查询词典 propagation

Final, the number of the sources is estimated with multistage clutstering techniques and the corresponding sources are extracted. The proposed algorithm can avoid suffering the error propagation of the deflation technique, which exists in all sequential algorithms.4. A new post-processing method for convolutive mixtures blind speech separation is proposed.

针对现有卷积混合盲源分离的频域算法存在的问题，即恢复出的信号是源信号和一个未知的滤波器的卷积，且由于部分频率点处盲源分离方法的失效和无法精确解决排列和尺度模糊问题，分离出的信号中会泄露进其余的信号分量，影响分离性能。

In order to accelerate propagation of Corylus heterophylla, status and trends in study of layering, cutting, grafting and tissue culture were reviewed, problems existed in related research were analyzed and future direction of development was also pointed out.

为了加快榛子苗木繁殖的速度，综述了有关榛子压条、扦插、嫁接和组织培养等方面研究的现状与趋势，分析了相关研究中存在的问题，并指出了其发展方向。

It can provide references for counteracting fatigue design and crack propagation management of container cranes' structure.

对岸边集装箱起重机结构的抗疲劳设计及裂纹管理具有一定的参考价值。

Based on the discovery, a preliminary model of reproductive modes was proposed, which can direct the breeding and propagation of silver crucian carp.

由此提出了银鲫两种生殖方式的基本模式图，该图为指导银鲫的育种和育苗实践提供了新的思路。

The research aimed to provide foundationfor the rapid propagation of superior variety and the selection of resistant variety of Cucurbita.

为南瓜属植物优良品种的快速繁育、抗逆性品种的选育等提供研究基础。

The research aimed to provide foundation for the rapid propagation of superior satiety and the selection of resistant of resistant variety of Cucurbita.

［目的］为南瓜属植物优良品种的快速繁育、抗逆性品种的选育等提供研究基础。

The design of transplanter for rice growing in cupulate tray is the critical link in rice growing in cupulate tray technology,the design method is not mature,for exploring a new design method,having discussed neural network s serviceability in agriculture machinery mechanism design with the theoretical basis of self-organizing feature mapand the back-propagation network,the integrated SOM-BP nerve network model is applied in the field of transplanter s critical mechanism design for rice growing,al...

水稻钵育栽植机的设计是实现水稻钵育栽培技术的关键环节，区别于传统的水稻栽植机其关键部件的设计方法还不成熟，在理论研究方面还不完善。为探索新的设计方法，论述了神经网络算法对农业机械设计的适用性，以自组织特征映射网络SOM 和误差反向传播网络BP为理论基础，将SOM-BP集成神经网络模型应用于水稻钵育栽植机关键部件设计领域，建立神经网络模型，通过集成网络训练，得到设计结果。验证了SOM-BP神经网络在农业机械机设计中的正确性和精确性。

On the other hand, in catalytic oxidation the cyclohexyl hydroperoxide decomposed rather quickly, and then accelerated the reaction.And during the reaction, the concentration of cyclohexyl hydroperoxide kept very low and the chain propagation became the rate limiting step.

而在催化剂存在的情况下，环己基过氧化氢分解非常迅速，环己基过氧化氢浓度在整个反应过程中稳定在一个很低的水平，反应由氧化生成酮的链传递反应过程控制。

Applying stem as explants, high frequency propagation of seedlings can be achieved with plant tissue culture in Cynanchum auriculatum.

结论］采用白首乌的茎段作为外植体，利用组织培养的方法能实现种苗的快速工厂化。

This paper investigated the true propagation paths of acoustic wave in two-dimensional temperature gradient field-single peaked symmetry and deflective respectively, using the two- dimensional acoustic ray tracing method of forward deploying triangle. Besides, a simulating calculation and analysis of this acoustic ray tracing algorithm in model temperature was given.

该文使用二维空间中的三角形前向展开方法，对二维温度梯度场中的声线轨迹进行追踪，并分别在具体的单峰对称温度场和单峰偏斜温度场模型中，对该声线追踪算法进行了仿真计算和分析。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。