[Service system models for adolescent mental health in different institutional contexts and their implications for China]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanWang Y, Yan L, Lin Z, Xiao Y, Jiang W.
europepmc +1 more source
广西民族大学2008年硕士研究生入学考试初试自命题科目试题：数学分析
, 2008 广西民族大学2008年硕士研究生入学考试初试自命题科目试题：数学分析;试卷代号：A卷;适用学科专业：基础数学、计算数学 ...
广西民族大学
core
[Analysis of the clustering of <i>Streptococcus pneumoniae</i> carriage and its influencing factors among school children aged 6-10 years in Haidong City of Qinghai Province]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiLiu XQ +6 more
europepmc +1 more source
广西民族大学2010年硕士研究生入学考试初试自命题科目试题：数学分析
, 2010 广西民族大学2010年硕士研究生入学考试初试自命题科目试题：数学分析;试卷代号：A卷 ;适用学科专业：基础数学、计算数学 ...
广西民族大学
core
[Development and validation of a comprehensive evaluation index system for preconception health behaviors in reproduc-tive-aged populations]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanSun R, Wang H, Xu X, Li L.
europepmc +1 more source
Regional Rainfall Forecast Based on Principal Component Analysis and Support Vector Machine
, 2009 将主成分分析和支持向量机回归相结合,以广西5、6月区域平均日降水量作为预报对象,进行区域日降水量预测研究.首先,整理分析大量的T213数值预报产品信息数据进行主成分分析,得到主成分数据序列;其次,根据主成分数据序列建立训练集训练支持向量机,并利用遗传算法优化参数;最后,输入支持向量机所需数据,得到主成分预测结果,建立广西日降水预报模型.实例计算结果表明,支持向量机回归模型比逐步回归模型有更好的预测能力.A scheme to forecast Regional Mean Rainfall is ...
农吉夫
core
[Evolution and influencing factors of disease burden of depres-sive disorders and depressive levels among Chinese adolescents]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanZeng J +5 more
europepmc +1 more source
Shuitu Baochi Xuebao[目的] 为探究东北黑土区防风林带走向与主害风向的关系。[方法] 利用遥感解译和野外调查,获取研究区内林带基本特征数据,结合研究区内43个气象站点风速风向数据,对林带走向与主害风向的交角,即风向偏角进行计算分析。[结果] 蒙东黑土亚区偏西风占比大,风向较为集中,主害风主导性强烈,松嫩黑土亚区风向较为分散,主害风主导性较弱;平均林带密度松嫩黑土亚区＞蒙东黑土亚区;防风林带走向在松嫩黑土亚区占比最大的为N-S走向林带,蒙东黑土亚区没有明显的规律性;研究区内风向偏角＜30°占比为29.60%,＞30 ...
马逸雪 +4 more
doaj
[Regional distribution differences and influencing factors of primary healthcare institutions in China]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanNi P, Wang J, Shi L, Xu L.
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