two-signal test method

By means of the mechanical method of two sets of closed system of force and elasticized closed sub-system of force, a test on enlarging tonnage capability of the high frequency tensile and compression fatigue testing machine has been evaluated.

本文利用二套封闭力系及子封闭力系弹性化的机械方法，在小吨位高频拉、压疲劳试验机上首次完成了超吨位试验的技术签定。

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The article briefly introduces the basic law and method of statistic test of earthquake prediction efficiency and two statistic evaluation methods, i.e. Z grading of prediction efficiency value and V grading of correlative evaluation.

简要介绍了地震预报效能统计检验的基本原理和方法及二种统计评分方法：预报效率值Z评分和相关的V值评分。

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Different from above mentioned two methods, the rupture mode of the trapezoidal tear test is simple and the testing results are stable. Thus, this method is recommended for testing tear strength of architectural membrane materials.

梯形撕裂法的撕裂模式单纯，试验结果也较稳定，是值得推荐的膜材料撕裂强度测试方法。

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Through example two statistic amendment methods for 'reverse order' data of stockpile reliability test of air ammunition are studied, the incomplete method is mended and the rule of parameter vale selection of amendment function is presented.

文中通过实例，对两种逆序数据的统计修正方法进行了研究，对存在问题的方法进行了改进，并得出了修正函数参数的取值规律。

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Based on the data of packaging product dropping test and the shock spectrum, a new method is presented to determine the fragility of packaging products under complex excitation by the two index of critical acceleration and critical displacement.

以产品跌落试验实测数据为依据，讨论了一种基于易损零件冲击谱，用临界加速度和临界位移两个指标确定产品易损性的新方法。

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