This paper addresses the concept and characteristics of virtual geographic environments ( VGE).

1、

Terrain is the carrier of Virtual Geographic Environment ( VGE).

地形是虚拟地理环境的承载体。

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2、

VGE is the virtual reality based on the geo-analysis models and geo-project, which describes geography systematic space distribution as well as the virtual information geography world of process phenomenon established by geographical worker according to observation experiment and theoretical assumption.

虚拟地理环境是基于地学分析模型、地学工程等的虚拟现实，它是地学工作者根据观测实验、理论假设等建立起来的表达和描述地理系统的空间分布以及过程现象的虚拟信息地理世界。

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3、

Semantic information in VGE is a type of interactive knowledge, which can achieve a natural and efficient human-computer interaction.

虚拟地理环境中的语义信息可以作为交互知识，通过它可以实现自然高效的人机交互。

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4、

The definition of VGH is given and the mapping relationships are analyzed between features in VGH and captions in an image.

文章给出VGH的定义，对其中的特征及其与图像中字幕的映射关系作了分析，并在此基础上给出视频字幕的检测与定位方法。

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5、

The paper presents a variant gray scale histogram ( VGH) for the purpose of detecting and locating captions in video images.

为实现视频图像中字幕的快速检测与定位，本文提出一种变异灰度直方图VGH。

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6、

An algorithm for text detection based on edge detection and VGH

基于边缘信息和局部直方图的视频文字检测法

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7、

All of that volunteered geographic information ( VGI as Michael Goodchild calls it) should be brought into geographic information systems so that we can understand it.

所有的自愿提供的地理信息应该将其保存在地理信息系统里，以便我们能理解它。

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8、

This paper mainly emphases how to make the VGI as an effective data source of professional survey department to detect the changed for updating.

本文的研究重点在于如何将自发地理信息作为专业测绘部门发现变化和数据更新的有效数据来源。

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9、

Vacuum gas nitriding ( VGN) technology was adopted and evaluated for well casing to against the corrosion in Changqing oilfield.

针对长庆油田油井套管腐蚀问题，采用并评价了真空渗氮工艺。

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10、

Energetically developing hydrogenation units for deep processing VGO and residual oil

我国蜡油及渣油深加工应大力发展加氢型装置

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11、

The operation of vacuum residue hydrodesulfurization unit imported by Qilu Petrochemical Company and FCCU which processes the obtained VGO and residue as mixed feedstock was discussed.

介绍了齐鲁石化公司引进的减压渣油加氢脱硫装置生产及催化裂化装置掺炼其产品蜡油和渣油的情况。

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12、

Study on the reaction mechanism for Daqing VGO over acid catalyst

大庆蜡油在酸性催化剂上反应机理的研究

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13、

The important factors influencing the effluent VGP of UASB-R I were the same as that of UASB-R II.

UASB-RⅠ和UASB-RⅡ的出水DNP和%CH4的影响因素的主次顺序则是一致的。

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14、

Study of secular variation of geomagnetic field by means of VGP

用虚地磁极（VGP）方法对地磁场随时间变化的研究

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15、

The paleomagnetic declination, inclination, VGP and relative intensity of three regions represent both individual features and features in common.

结果表明，上述三区古地磁场的磁偏角、磁倾角、虚地磁极迁移以及相对强度既存在各自的局部特性，又有着共同的整体特征。

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16、

Objective To observe the effects of cholinergic agonists on intracellular calcium concentration ( [ Ca 2+] I) of isolated vestibular hair cells ( VHC) from the guinea pig and the effects of gentamicin on it.

目的通过观察胆碱能受体激动剂对离体前庭毛细胞内钙离子浓度的影响，以探讨前庭毛细胞膜所存在的胆碱能受体分型及庆大霉素对钙离子通道的阻断作用。

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17、

Postoperative regurgitation, stenosis, and immune rejection occur, lead to a pipeline of early loss of power, need to double or multiple surgeries to replace the VHC.

术后常因发生反流、狭窄及免疫排斥而导致管道早期失功，需二次或多次手术更换VHC。

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18、

Objective: This study is to review the early experience of cryopreserved valved homograft conduit ( VHC) for congenital heart disease in children.

目的：报告应用同种带瓣管道（VHC）在儿童先心病治疗中的经验。

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19、

Conclusion: The satisfactory results indicate that VHC is the ideal material for the treatment of congenital heart disease in children.

结论：本组结果表明VHC是儿童先心病右室流出道重建的理想材料。

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20、

VHE& A Service-provided Method in Future Heterogeneous Network Environment

VHE&未来异构网络环境下的业务提供方法

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