冬季花卉无土育苗栽培生产技术试验

通过有采暖设施日光温室相同基质不同育苗设施花卉扦插育苗和相同育苗设施有机生态基质与营养土基质花卉扦插育苗试验，得出双膜弓棚大畦营养纸钵育苗设施不仅有显著的增热保温效果，而且较小的昼夜温差相对延续并减少了弓棚内插德根部基质的热量流失，为植物根系生长提供了有效的热量条件。采用冬暖日光温室内套双膜弓棚大畦营养纸钵花卉育苗，使供试花卉扦插至成苗移栽或上盆期缩短45—46d，≥10℃积温减少700—770℃日，扦插成活串提高了6个百分点。     

Environmental changes reflected by the lake sediments of the South Hongshan Lake, Northwest Tibet

The 1.07-m long lake core with 1 cm interval cutting, which was obtained by drilling in the South Hongshan Lake of Northwest Tibet, was dated by the 210Pb and 137Cs methods, and a 150-year consecutive lake sedimentary sequence (1840─1997) with 1.4 year resolution was obtained. Some environmental proxies, such as the total organic carbon (TOC), total nitrogen (TN), ratio of TOC to TN (TOC/TN), trace chemistry elements (TCE), CaCO3, grain size, richness of ostracoda etc. showed that they are of well coincidence. These results implied that the environmental background varied from the cold-wet period in the late 19th century, to the warm-wet period from the end of the 19th century to the 1920s and to the warm-dry period since the 1920s. There were sub-variations since the 1920s: the cold-dry/warm-wet fluctuation from 1922 to 1960, the intensively warm-dry period since 1960 with a short cold-wet period in the mid-1970s to the end of the 1980s. The humid period from the mid-1970s to the end of the 1970s and the dry period beginning from the early 1980s were well documented by climatic data of the nearby weather station records while the grain size was well correlated to the annual precipitation. Compared with the records from Guliya ice core in the same area, the TOC proxy in the lake core indicating warm/cold conditions well corresponded to the ( 18O records representing temperature variations in the ice core. However, the proxies with dry/wet significance in the lake core were different from the variations of snow accumulation reflected by the ice core. It can be concluded that the chosen environmental proxies have clear environmental significance and the lake sediments can reflect climatic and environmental changes at high-resolution.     

举起法律之剑——唐县国土资源局矿业整顿纪实

悠悠太行山，绵延几千里，松林翠柏，潭水溪涧，怡人的自然景观，令人心醉神迷。目前，笔者随唐县国土资源局执法监察人员沿着太行山东麓进到莽莽山野，不禁为鬼斧神工的天地造化折服。站在身边的执法监察人员说：“看到这迷人的景色，呼吸到沁人心脾的空气，给我们的最大感受就是绝不能让乱采滥挖者肆意妄为。”     

若干固体材料脆-延性转变及宏观结构的实验研究

石灰岩、石蜡-松香-水泥粉混合物和环氧树脂等固体材料室温下的压缩变形实验表明,随着围压的加大和材料可塑性的增强,试件破坏形式由脆性转变为延性,在宏观结构上表现为从脆性单斜破裂、半脆性共轭破裂,到半延性和延性网状流动,以及延性均匀流动的转变.材料屈服后在应力-应变曲线上所出现的平缓段或应变硬化段对应着试件中的网络状或均匀塑性流动;随着应变的增大,当出现负坡或坡度减小现象时,则标志着试件内宏观破裂的贯通,在宏观破坏结构上往往表现为共轭流动网络与共轭破裂网络的重叠,前者网带近似正交,后者斜交.蠕变实验进一步表明,稳态蠕变幂次流动律的应力指数n 值的大小反映了试件不同的宏观流动结构:网络状流动,n 显著大于1,为非牛顿流;均匀流动,n 等于或近似于1,为牛顿流或近似牛顿流.     

孔隙压岩石三轴摩擦实验装置

孔隙压岩石三轴摩擦实验装置是研究孔隙压对岩石滑动面摩擦性状影响的专用设备.该设备包括孔隙压岩石三轴实验装置和岩石摩擦装置两部分.摩擦装置由上、下压头,密封套筒和具有内部滑动块体的岩石样品组成.滑动面宽20×20mm、高40mm 的长方体,滑动面宽20mm、高30mm.最大孔隙压P_(max)=100MPa,最大位移L_(max)=10mm.应用该装置将三轴条件下样品之间的斜向摩擦滑动变为轴向滑动.滑动面上的法向压力σ_n=σ_3,即σ_n 变为与轴压无关的独立变量.     

CZ—1型标定信号发生器

ＣＺ－１型标定信号发生器是根据国家根据国家地震局“遥测地震台网观测技术规范”和对地震观测台站的要求而研制的。它可以在地震观测现场用于对地震诸放大记录系统标定测试，也可用于实验室对放大器，滤波器等进行测试和维修，与其它常规信号发生器相比，更能满足地震局系统的需要。     

VISIBILITY AND TELEPHOTOMETER

This paper discusses the possible error of the calculation of the atmospheric extinction coefficient by the Koschmieder visibility formula. An analysis of the problem shows that an error of 10% can be introduced in the measurement if the target used is a non-blackbody. By using the telephotometer as a tool of measurement, such an error can be markedly reduced.     

浙江湖南镇水库1982年5月22日3.1级地震序列的近场地声观测和初步研究

本文介绍湖南镇水库1982年5月22日ML=3.1级地震序列的近场地声观测和初步研究结果。观测表明:每一次地震都伴随地声。地声系相应地震事件辐射的高频弹性体波。其经由地面透射与空气耦合后形成可听地声。地声活动性在3.1级主震前后呈明显的阶段性变化特征。地声频率为60——250Hz,其加速度功率谱主频率fD为80——150Hz。研究了主频率的时间序列,发现前震期地声主频率由高值向低值转移,主震时达极低值。余震期内,主频率则由低值向高值回升,fD与ML呈幂函数关系fD=130.7(ML+2)-0.3。研究表明,地声主频率与时间、震级的相关性主要取决于震源破裂尺度,同时也与震源介质的应力状态和品质因数Q值变化有关。3.1级地震序列的近场地声观测和研究结果,与近年来国内外岩石破裂过程与声发射活动性和波谱特征的实验研究结果颇为一致。它表明,在矿山和地震活动区进行近场地声连续观测和实时分析,对岩爆和地震过程的预测有重要意义。      

浙江湖南镇水库地震序列的近场地声观测和初步研究

本文介绍湖南镇水库3.1级地震序列的近场地声观测和初步研究结果。观测表明,每一次地震都伴随地声;地声系相应地震事件辐射的高频弹性体波,透射到空气中的可听地声;地声活动性在主震前后呈明显的阶段性变化特征;地声频段为50～250赫兹,其加速度功率谱主频率f为80～150赫兹。研究表明,地声主频率与时间、震级的相关性主要取决于震源破裂尺度,同时也与震源介质的应力状态和品质因数Q值变化有关。3.1级地震序列的近场地声观测和研究结果与近年来国内外由岩石破裂过程与声发射活动性和波谱特征的实验研究结果颇为一致。     

云南勘查地球化学发展及应用效果

云南省应用地球化学勘查已有50年历史，积累丰富的地球化学资料，取得突出成果，在矿产勘查中发挥了重要作用，也为成矿预测、基础地质研究提供可靠资料，并运用于环境、农业等领域。