查询词典 high frequency

The high frequency plant regeneration system of Medicago truncatula with cotyledonary-node explants was developed through direct shoot organogenesis.

通过直接的芽器官发生途径，建立了蒺藜苜蓿Medicago truncatula子叶节外植体的高频植株再生体系。

We show that the melanistic K locus mutation in North American wolves derives from past hybridization with domestic dogs, has risen to high frequency in forested habitats, and exhibits a molecular signature of positive selection.

此研究报告的另一作者安德森表示，数千年以来，人类就已经培育出了黑色皮毛的家用狗。她说：&不过，如今，我们不仅看到野狗也有黑色皮毛，还发现黑色皮毛对狗非常有利。&

Based on the previous research on the deposition of amorphous/microcrystalline silicon tandem solar cells, silane concentration for the deposition of microcrystalline bottom cell was selected to further optimize the performance for micromorph tandem solar cells using very high frequency technique. Finally, micromorph silicon tandem solar cell with 11.02%(Area=1.0cm2) initial conversion efficiency has been fabricated at a certain silane concentration and suitable light trapping structure.

采用甚高频等离子体增强化学气相沉积技术，在前期我们单室沉积的微晶硅薄膜太阳电池和非晶硅/微晶硅叠层太阳电池研究的基础上，通过对微晶硅底电池本征层硅烷浓度的优化，获得了初始效率达到11.02%（电池面积1.0cm2）的非晶硅/微晶硅叠层太阳电池。

Pin/pin "micromorph" tandem solar cell s were deposited by very high frequency plasma enhanced chemical vapor deposition.

采用超高频等离子增强化学气相沉积技术，逐次高速沉积非晶硅顶电池及微晶硅底电池，形成pin/pin型非晶硅/微晶硅叠层电池。

Microseismic events are characterized by high frequency,short duration,and weak energy.They may even be smeared by random noises.

由于微地震事件的频率高，持续时间短，能量小，随机噪声甚至可以淹没有用的微地震信号。

For the current misdistribution caused by contiguity effect between the exciting windings not being taken into account in traditional mathematical model, the bigger calculation error of harmonic voltages is brought out when the high frequency alternating current flows in the exciting windings.

传统的数学模型未考虑激磁绕组邻近效应引起的电流分布不均对输出电势的影响，从而会在高频下带来较大的谐波电势计算误差。

The results showed that the three kinds of prealloy powder have excellent low temperature sintering characteristics and good wear resistance. They have excellent physical and mechanical characteristics close to ultrafine cobalt and imported prealloy powder, good retention to diamond and excellent bonding momental for high frequency brazing. At one time, they have lower cost and reduced dosage.

结果表明：三种预合金粉末有着优良的低温烧结性能和耐磨性，表现出接近于超细钴和相当于国外代钴粉末的优良的物理、机械性能，对金刚石把持力高；具有高的高频钎焊结合力矩；粉末成本较低，用粉量可降低。

In this article, three kinds of prealloy powder were developed by water atomization method. The base attribute, pattern, phase composition, differential thermal analysis of powder were researched. Sintered density, hardness, bend strength, Young's modulus were researched as hot pressed sintering temperature changing. By using abrasive wearing equipment upbuilt by the authors, the wear resistance were determined. Green-pressing density, simulated green-pressing strength and bonding momental of high frequency brazing were assayed. SEM corrosion structure and SEM appearance of fracture were observed.

本文采用水雾化法开发了三种预合金代钴粉末：对粉末的基本属性、形貌，粉末的相组成，粉末的差热性进行了分析研究；测定了它们的烧结密度、硬度、抗弯强度、弹性模量随热压烧结温度变化的规律；采用作者自行建立的磨料磨损试验方法，测定了它们的质量磨损百分率；测定了它们的冷压生坯密度、模拟生坯强度以及高频钎焊的结合力矩；观察了热压烧结SEM腐蚀组织和SEM断口形貌。

The stainless steel monobloc component worked reasonably well but the modular implant made of titanium was associated with early osteolysis and a high frequency of loosening.36 Even a small change in design can have a substantial effect on long-term outcome.

尽管不锈钢单极假体设计合理，但由钛制成的组合假体导致早期骨溶解以及较高的松动率。即使是很小的设计改变也可以对假体的长期疗效产生重大的影响。

Abstract］ Objective To explore the high frequency ultrasound in ossificans myositis.

摘要］ 目的探讨高频超声在骨化性肌炎诊断中的作用。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐