A new genus and species of Conchaspididae (Hemiptera: Coccoidea) from Florida,remarkable in lacking legs

A new genus of Conchaspididae, Asceloconchaspis gen. nov., is described for Asceloconchaspis milleri sp. nov., a new species from Florida, USA. Unlike other conchaspidids, the adult female and second instar of the genus lack legs. The presence of legs is one of the important, distinguishing characters at present separating the Conchaspididae from the Diaspididae. However, the new genus also possesses well-developed antennae and has multilocular disc pores on the abdomen in the adult female; these distinctly conchaspidid characters are never found in the Diaspididae. Asceloconchaspis is closely related to Fagisuga Lindinger, a monotypic genus with primitive characters described from South America on Nothofagus. A key to the four known genera of Conchaspididae is provided, and the morphology and distribution of the Conchaspididae are discussed.     

论董其昌绘画理论对汪野亭瓷板画的影响

以汪野亭山水瓷板画为研究对象,结合董其昌的绘画理论,从汪野亭山水画师古与师造化的创作历程、对以书入画创作手法的继承和＂天真幽淡＂主导下兼擅南北宗山水风格三方面入手,探求董其昌绘画理论对汪野亭山水瓷板画,尤其是其后期独创的青绿山水粉彩瓷画的异代影响,以期为汪野亭瓷板画创作研究提供另一有益角度。     

网络舆情及其应对与上市公司的信息效率

网络舆情的兴起给资本市场带来了深远影响,对监管层和上市公司的舆情管理工作也提出了新的挑战.借助于监管部门对深市上市公司网络舆情应对状况的调查,实证检验了网络舆情及其应对与上市公司的信息效率的关系.研究发现,网络舆情危机会造成当年度股价崩盘,且来自自媒体的转载会增大股价崩盘的幅度,网络舆情重视和应对程度良好的公司在面对舆情危机时的股价崩盘幅度更低.上市公司对网络舆情的重视及投入能够向资本市场传递公司特质信息,提高资本市场的信息效率,进而降低未来股价崩盘风险和股价同步性.结论表明,上市公司加强网络舆情应对并非是满足监管要求和投资者诉求的面子工程,而是一项切实有效的求是工作,结论对完善资本市场信息传播管理制度,提高资本市场信息效率具有一定的参考价值.     

高校图书馆文化育人路径探析

阐述了文化育人的内涵，以乐山师范学院图书馆文化育人为例，从高品位的阅览环境、丰富的特色文化以及馆员素质3个方面，论述了高校图书馆文化育人的路径。     

Effects of Cr and Mo elements on the microstructures and compressive properties of the in situ (TiC_xN_y–TiB_2)/Ni cermets

In-situ(TiC_xN_y–TiB_2)/Ni cermets with 70 wt%TiC_xN_y–TiB_2 were successfully fabricated by combustion synthesis and hot pressing sintering in Ni-Ti-B_4C-BN powder systems.The microstructures,density,compressive properties,and hardness of the TiC_xN_y–TiB_2/Ni cermets with the addition of 0–8 wt%Cr/Mo to the Ni-Ti-B_4C-BN powder systems were compared and analysed.The results showed that the ceramic particles distributed uniformly in the cermets,and the size of the ceramic particles reduced with the Cr/Mo addition.Both Cr and Mo addition can improve the hardness,compressive properties,and fracture strains of the cermets.The hardness,compressive strength,and fracture strain of the(TiC_xN_y–TiB_2)/(Ni+Cr)cermets increased from 1561 HV,2.94 GPa,and 2.9%to 1864 HV,3.65 GPa,and 3.4%,respectively when the Cr content increased to 5 wt%.The hardness and compressive strength of the(TiC_xN_y–TiB_2)/(Ni+Mo)cermets increased from 1561 HV and 2.94 GPa to 1902 HV and 3.43 GPa,respectively when the Mo content increased to 8 wt%.The cermets with Cr had better compressive properties than the cermets with Mo.     

Taxonomy of the genus Tantunema Siddiqi, 1982 (Dorylaimida: Tylencholaimidae) with description of one new and two known species

One new and two known species of the genus Tantunema Siddiqi, 1982 are described and illustrated. Tantunema indicum sp. nov. is characterized by having a small body (length 0.32–0.45 mm); lip region cap-like, set off by slight constriction; odontostyle 6–7 µm and odontophore 8–10 µm long; pharyngeal expansion gradual, expanded part occupying about 35–41% of total neck length, lumen of posterior expanded part widened and thickened; female genital system mono-opisthodelphic, anterior genital branch absent; tail short, hemispheroid, 0.8–1.1 anal body diameter long. Tantunema pakistanense (Timm, 1964) comb. nov. (=Tylencholaimus pakistanensis Timm, 1964) and Tantunema intermedium (Peña-Santiago and Coomans, 1996) Andrássy, 2009 are redescribed. A diagnostic compendium and key to species of the genus is also provided.     

丰富的交叉地带——路遥小说的创作特色

城乡交叉地带是路遥小说创作中自觉探索的一个独特领域,也是路遥小说创作的一个主要特色。它不仅揭示了城乡之间在物质生活上的巨大差距,更从文化心理上折射出在社会转折时期,游离于城市生活与乡土观念、现代文明与传统道德之间的农村青年人的复杂感情。文章从交叉地带的形成过程及其社会历史内涵等角度揭示了城乡交叉地带的这种丰富性。     

清代旗人与《红楼梦》

《红楼梦》是一部影响非常广泛深远的小说,自以抄本行世以来,在社会上尤其是在旗人中的影响越来越深刻。这部由清代旗人创作的小说,很早就被认为描写的是旗人社会生活,并一直受到旗人的特别关注,从这一角度进行了阐述。注重这部小说与旗人的关系,对深入研究《红楼梦》和八旗文化,也许会有更多的发现。     

《楝亭图咏·寄题楝亭二截句》与余怀的遗民情结

《楝亭图咏》为张伯驹旧藏,今存于国家图书馆.它是曹寅为彰显其父曹玺功德,广集名家追怀赞颂曹玺的画作、题诗、题文而成的册页.此册页纸色、纸质不一,后经改装成卷,现存四卷.著名文人余怀亦题诗二首.该诗不仅反映了余怀的思想和遗民情结,也是余怀研究的重要文献之一.     

《算数之钥》中球形穹顶的测量法

中世纪中亚数学家阿尔·卡西在《算术之钥》中不但给出了5种伊斯兰建筑风格拱形门和球形穹顶的设计方案,而且用初等方法计算了其中拱形部分的表面积和体积,遗憾的是,他没有给出球形穹顶部分的表面积和体积的具体计算过程,只用文字叙述了用初等数学方法来计算其中第四类球形穹顶表面积和体积的基本思路,并直接给出了球形穹顶表面积和体积分别与其直径平方和直径立方之比的近似值.讨论了阿尔·卡西的初等算法,并用微积分方法来验证其算法的正确性,同时指出阿尔·卡西得到的数据与实际数据之间的误差.