The June study by the US National Center for Atmospheric Research and the NSIDC is still more pessimistic. 美国国家大气研究中心(usnationalcenterforatmosphericresearch)和美国国家冰雪数据中心6月进行的一项研究则更为悲观。
CaCO 3 is an important component of mineral dust aerosols in the atmosphere, but its role in atmospheric heterogeneous chemistry is still unclear. 碳酸钙(CaCO3)是大气中矿物颗粒物的重要组分,其非均相大气化学行为很不清楚。
Lack of high space-and time-resolution and high quality data of atmospheric observations is still a big obstacle influencing the improvement of numerical weather prediction and further investigation in atmospheric sciences. 高时空精度大气观测资料的缺乏,仍是制约提高数值天气预报水平和深入开展大气科学研究的一个主要因素。
Atmospheric particle matters are still the major air pollution factor. 大气颗粒物仍然是全球大气污染的主要影响因子。
This technology can not merely protect the valid negative pole to the metal structure of exposing in the atmospheric environment, and still can carry on effective protection to the metal component that normal cathodic protection can not act on. 该技术不仅可对暴露在大气环境中的金属结构实行有效的阴极保护,而且还能对那些环境十分苛刻,正常阴极保护起不到作用的金属构件进行有效的保护。
Though scatterometer is designed to acquire measurements of sea-surface winds under all weather conditions, the atmospheric attenuation still has influence on the measured NRCS. 虽然微波散射计具有全天候工作特点,但是大气衰减对散射计测量的后向散射系数仍然有影响。
Many types of anthropogenic mercury sources emitted to the atmospheric environment have been widely investigated, however, large uncertainties are still unknown with respect to the potential of certain sources like landfill, especially with mercury species released from garbage disposal site. 大气的人为汞释放源研究已经较为广泛,但国内外对垃圾填埋场这一潜在的大气汞释放源还没有重视,尤其是垃圾填埋场释放汞的形态研究较为缺乏。
The impact of acid atmospheric deposition on the environment is still one of the focus problems in the present world. 大气酸性沉降物对土壤环境的影响,仍是当今世界环境问题的焦点之一。
The results show that even the minimal pointing vibration and atmospheric turbulence still can dramatically decrease the communication performance. 分析了卫星振动和大气湍流对星地光通信下行链路的联合影响,结果表明,即使很小的瞄准振动和大气湍流也会急剧降低通信性能。
The long period operation recovery system of waste heat in atmospheric still's heat pipe 加热炉热管烟气余热回收系统的长周期运行
It has been carried out extensively study on how to achieve homogeneous DBD at atmospheric pressure. However, it still lacks in depth research on how to evaluate discharge uniformity quantitatively, in particular, the method is still relatively cumbersome and expensive. 国内外对于如何实现大气压均匀DBD已经开展了广泛而深入的研究,但如何评价放电均匀性还缺乏定量的研究,特别是方法还比较繁琐和昂贵。
The direct experimental diagnosis on the atmospheric pressure plasma discharge is still limited at present. 当前大气压等离子体放电的实验诊断手段仍旧十分有限。
Hebei Province is an important dust deposition area from Central Asian north Pacific. The mechanism of the current atmospheric dust deposition in this region is still unclear. 河北省是中亚粉尘向北太平洋传输路径的重要沉降区域,目前对该区域大气粉尘的沉降机制尚不清楚。
Although there are some achievements on the removal of atmospheric effects and other research areas, D-InSAR is still restricted by some factors. 虽然随着D-InSAR技术的发展,在去除大气效应等领域取得了不少研究成果,但仍有一些因素制约了该技术的运用。
The technology of adaptive optics is one of the most effective methods of overcoming atmospheric turbulence. But it cannot completely compensate the atmospheric turbulence, and the high frequency information of objects is still restrained and attenuated. 自适应光学技术是目前克服大气湍流最有效的方法之一,但其对大气湍流的补偿是不完全的,目标的高频信息仍然受到抑制和衰减。
In this dissertation, the optical methods on atmospheric monitoring in the world are analyzed. Absorption spectrum analysis is still a key method, but it is a defect that long reliability of the cell is poor. 论文对国内外用于大气监测领域的光学监测方法的研究进行了深入分析和阐述,光谱吸收分析仍然是一种主要方法,存在的主要问题是监测装置的吸收池长期可靠性不高。