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三二一,出发,打雪仗去啦
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作者 郭普 《新作文(小学中高年级版)》 2009年第12期7-8,共2页
放学后,小伙伴们不约而同地来到院子里,一个个摩拳擦掌,准备开始一场别开生面的雪战。我们十几个人,经过商量,平均分成两组,还编上了号。就这样我们“超人队”和对方的“飞人队”开始了雪中的白色较量。我们先画出边界,建好各自... 放学后,小伙伴们不约而同地来到院子里,一个个摩拳擦掌,准备开始一场别开生面的雪战。我们十几个人,经过商量,平均分成两组,还编上了号。就这样我们“超人队”和对方的“飞人队”开始了雪中的白色较量。我们先画出边界,建好各自的根据地。又分头准备,有的用雪做成各式各样的武器,有的去远处运雪补充雪库。双方准备就绪,一声令下,惊险的超级雪仗开始啦。 展开更多
关键词 《三二一 出发 打雪仗去啦》 小学 语文 作文
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三二一,骑车去啦
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作者 许晨 《新作文(小学低年级版)》 2010年第10期36-37,共2页
今天,我以最快的速度吃了饭,你们知道为什么吗?因为今天我要学习骑自行车。第一招:爸爸挡车。我小心翼翼地坐到自行车上,爸爸一手握住车把,一手抓着坐垫。我的手紧紧地握着车把,双脚生硬地踩着踏板,吃力地向前前进着。我的眼睛总是看... 今天,我以最快的速度吃了饭,你们知道为什么吗?因为今天我要学习骑自行车。第一招:爸爸挡车。我小心翼翼地坐到自行车上,爸爸一手握住车把,一手抓着坐垫。我的手紧紧地握着车把,双脚生硬地踩着踏板,吃力地向前前进着。我的眼睛总是看着脚, 展开更多
关键词 《三二一 骑车去啦》 小学生 作文 语文教学
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湘语新化话中“一二三”的形容词用法
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作者 肖任飞 《湖南科技大学学报(社会科学版)》 CSSCI 北大核心 2010年第3期117-119,共3页
"一二三"在湘语新化话中有一种特殊的用法,它在句法功能上相当于形容词,可以做状语、定语和谓语,语义上意为"容易""快",表示相对A来说,B做起来容易、费时短。文章还从认知和语言比较的角度探讨了"... "一二三"在湘语新化话中有一种特殊的用法,它在句法功能上相当于形容词,可以做状语、定语和谓语,语义上意为"容易""快",表示相对A来说,B做起来容易、费时短。文章还从认知和语言比较的角度探讨了"一二三"的词义演变规律,认为形容词用法的"一二三"来源于"提示……准备"义的"一二三"。 展开更多
关键词 湘语 一二三 形容词
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俗语词“三七二十一”的用法及其发展
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作者 张文国 《现代语文》 2021年第3期4-8,共5页
俗语词“三七二十一”经历了一个产生、发展、稳定的过程。先秦至明代中期,“三七二十一”尚未凝固成一个俗语词,仍然是一个简单的乘法口诀。明代晚期,它才真正被作为一个俗语词来使用,一般出现在“搭配成分+(插入成分+)三七二十一”的... 俗语词“三七二十一”经历了一个产生、发展、稳定的过程。先秦至明代中期,“三七二十一”尚未凝固成一个俗语词,仍然是一个简单的乘法口诀。明代晚期,它才真正被作为一个俗语词来使用,一般出现在“搭配成分+(插入成分+)三七二十一”的结构中。清代初期至中期、清末民初时期,其用法得到了进一步的发展。到了现代汉语,最终稳定下来。其中,在清末民初时期,其用法的发展变化最为明显。 展开更多
关键词 “三七二十一” 俗语词 搭配成分 插入成分 清末民初
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重揭《红楼梦》“一从二令三人木”之谜
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作者 王远峰 《内蒙古师范大学学报(哲学社会科学版)》 2006年第3期114-119,共6页
对“一从二令三人木”之谜的探究,必须用脂砚斋所批之“拆字法”。谜底应是“六人令休”之意。“六人令休”是曹雪芹创作思想中存在的“因果报应观”的具体表现。这句谶语是曹雪芹在对王熙凤“爱而知其恶”的矛盾心理下设计的。
关键词 《红楼梦》 一从二令三人木 因果报应观
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Time-Dependent Zinc Desorption in Some Calcareous Soils of Iran 被引量:1
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作者 M.BARANIMOTLAGH M.GHOLAMI 《Pedosphere》 SCIE CAS CSCD 2013年第2期185-193,共9页
Desorption of zinc (Zn) from soil is an important factor governing Zn concentration in the soil solution and Zn availability to plants. Batch experiments were performed to study the kinetics of Zn desorption by diet... Desorption of zinc (Zn) from soil is an important factor governing Zn concentration in the soil solution and Zn availability to plants. Batch experiments were performed to study the kinetics of Zn desorption by diethylenetriaminepentaacetic acid (DTPA) from 15 calcareous soil samples taken from Golestan Province in northern Iran. Soils were equilibrated with 0.005 mol L-1 DTPA solutions for 0.25 to 192 h. The results showed that the extraction process consisted of rapid extraction in the first 2 h followed by much slower extraction for the remainder of the experiment. Desorption kinetic data was fitted to pseudo-first-order kinetic model. The experimental data were found to deviate from the straight line of the pseudo-first-order plots after 2 h. The model of two first-order reactions was fitted to the kinetic data and allowed to distinguish two pools for Zn: a labile fraction (Q1), quickly extracted with a rate constant kl, and a slowly labile fraction (Q2), more slowly extracted with a rate constant k2. The applicability of pseudo-second-order model in describing the kinetic data of Zn desorntion was also evaluated. 展开更多
关键词 diethylenetriaminepentmucetic acid kinetic models labile fraction zinc availability
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PREDICTING SUBCHLOROPLAST LOCATIONS OF PROTEINS BASED ON THE GENERAL FORM OF CHOU'S PSEUDO AMINO ACID COMPOSITION: APPROACHED FROM OPTIMAL TRIPEPTIDE COMPOSITION 被引量:3
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作者 HAO LIN CHEN DING LU-FENG YUAN WEI CHEN HUI DING ZI-QIANG LI FENG-BIAO GUO JIAN HUANG NI-NI RAO 《International Journal of Biomathematics》 2013年第2期47-60,共14页
Chloroplasts are organelles found in plant cells that conduct photosynthesis. The subchloroplast locations of proteins are correlated with their functions. With the availability of a great number of protein data, it i... Chloroplasts are organelles found in plant cells that conduct photosynthesis. The subchloroplast locations of proteins are correlated with their functions. With the availability of a great number of protein data, it is highly desired to develop a com- putational method to predict the subchloroplast locations of chloroplast proteins. In this study, we proposed a novel method to predict subchloroplast locations of proteins using tripeptide compositions. It first used the binomial distribution to optimize the feature sets. Then the support vector machine was selected to perform the prediction of subchloroplast locations of proteins. The proposed method was tested on a reliable and rigorous dataset including 259 chloroplast proteins with sequence identity ≤ 25%. In the jack-knife cross-validation, 92.21% envelope proteins, 93.20% thylakoid mem- brane, 52.63% thylakoid lumen and 85.00% stroma can be correctly identified. The overall accuracy achieves 88.03% which is higher than that of other models. Based on this method, a predictor called ChloPred has been built and can be freely available from http://cobi.uestc.edu.cn/people/hlin/tools/ChloPred/. The predictor will provide important information for theoretical and experimental research of chloroplast proteins. 展开更多
关键词 Subchloroplast localization TRIPEPTIDE binomial distribution support vectormachine.
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First-principles study of hydrogen diffusion mechanism in Cr_2O_3 被引量:1
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作者 CHEN ChangFeng YU HaoBo ZHENG ShuQi 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第1期88-94,共7页
The system energy of H atom occupying different positions in Cr2O3 crystal lattice is calculated by adopting the first-principles calculation method based on density functional theory in this paper. The results indica... The system energy of H atom occupying different positions in Cr2O3 crystal lattice is calculated by adopting the first-principles calculation method based on density functional theory in this paper. The results indicate that the most stable position of H atom in Cr2O3 crystal lattice locates at the bilateral positions of the center of the unoccupied O octahedral interstice. The reason resulting in this situation is analyzed by comparing the change of Cr2O3 lattice distortion and density of states in Cr2O3_H system when H atom locates at different positions in octahedral interstice. The diffusion activation energy of H atom is 0.73 eV,which is determined by seeking the diffusion path and transition state of H atom in Cr2O3 crystal lattice. The effective attempt frequency of H atom in Cr2O3 crystal lattice is also calculated by using molecular dynamics. Combining with diffusion activation energy data,the diffusion coefficient of H atom in Cr2O3 crystal is determined. 展开更多
关键词 CR2O3 H atom first.principle diffusion coefficient
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