升温淋洗分级 - 《中国大百科全书》第三版网络版
网页2023年10月31日 · 根据组成对可结晶性聚合物的结晶能力和溶解性能的影响，按照聚合物的结晶能力进行分级的方法。 英文名称 temperature rising elution fractionation; TREF
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TREF分级原理的实质
网页升温淋洗分级技术(Temperature Rising Elution Fractionation , TREF) 是80 年代发展起来的, 它按结晶度将聚合物分级,那么它分级原理实质是什么呢?下面我们简单的从TREF操作的步骤和特点来了解它分级原理的实质: TREF 操作分为两步:第一步,聚合物的稀溶液与惰性载体(如 …
气相色谱仪柱温箱升温程序的调试方法 - 道客巴巴
网页2021年1月25日 · 在气相色谱分析中, 柱温箱的温度控制分为 2 种: 恒温控制和程序升温。毛细管色谱柱的普遍使用, 程序升温逐渐占据主要地位, 但是不同固定相的色谱柱, 升温程序不一样。相同型号色谱柱分离不同的物质, 升温程序
Influence of isothermal crystallization temperature on the temperature …
网页Temperature Rising Elution Fractionation (TREF) is effective for separating polyolefin resins according to crystallizability. A relatively low isothermal crystallization temperature is necessary to fractionate poly(1-butene) (PB-1) resin …
Preparative temperature rising elution fractionation of polyolefin ...
网页Polyolefin elastomer (POE) has very weak crystalline ability, consequently, applying the conventional preparative temperature‐rising elution fractionation (P‐TREF) to separate is challenging. Here, a unique, home‐built P‐TREF apparatus with an extensive range of temperatures from −80°C to 150°C is applied to first fractionate POE ...
网页Implied Temperature Rise (ITR) is a forward-looking temperature alignment metric for companies and portfolios. Specifically, our ITR methodology evaluates if companies and portfolios are aligned with the Paris Agreement temperature goals
求解旅行商问题的自适应升温模拟退火算法-Adaptive temperature rising …
网页针对传统模拟退火算法在求解问题时容易陷入局部最优解的情况, 本文通过设计一种自适应的升温控制 因子, 提出了一种求解旅行商问题(tsp)的自适应升温模拟退火算法, 有效地控制局部寻优达到全局寻优能力, 并证 明了改进的自适应模拟退火算法收敛性.
The research on temperature rising model and design …
网页Theoretical models of temperature assessment are important to design a product in a low-temperature field, and they can be used to predict the heating effects and optimize temperature uniformity to improve the display performance. In this paper, equations and finite element analysis model between temperature and time were built by heat transfer ...
个体大小对草鱼耐高温能力及升温过程中群体行为的影响
网页2021年5月18日 · 摘要: 为考察个体大小对升温过程中草鱼的耐高温能力和群体行为的影响, 研究以草鱼(Ctenopharyngodon idellus)幼鱼为实验对象, 结果显示: 大个体群体的个体游泳速度明显大于小个体群体(P=0.039), 个体间距离和最近邻距离显著高于小个体群体(P<0.001); 大个 …
Climate Change: Global Temperature - NOAA Climate.gov
网页2024年1月18日 · According to NOAA's 2023 Annual Climate Report the combined land and ocean temperature has increased at an average rate of 0.11° Fahrenheit (0.06° Celsius) per decade since 1850, or about 2° F in total. The rate of warming since 1982 is more than three times as fast: 0.36° F (0.20° C) per decade.
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