نتایج جستجو برای: mto reaction
تعداد نتایج: 412775 فیلتر نتایج به سال:
الفین¬های سبک نظیر اتیلن، پروپیلن و بوتیلن خوراک اصلی صنعت پتروشیمی است و عمدتا از منابع نفتی تولید می شود. با توجه به رشد نیاز صنعت به الفین¬های سبک و کمبود منابع نفتی در آینده، فرآیند تبدیل متانول به الفین¬ها (mto) با استفاده از منبعی غیر¬نفتی به عنوان روشی جایگزین مورد توجه قرار گرفته است. در این پایان¬نامه برای بررسی اثر پارامترهای دما و زمان تبلور، در سنتز کاتالیست sapo-34 ، به تعداد 9 نمو...
Manufacturing companies want to implement the make-to-order (MTO) strategy to be more flexible and responsive to the volatility of demand and product variability. However, the make-to-stock (MTS) approach is an appealing concept due to its desirable performance properties: high capacity utilization, high availability and short lead times. This paper aims to define a methodology that combines th...
The synthesis of stereoisomers of acuminatolide is rare and requires complex and time-consuming multistep procedures. Asarinin (1) and sesamin (2), two diasteromeric tetrahydrofurofuran lignans, are efficiently mono-dearylated by methyltrioxorhenium (MTO, I) and hydrogen peroxide (H2O2) or urea hydrogen peroxide adduct (UHP) as primary oxidant to give (-)-(7R,8'R,8R)-acuminatolide (3A) and (+)-...
The Moving to Opportunity (MTO) demonstration assigned housing vouchers via random lottery to public housing residents in five cities. We use the exogenous variation in residential locations generated by MTO to estimate neighborhood effects on youth crime and delinquency. The offer to relocate to lower-poverty areas reduces arrests among female youth for violent and property crimes, relative to...
A CON-type zeolite underwent bead-milling, recrystallisation and defect-healing treatments to yield highly crystalline nanoparticles, showing prolonged lifetime in MTO reactions.
Multi-scale topology optimization (a.k.a. micro-structural optimization, MTO) consists in optimizing macro-scale and micro-scale simultaneously. MTO could improve structural performance of products significantly. However, a few issues related to connectivity between micro-structures high computational cost have be addressed, without resulting loss performance. In this paper, new efficient multi...
چکیده ندارد.
Multi-task optimization (MTO) is a novel emerging evolutionary computation paradigm. It focuses on solving multiple tasks concurrently while improving performance by utilizing similarities among and historical knowledge. To ensure its high performance, it important to choose proper individuals for each task. Most MTO algorithms limit individual one task, which weakens the effects of information...
During the past 20 years, social scientists using observational studies have generated a large and inconclusive literature on neighborhood effects. Recent workers have argued that estimates of neighborhood effects based on randomized studies of housing mobility, such as the “Moving to Opportunity” (MTO) demonstration, are more credible. These estimates are based on the implicit assumption of no...
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