The development of a Chinese learner corpus

Wang, Maolin; Gong, Qi; Kuang, Jie; Xiong, Zhuo

doi:10.1109/icsda.2012.6422457

Cited by 6 publications

(8 citation statements)

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“…Growing interest has led to the recent development of the Chinese Learner Corpus (Wang et al, 2012), the first large-scale corpus of learner texts comprised of essays written by university students. Learners from 59 countries are represented and proficiency levels have been sampled representatively across beginners, intermediate and advanced learners.…”

Section: Datamentioning

confidence: 99%

Chinese Native Language Identification

Malmasi¹,

Dras²

2014

Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics, Volume 2: Short Pa

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We present the first application of Native Language Identification (NLI) to nonEnglish data. Motivated by theories of language transfer, NLI is the task of identifying a writer's native language (L1) based on their writings in a second language (the L2). An NLI system was applied to Chinese learner texts using topicindependent syntactic models to assess their accuracy. We find that models using part-of-speech tags, context-free grammar production rules and function words are highly effective, achieving a maximum accuracy of 71% . Interestingly, we also find that when applied to equivalent English data, the model performance is almost identical. This finding suggests a systematic pattern of cross-linguistic transfer may exist, where the degree of transfer is independent of the L1 and L2.

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Section: Datamentioning

confidence: 99%

Chinese Native Language Identification

Malmasi¹,

Dras²

2014

Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics, Volume 2: Short Pa

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“…All analytic reagents, including D,L-LA, stannous chloride, chloroform, methanol, were commercially available; MA was purchased from J&K Scientific Ltd. (Beijing, China). All apparatuses for measuring are the same as the former reports [4][5][6][7][8][9][10][11][12][19][20][21][22][23][24]. Melt Copolymerization.…”

Section: Methodsmentioning

confidence: 99%

“…Being a good flame retardant, MA can be used as a blowing agent in polymeric materials [17,18]. Therefore, this biodegradable material P(LA-co-MA) as a new SPLA may be a novel compatible solid polymeric flame retardant for PLA materials [19,20]. Scheme 1 The synthetic route of P(LA-co-MA)…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Biodegradable Material Poly(lactic acid-<i>co</i>-melamine) via Direct Melt Polycondensation

Feng

Xiong

Wang

et al. 2013

AMR

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Directly starting fromD,L-lactic acid (LA) and melamine (MA), novel star-shaped biodegradable material poly (lactic acid-co-melamine) [P(LA-co-MA)] as a kind of potential flame retardant is synthesized via melt polycondensation. When the molar feed ration(LA)/n(MA) is 60/1, the optimal synthetic conditions are discussed. After the prepolymerization at 140 °C for 8 h, using 0.4wt% stannous chloride as the catalyst, the melt copolymerization at 160 °C for 8 h gives the copolymer with the biggest intrinsic viscosity 0.87 dLg-1.

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“…Therefore, we use MA and D,L-lactic acid (D,L-LA) as starting materials to synthesize poly(lactic acid-co-melamine) [P(LA-co-MA)] via melt copolymerization (Scheme 1) [5]. These biodegradable material P(LA-co-MA)s with different molar feed ratios may be novel compatible solid polymeric flame retardant for PLA materials [6,7]. Herein, their structures are systematically characterized by FT-IR, 1 H-NMR, 13 C-NMR and GPC.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization of Serial Novel Star-Shaped Biodegradable Material Poly(lactic acid-<i>co</i>-melamine)

Xiong

Peng

et al. 2013

AMR

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Using flame retardant melamine (MA) as a new aromatic core, biodegradable material poly (lactic acid-co-melamine) [P(LA-co-MA)] with different molar feed ratios are synthesized via direct melt copolycondensation. The structures of P(LA-co-MA) s are characterized by FT-IR,1H-NMR,13C-NMR and GPC. The results indicate that MA moiety as the core is incorporated into the PLA backbone as expected, and the obtained products are copolymers indeed.

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The development of a Chinese learner corpus

Cited by 6 publications

References 0 publications

Chinese Native Language Identification

Chinese Native Language Identification

Synthesis of a Biodegradable Material Poly(lactic acid-<i>co</i>-melamine) via Direct Melt Polycondensation

Structural Characterization of Serial Novel Star-Shaped Biodegradable Material Poly(lactic acid-<i>co</i>-melamine)

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