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Search Results: 1 - 10 of 262345 matches for " <br>夏小春 "
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Determination of the effective contents of small cation in drilling fluid additives using ion-pair reversed-phase liquid chromatography with evaporative light scattering detection
离子对反相液相色谱-蒸发光散射检测法分析钻井液添加剂“小阳离子”的有效含量

XIA Xiaochun,GUO Lei,ZHAO Zhiqiang,LIU Keqing,YAN Changhong,YI Yong,<br>小春,郭磊,赵志强,刘克清,闫长虹,易勇
色谱 , 2010,
Abstract: 建立了离子对反相液相色谱-蒸发光散射检测器测定钻井液添加剂“小阳离子”2,3-环氧丙基三甲基氯化铵(EPTMAC)和3-氯-2-羟丙基三甲基氯化铵(CHPTMAC)有效含量的方法。以Atlantis T3柱(150 mm×4.6 mm, 5 μm)为分析柱,流动相为甲醇-5 mmol/L七氟丁酸水溶液(10:90, v/v),流速为1 mL/min。蒸发光散射检测器漂移管的温度为50 ℃,气体压力为206.7 kPa(30 psi)。样品用超纯水稀释过滤后直接进样分析,10 min内EPTMAC和CHPTMAC获得分离和检测。采用二阶方程对标准曲线进行拟合,EPTMAC和CHPTMAC校正曲线的相关系数均为0.9995,检出限(S/N=3)分别为13 mg/L和18 mg/L,定量限(S/N=10)分别为45 mg/L和61 mg/L,平均回收率分别为91.2%~98.6%和93.2%~102.3%,相对标准偏差(n=5)分别为1.7%~2.5%和1.2%~1.8%。该方法快速准确,可用于油田钻井液添加剂“小阳离子”的质量控制。
A STUDY OF SEMANTIC AND GRAMMATICAL FACTORS INFLUENCING PRONOUN PROCESSING
影响代词加工的语义和语法因素研究

Miao,Xiaochun,<br>缪小春
心理学报 , 1996,
Abstract: This study examined the influence of sentence semantics, the parallel function of pronoun and its antecedent,and whether the pronoun is the subject of sentence on pronoun processing, The results showed that semantics is the primacy in pronoun assignment.The subjects generally select the referent of pronoun on the basis of semantic information. The parallel function of pronoun and its antecedent speeds pronoun assignment under certain conditions.The parallel function strategy was partially supported in the study, Whether the antecedent is the subject or is first mentioned in the clause affects the assignment and its rate to a certain extent.
MODELING OF TRAFFIC NETWORK IN GEOGRAPHIC INFORMATION SYSTEM
地理信息系统中的网络模型

Xiaochun Di,<br>狄小春
地理研究 , 1990,
Abstract: There are many linear phenomena in our daily life. They are traffic, communication, and goods transportation etc.These phenomena can be organized into linear networks in ARC/INFO Geographic Information System (GIS). This paper describes how to Prepare, and create the City of Beijing traffic network by using ARC/INFO GIS.PATHFINDING and ALLOCATE are two functions in ARC/INFO NETWORK. The best path can be found between an origin and a destination, and the most efficient movement of resources can be allocated by using the t wo functions .After the network coverage (a file of traffic map in ARC/INFO GIS) processed, the network database has been created.The different applications of the network can be done.Finally, the modelling of traffic network has been established.It is not only for extending streets, also for building a new traffic route very efficient lly.
tdscdma标准智能天线的不可用性研究
傅海阳,张青,小春,
南京邮电大学学报(自然科学版) , 2007,
Abstract: 不少tdscdma标准研究人员认为采用智能天线核心技术后可以克服tdd模式的步行移动通信系统特征。文中从智能天线的定向发射方向图出发证明了在cdma(码分多址)系统中使用智能天线时,会引入不同方向用户产生的cdma系统自干扰,使智能天线的有效定向发射增益近似为零,无法实现空分多址隔离多用户干扰的预想目标。此外还从tdscdma的系统特征、智能天线同时形成多个发射方向波束的可能性、方向性线阵智能天线的合理性等方面讨论了智能天线在tdscdma标准中的不可用性。
A STUDY ON THE COMPREHENSION OF OF CHINESE IDIOMS
汉语习语理解研究

Gu Beiye,Miao Xiaochun,<br>顾蓓晔,小春
心理学报 , 1995,
Abstract: The purpose of this study was to explore the processing of Chinese idioms.The materials used in the study included:(1) idioms of verb-object structure which have both literal and figurative meaings;(2) phrases of the same structure as(1);(3)idioms of modifier-modified structure which have both literal and figurative meanings;(4)phrases of the same structure as(3);(5)idioms of the same structure as(1) which only have figurative meaning;(6)words.All of these items consist of 3 characters, and are familiar to the subjects.Subjects were presented with these materials and(7) three character nonsense items and were asked to judge whether these items made sense.The RT of all kinds of idioms showed no significant differences. The effect of syntax structure in idiom comprehension was not significant and so was the difference between double-meaning idioms and single-meaning idioms. The effect of idiom form was significant.They were shorter than that of phrases,and longer than that of words.The results basically supported the simultaneous processing model of idiom comprehension. In addition,the article discussed the problem of lexicalization of idiom.
Change about Soil Erosion and Soil Properties in Reclaimed Forestland of Loess Hilly Region
黄土丘陵林地土壤侵蚀与土壤性质变化

ZHA Xiaochun,TANG Keli,<br>查小春,唐克丽
地理学报 , 2003,
Abstract: Based on the data observed from 1989 to 1998 in Ziwuling, the change of soil erosion and soil physico-mechanical properties was studied after forestland reclamation. When the man-induced factors changed the eco-environment by reclaiming forestlands, the intensity of man-made soil erosion in reclaimed lands was 1000 times more than that of the natural erosion to forestlands. From the analysis of soil physical mechanics properties, the clay content and physical clay content decreased 2.74% and 3.01% respectively, and the > 0.25 mm water stable aggregate content also decreased 58.7%, the soil unit weight increased and the soil shear strength decreased, all of which were easier to cause soil erosion. The results of the correlation analysis showed that > the 0.25 mm water stable aggregate content was the maximum affecting factor to soil erosion, the partial correlated coefficient was 0.9728, and then were soil coarse grain and soil shear strength, the partial correlated coefficients were 0.8879 and 0.6020 respectively. The relation between the >0.25 mm water stable aggregate content, the soil sheer strength and the soil erosion intensity were analyzed.
马莲河全新世古洪水沉积学和水文学研究
周芳,小春,黄春长,,桑京京
地理科学进展 , 2011, DOI: 10.11820/dlkxjz.2011.09.002
Abstract: 通过对马莲河中下游的深入考察,在甘肃省合水县河段发现全新世古洪水滞流沉积剖面,对采集的沉积物样品进行粒度成分、石英砂表面结构等分析,证明为典型的古洪水滞流沉积物。通过地层学年代对比分析,确定马莲河在全新世中晚期发生特大洪水,年代大致为4200~4000aB.P.之间。根据该组古洪水滞流沉积物所指示的洪峰水位,采用比降法恢复洪峰流量在16400~16900m3/s之间。同时对该断面2003年和2005年洪水的洪痕进行了流量恢复计算,计算结果与实测洪水误差小于5%,证明古洪水水文学计算结果合理可靠,从而为马莲河水利工程建设及沿岸城镇的防洪减灾提供了科学依据。
黄河中游晋陕峡谷段全新世晚期洪水滞流沉积研究
魏海燕,黄春长,小春,庞奖励,
地质论评 , 2010,
Abstract: 通过对黄河晋陕峡谷的深入调查研究,在延长永和县河段发现了典型的全新世晚期洪水滞流沉积剖面。在野外考察中,对沉积物的宏观特征和沉积环境及其分布特征进行观察,并进行了系统采样。在实验室对沉积物样品进行了粒度成分、磁化率、烧失量、CaCO??3?含量等测定。通过综合分析论证,表明黄河中游晋陕峡谷全新世晚期洪水滞流沉积物以粉砂为主,细砂含量次之,粘粒含量很少,分选性好,磁化率很低。其沉积学分类为细砂质粉砂,是黄河洪水悬移质泥沙在高水位滞流环境下的沉积物。将其与典型的全新世风成黄土和古土壤进行对比,可知其粒度成分比黄土和古土壤更粗,粒级分布更为集中。此外,将其与延河郭家川全新世洪水滞流沉积物对比,发现其粒度频率分布基本相似。该研究结果对于揭示黄河中游洪水水文泥沙特性及其历史演变具有重要意义。
一种光导开关线路功率合成方法
尚丽平,小春,高扬,邓琥,祖学
电子学报 , 2011,
Abstract: 本文针对提高光导开关输出辐射功率的问题,尝试性地提出了一种基于电子线路的功率合成方法,采用双电容分别对两个光电开关进行驱动,简化了功率合成的电路设计,实验结果表明通过串联倍压对光导开关输出功率进行合成是可行的,且合成效率高.
上海心理学会召开1960年度年会
小春
心理学报 , 1961,
Abstract: 为了检閱几年来上海心理学研究工作的成绩,活跃学术空气,推动今后工作,上海心理学会于四月間召开了1960年度年会。提交年会的有教育心理学、医学心理学方面的研究报告二十余篇。会上对心理学科学研究方針和有关学术問題展开了热烈的討論。中国心理学会副理事长曹日昌同志参加了会議,作了发言,并介紹了北京心理
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