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缩宫素对123例本地成年母鸡产蛋滞留难产症的临床治疗观察,其结果:缩宫素组与对照1、2组的治愈率比较,均具有极显著性差异(P<0.01)。 相似文献
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东人达 《渝西学院学报(社会科学版)》2005,4(1):17-19
重庆市秀山民歌《黄杨扁担》多年来广为流传。歌词中的"下柳州",经过笔者的各方面考证,实际应该是"下酉州",这首民歌则产生于民国以前。秀山、酉阳都是少数民族聚居区,两地应该求同存异,携手开发传统民族文化资源。 相似文献
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This paper reports estimates for the ex ante tradeoffs for three specific homeland security policies that all address a terrorist attack on commercial aircraft with shoulder
mounted missiles. Our analysis focuses on the willingness to pay for anti-missile laser jamming countermeasures mounted on
commercial aircraft compared with two other policies as well as the prospect of remaining with the status quo. Our findings
are based a stated preference conjoint survey conducted in 2006 and administered to a sample from Knowledge Networks’ national
internet panel. The estimates range from $100 to $220 annually per household. Von Winterfeldt and O’Sullivan’s (2006) analysis
of the same laser jamming plan suggests that the countermeasures would be preferred if economic losses are above $74 billion,
the probability of attack is larger than 0.37 in 10 years, and if the cost of the measures is less than about $14 billion.
Our results imply that, using the most conservative of our estimates, a program with a cost consistent with their thresholds
would yield significant aggregate net benefits.
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V. Kerry SmithEmail: |
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The classical histogram method has already been applied in line transect sampling to estimate the parameter f(0), which in turns is used to estimate the population abundance D or the population size N. It is well know that the bias convergence rate for histogram estimator of f(0) is o(h2) as h → 0, under the shoulder condition assumption. If the shoulder condition is not true, then the bias convergence rate is only o(h). This paper proposed two new estimators for f(0), which can be considered as modifications of the classical histogram estimator. The first estimator is derived when the shoulder condition is assumed to be valid and it reduces the bias convergence rate from o(h2) to o(h3). The other one is constructed without using the shoulder condition assumption and it reduces the bias convergence rate from o(h) to o(h2). The asymptotic properties of the proposed estimators are derived and formulas for bin width are also given. The finite properties based on a real data set and an extensive simulation study demonstrated the potential practical use of the proposed estimators. 相似文献
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《Women and birth : journal of the Australian College of Midwives》2023,36(1):e17-e24
BackgroundDocumentation and assessment of progress in labour using a partograph is recommended by the World Health Organisation to assist in the timely recognition of labour dystocia. Recent studies have tested new designs of partographs that aim to account for more variable rates of labour progress. However, other studies have suggested that poor compliance in the completion of partographs affects utility. The objective of this study was to compare two types of partographs for compliance in documentation and use for managing labour.MethodsLow-risk nulliparous women in spontaneous labour (n = 228) were randomised to either an Action Line (control) (n = 114) or Dystocia Line partograph (intervention) (n = 114). Primary outcome was compliance with instructions for commencement of the partograph following a multifaceted training strategy. Secondary outcomes included compliance with the accompanying clinical management protocol for each partograph; and labour and birth outcomes.ResultsThe compliance rate for commencing the Action line partograph was 43.2% compared to 67.0% (p = 0.02) for the Dystocia line partograph. Other than a reduction in artificial rupture of membranes in the Dystocia Line group there were no other differences in labour management or birth outcomes. The use of centralised electronic display of labour progress may be a contributing factor.ConclusionsCompliance with the commencement and use of either partograph was low. There was little indication that the partograph was being utilized in the assessment and management of prolonged labour. Further studies are needed to explore the current utility of partographs in labour management and the effect of centralised monitoring of progress in high resource settings 相似文献
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