系数和质量浓度之间的关系。这对利用激光雷达测量的气溶胶消光系数垂直分布来反演气溶胶质量浓度的垂直分布是很有实用价值和指导意义的。

规范培训-数据质量管理分册.