目的:调查亚洲国家和地区1990—2020年HIV-1毒株基因型流行分布特征，为疫苗研发提供参考。方法:整理HIV sequence database中1990—......

Environmental efficiency has been a research interest in the field of energy since the 1973 world oil crisis.With the in......

Asparagus stem blight is a worldwide devastating disease.To identify accurately its pathogen and to make it clear the di......

Objectives: To investigate the epidemiological features of proximal humeral fractures in China and to illustrate the reg......

Objective: The aim of the study was to observe the characteristic of permeation of capsaicin across jejunum, ileum and c......

本文利用DEA（数据包络分析法）对战略性新兴产业2010-2011 两年的总体经营 效率、2011 年战略性新兴产业七大产业及我国中、东、西部......

研究目的:依据威廉姆森交易费用经济学理论分析江苏省"万顷良田建设工程"试点地区宅基地置换模式区域差异的原因.研究方法:交易......

按比例安排残疾人就业是解决残疾人就业问题的重要途径。本文利用统计分析方 法中的聚类分析方法对我国按比例安排残疾人就业的区......

Study on the regional characteristics of soil organic carbon (SOC) density in farmland will not only contribute greatly ......