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厘米级平板定位测绘技术 被引量:1
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作者 李忠林 《河北林业科技》 2017年第3期68-70,共3页
目前县级林业测绘主要使用工具为手持GPS,把现场实测的数据录入到电脑Arcgis系统中进行点、线、面的编辑,最终完成准确的测绘地图。为了让林业测绘更加简单方便,研究通过克服手持GPS和奥维地图软件的缺点,解决并完成平板arcgis+实时定... 目前县级林业测绘主要使用工具为手持GPS,把现场实测的数据录入到电脑Arcgis系统中进行点、线、面的编辑,最终完成准确的测绘地图。为了让林业测绘更加简单方便,研究通过克服手持GPS和奥维地图软件的缺点,解决并完成平板arcgis+实时定位的新型林业测绘技术途径。通过注册安装平板专用Arcgis系统:Live Map Gis软件(app)、以及注册安装Bigmap地图下载器获取高清谷歌实景卫片地图及纠偏方法等综合技术措施,实现平板与电脑arcgis在地图、村界、县界、等高线、小班以及专题图等图层数据的一致。平板定位雨滴图标与实景卫片地图纠偏吻合后,选择--采集--点(图层)--手绘--在平板上用电容笔定位置——√,就会出现图层概况界面,里面会有当前位置精准的点坐标,将此点坐标录入到电脑arcgis里,误差应该可以达到厘米级。 展开更多
关键词 厘米级 平板定位 LiveMapGis 手持GPS 实时定位
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摩托车轮毂气门孔钻削夹具的改进设计 被引量:1
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作者 叶正余 叶海见 吕允刚 《摩托车技术》 2011年第6期47-50,共4页
摩托车轮毂是采用铝合金材料浇注而成的,轮辋直径的变形量大,原钻削气门孔的夹具是以轮毂轴承孔作为定位基面,气门孔深度难以保证,产品报废率高;另外,夹具平板不能调整角度,不能适应倾斜气门孔的加工要求。通过对夹具进行改进设计,将气... 摩托车轮毂是采用铝合金材料浇注而成的,轮辋直径的变形量大,原钻削气门孔的夹具是以轮毂轴承孔作为定位基面,气门孔深度难以保证,产品报废率高;另外,夹具平板不能调整角度,不能适应倾斜气门孔的加工要求。通过对夹具进行改进设计,将气门孔底部作为定位基准,并将夹具平板设计成角度可调整型,从而大大降低了产品报废率。 展开更多
关键词 小孔深度 定位方式可调平板
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Outcome of open reduction and internal fixation of intraarticular calcaneal fracture fixed with locking cal- caneal plate 被引量:25
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作者 Saurabh Jain Anti Kumar Jain Ish Kumar 《Chinese Journal of Traumatology》 CAS CSCD 2013年第6期355-360,共6页
Objective:Debate continues regarding the management of calcaneal fractures,between open reduction and internal fixation and closed treatment.Hence we aim at evaluating the radiological and functional outcomes of open... Objective:Debate continues regarding the management of calcaneal fractures,between open reduction and internal fixation and closed treatment.Hence we aim at evaluating the radiological and functional outcomes of open reduction and internal fixation in displaced joint depression type of calcaneal fractures fixed with locking calcaneal plate.Methods:In this series,28 patients (26 unilateral and 2 bilateral) with joint depression type of calcaneal fractures as per Essex-Lopresti classification system were operated on with locking calcaneal plate within 3 weeks of injury.Patients were evaluated in terms of associated injuries and X-rays of anteroposterior,lateral and axial views of the calcaneum.CT scan was done to assess the amount ofcomminution and articular depression.Patients were followed up clinically and radiologically at least for 1 year.Radiological assessment was done by Bohler's angle and Gissane's angle along with measurement ofcalcaneal height and width.Functional outcome was assessed using the American Orthopaedics Foot and Ankle Society (AOFAS) scale.Results:At average follow-up of 14.5 months,average AOFAS score was 86.3 (range 66 to 97),with 86% having excellent to good results and 2 (7.7%) and 1 (3.7%) having fair and poor results respectively.All patients had stable ankle joint with all having dorsiflexion and plantar flexion more than 30°.Average subtalar range of motion was 17°.The mean Bohler's angle,mean Gissane's angle,calcaneal height and width were 25.47°,121.3°,4.32 cm and 3.81cm respectively at final follow-up.Three patients had flap necrosis at incision site and one had superficial and deep infection.Subtalar arthritis was seen in 5 patients,whereas sural nerve hypoaesthesia in 1 patient.None of the patients had compartment syndrome,heel pad problems,peroneal tendinitis,reflex sympathetic dystropy or implant failure.Conclusion:Open reduction and internal fixation with locking calcaneal plate gives sound functional outcome,i.e.restoring anatomically reconstruction of height,width,Bohler's and Gissiane's angles of the calcaneum,and allowing early mobilization. 展开更多
关键词 CALCANEUS Fractures bone Boneplates Fracture f'ocation internal
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