نتایج جستجو برای: rock eval pyrolysis

تعداد نتایج: 51281  

Journal: :Optimization Methods & Software 2022

We propose a new class of rigorous methods for derivative-free optimization with the aim delivering efficient and robust numerical performance functions all types, from smooth to non-smooth, under different noise regimes. To this end, we have developed methods, called Full-Low Evaluation organized around two main types iterations. The first iteration type (called Full-Eval) is expensive in func...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1975
J Leventhal S E Suess P Cloud

Evidence of biochemical and geochemical evolution was sought in insoluble carbonaceous matter from 30 selected pre-Phanerozoic sediments ranging in age from about 3.8 to about 0.7 x 10(9) years. The carbon isotope ratios observed were in the range of -20 to -32 per mil with reference to the Peedee belemnite standard, similar to those previously reported. No systematic trends are obvious to us. ...

Journal: :Proceedings of the ACM on programming languages 2021

Most dynamic languages allow users to turn text into code using various functions, often named <tt>eval</tt>, with language-dependent semantics. The widespread use of these reflective functions hinders static analysis and prevents compilers from performing optimizations. This paper aims provide a better sense why programmers <tt>eval</tt>. Understanding <tt>eval&lt...

2010
Matthew L. Hill Gang Hua Apostol Natsev John R. Smith Lexing Xie Bert Huang Michele Merler Hua Ouyang Mingyuan Zhou

In this paper, we describe the system jointly developed by IBM Research and Columbia University for video copy detection and multimedia event detection applied to the TRECVID-2010 video retrieval benchmark. A. Content-Based Copy Detection: The focus of our copy detection system this year was fusing three types of complementary fingerprints: a keyframe-based color correlogram, SIFTogram (bag of ...

Journal: :The depositional record 2021

This study describes an integrated workflow designed to quantify detrital input into lacustrine deposits in terms of regional extent and total organic carbon content. includes (a) geochemical data such as Rock Eval palynofacies (b) palaeogeographical maps. was applied the immature Barremian source rocks from Lower Congo Basin because a large available set describing complex sedimentary record. ...

Journal: :مهندسی بیوسیستم ایران 0
احمد پیری دانشجوی دکتری مکانیک بیوسیستم- دانشگاه ارومیه علی محمدنیکبخت دانشیار گروه مهندسی مکانیک بیوسیستم- دانشگاه ارومیه

the purposes of this article are studying the effects of oxygen presence on waste wood pyrolysis process in order to produce bio-char. to reach the goal, cubic samples of size 2.5 cm pyrolized at 300 and 400 °c. the surface and center temperatures of samples were measured and their mass losses were calculated from the ratio of pyrolized mass to initial mass of the sample. increase in temperatur...

Journal: :Pedosphere 2022

Soil organic matter (SOM) is a complex heterogeneous mixture formed through decomposition and organo-mineral interactions, characterization of its composition biogeochemical stability challenging. From this perspective, Rock-Eval® rapid efficient thermal analytical method that combines the quantitative qualitative information SOM, including several parameters related to stability. This approach...

Journal: :Bioresource technology 2013
Wu-Jun Liu Ke Tian Hong Jiang Xue-Song Zhang Guang-Xi Yang

The co-pyrolysis of waste electrical and electronic equipments (WEEEs) and waste biomass to obtain pyrolysis-oil, a liquid fuel or chemical feedstock, was carried out in the present work. The pyrolysis-oil yield of co-pyrolysis reached 62.3% which was significantly higher than those of pyrolysis of WEEEs and biomass alone (i.e., 53.1% for WEEEs and 46.3% for biomass), suggesting that synergisti...

2010
Rui Lou Shu-bin Wu

The characteristics of enzymatic/mild acidolysis lignin (EMAL) isolated from moso bamboo were investigated using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Pyrolysis temperature as a factor on products was studied, and the pyrolysis mechanism was inferred with respect to the dominating products. Research results showed that pyrolysis products derived from EMAL pyrolysis were mai...

2000
James O. Finckenauer

Despite their impor tance in assess ing the impact of pol i cies, out come eval u a tions—and in par tic u lar ran dom ized exper i ments—are rel a tively rare. The ratio nal iza tions used to jus tify the absence of out come eval u a tions include such asser tions as “we know our pro grams are work ing,” “they can’t pos si bly harm any one,” and “if they only help one kid they’re worth it.” Us...

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