视觉的指向——当代具象造型表达的扩融

科技推动数字技术与媒介高速发展的当下,转变了传统的视觉环境和视觉模式,当代具象造型在新的视觉经验和语言结构的融合中,正持续突破其造型表达的边界。文章通过对当代具象造型的视觉环境、构成形态、转化方式和再现领域展开研究,结合造型系统、造型语言和视觉媒介的分析,面对今天以及未知未来的视觉环境和造型方式,探讨运用一种包容、开放和创新的视觉理念,在极具视觉指向性的艺术语言建构中持续对当代具象造型表达进行扩融。

分散弹性融扩式教学实践的设计和控制

文章探索分散弹性融扩式教学实践模式。讨论分散弹性融扩式教学实践的设计和质量、过程。

亚洲金融危机、美元霸权和美国的金融扩张

亚洲金融危机中，众多亚洲国家和地区损失惨重。美国负债天下第一。１９９５年，政府债务高达５万亿美元，人均２万美元。国际收支、对外贸易多年逆差。１９９７年，美国国际贸易逆差高达１１３７亿美元，制造业贸易逆差高达１８２０亿美元。为什么美国没有发生金融危机？...

提升沿海地区城市竞争力的研究——以江苏省盐城市为例

选取12大类,44项指标,运用R型因子分析法对江苏省13个城市的经济竞争力、社会竞争力、人居环境竞争力进行计算,在此基础上得出各城市的综合竞争力。统计结果表明:盐城市的各项竞争力指数均在75以下,位于第三等级,与苏中、苏南各市差距明显。对如何提升盐城综合竞争力进行了思考,并提出东扩南融的发展思路。

国际化新城建设背景下通州旅游产业文化特质研究

本文基于承担通州旅游为年度科研课题的研究成果,以研究通州旅游产业的文化特质为主题,主张发展通州文化旅游产业应坚持融贯性和扩展性、承袭性与时尚性、动态性和体验性的辩证统一,并提出"旅游体"概念。

Effects of Concentration and Freeze-Thaw on the First Hydration Shell Structure of Zn^(2+) Ions

To investigate the effects of salt concentration and freeze-thaw (FT) on the first hydration shell of Zn2+ ions in Zn(NO_3)_2 aqueous solutions, extended X-ray absorption fine structure (EXAFS) spectroscopy was used to examine Zn K-edge EXAFS spectra of Zn(NO_3)_2 aqueous solutions with various concentrations before and after FT treatment. The influences of salt concentration and freeze-thaw on the structural parameters of the first hydration shell of Zn2+ ions, including hydration number, Zn-O distance and thermal disorder, were analyzed. The results show that Zn2+ ions have 3.2―6.8 nearest oxygen neighbors with the Zn-O distance being 0.202―0.207 nm. In highly concen-trated solutions, Zn2+ ions are hydrated with four water molecules in a tetrahedral form. The dilution of Zn(NO_3)_2 aqueous solutions increases the number of water molecules in the first hydration shell of Zn2+ ions to six with their octahedral arrangement. Both the hydration number in the first hydration shell of Zn2+ ions and the degree of thermal disorder increase when the FT treatment is operated in Zn(NO_3)_2 aqueous solutions.

The Diffusion of Bilateral Tendencies in the Common Trade Policy of the European Union During the Global Financial and Economic Crisis

In this research work, the author focuses on the analysis of the diffusion of bilateral tendencies in the common trade policy of the European Union （EU） during the global financial and economic crisis. Realistic point is important trends in the trade regime during the economic crisis. The decisions taken by the representatives of the governments participating in the World Trade Organisation （WTO） are, to a significant degree, influenced by various lobbies, such as organisations and unions of food producers or other non-governmental organisations, including trade unions, The main objective of the research task is to give a comprehensive analysis of the international trade policy during the world financial and economic crisis 2008-2010. The particular mains concern the political economy models of foreign trade policy, protectionistic pressures in different political system, the level of protectionistic pressures, food producer pressures, international trade liberalization, and environmental protection bilateral tendencies in the common trade policy of the EU and the respond of the EU to the economic crisis, it must be emphasized that on a theoretical level, understanding the choice of trade policies between liberalizm and protectionisme is very important. Despite the undeniable benefits of the multilateral WTO forum for trade liberalisation, the rapid increase of North-South bilateral and multilateral Free Trade Areas （FTAs） begs a systematic explanation for why some forums are prioritized relative to others.

Application of interacting multiple model in integrated positioning system of vehicle

To solve low precision and poor stability of the extended Kalman filter （EKF） in the vehicle integrated positioning system owing to acceleration, deceleration and turning （hereinafter referred to as maneuvering） , the paper presents an adaptive filter algorithm that combines interacting multiple model （IMM） and non linear Kalman filter. The algorithm describes the motion mode of vehicle by using three state spacemode]s. At first, the parallel filter of each model is realized by using multiple nonlinear filters. Then the weight integration of filtering result is carried out by using the model matching likelihood function so as to get the system positioning information. The method has advantages of nonlinear system filter and overcomes disadvantages of single model of filtering algorithm that has poor effects on positioning the maneuvering target. At last, the paper uses IMM and EKF methods to simulate the global positioning system （OPS）/inertial navigation system （INS）/dead reckoning （DR） integrated positioning system, respectively. The results indicate that the IMM algorithm is obviously superior to EKF filter used in the integrated positioning system at present. Moreover, it can greatly enhance the stability and positioning precision of integrated positioning system.

Dynamic assets allocation based on market microstructure model with variable-intensity jumps

In order to characterizc large fluctuations of the financial markets and optimize financial portfolio, a new dynamic asset control strategy was proposed in this work. Firstly, a random process item with variable jump intensity was introduced to the existing discrete microstructure model to denote large price fluctuations. The nonparametric method of LEE was used for detecting jumps. Further, the extended Kalman filter and the maximum likelihood method were applied to discrete microstructure modeling and the estimation of two market potential variables： market excess demand and liquidity. At last, based on the estimated variables, an assets allocation strategy using evolutionary algorithm was designed to control the weight of each asset dynamically. Case studies on IBM Stock show that jumps with variable intensity are detected successfully, and the assets allocation strategy may effectively keep the total assets growth or prevent assets loss at the stochastic financial market.

Valuation of equity-indexed annuities with regime-switching jump diffusion risk and stochastic mortality risk

This paper extends the model and analysis of Lin, Tan and Yang （2009）. We assume that the financial market follows a regime-switching jump-diffusion model and the mortality satisfies Levy process. We price the point to point and annual reset EIAs by Esscher transform method under Merton＇s assumption and obtain the closed form pricing formulas. Under two cases： with mortality risk and without mortality risk, the effects of the model parameters on the EIAs pricing are illustrated through numerical experiments.

Traveling wave solutions of a delayed prey-predator system with diffusion

This paper discusses the existence of traveling wave solutions of delayed reaction-dif- fusion systems with partial quasi-monotonicity. By using the Schauder＇s fixed point theorem, the existence of traveling wave solutions is obtained by the existence of a pair of upper-lower solutions. We study the existence of traveling wave solutions in a delayed prey-predator system.

The magmatic activity mechanism of the fossil spreading center in the Southwest sub-basin, South China Sea

Petrogeochemical data indicate that after the end of seafloor spreading,residual magmatic activity still exists in the deep basin of the South China Sea.By using different viscous structure models beneath the fossil spreading center of the Southwest sub-basin we simulated the amount of melt produced,the length of the melting period,and the thermal evolution process in terms of geothermics and the buoyant decompression melting mechanism.We compared the results of our model with observed heat flow,seismic,and petrogeochemistry data.The results show that depletion buoyancy induced by buoyant decompression melting plays an important role in the melting process,while retention buoyancy,thermal buoyancy,and viscous shear force have only a weak influence on the melting process.From the length of the melting period,we determined that for the three viscous structures models the magmatic activity lasted about 5,12,and 15 Ma.Under the effect of buoyant depression melting,local high-temperature areas will develop under the basin,which can explain the low-velocity layer detected by seismic exploration in the middle and upper lithosphere of the Southwest sub-basin.We also simulated the possible lithology distribution beneath the fossil spreading center with the physical conditions of different viscous structure,different temperature structure,and different melting fraction,which provided a greater understanding of the rock petrogeochemical data of the deep sea basin in the South China Sea.

AMERICAN OPTION PRICING UNDER GARCH DIFFUSION MODEL: AN EMPIRICAL STUDY

The GARCH diffusion model has received much attention in recent years, as it describes financial time series better when compared to many other models. In this paper, the authors study the empirical performance of American option pricing model when the underlying asset follows the GARCH diffusion. The parameters of the GARCH diffusion model are estimated by the efficient importance sampling-based maximum likelihood （EIS-ML） method. Then the least-squares Monte Carlo （LSMC） method is introduced to price American options. Empirical pricing results on American put options in Hong Kong stock market shows that the GARCH diffusion model outperforms the classical constant volatility （CV） model significantly.