南京将军山地区蜻蜓目昆虫区系分析及多样性研究     

虞蔚岩  李朝晖  周珺  袁晓静  杨霞 《南京晓庄学院学报》2011,(6):77-79

作者于2005—2010年对南京将军山地区蜻蜓资源进行了初步的调查,并且采集了一定数量的标本,通过对采集标本的鉴定和分类,初步确定将军山地区蜻蜓目昆虫共计24种,隶属于6科17属．其区系组成的特点是：东洋成分占优势,有15种,约占总数的62．5％;在中国地理分布中明显偏向华中区,在采到的24种标本中华中区占有20种,约占总数的83．33％．蜻蜓的多样性指数为2．9298,均匀度指数为0．9219,优势度指数为0．4486,优势集中性指数为0．0774．  相似文献   

安徽蒙城方言中的“来”     

陆侠 《忻州师范学院学报》2011,27(3):39-42

文章在进行深入细致的实地调查基础上,从语言事实出发,运用描写等语言研究方法,重点考察了蒙城方言中"来"作为语气词和方位词的用法,认为蒙城方言语气词"来"分布领域比较广,可以用在陈述句、疑问句、感叹句和祈使句;由方位词"来"构成的词,可以表示处所地点或时间。通过分析蒙城方言中"来"的语法功能和语法意义,对了解方言语法,进一步深入研究官话方言内部的一致性和差异性提供了资料。  相似文献   

隐性课程建设:高校德育工作的创新之路     

李霞 《徐州师范大学学报(哲学社会科学版)》2005,31(2):126-129

当前我国高校德育工作存在的主要问题是缺乏针对性和有效性。要改变这一状况,必须寻求新的解决途径。应充分关注高校隐性课程的德育功能,加强隐性课程的建设,以此来全面优化高校德育过程,增强高校德育工作的实效性。  相似文献   

Quantification of the Atmospheric Corrosion of 304 and 2205 Stainless Steels Using Electrochemical Probes Based on Thevenin Electrochemical Equivalent Circuit Model     

Zhu  Yu  Song  Yang  Xu  Likun  Qin  Zhenbo  Song  Shizhe  Hu  Wenbin  Xia  Da-Hai 《天津大学学报(英文版)》2020,26(3):218-227

Stainless steel(SS) is one of the most widely used engineering materials in marine engineering. However, its corrosion in the marine atmospheric environment due to the high concentration of Cl~- is a problem. The SS corrosion is a threat to the development and security of marine industry; therefore, evaluating the corrosion resistance of SSs is necessary. In this work, atmospheric corrosion detection probes based on a symmetrical electrode system were used to study the corrosion behaviors of 304 SS and 2205 duplex stainless steel(DSS) in a simulated marine atmosphere. A theoretical model for electrochemical noise(EN) data analysis based on the Thevenin electrochemical equivalent circuit(EEC) model was established. The relationship between the EN characteristic parameters and the corrosion rate was obtained. The Thevenin EEC model analysis showed that the relationship between the noise resistance( R_n), the noise impedance [ R_(sn)(f)], and the impedance modulus(| Z( f)|) was R_n≈ R_(sn)=■. Thus, R_n and R_(sn) can be used as indicators for quantitative corrosion evaluation. The results of EN detection for the 304 SS and 2205 DSS showed that in a simulated marine atmospheric environment, the passive fi lms on the two SSs were relatively intact at the initial exposure stage, and their dissolution rates were slow. The corrosion resistance of the 2205 DSS was higher than that of the 304 SS. With the deposition of Cl~- on the SS surface, pitting was initiated and the dissolution rate increased. The pitting initiation process on the SS surface was random, and part of the active pores could be repassivated.  相似文献   

从《荆楚岁时记》看魏晋南北朝荊楚民间信仰的特征     

袁霞 《黄石理工学院学报(人文社科版)》2003,(3)

《荆楚岁时记》成书于魏晋南北朝时期,该书系统地记载了该时期荆楚地区的岁时节庆,是研究该时期该地区民间信仰的重要资料。本文挑选其中四个岁时:正月、端午、盂兰盆节、腊日,对民间信仰进行分析并归纳其特征。  相似文献   

中国职业教育的“农村情结”     

张霞 《河南职业技术师范学院学报(职业教育版)》2007,(3):5-7,47

在我国职业教育二十多年的发展过程中可以发现一个非常明显的特点:每一次涉及到职业教育的发展问题,无论是政府还是学界,几乎无一例外的都要把农村职业教育作为一个专门的话题来谈论。笔者把这一现象称之为中国职业教育的"农村情结"。我国职业教育"农村情结"的形成有其深远的思想基础和社会基础,一方面,存在着经济发展与职业教育发展关系的悖谬、职业教育发展内部关系的悖谬,另一方面,这种矛盾的发展也形成了职业教育发展的巨大推动力。  相似文献   

深圳大鹏澳断裂构造及其对库坝区水文工程地质条件的影响     

黄玉昆  陈国能  王建华  赵不亿  夏法 《中山大学学报论丛》1992,(1)

本文从断裂构造及其活动性分析入手,结合地形、岩性和水文地质条件,讨论了库区蓄水后可能产生的坝基渗漏及绕坝渗漏问题。库区发育了NNW、NW、NE及NEE向几组断裂,但它们的大多数为压性或压扭性断裂、断面闭合、构造岩硅化甚强、致密坚硬、整体性良好。而张性断裂又多被后期岩脉充填,且与初选坝址平行分布,有利于防止库区内外水体的沟通。同时库区的所有断裂均未见其切割全新统地层。同位素测年资料表明,库区几条主要断裂的最后一次活动时间发生在晚更新世初期,目前属于不活动断裂。基于各方面的分析结果认为,库区水体向外渗漏或相邻海域海水向库区灌入的可能性较小。  相似文献   

课堂教学中应用现代教育技术的问题与对策研究   总被引：6，自引：0，他引：6  

廉莲  汪令国  吴王杰  夏严 《现代教育技术》2006,16(3):49-50,16

在近年来的教学实践中,对现代教育技术于课堂教学中的应用在认识和应用上还存在这样或那样的问题。针对这些问题,可从管理、软件制作和课堂教学等方面寻找对策,加以解决,以实现课堂教学的最优化。  相似文献   

Banach空问中一阶脉冲积分-微分方程初值问题的解     

张洪谦  夏润海 《周口师范学院学报》2005,22(5):19-23

在Banach空间中讨论了混合型一阶脉冲积分-微分方程初值问题{x′=f（t,x,Tx,Sx）,A↓t∈J,t≠tk；△x｜t=tk=Ik（x（tk）,k=1,2,…,m,；x（0=x0的解，并给出了解的迭代求法．  相似文献   

Infrared Absorption Spectra of Serpentine Cat＇s Eye from Sichuan Province of China     

LU Bao - qi 《上海大学学报(英文版)》2005,9(4):365-368

Infrared （IR） absorption spectra and X-ray powder diffraction （XRD） patterrns of sexpenfine cat＇s eye from Sichuan Province have been investigated, and infrared absorption bands of the serpentine have been assigned in this paper. The results indicate that the bands near 3 600 - 3 700 cm^-1 belong to the stretching absorption band VOH, the bands in 948 - 1 100 cm^-1 axe assigned to the stretching vibraling band Usvo, and the bands at 600 570 and 440 cm^-1 respectively belong to the bending vibration band VOH, δMg-O and δSi-O. The serpentine cat＇ s eye includes two types： chrysotile and antigorite. Chrysotile has a sharp and intensive band at 3 688 cm^-1 and a weak band at 3 643 cm^-1 , while antigorite has only one intensive band in the region. At vibration band VSi-O, chrysotile and antigorite have a similar feature at 1 071 cm^-1, but the band at 980 cm^-1 in anfigorite has been split into two bands in chrysotile - a strong one at 1 027 cm^-1 and a weak one at 949 cm^-1. In addition, antigorite has a characteristic bending vibrating band δMg-O at 570 cm^-1. Based on the analysis of the feature of crystal structure, their IR differences axe well explained.  相似文献