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Analysis on the Layout Evolution and External Space Characteristics of the Red Gate Palace in Taishan
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作者 Xue Wei 《Journal of World Architecture》 2021年第4期38-48,共11页
This article organizes and analyzes the historical evolution as well as the current situation of the Red Gate Palace,and probes into the artistic characteristics of the exterior space of the building.The conclusions a... This article organizes and analyzes the historical evolution as well as the current situation of the Red Gate Palace,and probes into the artistic characteristics of the exterior space of the building.The conclusions are as follows:Relying on the unique forest environment of Mount Tai,the Red Gate Palace forms an impression of negative yin-yang where it is overlooking waters and with hills at the back.The guiding space comprising of the climbing route,the archway,and the Feiyun Pavilion which is built on the crossroad plays the role of guidance and suggestion;forming a complete spatial sequence with rhythm.The courtyard space which constitutes the east and west courtyards,in addition to the Little Taishan Temple is reasonable and ingenious in layout along with rich as well as well-proportioned spaces,and pleasant in scale. 展开更多
关键词 Red Gate Palace in Taishan Guiding space Courtyard space space characteristic
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Configuration Selection for Reconfigurable Manufacturing Systems by Means of Characteristic State Space 被引量:2
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作者 HUANG Liang GAO Yuan +2 位作者 QIAN Feng TANG Suzhou WANG Delun 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2011年第1期23-32,共10页
The configuration selection for reconfigurable manufacturing systems(RMS) have been tackled in a number of studies by using analytical or simulation models. The simulation models are usually based on fewer assumptio... The configuration selection for reconfigurable manufacturing systems(RMS) have been tackled in a number of studies by using analytical or simulation models. The simulation models are usually based on fewer assumptions than the analytical models and therefore are more wildly used in modeling complex RMS. But in the absence of an efficient gradient analysis method of the objective function, it is time-consuming in solving large-scale problems by using a simulation model coupled with a meta-heuristics algorithm. In this paper, a new approach by means of characteristic state space is presented to improve the efficiency of the configuration selection for an RMS. First, a characteristic state equation is set up to represent the input and the output resources of each basic activity in an RMS. A production process model in terms of matrix equations is established by iterating the equations of basic activities according to the resource flows. This model introduces the production process into a characteristic state space for further analysis. Second, the properties of the characteristic state space are presented. On the basis of these properties, the configuration selection in an RMS is considered as a path-planning problem, and the gradient of the objective function is computed. Modified simulated annealing(SA) is also presented, in which neighborhood generation is guided by the gradient to accelerate convergence and reduce the run time of the optimization procedure. Finally, several case studies on the configuration selection for some actual reconfigurable assembly job-shops are presented and compared to the classical SA. The comparison shows relatively positive results. This study provides a more efficient configuration selection approach by using the gradient of the objective function and presents the relevant theories on which it is based. 展开更多
关键词 reconfigurable manufacturing system configuration selection characteristic state space simulated annealing
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A CHARACTERISTIC OF RIEMANNIAN SPACES ADMITTING QUASI-CONCIRCULAR TRANSFORMATION 被引量:2
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作者 李中林 《Acta Mathematica Scientia》 SCIE CSCD 1991年第1期56-64,共9页
In this paper, we have considered some properties of quasi-umbilical hypersurfaces of a Riemannian space and obtained a characteristic of Riemannian spaces admitting quasi-concircular transformation.
关键词 A characteristic OF RIEMANNIAN spaceS ADMITTING QUASI-CONCIRCULAR TRANSFORMATION
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REFERENCE FUNCTIONAL AND CHARACTERISTIC SPACE FOR LAGRANGE AND BERNSTEIN OPERATORS
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作者 S.De Marchi M.Morandi Cecchi 《Analysis in Theory and Applications》 1995年第4期6-14,共9页
This paper deals with the description and the representation of polynomials defined over n-simplices, The polynomials are computed by using two recurrent schemes: the Neville-Aitken one for the Lagrange interpolating ... This paper deals with the description and the representation of polynomials defined over n-simplices, The polynomials are computed by using two recurrent schemes: the Neville-Aitken one for the Lagrange interpolating operator and the De Casteljau one for the Bernstein-Bezier approximating operator. Both schemes fall intothe framework of transformations of the form where the F iare given numbers (forexample, at the initial step they coincide with the values of the function on a given lattice), and the coefficients (x) are linear polynomials valued in x and x is fixed. A general theory for such sequence of transformations can be found in [2] where it is also proved that these tranformations are completely characterized in term of a linear functional, reference functional. This functional is associated with a linear space., characteristic space.The concepts of reference functionals and characteristic spaces will be used and we shall prove the existence of a characteristic space for the reference functional: associated with these operators. 展开更多
关键词 REFERENCE FUNCTIONAL AND characteristic space FOR LAGRANGE AND BERNSTEIN OPERATORS
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Analysis on the Climate Characteristics of Thunderstorm in Fujian Province during 1960-2007 被引量:1
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作者 LIN Xiu-fang1,YOU Li-hang2,WEN Ming-zhang1 1.Fujian Climate Center,Fuzhou 350001,China 2.Meteorological Service Center in Fujian Province,Fuzhou 350001,China 《Meteorological and Environmental Research》 CAS 2011年第3期21-24,共4页
[Objective] The research aimed to study the activity characteristics and climate rule of thunderstorm in Fujian Province.[Method] Based on the daily thunderstorm data in 67 meteorological stations of Fujian Province d... [Objective] The research aimed to study the activity characteristics and climate rule of thunderstorm in Fujian Province.[Method] Based on the daily thunderstorm data in 67 meteorological stations of Fujian Province during 1960-2007,the spatial and temporal distribution characteristics of thunderstorm in Fujian Province were analyzed by using the climate tendency rate,the trend coefficient and so on.[Result] The distribution of thunderstorm days showed the northeast-southwest direction and increased gradually from the coast to the inland in Fujian Province during 1960-2007.The high value zone was in Longyan,and the thunderstorm days in the coastal islands were the fewest.The thunderstorm days had the obvious decrease trend in Fujian Province in 48 years.The decrease speeds in the central coastal area and most of inland mountain area were 3.5 and 4.5 d/10 a.The decrease speed was 5.5 d/10 a in the north of Ningde,the east of Sanming and some areas in Nanping.The trend coefficient variation of thunderstorm days had the obvious regional characteristic.Especially the decrease trend in the inland mountain area was more obvious than that in the coast.The decrease of thunderstorm day trend coefficient in the north of Nanping was the most,and the trend coefficient was-0.65.But the decrease trend in the central coastal area wasn’t obvious,and the coefficient was only-0.15.The thunderstorm day had the obvious seasonal variation.The multi-occurrence period of thunderstorm was during March-september and reached the maximum value in August.Started from September,the thunderstorm quickly decreased.From October to February in next year,the thunderstorm happened seldom.The average first thunderstorm date in the northwest area was earlier than that in the southeast area.The difference of average final thunderstorm date in the north and south areas wasn’t big.For the first thunderstorm date in the north and west of Fujian was early,and the final thunderstorm date was later,the thunderstorm activity time in the whole year was longer than that in the coast.They differed by nearly one month.[Conclusion] The research provided the scientific basis for the climate feasibility demonstration of major project items,provided the theory basis about the weather climate aspect for the thunder prevention and disaster reduction,and also laid the foundation for further studying the formation mechanism of thunderstorm in Fujian. 展开更多
关键词 THUNDERSTORM Time and space characteristics Trend coefficient Fujian Province China
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Rank-generating functions and Poincaré polynomials of lattices in finite orthogonal space of even characteristic
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作者 Feng XU Yanbing ZHAO Yuanji HUO 《Frontiers of Mathematics in China》 CSCD 2024年第4期181-189,共9页
The geometry of classical groups over finite fields is widely used in many fields.In this paper,we study the rank-generating function,the characteristic polynomial,and the Poincarépolynomial of lattices generated... The geometry of classical groups over finite fields is widely used in many fields.In this paper,we study the rank-generating function,the characteristic polynomial,and the Poincarépolynomial of lattices generated by the orbits of subspaces under finite orthogonal groups of even characteristic.We also determine their expressions. 展开更多
关键词 LATTICES orthogonal space of even characteristic rank-generating function characteristic polynomial Poincarépolynomial
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Information Space and Information Process: Genesis and Evolution
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作者 Tatiana Berestova 《Semiconductor Science and Information Devices》 2020年第1期6-16,共11页
In this article,the phenomenon of“information space”and its methods of study,its types,elementary structure and qualitative characteristics are discussed,the author’s definition of the concept of“information”is g... In this article,the phenomenon of“information space”and its methods of study,its types,elementary structure and qualitative characteristics are discussed,the author’s definition of the concept of“information”is given,the structure of the information process,and the phases,which are the basis for the evolution of the information space and the universe of human activity,are considered. 展开更多
关键词 Methods of studying INFORMATION Structure of information process Structure of information space characteristics of information space
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空间拦截器动力系统小推力高压燃烧室特性研究 被引量:3
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作者 陈新华 沈赤兵 《指挥技术学院学报》 1997年第1期13-20,共8页
介绍了空间拦截器服务系统性能参数预测数学模型,以及数学模型的求解方法。利用此数学模型对高室压和低室压情况下空间拦截器动力系统特性和小推力液体火箭燃烧室的性能进行了计算,简要分析评价了小推力高压燃烧室性能优缺点。
关键词 空间拦截器 动力系统 轨控发动机 燃烧室
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Classification of Hardy Submodules and Characteristic Space Theory(A Brief and Selective Survey)
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作者 KunYuGUO 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2003年第3期513-522,共10页
This paper is a brief and selective survey on classification of Hardy Submodules over the polydisk. The survey reports some progress in classification of Hardy submodules
关键词 CLASSIFICATION characteristic space theory Hardy submodules
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Distribution of Random Session Key Based on Key-Insulated Public-Key Cryptosystems
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作者 LUHai-jun SUYun-xue ZHUYue-fei 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第1期251-254,共4页
Based on the characteristic of key-insulated public-key cryptosystem, wepropose a distributed landora session keys distribution protocol without a key distribution center.The session key is generated by different user... Based on the characteristic of key-insulated public-key cryptosystem, wepropose a distributed landora session keys distribution protocol without a key distribution center.The session key is generated by different user and only used one time. So thekey is one-time key. Inaddition, the user who generates the next one-time key, is random selected by the current sessionkey. In the protocol of this paper, the characteristic of time in the key-insulated public-key, adistributed protocol, translates into the characteristic of spaee which every point has differentsecret key in the different period. At the same time, the system is fit for key management in AdHoe, and is a new scheme of key management in Ad Hoc. 展开更多
关键词 key-insulated public-key cryptosystem onetime key distributed cryptographyprotoeol distributed characteristic of space and time key management of Ad Hoc
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The Time-Frequency Energy Attenuation Factor and Its Application on the Basis of Gauss Linear Frequency-Modulated Continuous Wavelet Transform
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作者 LiuXiqiang ShenPing +4 位作者 LiHong ShanChanglun JiAidong ZhangPing CaiMingjun 《Earthquake Research in China》 2004年第1期42-53,共12页
Based on the Gauss linear frequency modulated wavelet transform, a new characteristic index is presented, namely time frequency energy attenuation factor which can reflect the difference features of waveform in earthq... Based on the Gauss linear frequency modulated wavelet transform, a new characteristic index is presented, namely time frequency energy attenuation factor which can reflect the difference features of waveform in earthquake focus mechanism, wave traveling path and its attenuation characteristics in focal area or near field. In order to test its validity, we select the natural earthquakes and explosion or collapse events whose focus mechanisms vary obviously,and some natural earthquakes located at the same site or in a very small area. The study indicates that the time frequency energy attenuation factors of the natural earthquakes are obviously different with that of explosion or collapse events, and the change of the time frequency energy attenuation factors is relatively stable for the earthquakes under the normal seismicity background. Using the above mentioned method, it is expected to offer a useful criterion for strong earthquake prediction by continuous earthquake observation. 展开更多
关键词 Continuous wavelet transform Time frequency energy attenuation factor The space difference characteristics The time change characteristics
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Core or edge? Revisiting GIScience from the geography-discipline perspective 被引量:7
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作者 Yu LIU 《Science China Earth Sciences》 SCIE EI CSCD 2022年第2期387-390,共4页
As an inter-disciplinary area between geography and computer sciences, geographical information science(GIScience) inherits the spatial analysis tradition of the former. Together with other branches of information geo... As an inter-disciplinary area between geography and computer sciences, geographical information science(GIScience) inherits the spatial analysis tradition of the former. Together with other branches of information geography, it seeks the balance between universality and particularity of geographical laws by combining methods from neighboring disciplines(such as big data and artificial intelligence) with the special nature of geographical spaces. Meanwhile, at the core position of the geography discipline, GIScience makes geography stronger from two directions: "strengthening the theoretical foundation" and "improving technology and promoting the practical applications". 展开更多
关键词 Geographical information science Information geography GEOGRAPHY characteristics of geographical spaces
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THE CODIMENSION FORMULA ON AF-COSUBMODULES 被引量:1
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作者 GUO KUNYU Department of Mathematics, Fudan University, Shanghai 200433, China 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2002年第3期419-424,共6页
Let M1, M2 be submodules of analytic Hilbert module X on ?(? Cn) such that M1 ? M2 and dimM1/M2 = k < '. If M2 is an AF-cosubmodule, then the codimension dimM1/M2 of M2 in M1 equals the cardinality of zeros of ... Let M1, M2 be submodules of analytic Hilbert module X on ?(? Cn) such that M1 ? M2 and dimM1/M2 = k < '. If M2 is an AF-cosubmodule, then the codimension dimM1/M2 of M2 in M1 equals the cardinality of zeros of M2 related to MI by counting multiplicities. The codimension formula has some interesting applications. In particular, the author calculates out the dimension of Rudin quotient module, which is raised in [14]. 展开更多
关键词 AF-cosubmodule characteristic space Analytic Hilbert module
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A Special MJO Event with a Double Kelvin Wave Structure
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作者 Lili ZHU Tim LI 《Journal of Meteorological Research》 SCIE CSCD 2017年第2期295-308,共14页
The second Madden–Julian Oscillation(MJO)event during the field campaign of the Dynamics of the MJO/Cooperative Indian Ocean Experiment on Intraseasonal Variability in the Year 2011(DYNAMO/CINDY2011)exhibi ted an... The second Madden–Julian Oscillation(MJO)event during the field campaign of the Dynamics of the MJO/Cooperative Indian Ocean Experiment on Intraseasonal Variability in the Year 2011(DYNAMO/CINDY2011)exhibi ted an unusual double rainband structure.Using a wavenumber-frequency spectral filtering method,we unveil that this double rainband structure arises primarily from the Kelvin wave component.The zonal phase speed of the double rainbands is about 7.9 degree per day in the equatorial Indian Ocean,being in the range of convectively coupled Kelvin wave phase speeds.The convection and circulation anomalies associated with the Kelvin wave component are characterized by two anomalous convective cells,with low-level westerly(easterly)and high(low)pressure anomalies to the west(east)of the convective centers,and opposite wind and pressure anomalies in the upper troposphere.Such a zonal wind–pressure phase relationship is consistent with the equatorial free-wave dynamics.While the freeatmospheric circulation was dominated by the first baroclinic mode vertical structure,moisture and vertical motion in the boundary layer led the convection.The convection and circulation structures derived based on the conventional MJO filter show a different characteristic.For example,the phase speed is slower(about 5.9 degree per day),and there were no double convective branches.This suggests that MJO generally involves multi-scales and it is incomplete to extract its signals by using the conventional filtering technique. 展开更多
关键词 Madden–Julian Oscillation(MJO) double Kelvin wave structure Wheeler–Kiladis space–time spectra evolution characteristics
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