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To demonstrate experimentally the generation of velogenic NDV from a nonpathogenic waterfowl isolate, we passaged an avirulent goose isolate in chickens.

为了通过实验证明从水禽中分离的非致病型NDV可以转变为速发型病毒，我们通过在鸡体内传播鹅源性无毒力株，经气囊接种连续传代 9次，随后再在鸡脑内传代 5次。

The experimentally obtained Stribeck curve for different normal loads and materials are parameterized.

为后续的摩擦模型的建模和结构系统的动力特性分析提供必要的实验基础。

We developed new spectroscopic methods to create stable odorant gradients in which odor concentrations were experimentally measured.

结果，他们证实，果蝇幼虫的大脑不但能利用立体线索来定位气味，而且还能指导它们的化学趋性。

The aim of this study was to experimentally study the long-term effect of a Paleolithic diet on risk factors for these diseases in domestic pigs.

此项研究的目的是要通过实验研究的长期效应一个旧石器饮食对这些疾病的危险因素在国内猪。

The characteristics of parallel various image edge detection methods are analyzed experimentally. The advantages, disadvantages and the scope of these methods in application are also analyzed.

本文围绕基于灰度图像的边缘检测技术做了如下工作： 1、对经典的边缘检测方法及各种改进技术进行了归纳、总结，详细介绍了其数学机理，并通过实验对各种方法的特点进行了分析，指出了各种方法优点和不足，以及它们各自的适用范围。

The abrasive wear of metal of four flux-cored wire for repairing of pedrail engineering machine was studied experimentally on a ML-225 wet sand abrasive tester. The surface of abrasive wear specimen and its microstructure were investigated by scanning electron microscope after completion of wear test.

利用ML-225型湿砂橡胶轮式磨损试验机、扫描电镜对所开发的四种用于履带式工程机械行走机构堆焊修复用药芯焊丝的熔敷金属磨粒磨损性能进行了试验研究。

ABSTRACT A new method to determine Peltier heat of electrode reaction has been put forward experimentally and theoretically.

根据电化学调控浮选理论研究的需要，本文提出和改进了测定电极过程热效应及电极过程对固体表面润湿性影响的两类新的研究方法。

It is the first time thatthe interference phase angle is larger than 90°has been observed experimentally.

这是实验上首次发现干涉相位角大于90°的现象。

The microstructure and photoluminescence of this film is experimentally analyzed after high temperature annealing.

对薄膜退火后的微观结构和发光性能进行了试验分析。

In this paper,temperature effects on piezoelectric materials are investigated theoretically and experimentally at first.

该文首先从理论上分析了温度对于压电元件的影响，并加以实验验证，据此提出了一种基于数字滤波器的温度补偿法。

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。