quaternary

1. In this paper experiments of image segmentation on Quaternary strata are made on RS image by morphologic methods.
   利用数学形态学的方法对遥感影像的第四系地层进行了影像分割实验。
2. The equilibrium phase diagram and the density-composition diagram of the quaternary system were plotted using experimental data.
   依据实验测定的平衡溶解度数据及对应的平衡固相，绘制了该四元体系的平衡相图及其密度-组成图。
3. The silt in the Yellow River Delta mainly belongs to the quaternary deposits.
   黄河三角洲粉土主要为第四纪散河流堆积物。
4. Results indicated that organic bentonite could be prepared firstly by Na-modification and then by quaternary ammonium treatment.
   研究表明，采用天然钙基膨润土通过钠化提纯、季铵盐有机改性的方法，可以制备出性能优良的有机膨润土。
5. Study on Synthesis and Properties of Multi Quaternary Ammonium Surfactant
   多季铵盐表面活性剂合成与性能研究
6. The Lower Liaohe River Plain, in Panjin city Liaoning province, has plenty of Quaternary brine resources, with the huge exploitation potential.
   辽宁省盘锦市辖区内的下辽河平原储藏了丰富的第四纪卤水资源，开采潜力巨大，有必要对其进行特征分析和资源评价。
7. With the uplift and Quaternary climate change, the Yulong mountain engendered four plaeoglaciations and has grown modern glaciers.
   在山体上升和第四纪气候变化的背景下，玉龙山产生了四次更新世冰川作用，并发育有现代冰。
8. Based on the binary mono-stable flip-flops, this paper proposes the design of quaternary mono-stable flip-flops.
   在二值单稳态触发器设计的基础上，提出了四值单稳态触发器的设计方案。
9. Geochemical characteristics of the Miocene eolian deposits and comparison with the Pliocene and quaternary eolian deposits
   中新世风尘堆积的地球化学特征及其与上新世和第四纪风尘堆积的比较
10. At the same time, the standard Quaternary stratigraphic system of the North China Plain had been established on the basis of previous study.
    与此同时，结合前人的研究成果，建立了华北平原第四纪地层的标准模式地层层系。
11. Active Characteristics Study of Major Faults in the Subei Region in the Late Quaternary
    肃北地区主要断裂晚第四纪活动特征研究
12. Sprinkler section valve Those correspond to Quaternary, Pliocene, Upper Miocene, Lower Miocene and Eocene respectively.
    喷水灭火系统分段阀分别为第四系、上新统、中新统上段、中新统下段及始新统。
13. The study of the glacial interglacial paleoproductivity evolution during late Quaternary in the bay of Bengal
    孟加拉湾晚第四纪冰期和间冰期古生产力演变研究
14. Research on the Quaternary fine-fraction lithofacies and sedimentation model in Tainan Area, Qaidam Basin
    柴达木台南地区第四系细粒沉积岩相与沉积模式研究
15. The Quaternary is also characterized by the emergence of the environment.
    第四纪也以人类的出现和人类开始对环境的改造为标志。
16. An antistatic agent of polyacrylamide quaternary ammonium compound was designed and synthesized.
    设计合成了聚丙烯酰胺季铵盐类的抗静电剂。
17. Progress and problems of Quaternary glaciation and loess study in the midwestern United States
    美国中西部第四纪冰川与黄土研究的进展和问题
18. These supply a new information for the evolution of the Qinghai-Tibet Plateau lakes, climate change research and the division and correlation of the Quaternary strata.
    为青藏高原湖泊演化、气候环境变迁研究及第四纪地层的划分与对比提供了新资料。
19. The classification, naming and field description are introduced of the Tertiary and Quaternary rocks from monitoring shaft hole.
    介绍了井简检查孔第三、四系岩土的分类、定名和野外描述。
20. Quaternary Geosciences and Human Survival
    第四纪地球科学和人类生存
21. Organic complexes of montmorillonite were prepared by modifying montmorillonite with certain quaternary ammonium.
    对无机膨润土进行了聚胺改性，得到有机复合膨润土。
22. Research Progress in Preparation of Chitosan Quaternary Salts and Their Application
    壳聚糖季铵盐的制备与应用研究进展
23. Quaternary sector of the economy: Involves the research and development needed to produce products from natural resources.
    第四纪的经济部门：涉及的研究和发展生产所需的自然资源。
24. The quaternary period of geologic time extends from the end of the tertiary period to the present.
    地质时期中的第四纪是从第三纪一直到现在。
25. Several polyoxyethylene type quaternary ammonium salt cationic surfactants were selected to investigate their interaction with acid dyes and influence on the dyeing properties.
    摘要选择了几种聚氧乙烯型季铵盐阳离子表面活性剂，探讨了这些表面活性剂与酸性染料的相互作用以及对染料染色性能的影响。
26. This discovery provides important data and evidence for establishing the climatic stratigraphic sequence and division and correlation of the Quaternary glacial period on the Qinghai-Tibet plateau.
    为青藏高原建立气候地层层序、第四纪冰期划分对比提供了重要的实际资料和依据。
27. Based on the analysis of the late Cenozoic stratigraphy, neotectonic topography and the structures of Quaternary in the region, the present paper studies the neotectonic characteristics of the region systematically.
    通过对晚新生代地层、构造地貌及第四系内褶皱和断层的综合分析，阐述了区内新构造活动特征。
28. Four new types of organic siloxane surfactants with quaternary ammonium group have been obtained.
    通过多步骤合成了四种含有季铵基的有机硅表面活性剂。
29. The orebody occurred below Quaternary, mineralization is closely related to tectonic activity and alteration.
    矿体赋存于第四系之下，矿化与构造活动及蚀变密切相关。
30. The results show that the quaternary ammonium cationic group of the modified products can better treat perchlorate in water.
    结果表明，改性产物表面的季铵阳离子基团能较好地吸附废水中的高氯酸根；

noun

1. the cardinal number that is the sum of three and one

   Synonym:    four4IVtetradquaternquaternionquaternityquartetquadrupletfoursomeLittle Joe

adj

1. coming next after the third and just before the fifth in position or time or degree or magnitude
   1. the quaternary period of geologic time extends from the end of the tertiary period to the present

   Synonym:    fourth4th

2. consisting of or especially arranged in sets of four
   1. quaternate leaves
   2. a quaternary compound

   Synonym:    quaternate