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    Control Effect Analysis for a Direct Gradient Wavefront Reconstruction Algorithm
    直接斜率波前复原算法的控制效果分析
    Determination of ISO Aerial Speed and Average Gradient of Black -and -White Aerial Camera Films
    黑白航空摄影胶片ISO航空感光度和平均斜率的测定方法
    1.5 Tesla scanner . DCE-MRI were acquired using a 2D spoiled gradient echo pulse sequence(TR/TE/Flip angle=9.7ms/1.7ms/20°) . MSI and PEI of time-signal curve were analyzed.
    同时行DCE-MRI检查,采用2D SPGR序列(TR/TE/Flip angle=9.7ms/1.7ms/20°),分析时间-信号曲线参数最大强化斜率(MSI)和正增强积分(PEI),以对侧脑组织为标准参照。
    (2) The chondrite,normalized REE patterns show a negative gradient and the average LREE/HREE ratios of the three cores are 37. 36, 26. 33 and 17. l6, reflecting higher LREE contents in these sediments. But the REE curve normalized by North America shales (NASC) is a horizontal one.
    ②REE球粒陨石标准化的分布模式曲线表现为负斜率,富集轻稀土,WP1、WP2和WP40孔LREE/HREE比值平均值为37.36,26.33和17.16,页岩标准化曲线大致呈水平;
    By using the concept of power spectra reject function which defined in this paper, the control effect of an adaptive optical system using direct gradient wavefront reconstruction algorithm was analyzed.
    建立自适应光学系统功率谱抑制函数的概念,分析了采用直接斜率波前复原算法的自适应光学系统的控制效果。
    Both the theoretical analysis and experiments on the 61 element adaptive optical system show that the direct gradient wavefront reconstruction algorithm will lead to the dropping of the control effect of the adaptive optical system.
    理论分析与61单元自适应光学系统上的实验结果表明,直接斜率波前复原算法将导致控制效果下降
    The maill features of the geoacoustic model can be expressed as follows: in the range of ρ=10.0~15.0, the bulk density of the fluid mud p increases linearly with depth z, however, there is a gradient change (knee) when ρ is about 12.5. After ρ more than 15.0, the fluid mud quickly transform into the ooze layer.
    其主要特点是:重度ρ(kN/m3)在10.1到15.0的范围内,随着深度线性增加,但在12.5左右处线性增加的梯度(斜率)有一个突变(拐点),ρ大于15.0以后,ρ随深度的递增加快,即浮泥层很快过渡到硬性泥层或沙层;
    With simple structure,it has fine linear relationship during the range of 5×10 -5 -1×10 -2 mol·L -1 U and its response gradient is closed to the Nernst thcoretical value.
    其结构简单,在铀含量为5×10-5-1×10-2mol·L-1范围内有良好的线性关系,响应斜率接近Nernst理论值。
    Results: (1) T grain average gradient was 27, MS CaWO4-Fuji RX system average gradient was 24. (2)Exposure conditions of distance method were set at 60~80 kV, mAs was selected based on the density of 22 on film acquired at the distance 1005 cm(LogRE=12).
    结果  (1)T颗粒的平均斜率 2 7,MSCaWO4/FujiRX体系的平均斜率 2 4。 (2 )距离测定法的曝光条件取定在 6 0kV~ 80kV ,mAs以在距离 10 0 5cm[相对曝光量对数 (LogRE =1 2 ) ]时得到密度值 2 2为选取指标。
    (2) Average gradient of overall characteristic curve was 1.98, 3.10, and 3.75 when GA was 0.8,1.4, and 2.4. (3) Overall characteristic curve rotated around rotation center when rotation amount was changed.
    (2 )旋转量 (rotationamount,GA)为 0 8、1 4、2 4时 ,总特性曲线平均斜率分别为 1 98、3 10、3 75。
    To get the sample rid of any impurities, a film of Nafion was applied to the W/WO\-3 electrode,which has good linear relation at the electric potential range of pH 2.0~12.0. The Nernstian gradient was(-53.5±0.5)mV/pH.
    该W/WO3/Nafion修饰电极在pH值2.0~12.0的范围内有良好的线性关系,能斯特(Nernstian)斜率为(-53.5±0.5)mV/pH;
    Error analysis of reconstruction matrix with direct gradient method
    直接斜率法复原矩阵误差分析
    Hepatic arterial perfusion (HAP) was calculated by dividing the peak gradient of the liver TDC before the splenic peak by the peak hepatic arterial enhancement.
    读取TDC参数,并输入微机进行灌注值计算。 肝动脉灌流量(HAP)等于动脉期的肝TDC最大斜率除以肝动脉强化峰值,门静脉的灌流量(HPP)等于门脉灌流TDC最大斜率除以门静脉强化峰值。
    The program is finished by the software Matlab. Data of 10 firing lines with different gradient are introduced to the network and the test results prove the practicability of using BP neural network in simulation of firing temperature field.
    文中利用matlab编程,建立了BP神经网络串并联模型,并用10种不同斜率的直线烧结曲线下所得到的温度场数据样本对网络进行训练,不规则烧结曲线样本对训练得到的网络进行了测试,测试结果表明BP神经网络可以用于陶瓷坯体温度场的模拟。
    The change of the resistivity for PbBi alloy is different from that of pure Pb and Bi, which linearly increases with temperature increasing. The resistivities of four compositions depend linearly on temperature and the resistivity-temperature gradient a keeps basically a constant below the transition temperature T_t.
    在所测的温度范围内,与液态纯Pb和Bi的电阻率随着温度的升高线性增加的规律不同:四种成分液态合金的电阻率在某一温度TT之前与温度呈线性关系,电阻率温度斜率α与温度无关;
    The stiffness coefficient of friction resistance along the pile ksli and ks2i take the value form gradient of at stage of elastic and elastic-plastic.
    桩侧摩阻的刚度系数ks1i与ks2i的大小分别取值于弹性段与弹塑性段的斜率
    Certainly,in the data handling we can also use the gradient method which used for determining SIF from isochromatic fringes.
    当然在数据处理中也可类似于光弹性方法用斜率法来得到 K_I。
    the probability curve based on thin section size analysis is almost totally composed of saltation population with high gradient which indicates high sorting index.
    薄片粒度测量作出的概率图几乎全为跳跃总体,其斜率高,分选较好。
    The problem of accurate positioning for position control systems is explored in this paper. Particular solution formulae of multi-grade deceleration broken line, six complete properties, the maximum number of deceleration grade for position control systems and equations of the gradient of each broken line segment which minimizes the deceleration time are proposed. An experimental example of position control systems is also given.
    本文探讨了位置控制系统的准确定位问题,给出了多级减速折线的特解公式、六个完备的性质、位置控制系统的最大减速级数和使减速时间最小的各折线段斜率的方程式,同时也给出了一个位置控制系统的试验实例。
    It is that for various stress Lode's θ_v(equivalent to various rotation angles of the principal stress directions) the stressstrain behaviour can be fitted by hyperbolic curve but could not be normalized, i. e. the initial tangential gradient and the ultimate stress of the curve are various.
    试验资料表明,不同应力洛德角θ_σ(相应于不同主应力方向偏转角θ_α)其应力应变关系可用双曲线拟合,但不能归一化,即初始切线斜率和极限应力不同。
 

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