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the first derivative
相关语句
  一阶导数
     In 0.1 mol/L KCl 1×10 -4 mol/L CTMAB supporting electrolyte, the first derivative peak current of the NCDL reduction wave is linearly proportional to its concentration in the range of 1×10 -6 ~6×10 -5 mol/L, r = 0.996 ( n =7).
     在浓度为 0 .1 mol/L- KCl- 1× 1 0 -4 mol/L的 CTMAB支持电解质溶液中 ,NCDL的一阶导数还原波 ,峰高与其浓度在 1× 1 0 -6~ 6× 1 0 -5 mol/L范围内呈线性关系 ,相关系数为 0 .996 ( n=7)。
短句来源
     The most suitable wavelengths correlated with chlorogenic acid content were 294 nm (r=0.991 9, n=28) in the original UV spectrum and 316 nm(r=0.995 9, n=28)in the first derivative spectrum respectively.
     UV原始光谱中最佳波长为294nm(r=0·9919,n=28); 一阶导数光谱中最佳波长为316nm(r=0·9959,n=28)。
短句来源
     The determination wavelengths of the first derivative spectrophotometry are ( + )204. 5 and (-)233. 5 nm.
     一阶导数光谱测定波长为(+)204.5nm和(-)233.5nm。
短句来源
     Determination of fleroxacin in its preparations by the first derivative spectrophotometry
     一阶导数分光光度法测定几种制剂中氟罗沙星
短句来源
     The method offers theadvantages of factor analysis and derivativespectrophotometry. The first derivative mo-lar absorptivities of Ni,Cu and Zn are 3.8×10 ̄5,2.7 × 10 ̄5 and 5.5 × 10 ̄5L, mol ̄(-1)·cm ̄(-1),respectively,and are 5.8,7.1 and 5.7 timesthose by conventional spectrophotometry re-spectively.
     用PAR作显色剂,三种离子在一阶导数光谱最大吸收波长处的摩尔吸光系数分别为3.8×10 ̄5,2.7×10 ̄5和5.5×10 ̄5L·mol ̄(-1)·cm ̄(-1)比基本光谱最大吸收波长处的摩尔吸光系数分别提高5.8、7.1和5.7倍。
短句来源
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  采用一阶导数
     Methods:The first derivative spectra methods were selected,the sulfamethoxazole was determined at 258.8nm and the trimethorim was determined at 238.2nm.
     方法:采用一阶导数光谱法测定,磺胺甲噁唑的测定波长为258.8nm,甲氧苄啶的测定波长为238.2nm。
短句来源
     The resultsindicated that the calibration models developed by the spectral data pretreatment of the first derivative + multivariatescattering correction within the spectral region of 10000-4000 cm-1, and the first derivative + straight line subtraction in9000-4000 cm-1 were the best for protein and starch, respectively.
     结果表明,采用一阶导数+多元散射校正预处理、谱区为10000~4000cm-1和一阶导数+直线扣减预处理、谱区为9000~4000cm-1,分别建立的蛋白质、淀粉含量的校正模型,其校正和预测效果最佳。
短句来源
     【Result】 The optimal model was developed by the spectral data pretreatment of the first derivative + vector normalization in 11 998.9 cm-1-5 449.8 cm-1 and 4 601.3 cm-1-4 246.5 cm-1,by analyzing different spectral data pretreatment and light frequency ranges.
     结果通过比较光谱预处理方法在不同谱区的处理效果:采用一阶导数+矢量标准化预处理、谱区为11998.9cm-1~5449.8cm-1和4601.3cm-1~4246.5cm-1建立校正模型的检验和预测效果最佳,糙米蛋白质的近红外测定值和化学测定值之间有较高的相关性和较低的误差;
短句来源
     METHOD Tretinoin was determined by the first derivative spectrophotometry at 378nm.
     方法 采用一阶导数光谱法在 3 78nm处测定维甲酸的含量。
短句来源
     The results showed that the calibration models developed by the spectral data pretreatment of the first derivative+vector normalization, and the first derivative+multivariate scattering correction were the best for NDF and ADF with the same spectral regions (7 501 7 5 449 8 cm -1 and 4 601 3 4 246 5 cm -1 ).
     结果表明,采用一阶导数+矢量归一化预处理和一阶导数+多元散射校正预处理,谱区均为7502~5450cm-1和4601~4247cm-1,所建立的NDF与ADF校正模型,其校正和预测效果最佳。
短句来源
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  一次微商
     Artificial Neural Networks and the First Derivative Method Applied to Potentiometric Titration1
     BP网络拟合电位滴定曲线用其一次微商确定滴定终点
短句来源
     The first derivative of H—ρ curve obtained with inversion is made to get extremums, which are the intersecting points of asymptotes.
     对反演后得到的深度一电阻率曲线进行一次微商,其极值点就是渐近线交点的位置。
短句来源
     A new indirect method of linewidth measurement was proposed, by which the linewidths and pressure broadening coefficients of spectral lines can be derived from the dependence of the peak-to-peak amplitudes of the first derivative curve of the absorption lines on the pressures.
     提出了利用吸收谱线的一次微商线型的峰峰值与线宽进而与气压的关系间接测量线宽及压致增宽系数的新方法。
短句来源
  “the first derivative”译为未确定词的双语例句
     In 0.1 mol/L NaAc-HAc(pH 4. 3)-0.012 mol/L H2O2 support ing electrolyte solution, the peak height of the first derivative wave of GA is proportional to its concentration in the range of 8.0×10-7~1.0×10-5mol/L.
     在0.1mol/LNaAc-HAc(pH4.3)最佳废液中,甘草酸极谱催化波峰高与其浓度在8.0×10-7~1.0×10-5mol/L范围内有线性关系。
短句来源
     D by using the first derivative spectrum and REP, and the properest models were index(R2=0.9487)and parabola (R2=0.9392) respectively.
     D 是可行的,最适模型分别为指数(R2=0.9487)和抛物线(R2=0.9392)。
短句来源
     The first derivative peak height is directly proportional to the silicon dioxide concentration in the range of 0.02-12 μg/25 mL and the detection limit was 0.012 μg/25 mL. The relative standard deviations are 0.46%0.62% and the recoveries are 97%-105%.
     在25 mL溶液中,导数极谱波高与二氧化硅量在0.02~12μg呈线性关系,检出限为0.012μg,相对标准偏差为0.46%~0.62%,回收率为97%~105%。
短句来源
     There is a good linear relationship between CO concentration in the range of 2~10 μmol·L 1 CO and the distance D between the first derivative peak at 415 nm amd valley at 426 nm with r=0.9999(n=5),the regression equation being C (mmol·L 1 )=17.6D 0.4, the detection limit lower than 0.1 μmol·L 1 CO.
     在CO浓度2~10μmol·L1范围内与导数光谱峰(415nm)和谷(426nm)之间距离(D)呈良好线性关系,r=0.9999(n=5),回归方程C(mmol·L1)=17.6D0.4。 最低检测浓度低于0.1μmol·L1CO。
短句来源
     D by using the first derivative spectrum and REP, but also had higher precision,and the properest models were index(R~2=0.9487)and parabola (R~2=0.9392) respectively.
     D不仅是可行的,而且反演精度较高,最适模型分别为指数 R2=0.9487 和抛物线 R2=0.9392 .
短句来源
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  the first derivative
A new method to compute the first derivative of 3-D Radon transform is given for cone-beam data taken from any orbit.
      
The integral ratio method [4, 5] is employed for each of the regions where the coefficient of the first derivative does not change sign.
      
In the second and third cases, the form of the density distribution also depends on a parameter, the ratio of the first derivative along the normal of the density behind the wave to the radius of curvature of the wave.
      
The first derivative curves of these colored solutions show maximum derivative amplitudes at 465 nm (V(V)) and 540 nm (Fe(III)) obeying Beer's law in the range 0.12-2.50 μg ml-1 and 0.14-4.20 μg ml-1, respectively.
      
A copper electrode was formedin situ, and the nitrate signal was recorded as the first derivative using cathodic sweep.
      
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In order to elucidate the mechanism of hypertensive and antishock effects of Citrus aurantium L. and its active principles (synephrine and N-methyltyramine), carotid arterial blood pressure (BP), left ventricular pressure (LVP), left ventricular end diastolic pressure (LVEDP), the first derivative of the left ventricular pressure (dp/dt), central venous pressure (CVP), EGG, heart rate (HR), and cardiac output (CO) were monitored in 6 anethetized open chest dogs. The tracings were recorded on RM-86 Polygraph....

In order to elucidate the mechanism of hypertensive and antishock effects of Citrus aurantium L. and its active principles (synephrine and N-methyltyramine), carotid arterial blood pressure (BP), left ventricular pressure (LVP), left ventricular end diastolic pressure (LVEDP), the first derivative of the left ventricular pressure (dp/dt), central venous pressure (CVP), EGG, heart rate (HR), and cardiac output (CO) were monitored in 6 anethetized open chest dogs. The tracings were recorded on RM-86 Polygraph. EGG, LVP, LVEDP and dp/dt signals were recorded simultaneously on Data Recorder and were reproduced in speed of 100 mm per sec. after experiment, so as to measure the numeral value of LVEDP, t-dp/dt, tension time index of ventricular ejection (TTI) and common peak isovolumetric pressure (CPIP). Cardiac index (CI), stroke index (SI), left ventricular work index (LVWI), peripheral vascular resistance (PVR), and dp/dt/CPIP (VcEat CPIP)were calculated. Citus auruntium extract (0.5g/kg), synephrine (1 mg/kg), N-methyltyramine (0.25 mg/kg) with the well-known cardiac stimulants dopamine (DA), dobutamine (DB) as positive control were injected in sequence of Latinsquare design.All drugs markedly increased the cardiac function indices in similar patterns including increase of dp/dt max, V_(CE) at CPIP and CI; shortening of t-dp/dt max. and lowering of LVEDP. Since V_(CE) at CPIP is independent of variations of ventricular afterload initiated by these drugs, it was concluded that similar to DA and DB, crude extract of Citrus aurantiurn and its active principlcs do possess inotropic action by increasing myocardial contractility. It is their pump-stimulant action and elevation of PVR that offer the pharmacological basis to their anti shock effect. As to the relative efficiency on PVR, N-methyltyramine was weaker than crude extract of Citrus aurantiurn and synephrine. As to the heart rate stimulant action, the reverse was true.At the equivalent dosage to CI increment, crude extract of Citus aurantiurn synephrine, N-methyltyramine and hypertensive dose of DA augmented the LVWI and TTI×HR (as energy and oxygen consumption index) far beyond the ratio of CI increment. This difference could attribute to the increase of ventricular afterload as a result of vasoconstriction.DB and DA in small doses lowered arterial blood pressure and PVR. Consequently the LVWI and TTI×HR were not significantly altered.

麻醉犬实验表明枳实及其有效成分辛弗林和N-甲基酪胺与多巴胺、多巴酚丁胺相似,能显著增强多种心肌收缩性和泵血功能的指标:增大左室压变化速率峰值和在共同最高等容收缩压(CPIP)时的心肌收缩成分的缩短速率(V_(CE)),增加心脏指数(GI),缩短左室从开始收缩到开始射血的时间,降低左室舒张末压。由于在CPIP时的V_(CE)不受心室后负荷(动脉压)的影响,故可以排除上述指标的增强是由于药物对血压的影响。由于枳实及其有效成分的强心、增加心输出量和收缩血管提高总外周阻力,导致左室压力和动脉血压上升,这是它们抗休克的药理学基础。N-甲基酪胺升高外周阻力的作用比枳实和辛弗林稍弱,但加快心率的作用则较强。这两种成分在作用上是各有特点的。在增加心搏指数等效剂量下,枳实、辛弗林、N-甲基酪胺与大剂量多巴胺增加左室作功指数和射血的张力-时间指数的比值远超过增加心搏指数的百分率,这可能是升压增加左室后负荷造成的。多巴酚丁胺和小剂量多巴胺不同于枳实及其有效成分在于能降低外周血管阻力,降低动脉血压,而不明显增加左室作功指数和射血的张力-时间指数,提示不象枳实那样增加心肌的能量消耗。

In this paper the problem of cubic spline interpolation for derivative values is discussed.It is to find the interpolation function for a given set of values of an independent variable a=x_0the first derivative m_0,m_1,m_2……,m_n and the functional values of the two end points y_0,y_n.The condition of exis- tence of solution and its algorithm are given,the rounding error of the solu- tion process is analyzed and the convergence of the spline is proved.

本文讨论用三次样条函数解对导数值的插值问题:给定一组自变量值a=x_0

In this paper the problem of cubic spline interpolation for derivative values is discussed. It is to find the interpolation function for a given set of values of an independent variable a=x_0the first derivative m_o, m_1, m_2……,m_n and the functional values of the two end points y_0、y_n. The condition of existence of solution and its algorithm are given, the rounding error of the solution process is analyzed and the convergence of the spline is proved.

本文讨论用三次样条函数解对导数值的插值问题:给定一组自变量值 a=x_0

 
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