Successful application of optimized aperture based CRS stack in the Shengli exploration area

The common reflection surface （CRS） stack is based on the local dip of the reflector and the reflection response within the first Fresnel zone. During the CRS stack all the information given by a multi-coverage reflection dataset can be successfully utilized. By now, it is known as the best zero-offset （ZO） imaging method. In this paper high quality CRS kinematic parameter sections are obtained by a modified CRS optimization strategy. Then stack apertures are calculated using the parameter sections which finally results in the realization of the CRS stack based on optimized aperture. Thus the advantages of CRS parameters are fully developed. Application to model and real seismic data reveals that, compared with the image section by a conventional CRS stack, the image section by CRS stack based on an optimized aperture improves both the signal-to-noise ratio and the continuity of reflection events.

ALTERNATIVE METHODS FOR CONDUCTING COMPARATIVE ANALYSES OF CADASTRAL SYSTEMS

The conception of an efficient cadastral system is an important element in the development of each coun-try.It is crucial for the efficient operation of the real estate market-the security and liberty of making tr ansactions,register-ing a property,planning operations,the introduction of an ad valorem tax on property and more rational use of space.In Europe there are different types of c adastral systems,because the count ries in Europe have different cultur al back-grounds,different economical and s ocial backgrounds.Through the cent uries,many types of cadastral syste ms evolved and their differences often depend u pon local cultural heritage,physic al geography,land use,technology,etc.Compara-tive analyses of cadastral systems h ave been the subjects of many publica tions and studies in world literatur e.It was as-sessed that the useful tools in conducting comparative analyses of vario us cadastral systems include the pro cedures of statisti-cal inference.This paper presents t he results of a project to compare the performance of ten cadastral system s international-ly by creating appropriate integrated indicators of a cadastral system u sing statistical technique.Such in dicators will make it possible to compare differen t cadastral systems and present them hierarchically in relation to their quality,struc-ture,as well as legal,organization al and technological solutions.Fro m a good number of methods available,techniques originating from two spheres of statistic inference were selected:distribution free methods and multivariate analysis meth-ods.For analyses with the distribut ion free methods,FRIEDMAN’s test(FRIENDMAN’s non-parametric varian ce analy-sis)as well as KENDALL’s test(KENDALL’s compatibility ratio)were selected.For analyses with the multivariate analy-sis methods,factor analysis was selected.

The Evolutionary Rules of Production System

The competition among modem enterprises has been converted from products to capability. As the basis of competition, production system can＇t win the market unless it takes advantage of its capability in competition. Here in this article, the evolutionary rules of production system contributing to the establishment, renovation, reform, invention and promotion of the production of modem enterprises are observed.

A two-tier location management mechanism for IMS

This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and the home network registration, in which the visited network registration is responsible for re-registration in IMS. When subscriber roams, the location information of home network will be updated by the visited network based on the change of user equipment （UE）＇ s IP address. Thereibre the TTLM can reduce the times of IMS registration signaling. Using the proposed analytical model, the performance of the CR and the proposed TTLM were investigated. After the performance analysis of CR and TTLM by using proposed analytical model, the cost of CR in IMS could significantly be reduced theoretically and also was proven by simulation experiments.

Column Analyses of Chloride Breakthrough and Lead Retention in Amended Sandy Soils

Stormwater quality design manuals lack scientifically creditable bases for many novel LID （Low-Impact Development） designs presently proposed to meet stormwater runoff management requirements. Potential stormwater pollutant adsorption and infiltration enhancement capabilities of forest-derived by-products （e.g. woodchips, bio-char） provide an opportunity to combine these readily availability materials into stormwater quality designs. On-site stormwater runoff treatment through determination of the soil-water transport and lead （Pb） retention capacity of two sandy soils from Oregon is considered. Using synthetic stormwater （-120 mg CI/L and -5 mg Pb/L） displacement tests in pairs ofABS （Acrylonitrile butadiene styrene） soil columns （75 mm dia by 0.46 m tall） with upward flow （to minimize air entrapment） saturated hydraulic conductivity, chloride dispersion and Pb retention by plain and amended soils is evaluated. Generally, soil amendment incorporation （woodchips, compost or biochar） as compared to an amendment layer resulted in improved hydraulic conductivities as compared to that of the soil alone. Chloride breakthrough curves verified that resident soil-water displacement occurred with 0.9 to 1.6 pore volumes and residence times for most columns were 15-30 minutes. No synthetic stormwater Pb ＂breakthrough＂ within the displaced or replaced soil-water was found, rather most Pb was adsorbed within the first 150 mm of soil.

“四川大学《儒藏》首发式及学术研讨会”综述

经过八年的认真准备和艰苦努力,《儒藏》首批成果终于在四川大学问世.首批出版的50册系儒学史料的首次收集和整理,字数达2600余万,被学人喻为'千古儒学第一藏'。它的出版结束了儒学自古无“藏”的历史,2500余年的儒学文献进入了系统汇集、編录和整理出版的阶段。“二氏有藏,吾儒何独无有”的浩叹自此终成历史。

Global Smooth Solutions to the 2-D Inhomogeneous Navier-Stokes Equations with Variable Viscosity

Under the assumptions that the initial density ρ0 is close enough to 1 and ρ0-1∈Hs+1(R2);u0∈Hs(R2)∩H_∈(R2) for s>2 and 0<ε<1;the authors prove the global existence and uniqueness of smooth solutions to the 2-D inhomogeneous Navier-Stokes equations with the viscous coefficient depending on the density of the fluid.Furthermore,the L2 decay rate of the velocity field is obtained.