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海洋碎屑
相关语句
  marine clastic
     CLASSIFICATION OF MARINE CLASTIC SEDIMENTS
     海洋碎屑沉积物的分类
短句来源
  marine detrital
     SPECIFIC NUTRIENT TRANSFORMATION PROCESSES AND CHANGE IN DEHYDROGENASE ACTIVITY DURING FORMATION AND EVOLUTION OF MARINE DETRITAL MICROZONE
     海洋碎屑小生境形成演化过程中营养盐特殊迁移过程及脱氢酶活性的变化
短句来源
  “海洋碎屑”译为未确定词的双语例句
     A careful review is made by the authors of the classifications proposed by Shepard and Folk et al. The Shepard classification is no longer acceptable because of its lack of the function of interpretation. Folk's classification has advantages and is widely accepted by many countries in marine geological survey.
     比较研究了以 Shepard和 Folk等为代表的海洋碎屑沉积物分类方案 ,提出沉积物的分类应兼具描述与解释两种功能。
短句来源
  相似匹配句对
     CLASSIFICATION OF MARINE CLASTIC SEDIMENTS
     海洋碎屑沉积物的分类
短句来源
     BLUE OCEAN
     蓝色的海洋
短句来源
     Marine Toxins
     海洋生物毒素
短句来源
     Evaluation and calibration on the detrital contamination to biogenic opal of marine sediments by alkali leachate methods
     碱提取法分析海洋沉积物生物硅方法中碎屑组分污染的评估及校正
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  marine clastic
The feeder breccia occupies a major northwest-dipping reverse fault zone between dominantly greenschist-facies phyllite and schist of the Upper Proterozoic Toshint Formation and unmetamorphosed marine clastic rocks of the permian Ulz Formation.
      
Fragment of a basin filled with deep-marine clastic deposits in either an orogenic forearc or backarc setting.
      
This makes the area highly appropriate for a field trip to discuss competing models of deep-marine clastic sedimentation.
      
The southeastern margin of the Alberta basin has early generation biogenic gas in Cretaceous, marine clastic reservoirs.
      
  marine detritus
The mixed cereal was used, even though it is not a natural marine detritus, to assure uniformity of food quality with time.
      


Fragile and flocculent detrital aggregates in the sea known as marine snow are ubiquitous and abundant components of the sea environment, an important site of phytosynthesis and nutrient regeneration. Detrital microzones as unique microenvi-ronments in oceanic waters support biochemical properties distinct from the ambient (such as high metabolic activity), and play an important role in the flux of energy and matter. This investigation on the specific nutrient transformation processes and change in dehydrogenase...

Fragile and flocculent detrital aggregates in the sea known as marine snow are ubiquitous and abundant components of the sea environment, an important site of phytosynthesis and nutrient regeneration. Detrital microzones as unique microenvi-ronments in oceanic waters support biochemical properties distinct from the ambient (such as high metabolic activity), and play an important role in the flux of energy and matter. This investigation on the specific nutrient transformation processes and change in dehydrogenase activity during the formation and evolution of the detrital microzone revealed the simultaneous presence of the processes of nitrification, den-itrification, and accumulation of high concentration of NO2- in aerobic waters. Dehydrogenase activity (DHA) reached maxium on the 4th day and oscillation of DHA occurred around the 92nd and 192nd day. The paper pointed out that marine detritus surfaces not only support a succession of microbial communities but also undergo successional change in non-equilibrium processes. When organic compounds are oxidized and the resulting depletion of O2 leads to the formation of a redox gradient and a reduced microzone on the detritus surface, NO3-, SO42-, CO32- may serve as terminal electron acceptors of respiration in the reduced region during evolution of microzone. The redox gradient of the detrital microzone allows aerobic and anerobic processes to coexist in close proximity, indicating different terminal electron acceptors may distribute spatially in the detrital microzone. The detrital microzone permits specific nutrient transformation processes which may not prosper or even be inhibited in the ambient waters. In response to the change in the detrital microzone nonequilibrium processes microbial communities regulate metabolism. The DHA increases at the change in terminal acceptors. The mechanism maintaining the stability of the detrital microzone is also discussed.

研究了海洋碎屑小生境形成、演化过程中营养盐特殊迁移过程和脱氢酶活性的变化。结果表明,在充氧水体中同时存在硝化和反硝化过程,并有高浓度No(?)富集。脱氢酶活性在实验第4天达到最高值,在第96天和192天出现波动。碎屑聚集体表面不但有微生物群落的演替,而且存在物理化学微环境的连续变化;当碎屑表面O_2被消耗而出现氧化还原电位梯度时,电子最终受体出现更替,非平衡过程发生改变,为适应这种改变,微生物群落重新调节新陈代谢,在分叉点附近,脱氢酶活性增大。

A classification of sediments must have the functions of both description and interpretation.A careful review is made by the authors of the classifications proposed by Shepard and Folk et al. The Shepard classification is no longer acceptable because of its lack of the function of interpretation. Folk's classification has advantages and is widely accepted by many countries in marine geological survey. However,there are conceptual problems to be solved.The compositional classification of sediments is ignored...

A classification of sediments must have the functions of both description and interpretation.A careful review is made by the authors of the classifications proposed by Shepard and Folk et al. The Shepard classification is no longer acceptable because of its lack of the function of interpretation. Folk's classification has advantages and is widely accepted by many countries in marine geological survey. However,there are conceptual problems to be solved.The compositional classification of sediments is ignored for long. With the implementation of the nation-wide marine survey in China,there is an urgent need in selection of a right classification system.It should be able to be used for sediment description as well as interpretation.It should be convenient in computer processing.It should be also transferable with other classification systems in use by other countries. A new classification system is proposed in this paper.It includes both the textural and compositional classifications.It is a multi-fold classification based upon the principle of two-end member classification even though a triangular diagram is used.According to the classification proposed,marine clastic sediments could be divided into four categories,i.e. sand,muddy sand, sandy mud and mud according to the ratio of sand and mud.They may be further divided into eleven categories as sand (S),silty muddy sand (ZMS),clayey muddy sand (CMS),clayey silty sandy mud (CZSM),silty clayey sandy mud (ZCSM),clayey sandy mud (CSM),silty sandy mud (ZSM),silt (Z),clayey silt (CZ),silty clay (ZC),and clay (C) in accordance with both the sand-mud ratio and silt-clay ratio. Gravel-bearing sediments could be divided according to the ratio of the gravel and the matrix. A compositional classification is proposed for the sandy sediments.With the ratios of quartz/(feldspar +lithic fragments)and feldspar/lithic fragments,sandy sediments could be divided into quartz sand (Q),feldspathic quartz sand (FQ),lithic quartz sand (LQ),quartz feldspathic sand (QF),quartz lithic sand (QL),feldspathic sand (F),lithic feldspathic sand (LF),feldspatic lithic sand (FL)and lithic sand (L).

比较研究了以 Shepard和 Folk等为代表的海洋碎屑沉积物分类方案 ,提出沉积物的分类应兼具描述与解释两种功能。Shepard分类已经过时 ,Folk等的分类方案有显著的优点 ,但亦有不足之处 ,应予以改进。沉积物的成分分类受到忽视的现象应予以改变。为适应我国海洋地质测量的需要 ,作者提出了一套结构分类与成分分类相匹配的多重分类系统 ,解决了海洋碎屑沉积物分类中的矛盾和问题

 
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