矿物标本类型(型式)的正式定义     

皮.杰.邓  爵.阿.曼达理诺  郭宗山 《岩石矿物学杂志》1987,(4)

导言标准标本(type mineral specimens)是用以确定矿物种属的考证样品。在生物科学中很久以前就建立了标准标本制度,而在矿物学界直到最近才正式提出标准标本制。确实,有许多在古代和本世纪发现的矿物根本就没有标准标本。在这种情况下能得到的最多信息只是博物馆里卡片上或老的标签上的记载,如  相似文献   

基于GIS的城市地震灾害风险区划研究 ——以淄博市为例     

孙强  史清明 《四川地震》2020,(2)

按照"风险=危险性×脆弱性÷防震减灾能力"的研究思路为路线,以MapGIS为实施平台,基于地震区划的城市地震危险性评价方法,综合运用土地利用现状和断层活动分布指数的承载体脆弱性分析方法和专家打分法的城市防震减灾能力评价方法,对山东省淄博市的城市地震灾害风险区划进行研究。结果表明:淄博市的地震灾害风险性不高,中等风险区的面积占396%,低风险区的面积占1229%,极低风险区的面积占8375%,无极高风险区和高风险区。  相似文献   

回填区基础灌柱桩施工及检测     

唐汉新  徐清明 《岩土钻凿工程》1997,(4):138-144

本文简要介绍海上回填块石区摩擦灌注桩施工方法与质量检测。  相似文献   

沿岸流与海带养殖关系的研究 Ⅱ、流速对海带生长的影响     

张定民  缪国荣  杨清明 《中国海洋大学学报(自然科学版)》1986,(4)

本研究的第一部分,报告了山东省日照县石臼所湾海带养殖区的沿岸流的研究结果,提出了该海区海带养殖筏合理设置的措施。经过二年的生产证明,合理设筏(依主流轴向顺流设筏)后,改善了养殖区的流水条件,促进了海带的生长,减轻了风浪灾害,使该海区海带的产量得到提高。1980—1981年我们又在山东省荣成县俚岛湾,进行  相似文献   

沿岸流与海带养殖关系的研究：Ⅱ、流速对海带生长的影响     

张定民缪国荣  杨清明 《山东海洋学院学报》1986,16(4):180-186

本研究的第一部分，报告了山东省日照县石臼所湾海带养殖区的沿岸流的研究结果，提出了该海区海带养殖筏合理设置的措施。经过二年的生产证明，合理设筏(依主流轴向顺流设筏)后，改善了养殖区的流水条件，促进了海带的生长，减轻了风浪灾害，使该海区海带的产量得到提高。1980—1981年我们又在山东省荣成县俚岛湾，进行了不同流速条件下的海带生长与产量的定量试验，本文即报告此项研究的结果。  相似文献   

海带“单海1号”新品种的选育——用海带单倍体材料培育新品种     

方宗熙  崔竞进  欧毓麟  戴继勋  王梅林  刘启顺  杨清明 《中国海洋大学学报(自然科学版)》1983,(4)

海带是我国重要的养殖海藻。选育海带新品种进行养殖,可以提高产量和质量。60年代初期,鉴于当时所养殖的海带是杂种,山东海洋学院和科学院海洋研究所有关同志合作,对海带进行了遗传育种研究。他们采取的育种方法是从自然种群中选出个别优良个体,进行单棵采孢子,自交,然后从后代中选优培育,经过连续若干代的自交和定向选  相似文献   

Synthesis and Growth Process： A Tetrapod-Like ZnO Nanostructure   总被引：1，自引：0，他引：1  

皮振邦  苏小路田甜 裴芳杨超  田熙科 《中国地质大学学报(英文版)》2007,18(2):148-152

Three kinds of tetrapod-like ZnO nanostructures have been synthesized simultaneously via pure Zn chemical vapor deposition on silicon wafers with (111) orientation (Si (111)) at 920 ℃. X-ray diffraction indicates that the nanotetrapods are of wurtzite structure. The morphology and the microstructure of the nanotetrapods are investigated by the scanning electron microscopy. Selected area electron diffraction shows the growth direction, and energy dispersive X-ray spectroscopy reveals the atomic composition ratio of Zn/O. The growth process is briefly discussed. The optical property of the products was also recorded by means of photoluminescence spectroscopy.  相似文献   

Solvothermal Synthesis of CdSxSe1-x Nanorods by Polymer Gel-Controlled Growth Strategy     

杨超王龙艳  田熙科皮振邦华萍  赵燕喜 《中国地质大学学报(英文版)》2007,18(2):158-162

Alloyed ternary CdSxSe1-x nanorods have been synthesized by the thermal treatment of Cd2 -dispersed polyethylene glycol 2 000 gel (PEG 2000) with ethylenediamine solution of sulfur and selenium in a sealed system at 180 ℃ for 24 h, in which the ratio of S to Se in the nanorods was controlled by adjusting the relative amounts of the starting materials. Based on the results of experiments, it is found that the CdSxSe1-x nanorods were also synthesized with several sulfur sources by the method. X-ray diffraction (XRD) shows that the alloyed ternary CdSxSe1-x nanorods are highly crystalline, and no other phase was observed in these nanorods.  相似文献   

Neutral Leaching of Low-Grade Pyrolusite with High Silica Content     

郑建华罗红玉  田熙科王龙艳杨超  皮振邦 《中国地质大学学报(英文版)》2007,18(2):25-166,176

Leaching studies of low-grade pyrolusite, containing 11.84% Mn with high silicon, were carried out using sodium sulfite as a reductant in ammonium sulfate medium. Various process parameters including temperature, leaching time, solid-liquid ratio, quantity of ammonium sulfate, as well as the amount of reducing agent were studied in detail. The manganese extraction yield was the response of the process. Temperature and reagent concentration exerted the most important positive effect on the manganese extraction. The optimized conditions showed that when the amount of reducing agent was a stoichonmetric amount, over 90% manganese extraction and the lowest impurities were achieved, the amount of heavy metal impurities in the manganese leaching liquid was less than 5 mg/L, and almost no iron and aluminum were extracted in 3 mol/L ammonium sulfate concentration at 100 ℃ in 45 min.  相似文献   

又一种冷云成核引晶剂——“间苯三酚”     

B.B.皮奥特罗维奇 《气象科技》1976,(4):30-30

在1949-1950年间,公认的过冷云、雾的冰晶试剂是干冰、碘化银和碘化铅.其后,近25年间在无机物中只找到一种在一定程度上能代替碘化银和碘化铅的物质,就是硫化铜.为了在有机物中寻找引晶剂曾作过大量的试验,后来发现间苯三酚能起冰核的作用.间苯三酚即1、3、5苯三酚C_6H_3(OH)_3·2H_2O,是一种菱形晶体(a=6.79?,b=8.1?,c=13.7?),在温度110℃时失去结  相似文献