目的比较Alberta卒中项目早期CT评分(Alberta stroke program early CT score,ASPECTS)、DRAGON评分和血管事件患者总体健康风险评分(totaled health risks in vascular events score,THRIVE)对我国行静脉溶栓的急性缺血性卒中(acute is...目的比较Alberta卒中项目早期CT评分(Alberta stroke program early CT score,ASPECTS)、DRAGON评分和血管事件患者总体健康风险评分(totaled health risks in vascular events score,THRIVE)对我国行静脉溶栓的急性缺血性卒中(acute ischemic stroke,AIS)患者3个月不良预后的预测价值.方法回顾性连续收集2012年12月-2017年12月在同济大学附属同济医院神经内科急诊入院行静脉溶栓的AIS患者214例的临床资料,并对患者使用ASPECTS、DRAGON和THRIVE量表进行评分.以卒中后3个月临床预后为观察终点,不良预后定义为mRS评分≥3分.应用受试者工作特征(receiver operating characteristic,ROC)曲线分析各评分对3个月不良预后的预测价值,ROC曲线下面积采用C值表示,通过C值比较3个评分的预测价值;应用Hosmer-Lemeshow(H-L)拟合优度[χ2(P)]检验评价各模型与实际结果的拟合度;应用Spearman相关分析评估实际与预期结局事件的关联程度.结果最终纳入207例患者,有58例(28%)预后不良.ROC曲线分析,ASPECTS、DRAGON和THRIVE评分对应C值在总体患者分别为0.825、0.800、0.765,在前循环分别为0.850、0.817、0.797,在男性组分别为0.764、0.736、0.697,在女性组分别为0.909、0.878、0.861(均P﹤0.05).对ASPECTS、DRAGON和THRIVE评分进行H-L拟合优度检验,各评分对应χ2(P)值在总体患者分别为4.865、6.758、7.836,在前循环分别为3.932、6.060、4.328,在男性组分别为7.021、6.631、4.647,在女性组分别为2.493、2.972、10.788(均P>0.05).对ASPECTS、DRAGON和THRIVE评分进行Spearman相关分析,各评分对应r值在总体患者分别为-0.532、0.473、0.418,在前循环分别为-0.572、0.501、0.471,在男性组分别为-0.427、0.359、0.300,在女性组分别为-0.688、0.626、0.601(均P﹤0.05).结论ASPECTS、DRAGON和THRIVE评分模型都能预测静脉溶栓治疗的AIS患者3个月不良预后风险,其中ASPECTS评分预测诊断价值最高.展开更多
The exploitation of coal resources inevitably affects, to different degrees, arable land resources and impacts the socio-economic development in mining areas. Therefore it is of great practical importance to probe the...The exploitation of coal resources inevitably affects, to different degrees, arable land resources and impacts the socio-economic development in mining areas. Therefore it is of great practical importance to probe the rules of the effect from coal resource exploration on arable land. Suitable and effective measures to compensate for damaged to and loss of arable land resources should be taken on the basis of carrying out green mining and reducing damage to limited arable land resources. We have used GIS in simulating the effect of coal resource exploration on arable land. In light of our simulation of the space-time spectrum, the effect is analyzed. Given the socio-economic development conditions of a mining area, specified rational amounts and opportunities for compensation to arable land in mining areas are explored. Finally, from a policy perspective, relevant proposals for rational arable land resource compensation are proposed to facilitate the coordinated development between coal resource exploitation and socio-economy development in mining areas.展开更多
目的研究广东省城市居民健康相关因素的分布情况,为进一步揭示广东省城市居民慢性非传染性疾病的流行特征及发病规律奠定基础。方法2018年3月1日―2019年10月30日在广东省广州市、东莞市及深圳市开展基线调查,包括问卷调查、体格检查、...目的研究广东省城市居民健康相关因素的分布情况,为进一步揭示广东省城市居民慢性非传染性疾病的流行特征及发病规律奠定基础。方法2018年3月1日―2019年10月30日在广东省广州市、东莞市及深圳市开展基线调查,包括问卷调查、体格检查、生物样本采集和实验室检测,建立了包含34764名30~84岁研究对象的基线数据库和生物样本库。结果34764名调查对象的年龄为(53.31±12.61)岁,男性占41.1%。调查对象目前吸烟率男性为34.4%,女性0.4%;有饮酒习惯的男性比例为16.7%,女性为1.9%;BMI≥24 kg/m2的男性占54.4%,女性占44.4%;男性腰围≥90 cm的比例为35.8%,女性腰围≥85 cm的比例为34.0%;调查时男性血压超过正常范围(SBP≥140 mm Hg或DBP≥90 mm Hg)的比例为34.8%,女性的比例为28.8%。结论广东省城市居民中饮食、吸烟、饮酒及肥胖等慢性非传染性疾病相关因素在不同性别和年龄人群中存在不同的分布特征。展开更多
An improved Euclidean geometry approach to design quasi-cyclic （QC） Low-density parity-check （LDPC） codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower er...An improved Euclidean geometry approach to design quasi-cyclic （QC） Low-density parity-check （LDPC） codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower error floor than the original codes. The distribution of the minimum weight codeword is analyzed, and a sufficient existence condition of the minimum weight codeword is found. Simulations show that a lot of QC-LDPC codes with lower error floor can be designed by reducing the number of the minimum weight codewords satisfying this sufficient condition.展开更多
文摘目的比较Alberta卒中项目早期CT评分(Alberta stroke program early CT score,ASPECTS)、DRAGON评分和血管事件患者总体健康风险评分(totaled health risks in vascular events score,THRIVE)对我国行静脉溶栓的急性缺血性卒中(acute ischemic stroke,AIS)患者3个月不良预后的预测价值.方法回顾性连续收集2012年12月-2017年12月在同济大学附属同济医院神经内科急诊入院行静脉溶栓的AIS患者214例的临床资料,并对患者使用ASPECTS、DRAGON和THRIVE量表进行评分.以卒中后3个月临床预后为观察终点,不良预后定义为mRS评分≥3分.应用受试者工作特征(receiver operating characteristic,ROC)曲线分析各评分对3个月不良预后的预测价值,ROC曲线下面积采用C值表示,通过C值比较3个评分的预测价值;应用Hosmer-Lemeshow(H-L)拟合优度[χ2(P)]检验评价各模型与实际结果的拟合度;应用Spearman相关分析评估实际与预期结局事件的关联程度.结果最终纳入207例患者,有58例(28%)预后不良.ROC曲线分析,ASPECTS、DRAGON和THRIVE评分对应C值在总体患者分别为0.825、0.800、0.765,在前循环分别为0.850、0.817、0.797,在男性组分别为0.764、0.736、0.697,在女性组分别为0.909、0.878、0.861(均P﹤0.05).对ASPECTS、DRAGON和THRIVE评分进行H-L拟合优度检验,各评分对应χ2(P)值在总体患者分别为4.865、6.758、7.836,在前循环分别为3.932、6.060、4.328,在男性组分别为7.021、6.631、4.647,在女性组分别为2.493、2.972、10.788(均P>0.05).对ASPECTS、DRAGON和THRIVE评分进行Spearman相关分析,各评分对应r值在总体患者分别为-0.532、0.473、0.418,在前循环分别为-0.572、0.501、0.471,在男性组分别为-0.427、0.359、0.300,在女性组分别为-0.688、0.626、0.601(均P﹤0.05).结论ASPECTS、DRAGON和THRIVE评分模型都能预测静脉溶栓治疗的AIS患者3个月不良预后风险,其中ASPECTS评分预测诊断价值最高.
基金Project 50774080 supported by the National Natural Science Foundation of China
文摘The exploitation of coal resources inevitably affects, to different degrees, arable land resources and impacts the socio-economic development in mining areas. Therefore it is of great practical importance to probe the rules of the effect from coal resource exploration on arable land. Suitable and effective measures to compensate for damaged to and loss of arable land resources should be taken on the basis of carrying out green mining and reducing damage to limited arable land resources. We have used GIS in simulating the effect of coal resource exploration on arable land. In light of our simulation of the space-time spectrum, the effect is analyzed. Given the socio-economic development conditions of a mining area, specified rational amounts and opportunities for compensation to arable land in mining areas are explored. Finally, from a policy perspective, relevant proposals for rational arable land resource compensation are proposed to facilitate the coordinated development between coal resource exploitation and socio-economy development in mining areas.
文摘目的研究广东省城市居民健康相关因素的分布情况,为进一步揭示广东省城市居民慢性非传染性疾病的流行特征及发病规律奠定基础。方法2018年3月1日―2019年10月30日在广东省广州市、东莞市及深圳市开展基线调查,包括问卷调查、体格检查、生物样本采集和实验室检测,建立了包含34764名30~84岁研究对象的基线数据库和生物样本库。结果34764名调查对象的年龄为(53.31±12.61)岁,男性占41.1%。调查对象目前吸烟率男性为34.4%,女性0.4%;有饮酒习惯的男性比例为16.7%,女性为1.9%;BMI≥24 kg/m2的男性占54.4%,女性占44.4%;男性腰围≥90 cm的比例为35.8%,女性腰围≥85 cm的比例为34.0%;调查时男性血压超过正常范围(SBP≥140 mm Hg或DBP≥90 mm Hg)的比例为34.8%,女性的比例为28.8%。结论广东省城市居民中饮食、吸烟、饮酒及肥胖等慢性非传染性疾病相关因素在不同性别和年龄人群中存在不同的分布特征。
基金supported by the Scientific Research Program Funded by Shaanxi Provincial Education Department (11JK1007)the Program for Young Teachers in Xi’an University of Posts and Telecommunications (0001286)the National Basic Research Program of China (2012CB328300)
文摘An improved Euclidean geometry approach to design quasi-cyclic （QC） Low-density parity-check （LDPC） codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower error floor than the original codes. The distribution of the minimum weight codeword is analyzed, and a sufficient existence condition of the minimum weight codeword is found. Simulations show that a lot of QC-LDPC codes with lower error floor can be designed by reducing the number of the minimum weight codewords satisfying this sufficient condition.
