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中动构句选择限制的认知阐释 被引量:42
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作者 何文忠 《外语研究》 CSSCI 北大核心 2007年第1期6-11,共6页
中动构句过程中对于动词和副词/形容词存在选择限制,即一方面选择满足体式条件的事件动词,另一方面选择语义上不是由施事自主控制的副词或形容词。这两种选择限制是由中动结构的认知功能决定的,中动结构虽然并不报道具体事件,但它描述... 中动构句过程中对于动词和副词/形容词存在选择限制,即一方面选择满足体式条件的事件动词,另一方面选择语义上不是由施事自主控制的副词或形容词。这两种选择限制是由中动结构的认知功能决定的,中动结构虽然并不报道具体事件,但它描述虚拟事件的特性,因此动词必须是事件动词;同时中动结构之意图是弱化施事的作用而强化被动参与者在事件中的积极作用,因而一个语义上由施事自主控制的形容词或副词必然又会突显施事的作用,这与中动结构的认知动因是相矛盾的。中动构句的选择限制只有通过解析其认知功能才能得到充分合理的解释。 展开更多
关键词 中动结构 选择限制 认知功能 自主性 体式条件
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CFD modeling of methane distribution at a continuous miner face with various curtain setback distances 被引量:10
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作者 Zhou Lihong Pritchard Christopher Zheng Yi 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第4期635-640,共6页
Knowledge of the airflow patterns and methane distributions at a continuous miner face under different ventilation conditions can minimize the risks of explosion and injury to miners by accurately forecasting potentia... Knowledge of the airflow patterns and methane distributions at a continuous miner face under different ventilation conditions can minimize the risks of explosion and injury to miners by accurately forecasting potentially hazardous face methane levels. This study focused on validating a series of computational fluid dynamics(CFD) models using full-scale ventilation gallery data that assessed how curtain setback distance impacted airflow patterns and methane distributions at an empty mining face(no continuous miner present). Three CFD models of face ventilation with 4.6, 7.6 and 10.7 m(15, 25, and 35 ft) blowing curtain setback distances were constructed and validated with experimental data collected in a full-scale ventilation test facility. Good agreement was obtained between the CFD simulation results and this data.Detailed airflow and methane distribution information are provided. Elevated methane zones at the working faces were identified with the three curtain setback distances. Visualization of the setback distance impact on the face methane distribution was performed by utilizing the post-processing capability of the CFD software. 展开更多
关键词 Mine ventilation Computational fluid dynamics Continuous mining face Airflow pattern Methane distribution
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Pulsed electrohydrodynamic printing of conductive silver patterns on demand 被引量:4
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作者 WANG Xiangt XU Lei +2 位作者 ZHENG GaoFeng CHENG Wei SUN DaoHeng 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第6期1603-1607,共5页
Pulsed electrohydrodynamic printing (EHDP) is used to fabricate conductive silver patterns with micrometer resolution. The silver ink pendant experiences swelling, pulsation, and ejection under an applied pulse volt... Pulsed electrohydrodynamic printing (EHDP) is used to fabricate conductive silver patterns with micrometer resolution. The silver ink pendant experiences swelling, pulsation, and ejection under an applied pulse voltage of 20 Hz. The droplet deposi- tion frequency is equal to the applied voltage frequency so that the EHDP can deposit silver ink on demand. A low applied voltage favors uniform and non-scattering silver patterns while a high applied voltage results in ink scattering. Discrete drop- lets with 45-55 gm in diameter and continuous tracks with 60 gm in width are generated by using a ll0-i.tm-cailber nozzle. The feature size of deposited patterns is about half of the nozzle caliber, and a finer resolution can be achieved with the intro- duction of smaller nozzle calibers. Furthermore, the appropriate curing condition is investigated for sufficient combustion of ink solvent. The minimum resistivity of 3.3 gf~ cm is demonstrated for a continuous track cured at 200~C for 10 min. Eventu- ally, several passive electrical components, such as coated resistors, interdigitated capacitors (6 pF), and spiral inductors (0.6 gH), are successfully fabricated. 展开更多
关键词 electrohydrodynamic printing inkjet printing drop on demand printed electronics silver ink conductive pattern
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