双射

According to the theory of acousto-optic interaction,the formulas of diffraction loss of two AO Q-switches,which acousto-field are perpendicular or parallel one another,in normal Bragg diffraction are derived.

分析了单声光器件、超声场相互平行和相互正交的两声光Q开关器件衍射损耗，给出正常布喇格衍射的超声场相互平行和相互正交的双声光Q开关器件衍射效率的表达式。

All the compounds are characterized by IR and elemental analysis.we design and prepare a bipyridinium supramolecular compound and six coordination compounds, which are also characterized by IR, elemental analysis and X-ray structure analysis. According to X-ray structure analysis, hydrogen bonds and n-n stocking interactions participate in the architecture of three-dimensional framework [H2L1 (NO3)2 (H2O)2]n; one-dimensional zigzag coordination polymer [Hgl21.5CH3OH]n; binuclear metallamacrocycle (HgI2L2)2 3H2O; helical double-stranded one-dimensional coordination polymer [Co2(L2)2-2CH3OH]n; double-stranded one-dimensional coordination polymer [Co2(L3)2-CH3OH-CH3CN]n; and three-dimensional compound [Cu(C5H4NCOO)2(H2O)2]-H2O with hydrogen bonds, three-dimensional coordination polymer {[Cd(C5H6NCOO)2H2O]-DMF}n, which are indirectly obtained from the precursor ligand L3 through metal ion induced the hydrolysis of diamide and self-assembled with the hydrolyzate.

我们首次合成了一个双吡啶鎓超分子化合物和六个过渡金属配合物，并通过IR谱，元素分析和X-ray晶体衍射分析对它们进行了表征。X-ray晶体结构分析表明：超分子化合物[H_2L1·(NO_3)_2·(H_2O)_2]_n是由多种氢键和芳香环间的π-π堆积作用构建的三维无限结构；[HgI_2(L1)·1.5CH_3OH]_n是一维锯齿状配位聚合物；(HgI_2L2)_2·3H_2O是双核金属大环化合物；[Co_2(L2)_2·2CH_3OH]_n是具有一维双螺旋结构的配位聚合物；[Co_2(L3)_2·CH_3OH·CH_3CN]_n为一维双链结构的配位聚合物；以及由非直线形配体L3在金属离子Cu和Cd的诱导作用下发生水解，并且金属离子与水解产物——异烟酸根离子自组装，形成了三维氢键超分子化合物[Cu(C_5H_4NCOO)_2(H_2O)_2]·H_2O和三维配位聚合物{[Cd(C_5H_6NCOO)_2H_2O]·DMF}_n。

The X-ray double-crystal diffraction rocking curve measurements show the full-width half maximum of 180" and 185" for (0002) symmetric reflection and (10 12) skew reflection,respectively.A room temperature mobility of 850cm2/ is obtained for a 3μm thick GaN film.

GaN材料的X射线双晶衍射摇摆曲线(0 0 0 2 )对称衍射和(10 12 )斜对称衍射半宽分别为 180"和 185"；3μm厚GaN薄膜室温电子迁移率达到85 0cm2 /。

In strictly, it is hard to make the light normal incident into the sphere, double refraction will take place in crystal sphere when a TEM〓 mode Gaussian beam oblique incident into the sphere, and the two orthogonal polarized beams are both elliptical Gaussian beam. The ellipticity and eccentricity of the elliptical Gaussian beam will change with the incident angle, and for a fixed incident angle, they will change with the shifting of incident beam waist position.

由于严格意义上的正入射较难实现，基模圆高斯光束斜入射晶体球后将在球内产生双折射，且球内偏振态正交的两束折射光都将是椭圆高斯光束，它们的椭圆度e和偏心度Δ随入射角的改变而改变，在入射角一定的情况下，入射光束束腰的移动也将改变这两束折射光的椭圆度e和偏心度Δ。

The analysis of the Fraunhofer diffraction pattern of the twin rectangle aperture

利用Mathematica软件，通过夫朗和费衍射公式计算双矩孔的衍射光强，并且绘制出了衍射图样。

Several fierce flames are shot to Po. He dodged two then breaks a flowerpot. He makes accurate shot with pieces of broken flowerpot to the outlet of flames. Flaming mechnisms are operated with burning oil so they explodes one by one since the outlets have been obstructed. Later, Po seems to notice something and jumps upward all at once. As soon as he jumped, many steel spears shoot out vertically. A person with inferior martial art must be stabbed into a hedgehog shape. Po, though, shocks away all spears with a heavy both-handed slash which sends out intense collision energy and even makes a shallow pit on the ground. Po lands in the pit then runs to the wall.

只见几道猛烈的火焰向童博射去，童博闪过两道，然后打碎一个花盆，把花盆碎片向火焰射口准确的打过去，火焰机关是靠射出点燃的油，出口一但被堵，就一个个自己炸毁了，之后童博不知察觉什麼突然向上跃起，地面立刻向上垂直射出许多钢矛，要是武功稍差之人，一定被插成刺猬一样，可是童博双手持剑向下用力一劈，猛烈的剑气不但震开所有钢矛，还把地面打出个浅坑，童博落在浅坑中，一转身向墙边跑了过去

Recently, bipolar radiofrequency energy has become popular as a method of performing chondroplasty because of accurately treatment to degenerative cartilage and minimal injury to normal cartilage. But the questions of the effects of bipolar RFE to degenerative cartilage, the reaction of chondrocyte and cartilage matrix, the change of the cartilage after the treatment, and the influence to the cartilage degenerative course, were still unknown.

但是双极射频在关节软骨退变治疗中究竟发挥何种作用，治疗区软骨细胞及软骨基质成分反应是怎样的，随着时间的推移软骨表面的变化如何，双极射频对软骨退变的病程有无影响，这些问题都不清楚。

Three months later, the surface of the articular was smoother than the sham-operated side. The histological score of cartilage was significantly higher than the sham-operated side in patellofemoral joint group p＜0.05=, in the tibiofemoral group the difference was not obvious.

处理后3月，发现髌股关节组双极射频治疗侧髌骨软骨表面仍光滑，软骨组织评分高于对照侧（p＜0.05）；胫股关节组双极射频治疗侧股骨内髁软骨面的形态比对照侧平整，软骨组织学评分没有显著差异。

Objective: Pino et al reported that strip lesions were produced when the distance between two probe was 2 to 6mm, and it resulted in unipolar lesions when they were spaced more than 6 mm apart. However, in clinical studies and some other reports, bipolar radiofrequency treatment was also effective when the distance was 10mm. Therefore, we duplicated Pino et al's experimente to study the lesion morphology when the distance of two radiofrequency cannulae was arranged between 2 and 10mm.

目的： Pino等人的研究发现双针间距在2-6mm之间时双电极之间可形成带状毁损，而8mm、10mm间距时双电极针成为独立的电极毁损，而在临床研究及某些文献报道中可以看到双电极间距在10mm时治疗同样有效，因此本文重复Pino等人的实验，研究双针电极间距在2-10mm时双针射频毁损形态。

Based on the relationship between the numerical aperture of the objective lens and scale pitch, this study chooses a suitable Plano-convex lenses available on the market, so as to approximate the diameter of the focusing spots to scale pitch. Also, by using the optical path of an optical encoder similar to the nanoscale, the changes in the surface profile of the scale can be measured directly, so as to obtain the two quadrature sinusoidal signals. By counting the zero crossing of these two quadrature sinusoidal signals and calculating the interpolation value of these two quadrature sinusoidal signals, the moving direction and moving displacement value of the scale can be obtained.

研究中再以搭配物镜的数值孔径与尺条间距的关系，选择ㄧ适当的市售平凸透镜，使聚焦光点的直径与尺条的间距相近，并使用相同於奈米级长行程双雷射聚焦读头装置的光路设计，如此将可藉由直接量测尺条的表面轮廓变化，以获得一组正交弦波讯号，继而利用讯号四分割与细分割处理，计算出尺条之移动方向与移动量，研制出一实用性长行程双雷射聚焦读头光学尺。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。