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To be successful, a crucial selectivity problem in the conversion of aldehyde 4 to aldol 3 had to be understood and solved.

要取得成功，关键选择性问题转化为乙醛醛34已被理解和解决。

The content of this course includes: fundamentals of logic algebra analysis and design of the combinational logic circuit and sequence circuit common applications of the combinational logic circuit and sequence circuit programmable logic devices Hardware Design Description Language A/D (Analog/Digital) and D/A conversion.

课程的主要内容有：逻辑代数基础、组合逻辑电路及时序电路分析与设计、常用中规模组合逻辑及时序逻辑电路应用、可编程逻辑器件、硬件设计描述语言VHDL、数模、模数转换等。

Therefore, the study on bifunctional catalysts and their application in alkane conversion is necessary.

因此，对催化烃转化反应的双功能催化剂的研究就显得十分重要。

The catalytic partial oxidation process is now the main technology method for conversion of alkane in coke oven gas.

催化部分氧化工艺是目前焦炉煤气烷烃转化的主要技术手段。

Before regeneration, 160 kg LAB product/kg catalyst can be obtained with over 98% of alkene conversion.

研究还表明，在Y型分子筛中引入Sr~(2+)后能增强分子筛对苯的吸附能力，在反应温度下使苯仍能维持活化吸附状态。

Supercritical conditions can enhance the conversion of isooctane but lower the alkene selectivity simultaneously.

超临界条件与常压相比能提高异辛烷的转化率，但同时使烯烃选择性降低。

This paper mainly studies the effect of pressure, LHSV, temperature and mole ratio of alcohol and alkene on conversion ratio of tertiary amylene.

本文主要考察和研究了反应压力、空速、反应温度、醇烯摩尔比对叔戊烯转化率的影响。

An 89C2051 microprocessor was used to realize the phase order conversion of the step motor so that the Loop allotter circuit is easy and flexible. The VMOS is adopted as power elements of the design.

该步进电机驱动电路选择硬件环形分配，选择89C2051作为环形分配器，这种环行分配电路具有电路简单，可靠性高，柔性好的特点。

The system breakdown voltage measurement and signal output two most voltage measurement part in the main circuit simulation, tie amplifier module, A / D conversion module, module; Sunplus microprocessor through data processing, in the range of allowable error voltage measurements show, and broadcast voice.

本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值，并播报语音。

It is possible to achieve the conversion of allyl chloride and selectivity for epichiorohydrin as high as 99% on Ti-MWW.

在Ti-MWW催化剂上烯丙基氯的转化率和环氧氯丙烷的选择性都能达到99%以上。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。