南海西缘断裂带右行走滑的地球动力学机制

南海西缘断裂带,北端始于17°30'N附近的海南岛南部,往南延伸止于北西走向的卢帕尔断裂,南北延伸长度约达1 600 km,十分壮观(见图1)。该断裂带除了其名称和延伸长度在不同研究者的文章中各有所不同[1—4]之外,其名称和作用至少在20世纪80年代初已得到广泛的应用,早已成习惯,如在《亚洲地质》[5]一书和杨树康等[1]、陈国达[4]等许多著名科学家的论著中不断地得到了应用。该断裂带的构造地位和作用得到地学界的普遍重视,到目前为止地学界基本上认为它就是印支亚板块与南海亚板块之间的区域性边界断裂。     

BTEX anomalies used as indicators of submarine oil and gas reservoirs

It is a conventional method for petroleum prospecting to generally use paraffin hydrocarbon as basic indexes of oil and gas. This conventional geochemical technology, however, shows some limits in the prospecting as paraffin is vulnerable to influences from human and biologic activities. Consequently, BTEX (short for benzene, toluene, ethyl benzene and xylem, which are direct biomarkers) among aromatic hydrocarbon series has been taken into account for the oil and gas prediction. Domestic and foreign study results demonstrate that BTEX is hardly disturbed and can well indicate oil and gas reservoirs. Based on measured data from a South China Sea area, the present authors have used self-developed visual assessment software for petroleum prospecting has been used to process data, strip background anomalies, and outline significant BTEX anomalies. By comparison with stratigraphic profiles of the target area, it is confirmed that BTEX is a good indication of marine oil and gas during the petroleum prospecting.     

蛋白质营养对高密度养殖凡纳滨对虾生长与免疫力的影响

在高密度养殖条件下,进行单因素随机设计动物试验.用5种饲料(蛋白质水平31%、35%、39%、43%、47%,以A～E组表示)分别投喂平均体质量6.2 g+0.2 g、平均养殖密度3.1 kg/m3的凡纳滨对虾(Litopenaeus vannamei),探寻蛋白质营养对虾生长、免疫、水质、抗胁迫的影响特征.结果表明:(1)中高蛋白质水平具有显著促进对虾生长的效果,随着蛋白水平的提高,特定生长率先增加后降低,饲料系数正好相反,D组两指标最佳,分另q为110.98%和2.54;C、D、E组差异不显著.(2)中高蛋白质水平有利于提高对虾多数免疫指标的活力,血淋巴中血细胞浓度、T-AOC活力、POD活力、总蛋白含量、白蛋白、血蓝蛋白含量,随着蛋白质水平提高先增加后降低,前5指标含量均以D组最高,比A组显著提高16.8%～33.9%;而血蓝蛋白含量C组最高,比A组提高15.0%.(3)高蛋白质水平有利于提高对虾SOD活力,也显著增强抗低盐胁迫的能力,但同时极显著加大了水环境中氨氮和亚硝氮的污染.(4)在我国北方集约化高密度养殖条件下,凡纳滨对虾中后期生长阶段适宜的饲料蛋白质营养水平为39%～43%.     

�ִ�����˶����������᣻�ϵ��о�

???????????????????????????鹹????????????μ?????????????????????????????????????μ??????????????????1?????????????????????????????2???????????????μ????????????γ???????￡???80??????????????????????????????????????????μ???????????????60???????3??????????????????????????????????????????????????????????????????????С??????????????????μ????????????????????????4???????????????????й?????γ??????????????????????????     

浅析道德情感在道德修养过程中的作用

道德情感作为人类特有的一种高级情感,是人类道德心理中最深沉又最活跃的内容,同时又是人们完善自己的一个方面。在道德实践活动中,道德情感和道德意识诸要素之间有着紧密的联系,着重论述道德情感在人的道德修养过程中的重要性。     

企鹅珍珠贝游离珠培育技术的初步研究

2006 年 5 - 12 月,在广东省、湛江市、徐闻县芳华珍珠养殖场,采用贝龄 2 ～ 4 a 的企鹅珍珠贝作植核贝,以 1 ～ 3 a 贝作小片贝,进行游离珍珠培育试验.结果表明,植核母贝经 15 ～ 40 d 的术前处理,成活率为 95.33 % ～ 97.00 %;施术贝经过 6 个月培育后,吐核率为 63.00 % ～ 71.88 %,死亡率为 26.17 % ～ 35.00 %,成珠率为 1.95 % ～ 3.33 %.企鹅珍珠贝合适的植核母贝为 2 ～ 3 龄贝,小片贝为 1 ～ 2 龄贝.     

ICESat-2激光卫星与光学遥感影像融合水深测量

针对浅海测深的数据特点和应用需求,以我国南海甘泉岛为例,研究了利用ICESat-2(Ice,Cloud,and Land Elevation Satellite-2)激光卫星数据和光学遥感影像开展主被动融合水深测量的方法。首先通过信号点提取、水面/水底识别、水下点折射改正等步骤处理ICESat-2数据,获得水深值,随后以激光点作为控制,计算光学水深反演模型参数,最后由点及面地获取大范围高精度水深。实验表明,甘泉岛区域主被动融合测深中误差优于1.30m,基于激光卫星数据的主被动融合测深方法能够为浅水水深测量提供新手段。     

Binary Star Fractions from the LAMOST DR4

Stellar systems composed of single, double, triple or higher-order systems are rightfully regarded as the fundamental building blocks of the Milky Way. Binary stars play an important role in formation and evolution of the Galaxy. Through comparing the radial velocity variations from multiepoch observations, we analyze the binary fraction of dwarf stars observed with LAMOST. Effects of different model assumptions, such as orbital period distributions on the estimate of binary fractions,are investigated. The results based on log-normal distribution of orbital periods reproduce the previous complete analyses better than the power-law distribution. We find that the binary fraction increases with Teff and decreases with [Fe/H]. We first investigate the relation between α-elements and binary fraction in such a large sample as provided by LAMOST. The old stars with high [α/Fe] dominate with a higher binary fraction than young stars with low [α/Fe]. At the same mass, earlier forming stars possess a higher binary fraction than newly forming ones, which may be related with evolution of the Galaxy.     

Cu3 N弹性和热力学性质的第一性原理研究

利用基于密度泛函理论的第一性原理全势线性缀加平面波方法,研究了立方反ReO₃结构Cu₃N在零温(0 K)零压下的平衡晶格常数、体弹模量及其对压强的一阶导数,计算结果与其他实验及理论结果基本相符. 同时得出Cu₃N的弹性常数,Poisson比等,并分析出Cu₃N在零温零压下是稳定的. 通过准谐Debye模型计算Cu₃N的热力学性质,得到了Cu₃N的晶格常数、等压比热容、等容比热     

Ka波段毫米波云雷达对青藏高原东南缘降水回波的分析

利用丽江站新建的Ka波段毫米波云雷达获得的高时间分辨率的垂直观测资料,结合同址的地面自动气象站和雨滴谱的分钟数据、常规探空数据和附近C波段天气雷达的强度回波,分析了两次降水过程前后云雷达反射率因子Z、径向速度V_r、速度谱宽S_w的垂直变化规律。分析表明:在发生弱降水时,云雷达Z在垂直方向的变化不明显;但V_r、S_w值在0℃层稍低位置有一个明显的分界层(融化层),粒子通过融化层后V_r、S_w都是快速变大,这个变化主要是粒子的相态由固态变成液态引发的,可以通过V_r、S_w突变值的位置来识别0℃层亮带的高度。从C波段天气雷达回波强度、剖面图及云雷达位置的时间-高度图看,对毛毛雨和小雨的回波,强度和高度差异比较明显,毛毛雨比小雨回波高度低、强度弱,与云雷达相比C波段雷达对高一些的云观测不到,对距离较远的弱降水回波无法观测到;由于相同粒子对不同波长电磁波的散射不一样,造成两种雷达垂直方向观测到的Z变化不同。对比弱降水回波,云雷达在...