查询词典 direct method

This dissertation deals with the synthetic method of benzotellurazoles containing various substituents in benzene nuclei: introducing tellurium atom to the acetanilide derivatives in ortho-position by direct or indirect ways, then reduced and cyclized to give substituted benzotellurazoles directly or indirectly.

本文系统研究了含各类取代基的苯并碲唑杂环的合成方法，即向原料中用四氯化碲以直接或间接定位的方法引入碲，再经过直接或间接还原关环法制备苯并碲唑。

Method］from may 2000 to november 2007,14 patients(10 females,4 males;mean age 34.6 years)with scapular fractures were treated by open reduction and internal fixation through a posterior approach.eight patients were injurred in traffic accidents,3 due to falling,2 by direct violence and 1 due to cut.there were eleven patients with close fractures and 3 with open fractures.according to hardegger classification system,there were 8 cases of scapular body fracture,9 of scapular spine fracture,6 of scapular acromion,10 of scapular neck fracture,6 of glenoid rim fracture and 4 of glenoid fossa fracture.

车祸伤8例，高处坠落伤3例，直接暴力伤2例，刀砍伤1例。闭合性骨折11例，开放性骨折3例。根据hardegger的分型方法，体部骨折8处，肩胛冈骨折9处，肩峰骨折6处，肩胛颈骨折10处，盂缘骨折6处，盂窝骨折4处。其中混合型骨折10例，合并全身多发伤5例；伴有腋神经损伤1例，肩胛上神经损伤2例。通过后入路手术，对不同类型的肩胛骨骨折使用重建钢板或拉力螺钉和钢丝等固定。［结果］14例患者获得随访，随访时间6个月～3年，平均18个月。

To establish a method for the direct determination of methyl methacrylate and butyl acrylate in the air of workplace by gas chromatography.

目的 建立工作场所空气中甲基丙烯酸甲酯和丙烯酸正丁酯气相色谱直接测定的方法。

A new method for the direct synthesis of α-acyl methylenetriphenyl-arsoranes from readily available arsonium salts was afforded.

提供了一个由α-位具有强吸电子取代基的鉮盐一步合成α-酰基胂叶立德的新方法。

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

Aim To build up a thermo-economics diagnostic method of direct air-cooled devices.

目的 建立直接空冷装置运行经济性的诊断方法。

Compared with traditional numerical methods, the LB method has several important features, including: simplicity in algorithm, easily programming, direct calculation of pressure from a state equation and amenability to simulate all kinds of flow field with complex boundaries, it also has many advantages in the respect of parallel computation because of its regional evolution.

与传统的计算方法相比较，LB方法具有算法简单、编程容易、压力可以通过状态方程直接求解、能够模拟各种复杂边界的流场等优点，并且计算的局域性使其在并行计算方面也具有很大的优势。

Compared with traditional numerical methods such as the FEM, FDM, etc, the LB method has several important features, including: simplicity in algorithm, easily programming, direct calculation of pressure from a state equation and amenability to simulate all kinds of flow field with complex boundaries, it also has much advantage in the respect of parallel computation because of its regional evolution.

与传统的计算方法如FEM、FDM等相比，LB方法具有算法简单、编程容易、压力可以通过状态方程直接求解、能够模拟各种复杂边界的流场等优点，并且计算的局域性使其在并行计算方面也具有很大的优势。

This paper advances the preparation method of erucamide by direct ammonolysis .

本研究提出菜籽油直接氨解、溶剂脱脂、蒸馏预分离、溶剂结晶提纯制取芥酸酰胺的方法。

Then using 3,4,5-trichlorobenzotrifluoride as starting material to prepare 2,6-dichloro-4-trifluoromethylaniline through three routines, The direct ammonolysis method may realize the maximum use of the atom and it meets the modern green chemistry requirement. But the reaction must carry on under the high temperature and high pressure condition, and side reaction had occurred, the conversion was high, but the yield of the product was only 68%.

直接氨解法可以实现原子的最大利用率，符合现代绿色化学原子经济性要求，但是反应需在高温高压条件下进行，且有副反应发生，原料转化率高，但所需产品的收率只有68%。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。