查询词典 methods

Methods: The two methods of nonsolvent process and solvent process were adopted to prepare oxamyl. Oxamyl was prepared in water in the first one and in acetone in the second. By the comparisons of productive cost, production purity, operation safety and equipment cost, a proper process for preparation oxamyl was adopted.

制取杀线威有两种不同方法，即非溶剂法和溶剂法，前者采用水为反应介质，后者采用丙酮为反应介质，从产品制造成本，产品纯度，操作环境的安全性以及生产设备投资等方面进行比较，确定可行的合成方法。

This paper discusses the importance of the equipments in calibration traceability chain , introduces normal calibration methods , and proposes some suggestions about standardizing test methods and unitizing criterions .

本文依据专用测试设备的特点，论述了专用测试设备在量值溯源链中的位置及作用，介绍了常用的校准方法，并结合实际工作提出了规范测试方法和统一标准规范等建议。

The interpolate algorithms of three-order NURBS curve and double three-orders NURBS surface are presented. The expressions of partial derivative and normal curvature of NURBS surface are derived by the theory of differential geometry. The geometric characteristics of different curvature area of the free-form surfaces are analyzed in detail. All these work lays a theoretical foundation for constructing the cutter location calculating model of free-form surfaces NC machining. 2 On the basis of analyzing the methods of cutter path generation, the standard of evaluating the various methods of cutter path generation is presented. The method of generating cutter path with constant scallop height is presented for the first time.

本文以提高复杂曲面多坐标数控加工精度和加工效率为目的，在对国内外研究现状进行深入分析的基础上，对数控编程中各环节的关键技术问题进行了深入研究，主要内容包括以下几方面： 1 分析了复杂曲面各种造型方法的优缺点，给出了根据各种边界条件所确定自由曲面的NURBS表示方法以及三次NURBS曲线曲面反算算法；用微分几何理论推导了NURBS曲面的偏导矢及法曲率计算表达式；对曲面不同曲率特性区域的几何特征进行了深入分析，为建立复杂曲面的数控加工刀位计算模型奠定了理论基础。

The aims of this study were to evaluate the reliability of the current methods and to derive normal population values with these methods.

本研究的目的是评估现有方法的可靠性及取得正常人应用这些方法的测量值。

Methods There were 28 patients in the study and 49 units of NPG crown and bridge were observed after one year though clinical methods and patient's questionnaires.

方法从门诊患者中选择28例，共制作修复体49单位，一年后复查通过临床检查和患者主观评价观察临床效果。

Methods We diagnosed nuchal cord by ultrasonography and measured the circuits and degree of tightness,then provided the results for the department of obstertrics to choose proper delivery methods.

目的 评价超声诊断脐绕颈在产科的临床应用方法应用超声诊断脐绕颈，根据缠绕的周及松紧度，可供临床选择恰当的分娩方式。

Methods We adopted four methods that single cpidural block anesthesia or narcotics analgesies were injected into subarachnoid space and epidural space or single narcotics was injected into subarachnoid space (group C fentanly 25μg;group D fentanly 20μg) to study analgesia birth for 130 nullipara women. The analgesia efficacy, side effect, birth time md mode,postpartum haemorrhage and the condition of the fetus and the newborn were compared.

采用单纯硬膜外腔阻滞、蛛网膜下腔-硬膜外腔联合给予低浓度麻醉药及镇痛药、单纯蛛网膜下腔给予低浓度镇痛药(C组芬太尼25μg，D组芬太尼20μg)等四种不同的方法对130例初产妇进行分娩镇痛，比较几组的镇痛效果、不良反应及对产程、分娩方式、产后出血、胎儿及新生儿等的影响，并与40例正常未干预组产妇比较。

Analyzing the effection of calculated results under different calculated conditions,such as different time step,relaxation coefficient,numerical methods and wall difference methods.

分析了不同的时间步长、加速系数、数值方法和壁面差分方法对计算结果的影响。

The results obtained from three different methods—the conventional numerical differentiation, the discrete wavelet transform method and the proposed continuous wavelet transform method were compared, it was demonstrated that the results are similar for signals without noise, but the signal-to-noise ratio of the result obtained by the CWT method is improved greatly comparing with the former two methods for noisy signals.

通过数值微分法、离散小波变换法及连续小波变换法对模拟信号的求导结果表明：对于无噪音的信号，三种方法的结果相似，而对于含有噪音的信号，连续小波变换法所得结果的信噪比明显高于前两种方法。

On the other hand, by using recent numerical methods, a series of effective numerical methods to analyze magneto-electro-elastic solid problems can be also developed, which is applied to analyze the piezoelectric multi-layered composite plates etc.

另一方面，利用已有的优秀的数值方法，建立一系列有效的电磁弹性固体以及压电层合板等问题分析的数值方法。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。