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Based on all the researches available, this paper simulates a more general ARIMA(0,1,q) process and analyzes the influence of lag length selection criterions to the size and power of the ADF test with different data generating processes, ADF regressions, and sample sizes. Finally, it is proved that the Modified Information Criteria always shows a more proper size and the General to Special Criteria has more robust properties in ADF test.

本文在已有研究的基础上,模拟了更为般的ARIMA(0,1,q)过程,分析了在不同的数据生成过程、检验式以及样本容量下,各种滞后长度选择方法对ADF检验功效和实际检验水平的影响,最后以为修正的信息准则通常具有较合理的实际检验水平,而从般到特殊法具有更为稳健的ADF检验性质。

I am conscious of that the external manufacture companies adjust the exhibition gathering and value very much to the Western Europe row present profoundly , and produce technique content is tall , and steading dependablely , technology is well-developed , and ornament is powerful .

这次西欧行,我们深深地感到竞争之激烈,挑战之严峻,我们要与世界产品水平同步还有很大差距,怎样变压力为动力,不断提高工艺水平,以先进的设备提高生产力,怎样在世界金融危机加剧蔓延的情况下坚定信心,渡过难关,是这次西欧行一路思考最多的问题。

Methods The circulating testosterone level of BPH patients and rats was decreased by administration of medroxyprogesterone and stilbestrol as well as castration. Using RNA dot blot hybridization technic, we detected the Bcl-2mRNA expression in human BPH tissue and rat prostate under different level of androgen.

分别通过服用药物和切除睾丸改变BPH患者和大鼠机体雄激素水平,采用mRNA斑点杂交技术,检测不同雄激素水平下的人BPH组织和大鼠前列腺组织Bcl-2 mRNA的表达情况。

Without increase of equipment, the technical operation and management level can be improved, through factory integrated information and advanced supervisal technology.

该系统在不增加设备投资的条件下,通过工厂信息集成处理和先进的监控技术,提高生产装置的工艺操作水平和管理水平为目的。

Results:Plaque index and probing depth in one year after rehabilitation were lower than those in base line. The proportion of spirochetes in subgingival plaque was low (0.21%~ 2.43%) and in the normal level.The mean bone loss was 0.29 mm.None of the implants showed suppuration or mobility.

结果:修复后1年时菌斑指数(plaque index,PLI、探诊深度(probing depth,PD)明显低于基线水平,龈下菌斑中螺旋体比例(propotion of spirochetes,S%)很小(0.21%~2.43%),总体上处于健康水平,平均骨丧失0.29mm,所有种植体无松动、溢浓。

To achieve the end of analysis, this paper has carried out continuous follow-up investigation of the Chinese studying of these foreign students, adopts the approach of listening, noting and contrasting of the reading and tape-recording in the different phases of studying, and follows the guidance of the second language acquisition and teaching theory.

通过对两国留学生的跟踪调查和不同学习阶段朗读、录音,采用听音、记录、对比的方法,在第二语言习得和教学理论的指导下,分析了以不同汉语水平日本留学生为主体受试者,中高级汉语水平美国留学生为参照的声调偏误形式、"化石化"大致内容和时期、习得顺序和过程。

The above method can be used as a general method of determining molecular weight distribution of polymers.4.Solid-state ~1H wide-line NMR and ~(31)p magic angle spinningNMR were applied to a series of PEI/DNA complex samples with different PEI molecular weights and nitrogen/phosphatemolar ratios,in order to disclose the influence of various structural factors on the interactions and morphology.The results of ~1H NMR spectra showed that the linewidth of the PEI signal was greatly broadened with increasing the N/P ratio.Meanwhile,in the ~(31)p M_AS experiment,the signal was found to shift upfield with the increase of the N/P ratio.Both ~1H and ~(31)P NMR experiments demonstrated that the interaction between two constituents and subsequently the morphology of the complexes vary with the N/P ratio.

首次将固体核磁共振应用到聚合物/DNA复合物体系,观察复合物体系中不同N/P比对其相互作用和相结构的影响,研究表明N/P比的变化对聚乙烯亚胺/DNA基因递送体系分子水平上相互作用有着很大的影响;另外,还发现不同分子量的聚乙烯亚胺聚合物载体在N/P比为3的情况下对复合物中DNA的微观尺度没有明显影响;通过氢的自旋扩散实验,首次测得在PEI/DNA复合物体系中DNA相尺寸的大小,并发现在体系中N/P比达到3以上的复合物中DNA和PEI达到了分子水平上的相容。

Based on reviewing the banking reform experience of Eastern European countries, we propose seven propositions on China's banking sector reform and empirically vitrify seven propositions using data from 21 banks between 1999 and 2006 ,then draw final conclusions: foreign banks entry lower the profit rate of hosting country banking industry in short-term, improve host country banking's risk management skills

本文在综述东欧国家银行业改革经验的基础上提出中国银行业改革的七个命题,并用中国24家银行1999-2006年间的数据构建模型进行检验,最后得出结论:短期内外资银行进入导致东道国银行业利润水平下降、风险管理水平上升,在中国的背景下可以认定这是外资银行积极作用开始发挥;外资银行机构数量的增加和持股比重的上升都能刺激中国银行业效率的改进,但是外资银行持股比重的影响更具普遍性;不同类型银行对外资银行进入的反应存在差异,国有商业银行反应比较迟钝而股份制和城市商业银行反应比较迅速。

Tree shrew, which was the representative tropic and sub-tropic small mammal distributed in the south of china, was studied on cold adaptative characters of individual and molecule levels during the press of low temperature as the experimental animal in our research.

本论文以分布于我国南方的典型热带、亚热带小型哺乳动物,中缅树鼩,为研究对象,从个体水平及分子水平对低温胁迫下的冷适应特征进行了研究。

By incorporating all these seeting on the aswirl board with the optimal gantry angle, the patient will final accumulate compensated dosages on whole body surface.

结论与讨论:结果显示以在等中心旋转点处照野为40cm×40cm,当加速器的机头水平往上及水平往下各155。

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推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?