基于VPN企业办公系统的设计及实现

虚拟专用网络（VPN：Virtual Private Networks）是Internet技术迅速发展的产物，能提供与专网类似的安全性，可靠性，优先级别和可管理性，为企业内部的工作和业务流程自动化、信息化提供了网络平台，首先介绍了VPN的基本原理，提出了一种基于VPN技术的办公系统设计方案，给出了基于VPN技术实现企业办公的网络平台规划、软件平台规划和全网的安全保护措施，为企业实现“扁平化”管理提供物理平台，利用群件系统实现日常办公流程、工作流程，为企业实现EPR打下基础。     

基于VPN技术企业办公系统的设计及实现

虚拟专用网络 (VPN:Virtual Private Networks)是 Internet技术迅速发展的产物 ,能提供与专网类似的安全性、可靠性、优先级别和可管理性 ,为企业内部的工作和业务流程自动化、信息化提供了网络平台。首先介绍了 VPN的基本原理 ,提出了一种基于 VPN技术的办公系统设计方案 ,给出了基于 VPN技术实现企业办公的网络平台规划、软件平台规划和全网的安全保护措施 ,为企业实现“扁平化”管理提供物理平台 ,利用群件系统实现日常办公流程、工作流程 ,为企业实现 ERP打下了基础。     

基于VPN远程访问Intranet的实现

利用VPN技术，可以在现有的公用网络平台上构筑不受地域限制而受企业统一策略控制和管理的Intranet。本文从VPN的基本概念出发，探讨了其基本特征和解决方案，并给出了利用VPN技术远程访问NT局域网的实现过程。     

基层体工大队网络平台的规划与设计

设计和规划了一个通用网络平台，即可以满足体工大队对因特网信息的需求，又可以提供安全的运行环境供内部信息管理系统使用。该网络平台综合使用有线网和无线网技术，确保网络的可用性和稳定性。同时，应用防火墙技术、三层交换技术和VPN功能组建网络，即保证了网络的相对安全性，也方便员工的使用，从而更好地为基层体工大队提供一个良好的信息交换平台。     

校园网建设规划

校园网是利用现代网络技术、多媒体技术等为基础建立起来的计算机网络，为学校的教学、管理、办公、信息交流和通讯等提供综合的网络平台。文章就校园网总体建设规划、网络安全平台建设和校园网功能实现三方面进行了简要介绍。     

浅谈校园网建设规划

校园网是利用现代网络技术、多媒体技术及Internet技术等为基础建立起来的计算机网络，为学校的教学、管理、办公、信息交流和通讯等提供综合的网络应用环境。文章就校园网总体建设规划、构筑安全网络平台和校园网功能实现三方面进行了简要介绍。     

浅析VPN在企业移动办公和远程接入中的应用

迅速发展的广域网技术使公网带宽成倍增长,同时又为企业VPN网络提供了广阔的发展空间。VPN技术已逐渐成为企业网安全建设的必要选择。本文针对市场应用的发展需求,介绍了企业移动办公VPN应用和NAT情况下的VPN应用方案,及其采用硬件加速VPN处理的重要性。     

VPN客户端在Windows2000下的实现

简要介绍了IPSec协议体系结构以及在Windows平台下利用NDIS驱动程序接口技术开发基于IPSec协议的VPN客户端软件的方法后，利用流程图阐述了内核模块输入和输出处理的过程以及应用模块的实现。这种借鉴有线网络中的VPN技术和Windows环境编程技术为安全移动办公提供了一种新思路。     

基于IP—VPN的协同设计网络安全问题

异地协同设计与制造技术作为敏捷制造的重要方法和手段，已经成为制造业研究的热点。介绍了IP－VPN的基本概念和关键技术，提出了一个基于IP－VPN的实用协同设计网络模型，而异地协同设计是典型的多用户参与的多任务系统，用户之间存在大量的协同过程，因此网络平台的安全性是协同设计实施的关键问题，对基于IP－VPN的协同设计网络的安全性问题进行了研究，得出了通过采用数据加密、用户认证和基于角色的多层强制访问控制等技术可以构建一个经济、实用、安全的协同设计网络平台的结论。     

三基于企业网的VPN应用方案

分析了虚拟专用网技术的原理,针对企业网实际运行中出现的问题,提出了一种基于企业网的VPN应用方案,将VPN技术应用于基于公共互联网构架的企业网,较好的解决了企业网多办公地点、远程访问、远程管理等问题.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

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

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.