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Thirdly, the ratios of Chenopodiaceae/Artemisia and Betula/Artemisia, which are good indices for moisture, exhibit a significant increase and a sudden decrease, respectively, at ～4.5 Ma.

青藏高原在～4.5Ma发生的隆升可能是导致这次亚洲内陆干旱化的主要驱动因素，高原对暖湿气流的屏障和加强季节性反差可能是导致干旱化的重要途径。

The main conclusions of this thesis were as follows: 1 Through compared the original peaks, relative concentration distribution and diagnostic ratios of normal alkanes,Naphthalene, Dibenzothiophene, Fluorene, Phenanthrene, Chrysene and their alkyl PAHs, terpane-sterane biomakers of five crude oils, it was confirmed that five single crude oil was unmatched each other.

通过正构烷烃、萘、菲、芴、二苯并噻吩、屈及其烷基化系列多环芳烃、甾萜类生物标志物的原始谱图比较；组分浓度的分布模式比较；诊断比值的比较；对5种不同地质层次的原油进行了鉴别，结果表明5种原油均为独立油样，这与实际情况相符和；t检验分析的使用，使得溢油鉴别更加科学化，定量化；SPSS模糊聚类的使用，使得各油样之间&亲疏远近&的关系，即&属于的程度不同&的概念得以充分表现；明确了&是非&分明的概念。

To explore the climatic implication of compound-specific hydrogen isotope ratios of sedimentary n-alkanes, the author sampled shallow sediment cores respectively from the climatically and environmentally distinct basins Qiangyong Glacier Lake,Kongmu Co Lake,Nam Co Lake, Keluke Lake and Xiao Qaidam Lake along a S-N transect on the Tibetan Plateau for the extraction and analysis of these biomarkers.

本文分别在青藏高原南部的大枪勇错、空姆错，中部的纳木错以及东北部的克鲁克湖和小柴达木湖钻取了浅岩芯，通过对沉积物中正构烷烃的提取分析和单体氢同位素比值的测定来探讨该类生物标志物单体δD值的气候指示意义。

A mixing performance analysis on the different screw configuration in the process of twin screw codirectional extrusion;2. The filling ratios in the main reactive zones were estimated by clam barrel for different screw configuration s.

研究了不同螺杆构型下的充满度以及低密度聚乙烯熔融接枝马来酸酐的过程，探讨了不同螺杆构型下充满度与接枝反应挤出过程的关系。

The influence of polarization variation of one pump beam on the performance of a "bridge" mutually pumped phase conjugator has been investigated The reflectivity, transmission, and response time were measured for different polarizations and different intensity ratios of input beams.

3讨论了在&桥&式互泵浦相位共轭器中泵浦光偏振态的改变对相位共轭器输出特性的影响。

It is shown from the assessment results that (1) both the TN and TP fluxes discharged from the Changjiang River to the Changjiang River estuary sea area increased continuedly, the DIN concentration in the sea areas increased continuedly, and the Si concentration decreased continuedly, which resulted in the significant changes in N/P/Si ratios;(2) the chlorophyll a concentration in the sea areas increased continuedly, and the significant changes in community structure of phytoplankton occurred;(3) the species and biomass of benthos declined greatly, and the bottom oxygen-poor water area increased significantly;(4) the range and occurrence frequency of red tide events in the sea areas increased greatly, and the algal toxic infection events of mussel were frequently found in the sea areas.

结果表明，长江向长江口海域输送总氮和总磷通量持续增大，长江口及其邻近海域无机氮浓度持续增高而硅浓度持续下降，并由此导致N/P/Si与比值的显著变化；该海域叶绿素a浓度持续增大，浮游植物群落结构也发生了显著变化；该海域底栖生物种类和生物量都大大减少，底层水低氧区面积也显著扩大；该海域赤潮事件无论是规模还是频率都大大增加，藻类毒素DSP/PSP贻贝传染事件也时有发生。

Different molar ratios of magnesia cement raw materials were controllably prepared at the inlet temperature of 750℃ by changing the feeding rate of hydrate magnesium chloride.

探讨了影响流态化法热解水合氯化镁的主要因素，在进口温度750℃下，改变进料速度，可控地制备了不同摩尔比的镁水泥原料。

Various mole ratios of acrylonitrile and methyl methacrylate were used to copolymerize in aqueous solution by Redox and the copolymers were obtained. The copolymers containing MOCT were synthesized by adding MOCT before copolymerization. The copolymer were derived from the copolymerization of AN and MMA in 30L kettle and then were mixed with various contents of MOCT, the copolymer films were cast by solution of the copolymer containing MOCT.

本课题采用不同摩尔比的丙烯腈和甲基丙烯酸甲酯进行水相沉淀聚合，制备了AN／MMA共聚物；在聚合阶段加入正十八烷微胶囊，制得了正十八烷微胶囊含量不同的共聚物；选择合适的条件进行大釜聚合，得到共聚物后与不同比例的正十八烷微胶囊混合，通过流延制得正十八烷微胶囊含量不同的共聚物膜；并尝试进行了纺丝实验。

Specifically measured cosmogenic 3He/21Ne ratios, on the same samples, is powerful for evaluating the validity of calculated cosmogenic 3He and 21Ne surface exposure ages.

对同一样品进行具体的3氦/21氖比例测定，是评价3氦和21氖表面暴露时间计算值有效性的有力工具

The influence of acid curin g, solid-liquid ratios, activation time on the products properties were analyse d.

对原矿进行捣浆提纯后，用16％～20％的硫酸溶液对膨润土进行活化，活化时间 6～8小时，固液比1∶2。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。