虚拟切片在病理学实验教学中的应用

病理学是研究疾病的形态学改变为主的基础医学学科,病理学实验教学通过观察疾病的形态学变化,帮助学生掌握各种疾病的病变,通过将虚拟切片替代以往实验课大多采用的HE切片进行教学效果的对比分析,结果表明,虚拟切片数学可明显提高教学效果。     

虚拟切片技术在组织胚胎学实验教学中的应用研究

随着计算机虚拟现实技术、网络技术和数字媒体技术的不断发展,虚拟现实技术已在医学院校实验教学中广泛应用。本文主要介绍虚拟现实技术的概念、虚拟切片在我校组织胚胎学实验教学中的实例以及作用,说明虚拟现实技术对组织胚胎学实验教学的深远影响。     

三维病理大体标本数字图像库的建立及实验教学

病理学是一门介于基础医学和临床医学之间的桥梁学科,学好病理学对医学生至关重要。病理学教学过程中,病理学实验是很重要的一个环节,通过观察病理大体标本和切片可以加深对疾病发生发展过程及临床症状的理解和认识。但标本的陈旧,数量少等问题,影响了病理学教学质量。随着数字化技术的出现和日渐成熟,利用三维立体成像技术构建大体标本的数字三维影像,弥补了当前大体标本缺乏,实现病理实验教学手段的革新,构建集直观性和实践性于一体的病理学实验教学新的方法,为提高实验教学质量,培养高素质,综合能力强的医学人才找到了新的突破口。     

数字化切片在我校病理学实验教学中的应用初探

使用数字化切片取代传统玻璃切片进行病理学实验教学，能使切片教学更具代表性，并能使教学资源得到充分利用和整合。利用数字化切片进行教学还可以优化教学模式，方便学生自主学习及远程学习，提高学生的学习效率及学习兴趣。     

基于网络的虚拟现实技术在高校实验教学中的应用

随着计算机网络和虚拟现实技术的不断发展,网络虚拟实验室在高校实验教学过程中扮演着越来越重要的角色。文章引入了虚拟实验室的概念并分析其优缺点,通过深入介绍化学化工学院使用虚拟实验室的情况,指出基于网络和虚拟现实技术的虚拟实验室是高校实验教学改革的必然趋势,是对传统实验教学的有力补充。     

计算机虚拟实验教学浅析

虚拟技术引入实验教学，将引发实验教学模式的变革，解决传统实验没有解决的问题。文章结合四川乐山师范学院虚拟技术在实验教学中的应用，提出了高校虚拟实验教学的必要性。     

虚拟仪器在电工测量实验课中的应用研究

随着计算机科学和微电子技术的发展,虚拟仪器在实验教学中逐渐得到广泛的应用.本文结合基于虚拟技术的电工测量仪表的研发过程,以及在实验教学应用中的效果分析,就如何利用虚拟技术,加强和促进实验教学改革做一粗浅的探讨.     

蓝拟实验在医学化学实验教学中的应用

虚拟实验技术在医学化学实验教学中的应用是科技发展趋势，与真实实验相结合能显著提高教学质量。本文阐述了虚拟实验在医学化学实验教学中应用的必要性，探讨了虚拟医学化学实验室的构建。     

虚拟实验的研究现状以及在教学中的意义

高校要培养高素质技能型人才,就必须重视专业实验教学。随着信息技术的发展,作为传统实验教学的一种有效的补充,虚拟实验教学已经成为加强实践教学、提高教学质量的重要手段。开展虚拟实验可以有效地解决实验场地设备不足的问题,还可以利用虚拟实验开展科学研究。虚拟实验是利用计算机及仿真软件来模拟实验的环境及过程。开展虚拟实验,首先要了解虚拟实验的概念、特征与作用;其次,要研究目前国内外开展虚拟实验的现状,掌握虚拟实验的发展前景。本文从分析虚拟实验技术的理论基础出发,阐述了虚拟实验技术的分类,论述了它在实验教学中的重要意义,并对虚拟实验技术在实验教学中的应用进行了探索。     

精品课"数控技术"虚拟实验教学的研究

针对当前数控技术实验教学中存在的问题，提出了开展数控技术虚拟实验教学的必要性。明确指出了虚拟实验教学的特点，并分析了开展数控技术虚拟实验教学的可行性。介绍了数控技术虚拟实验教学模型的构成。虚拟实验教学十分适合新世纪人才培养模式，在高校实验教学中具有广阔的应用前景。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.