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The donor impurity and grain boundary combustion-supporting agent containing acceptor impurity were added successively in the ceramic powder during ceramic powder preparation, both of them can also promote grain growing and semiconductive, and the combustion-supporting agent can be good to form insulation layer in oxidizing process.

采用一次性烧成技术研制了晶界层半导体陶瓷电容器,在瓷料配制过程中先后加入施主杂质和含有受主杂质的晶界助烧剂,两者在还原烧成时促使晶粒生长并半导化,助烧剂在氧化时有利于晶界绝缘层形成。

The study applies basic theory of "dynamic diagenesis" into diagenesis researches was preceding.

成岩动力学研究是储层成岩作用研究的前缘课题。

That is, the objective distance can be changed freely while keeping the image distance constant and vice versa.

并给出了多层光子晶体平板的成像结果,实现了正方形三角形混合晶格光子晶体平板近远场成像。

A method of velocity tomographic inversion based on Fermat principle is presented by using travel times of transmitted waves from one borehole to another.

利用井间透射波旅行时,给出了一种以费马原理为基础的井间地震弯曲射线速度层析成象方法,数值计算表明了该方法比直射线法反演成象精度高。

Transfers the bottom type resistance furnace structure outer covering becomes by the steel plate and the section welding, the furnace body welds the system full circle densely by the steel plate, lower part the spatial installment has the turntable support, the kingbolt, on the furnace body foot ledgerwall the installment has the velocity modulation electrical machinery and the transmission gearbox, through the umbrella type gear and the main axle connection, transfers the bottom type resistance furnace's stove village material to use fan-shaped ultra light quality high strength 0.6g/cm3 to conserveenergy the fireproof heat preservation brick, the heat insulating layer uses the aluminum silicate textile fiber felt and the inflation heat preservation powder, the resistance silk thread becomes spiral-shaped, installs according to the average temperature rule in the resistance wire trough, the basealso arranges the resistance wire in the special-purpose trough, in such stove the temperature is even, the work piece and the turntable cannot bump with the resistance wire, resistance wireThe service life is long, is not easy to damage.

转底式电阻炉结构外壳由钢板和型钢焊接而成,炉体由钢板密焊制成圆型,下部空间安装有转盘支撑,旋转主轴,炉体最下部底板上安装有调速电机和变速器,通过伞型齿轮与主轴连接,转底式电阻炉的炉村材料采用扇形超轻质高强度0.6g/cm3节能耐火保温砖,保温层采用硅酸铝纤维毡和膨胀保温粉,电阻丝线成螺旋状,按均温规律安装在电阻丝槽内,底部也布置电阻丝在专用槽内,这样炉内温度均匀,工件及转盘不会与电阻丝相碰,电阻丝使用寿命长,不易损坏。

Ltd adopted the horizontal drilling technology to drill two horizontal ly-communicated remedy wells with large caverns in Weixi thinly-bedded rock salt deposit,which has opened up a precedent in the application of horizontal well d rilling technology in thinly-bedded rock salt mine in our country.

四川久大制盐有限公司长山盐矿,首次应用水平钻井技术,在威西单薄层岩盐矿体上,钻成两眼大溶腔外水平连通补救井,开创了国内单薄层岩盐矿山水平井技术应用之先河,多项技术、经济指标超过了其它类型岩盐矿山水平对接井,取得了良好的经济效益和社会效益。

Materials and Methods: Spiral CT scan of the middle ear was performed with 1.0mm slice thickness at pitch 1.0, bone algorithm, and 0.1~0.2mm reconstruction interval in 20 normal subjects(40 ears).

材料和方法:20例无中耳疾病者采用层厚1.0mm、螺距1.0轴位薄层扫描,骨算法、0.1mm~0.2mm间隔重建,分别做CTVE成像、表面和骨最大密度投影3D重建,观察和比较CTVE和3D显示正常听骨链的能力。

Bleaching and characterization were morphologically apparent, but not well developed as to be defined as bleached or claying horizons....

三个土壤剖面均有一定的漂洗和淀积粘化现象,但都不足以定义成漂白层或粘盘层。

The Company was founded in 1989 and has 10 years of production experience, is now owns more than 10,000 square meters factory, with a four-storey main building, a five-storey living quarters, a warehouse and a wire plant.

本公司成立于1989年,已有10多年的生产经验,现已拥有1万多平方米厂区,有一栋四层主厂房,一栋五层宿舍区,一座仓库和一座线材厂。

Presence of multiples leads to poor quality in main stages of offshore seismic data processing, such as velocity analysis, stacking and imaging. Three basic multiple attenuating methods are reviewed; and a more effective multiple attenuator is achieved by joining them. As the first step, shot or receiver records are extrapolated by wave-equation datum algorithms. The extrapolation will establish a model of waterbottom multiples. Waterbotton multiples will then be removed by subtracting the extrapolated records from the original records. After that, predictive deconvolution is used to attenuate the multiples created by source ghost. Finaly, RADON transformation is adopted to separate peg-leg multiples and residual water-bottom multiples from the original data in the τ-p domain.

地震勘探尤其是海上地震勘探中存在着各类多次波,由于多次波的存在严重影响了速度分析、叠加、偏移成像等地震资料处理,海上多次波主要有全程多次波和层间多次两大类,为了压制海上不同类型的多次波,本文首先分析波场外推、预测反褶积和拉东变换衰减不同多次波的理论基础,然后联合采用这些方法,分别衰减全程多次波和层间多次波;即:首先对炮记录或者接收点记录进行波场外推,建立海底多次波模型,预测并减去全程多次波,然后利用预测反褶积衰减掉周期性明显的多次波,最后将数据转换到τ-p 域,用拉冬变换根据同一时间多次波和有效波在速度等方面的差异,进一步分离层间多次波和剩余的全程多次波,并在该域中切除分离出的多次波,从而实现联合多次波衰减处理。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。