查询词典 sample rate

The main work of this thesis is simulation study on the basis of large sample properties for two estimates by Monte Carlo method with some models. We consider the problem of the choice of window width, consistent rate and some doubtful points about consistent rate with fixed sample size.

本文的主要工作是依据大样本性质，对特定模型的这两种估计用Monte Carlo方法进行了模拟试验，讨论了长度有限的样本情况下窗宽的选择问题，比较了两种估计的拟合程度，相合速度并提出了对相合速度的一些疑难点。

Based on maximum likelihood estimate, the estimate method of sieving rate of connectivity sieve was presented. Three key issues in the estimate were analyzed:calculation of sample size,generation of random sample, and recognition of connectivity of induced subgraph. By preassigned credibility and precision, effective estimate of sieving rate of connectivity sieve is achieved.

目前，产品拆卸过程规划基本上是建立在图的基础上，即首先根据产品拆卸回收或拆卸维修信息，选用一种适合的图模型进行描述，然后在图模型的基础上，以拆卸回收或拆卸维修的经济性、环境协调性和技术性等综合指标最优为目标，进行拆卸过程规划，最终得到产品的最优拆卸序列【1一。1连通性筛子拆卸与或图是拆卸模型中的一种，文献[7]给出了拆卸与或图的定义及建模过程。

In this study, we use a sample of 186 firms in Taiwan that have export ratio for at least 10 percent in the sample period to examine their exchange rate exposures and the effect of usage of currency derivatives on currency exposures. In the determinants of exchange rate exposure, we find that exchange rate exposure is positively related to the foreign sales ratio, firm size and quick ratio.

过去相关外汇暴露的文献，主要在讨论国际企业的外汇暴露的大小与其决定因子，受限於企业使用衍生性金融商品交易资料取得不易，过去的模型中通常仅以虚拟变数的方式，来分析公司使用衍生性金融商品避险的影响，而未进一步分析其使用程度对外汇暴露的影响。

With the sample of the newest financial data of the company issued by the ST in 2006-2007, and the sample of the normal company at the same time, the study takes example for the financial data released by the listed companies and selects the ROE（Rate of Return on Common Stockholders'Equity ）, the sales net profit rate and the current ratio of three financial targets, which are discriminated and analysed with univariate method.

摘 要：本文以我国上市公司为研究对象，通过对上市公司财务危机的定义、财务危机与企业失败的关系、以及财务危机预警的研究，以2006-2007年上市公司最新一次被ST发布的财务数据为估计样本，以同期的正常公司为配对样本，选取净资产收益率、销售净利率和流动比率三个财务指标，运用单变量方法进行判别分析。

The comparison error rate of LSD and Duncan is equal toα, but their experimental error rate is large toα. The comparison error rate of SNK, Scheffe, Bonferroni, Sidak are smeller toα, as well as experimental error rate. The power of test of SNK, Scheffe, Bonferroni, Sidak are smeller to LSD and Duncans. When unbalance design with small sample size, the power of SNK, Scheffe, Bonferroni, Sidak are little small.

LSD检验、Duncan检验的比较错误率接近检验水准，但二者的实验错误率远远大于检验水准；SNK检验、Scheffe检验、Bonferroni检验、Sidak检验的比较错误率和实验错误率均小于检验水准，但这三种方法对均数的敏感度不及LSD检验和Duncan检验；正态分布方差齐各组不均衡且为小样本时，Scheffe检验、Sidak检验、Bonferroni检验的β_2，值均较大。

The matrix effect was corrected by theoretical a influence coefficient method. Moreover, flux dilution rate and fusion time were discussed. The mass ratio of sample to flux was chosen as 1 to 15. The fusion time of sample closen was 15 min. The concentration of the sample in the flux was proved to be suitable for the XRF determination of both components of macro and micro amount.

对稀释比、熔样时间等进行了探讨，结果表明，试样和熔剂的质量比以1：15、熔样时间以15 min为好，所得试样在熔剂中的分散度适当，可同时适合试样中高、低含量组分的测定。

The oxide formed on NbSi2 at 1023 K consists of Nb2O5 and minor SiO2. The Nb2O5 is lose and nonprotective, which spalls from the sample during oxidation. The oxidation kinetics of all the NbSi2 samples at 1023 K follows a linear law. The oxidation rate is intrinsically determined by the reaction rate between the matrix and the oxygen in air, which in turn is determined by the exposure area of the sample.

无论是单晶还是多晶样品，氧化产物均为 Nb2O5和SiO2，生成的Nb2O5易剥落，样品的氧化动力学曲线均呈直线规律，证明NbSi2的氧化过程是一种本征无保护条件下氧元素与基体元素直接反应的过程。

objective to investigate the infection of mycoplasma pneumoniae in children.methods the glutin agglutination rection was used, the diluting power of antibody of mycoplasma pneumoniae was more then 1:80, it was a positive sample.results 1 817 patients were detected, the positive rate was 30.7%,the female rate was higher than male rate, the highest rate were between three to six years old.conclusion mycoplasma pneumoniae is the main pathogen in children with respiratory tract infection, the positive rate was connected with age and nearly contact each other.

目的 了解肺炎支原体在青少年中的感染情况。方法采用明胶凝集的方法，若抗mp-igm滴度≥1：80，为阳性。结果共检测1817例，阳性率为30.7%，女性阳性高于男性，3～6岁的儿童阳性率最高。结论肺炎支原体的感染是青少年呼吸道感染的重要病原菌，阳性率与年龄有关，密切接触可引起局部流行。

The analytical parameters including pH value, sample volume, flow rate of sample solution and elution conditions (concentration, volume and flow rate of eluant) were investigated. The effect of foreign ions and the adsorption capacity of the modified peanut shell were examined.

考察了样品pH值、进样体积、流速、洗脱剂浓度、体积、流速等参数的影响，同时研究了共存离子的影响，评价了萃取材料的吸附容量及再生性能。

It has streptomycin and dihydrostreptomycin crossing rate of 100 %, simple sample pre-treatment including water dilution of milk sample and extraction with buffering phosphoric acid solution and pH regulation of pork and kidney sample, fast detection, high detection sensitivity up to 11.2 microgram/L and other advantages, and may be used in detection of residual streptomycin and similar medicines in animal food products.

本发明的检测链霉素药物的酶联免疫试剂盒为多残留检测试剂盒，链霉素和双氢链霉素的交叉率为100％；对样品的前处理要求低，样品前处理过程简单，牛奶样品用水稀释后可直接测定，猪肉和肾脏经磷酸缓冲液抽提后调pH即可上样，并且能同时快速检测大批样品；测定方法简单，省时，牛奶样品在1小时之内可得出测定结果；最低检测限达11.2μg/L，具有高特异性、高灵敏度、高精确度、高准确度等特点，可在动物性食品链霉素药物残留检测中发挥重要作用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。