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An integrated method of selecting environmental covariates for predictive soil depth mapping

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Journal of Integrative Agriculture 2019年第2期18卷 301-315页

作者： LU Yuan-yuan LIU Feng ZHAO Yu-guo song xiao-dong ZHANG Gan-lin State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Environmental covariates are the basis of predictive soil *** selection determines the performance of soil mapping to a great extent,especially in cases where the number of soil samples is limited but soil spatial heterogeneity is *** this study,we proposed an integrated method to select environmental covariates for predictive soil depth ***,candidate variables that may influence the development of soil depth were selected based on pedogenetic ***,three conventional methods(Pearson correlation analysis(PsCA),generalized additive models(GAMs),and Random Forest(RF))were used to generate optimal combinations of environmental ***,three optimal combinations were integrated to produce a final combination based on the importance and occurrence frequency of each environmental *** tested this method for soil depth mapping in the upper reaches of the Heihe River Basin in Northwest China.A total of 129 soil sampling sites were collected using a representative sampling strategy,and RF and support vector machine(SVM)models were used to map soil *** results showed that compared to the set of environmental covariates selected by the three conventional selection methods,the set of environmental covariates selected by the proposed method achieved higher mapping *** combination from the proposed method obtained a root mean square error(RMSE)of 11.88 cm,which was 2.25–7.64 cm lower than the other methods,and an R^2 value of 0.76,which was 0.08–0.26 higher than the other *** results suggest that our method can be used as an alternative to the conventional methods for soil depth mapping and may also be effective for mapping other soil properties.

关键词： environmental covariate selection integrated method predictive soil mapping soil depth

Atrial natriuretic peptide gene polymorphism is not associated with hypertrophic cardiomyopathy

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Chinese Medical Journal 2010年第2期123卷 188-192页

作者： XUE Hao WANG Hu WANG xiao-jian SUN Kai WANG Shu-xia song xiao-dong HUI Ru-tai Department of Cardiology Chinese People's Liberation Army General Hospital Beijing 100853 China Sino-Gerrnan Laboratory for Molecular Medicine Key Laboratory for Clinical Cardiovascular Genetics Ministry of Education Fuwai Cardiovascular Hospital and Cardiovascular Institute Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100037 China

Background Hypertrophic cardiomyopathy （HCM） is a primary autosomal dominant inheritant myocardial disease with heterogeneity in clinical manifestations, natural history and prognosis. Even carrying an identical gene mutation among family members, a va[iety of clinical phenotypes have been found in patients with HCM. Modifier genes may contribute to the diversity. The plasma levels of atrial natriuretic peptides （ANP） were found previously to be elevated in HCM. Our studies suggested that ANP gene promoter polymorphism is associated with left ventricular hypertrophy in hypertension. The present study aimed to determine whether the two SNPs in the ANP gene are associated with HCM Methods We determined the relationships between the ANP gene polymorphism and HCM in 262 HCM patients and 614 age- and sex-matched healthy individuals. All of the subjects were genotyped for -A2843G and A188G polymorphisms. Results The genotype frequency in the -A2843G and A188G polymorphisms of the ANP gene was not significantly different between the HCM patients and controls. The -A2843G and A188G polymorphisms were also not associated with clinical phenotype in cardiomyopathy patients. Conclusions The polymorphisms of the ANP gene are not associated with increasing risk of HCM or clinical phenotypes. The variations of the ANP gene may not serve as a genetic modifier for the development of HCM.

关键词： atrial natriuretic peptides polymorphism hypertrophic cardiomyopathy

Ghrelin receptor gene polymorphisms are associated with female metabolic syndrome in Chinese population

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Chinese Medical Journal 2008年第17期121卷 1666-1669页

作者： LI Wei-ju ZHEN Yi-song SUN Kai XUE Hao song xiao-dong WANG Yi-bo FAN xiao-han HAN Yun-feng HUI Ru-tai Hypertension Division Fuwai Hospital and Cardiovascular Institute Key Laboratory of Clinical Cardiovascular Genetics Ministry of Education Sino-German Laboratory for Molecular Medicine

Background The ghrelin plays an important role in the regulation of food intake and energy homeostasis. Therefore, the ghrelin receptor gene （GHSR） is an excellent candidate for studying metabolic syndrome. This study aimed to investigate whether polymorphisms in ghrelin receptor gene are associated with metabolic syndrome in Chinese population. Methods Subjects consisted of 698 patients aged 41 to 80 years, diagnosed as metabolic syndrome by International Diabetes Federation （IDF） 2005 criteria, and 762 age- and gender-matched controls. Three variants within the GHSR were selected and genotyped using polymerase chain reaction （PCR） and restriction fragment length polymorphism （RFLP）. Odds ratios were estimated using a case-control study design by controlling confounding factors. Results The NA genotype （rs2922126） in the promoter was associated with metabolic syndrome （OR 1.41, 95%C/ 1.03-1.94）, increased waist circumference （OR 1.75, 95%C/1.26-2.42）, and increased fast blood glucose （OR 1.49, 95%CI 1.07-2.06） in women. The NA genotype （rs509030） in the intron was associated with lower plasma high density lipoprotein in women （OR 1.37, 95%C/1.02-1.84）. Conclusion The polymorphisms within GHSR might be a genetic risk factor for metabolic syndrome in women.

关键词： metabolic syndrome polymorphism ghrelin receptor

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英国工人阶级与第二次议会改革

史学集刊 2016年第5期 73-80页

作者：宋晓东石河子大学历史系新疆石河子832000

英国的民主制度确立于19世纪,在现代民主制度建立的过程中,英国工人阶级发挥了重要作用。在具有重要意义的第二次议会改革运动中,工人阶级由早期现存制度的反抗者变为主动参与者。开始寻求在阶级合作的前提下,通过改革的方法实现现有议... 详细信息

英国的民主制度确立于19世纪,在现代民主制度建立的过程中,英国工人阶级发挥了重要作用。在具有重要意义的第二次议会改革运动中,工人阶级由早期现存制度的反抗者变为主动参与者。开始寻求在阶级合作的前提下,通过改革的方法实现现有议会制度的民主化。工人阶级态度的转变,不仅为英国民主制度的建立奠定了基础,也保证了英国社会的和谐稳定。

关键词：英国工人阶级议会改革

基于频域和时域振动模型的轨道交通桥梁噪声预测对比分析

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振动工程学报 2018年第3期31卷 427-433页

作者：宋晓东石宇李奇东南大学桥梁与隧道工程系江苏南京210096 同济大学桥梁与隧道工程系上海200092

分别采用基于模态叠加法的时域车辆-轨道-桥梁耦合振动模型和基于移动粗糙度激励的频域耦合振动模型对某U型梁桥的动力响应进行仿真分析,对两种数值方法计算获得的轮轨力和桥梁振动加速度进行对比。然后分别结合2.5维声学边界元和三维... 详细信息

分别采用基于模态叠加法的时域车辆-轨道-桥梁耦合振动模型和基于移动粗糙度激励的频域耦合振动模型对某U型梁桥的动力响应进行仿真分析,对两种数值方法计算获得的轮轨力和桥梁振动加速度进行对比。然后分别结合2.5维声学边界元和三维声学边界元对两种振动模型的辐射噪声进行预测,并对比了两种模型获得的桥梁噪声频谱和空间分布规律。研究表明,两种模型获得的轮轨力基本相同,且峰值频率一致;考虑多车轮激励效应的频域振动模型和时域模型获得的桥梁振动加速度频谱较为吻合;基于两种振动模型预测的桥梁噪声频谱和声压空间分布吻合较好。

关键词：噪声预测轨道交通车辆-轨道-桥梁耦合系统辐射噪声

龙门山断裂带周缘重复地震识别及其在台网定位评价中的应用

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地震 2019年第3期39卷 166-177页

作者：孟真宋晓东武汉大学测绘学院湖北武汉430079 伊利诺伊大学香槟分校地质系美国香槟61820

利用国家测震台网数据备份中心时间跨度超过7年的连续波形资料,设定至少三个台站记录的垂直分量波形互相关系数大于0.8的地震对为一组重复地震,通过波形互相关分析,识别出龙门山断裂带周缘波形相关意义上的'重复地震'2790次,构成2907组... 详细信息

利用国家测震台网数据备份中心时间跨度超过7年的连续波形资料,设定至少三个台站记录的垂直分量波形互相关系数大于0.8的地震对为一组重复地震,通过波形互相关分析,识别出龙门山断裂带周缘波形相关意义上的'重复地震'2790次,构成2907组重复地震。沿用Schaff和Richards的研究结果,假定'重复地震'间距很小(小于1 km),地震目录记录的重复地震对位置之差主要为地震台网的定位误差所致,基于此误差给出了龙门山断裂带周缘地震台网的定位精度估计:台网的水平定位精度较高,水平定位误差约为2.8 km(2倍标准差),且西南段台网的水平定位精度优于中北段;垂直定位精度较差,垂直定位误差约为10 km(2倍标准差),现有地震定位方法对震源深度的测定有待改善。

关键词：重复地震波形互相关台网定位精度龙门山断裂带

基于元数据的城市规划信息管理新方法探索——走向规划信息的全面管理

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城市规划学刊 2012年第2期 39-46页

作者：牛强宋小冬同济大学建筑与城市规划学院武汉大学城市设计学院同济大学城市规划系高密度人居环境生态与节能教育部重点实验室

在总结了现行规划信息管理方法存在的问题后,针对规划师希望尽可能全面而快捷地掌握所需规划信息的希求,探索了基于元数据的规划信息管理方法。具体介绍了其基本原理、规划信息的检索查看技术、特别是地理空间检索技术、规划元数据方案... 详细信息

在总结了现行规划信息管理方法存在的问题后,针对规划师希望尽可能全面而快捷地掌握所需规划信息的希求,探索了基于元数据的规划信息管理方法。具体介绍了其基本原理、规划信息的检索查看技术、特别是地理空间检索技术、规划元数据方案、成本控制方案、分布式信息管理方案、信息集成和共享方案。另外,还介绍了该方法在玉环县实践的情况,3年多的实践表明该方法信息管理工作量小、成本低、见效快,符合规划师获取信息的思维习惯,信息更新及时、不受信息格式和信息质量的制约,全面而有效地管理了该县的各类规划信息,验证了该方法的有效性和可行性。

关键词：元数据城市规划信息管理地理空间检索

Variants of tumor necrosis factor-induced protein 3 gene are associated with left ventricular hypertrophy in hypertensive patients

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Chinese Medical Journal 2011年第10期124卷 1498-1503页

作者： XUE Hao WANG Shu-xia WANG xiao-jian XIN Ying WANG Hu song xiao-dong SUN Kai WANG Yi-bo HUI Ru-tai Department of Cardiology Chinese People's Liberation Army General Hospital Beijing 100853 China Sino-German Laboratory for Molecular Medicine Key Laboratory for Clinical Cardiovascular Genetics Ministry of Education Fuwai Cardiovascular Hospital and Cardiovascular Institute Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100037 China

Background Tumor necrosis factor-induced protein 3 （TNFAIP3） gene has been shown important in cardiac remodeling. The aim of the present study was to investigate whether the variants of TNFAIP3 gene are associated with left ventricular hypertrophy （LVH） in hypertensive *** Four representatives of all the other single nucleotide polymorphisms （SNPs） in TNFAIP3 gene were tested for association with hypertrophy in two independent hypertensive populations （n=2120 and n=324）.Results We found that only the tag SNP （rs5029939） was consistently lower in the hypertensives with cardiac hypertrophy than in those without cardiac hypertrophy in the two study populations, indicating a protective effect on LVH （odds ratio （OR）（95% confidence interval （CI））0.58 （0.358-0.863）, P=0.035; OR （95% CI）=0.477 （0.225-0.815）, P〈0.05,respectively）. Multiple regression analyses confirmed that the patients with G allele of rs5029939 had less thickness in inter-ventricular septum, left ventricular posterior wall, relative wall thickness and left ventricular mass index than did those with CC allele in the hypertensive patients in both study populations （all P〈0.01）.Conclusion These findings indicate that the SNP （rs5029939） in the TNFAIP3 gene may serve as a novel protective genetic marker for the development of LVH in patients with hypertension

关键词： tumor necrosis factor induced protein 3 polymorphism left ventricular hypertrophy hypertension

Cardiovascular risk and prevalence of metabolic syndrome by differing criteria

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Chinese Medical Journal 2008年第16期121卷 1532-1536页

作者： LI Wei-ju XUE Hao SUN Kai song xiao-dong WANG Yi-bo ZHEN Yi-song HAN Yun-feng HUI Ru-tai Hypertension Division Fuwai Hospital and Cardiovascular Institute Key Laboratory of Clinical Cardiovascular Genetics Ministry of Education Sino-German Laboratory for Molecular Medicine Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background The prevalence of metabolic syndrome （MetS） in hypertensive population in Chinese countryside is unknown. Firstly, this study compared the prevalence of MetS according to National Cholesterol Education Program （NCEP） ATPIII, revised NCEP and International Diabetes Federation （IDF） definitions. Secondly, it investigated the association between MetS, coronary heart disease （CHD） and stroke in patients with hypertension. Methods In this cross sectional study, the cluster sampling method was used. Three MetS definitions were applied to 1418 normal subjects and 5348 hypertensive patients aged 40-75 years in rural areas in China. The agreement between different MetS definitions was estimated by K statistics. Logistic regression analyses determined the association between MetS defined by the three MetS definitions and CHD and stroke. Results In subjects without hypertension, the prevalence of Mets was 4.1% by NCEP definition, 8.3% revised NCEP definition and 7.8% IDF definition. In hypertensive individuals, the prevalence was 14.0%, 32.9%, and 27.4% in men; 35.6%, 53.1%, and 50.2% in women by the same definitions, respectively. In hypertensive individuals, the agreement was 94.4% in men and 97.0% in women between revised NCEP and IDF definitions. The IDF defined MetS was more strongly associated with CHD than the NCEP or revised NCEP defined MetS （adjusted odds ratio： 1.92 compared with 1.85 and 1.69 in men; 1.64 compared with 1.48 and 1.60 in women）. Conclusions In the patients with hypertension, the revised NCEP and IDF definitions identified more individuals than NCEP definition and their agreement is very high. The IDF defined MetS is more strongly associated with CHD than the NCEP or revised NCEP defined MetS, but weakly or not associated with stroke.

关键词： metabolic syndrome hypertension cardiovascular risk National Cholesterol Education Program,International Diabetes Federation