新疆中天山西段博罗霍洛山地区早古生代地层的沉积相研究

对中天山西段博罗霍洛山地区广泛发育的早古代代各纪地层的主要特征进行了简要描述。系统讨论了寒武纪、奥陶纪和志留纪的沉积相类型及特征。对中天山地区沉积和构造发展进行了分析，结果表明在早古生代时期，本区具有裂陷带性质，并将裂陷带的演化归纳为坳陷、裂陷和闭合三个发展阶段。     

1348例聋哑人分析

1983年10月至1987年6月我科门诊检查的聋哑病人1348例,男842人,女506人。发病年龄在2岁以下者1133人,占84.05%。致病原因主要是氨基甙类抗生素中毒,其中链霉素中毒居首位,其次为庆大霉素、卡那霉素和新霉素,内耳毒性作用与每日剂量及总剂量有密切关系,但也与病人的个体易感性有关。有的仅用小剂量即迅速引起中毒且后果严重。易感性具有家族性和遗传性。小儿易发生耳中毒原因与血中药物半衰期较成年人长有关。不是绝对需要,对婴幼儿和孕妇严禁使用氨基甙类抗生素。聋哑的防治:1、早期发现。2、早期放大(配戴助听器)。3、早期语言训练。全聋病人可考虑作电子耳蜗埋植术。     

福建晚石炭世及早二叠世四射珊瑚新属种的发现

记述了福建西部龙岩、宁化等地晚石炭世及早二叠世地层中发现的四射珊瑚５个新属及其典型种。它们分别是：黄龙组的Ｙｉｎｏｐｈｙｌｌｕｍ ｃｒａｓｓｕｓ，Ｎｉｎｇｈｕａｐｈｙｌｌｕｍ ｔｙｐｉｃｕｍ，马平阶的Ｐｓｅｕｄｏｂｏｔｈｒｏｐｈｙｌｌｕｍ ｆｕｊｉａｎｅｎｓｅ，Ｐａｒａａｎｔｈｅｒｉａ ｉｒｒｅｇｕｌａｒｉｓ，Ｊｉｎｇｙａｎｇｏｐｈｙｌｌｕｍ。     

The earliest-known ancestors of Recent Priapulomorpha from the Early Cambrian Chengjiang Lagersttte

It was suggested and eventually has been profferedthat the representatives of all extant phyla, including someminor group, occurred during the Cambrian radia-tions[1—10]. Many priapulid-like fossil worms have beenreported from Cambrian Lagerst?tten, such as the EarlyCambrian Chengjiang Lagerst?tte[11—16], the Middle Cam-brian Burgess Shale[17], and the Middle Cambrian Kailifauna[18]. The palaeoscolecidan worms from these Lager-st?tten have been regarded as either a stem group of thepri…     

高校贫困学生动态管理预警机制探析

针对目前高校贫困学生管理中存在的问题,从分析预警机制内涵入手,提出采用动态管理预警机制来更好地帮助和教育贫困学生,使其得到积极有效的帮扶,并探讨了高校贫困学生动态管理预警系统的结构组成与运作模式。     

Characteristics of Early Eocene radiolarian assemblases of the Sasa area, southern Tibet and their constraint on the closure history of the Tethys

Quantitative analysis of Early Eocene radiolarian assemblages discovered in the sedimentary melange （accretionary prism） of the Saga area, southern Tibet provides new information to constrain the timing of Tethys closure and the initial collision of India and Eurasia. The radiolarian species of Saga include Amphisphaera coronata （Ehrenberg）, Buryella hannae Bak ＆ Barwicz-Piskorz, Buryella clinata Foreman, Buryella tetradica Foreman, Calocycloma ampulla （Ehrenberg）, Lamptonium fabaeforme constrictum Riedel and Sanfilippo, Lamptonium pennatum Foreman, Lithomespilus coronatus Squinabol and Lamptonium （？） colymbus Foreman. The adequate and reliable correlation of these radiolarians specimens indicates that the assemblage is of Early Eocene in age. The age and depositional environment of these radiolarians testify that deep ocean basins existed between India Plate and Asia Plate during the Early Eocene. The complete closure of Tethys must have taken place at least after the Early Eocene.     

On fossil remains of Early Pleistocene tapir (Perissodactyla, Mammalia) from Fanchang, Anhui

The materials of Tapirus from Renzidong,Fanchang, Anhui Province, are the best ones among the early most Pleistocene findings in China up to now, not only in richness, but also in completeness. The fossils contain complete tooth rows of both the upper and the lower, as well as most parts of the postcranial skeletons. These materials are very helpful in understanding the evolutionary level of this kind of animal. In morphology, the materials from Fanchang appear to be very similar to Tapirus sanyuanensis, and can be placed within this species. The materials from Fanchang provided sound evidence to distinguish the Early Pleistocene tapirs and the living form Tapirus indicus. As to the geological distribution, it can be tentatively concluded that Tapirus sanyuanensis and Tapirus sinensis only appeared in Early Pleistocene, Megatapirus appeared after Early Pleistocene,and lasted until Holocene. The Early Pleistocene tapirs of South China resemble Megatapirus more closely than Tapirus indicus.     

被动围压下早龄期补偿收缩钢纤维混凝土冲击压缩性能试验

为了研究被动围压约束条件下早龄期混凝土动态力学性能,利用直径74 mm分离式霍普金森压杆进行试验。在不同加载气压钢质套筒被动约束条件下,测试7 d龄期补偿收缩钢纤维混凝土试件轴向或径向的应力和应变变化趋势。结果表明:补偿收缩钢纤维混凝土材料在被动围压下,延性和抵抗破坏能力显著加强,试件轴向应力-时间历程曲线和轴向应力-应变曲线可知,整个加载过程分为三个阶段。第一阶段为弹性阶段,由于试件刚性所致,应力增幅快;第二阶段为弹塑性阶段,试件逐步压缩变形,应力增长缓慢,应变增幅大;第三阶段为试件塑性破坏阶段,应力直线下降;在0.6 MPa、0.7 MPa和0.8 MPa气压作用下,试样典型轴向应力峰值为无围压条件单轴压缩SHPB实验时的1.5~1.8倍;试件破坏应变高达(23~27)×10-3,是无围压SHPB试验试件破坏应变的4~6倍;从试件破坏形态看,由于钢纤维掺入,试件仍保持较好的整体性,裂缝分布表征试件为压剪破坏。     

黑杨派新无性系研——Ⅶ生长早期选择

<正>本文以年遗传增益(△G_t)和期望遗传增益(G_t)为评定尺度,分别讨论了Ⅰ-69杨×小叶杨和Ⅰ-69杨×欧洲黑杨F_1无性系树高、胸径和材积的最佳选择年龄(x_(max)),利用聚类分析的方法对早期选择效果的稳定性进行了检验。Ⅰ-69杨×小叶杨F_1无性系的早期选择年龄可早至定植后2年 (包括定植年龄),Ⅰ-69杨×欧洲黑杨F_1无性系早期选择年龄在定植后3年(不包括定植年龄)。在这些年龄对无性系进行的选择能够代表轮伐年龄的选择,并且选择的遗传增益将达到最大。研究结果表明,黑杨派新无性系的早期选择是有效的。     

20世纪60年代以来清前期督抚研究综述

经过多年的辛勤努力,学术界在清代前期督抚制度、督抚人物等方面的研究取得了丰硕的成果,但也存在制度与人物研究不协调等问题.