再作
- 与 再作 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Bromothiophene was synthesize d from thiophene through bromination to give 2,3,5-tribromothiophene,then reduced by Zinc in acetic acid.
以噻吩为原料,先和溴素反应合成2,3,5-三溴噻吩,再以锌作还原剂在乙酸溶剂中反应得到3-溴噻吩,主要研究了第一步反应时的原料配比对反应的影响及第二步的反应时间对反应的影响,反应总收率达72.6%。
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Depositors cash for delivery to the shop operators, operators take deposits fill out the paper crafted Broussonetia paperifera fruits used on, and then returned to the depositor, and fixed fee.
存款人把现金交付给铺户,铺户把存款数额填写在用楮纸制作的纸卷上,再交还存款人,并收取一定保管费。
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Calcareousness lime and plant ash could control this disease applied only, the optimum applying method is mix potassium permanganate with calcareousness lime base on compost in different plant period in growing season..
石灰或草木灰塘施或对水浇施,腐熟农家肥和石灰或高锰酸钾配合使用对根肿病的发生均有较好的抑制作用;单施农家肥和高锰酸钾对根肿病控制效果不理想,用腐熟农家肥作底肥+1%石灰水播种后浇塘+1%石灰水三叶期浇根+1%石灰水六叶期再浇根的组合模式可以有效地控制对根肿病的发生与危害。
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These antennas can cover GSM900/DCS/PCS/UMTS operation. In the chapter 2, the antenna is designed based on the concept of monopole antenna. Furthermore, the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching. In addition, to raise distance between radiation plane and ground will avoid capacitative effect effectually. In the chapter 3, the antenna is designed based on the concept of planar inverted-F antenna. Furthermore, that the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching is similar to chapter 2. But there is a difference in them. We can choose the short position to change input impedance at this structure. In the chapter 4, the antenna is designed based on the concept of planar inverted-F antenna which takes coupled-fed. It will produce the first mode and high-order mode near the frequency, 900MHz. The feature of this type is to reduce the volume effectually. This antenna can not only cover GSM900/DCS/PCS/UMTS operation but maintain good radiation efficiency. Finally, we will compare three antennas, and develop procedure with industrial view, and propose the prospect of the GSM/GPRS antenna in PND, as a conclusion.
在第二章中,我们使用单极天线设计概念,使用双路径架构并於末端耦合来对天线阻抗做匹配,产生涵盖GSM900/DCS/PCS/UMTS四频操作频带,并提高与接地面的辐射高度,以避免电容效应,使天线具有良好的辐射特性;在第三章中,使用倒F形天线设计概念,使用双路径架构於末端耦合,并於辐射臂上采取适当接地点电感效应作输入阻抗匹配,达成涵盖GSM900/DCS/PCS/UMTS系统的四个操作频带;在第四章中,采用倒F形架构并使用耦合馈入方式,使得长辐射金属臂在低频900 MHz附近产生共振,产生低频基频模态及高阶模态,以达成宽频及频宽涵盖GSM900/DCS/PCS/UMTS频带操作,并有效缩减使用体积;最后,分别比较此三种架构的优缺点,再加以业界角度来思考,研发产品天线的流程及思考方向,以及天线应用於可携式导航装置中未来的展望作为本论文的总结。
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The hydration reaction catalyzed by the ion-exchange resin,was used to reduce the content of caryophyllene in the heavy turpentine and get the longifolene of high purity.
以离子交换树脂作催化剂,利用水合反应降低重质松节油中的石竹烯含量,再经过提纯获得高纯度的长叶烯。
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HMM is good at dealing with sequential inputs,while SVM shows superior performance in classification especially for limited samples.Therefore,they can be combined to get a better and effective multilayer architecture classifier.SVM is used to resolve the uncertainty of the remaining signal which is confusable after the HMM-based recognition.
针对战场环境下声信号的特点,算法综合考虑HMM适合处理连续动态信号及SVM小样本情况下的强分类能力,利用HMM处理待辨识的连续动态信号,将HMM易混淆的信号作为与待辨识信号较为相似的模式类,形成候选模式集,再由SVM在候选模式中对待辨识信号作最后决策。
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This method is that we first threshold image from the image, then we apply fuzzy distance transform to get fuzzy distance image, and finally, we use the watershed algorithm to apart conglutinant or overlapped grain.
该方法首先对颗粒图像进行二值化,然后对图像作模糊距离变换得到模糊距离图,再利用分水岭算法将粘连或者部分重叠颗粒分离。
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And this paper also shows the structure and parameters of the optical system. The Xenon light of super high voltage is used as interferential source. The position of it is on the focus of the reflector of ellipsoid surface. After reflecting, its lights form a collective point . This point and objective focus of collimation lens are superposition. Though the collimation lens, the beam of light become parallel lights. Then though the Coude Reflector and radiation system of special prism, the lights become a beam of light with 3 ° emanative angle.
该光学系统选用超高压氙灯作光源,使其位于椭球面反射镜的一个焦点上,发出的光线经椭球面反射后所形成的汇聚点与准直负透镜组的物方焦点重合,光束经准直系统后变为平行光束,此平行光束再经库德反射镜和特殊发散棱镜系统,形成具有3°发散角的发散光束,用来干扰敌方设备。
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You could see them cramping up at the end.
你能看到他再后面乱作一团。
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According to the authors the suprapublic cystostomy and delayed urethroplasty offer a better choice of therapy.
受伤后立即作上耻骨膀胱造廔术及3个月后再施以尿道修补术是我们以后治疗尿道外伤的主要方法。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。