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On blocking rules for the bootstrap with dependent data 总被引:9,自引:0,他引:9
We address the issue of optimal block choice in applicationsof the block bootstrap to dependent data. It is shown that optimalblock size depends significantly on context, being equal ton1/3, n1/4 and n1/5 in the cases of variance or bias estimation,estimation of a onesided distribution function, and estimationof a two-sided distribution function, respectively. A clearintuitive explanation of this phenomenon is given, togetherwith outlines of theoretical arguments in specific cases. Itis shown that these orders of magnitude of block sizes can beused to produce a simple, practical rule for selecting blocksize empirically. That technique is explored numerically. 相似文献
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背部烫伤大鼠脑及肝脏热休克蛋白70(hsp70)mRNA的诱导 总被引:4,自引:1,他引:3
本文首先用α-^32P标记的热休克蛋白70(hsp70)cDNA为探针,研究了背部烫伤对大鼠脑肝hsp70mRNA的诱导。结果表明,烫伤大鼠脑肝hsp70mRNA的表达明显增加,烫伤后5min内开始出现,24h后恢复正常。由于烫伤后脑肝温度的增加不超过1℃。因此温度升高不大可能是该基因表达增加的原因。在此基础上用hsp70的抗体,采用Western blot的方法,分析了烫伤大鼠脑肝hsp70的变 相似文献
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