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Based on integrative data of systematics, fossil history, and morphological and molecular evidence of these genera, their origin, evolution and relationships were discussed.
      
Through research on characteristics such as shape, modality and structure of these fossils symbiotic with Punctatus emeiensis, the author found many possible embryo fossils including the evidence of gastrula-stage animal fossils.
      
Evidence of the transgression lake of the Subei basin during Late Cretaceous and Paleocene and its geological significance
      
The evidence of paleontology, minerals in rocks and geochemistry can help confirm the environment of the lake basin that developed during the Late Cretaceous and Paleocene.
      
The defects at anaphase 1 and anaphase 2 did not affect the karyotype constancy and their absence at the tetrad stage can be considered as an evidence of cytological stability of the studied material.
      
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Three sources of distinct and typical observational data of QSOs are used in this paper, namely: (1) the revised optical catalog of QSOs, (2) the QSOs in the -40° zone of CTIO Curtis Schmidt Survey, (3) the QSOs in the Virgo cluster region. The distribution of redshift and magnitude cf QSOs on both large and small scales, and possible association of QSOs with field galaxies and brighter cluster galaxies are analysed statistically.The preliminary conclusions are as follows: (1) Generally speaking, the distribution...

Three sources of distinct and typical observational data of QSOs are used in this paper, namely: (1) the revised optical catalog of QSOs, (2) the QSOs in the -40° zone of CTIO Curtis Schmidt Survey, (3) the QSOs in the Virgo cluster region. The distribution of redshift and magnitude cf QSOs on both large and small scales, and possible association of QSOs with field galaxies and brighter cluster galaxies are analysed statistically.The preliminary conclusions are as follows: (1) Generally speaking, the distribution of redshift and magnitude of QSOs on different scales is considerably non-uniform. (2) In the case of the local region the non-uniformity appears to be more significant. (3) There is no evidence of general association of QSOs with field galaxies. (4) The possibility of general association of QSOs with brighter cluster galaxies is statistically significant. (5) It seems likely that not all QSOs ha.ve the same origin, some being local and some cosmological.

本文采用了三组具有代表性的类星体观测资料:(1)类星体第二总表,(2)赤纬-40°天区类星体,(3)室女座星系团区类星体。分析的内容包括:类星体红移和星等的大尺度分布,类星体在局部天区内的空间分布,类星体与场星系以及与星系团中亮星系的成协性。 得到的初步结果是:(1)类星体就整体来说其红移和星等在各种尺度上的分布是不均匀的;(2)在局部天区内这种不均匀性表现得更为显著;(3)类星体与场星系的普遍成协性不明显;(4)类星体与星系团中亮星系普遍成协的可能性是统计显著的;(5)类星体在演化上应该具有不同的起源。就其本质来说很可能是宇宙论性和非宇宙论性两者兼之。

The Marple algorithm of AR spectrum is applied calculation of annual average values of the day length from 1800 to 1984 in order to find decades fluctuation of 1. o. d., and 8 periodic componeots are confirmed. The fitted series of 1. o. d. with these periodic components is in good accordance with the observed ones. The fitting standard error is about 0.15ms for data of 1800-1935 years, and about 0.32ms for 1800-1984 years. The amplitudes and phases of these components are various with diffeient data spans....

The Marple algorithm of AR spectrum is applied calculation of annual average values of the day length from 1800 to 1984 in order to find decades fluctuation of 1. o. d., and 8 periodic componeots are confirmed. The fitted series of 1. o. d. with these periodic components is in good accordance with the observed ones. The fitting standard error is about 0.15ms for data of 1800-1935 years, and about 0.32ms for 1800-1984 years. The amplitudes and phases of these components are various with diffeient data spans. Therefore they belong to the irregular variation of the Earth's rotation. According to dynamo theory and the observational evidence of westward drift of geomagnetic field, it appears that the electromagnetic core-mantle coupling might be regarded as a plausible mechanism of the decades fluctuation of 1. o. d.

本文用AR谱的Marple算法分析了1800—1984年日长年均值资料,寻找十年至几十年范围变化的周期,最后确定为8个周期。用最小二乘拟合曲线和地球自转观测值相比较,其均方差为o=±0.32ms。用不同的记录长度资料分析所得结果,这些周期的振幅位相是有差异的。它们属于地球自转不规则变化。根据Elsasser,Bullard等人所考虑的地核存在自激发电机理论及地磁场西移的观测证据,本文认为十年尺度波动最可能的机制是电磁核一慢耦合。

Small-scale magnetic fields on the solar surface, a term applied to all magnetic features and structures outside active regions, are usually much smaller in area than a supergranule. Currently they are divided into three categories: network magnetic fields, intranetwork magnetic fields and ephemeral active regions(or ephemeral regions) .They are the majority of solar magnetic flux at any phase of solar cycle. Their appearance, disappearance and evolution may play an important role in heating the upper atmosphere.The...

Small-scale magnetic fields on the solar surface, a term applied to all magnetic features and structures outside active regions, are usually much smaller in area than a supergranule. Currently they are divided into three categories: network magnetic fields, intranetwork magnetic fields and ephemeral active regions(or ephemeral regions) .They are the majority of solar magnetic flux at any phase of solar cycle. Their appearance, disappearance and evolution may play an important role in heating the upper atmosphere.The emergence of ephemeral regions is one of the main sources of small-scale flux. Ephemeral regions become the small-scale end of the active region spectrum. The studies of the generation and evolution of intranetwork magnetic fields, which are still in their early stage, are a very active and heavily competitive area. Preliminary work shows that the total flux emerging in the form of intranetwork fields exceeds that emerging in ephemeral regions by two oders of magnitute. The flux cancellation which has been extensively illustrated and described might provide the first observational evidence of magnetic reconnec-tion.Flux cancellation is proved to be the most common mode of flux disappearance away from the solar surface. The indirect evidence of the correlation between cancelling magnetic features and coronal X-ray bright points has been found by Harvey.The observations of flux emergence,cancellation,coalescence and fragmentation cause us to view the network magnetic fields in a new way that the network fields are not only the products of the remnant fields of decaying active regions, but also the products of the remnant flux of ephemeral regions and intranetwork fields.

太阳表面小尺度磁场,是指太阳活动区之外的小尺度磁结构。它们目前被区分为网络磁场、网络内磁场和瞬现活动区(或瞬现区)三类。小尺度磁场遍及太阳表面,在太阳活动的任何位相都组成太阳表面磁通量的主要部分,其生消变化可能对上层大气的加热有重要影响。 瞬现区的浮现是小尺度磁通量产生的重要方式。瞬现区组成了太阳活动区在小尺民一端的谱的延伸。网络内磁场的产生和演化的研究,仍处于刚刚开始的阶段,是一个十分活跃的研究领域。初步研究表明,网络内包含的总磁通量比瞬现区的总和多两个量级。最近被广泛证认和研究的磁场对消现象,可能首次提供了磁力线重联的观测证据,被证明是磁通量从太阳表面消失的主要观测模式。对消磁结构与日冕X-射线亮点相关的间接证据已为Harvey给出。由于浮现、对消、分裂和聚合等各种动力学过程的存在,网络磁场不再被认为仅仅是衰减活动区的残余。

 
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