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The building rules of GLCM ( the best gray levels and pixels interval) were confirmed by experiment. GLCM texture parameters of 300 wood specimens were calculated and assayed, and then placed into a Competitive Neural Network for classification output. The results are as follows: 1) GLCM parameters Angular Second Moment contrast , correlation , entr
以"角二阶矩"、"对比度"、"相关"、"熵"、"方差"、"逆差矩"作为描述木材纹理的特征参数是合适的。2)在比例为1:1的512×512木材图像情况下,生成灰度共生矩阵的最佳像素间距为4,最佳图像灰度级数为128.3)木材纹理图像灰度共生矩阵的"角二阶矩"、"相关"和"熵"值最大的方向为纹理方向。4)竞争神经网络的分类正确率为88%。
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The latest experimental results of the focusing perfermance of the compound high-energy X-ray lens is designed with PMMA with the parameters of 40 plano-concave elementary lenses positioned in line with axial symmetry, 200 μm radius of the concave surface, 0.15 nm working wavelength, 0.5 mm geometrical aperture and 8 mm length of the compound lens and 1.3 m focus length, are briefly introduced.
报道了这种新型X射线光学元件聚焦性能的最新实验结果。设计的高能X射线组合透镜为聚甲基丙烯酸甲酯材料,包括40个相同的、顺序排布的平凹折射单元,折射单元的球面半径为200 μm,组合透镜的几何口径约为500 μm,长度约为8 mm,焦距约为1.3 m。简要描述了PMMA材料X射线组合透镜的制作技术和制作过程。并给出了X射线组合透镜聚焦性能测试实验系统和实验条件。
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On the basis of the relevant national standards and abundant domestic and international literature data and reports, the quality safety risk assessment was carried out in four steps: hazard identification, hazard description, exposure assessment, and risk description.
依据国家有关标准,结合国内外大量的文献资料报告,按照危害识别、危害描述、暴露评估和风险描述四个步骤进行质量安全风险评估,评估结果为:海南树仔菜中镉的质量安全风险尚不足以造成对人体健康的危害。
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Compared with the exponent function, the power function can be more suitable for fitting the change of chemicals concentrations in runoff under unsaturated conditions from the loess slope,as well as,the mass loss of potassium and bromine in runoff,but not for initial phase. The study offered a reference for developing the model of soil nutrient in runoff transport of the loess slope.
同时利用两种类型描述径流养分浓度模型对实测资料进行分析,结果显示与指数函数模型相比较,采用幂函数模型能够较好地模拟黄土坡面非饱和条件下径流溶质浓度变化过程,同时幂函数模型也能够较好地描述径流中钾离子和溴离子的质量变化过程,为进一步完善黄土坡面径流养分迁移模拟模型提供了参考。
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The hydraulic equation describing the transient flow in canal is transformed into a dynamic equation expressing the control procedure. On this basis, the relationship between variation of flow state and gate opening is established.
从明渠控制方程出发,通过数学处理将描述渠道过渡过程的水力学方程转化为描述控制作用的动态方程,从而建立起渠道水流状态变化与闸门开度变化之间的关系。
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Some type-F monists may hold that a complete physical description must be expanded to include an intrinsic description, and may consequently deny that zombies are conceivable.
一些F一元论者可以持有一个完全物理描述必须被扩展为包括一个固有描述,可以由此拒绝人偶是可设想的。
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In order to analyze the systematic reliability automatically,a model of fault transfer table for describing fault system is developed in two aspects:(1)the format of fault transfer table is improved obviously;(2)the energy flow fault class is put forward so as to supplement the fault transfer table.
为了对系统的可靠性进行自动化分析,本文在两个方面发展了进行故障系统描述的故障传递表模型:( 1 )对故障传递表的格式进行了较大改进;( 2 )提出了能流故障类,以它为故障传递表描述的补充。
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On the basis of propulsive model,a mathematical model which is used to describe the motion of pitching and heaving of dolphin's caudal fin by ways of coordinate transformation is deduced.Meanwhile,this model can show the relationship between the motion of caudal fin and parameters related,then the motion of caudal fin of dolphin is simulated by the software of Matlab which showed the swimming principle.
以海豚背腹式摆动推进方程为基础,应用坐标变换的方法,建立了描述海豚尾鳍俯仰-沉浮运动的数学模型,同时建立了描述豚尾各运动参数之间关系的方程,随后运用Matlab的仿真功能再现了海豚在游动过程中尾鳍的运动规律。
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This thesis studies the English translation of official titles in San Guo Yan Yi with the aid of the self-built Chinese-English parallel corppra,which are composed of original Chinese version and C.H.
本文作者试图用定量与定性相结合的方法,以描述的方法为手段,对两个译本进行详细的描述、对比和分析。
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While the most descriptive accounts of the Gardens come from Greek historians such as Berossus and Diodorus Siculus,Babylonian records stay silent on the matterTablets from the time of Nebuchadnezzar do not have a single reference to the Hanging Gardens,although descriptions of his palace, the city of Babylon, and the walls are foundEven the historians who give detailed descriptions of the Hanging Gardens never saw themModern historians argue that when Alexander's soldiers reached the fertile land of Mesopotamia and saw Babylon, they were impressedWhen they later returned to their rugged homeland, they had stories to tell about the amazing gardens and palm trees at MesopotamiaAbout the palace of Nebuchadnezzar About the Tower of Babel and the zigguratsAnd it was the imagination of poets and ancient historians that blended all these elements together to produce one of the World Wonders
虽然对花园最详尽的记述是出自Berossus 和 Diodorus Siculus等希腊历史学家笔下,但巴比伦的历史记录却对此事只字未提。尽管在尼布甲尼撒时期存留下的各种书写板上发现了对他的宫殿、巴比伦城以及巴比伦的城墙的种种描述,但这些书写板上却没有一处提到过空中花园。甚至那些对空中花园进行过详细描述的历史学家们也从没有亲眼目睹过它们。现代历史学家争论说:当亚力山大的士兵们到达了富饶的美索不达米亚地区并看到了巴比伦时,他们深为所震撼。当他们后来回到崎岖不平的家乡时,带回了有关美索不达米亚的令人惊叹的花园和椰子树……、有关尼布甲尼撒的宫殿……以及有关巴别塔和金字型神塔的各种故事。是诗人和古代历史学家的想象力把这所有的元素混合在一起制造出了世界奇观之一。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力