对单摆实验中计时周期的误差分析

对单摆法测重力加速度ｇ的误差主要来源－－周期的测量误差进行分析，并结合实验给出了周期测量计时误差的主要来源及最大计时误差随周期变化的范围。     

果树滴灌自控系统的设计与试验

研究试验的滴灌自控系统,用于农田、果园、塑料大棚、温室及草坪绿地灌水,根据果树物候期的生长需要,可实现果园科学自动给水。本系统采用真空表张力计和光导纤维传感器,可做为普及推广滴灌和喷灌的配套设备。     

膜式机械通风横流冷却塔节能研讨

横流塔由于气水对数平均焓差较小。故在同参数下冷却数较逆流塔大,通常设计中电耗约高46％左右。本文从分析气流在填料中流态出发,探讨填料的相对凸起、风速与传质强度、能耗及投资间关系。由于在一定冷却数下,填料体积与传质强度成反比,前者与塔投资有关,后者当填料间距远小于其长度及高度时,可近似认为仅与填料形状及风速有关,即与能耗有关,故按投资回收期来选择填料形式并决定经济风速才是合理有效的节能方法。样塔提供较原塔节能65.7％的实例。本文亦可供膜式逆流塔参考。     

稻草制取多羟基化合物的探讨

本文探讨将农业废料稻草纤维素水解、发酵,制多羟基化合物的原理及方法。     

云南南沱组杂砾岩的成因及沉积相

作者对滇中震旦系,特别是下震旦统南沱组紫红色杂砾岩的成因和南沱期沉积相进行了较深入的研究,认为云南的南沱组杂砾岩既不是冰川搬运物质直接堆积的,也不是单纯的泥石流成因,而是兼具两者的某些特征。其沉积相的展布有从陆到海、从浅到深的特征。     

温度变化对牡丹花期影响的研究

通过几年来牡丹开花物候期２月至４月温度的观测与分析，探讨了牡丹开花物候期与旬平均气温、有效积温间的关系，并模拟了２月１０日后各物候期发育天数与其有效积温间的幂函数曲线模型，为牡丹适宜花期温度控制措施的制定提供了依据。     

Tectonic types and evolution of Ordovician proto-type basins in the Tarim region

The Ordovician system is an important target for exploration in the Tarim Basin. Restoration of the Ordovician tectono-depositional environment is a key basis for the study of the structural development history in Tarim block and the prediction of the favorable Ordovician reservoir belts （zones）. Based on the surrounding tectonic settings, the litho-facies and sedimentary fill, the palaeo-geography, palaeoclimate and palaeo-ecology, and the structural deformation and magmatic eruptions, in this paper we combine the sedimentary fill in the basin with the development of the surrounding orogenic belts and re-build the proto-type basins of the different Ordovician periods. During the Ordovician period, the Tarim region was characterized by the composite of the interior cratonic depression with the peripheral cratonic depression. The interior cratonic depression in the central and western parts is mainly the deposiUonal area of the platform facies while the peripheral cratonic depression in the eastern part is mainly the zone of deepwater basin facies, with the slope acting as the transition belt between them. During the Late Ordovician period, the closure of the Northern Kunlun Ocean and destruction of the trench-arc-basin system in the Altyn Tagh region put the southern part of the Tarim block under com- pression and uplifting and turned the central and western parts of the carbonate platform into the mixed deposiUonal continental shelf. The eastern region of the basin had the over-compensated flysch sedimentation with huge thickness, marking the drastic turn of the basin nature. The basin tectonic framework turned to the south-north differentiation of the Silurian period from the east-west differentiation of the Ordovician period.     

略论中国共产党在抗战时期对民族精神的继承和弘扬

中国共产党在抗战中筑成的具有"中国作风"和"中国气派"的精神长城,实现了民族精神承上启下、继往开来的历史性跨越,成为战胜日本帝国主义侵略的精神法宝和强大动力,为中华民族的伟大复兴奠定了坚实的思想基础。     

中国北方侏罗纪孢粉组合序列

中国北方陆相侏罗系分布广泛,发育完全,各类化石丰富,是研究侏罗系地层的艮好场所。本文根据多年来积累的孢粉化石资料和近期对山东、河北部分地区侏罗系孢粉化石的研究,将该区由下而上划分为早侏罗世晚期、中侏罗世早期和晚期、晚侏罗世早期和晚期五个孢粉组合带。目的是通过孢粉组合带的建立,能对我国北方陆相侏罗系的化分提供一些化石依据。