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grinding checks
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     Principle of grinding
     磨削原理
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     Grinding Ceramics
     陶瓷的磨削
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     Cyclic redundancy checks in USB
     USB规范中CRC的原理与实现
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     On Electronic Checks in Perspective of Law
     电子支票的法律透析
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This paper deals with mapping abilities of Spacelab images (MC, Metric Camera), and its geo-applications. The 1:100000 and 1:200000 scale topographic maps and orthophotomap had been made from MC stereo-image, the results show that the high resolution MC images surely could meet the national standard at the scale of 1:100000 either for planimetric accuracy or for height-measuring, and could be used for revising map at scale of 1:50000.The digital combination of digitized MC image and Landsat MSS in both spatial...

This paper deals with mapping abilities of Spacelab images (MC, Metric Camera), and its geo-applications. The 1:100000 and 1:200000 scale topographic maps and orthophotomap had been made from MC stereo-image, the results show that the high resolution MC images surely could meet the national standard at the scale of 1:100000 either for planimetric accuracy or for height-measuring, and could be used for revising map at scale of 1:50000.The digital combination of digitized MC image and Landsat MSS in both spatial resolution and spectral characteristics were improved and it has some advantages for land use surveying and other geo-applications. The ground checking shows that the interpretation accuracy of land-use types were improved from 7% to 20% comparing with original Landsat MSS and MC images.

本文论述了空间实验室测量相机(MC)拍摄的彩色红外立体像对在中比例尺地形制图、正射影像地图以及土地资源调查中的应用可能性,给出1:10万和1:20万比例尺的制图例证,表明平面位置和高程精度能满足1:10万比例尺地形图规范要求;1:10万比例尺影像图可以满足专题制图精度要求。 应用数字图像处理技术,将二种来源(MC,MSS)的遥感数据做数字匹配,并进行信息提取、组合、增强和分类等处理,其结果与原始图像比较表明有独特的优越性,与MSS原始数据相比,图像的空间分辨率明显提高,各种类型界线更分明,可分辨类目增多;而与MC原始图像相比,其光谱特性获得改善且能保持原有的空间分辨率。土地利用类型解释精度与MSS和MC原始图像比较分别提高7—20%左右。

This paper reports on 58 cases of pregnant hypertension, who received a cerebral CT scan and an eye ground check. The CT scan showed 36 of them were normal and 22 suffered from cerebral anema or hemorhage with an incidence of 37.9%. Of the 36 cases that showed themselves to be normal by the CT scan, 17 changed in their eye grounds while of the 22 cases that showed cerebral changes on the CT scan, only 9 changed in their eye grounds. This indicates that there is no complete agreement between the CT scan...

This paper reports on 58 cases of pregnant hypertension, who received a cerebral CT scan and an eye ground check. The CT scan showed 36 of them were normal and 22 suffered from cerebral anema or hemorhage with an incidence of 37.9%. Of the 36 cases that showed themselves to be normal by the CT scan, 17 changed in their eye grounds while of the 22 cases that showed cerebral changes on the CT scan, only 9 changed in their eye grounds. This indicates that there is no complete agreement between the CT scan and the eye ground check.

报道1992~1994年间收治的重度妊娠高血压征(妊高征)85例发现,58例行脑CT扫描及眼底检查,其中36例脑CT扫描正常,22例有脑缺血、脑出血等改变,发生率为37.9%。36例脑CT检查正常者中,17例眼底有改变,而在22例脑CT有改变者中,9例有眼底改变。说明CT扫描结果与眼底检查并不完全一致。

With the support of GIS,this research,based on comprehensively selected natural landscape factors and human landscape factors,focusing on the regional distributing features of plough land destruction,soil pollution,soil erosion and soil impoverishment,making the best combination of both landscape factors and land degradation features,applying the representation method of geographic distribution map and the given mathematic model,makes a qualitative and quantitative comprehensive evaluation and a predictive regionalization...

With the support of GIS,this research,based on comprehensively selected natural landscape factors and human landscape factors,focusing on the regional distributing features of plough land destruction,soil pollution,soil erosion and soil impoverishment,making the best combination of both landscape factors and land degradation features,applying the representation method of geographic distribution map and the given mathematic model,makes a qualitative and quantitative comprehensive evaluation and a predictive regionalization of its sensibility on the active degrees and dangerous degrees of regional landscape of the land degradation,then analyzes its regional features. Fujian Province is located in the southeast of Mainland China,extending between 115°50′~120°43′ east longitude and 23°32′~28°22′ north latitude.The area investigated is as big as 12.42×10 4km 2,and the highest peak is 2,158m above sea level.Mountains and hills make up to 87.5% of the total area.It mainly consists of Mt.Daiyun and Mt.Wuyi,which approximately parallel with the coastline,incline to the southeast till the coast plain.From the northwest to southeast,the topographic configuration looks like an echelon,including the mountain,hill,mesa and plain.Natural vegetation mainly includes south subtropical monsoon forest and broad-leaved evergreen.Due to the influence of human activities,primitive vegetation was largely destroyed,current vegetation mainly includes various coenosium from different succession stage. The 1975 topographic map(1∶250000)and the landsat TM image obtained from the months of May to August,1996 were used in this research.Different kinds of thematic maps were created after the comprehensive application of the data.Though the training field was used to help classify data in the field map-making process,no ground check was taken to guarantee their accuracy.The researchers also collected data for fertilizing conditions of plough land crops.Thematic maps related to soil pollution degree were created after analyzing these data.Different kinds of thematic maps(including the administrative map)were digitized and input into GIS database.GIS provides a way to connect data collected from different spatial-temporal scales and grid and vector data used to map-making in different projections. The authors applied the analytic hierarchy process (AHP) to building up the layer structure for index system of activity degree regionalization for land degradation,and uses the expert-inquiry approach to index system inquiry.The index system of activity degree regionalization for land degradation was eventually obtained.According to the selection and calculated model of grade index,the authors selected 12 ecological destructive degree indexes which influence the land degradation in Fujian,and made a spatial simulation analysis on them with the GIS software.In the actual grade classification,the authors relied on the ratio histrogram distribution of niche destructive degree index,and classified the land degradation into four grades.They are the most activity degree,more activity degree,activity degree and less activity degree.The authors also calculated the area of different activity degree and its percentage proportion to the whole land area in Fujian.The research shows that the activity degree of land degradation has followed certain regional rules:the most activity grade is intensively located in the coast area,which parallels with the coastline,the more activity grade is centralized in the middle of the province,activity grade locates to the north of the more activity grade,and less activity grade variously distributes in the north and southwest of Fujian.On this condition,with the comprehensive social-economy factor index(comprehensive loss index)of each county(city)calculated,and the comprehensive risk index of land degradation(comprehensive risk index),the comprehensive risk index were calculated by using a mathematic model.Comprehensive regionalization indicates that land degradation with the most and more risky grade are centralized in v

在 GIS支持下 ,研究了福建土地退化的景观区域分异特征 ,综合预测了土地退化的景观变化趋势。利用地理分区图的表示方法和一定的数学模型理论 ,对福建省土地退化的区域景观活跃性程度和区域景观危险性程度进行定性与半定量相结合的综合评估与预测分区。目的主要是为土地退化的区域预报提供基本资料信息和减灾防灾决策提供服务。

 
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