查询词典 replacement rate

Species richness and Pielou evenness index were used to measure species diversity. Species richness in polluted area was 32-67, while in control area it was 47-82. Pielou evenness index of tree layer was 0.1161-0.8509, while those of shrub layer and herb layer were 0.1763-0.3249 and 0.0443-0.2601, respectively. The results showed that both species richness and Pielou evenness index were influenced by the point source pollution. Species importance values showed significant differences between polluted area and control area. Dominance of different species had changed, and some species even disappeared under the pressure of pollution, indicating a process of species replacement in plant communities. Such species replacement can provide a scientific basis for species selection for restoration of human-damaged ecosystem. The natural regeneration of Quercus variabilis was insensitive to pollution, while Cupressus funebris was effected seriously.

仅在污染区中出现的物种数量远低于仅在对照区中出现的物种数量；(2)可分出4种基本的群落类型：马尾松林、柏木林、栓皮栎林和马尾松＋栓皮栎林，各群落特定层次的物种丰富度指数以及Pielou均匀度指数在污染区与对照区之间存在显著差异；(3)污染胁迫下，物种在群落中的生态优势度发生了变化，反映了群落中不同物种相互替代的过程，这种物种的替代可为今后受损生态系统人为恢复过程中物种的筛选提供一定的理论参考；(4)对群落中王要物种更新的调查发现：栓皮栎林对污染不敏感；柏木林污染区与对照区幼苗数量及分布格局均有明显差异，污染条件下群落未来演替受到严重干扰。

Summary of Background Data. Multisegmental disc replacement procedures belong to the so-called "off- label" indications for disc replacement, which still lack evidence ofnoninferiority when compared with fusion procedures.

背景。多节段的腰椎人工椎间盘置换手术属于所谓的&无标签&的椎间盘置换指征，目前依然缺乏明显的优势，和腰椎融合技术相比。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran. Then, at the basis of Rao and Bayless's study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran.Then, at the basis of Rao and Baylesss study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

Ini replacement to xml format - Microsoft has been trying to get developers to move away from INI files for quite some time, pithily suggesting using the Registry instead... despite the fact that it's rarely a suitable replacement.

Microsoft 一定会让开发人员在某个时候不能使用INI文件，建议使用注册表取代，虽然现在还不有一个合适的取代产品。

β-（3,5-Diterbutyl-4-hydroxyphenyl） propionyl chloride is synthesized with 3,5-methyl propionate as raw material via hydrolytic reaction and replacement reaction,and the replacement reaction conditions were explored.

摘 要：以β-（3，5-二叔丁基-4-羟基苯基）丙酸甲酯为原料，通过水解反应和酰氯合成反应合成了抗氧剂中间体β-（3，5-二叔丁基-4-羟基苯基）丙酰氯。

This means that Matthias as a replacement apostle, is a person, the name Matthias is not important, rather what is more important is that the "replacement" is a person' meaning that "Matthias" could be anybody, yes anybody whom the Lord anoints, to take the place of the missing 12th apostle.

这意味着，马蒂亚斯替代使徒，是一个人的名字马蒂亚斯并不重要，而更重要的是，该&替代&是一个人'的含义是&马蒂亚斯&可能是任何人，任何人是上帝anoints ，以取代失踪12使徒。

objective to introduce a novel suturing method in valve replacement.methods 20 valvular replacement patients were included in the study.

作者单位：南方医科大学附属南方医院心胸外科，广东广州510515 目的介绍一种心脏瓣膜手术的逆行缝合方法。

Through the construction of abutment replacement in Shangzhi Highway and Railway Cross-bridge, a comprehensive introduction of basic principle about abutment replacement technology by the bridge deck steel method was given and the construction technology and social benefits were analyzed in the paper.

通过尚志公铁立交桥支座更换施工，全面介绍桥面钢梁法更换支座的基本原理，并对该种技术的施工工艺、社会经济效益进行分析。

As I know, there is no top age limitation on the Total Hip Replacement. I heard a 14 years old dog went through hip replacement before.

就我所知，人工髋关节置换手术并无年龄限制，我还听过有只14岁的狗狗动这种手术。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48