查询词典 the bulk of
- 与 the bulk of 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In the first part, it was investigated the interaction between Pb2+ and La4Ti9O24 ceramic bulk. The result shows that a significant Pb2+ diffusion into La4Ti9O24 ceramic bulk and a significant crystallization of the La2/3TiO3-type phase is clearly observed in the Pb2+ diffusion layer. The reacted zone consists of the La2/3TiO3-type phase exhibits the linear dependence of the square of the thickness, x, on the heat-treated time, t, in excellent agreement with the parabolic law x2 = kt, where k is the growth rate coefficient. The kinetic study thus indicates that the Pb2+/La4Ti9O24 interaction strictly obeys the theory of the reactive diffusion. Furthermore, the experimental k values were used to determine the associated activation energy, Ea, for the formation of La2/3TiO3-type phase using the Arrhenius plot and the following least-square equation, ln =-Ea/RT + A, where T is the annealing temperature, R is the universal gas constant, and A is a constant, resulting in Ea ~ 607 ?b 60 kJ/mol.
首先, 以巨观的方式观察PbO与La4Ti9O24陶瓷体介面的反应现象;利用X-ray绕射分析以及扫描式电子显微镜来观察不同的热处理温度以及不同的持温时间所制作的样品,研究结果发现, Pb2+离子会渗入到La4Ti9O24陶瓷内,同时在Pb2+离子所渗入的区域内会产生新的La2/3TiO3-type钙钛矿斜方晶相;藉由量测不同温度与时间之样品,其因Pb2+离子渗入而产生之La2/3TiO3-type相层厚度之关系,符合反应式扩散机制中 x2 = kt 之关系式(其中 x:扩散层厚度; k:反应速率常数; t:反应时间);进一步将不同实验条件所得到之反应速率常数值代入Arrhenius方程式ln (k =-Ea/RT + A ,其中Ea:活化能; T:绝对温度; R:气体反应常数; A:常数,可以求得Pb2+离子与La4Ti9O24陶瓷发生反应式扩散所需之活化能为607 ± 60 kJ/mol。
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The bulk of mankind is rigidly unphilosophical, and nowadays the bulk of mankind votes.
人们的大多数是极端缺乏哲学头脑的。而今天,人们的大多数却拥有投票权。
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Warehouseman will info Merchandising Dept when received customer bulk fabric at first, warehouse will hand over the color swatch to Merchandiser Manager for confirm once bulk fabric have not any related info.
当客供布料入库时,仓库必须第一时间通知业务部。仓库在收到无任何信息布料情况时,及时做色卡交付业务部经理确认。
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The numerical results for semiconductor heteroj unctions consisting of III-V group show that the contribution from 10 phonons with higher frequency can not be neglected in weak field limit, although the bulk LO phonons are more important to influence on the PCM. As increase of a magnetic field, the contribution from the two branches of 10 phonons tends to be comparable with that from the bulk LO phonons.
对Ⅲ—Ⅴ族GaAs/AlAs半导体异质结的计算结果显示:在弱场极限,尽管体纵光学声子对极化子回旋质量的影响更为重要,但高频支光学声子的贡献是不容忽略的;随着磁场的增加,两支界面声子的贡献逐渐变为与体纵光学声子的贡献相比拟。
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Results of orientation mensuration of two successive years showed that:①The mulching enhanced the difference in the number bacteria and fungi in rhizospere and bulk soil, and increased the R/B of number of edaphon in rhizospere and bulk soil.
①覆盖处理能强化玉米根区、根外细菌及真菌的数量差异,提高玉米根区与根外土壤微生物数量比值。
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Degradation test in vitro was carried out in phosphate buffer solution (0.1M, pH7. 4) at 37 ℃. The buffer solution was changed daily. Degradation test in vivo was implanted the sample to subdermal in adult ICH rat in the scapular area lateral to the dorsal midline. At suitable time the samples were recovered. Molecular weight changes in surface layer and bulk of polymer sample were measured by GPC and weight loss was determined gravimetrically. It was found that the degradation behavior can be regulated by changing the composition of copolymers. The critical compositions from surface to bulk degradation behavior for PGCA, PLCA, PLMCA, PLDCA systems were 15-20, 20-30, 30- 40, 40 of mol percent GA or LA unit in copolymers, respectively. The degradation behavior of PGCA, PLCA, PLMCA, PLDCA systems were compared and analysed. Some factors influencing the degradation character, such as copolymer composition, hydrophobicity, crystallinity and enzyme affect etc. played important role.
体外实验中材料降解环境为37℃,0.1M,pH7.4磷酸缓冲溶液,每天换液,定期取样;体内实验中将聚合物试样埋置于ICH小白鼠背部肩胛骨皮下部位,定期处死小鼠,取样,将体内体外样品进行重量损失及试样内外层分子量变化测定,分析各聚合物试样降解行为特性,实验结果证明,改变共聚物组成,可以调节各聚合体系降解行为特性,对PGCA,PLCA,PLMCA,PLDCA共聚体系,交酯摩尔百分含量15-20%,20-30%,30-40%,40%分别为各体系内降解行为特性由表面降解型向本体降解型过渡的临界转折点,交酯含量较低的聚合物不同程度地表现表面降解行为特性,论文对各共聚体系体内外降解行为作了分析对照,例如共聚物组成对材料降解速度与降解行为的影响;生物体内酶对降解行为的影响;材料亲疏水性,聚合物链段结晶行为及碳酸酯结构对材料降解行为的影响等,得出交酯/环碳酸酯共聚体系降解行为一些共性和规律。
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Dry bulk hemorrhoid therapy: will be applied to dry bulk hemorrhoids hemorrhoids surface, so that haemorrhoidal necrosis, dry off, wound healing, the Law is applicable to stage Ⅲ and incarcerated hemorrhoid internal hemorrhoids.
引起便血的原因有上消化道出血和痔疮、肛裂等疾病,如果你的便血是鲜红的,那有可能是痔疮或肛裂了,痔疮的治疗方法如下
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A new method and the principle is presented for plotting the critical metacentric height curve which meets IMOs intact stability criteria and weather criteria,and the critical metacentric height curve which meets 1976 SOLAS intact stability criteria. And the critical metacentric height curve is used in the Stability check of bulk grain carriers in accordance with the stability rules for bulk grain carriers.
本文还具体给出了满足IMO完整稳性和天气衡准的临界初稳性高度的求作方法,以及满足1976 SOLAS公约散装谷物船舶的稳性衡准要求的临界初稳性高度的原理和求作方法,并将由此得到的临界初稳性高度曲线综合运用到散装谷物船舶的稳性校核。
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The aim of this study was to develop a novel amphiphilic functional block poly(ε-caprolactone) bearing ketone groups MPEG-b-P(OPD-co-CL. 2-oxepane-1, 5-dione was copolymerized with ε-caprolatone in which methoxy poly (MPEG, Mn=5 000) and stannous octoate were used as initiator and catalyst, respectively. The syntheses were conducted by bulk and solution polymerization. 1H NMR results showed that peak position and splitting of the polymers synthesized through solution polymerization were consistent with theoretical data, demonstrating the products were designed block copolymers. While in the bulk polymerization, polymer peak position was changed due to their high reaction temperature, suggesting their structural variation.
将带有羰基官能团的4-羰基己内酯和ε-己内酯分别在甲氧基聚乙二醇(MPEG,Mn=5 000)为引发剂,异辛酸亚锡为催化剂溶液和本体体系中开环聚合,合成了两亲性侧基带有羰基官能团的聚己内酯嵌段共聚物MPEG-b-P(OPD-co-CL.1H NMR结果表明采用溶液聚合法合成的聚合物各峰的峰位置和分裂情况与理论一致,证明了产物是实验所设计的嵌段共聚物,而采用本体聚合法合成的聚合物由于温度的影响,聚合物各峰的峰位置发生了变化,说明其结构发生了变化;差示扫描量热法分析结果表明随着OPD单体含量的增加,聚合物的熔点,玻璃化转变温度和熔融焓增加;热失重测试结果表明OPD单体的引入增加了聚合物的热敏感性。
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In this paper,the forming mechanism and affecting favtor of bulk metallic glasses is systematically discussed from the aspects of thermodynamic, kinetic and microstructure . Thermodynamic factors which favor the amorphization of alloys analyzed, the glass forming range of ternary alloys system was proposed by using Miedema theory, Toop model and considering the influence of free energy of pure metals at different temperature. The approach was applied to predict the composition range of amorphous Mg-Cu-La alloys. Several methods(such as three empirical criterions ,binary alloys phase diagram , Miedema theory and Toop mode) were used to design a series of Mg65Cu25La10 、Mg68Cu17La15 and Mg57Cu23La20 alloys, These bulk amorphous alloys with maximum diameter thickness reaching to 1mm were prepared by means of graphite-molding casting though the raw materials are of a low purity by conventional casting processes at a low cooling rate.
本文从合金的热力学、动力学及结构形成条件方面系统的讨论了Mg 基大块非晶的形成机制及影响因素,并从非晶形成的热力学观点出发,综合应用Miedema理论和Toop 模型,并考虑纯金属在不同温度下的自由能,在此基础上提出了一种定量预测三元非晶合金形成范围的方法,用该方法计算Mg-Cu-La 三元合金系的非晶形成范围,应用多项技术(三经验原则、二元合金相图及Miedema 理论和Toop模型)设计了Mg65Cu25La10 、Mg68Cu17La15 和Mg57Cu23La20非晶合金。
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- 推荐网络例句
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The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.
该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性,而切还赋予它以新的意义。
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If he thought that he could buy me off, he would be wrong.
如果他认为他可以收买我,那他就大错特错了。
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Can I be excused today's lesson?
我可以不上今天的课吗?