نتایج جستجو برای: scale gram

تعداد نتایج: 648010  

2005
Dominique Massonié Pascal Nocera Georges Linarès

In this paper a new computation and approximation scheme for Language Model Look-Ahead (LMLA) is introduced. The main benefit of LMLA is sharper pruning of the search space during the LVCSR decoding process. However LMLA comes with its own cost and is known to scale badly with both LM n-gram order and LM size. The proposed method tackles this problem with a divide and conquer approach which ena...

1999
Jason Davenport Richard M. Schwartz Long Nguyen

In this paper we present several algorithms that speed up our BBN BYBLOS decoder. We briefly describe the techniques that we have used before this year. Then we present new techniques that speed up the recognition search by a factor of 10 with little effect on accuracy using a combination of Fast Gaussian Computation, grammar spreading, and grammar caching, within the 2-Pass n-best paradigm. We...

2015
David D. Dawson Elizabeth R. Jarvo

In this manuscript we highlight the potential of stereospecific nickel-catalyzed cross-coupling reactions for applications in the pharmaceutical industry. Using an inexpensive and sustainable nickel catalyst, we report a gram-scale Kumada cross-coupling reaction. Reactions are highly stereospecific and proceed with inversion at the benzylic position. We also expand the scope of our reaction to ...

Journal: :Organic & biomolecular chemistry 2013
Yingguang Zhu Yian Shi

A novel and efficient Cu(I)-catalyzed oxidative homocoupling of terminal alkynes with diaziridinone as an oxidant is described. Various terminal alkynes can be transformed into the corresponding 1,3-diynes in good yields. The reaction process is base-free, operationally simple, and amenable to the gram scale.

2008
Stephan Raaijmakers Wessel Kraaij

In this paper we describe the TNO approach to large-scale polarity classification of the Blog TREC 2008 dataset. Our participation consists of the submission of the 5 baseline runs provided by NIST, for which we applied a multinomial kernel machine operating on character n-gram representations.1

Journal: :Chemical & pharmaceutical bulletin 2015
Gang Li Bao-Kun Yuan Wu Tang Hong-Yi Zhao Zi-Yun Lin Hai-Hong Huang

An improved and efficient method for the preparation of torezolid based on Suzuki cross-coupling reaction as the key step was developed on a gram scale in five steps. The total yield was 44% and the optical purity of torezolid by the improved method was above 99%.

Journal: :Journal of the American Chemical Society 2005
Manabu Hatano Takumi Ikeno Takashi Miyamoto Kazuaki Ishihara

A highly enantioselective cyanohydrin synthesis with aromatic aldehydes using chiral lithium binaphtholate aqua or alcohol complexes has been developed and is a simple and inexpensive catalyst suitable for process chemistry to give gram-scale cyanohydrins successfully. Dramatic improvements in enantiomeric excess have been realized along with an interesting changeover in absolute stereochemistr...

Journal: :Chemical communications 2013
Khokan Samanta Surajit Some Youngmin Kim Yeoheung Yoon Misook Min Sae Mi Lee Younghun Park Hyoyoung Lee

A facile method for the synthesis of highly fluorinated reduced graphene oxide from graphene oxide using BF3-OEt2 solution and alkylthiol/alkylamine on the Gram scale has been described using a detailed mechanism. The maximum fluorination was as high as 38 wt% and the fluorinated reduced graphene oxide produced has great wettability and high insulating properties.

Journal: :Chemical communications 2010
Despina J Bougioukou Adam Z Walton Jon D Stewart

Simple strategies for using alkene reductase enzymes to produce gram-scale quantities of both (R)- and (S)-citronellal have been developed. The methodology is easily accessible to non-specialist laboratories, allowing alkene reductases to be added to the toolbox of routine synthetic transformations.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید