查询词典 hf

In order to overcome the shortcomings of the monopole antennas, a methods of quasi-fractal is used, which decrease the resonant frequency.

为此，对HF频段的单极子天线进行准分形，有效地降低了天线的谐振频率。

We can obtain ordered morph of the surface of porous silicon by control the parameter of the experiment.

通过对实验参数（如HF浓度与氧化反应的时间）的控制，可以得到形状规整的多孔硅，为以后的组装打下基础。

By the Test, we find out the better technological conditions, the results show that the secondary magnetic-spiral and spiral -magnetic are the better flowsheet for the pyrite cinders. Under the action of muriatic acid and hydrofluoric acid, the content of sulphur, silicon, lead, copper are descend to 0.21%, 8.26%, 0.053%, 0.023%. A total iron concentrate containing 62.34% Fe is obtained with recovery of 78.08% Fe.

通过试验，得到较优的工艺条件，结果表明，两段磁选—螺旋溜槽是较适合于该种硫铁矿烧渣的工艺流程；再经HCl、HF等酸浸脱杂降硫除铅，获得品位为62.34％，回收率为78.08％的铁精矿产品，S、SiO_2、Pb、Cu的含量分别降为0.21％、8.26％、0.053％、0.023％。

And the expression Fas protein of myocyte were in left ventricular, right ventricular and left atria with HF group.

Fas蛋白的表达仅出现在左室、右室和左房的心衰组。

Silicon dioxide ; inductively coupled plasma atomic emission spectrometry ; fluorite ; nebulizer and torch resistant to hydrofluoric acid

二氧化硅；电感耦合等离子体原子发射光谱法；萤石；耐HF腐蚀的ICP雾化器和矩管系统

The use of nitric acid and/or HF is preferred for preparation of samples for Ag analysis.

硝酸和氟化氢的使用在Ag分析样品的制备时涉及到。

Then, the scale of the point charge used to simulate the environment effect was determined using ab initio HF method.

通过量子化学计算，确定了模拟环境效应的点电荷规模的大小。

The gabbro-diorites have high light rare earth elements, low heavy rare earth elements and weakly positive Eu anomalies in chondrite-normalized rare earth element curves, and with high LILEs and relative low HFSEs in primitive mantle-normalized trace element spider diagram.

稀土元素球粒陨石标准化曲线显示其具有富含轻稀土元素、贫重稀土元素以及微弱的Eu的正或负异常的特点。微量元素原始地慢标准化蛛网图上，岩体具富含大离子亲石元素，明显亏损高场强元素（Nb、Ta、Zr、Hf和Ti）等特点。

Uniting the PUDU with the HF partial discharge monitoring system fortransformer, we can get a practical combine monitoring system.

将特高频检测单元和变压器局部放电高频监测系统组合在一起，构建了联合监测系统。

The expatiation of the control function in this article is divided into two sections: the manufacturing execution system and the basic automatic control. The former was focused on the quality assurance system of pipe welding and the quick-setting system,and the later focused on the control functions,such as the roll gap position control, the tracking of cross-welding line between coils,the sequence control, the speed control over the main driver, edge miller, cut-off machine, HF welder and the heat treatment of weld seams.

分制造执行级MES 和基础自动化级两部分阐述控制功能，MES方面着重介绍快速设定系统和焊接质量保证系统；基础自动化部分重点介绍辊缝位置直控制、钢卷对接焊缝跟踪、顺序控制、主传动速度控制及铣边机、飞锯、高频焊机、焊缝热处理等单体设备的控制功能。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！