顶光

Methods:Explain the difference between power and vertex power from basic definitions of optics, and analyze the measuring principle and error of focimeter.

从光学的基础定义出发，阐述光焦度和顶焦度的差别，并对焦度计的测量原理和误差进行正确分析。

Ten adult mixed breed dogs without significant individual difference were made transverse fracture at bilateral iliopectineal crest 1.5cm above the dome of acetabulum, which were fixed with ATMF'S or steel plate respectively. The animals were sacrificed and specimens were procured at 2, 4, 6, 8 and 12 weeks after operation. Samples from the fracture gaps were investigated by histology of HE and Masson staining, image pattern analysis of new bone formation.

方法］ 选用10只成年杂种家犬，双侧髋臼臼顶上方1.5cm处横形截骨，分别采用ATMFS（骨盆髋臼三维记忆内固定系统）前柱固定器和5孔重建钢板内固定，于术后2、4、6、8、12周处死动物取材，行HE染色、Masson三色法染色组织学检查，图像分析新骨形成积分光密度值，研究不同应力作用模式下的骨盆骨折愈合情况。

Method］Ten adult mixed breed dogs without significant individual difference were made transverse fracture at bilateral iliopectineal crest 1.5 cm above the dome of acetabulum, which were fixed with ATMFS or steel plate respectively. The animals were sacrificed and specimens were procured at 2,4,6,8 and 12 weeks after operation.Samples from the fracture gaps were investigated by histology of HE and Masson staining,image pattern analysis of new bone formation.

方法］选用10只成年杂种家犬，双侧髋臼臼顶上方1.5 cm处横形截骨，分别采用ATMFS(骨盆髋臼三维记忆内固定系统)前柱固定器和5孔重建钢板内固定，于术后2、4、6、8、12周处死动物取材，行HE染色、Masson三色法染色组织学检查，图像分析新骨形成积分光密度值，研究不同应力作用模式下的骨盆骨折愈合情况。

Method］Ten adult mixed breed dogs without significant individual difference were made transverse fracture at bilateral iliopectineal crest 1.5 cm above the dome of acetabulum, which were fixed with ATMFS or steel plate respectively. The animals were sacrificed and specimens were procured at 2,4,6,8 and 12 weeks after operation.

］选用10只成年杂种家犬，双侧髋臼臼顶上方1.5 cm处横形截骨，分别采用ATMFS(骨盆髋臼三维记忆内固定系统)前柱固定器和5孔重建钢板内固定，于术后2、4、6、8、12周处死动物取材，行HE染色、Masson三色法染色组织学检查，图像分析新骨形成积分光密度值，研究不同应力作用模式下的骨盆骨折愈合情况。

［Objective］To explore the effect of continuous physiological osteogenic stress on the bone healing of canine iliopectineal crest.［Method］Ten adult mixed breed dogs without significant individual difference were made transverse fracture at bilateral iliopectineal crest 1.5 cm above the dome of acetabulum,which were fixed with ATMFS or steel plate respectively. The animals were sacrificed and specimens were procured at 2,4,6,8 and 12 weeks after operation.Samples from the fracture gaps were investigated by histology of HE and Masson staining,image pattern analysis of new bone formation.

探讨持续顺应生理力线的压应力对犬骨盆弓状线部骨折愈合的影响［方法］选用10只成年杂家犬，双侧髋臼臼顶上方1.5 cm处横形截骨，分别采用ATMFS(骨盆髋臼三维记忆内固定系统)柱固定器和5孔重建钢板内固定，于术后2、4、6、8、12周处死动物取材，行HE染色、Masson三色法染色组织学检查，图像分析新骨形成积分光密度值，研究不同应力作用模式下的骨盆骨折愈合情况。

Noctilucent clouds are ragged extensions of a more widespread and more permanent layer which forms over the summer polar area at the mesopause.

夜光云是在夏季极地中圈顶之上形成的更广泛更持久的层的参差不齐的延伸。

Composite optical vortices in two noncollinear cosh-Gaussian vortex beams and their propagation properties in free space.

离轴平顶高斯涡旋光束形成的合成光涡旋及其在自由空间中的传输。

What he wanted for Sydney was the effect he had noticed when tacking round the promontory at Elsinore, of the castle's piled-up turrets against the piled-up clouds and his own billowing white sails; the liberation he had felt on the great platforms of the Mayan temples in Mexico, of being lifted above the dark jungle into another world of light; the height and presence of Gothic cathedrals, whose ogival shape was to show in the cross-sections of the Sydney roof-shells; and the curved, three-dimensional rib-work of boat-building , as he had watched his own father doing it at Aalborg.

当他在艾尔西诺海岬旁作之字形航行时，天边积云朵朵，海水蓝天融为一色，海风一过，巨大的白帆随之鼓起，城堡上层叠而立的塔楼在一片湛蓝中像条游龙飘忽不定。如此景致早已收藏于心。他所向往的悉尼巨作不正是这幅美景的再现么？当他伫立于墨西哥玛雅寺庙辽阔的平台之上时，那份无拘无束的洒脱正从昏暗的丛林中抽身而出，徐徐升腾，遁入另一个光的世界。这不羁的心不正是他想施予悉尼的么？还有那直插云霄的哥特式大教堂，它们的伟岸和雍容时时撞击着他，剖开未来悉尼歌剧院的扇形穹顶吧，横截面上所展示的不正是带着尖顶拱的外形么？当他在奥尔堡傻傻地看着父亲建造船坞时，那有着优美弧线的三维肋拱结构不也是激活他未来创作的源泉么？

This paper studies numerically the influence of the tip clearance on the three-dimensional viscous flowfield and performance of the NASA Low-Speed Centrifugal Compressor impeller with a vaneless diffuser. A three-dimensional viscous code developed by the authors is applied with several acceleration methods: local time-step, multigrid and residual smoothing.

通过求解N-S方程，数值研究了叶顶间隙对NASA低速大尺度离心压缩机三维粘性流场及气动性能的影响，在计算程序中采用了当地时间步长、多重网格以及隐式参差光顺来进行加速。

Rising silently from the top of the castle, a beam of ivory-white light scatters and interlaces like smoke.

一缕象牙白如烟的光悄悄从城顶升了上来，扩散着，交织着。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。