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Search Results: 1 - 10 of 37620 matches for " Manyun Lin "
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Precise Forecast and Application of Time Delay Receiving Schedule for a New Generation of Polar Orbit Meteorological Satellite  [PDF]
Zhaohui Cheng, Manyun Lin, Cunqun Fan
Journal of Geographic Information System (JGIS) , 2018, DOI: 10.4236/jgis.2018.101006
Abstract: In order to finely predict the receiving schedule of the new generation of polar orbit meteorological satellite time-delay data and solve the problem of rapid positioning of lost data, this paper studies and proposes the satellite data recording and satellite program-controlled program, and designs the delay data receiving timeline precision forecasting method. It is concluded that the detection load of polar orbit meteorological satellite in our country has developed from single load to multiple loads, and the detection data need to be downloaded to the ground for processing and application. And as the satellite load increases and the accuracy of each payload detection and channel increases, the amount of probing data will further increase, which in turn will require further increase of the speed of data transmission in the earth. Due to the limitation of the space data transmission frequency band, under the prior art system, the increase of the satellite data transmission rate is limited. On the basis of understanding the working principle of Fengyun-3, the new transmission system will be implemented in terms of data source compression, channel coding, modulation and polarization multiplexing by exploring new weather transmission systems for meteorological satellites in the future upgrade and at the same time analyze ways to avoid inter-satellite interference in order to solve the contradiction between the increase of data volume and the resource of terrestrial data transmission in the existing system.
Research on Exception of Meteorological Satellite Ground System Application Based on Resource Bottleneck  [PDF]
Xiangang Zhao, Manyun Lin, Weixia Lin, Lizi Xie, Cunqun Fan
Atmospheric and Climate Sciences (ACS) , 2017, DOI: 10.4236/acs.2017.73027
Abstract: Meteorological satellite ground application system resources are limited. Abnormal satellite missions often lead to hopple of system resources. In order to analyze the problem, this paper presents an anomaly analysis method for meteorological satellite ground system based on resource bottleneck. Through the CPU, memory and I/O, several types of resources in-depth were analyzed to find the bottleneck caused by the problem, thus providing recommendations for application optimization. Experimental analysis shows that the proposed method can reasonably analyze the resource bottleneck of CPU, memory and I/O, and draw a good conclusion. To solve the meteorological satellite application system application anomaly caused by the bottleneck of the problem, the application of optimization to a certain extent plays a positive role.
A Parallelization Research for FY Satellite Rainfall Estimate Day Knock off Product Algorithm  [PDF]
Weixia Lin, Xiangang Zhao, Cunqun Fan, Manyun Lin, Lizi Xie
Atmospheric and Climate Sciences (ACS) , 2018, DOI: 10.4236/acs.2018.82016
Abstract: With the development of satellite remote sensing technology, more and more requirements are put forward on the timeliness and stability of the satellite weather service system. The FY satellite rainfall estimate day knock off product algorithm runs longer, about 20 minutes, which affects the estimated rainfall product generated timeliness. Research and development of parallel optimization algorithms based on the needs of satellite meteorological services and their effectiveness in practical applications are necessary ways to enhance the high-performance and high-availability capabilities of satellite meteorological services. So aiming at this problem, we started the parallel algorithm research based on the analysis of precipitation estimation algorithm. Firstly, we explained the steps of precipitation estimated date knock off product algorithm; secondly, we analyzed the four main calculation module calculating the amount of algorithms; thirdly, multithreaded parallel algorithm and MPI parallelization was designed. Finally, the multithreaded parallel and MPI parallelization were realized. Experimental results show that the multithreaded parallel and MPI parallelization algorithm could greatly improve the overall degree of computational efficiency. And, MPI parallelization mode has a higher operating efficiency. The performance of parallel processing is closely related to the architecture of the computer. From the perspective of service scheduling and product algorithms, the MPI parallelization approach is adopted to achieve the purpose of improving service quality.
Classification of Meteorological Satellite Ground System Applications  [PDF]
Manyun Lin, Xiangang Zhao, Xieli Zi, Peng Guo, Cunqun Fan
Atmospheric and Climate Sciences (ACS) , 2017, DOI: 10.4236/acs.2017.73028
Abstract: Meteorological satellite ground application system carries a large number of applications. These applications deal with a variety of tasks. In order to classify these applications according to the resource consumption and improve the rational allocation of system resources, this paper introduces several application analysis algorithms. Firstly, the requirements are abstractly described, and then analyzed by hierarchical clustering algorithm. Finally, the benchmark analysis of resource consumption is given. Through the benchmark analysis of resource consumption, we will give a more accurate meteorological satellite ground application system.
Study on Massive Vegetation Data Processing of FY-3 Based on RAM (h)  [PDF]
Manyun Lin, Xiangang Zhao, Cunqun Fan, Lizi Xie, Lan Wei
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.54007
Abstract: The vegetation data of the Fengyun meteorological satellite are segmented according to the latitude and longitude, and can be written into 648 blocks. However, the vegetation data processing efficiency is low because the data belongs to massive data. This paper presents a data processing method based on RAM (h) for Fengyun-3 vegetation data. First of all, we introduce the Locality-Aware model to segment the input data, then locate the data based on geographic location, and finally fuse the independent data based on geographical location. Experimental results show that the proposed method can effectively improve the data processing efficiency.
Polarimetric Meteorological Satellite Data Processing Software Classification Based on Principal Component Analysis and Improved K-Means Algorithm  [PDF]
Manyun Lin, Xiangang Zhao, Cunqun Fan, Lizi Xie, Lan Wei, Peng Guo
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.57005
Abstract: With the increasing variety of application software of meteorological satellite ground system, how to provide reasonable hardware resources and improve the efficiency of software is paid more and more attention. In this paper, a set of software classification method based on software operating characteristics is proposed. The method uses software run-time resource consumption to describe the software running characteristics. Firstly, principal component analysis (PCA) is used to reduce the dimension of software running feature data and to interpret software characteristic information. Then the modified K-means algorithm was used to classify the meteorological data processing software. Finally, it combined with the results of principal component analysis to explain the significance of various types of integrated software operating characteristics. And it is used as the basis for optimizing the allocation of software hardware resources and improving the efficiency of software operation.
The Evolution of Granulite Facies Metamorphism in Eastern Hebei Province

Chen Manyun,Li Shuxun,

岩石学报 , 1996,
Abstract: 据冀东迁安-遵化一带麻粒岩相区的变质岩石、变质矿物及其组构特征、变质作用的温度、压力条件,结合同位素年代学资料,以及岩浆作用、构造变形作用和变质作用之间的关系,可将本区太古代变质作用划分为两期。太古代第一期变质作用只限于表壳岩包体岩石中,变质级为高角闪岩相和辉石麻粒岩相,第二期变质作用发生在晚太古代,早期变质阶段是在紫苏花岗岩侵位以后发生的辉石麻粒岩相变质作用,晚期变质阶段发生在稍后侵位的基性侵入岩体、英云闪长岩、奥长花岗岩等深成侵入体中,变质级达角闪麻粒岩相。早元古代第一期角闪石榴二辉麻粒岩型岩脉,遭受了辉石麻粒相变质作用,第二期角闪石榴斜长辉石岩型岩脉经历了角闪麻粒岩相变质作用。这些变质作用在早期岩石中都有不同程度的叠加。麻粒岩相变质作用的温度在700℃~920℃,压力在0.88~1.14GPa。变质作用的PTt演化呈现了逆时针近等压冷却的轨迹
Types of main metamorphic rocks by the composition fabric and genesis of metamorphic rocks

CHEN ManYun,JIN Wei,ZHENG ChangQing,

岩石学报 , 2009,
Abstract: The three essential factors for classifying metamorphic rocks are composition (chemical and mineralogical), fabric (texture and structure) and genesis (types of metamorphism and physiochemical conditions for forming metamorphic rocks). So far, there is still not a perfect classification scheme based on the three essential factors due to the chemical, mineralogical and fabric characteristics, and the complex geological environments of metamorphic rocks. The classification scheme used in this paper is based on the three essential factors. For the first time, we put metamorphic rocks with different geneses into one classification scheme. We have also listed the main index mineral compositions and fabric characteristics into one classification scheme to indentify metamorphic rocks. Compared to previous schemes, this classification scheme is more useful and practicable, which has covered the main metamorphic rocks in nature.
Phase Identification Using Series of Selected Area Diffraction Patterns and Energy Dispersive Spectrometry within TEM  [PDF]
Kun-Lin Lin
Microscopy Research (MR) , 2014, DOI: 10.4236/mr.2014.24008
Abstract: Transmission electron microscopy (TEM) is a very powerful technique for materials characteriza-tion, providing information relating to morphology, composition, and crystal structure. Selected area diffraction patterns (SADPs) are crystallographic data that can be obtained using a TEM in-strument. Conventional identification through SADP/TEM is tricky and tedious, thereby increasing the difficulty of phase identification. To establish a procedure for phase identification of known and unknown phases, in this study we examined two samples: one, a known phase, was Si with <100> alignment; the other, unknown, was the TixOy phase at the 96.4Au-3Ni-0.6Ti interlayer/ yttria-stabilized zirconia (YSZ) interface of a steel/96.4Au-3Ni-0.6Ti interlayer/YSZ joint. The procedures for phase identification of the known and unknown phases are described herein using a series of SADPs and energy dispersive spectrometry within TEM that would be useful for general researchers.
Influence of Dams on River Ecosystem and Its Countermeasures  [PDF]
Qicai Lin
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.31007
Abstract: Dam construction is an important engineering measure in dealing with the relationship between water and human being. However, with dam construction, some disadvantages to the river basin may be caused, including flow flux of downstream changed, flooded area reduced, river species and other organisms changed and substance sedimentation. Furthermore, it brings some diseases to human being and human residential areas reduced too. Based on the basic principles of ecohydralic engineering, some countermeasures to minimize the negative effects on rivers were put forward. They are reservoir ecological regulation, ecohydraulic engineering construction and comprehensive water pollution treatment.
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