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水稻叶龄增长动态的模拟与叶龄预测 被引量:8
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作者 刘喜珍 郑丽敏 +1 位作者 梁振荣 代春生 《北京农业科学》 2001年第6期11-13,共3页
通过对京郊春稻和麦茬稻品种叶龄进程的田间观测 ,利用水稻叶片出生与温度之间的密切关系 ,开展了水稻叶龄增长模拟试验 ,讨论了模拟结果的可用性 。
关键词 水稻 叶龄模拟模型 叶龄预测
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玉米制种花期不遇的原因及预测方法研究 被引量:8
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作者 孙小文 孙敬华 王立新 《中国农学通报》 CSCD 2004年第6期143-144,209,共3页
根据玉米杂交制种科研实践,研究分析了玉米杂交制种过程中诸多导致花期不遇的因素,针对性的提出了叶龄预测法和可见叶、未出叶、幼雄穗分化观察法等花期预测的有效方法,对指导玉米制种生产和提高制种量具有重要意义。
关键词 玉米 杂交制种 花期不遇现象 原因分析 花期预测 叶龄预测 可见叶观察法 未出叶观察法 幼雄穗分化观察法
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Global and Regional Trends and Projections of Infective Endocarditis-Associated Disease Burden and Attributable Risk Factors from 1990 to 2030 被引量:1
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作者 Lijin Lin Yemao Liu +10 位作者 Juanjuan Qin Fang Lei Wenxin Wang Xuewei Huang Weifang Liu Xingyuan Zhang Zhigang She Peng Zhang Xiaojing Zhang Zhaoxia Jin Hongliang Li 《Chinese Medical Sciences Journal》 CAS CSCD 2022年第3期181-194,I0003,共15页
Objective To forecast the future burden and its attributable risk factors of infective endocarditis(IE).Methods We analyzed the disease burden of IE and its risk factors from 1990 to 2019 using the Global Burden of Di... Objective To forecast the future burden and its attributable risk factors of infective endocarditis(IE).Methods We analyzed the disease burden of IE and its risk factors from 1990 to 2019 using the Global Burden of Disease 2019 database and projected the disease burden from 2020 to 2030 using a Bayesian age-period-cohort model.Results By 2030,the incidence of IE will increase uncontrollably on a global scale,with developed countries having the largest number of cases and developing countries experiencing the fastest growth.The affected population will be predominantly males,but the gender gap will narrow.The elderly in high-income countries will bear the greatest burden,with a gradual shift to middle-income countries.The incidence of IE in countries with middle/high-middle social-demographic indicators(SDI) will surpass that of high SDI countries.In China,the incidence rate and the number of IE will reach 18.07 per 100,000 and 451,596 in 2030,respectively.IEassociated deaths and heart failure will continue to impose a significant burden on society,the burden on women will increase and surpass that on men,and the elderly in high-SDI countries will bear the heaviest burden.High systolic blood pressure has become the primary risk factor for IE-related death.Conclusions This study provides comprehensive analyses of the disease burden and risk factors of IE worldwide over the next decade.The IE-associated incidence will increase in the future and the death and heart failure burden will not be appropriately controlled.Gender,age,regional,and country heterogeneity should be taken seriously to facilitate in making effective strategies for lowering the IE disease burden. 展开更多
关键词 infective endocarditis disease burden risk factors Bayesian age-period-cohort model PROJECTION
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