（3）比分检验 比分检验（score test）是以未包含某一个或几个变量的模型为基础，保留模型中参数的估 计值，并假设新增加的参数为0，计算似然函数的一阶偏导数（又称有...
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单因素生存分析用寿命表法计算，以生存曲线描述生存率，并进行Gehan比分检验。
Cox regression was used to screen out single and multiple risk factors. Cumulative survival rate was calculated by life table and Gehan score test.
简要介绍了我国现行压力容器、压力管道定期检验规范体系，并与相应的API规范进行了对比分析。
In this paper, the current periodic inspection regulation system for pressure vessel and pressure piping in China is briefly introduced, comparing to related API standards and codes and RPs.
介绍了焦炭强度检验在不同取样点的试验情况，对试验结果进行了对比分析，说明了不同取样点对焦炭强度的影响。
Introduce the checking situation of different sample point of coke strength; contrast and analyse the experiment result; illustrate coke strength affected by different sample points.
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