Forest volume, the major component of forest biomass, is an important issue in forest resource monitoring.It is estimated from tree volume tables or equations. Based on tree volume data of 1840 sample trees from Chine...Forest volume, the major component of forest biomass, is an important issue in forest resource monitoring.It is estimated from tree volume tables or equations. Based on tree volume data of 1840 sample trees from Chinese fir （Cunninghamia lanceolata） plantations in Guizhou Province in southwestern China, parallel one- and two-variable tree volume tables and tree height curves for central and other areas were constructed using an error-in-variable modeling method. The results show that, although the one-variable tree volume equations and height curves between the central and other areas were significantly different, the two-variable volume equations were sufficiently close, so that a generalized two-variable tree volume equation could be established for the entire province.展开更多
An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, clo...An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.展开更多
目的探讨东芝320排CT Aquilion One Volume低剂量扫描在急诊膝关节检查中的应用,并联合软组织和骨算法进行MPR、VR等重建方法辅助诊断。方法2018年11月起始,截止2019年6月,针对性选取我院接受诊治的146例急诊膝关节损伤患者作为研究对象...目的探讨东芝320排CT Aquilion One Volume低剂量扫描在急诊膝关节检查中的应用,并联合软组织和骨算法进行MPR、VR等重建方法辅助诊断。方法2018年11月起始,截止2019年6月,针对性选取我院接受诊治的146例急诊膝关节损伤患者作为研究对象,根据扫描方式将研究对象分为实验组和常规组,实验组采用东芝320排CT Aquilion One Volume低剂量扫描,常规组采用相同设备螺旋CT常规扫描,观察并对比两组患者的图像质量与射线剂量。结果实验组和对照组图像合格率分别为91.8%和100.0%,两组图像质量对比无明显差异(P>0.05);两组患者的扫描范围相同,实验组CTDLvol平均值、DLP平均值、有效辐射剂量(ED)均显著优于常规组,两组射线剂量、平均值数据差异突出,对比结果有意义(P<0.05)。结论东芝320排CT Aquilion One Volume低管电压及低剂量扫描技术在急诊膝关节检查中的应用价值观突出,扫描速度快且图像质量较高,剂量明显低于常规螺旋CT扫描,有利于患者的辐射防护,同时可以保护球管延长其使用寿命,值得在临床中推广。展开更多
Background The airway inflammation could be assessed by some noninvasive approaches. To investigate the value of eosinophil counts in induced sputum and fractional concentration of exhaled nitric oxide （FENO） for th...Background The airway inflammation could be assessed by some noninvasive approaches. To investigate the value of eosinophil counts in induced sputum and fractional concentration of exhaled nitric oxide （FENO） for the regimen adjustment in patients with asthma, the correlation was analyzed between the two parameters and lung function parameter （forced expiratory volume in one second （FEV1））. Methods Sixty-five outpatients with mild to moderate non-exacerbation asthma from Beijing Chao-Yang Hospital were enrolled as treatment group. Combined medications of inhaled corticosteroids plus long-acting beta-2 agonist were administered for one year. Lung function parameters, eosinophil counts in induced sputum, concentration of exhaled nitric oxide and the Asthma Control Test scores were recorded, at regular intervals in the follow-up period. Twenty-one healthy volunteers were enrolled as control group and underwent examination of eosinophil counts in induced sputum, lung function and concentration of exhaled nitric oxide. Results Sixty-three subjects from treatment group completed follow-up period for one year or longer. Mean FEV1 value of the 63 subjects was （2.75±0.54） L at baseline, （2.97±0.56） L and （3.07±0.52） L at month 3 and month 6, respectively, and maintained as （3.14±0.51） L in the following six months. Mean FENO decreased from （61±25） parts per billion （ppb） at baseline to （32±19） ppb at month 3 （P 〈0.05）, and continued to decrease to （22±12） ppb at month 6, the difference being significant when compared to both baseline and control group （（13±8） ppb）. Mean eosinophil counts decreased to （0.032±0.011） ×106/ml at month 3, which was significantly different from baseline （（0.093±_0.023） xl06/ml） and the control group （（0.005±0.003）×l06/ml （both P 〈0.05）. The eosinophil counts in induced sputum correlated positively with concentration of FENO in the first six months （all P 〈0.05）. The concentration of FENO had a s展开更多
基金supported by the Agricultural Science and Technique Foundation of Guizhou Province, China (No. 2008-3059)the Research Funds of Forestry Administration of Guizhou Province, China (Nos. 2010-01-08, 2010-01, 200625)
文摘Forest volume, the major component of forest biomass, is an important issue in forest resource monitoring.It is estimated from tree volume tables or equations. Based on tree volume data of 1840 sample trees from Chinese fir （Cunninghamia lanceolata） plantations in Guizhou Province in southwestern China, parallel one- and two-variable tree volume tables and tree height curves for central and other areas were constructed using an error-in-variable modeling method. The results show that, although the one-variable tree volume equations and height curves between the central and other areas were significantly different, the two-variable volume equations were sufficiently close, so that a generalized two-variable tree volume equation could be established for the entire province.
基金Project(51274250)supported by the National Natural Science Foundation of ChinaProject(2012BAK09B02-05)supported by the National Key Technology R&D Program during the 12th Five-year Plan of China
文摘An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.
文摘目的探讨东芝320排CT Aquilion One Volume低剂量扫描在急诊膝关节检查中的应用,并联合软组织和骨算法进行MPR、VR等重建方法辅助诊断。方法2018年11月起始,截止2019年6月,针对性选取我院接受诊治的146例急诊膝关节损伤患者作为研究对象,根据扫描方式将研究对象分为实验组和常规组,实验组采用东芝320排CT Aquilion One Volume低剂量扫描,常规组采用相同设备螺旋CT常规扫描,观察并对比两组患者的图像质量与射线剂量。结果实验组和对照组图像合格率分别为91.8%和100.0%,两组图像质量对比无明显差异(P>0.05);两组患者的扫描范围相同,实验组CTDLvol平均值、DLP平均值、有效辐射剂量(ED)均显著优于常规组,两组射线剂量、平均值数据差异突出,对比结果有意义(P<0.05)。结论东芝320排CT Aquilion One Volume低管电压及低剂量扫描技术在急诊膝关节检查中的应用价值观突出,扫描速度快且图像质量较高,剂量明显低于常规螺旋CT扫描,有利于患者的辐射防护,同时可以保护球管延长其使用寿命,值得在临床中推广。
文摘Background The airway inflammation could be assessed by some noninvasive approaches. To investigate the value of eosinophil counts in induced sputum and fractional concentration of exhaled nitric oxide （FENO） for the regimen adjustment in patients with asthma, the correlation was analyzed between the two parameters and lung function parameter （forced expiratory volume in one second （FEV1））. Methods Sixty-five outpatients with mild to moderate non-exacerbation asthma from Beijing Chao-Yang Hospital were enrolled as treatment group. Combined medications of inhaled corticosteroids plus long-acting beta-2 agonist were administered for one year. Lung function parameters, eosinophil counts in induced sputum, concentration of exhaled nitric oxide and the Asthma Control Test scores were recorded, at regular intervals in the follow-up period. Twenty-one healthy volunteers were enrolled as control group and underwent examination of eosinophil counts in induced sputum, lung function and concentration of exhaled nitric oxide. Results Sixty-three subjects from treatment group completed follow-up period for one year or longer. Mean FEV1 value of the 63 subjects was （2.75±0.54） L at baseline, （2.97±0.56） L and （3.07±0.52） L at month 3 and month 6, respectively, and maintained as （3.14±0.51） L in the following six months. Mean FENO decreased from （61±25） parts per billion （ppb） at baseline to （32±19） ppb at month 3 （P 〈0.05）, and continued to decrease to （22±12） ppb at month 6, the difference being significant when compared to both baseline and control group （（13±8） ppb）. Mean eosinophil counts decreased to （0.032±0.011） ×106/ml at month 3, which was significantly different from baseline （（0.093±_0.023） xl06/ml） and the control group （（0.005±0.003）×l06/ml （both P 〈0.05）. The eosinophil counts in induced sputum correlated positively with concentration of FENO in the first six months （all P 〈0.05）. The concentration of FENO had a s
