精确确定

Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.

本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究，获得如下重要认识：（1）发现辉石出溶结构，由此获得峰期变质温度为850 C，并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质；（2）通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因，进而确定该区不存在晚期角闪岩相变质作用；（3）在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩，为泛非构造热事件的碰撞造山成因提供了重要佐证；（4）对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期，～550 Ma，热事件结束于～500 Ma，年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象；（5）进一步确认了东南极内部普里兹带的存在，它属于冈瓦纳超大陆内部的第二条泛非期缝合带，据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成，而是多个不同块体拼合的结果。

Aimed at the characteristic of retinal images, the algorithm of extraction of branch point and crossing point of vessels is proposed, the content includes the confirmation of the number of branch points and the precise extraction of the location of branch points. Branch point corresponding is determined by distance and the angles.

针对视网膜图像的特点，提出了一种血管分支点和交叉点的提取方法，包括分支个数的确定、分支点位置的精确提取等；在特征点对应性确定方面，提出利用距离度量和具有旋转、平移不变化的角度特征进行对应性的确定。

A method was developed to determine the activation energy and material parameters in the hyperbolic sine constitutive equation.The activation energies determined are 570 kJ／mol and 548 kJ／mol for steel T122 in saturation stress and peak stress,respectively.The values of critical strain for dynamic recrystalli...

采用应变硬化速率—应力曲线图较精确地获得了饱和流变应力和峰值应力；用回归法确定了双曲线本构方程中的变形激活能及材料常数，确定了T122钢在饱和应力和峰值应力条件下的变形激活能分别为570和548 kJ／mol；采用力学方法直接从流变曲线确定了T122钢发生动态再结晶的临界应变量，并回归出临界应变量与Zener—Hollomon参数的关系式。

One layer is near the Earth space, the other is near the Moho.

利用2004～2005年Hi-CLIMB计划架设在藏南日喀则附近由28台宽频带数字地震仪组成的二维台阵的地震记录，应用双差层析定位方法对454个区域地震进行了精确重定位，共确定了340个地震的精确位置。

Besides, an accurate solar model can be used to more accurately determine the mass of the μ neutrino if any.

另外，如果μ中微子有质量，可以用精确的太阳中微子理论预言去较精确地确定μ中微子的质量。

The traditional box-counting algorithm is based on the grid document and has some serious shortcomings, such as the distortion of the image being enlarged, the trivialness of the process and the finite of the iterative degree, etc.

实践表明，该算法有3个优点：（1）图像不会随着放大缩小而失真；（2）可完全进行计算机操作，且简单可靠；（3）从某种意义上讲，由于迭代的次数可以是无穷的，所以能非常精确地确定图形的标度空间，并可获得精确的分维值。

A new method was given for determining the eye movement in a video-oculography system, where the centroid method was used to get the initial position of eye center, a edge filter was used to obtain all the boundary of the pupil, then a ellipse fatting was used to determine the accurate position of the eye center.

本文提出了一种全自动确定眼动平动的新方法。首先用形心法确定瞳孔的初始位置，再用亚像素边界算子提取瞳孔边界，并用带自动优化功能的椭圆拟合最终确定瞳孔的精确位置。

In the real world, only few problems can be described precisely, and most of them are imprecise or incomplete or uncertain.

在现实世界中，能够进行精确描述的问题只占较少一部分，而大多数问题是非精确、非完备或者不确定的。

Based on the above analysis and systematic design concept, VC++ language was employed to program for the tree image segmentation system and the tree crown recognition system and some still images were processed by the systems.

论文最后对树形识别系统在农药精确对靶喷雾中的应用进行了分析，从理论上研究了树木的类型同精确喷雾之间的关系，结合已识别出的树形及其相关参数，同时输入喷雾的相关参数，最终确定工作喷头的重叠量δ〓，从而作出判断，输出控制信号，决定工作喷头的数量及可变量喷雾技术的应用，以达到精确喷雾的目的。

Theoretical consideration, along with original, high-quality information regarding the above-listed variables made it possible to reproduce very accurately the observed changes in OPD. but not yet precisely enough at the individual level in indeterminate spawners. 2008 Elsevier B.V. All rights reserved.

相关理论，最初的高质量的信息具有变化性，使得可能观察到很精确的 OPD 的改变，但还没有精确到能够估计不确定产卵类型的独特水平。

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。