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The Si/Al ratio of NaY molecular sieve was determined by an empirical formula of lattice constant obtained by extension function method of X-ray diffraction and framework Si/Al ratio of NaY molecular sieve determined by solid nuclear magnetic resonant spectrum method.
前言晶胞参数是决定晶体结构的重要参数之一,Na Y超稳分子筛属立方晶系,由于 Na Y超稳分子筛骨架硅铝比受许多条件的影响,如投料比、晶化温度、晶化压力和晶化时间等。通过研究发现分子筛骨架的硅铝比与其晶胞参数相关,而分子筛的硅铝比可作为合成分子筛产品质量的控制指标 [1] 。
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Based on the analysis of current situation of urban traffic signal control, a method of single intersection signal control was presented based on fuzzy neural network control. Density of vehicle flow of current and next phase was determined by detecting the queue length of the current and next phase, so that it was further determined whether the phase should be changed or not.
在分析城市交通信号控制研究现状的基础上,提出一种基于神经网络模糊控制的单路口交通信号灯控制方法,通过检测当前相位的排队长度和下一相位的排队长度得出当前相位以及下一相位的车流密度,进而判断是否进行相位变换。
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The super-cooling points of Locusta migratoria tibetensis were determined. The physiological and biochemical indexes related with the super-cooling capability were also determined.
通过对该虫各发育阶段过冷却能力测定,研究了各发育阶段虫体内生理生化物质与过冷却能力之间的关系,揭示了该虫耐寒性规律。
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Theoptimeter growthing environment of Anthurium andreanum seedlings wastested by the photosynthetic rate;The important factor of the soilless culture of Anthurium andreanum seedlings was decided by variance analysis of the total areas of leaves, height of seedling, the content of chlorophyll, photosynthetic rate;The best statistical level was defined by Duncans test;The optimum substrate and nutritional solution were determined by analysis of the major components; The requirements of macro- element at the different growth period have determined by the timing of flowering and measuring the content of N, P, K, Ca , Mg of leaves which can offer the theory of the soillessculture of Anthurium andreanum.
测定各处理组合的总叶面积、株高、叶绿素含量、光合速率等形态、生理指标,并对这些指标进行正交试验的方差分析来决定影响安祖花无土栽培的主要因素。通过对主要因素各水平进行新复极差检验得出最好的水平。综合考虑主要因素和水平找出最适合安祖花无土栽培的基质、营养液。观察各处理安祖花初花期的早晚,并通过测定不同时期叶片中的N、P、K、Ca、Mg的含量,确定安祖花不同生长时期对大量元素的需求情况,为今后更好的进行安祖花无土栽培提供理论依据。
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The conductivity type (defining the nature of the majority carriers) and resistivity are found at the seed, middle and tang end of the rod; the type is determined in accordance with ASTM F42-02 ("Test Methods for Conductivity type of Extrinsic Semiconducting Materials"), and resistivity is determined in accordance with ASTM F397-02("TestMethods for Resistivity of Silicon Bars Using a Two-Point Probe").
导电率类型和抵抗力在竿的种子、中央和强烈的味道结束被发现;类型符合美国材料试验学会 F42-02("非固有半导体的材料导电率类型的测试方法")被决定,而且抵抗力符合美国材料试验学会 F397-02("矽的抵抗力的测试方法酒吧使用一个二点的探针")被决定。
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In this paper, a new region-determined half tree hierarchical MRF model is proposed and its region-determined maximizer of the posteriori marginals algorithm is inferred.
本文提出一种新的基于区域确定的半树分层 MRF 算法,并推导出它的最大后验边缘概率(Maximizer of the posteriori marginal, MPM)算法。
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Based on investigating the short and intermittent structural plane, surrounding rockmass of the huge underground powerhouse in Three Gorge has been divided into five statistical similar areas according to its characteristic of rockmass structure by applying structure plane network simulation. Distributed characteristic of structural plane has been studied and based on it mechanics macrocharacteristic has been studied:(1) It is the first time that based on the result of structural plane network simulation rockmass quality of every structure area has been studied with applying blurred information optimum seeking technique and be compared with and RQD method. The result indicated that it has better effect to evaluate rock quality with blurred information optimum seeking technique.(2) It is the first time that the interrelated relationship of the result of in-suit rockmass deformation test and fractal characteristic of structure on test point has been applied to determine rockmass deformation parameter. The question of evaluating deformation parameters of engineering rockmass has been solved.(3) Anisotropy strength parameters have been determined by applying shear zones simulating method. The result indicated that there are different strength parameters in every structural area, after comparing the result of Fast Lagranian Analysis in continua number simulation method with that of method of weighted mean according to continuity. The result indicated that when a suitable reduction coefficient is been considered rockmass strength parameters can be simply and fast determined with method of weighted mean according to continuity where there is not enough test result.(4) Damage characteristic has been studied based on analysis fractal characteristic of structural plane network by applying fractal-damage coupling method. It is the first time that the concept of damage degree has been set up to evaluate rockmass quality according to the biggest principal damage.
通过对短小、断续性结构面统计特征的研究,将地下厂房区划分为五个岩体结构统计均质区,应用结构面网络模拟技术研究了各个岩体结构均质区结构面的发育分布特征,并以此为基础对岩体宏观力学特性进行了深入研究:(1)首次通过在结构面网络模拟计算结果的基础上,应用模糊信息优化技术研究了厂房区各个岩体结构分区的岩体质量并与岩体基本质量指标研究法、岩体质量指标RQD值研究法作了对比,结果表明以结构面网络模拟结果为基础,应用模糊信息优化技术进行岩体质量评价能够取得很好的效果,解决了工程岩体质量的定量评价问题;(2)首次通过对已有的现场大型岩体变形试验结果的分析及相应试验点岩体结构分形特征的研究,建立了结构面分布的分形维数和岩体变形指标间的相关关系,并首次应用这种相关关系根据结构面网络模拟及分形维数计算结果确定了缺少试验结果的地下厂房各工程部位的岩体变形指标而且应用于围岩稳定性计算,解决了工程岩体宏观变形参数的评价问题;(3)应用在结构面模拟网络图上模拟岩体剪切破坏带的方法,得出了岩体在不同方向上的强度参数,结果表明岩体的强度特性与结构面的发育方向和程度有着明显的关系,各个岩体结构均质区具有不同的强度参数;同时还通过应用拉格朗日差分法对岩体强度指标的数值分析并与按连通率加权平均计算法对比表明,按连通率加权平均计算法在考虑合理的折减系数情况下,可以简单快速地对缺少现场大型试验结果的具体工程部位实现岩体强度指标的估计,通过以上研究解决了工程岩体抗剪强度参数的评价问题;(4)通过结构面网络分形维数的研究,应用分形损伤耦合分析方法,研究了厂房区岩体的损伤特征,并首次引入"损伤度"的概念,建立了应用最大主损伤评价岩体质量的指标体系。
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Results The recovery rate of three representative bacteria determined by the culture media dilution method, were more than 70% and the recovery rate of two representative mold and fungus determined by the membrane filtration methods with 1000 ml washed, were more than 70%.
结果 采用平皿法中的培养基稀释法测定样品人工污染3株细菌代表菌株的菌回收率均于70%,采用薄膜过滤法在冲洗1 000ml时,测定样品人工污染2株真菌代表菌株的菌回收率均大于70%。
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The fluid film bearing-flexible rotor nonlinear system with squeeze film damper is modeled practically using the finite element method and the Hamilton principle.(3) The film forces produced by fluid film bearing and squeeze film damper are determined by finite element method at any moment, and the Jacobian matrix is also determined.(4) A method for analyzing the dynamics of a large system with local nonlinearities is presented. The stability and bifurcation of the equilibrium position and the unbalance responce of a fluid film bearing-flexible rotor system with squeeze film damper are investigated based on the assumption of an incompressible lubricant together with the long bearing approximation for fluid film bearing, short bearing approximation for squeeze film damper and the"π"film cavitation model.
主要研究内容包括下面几个方面:(1)对挤压油膜阻尼器-滑动轴承-转子非线性动力系统中的非线性现象进行了机理方面的研究;(2)应用有限元方法及Hamilton原理对复杂的挤压油膜阻尼器-滑动轴承-转子非线性动力系统进行了建模分析;(3)对滑动轴承及挤压油膜阻尼器中任一时刻的油膜力及相应的Ja-cobi矩阵的确定进行了分析;(4)对一类具有局部非线性的多自由度动力系统,提出了一种可以有效地分析其动力特性的方法;(5)采用实验与理论分析相结合的方法,对挤压油膜阻尼器-滑动轴承-转子非线性动力系统的动力特性进行了分析。
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The levels of monoamine neurotransmitters were determined with spectrofluorophotometer and the content of flavonoids was determined with ultraviolet spectrophotometry.
结果:罗布麻叶乙醇提物对小鼠的不动时间没有显著的影响,而其他4个部位均可不同程度的降低小鼠的不动时间,其中正丁醇部位和水相部位的作用最强。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。