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The first asymmetric total synthesis of coumarinolignoids Daphneticin and it's enantiomer was accomplished starting from 7-hydroxycoumarin and 3, 4, 5-trimethoxybenzaldehyde, in which Sharpless asymmetric dihydroxy reaction was used to construct chiral center, and Mitsunobu reaction was used to obtain desired configuration.

并以7-羟基香豆素和3，4，5-三甲氧基苯甲醛为起始原料，用Sharpless不对称双羟化反应构筑手性中心，用Mitsunobu偶联反应作为关键步骤，合成了手性的香豆素木脂素Daphneticin及其异构体。

Many methods are used to solve nonlinear problems, their rate of convergence is quick, for example, Newton-moser method, King-werner method, they are attentioned widely because of the quick rate of convergence. While these methods are used to solve singular problems, the rate of convergence is slow, it is discommodious for us to solve practical problems.

有许多方法在求解非奇异问题时，它们的收敛率是很快的，有些甚至能达到二次收敛，例如Newton-Moser法、King-werner法，这是所熟知的，因其收敛速度快，并且简单易用而广受重(来源：AB17C论文dddd网www.abclunwen.com)视。

Use D4 or DMC, Divinyl tetramethyl disiloxane, Tetravinyl tetramethyl cyelo tetrasiloxane were used as raw materials and Tetramethyl ammonium hydroxide as catalyst to synthesize a high molecular weight of vinyl silicone oil. Concentrate hydrosilicone oil, tetramethyl dihydro disiloxane, hexamethyldisiloxane and D4 were used to synthesize the cross linker of low-hydro silicone oil required in experiments.

以D4或DMC，乙烯基双封头，乙烯基环体等为原料，四甲基氢氧化铵为催化剂合成了不同摩尔质量的乙烯基硅油；以高含氢硅油，含氢双封头，六甲基二硅氧烷，D4合成实验所需的交联剂低含氢硅油。

Methods The Siemens linear accelerator model of Primus M was used to produce electron, and the 6 dual fields technique which was primarily used by Stanford University School of Medicine was adopted to measure multifarious dosimetric characteristics.

在西门子直线加速器上，采用Stanford大学医学院建立的双机架多照射野方法，利用CMS公司的Dynascan三维水箱和PTW剂量仪及KODAK公司的XV2胶片等设备，分别测量各项剂量学特性的指标。

Methods: Random single blind method was used in clinical study to observe the clinical effect of YZD and compared with that of Ritalin. The dysmnesia model animal was used to observe the effect of YZD on learning memory function and cerebral monoamine neurotransmitter content.

临床研究采用单盲法随机观察益智丹与利他林的临床疗效；实验研究制作记忆障碍模型，观察益智丹对小鼠学习记忆功能和对小鼠脑组织单胺类神经递质含量的影响。

The cleavation rates and blastocyst development rates of cloned embryos were used to assess the efficiency of different operational procedure. Finally, the best combination of operational procedure, that the spindle-viewer system was used for oocytes enucleating, and donor cell was electrofused into ooplasm by electrical pulse (1.9 kV/cm, 10 ms, two) to reconstruct bovine cloned embryos.

以核移植胚胎的卵裂率、囊胚发育率作为检测指标，对不同的方法所获得的克隆胚胎的卵分裂率与囊胚发育率进行比较，最后筛选获得1个优化的牛体细胞核移植操作程序，即采用Spindle view系统对牛卵母细胞进行去核操作，将供核体细胞注射到卵周隙，然后通过电融合法将供体核引入去核卵细胞质(电融合参数为1.9 kV/cm，脉冲时程10 ms，方波2次间隔2 s)。

Water was used to elute foreign matter, and then 30% ethanol was used to elute SPC, whose content was 96.01% and the yield was 3.76%.

黑龙江产高粱原花青素的分离鉴定和结构表征 2.1 SPC的初步结构分析采用UV、IR、MS等现代分析技术对SPC进行了初步结构分析。

He said: Years ago my mother used to say to me, 'in this world, Elwood, you must be …she always used to call me Elwood …in this world Elwood, you must be Oh so smart, or Oh so pleasant'.

他说：&多年前，母亲曾经对我说，' Elwood ，活在这个世界上，你必须，她经常叫我 Elwood ，在这个世界上， Elwood ，你要么特别聪明，要么特别快乐。'&

This is a transition position that will be used to ensure new processes and tools get engrained in the local work processes and should be used for developmental purposes to build sales and distribution depth in the organization.

这是转变型岗位，确保新的程序和工具彻底地根植于当地的工作过程中，并用于组织中更深地发展建立销售/分销的目的。

In this paper,a new NN former has been used to combine the blur reasoning system with the eradiate function neural network.The network model can be used to export the distributing area of deposits and average high of collapsed building with forming ...

本文作者结合模糊推理系统和辐射基函数网络，提出了建立多层前向神经网络模型，来输出倒塌房屋堆积物分布范围及平均高度的模糊预测系统。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。