Activity and reproductive patterns of lizards in the Chaco of Argentina

We studied the activity and breeding pattern of dominant lizard species in the Arid Chaco, the southernmost subregion of the Chaco ecoregion (Chancaní Reserve, Córdoba province, Argentina). Lizards were captured with pitfall traps over a 4-year period. In total, 1449 individuals belonging to 11 of the 12 lizard species recorded in the area were trapped. Of these, we selected six species for a detailed analysis: Teius teyou and Stenocercus doellojuradoi accounted for 63% of the captures, Tropidurus etheridgei, Liolaemus chacoensis and Homonota fasciata accounted for 32%, and 5% comprised Leiosaurus paronae and the remaining five species. All the studied species were active during the warm–rainy season (September to March). Monthly lizard captures were highly correlated with monthly mean temperature and rainfall. No captures occurred during the remaining months of the year. All reproductive tactics known for the Chaco lizards were observed in Chancaní, including single clutch in a short breeding season in summer or autumn, as well as an extended breeding season with multiple clutches. Stenocercus doellojuradoi and L. paronae showed a singular reproductive timing, suggesting the occurrence of egg retention. Compared with sub-tropical Chaco sites, the Arid Chaco only differs in the lack of winter activity, resulting from the lower temperature and rainfall regime of our study site.     

预警卫星功能仿真系统

采用系统仿真技术建立了预警卫星功能仿真模型,对系统功能、系统结构以及系统实现的关键技术进行了较为详细的说明     

毕节巨猿化石与共生旧石器的发现及其意义

本文报道毕节八儿崖洞穴堆积出产的巨猿化石和共生的石制品,是贵州第四纪研究和旧石器考古一项有突破性意义的新发现.该动物群含先东方剑齿象、小种大熊猫、桑氏粗壮鬣狗、山原貘、黄昏兽和裴氏猪等标志性成员,与重庆巫山龙骨坡等动物群非常相似,同属于早更新世早期.这一发现为重建贵州喀斯特发育史和复原古环境提供难得的时代坐标与内容丰富多彩的素材.八儿崖遗址出土的旧石器含"原型手斧"和"原型手镐"等非洲同时代的早期手斧文化要素,对研究旧大陆早期人类迁徙有重要意义.     

小儿结核性脑膜炎早期诊断及误诊分析

对我院收治的72例小儿结核性脑膜炎(TBM)中的48例误诊病例进行回顾性分析,认为对TBM缺乏警觉性,流行病学资料不完整,TBM早期临床表现及CSF改变不典型是误诊的主要原因.对疑似病例应及时行PPD试验,CSF常规检查及头颅CT或MRI检查,必要时行PCR-TB-DNA检测,有助于TBM的早期诊断.这是目前基层医院TBM早期诊断的主要手段.     

高温高能高密度极端条件下可能出现的新现象

近年来理论研究和实验探测都已预示在高温高能高密度的极端条件下出现新现象的可能：温度高于Planck质量(1019　GeV)标准模型命运的改变,重子数和轻子数（B+L）的破坏问题,普通强子物质和夸克-胶子等离子体在高温下的转化等问题．笔者据自己的研究成果,提出一些观点和结论,希望对天体-粒子物理的研究能有所推动．     

物质平衡方法在气藏开发中的应用

物质平衡方法在气藏开发中占有重要位置。对于水驱气藏来说,水侵主要维持地层压力,直到水突破之后,将会直接影响到气藏的采收率。因此如何在早期识别气藏的类型,从而进行开发的部署显得相当重要;另外气藏地质储量、采收率的确定已经动态指标的预测也贯穿了整个开发历程。目前不少学者对于气藏物质平衡进行了大量的基础性研究工作,为了更深入的了解物质平衡方法在实际气藏开发中有哪些应用,从水驱气藏的早期识别、水驱气藏水侵量的计算、地质储量的确定、采收率的确定、动态指标的预测等五个方面进行详细综述。针对水侵气藏早期识别时,综合对比了视地层压力法、采出程度法和视地质储量法,并给出不同方法的优缺点和使用范围。对于地质储量的确定,以异常压力气藏为例,说明了单单利用p/Z-Gp外推法得到的储量是不准确的,从物质平衡角度出发,给出了新的计算异常压力气藏地质储量的方法,并用实例进行了验证。     

加强早期马克思主义中国化整体研究

加强早期马克思主义中国化整体研究具有重大的理论意义和现实意义.检讨目前早期马克思主义中国化整体研究成果,存在诸多问题和不足,可以用发生学方法来架构早期马克思主义中国化研究,以加强早期马克思主义中国化整体研究.     

企业经营状况预警探讨

在宏观经济预警理论的基础上,借鉴宏观经济预警的方法,探讨了企业进行经营状况预警的方法,为企业领导者及时把握企业的经营状态提供一个新的思路.     

辽西南票地区早二叠世山西组孢子花粉组合

辽西南票地区山西组,共发现孢粉２１个属４７种。组合特征是蕨类植物孢子占优势,为孢粉总量的９７．４％;裸子植物花粉含量很少,仅占２．６％。根据孢粉含量及其在垂直方向上的变化,本组合自下向上划分成两个组合带：Ｓｉｍｏｚｏｎｏｔｒｉｌｅｔｅｓ－Ｓｉｎｕｌａｔｉｓｐｏｒｉｔｅｓ;Ｓｉｎｕｌａｔｉｓｐｏｒｉｔｅｓ－Ｌａｅｖｉｇａｔｏｓｐｏｒｉｔｅｓ。     

The Rb-Sr age and geological implication of alkaline syenitic complex from Liangtun-Kuangdonggou at Gaixian, eastern Liaoning Province

Liangtun-Kuangdonggou complex, 30 km southeast of Gaixian Town, Liaoning Province, is composed of aegirine-augite hornblende syenite, aegirine-augite syenite, hornblende syenite, pyroxene syenite and syeno-aegirinolite. Rb-Sr isotopic data to the complex are reported and used for discussion of chronology and geological implication. They show that the complex occurred in early Proterozoic and is a tectonic sign of extension setting. Moreover, the date indicates that the Liaohe Group, which is metamorphic wall rock of the complex, formed over 1 900 Ma ago.