Three types of material as platen in contact drying process were tested in Composition Board Laboratory of Northeast Forestry University in 1998. Poplar veneers were dried under’0.3 MPa at 160℃ or 180℃. Through com...Three types of material as platen in contact drying process were tested in Composition Board Laboratory of Northeast Forestry University in 1998. Poplar veneers were dried under’0.3 MPa at 160℃ or 180℃. Through comparison a non-metal flexible material was chosen as screen for designing contact dryer and replacing curved metal plate. The new type contact dryer solved the problem of long auxiliary time by loading wet veneers into press and unloading dried veneers out of press at the same time. This increased productivity. Veneer’s moisture content(MC) varied with drying time in index law. The process of contact drying with non-metal flexible screen was analyzed by stages of preheating, high-speed drying, retarded drying and extremely slow drying.展开更多
The moisture contents (MC) of popular veneers were tested in Composition Board Laboratory of Northeast Forestry University by contact drying with flexible screen. The influence factors considered included temperature,...The moisture contents (MC) of popular veneers were tested in Composition Board Laboratory of Northeast Forestry University by contact drying with flexible screen. The influence factors considered included temperature, initial moisture contents (IMC), and veneer thickness. Veneer-drying laws under different hot press conditions were analyzed. The results showed that the drying rate increased with temperature rising. 160°C was considered to be more efficient than 140°C and 180°C because excessive high temperature has no significant contribution to drying rate. IMC had significant effect on drying rate. The veneer with high IMC had a higher drying rate at above fiber saturation point (FSP) and a lower drying rate at below FSP, compared to the veneer with low IMC. Average drying rate also varied with thickness in power law.展开更多
AIM：To compare the results of non-mydriatic ultra-wide field imaging system,mydriatic slit-lamp lens（Volk＋90 D） and mydriatic Goldmann three-mirror contact lens examinations in screening fundus lesions among patie...AIM：To compare the results of non-mydriatic ultra-wide field imaging system,mydriatic slit-lamp lens（Volk＋90 D） and mydriatic Goldmann three-mirror contact lens examinations in screening fundus lesions among patients after cataract surgery.METHODS：Non-mydriatic images were obtained with an Optomap panoramic 200Tx（Optomap 200Tx） 3d after surgery and graded by a blinded ophthalmologist.A mydriatic slit-lamp lens examination was performed by another blinded retinal specialist on the same day.A third blinded retinal specialist examined patients two weeks after surgery using a Goldmann three-mirror contact lens.RESULTS：In total,160 patients（184 eyes） were examined,and 66,69,and 75 cases of retinal lesion（s）were identified using the Optomap 200 Tx,slit-lamp lens,and Goldmann three-mirror contact lens,respectively.In13 cases,fundus changes were sight-threatening.The results obtained by Optomap 200 Tx examination and by mydriatic slit-lamp lens examination have good consistency（P =0.375,Kappa =0.942）.The mydriatic Goldmann three-mirror lens examination revealed more fundus lesions but are consistent with Optomap 200Tx（P=0.004,Kappa =0.897） and mydriatic slit-lamp lens examination（P=0.031,Kappa=0.932）.CONCLUSION：Early post-operative fundus screening in cataract patients is extremely important and necessary to prevent further vision loss.Wide-field imaging is a feasible and convenient tool for fundus examination that can be used as a primary screening method among patients after cataract surgery.展开更多
目的了解我国肺结核患者家庭密切接触者活动性肺结核检出情况，估算活动性肺结核检出率。方法系统检索中国全文数据库总库（CNKI）、万方数据库（Wanfangdata）、维普数据库（VIP）、中国生物医学文献数据库（CBM），以及3个外文数据库P...目的了解我国肺结核患者家庭密切接触者活动性肺结核检出情况，估算活动性肺结核检出率。方法系统检索中国全文数据库总库（CNKI）、万方数据库（Wanfangdata）、维普数据库（VIP）、中国生物医学文献数据库（CBM），以及3个外文数据库PubMed、web of Science和Embase 2005年1月1日至2016年3月31日有关涂阳肺结核患者密切接触者活动性肺结核检出情况，且研究现场为中国大陆地区的相关文献，共检出文献3939篇，最后纳入18篇文献进行分析，依据加强流行病学观察性研究的报告（strengthening the reporting of observational studies in epidemiology，STROBE）声明要求对文献进行质量评价，采用广义倒方差模型的方法估算家庭密切接触者活动性肺结核检出合并率，以及按不同性别、年龄、地区和样本来源进行亚组分析；并进行敏感性分析，评价文献质量对结果的影响。结果18篇文献中，家庭密切接触者筛查数为44495名，共检查出活动性肺结核患者1517例，活动性肺结核检出的合并率为3．58％（95％CI=3．24％-3．96％）；其中〉60岁组的合并率（6．02％）较15-岁组（2．94％）及〈15岁组（2．45％）高，差异具有统计学意义（F=16．58，P=0．001）。结论我国涂阳肺结核家庭密切接触者活动性肺结核检出率较高，疫情不容忽视，需要加大对肺结核家庭密切接触者的筛查力度，同时做好家庭密切接触者的结核病防治宣传教育工作，提高对结核病的防范意识。展开更多
文摘Three types of material as platen in contact drying process were tested in Composition Board Laboratory of Northeast Forestry University in 1998. Poplar veneers were dried under’0.3 MPa at 160℃ or 180℃. Through comparison a non-metal flexible material was chosen as screen for designing contact dryer and replacing curved metal plate. The new type contact dryer solved the problem of long auxiliary time by loading wet veneers into press and unloading dried veneers out of press at the same time. This increased productivity. Veneer’s moisture content(MC) varied with drying time in index law. The process of contact drying with non-metal flexible screen was analyzed by stages of preheating, high-speed drying, retarded drying and extremely slow drying.
文摘The moisture contents (MC) of popular veneers were tested in Composition Board Laboratory of Northeast Forestry University by contact drying with flexible screen. The influence factors considered included temperature, initial moisture contents (IMC), and veneer thickness. Veneer-drying laws under different hot press conditions were analyzed. The results showed that the drying rate increased with temperature rising. 160°C was considered to be more efficient than 140°C and 180°C because excessive high temperature has no significant contribution to drying rate. IMC had significant effect on drying rate. The veneer with high IMC had a higher drying rate at above fiber saturation point (FSP) and a lower drying rate at below FSP, compared to the veneer with low IMC. Average drying rate also varied with thickness in power law.
基金Supported by the National Natural Science Foundation of China(No.81271045No.81470642)Shanghai Science and Technology Committee(No.15XD1502800)
文摘AIM：To compare the results of non-mydriatic ultra-wide field imaging system,mydriatic slit-lamp lens（Volk＋90 D） and mydriatic Goldmann three-mirror contact lens examinations in screening fundus lesions among patients after cataract surgery.METHODS：Non-mydriatic images were obtained with an Optomap panoramic 200Tx（Optomap 200Tx） 3d after surgery and graded by a blinded ophthalmologist.A mydriatic slit-lamp lens examination was performed by another blinded retinal specialist on the same day.A third blinded retinal specialist examined patients two weeks after surgery using a Goldmann three-mirror contact lens.RESULTS：In total,160 patients（184 eyes） were examined,and 66,69,and 75 cases of retinal lesion（s）were identified using the Optomap 200 Tx,slit-lamp lens,and Goldmann three-mirror contact lens,respectively.In13 cases,fundus changes were sight-threatening.The results obtained by Optomap 200 Tx examination and by mydriatic slit-lamp lens examination have good consistency（P =0.375,Kappa =0.942）.The mydriatic Goldmann three-mirror lens examination revealed more fundus lesions but are consistent with Optomap 200Tx（P=0.004,Kappa =0.897） and mydriatic slit-lamp lens examination（P=0.031,Kappa=0.932）.CONCLUSION：Early post-operative fundus screening in cataract patients is extremely important and necessary to prevent further vision loss.Wide-field imaging is a feasible and convenient tool for fundus examination that can be used as a primary screening method among patients after cataract surgery.
文摘目的了解我国肺结核患者家庭密切接触者活动性肺结核检出情况，估算活动性肺结核检出率。方法系统检索中国全文数据库总库（CNKI）、万方数据库（Wanfangdata）、维普数据库（VIP）、中国生物医学文献数据库（CBM），以及3个外文数据库PubMed、web of Science和Embase 2005年1月1日至2016年3月31日有关涂阳肺结核患者密切接触者活动性肺结核检出情况，且研究现场为中国大陆地区的相关文献，共检出文献3939篇，最后纳入18篇文献进行分析，依据加强流行病学观察性研究的报告（strengthening the reporting of observational studies in epidemiology，STROBE）声明要求对文献进行质量评价，采用广义倒方差模型的方法估算家庭密切接触者活动性肺结核检出合并率，以及按不同性别、年龄、地区和样本来源进行亚组分析；并进行敏感性分析，评价文献质量对结果的影响。结果18篇文献中，家庭密切接触者筛查数为44495名，共检查出活动性肺结核患者1517例，活动性肺结核检出的合并率为3．58％（95％CI=3．24％-3．96％）；其中〉60岁组的合并率（6．02％）较15-岁组（2．94％）及〈15岁组（2．45％）高，差异具有统计学意义（F=16．58，P=0．001）。结论我国涂阳肺结核家庭密切接触者活动性肺结核检出率较高，疫情不容忽视，需要加大对肺结核家庭密切接触者的筛查力度，同时做好家庭密切接触者的结核病防治宣传教育工作，提高对结核病的防范意识。
