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    Meta分析的前世今生

    Meta分析也称荟萃分析,它的目的是对大量原始研究结果进行综合评价和系统分析,给出一个最终的指导性结果。举个简单的例子,新出来的抗癌药A在多个临床试验中呈现出不同的治疗效果,有的实验结果显示A药物能显著杀伤癌细胞,提高患者5年生存率,有的实验结果则说A药物并没有抗癌效果,那么到底A药物有没有效果?这里导致实验结果有很大差异的原因有很多,其中最主要的可能就是各个实验的样本量不足,使得统计效力降低。Meta分析最大的优势就是通过合并不同原始研究的效应量(OR值或β值)来提高样本量,这样能显著提高统计效力。比如A研究的样本量为100,B研究的样本量为200, C研究的样本量为50,这样通过meta分析可以使样本量达到350。

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    SS galaxy s9 Snapdragon 845VS Exynos9810-GPU Performance & Power

    Moving on to 3D and GPU workloads, we’re having a bit of a change in benchmarking format. I was very vocal about the current issue of peak and sustained performance.Particularly last year’s generation exasperated the issue of devices posting unrealistic performance figures which at the end were unsustainable for longer periods of time. This delta has become quite large to the point that posting only peak performance is just outright misleading and I no longer wish to support this reporting style anymore. Starting with today’s review, we’ll be showcasing GPU performance benchmarks with both their peak and sustained performances, and focusing on the sustained performance for evaluating things such as gaming performance.

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