查询词典 uranium oxide

In some embodiments, a graded semiconductor buffer layer is located beneath the buried oxide layer, while in other a doped semiconductor layer including Si doped with at least one of B or C is located beneath the buried oxide layer.

在一些实施方案中，渐变半导体缓冲层位于隐埋氧化物层下面，而在其他实施方案中，包含掺杂有B或C中至少一种的Si的掺杂半导体层位于隐埋氧化物层下面。

Vulcanization thing in sulphur natural gas, take off to exclude, Make organic sulfur content and the vulcanization hydrogen of the natural gas of raw material accord with relevant technical index requirement , satisfy production needs,Today of the chemical swift development of natural gas the desulphurization method of natural gas also emerge endlessly , In traditional a ethanol amine the foundation of wet desulphurization and the dry law desulphurization of zinc oxide on, have arisen the desulphurization of normal temperature of ferric oxide, the dry law desulphurization of activated carbon and member sift desulphurization, DDS biochemical wet desulphurization wait for new technology .

硫的存在造成合成氨工艺中催化剂中毒，因此需将含硫天然气中的硫化氢、有机硫等硫化物脱除，使产品天然气的硫化氢和有机硫含量符合有关技术指标要求，满足生产需要。在天然气化工迅猛发展的今天，天然气脱硫方法也层出不穷。在传统一已醇胺湿法脱硫，氧化锌干法脱硫的基础上，出现了常温氧化铁脱硫，活性炭干法脱硫，分子筛脱硫，DDS生化湿法脱硫等新技术。

The educt is boricacid on the surface of the composite, it is believed that oxide reaction takes placeduring the sintering of 〓-BN composite, and part of oxide outgrowth -〓has been left in the sintering body.

通过分析〓-BN复相导电陶瓷表面析出物及〓粉和BN粉的氧化产物，揭示〓-BN复相导电陶瓷中残留的氧化产物——氧化硼是〓-BN复相导电陶瓷引起潮解的主要原因。

The bioactive screening on aldose reductase, nitric oxide synthetase, liver cancer Bel-7402, cavum oris epithelioma KB and colon cancer HCT-8 showed that paeoniflorin inhibited the nitric oxide synthetase by the rate of 83. 4% at the concentration of 5μg/ml, and paeoniflorigenone inhibited the colon cancer HCT-8 cells by the rate of 83. 2% at the concentration of 5μg/ml.

通过醛糖还原酶、NO合酶、肝癌Bel-7402、口腔上皮癌KB以及结肠癌HCT-8五种模型的生物活性筛选表明，在51μg／ml的浓度下，芍药甙对NO合酶的抑制率达83.4％，芍药甙元对结肠癌HCT-8细胞株的抑制率达83.2％，有较好的抑制作用。

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

The progress in the catalytic ring-opening polymerization of ethylene oxide and propylene oxide is reviewed in this paper.

环氧乙烷和环氧丙烷的开环聚合产物在表面活性剂工业和聚氨酯工业得到了极为广泛的应用。

Ferric oxide is the most abundant metal oxide, and it is very important in oxidization- reduction of soil and in soil-shaped process.

氧化铁是土壤中最为丰富的金属氧化物，在土壤的氧化还原反应和土壤形成过程中起着十分重要的作用。

A natural brown earth containing ferric oxide and manganese oxide s,used as pigment.

棕土含有红色氧化铁和氧化锰的天然棕色泥土，用作颜料

Ferrous oxide , is one of iron oxide .

氧化亚铁，是铁的氧化物之一。

The degradation and breakdown of thin gate oxide film are related with the generation of traps in oxide layer.

摘 要：薄栅氧化层的退化、击穿与氧化层中和界面陷阱的产生相关。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。