查询词典 thermal stability

Study result suggest: The change of stock in RFCCU directly affect gasoline content. Gasoline content can be reduced through increasing the equilibrium activity of catalyst, controlling reaction level, increasing recirculating rate of gasoline and stability of gasoline level. Conclusions drawn from experiment is that optimization of operating condition has great effect on lowering olefine content of gasoline which can be reduced from 60% to 50%.Reducing reaction temperature is useful for lowering olefine content of gasoline, when the reaction temperature is raised, thermal cracking rate is higher than catalytic cracking rate, so that olefine content is increased. Raising catalyst-to-oil ratio is good for lowering olefine content. With conversion rate increased, the yield of LPG and coke is raised, the yield of gasoline is increased firstly and then decreased slightly, hydrogen transfer index is increased, so the olefine content is decreased.

研究结果表明：催化裂化装置的原料的变化直接影响到催化汽油的烯烃含量；可以通过优化催化装置的操作条件来降低催化汽油中的烯烃含量，其中通过提高催化剂平衡活性、控制反应深度、增加汽油回炼量、汽油深度稳定可以降低催化汽油烯烃含量，优化工艺条件对降低催化汽油烯烃含量有较大作用，汽油烯烃含量由60％降至50％左右；降低反应温度有利于降低催化汽油的烯烃含量，当反应温度的提高，热裂化反应速度提高的幅度大于催化裂化反应速度提高的幅度，汽油烯烃含量增加；剂油比的提高有利于降低催化汽油的烯烃含量，转化率提高，液化气产率提高，汽油收率先增加后略有下降，焦炭产率增加，氢转移反应指数提高，汽油烯烃含量下降；反应时间对产品分布及汽油烯烃含量有影响，增加提升管反应时间，液化汽、汽油产率提高，干气和焦炭产率增加。

ABSTRACT: Silicoaluminophosphate molecular sieves are microporous crystals with the structure of SiO2、AlO2－、PO2+ tetrahedral units.The physical—chemical properties of SAPO are not only similar to silicoalumino zeolites but also similar to some aluminophosphate zeolites.SAPO is a novel class of catalytic materials which exhibit excellent shape—selectivity、thermal and hydrothermal stability.

摘 要：磷酸硅铝分子筛是由SiO2、AlO2－、PO2＋三种四面体单元构成的微孔型晶体，它的物化性质不仅类似于硅铝沸石，同时具有某些铝磷酸盐分子筛的特性，是一种具有优异的择形选择性以及热稳定性和湿热稳定性的新催化材料。

The construction of Qinghai-Tibet railway has greatly changed thermal and mechanical conditions in its underlain frozen soil and accelerated the degeneration of frozen soil.Then,lots of warm frozen soil,which mechanical stability is unstable,will be formed in the foundation.

青藏铁路的修建，彻底改变了路基下伏土体的热力学状态，加速了多年冻土的退化，导致铁路地基土中产生大片的、力学性质极不稳定的高温冻土层，从而影响铁路路基的结构稳定性。

This dissertation presents the effects of formation potential range, heat treatment, and the thermal additive, vinylene carbonate, on the formation and stability of SEI by electron spectroscopy for chemical analysis, fourier transform infrared spectroscopy, differential scanning calorimetry, nuclear magnetic resonance, AC impedance, and certain standard electrochemical techniques.

因此，本论文从三方面著手，分别探讨化成程序的电位范围、热处理、以及热添加剂乙烯碳酸酯（vinylene carbonate；VC）对此钝化层造成的影响。所采用的分析工具包括X光线电子光谱、富利叶红外光谱、差分扫瞄式卡计、核磁共振光谱、交流阻抗频谱及一些标准的电化学分析技术。

Hot-Melt Laminating Machine is to laminate two or more different materialstogether through thermal radiation;meanwhile,apply appropriate pressure to make them become one composite.It has high adaptability and stability adn is widely used for laminating cloth leather,shoes soles and foaming sheets.lt use PE pellicle to replace glue which makes stronger effect and longer time for products stock,no discolouring,not easy to tear apart.This machine combines with the actiyator and automatic temperature circuit,which allows thick and thin laminating.accurate control of production quantity and quality,and is able to count amounts.Modern structure.stable performance,simple operation,low faulty rate and long operating life make it a fabulous machine

热熔复合机是通过热辐射对塑料、片材进行热熔贴合处理，把两种或两种以上不同材料相结合并施加一定压力使这复合成一体的加工机器，多用于服装皮革，鞋底鞋材，轻泡片材的复合加工，其优点用于PE薄膜替代胶水贴合，产品时间库存长，无变色迹象，不易撕开，贴合效果强于胶水几倍，具有广泛的适应性和稳定性，本机结合调速电机，自动温控电路，可方便准确的控制生产量和复合质量、可计数计码，是理想的复合设备，该机具有结构新颖，性能稳定，操作简单，故障率低，使用寿命长等诸多优点，我公司该产品设计有三种规格，用户可根据具体生产情况选购，如有需要可定做其它特殊规格的品种。

Compared to traditional incising method, this method has advantages of precise thermal and good curative effect, secure and easy to operate. This paper wants to test the stability of the system and modify the therapy parameter in order to instruct the experiment later through the finite element analysis and experiment study.

本文主要分为有限元计算分析和实验研究两方面的研究工作，通过这些测试，达到验证仪器的稳定性，修正治疗参数，从而进一步指导下阶段的实验的目的，本文研究成果对于处于研发初期的射频消融治疗仪具有重要的意义。

The thermal shock stability of SiO2 breeze bonded magnesium casting material has been studied using the blast cold method by means of XRD, EDA and SEM.

采用风冷法并借助于XRD、EDA、SEM对SiO2微粉结合镁质浇注料的热震稳定性能进行了研究。

The design of the leads unit, low thermal resistance and high electrical isolation heat intercept connection, stability of HTS current leads, optimum design of conduction cooled current leads is analyzed in detail.

对引线单元的结构设计、引线的导热绝缘冷却结构、稳定性等问题，以及传导冷却的铜电流引线优化设计进行了详细分析和计算。

Daniel Science's products include testing equipment simulating climatic environment and scientific instrument for labs and production equipment, main products include programmable constant temperature humidity chamber , programmable high-low temperature chamber, high temperature test chamber ,aging oven, thermal shock test chamber, salt mist canker chamber,thermostatic bath,low constant temperature circulator,drying cabinet, muffle furnace, moisture-proof box ,incubator, exposure test chamber ,drug stability test chamber, instruments simulating environment temperature and humidity required by academic research institutes,testing units, production of enterprises.

得益尔科学的产品包括模拟气候环境的试验设备和实验室科学仪器及生产设备，主要产品包括可程序恒温恒湿试验箱、可程序高低温试验箱、高温试验箱、老化试验箱、温度冲击试验箱、盐雾腐蚀试验箱、恒温槽、低温恒温循环器、干燥箱、马弗炉、防潮箱、培养箱、光照培养箱、药品稳定性试验箱等仪器设备，提供学术研究机构，检测单位，企业生产所需模拟环境温度和湿度等环境因素的仪器。

However the different alkali metal azides RN3 show different reactivity with β-MNCl, and the properties of the products such as superconducting fractions, the lattice constant, and stability against thermal or air, are very dependent on the kinds of alkali metals used.

但是，不同的碱金属叠氮化物具有不同的可反应性，其反应产物也具有不同的性质，例如超导体积百分率、晶格常数、热稳定性和在空气中的稳定性等都和碱金属离子有关。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。