查询词典 selectivity

Conversion and selectivity of catalytic reactions as well as the deactivation rate of the catalyst itself is very temperature-sensitive.

催化反应的转化率和选择性以及催化剂本身的失活速率均对温度十分敏感。

T. , the isolated yield reached to 92% and the selectivity was above 99%. The product was immiscible with TSILs and could be separated simply by decantation after the reaction.

由于生成的乙酸苄酯不溶于催化体系，反应产物与催化体系分层，通过简单的倾析便可实现产物分离，简化了分离过程。

To improve dehydrogenate catalyst activity and the overall yield,enhancing reaction selectivity and stability of the catalyst is the sticking point of industrial application in cyclohexanone dehydrogenate condensation process.

文章分析了国内外生产情况，介绍了国内主要生产装置，详述了邻苯基苯酚广泛的市场用途，提出了我国要发展邻苯基苯酚工业，开发选择性高、活性时间长的催化剂是发展方向。

These leds light sources are not only adjustment and uniformity but also smaller , less expensive , required less power , generated less heat . especially , the pattern of the construct both aggregate and desegregate in design was to realize different light intensity illumination on same biology sample at the same time . the selectivity , work efficiency and experiment veracity have been improve greatly

该系列光源除了具备光强可调、分布均匀优势外，还具有波长、波峰宽适宜，以及小巧、价廉、能耗低、发热少等特点，尤其是该生物光源在设计时采用的单元组装模式，使得不同强度的光照能够在同一批生物样品上实现，大大拓宽了生物实验的可选择性，提高了工作效率和实验准确性。

The main achievement is as following: Present a new software structure with insert mode based on diagram and data platform. With this structure the software can be used in various voltage levels of power networks by switching function groupware with corresponding edition. Therefore it is important to solve software universality and developability.(2) Present a new idea that any operating condition is combination of running mode of plant or station, power supply topological and rules of equipment maintenance. This idea is very useful at simplifying setup and choice of operating conditions and ensuring calculation result correction.(3) Present a new idea of protection setting examination and rectification. Protection setting examination is used to examine the selectivity、 sensitivity and speed under certain operating condition, and pass an opinion whether these settings are wrong;Setting rectification is used to calculate new relay settings when error is found in setting examination.(4) Point out that interaction design is the key step in developing power system application software,which can secure usability.

主要成果有：(1)提出了以图形/数据平台为基础的插件式软件结构，通过配置不同版本的功能插件即可应用于不同特点的电网，对解决软件的通用性和可发展性具有重要意义；(2)提出了基于厂站方式、供电方式和检修规律相组合的运行方式分解方法，它能有效提高运行方式选择的合理性与全面性，使定值计算的正确性得到保障；(3)提出了保护定值校正的思想并进行了软件实现，它能检测当前保护定值在选择性、灵敏性、快速性等方面是否适合当前的运行方式，并对不正确的定值进行纠正；(4)指出交互设计应作为电力系统应用软件开发中的一个关键步骤，目的是保证软件的可用性，并对软件开发的过程进行了总结，提出了许多有益的实践经验。

The factors which influence holography diffraction efficiency, the angle selectivity of volume holography and wavelength bandwidth are analyzed with the coupled wave theory.

利用耦合波理论分析了影响体积全息图的衍射效率的因素、体积全息图的角度选择性以及波长带宽等方面。

The catalytic activity of this new resin catalyst in the isobutene oligomerization was measured in detail, it exhibited good catalytic activity and excellent isobutene dimerization selectivity.

在异丁烯的低聚反应中，对这种新型树脂催化剂的催化活性进行了细致的研究，磺化聚醚碸酮树脂催化剂在反应中表现出了很好的催化活性和优良的二聚选择性。

The conversion of methanol is higher than 98% and the selectivity of dimethylamine is higher than 62% at 320～340 ℃ and 1.8～2.0 MPa.

目前 ，工业上用于甲醇气相氨化制备甲胺的催化剂是具有脱水和氨化作用的酸性催化剂，如γ-Al2 O3、硅酸铝、氧化钍等。

But larger amount of Ni in the catalysts could cause the adsorption of dimethylamine in the state to break N-C bond to lead the disproportionation of dimethylamine and lower the selectivity of the catalysts.

但加入Ni量较大时会使二甲胺在催化剂表面有涉及N-C断裂的吸附状态，从而催化二甲胺的歧化，使催化剂的选择性下降。

The reaction conversion and selectivity can be increased effectively by using multi-stage hydrogenation process and controlling H 2/ diolefin s molar ratio.

以该催化剂为基础开发的长链双烯多段选择性加氢工艺，在很宽的温度、压力、空速范围内都可达到很好的结果，严格控制氢气与双烯烃摩尔比，可有效提高反应的转化率和选择

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。