四元

Respectively. The results of regression and calculation of the quaternary system provide fundamental data for designing and optimizing the preparing process of the PSC adduct.

该四元体系Pitzer参数的回归及相平衡的计算，为〓的合成工艺条件研究及工程设计提供了基础数据。

Can be very convenient to realize from the arithmetic expression Quaternion-based translation, courses in compiler design principle very useful.

详细说明：可很方便的实现从算术表达式到四元式的翻译，在编译原理的课程设计中非常有用。

Another approach in enhancing the light extraction efficiency of AlGaInP LED was accomplished using a surface roughening process. In this process, the Au(170 nm)/AuBe(260 nm)/Au(170 nm) ohmic contact layers were first deposited on the GaP window layer. After the alloy annealing process (480°C for 10 min), the Be atoms will diffuse into the GaP top layer and form non-uniform clusters. The LED samples were then immersed into a mixture 3H3PO4:1H2O2:1H2O solution for 6 min, resulting in a rough GaP surface. The luminous intensity of the AlGaInP LED can increase from 42 to 50 mcd, that is, an 18% enhancement can be achieved via the present non-photolithography surface roughening process.Keywords: LED, AlGaInP, Cu substrate, Reflector, Surface roughening

在实验的第二部份是开发磷化镓窗口层之粗化制程，我们是藉由正面金/铍欧姆接触电极之熔合制程，使铍扩散至磷化镓层，同时利用铍渗入磷化镓造成之特殊组成，可形成不均匀之蚀刻阻挡，而在磷化镓表面形成粗化，我们发现480℃、10分钟的熔合制程，加上浸泡磷化镓蚀刻溶液6分钟，可将四元发光二极体之发光亮度由42 mcd 提升到50 mcd，经由此无光罩粗化制程可将亮度提升18%，明显提升磷化铝铟镓发光二极体之外部量子效率。

Since the survey of Lindner and Rosa in 1978, one of the interests in the area of 3-designs has focused on establishing the existence of Steiner quadruple systems with a prescribed automorphism group.

Lindner和Rosa在1978年对斯坦纳四元系及其相关问题做了一篇综述。

Quaternion matrix, singular value decomposition, CS decomposition,canonical angle.

由于四元数矩阵乘法运算的复杂性，利用【n，12}的方法很难求出具体的奇异值分解式来。

The author generalized the results of the centralizer of matrix over complex number field to Real Quaternion field .

推广了数域上的矩阵中心化子理论，得到了实四元数体矩阵上的中心化子理论

Today she specially went out to buy a long sleeve collarless woolen garment which $14; it's rather light in weight.

今天特地出去买了一件长袖开领的羊毛衣，价十四元，甚轻，明日凑书籍计足三磅付邮寄去。

It contains 1029 leaves of strong, smooth vellum, fresh-looking today, despite their great antiquity, arranged in quires of four sheets, or quaternions.

它载有1029叶强，顺利vellum ，新鲜前瞻性今天，尽管他们的伟大，古物，安排在quires四个床单，或四元数。

For four yuan Bridge, the four-Bridge, Shibalidian bridges Block 13 overpass around the green belt and Chaoyang Park, the red scarf Park, fired criminal Lake Park, 18 large public green spaces, garden experts in the design, determine to planting large trees specifications mainly determined 2-3 keynote species and 7-8 major species to the natural-style tablet Hunjiao, a large group of ambitious momentum for the City of Victoria Road green spots become all Parts of the show.

对于四元桥、四惠桥、十八里店桥等13座立交桥的周围绿化带和朝阳公园、红领巾公园、窑洼湖公园等18个大型公共绿地，园林专家们在设计上，确定以栽种大规格乔木为主，确定2至3个基调树种和7至8个主要树种，以自然式片状混交、大型组团方式形成宏大的气势，让这些景点成为四环路绿化全线的精彩片段。

Quaternions extend the concept of rotation in three dimensions to rotation in four dimensions.

四元数将三维中旋转的概念扩展到四维中的旋转。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。