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深圳会展旅游:向"四化"进军 被引量:2
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作者 胡卫华 《中国会展》 2005年第1期110-112,共3页
深圳的的会展服务满意度排在上海和天津之后,名到全国第三,展览会的规模及数量列全国第四。深圳会展旅游正处于发展的大好时机。
关键词 会展旅游 服务满意度 深圳 展览会 数量列 好时机 四化 天津 会展业 上海
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Oil–water two-phase flow pattern analysis with ERT based measurement and multivariate maximum Lyapunov exponent 被引量:8
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作者 谭超 王娜娜 董峰 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第1期240-248,共9页
Oil–water two-phase flow patterns in a horizontal pipe are analyzed with a 16-electrode electrical resistance tomography(ERT) system. The measurement data of the ERT are treated as a multivariate time-series, thus th... Oil–water two-phase flow patterns in a horizontal pipe are analyzed with a 16-electrode electrical resistance tomography(ERT) system. The measurement data of the ERT are treated as a multivariate time-series, thus the information extracted from each electrode represents the local phase distribution and fraction change at that location. The multivariate maximum Lyapunov exponent(MMLE) is extracted from the 16-dimension time-series to demonstrate the change of flow pattern versus the superficial velocity ratio of oil to water. The correlation dimension of the multivariate time-series is further introduced to jointly characterize and finally separate the flow patterns with MMLE. The change of flow patterns with superficial oil velocity at different water superficial velocities is studied with MMLE and correlation dimension, respectively, and the flow pattern transition can also be characterized with these two features. The proposed MMLE and correlation dimension map could effectively separate the flow patterns, thus is an effective tool for flow pattern identification and transition analysis. 展开更多
关键词 oil-water two-phase flow flow patterns electrical resistance tomography (ERT) multivariate time-series multivariate maximum Lyapunov exponent correlation dimension
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Wronskian and Grammian Determinant Solutions for a Variable-Coefficient Kadomtsev-Petviashvili Equation 被引量:2
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作者 YAO Zhen-Zhi ZHANG Chun-Yi +4 位作者 ZHU Hong-Wu MENG Xiang-Hua LU Xing SHAN Wen-Rui TIAN Bo 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第5期1125-1128,共4页
In this paper, we derive the bilinear form for a variable-coefficient Kadomtsev Petviashvili-typed equation. Based on the bilinear form, we obtain the Wronskian determinant solution, which is proved to be indeed an ex... In this paper, we derive the bilinear form for a variable-coefficient Kadomtsev Petviashvili-typed equation. Based on the bilinear form, we obtain the Wronskian determinant solution, which is proved to be indeed an exact solution of this equation through the Wronskian technique. In addition, we testify that this equation can be reduced to a Jacobi identity by considering its solution as a Grammian determinant by means of Pfaffian derivative formulae. 展开更多
关键词 variable-coefficient Kadomtsev-Petviashvili equation Wronskian determinant Grammian deter-minant PFAFFIAN Jacobi identity
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Pattern recognition and prediction study of rock burst based on neural network 被引量:2
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作者 LI Hong 《Journal of Coal Science & Engineering(China)》 2010年第4期347-351,共5页
Many monitoring measures were used in the production field for predicting rockburst.However, predicting rock burst according to complicated observation data is alwaysa pressing problem in this research field.Though th... Many monitoring measures were used in the production field for predicting rockburst.However, predicting rock burst according to complicated observation data is alwaysa pressing problem in this research field.Though the critical value method gets extensiveapplication in practice, it stresses only on the superficial change of data and overlooks alot of features of rock burst and useful information that is concealed and hidden in the observationtime series.Pattern recognition extracts the feature value of time domain, frequencydomain and wavelet domain in observation time series to form Multi-Feature vectors,using Euclidean distance measure as the separable criterion between the same typeand different type to compress and transform feature vectors.It applies neural network asa tool to recognize the danger of rock burst, and uses feature vectors being compressedto carry out training and studying.It is proved by test samples that predicting precisionshould be prior to such traditional predicting methods as pattern recognition and critical indicatormethod. 展开更多
关键词 rock burst multi-feature pattern recognition neural network
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Regularity of Solution for a Class Zakharov-Kuznestov Equation
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作者 MAYun-xin GUOTian-fen 《Chinese Quarterly Journal of Mathematics》 CSCD 2004年第2期192-197,共6页
In this paper, we consider the regularity of solution in S for Zakharov-Kuznestov equation in H^s(s>2). Meanwhile, by method of undetermined coefficient we prove that there don't exist and conservative integral... In this paper, we consider the regularity of solution in S for Zakharov-Kuznestov equation in H^s(s>2). Meanwhile, by method of undetermined coefficient we prove that there don't exist and conservative integral include 2 order of higher order derived functions. 展开更多
关键词 Z-K equation Cauchy problem conservative quantity Plainleve property
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Calculation of Significant Wave Height Using the Linear Mean Square Estimation Method 被引量:2
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作者 GAO Yangyang YU Dingyong +1 位作者 LI Cuilin XU Delun 《Journal of Ocean University of China》 SCIE CAS 2010年第4期327-332,共6页
Significant wave height is an important criterion in designing coastal and offshore structures.Based on the orthogonality principle, the linear mean square estimation method is applied to calculate significant wave he... Significant wave height is an important criterion in designing coastal and offshore structures.Based on the orthogonality principle, the linear mean square estimation method is applied to calculate significant wave height in this paper.Twenty-eight-year time series of wave data collected from three ocean buoys near San Francisco along the California coast are analyzed.It is proved theoretically that the computation error will be reduced by using as many measured data as possible for the calculation of significant wave height.Measured significant wave height at one buoy location is compared with the calculated value based on the data from two other adjacent buoys.The results indicate that the linear mean square estimation method can be well applied to the calculation and prediction of significant wave height in coastal regions. 展开更多
关键词 significant wave height linear mean square estimation method orthogonality principle
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Some Coordinate Polynomials in Three Variables
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作者 GONG Sheng-jun LI Shang-zhi 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第4期482-487,共6页
In this paper, we introduce a polynomial sequence in K[x], in which two neighbor polynomials satisfy a wonderful property. Using that,we give partial answer of an open problem: ifφ(x, y, z) = (f(x, y), g(x, y... In this paper, we introduce a polynomial sequence in K[x], in which two neighbor polynomials satisfy a wonderful property. Using that,we give partial answer of an open problem: ifφ(x, y, z) = (f(x, y), g(x, y, z), z), which sends every linear coordinate to a coordinate, then φ is an automorphism of K[x, y, z]. As a byproduct, we give an easy proof of the well-known Jung's Theorem. 展开更多
关键词 coordinate polynomials Jacobian Conjecture polynomial automorphism tameautomorphism algebraically closed field
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Two Kinds of Series Involving the Reciprocals of Binomial Coefficients
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作者 SONG Hai-tao 《Chinese Quarterly Journal of Mathematics》 CSCD 2011年第2期306-310,共5页
By applying the theory of formal power series,the author obtains the closed forms for two kinds of infinite series involving the reciprocals of binomial coefficients,and the author gets another closed form for the inf... By applying the theory of formal power series,the author obtains the closed forms for two kinds of infinite series involving the reciprocals of binomial coefficients,and the author gets another closed form for the infinite series Σr≥m tn+r/(n+rr). 展开更多
关键词 reciprocals of binomial coefficients formal power series combinatorial identity
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Using Array Methods to Identify and Process Weak Signals Generated by the Brightlight(Ⅰ) 50t Explosion 被引量:1
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作者 Hao Chunyue Zheng Zhong Zhang Shuang 《Earthquake Research in China》 2010年第2期190-197,共8页
Waveforms generated by the 50t explosion of project Brightlight ( I ) were recorded by HILR array. Using array techniques, the author performed identification, f-k analysis, velocity spectrum analysis, etc. of the w... Waveforms generated by the 50t explosion of project Brightlight ( I ) were recorded by HILR array. Using array techniques, the author performed identification, f-k analysis, velocity spectrum analysis, etc. of the weak signals. The analysis results show that the signal-to-noise ratio after beamforming was obviously enhanced, and the signal could be clearly shown. The energy from this explosion was mainly concentrated in the 1 -8Hz range from f-k analysis. The velocity spectrum gave clear positions of event phases, which could not be seen in the original weak signals. The maximum energy distribution obtained by the Beaman method is close to the theoretical value in the azimuth-slowness domain. 展开更多
关键词 Brightlight( I explosion HILR seismic array Identification of weak signals Array techniques
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Numerical simulation research on multi-electrodes resistivity imaging survey array
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作者 Jianjun NIU Xiaopei ZHANG Lizhi DU 《Global Geology》 2008年第4期232-236,共5页
Multi-electrodes Resistivity Imaging Survey(MRIS)is an array method of electrical survey.In practice how to choose a reasonable array is the key to get reliable survey results.Based on four methods of MRIS such as Wen... Multi-electrodes Resistivity Imaging Survey(MRIS)is an array method of electrical survey.In practice how to choose a reasonable array is the key to get reliable survey results.Based on four methods of MRIS such as Wenner,Schlumberger,Pole-pole and Dipole-dipole the authors established the model,by studying the result of the forward numerical simulation modeling and inverse modeling,and analyzed the differences among the different forms of detection devices. 展开更多
关键词 multi-electrodes resistivity imaging surveys forward model ARRAY
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On the Second Borel-Cantelli Lemma for α-mixing Sequences of Events
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作者 YUAN De-mei 《Chinese Quarterly Journal of Mathematics》 CSCD 2009年第4期551-560,共10页
In this paper, we give some conditions on diverging rate of series of the probabilities and converging rate of series of the α-mixing coefficients for sequences of events, under which the conclusion of the Second Bor... In this paper, we give some conditions on diverging rate of series of the probabilities and converging rate of series of the α-mixing coefficients for sequences of events, under which the conclusion of the Second Borel-Cantelli Lemma holds. As corollaries, some moment conditions are obtained, under which the strong law of large numbers holds for sequences of identically distributed random variables. 展开更多
关键词 Borel-Cantelli lemma strong mixing Α-MIXING strong law of large numbers
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Comparative Analysis of China Surface Air Temperature Series for the Past 100 Years 被引量:1
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作者 Guoli Tang Yihui Ding +3 位作者 Shaowu Wang Guoyu Ren Hongbin Liu Li Zhang 《Advances in Climate Change Research》 SCIE 2010年第1期11-19,共9页
Temperature change plays a crucial role in global change sciences. In the past several decades, comprehensive find- ings have been achieved on temperature change in China for the past 100 years. Several time series ha... Temperature change plays a crucial role in global change sciences. In the past several decades, comprehensive find- ings have been achieved on temperature change in China for the past 100 years. Several time series have been created to illustrate the averaged surface air temperature for the country. The correlations of these series range from 0.73 to 0.97. It is also achieved in better data quality, wider spatial data coverage, improved homogeneity of time series, and enhanced reliability of findings. The results show an annual mean temperature increase by 0.78±0.27℃ per 100 years in China for the period 1906-2005. After prolonging the period till 2007, it is found that 2007 is rated as the warmest year in the past 100 years. Although all the series, except one, reflect temperature changes in the eastern part of China before the 1930s, they represent the general temperature change in most parts of the country after the 1930s. 展开更多
关键词 past 100 years air temperature series warming rate estimate global warming
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Is China’s Economic Growth Profitled or Wage-led?——A Theoretical Inquiry and Empirical Study on the Impact of Labor Share on Growth
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作者 刘盾 施祖麟 林玳玳 《China Economist》 2015年第3期83-99,共17页
The paper makes a comparative review and evaluation of different theories on impacts of the distribution of labor and capital income on economic growth as well as criticism of the mainstream theories and suggests usin... The paper makes a comparative review and evaluation of different theories on impacts of the distribution of labor and capital income on economic growth as well as criticism of the mainstream theories and suggests using Bhaduri-Marglin model as the theoretical basis for relevant research. By formulating the econometric model and analyzing time series data from 1978 to 2012, the paper makes an empirical research into the impact of labor share on economic growth in China. It has discovered that the positive effect of labor share on consumption demand growth in China outweighs its negative effect on investment and net export growth, concluding that growth in China is wage-led at present. That may mean that (1) increasing labor share promotes growth and the goals of equality and efficiency supports each other," (2) the demand and optimizing structure" lies in regulation tools. key to "stabilizing growth, expanding domestic establishing a set of pro-labor institution and 展开更多
关键词 labor share labor-capital distribution factors income distribution economicgrowth wage-led growth effective demand
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1996年高考物理试题分析和山西省考试情况
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作者 王泉根 陈海鸿 贾元铎 《物理教师》 1996年第12期34-35,共2页
1996年是高考改革第三年,与前两年相比,1996年的试题变化较大。主要是试题的数量减少,难度有所增加。这三年中试题的题型数量列表如下。
关键词 高考物理试题 考试情况 1996年 得分率 实验题 牛顿运动定律 机械能守恒 打点计时器 数量列 动能定理
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General divisor functions in arithmetic progressions to large moduli 被引量:1
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作者 WEI Fei XUE BoQing ZHANG YiTang 《Science China Mathematics》 SCIE CSCD 2016年第9期1663-1668,共6页
We prove a result on the distribution of the general divisor functions in arithmetic progressions to smooth moduli which exceed the square root of the length.
关键词 divisor function arithmetic progression to large moduli mean-value estimate
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WHEN CAN THE STABLE ALGEBRA DETERMINE THE STRUCTURE OF A C-ALGEBRA ?
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作者 WU LIANGSEN (Institute of Mathematics, East Normal University, Shanghai 200062. China) 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1994年第2期153-156,共4页
Let A and B be C-algebras. Suppose that K is the algebra of all compact operators on a seperable Hilbert space, and α is an action on the stable algebra K A induced by SU(∞).It is proved that if A is α-invariant s... Let A and B be C-algebras. Suppose that K is the algebra of all compact operators on a seperable Hilbert space, and α is an action on the stable algebra K A induced by SU(∞).It is proved that if A is α-invariant stable isomorphic to B, then there is a-isomorphism between A and B. An analogous result is obtained by considering On K A in the place of K A, where On is the Cuntz algebra (3≤ n < ∞). 展开更多
关键词 C-ALGEBRA Stable algebra Cuntz algebra α-invariance.
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Implicit Sampling,with Application to Data Assimilation
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作者 Alexandre J.CHORIN Matthias MORZFELD Xuemin TU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2013年第1期89-98,共10页
There are many computational tasks, in which it is necessary to sample a given probability density function (or pdf for short), i.e., to use a computer to construct a sequence of independent random vectors x~ (i --... There are many computational tasks, in which it is necessary to sample a given probability density function (or pdf for short), i.e., to use a computer to construct a sequence of independent random vectors x~ (i ---- 1, 2, ~ ~ ~ ), whose histogram converges to the given pdf. This can be difficult because the sample space can be huge, and more importantly, because the portion of the space, where the density is significant, can be very small, so that one may miss it by an ill-designed sampling scheme. Indeed, Markov- chain Monte Carlo, the most widely used sampling scheme, can be thought of as a search algorithm, where one starts at an arbitrary point and one advances step-by-step towards the high probability region of the space. This can be expensive, in particular because one is typically interested in independent samples, while the chain has a memory. The authors present an alternative, in which samples are found by solving an algebraic equation with a random right-hand side rather than by following a chain; each sample is independent of the previous samples. The construction in the context of numerical integration is explained, and then it is applied to data assimilation. 展开更多
关键词 Importance sampling Bayesian estimation Particle filter Implicit filter Data assimilation
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Tensor products of complementary series of rank one Lie groups
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作者 ZHANG GenKai 《Science China Mathematics》 SCIE CSCD 2017年第11期2337-2348,共12页
We consider the tensor product π_α ? π_βof complementary series representations π_α and π_β of classical rank one groups SO_0(n, 1), SU(n, 1) and Sp(n, 1). We prove that there is a discrete component π_(α+β... We consider the tensor product π_α ? π_βof complementary series representations π_α and π_β of classical rank one groups SO_0(n, 1), SU(n, 1) and Sp(n, 1). We prove that there is a discrete component π_(α+β)for small parameters α and β(in our parametrization). We prove further that for SO_0(n, 1) there are finitely many complementary series of the form π_(α+β+2j,)j = 0, 1,..., k, appearing in the tensor product π_α ? π_βof two complementary series π_α and π_β, where k = k(α, β, n) depends on α, β and n. 展开更多
关键词 semisimple Lie groups unitary representations tensor products complementary series intertwining operators
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Multi-Party Quantum Private Comparison Protocol Based on Entanglement Swapping of Bell Entangled States
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作者 叶天语 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第9期280-290,共11页
Recently, Liu et al. proposed a two-party quantum private comparison(QPC) protocol using entanglement swapping of Bell entangled state(Commun. Theor. Phys. 57(2012) 583). Subsequently, Liu et al. pointed out that in L... Recently, Liu et al. proposed a two-party quantum private comparison(QPC) protocol using entanglement swapping of Bell entangled state(Commun. Theor. Phys. 57(2012) 583). Subsequently, Liu et al. pointed out that in Liu et al.'s protocol, the TP can extract the two users' secret inputs without being detected by launching the Bell-basis measurement attack, and suggested the corresponding improvement to mend this loophole(Commun. Theor. Phys. 62(2014) 210). In this paper, we first point out the information leakage problem toward TP existing in both of the above two protocols, and then suggest the corresponding improvement by using the one-way hash function to encrypt the two users' secret inputs. We further put forward the three-party QPC protocol also based on entanglement swapping of Bell entangled state, and then validate its output correctness and its security in detail. Finally, we generalize the three-party QPC protocol into the multi-party case, which can accomplish arbitrary pair's comparison of equality among K users within one execution. 展开更多
关键词 multi-party quantum private comparison Bell entangled state entanglement swapping information leakage
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Bivariate Gonarov polynomials and integer sequences
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作者 KHARE Niraj LORENTZ Rudolph YAN Catherine Huafei 《Science China Mathematics》 SCIE 2014年第8期1561-1578,共18页
Univariate Gonarov polynomials arose from the Goncarov interpolation problem in numerical analysis.They provide a natural basis of polynomials for working with u-parking functions,which are integer sequences whose ord... Univariate Gonarov polynomials arose from the Goncarov interpolation problem in numerical analysis.They provide a natural basis of polynomials for working with u-parking functions,which are integer sequences whose order statistics are bounded by a given sequence u.In this paper,we study multivariate Goncarov polynomials,which form a basis of solutions for multivariate Goncarov interpolation problem.We present algebraic and analytic properties of multivariate Gonarov polynomials and establish a combinatorial relation with integer sequences.Explicitly,we prove that multivariate Goncarov polynomials enumerate k-tuples of integers sequences whose order statistics are bounded by certain weights along lattice paths in Nk.It leads to a higher-dimensional generalization of parking functions,for which many enumerative results can be derived from the theory of multivariate Goncarov polynomials. 展开更多
关键词 Goncarov polynomials INTERPOLATION parking functions order statistics
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