排序方式： 共有6条查询结果，搜索用时 93 毫秒
1
1.
The diverse clam shrimp Nestoria-Keratestheria fauna is widely distributed in the Dabeigou Formation in northern Hebei and eastern Inner Mongolia of China.Its important component genus Magumbonia from the Dabeigou Formation in the Luanping Basin,northern Hebei,China,is revised on the basis of a scanning electron microscope (SEM) examination of the type species M.jingshangensis Wang,1984,which revealed morphological features not recognized previously.These include coarse reticulation on the umbo and promi... 相似文献
2.
作者通过T1—In-S三元系实验研究,在300℃等温面上发现4个三元固溶体相和2个三元相。4个三元固溶体相的成分变化范围分别是:(Ⅰ)T1_(2C)InS_(16)-T1_(40)In_3S_(33);(Ⅱ)T1_4InS_5—T1_4InS_4;(Ⅲ)T1_8In_2S_7—T1_(15)In_3S_(11)和(Ⅳ)T1_2In_2S_5。2个三元相的成分分别是T1_3InS_3和T1_2In_2S_3。这些相之间的关系清楚地示于T1-In-S相图中。此外,在600℃时合成了三元相T1In_2S_3,并对前人的实验研究进行了补充和修正。 相似文献
3.
4.
We report results of our optical photometric observations of ten gamma-ray loud blazers, namely: 0219+428 (3C66A), PKS 0420-014 (OA 129), S5 0716+714, 0754+100 (OI 090.4), 0827+243 (OJ248), 1652+398 (Mrk 501), 2200+420 (BL Lacertae), 2230+114 (CTA 102), 2251+158 (3C 454.3) and 2344+514. The observations were carried out in September-October, 2000 using the 70 cm optical telescope at Abstumani Observatory, Georgia. We found intra-day variations in 0420-014, S5 0716+714, BL Lacertae and CTA 102. A variation of 0.3 magnitude over a time scale of about 3 hours was observed in the R passband in BL Lacertae on JD 2451827. We did not detect any variation in 3C 66A, Mrk 501, or 3C 454.3 during our observations. Nor did we detect any clear evidence of variation in 1ES 2344+514 during our two weeks' observing run of the TeV gamma-ray source. 相似文献
5.
作者系统地进行了Tl—Ga—S三元系的合成实验研究。在300℃等温面上,发现了四个新相,Tl_4GaS_5为三元纯相,Ⅰ、Ⅱ、Ⅲ为固溶体相区,其成分变化范围分别是:(Ⅰ)Tl_(20)GaS_(16)—Tl_(20)Ga_2S_(17),(Ⅱ)Tl_(10)Ga_6S_(17)—Tl_5Ga_3S_7,(Ⅲ)Tl_2Ga_2S_5—TlGaS_2。此外,在630—900℃还存在一个成分为TlGa_5S_8—Tl_2Ga_(10)S_(11)的固溶体相。对这些新相均进行了X-射线粉晶衍射、光性及某些物性测试。X-射线粉晶衍射数据已进行了指标化。 相似文献
6.
1