Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation(10 to 90 day...Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation(10 to 90 days) on insect migration. A case study was conducted to ascertain the influence of low-frequency atmospheric oscillation on the immigration of brown planthopper, Nilaparvata lugens(Stl), in Hunan and Jiangxi provinces. The results showed the following:(1) The number of immigrating N. lugens from April to June of 2007 through 2016 mainly exhibited a periodic oscillation of 10 to 20 days.(2) The 10-20 d low-frequency number of immigrating N. lugens was significantly correlated with a low-frequency wind field and a geopotential height field at 850 h Pa.(3) During the peak phase of immigration, southwest or south winds served as a driving force and carried N. lugens populations northward, and when in the back of the trough and the front of the ridge, the downward airflow created a favorable condition for N. lugens to land in the study area. In conclusion, the northward migration of N. lugens was influenced by a low-frequency atmospheric circulation based on the analysis of dynamics. This study was the first research connecting atmospheric low-frequency oscillation to insect migration.展开更多
One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continu...One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continuous stratified finite depth system. We have also tested the method of measuring the amplitude of IWs from X-Band radar backscatter image sequences acquired on June 2009 in the northeastern South China Sea. The method was applied in several radar images. Experiments show that the retrieval amplitudes are consistent with the in-situ observational amplitudes of IWs by using the towed thermistor chain and conductivity-temperature-depth (CTD) profile. The uncertainty of the method is also discussed.展开更多
基金National Science Foundation of China(41075086,41475106)Science Research Program of Universities and Colleges in Jiangsu Province(14KJA170003)Priority Academic Program Development of Jiangsu Higher Education Institutions(IRT1147)
文摘Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation(10 to 90 days) on insect migration. A case study was conducted to ascertain the influence of low-frequency atmospheric oscillation on the immigration of brown planthopper, Nilaparvata lugens(Stl), in Hunan and Jiangxi provinces. The results showed the following:(1) The number of immigrating N. lugens from April to June of 2007 through 2016 mainly exhibited a periodic oscillation of 10 to 20 days.(2) The 10-20 d low-frequency number of immigrating N. lugens was significantly correlated with a low-frequency wind field and a geopotential height field at 850 h Pa.(3) During the peak phase of immigration, southwest or south winds served as a driving force and carried N. lugens populations northward, and when in the back of the trough and the front of the ridge, the downward airflow created a favorable condition for N. lugens to land in the study area. In conclusion, the northward migration of N. lugens was influenced by a low-frequency atmospheric circulation based on the analysis of dynamics. This study was the first research connecting atmospheric low-frequency oscillation to insect migration.
文摘目的探讨不同频次的青藤碱注射治疗膝骨关节炎的疗效。方法选取陕西中医药大学第二附属医院2021年11月-2022年1月诊治的60例膝骨关节炎患者,随机分为每日组和隔日组,每组30例。每日组给予青藤碱35 mg关节腔内注射,每日1次,共10次;隔日组给予青藤碱35 mg关节腔内注射,每2 d 1次,共5次。观察2组治疗前后西安大略和麦克马斯特大学骨关节炎指数评分(WOMAC)、疼痛视觉模拟评分法(VAS)评分和血清中白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)水平变化,记录2组不良反应发生情况。结果治疗后,2组患者WOMAC评分、VAS评分及血清中IL-1β和TNF-α水平均较治疗前显著降低(P均<0.05),每日组的WOMAC评分、VAS评分与隔日组比较差异均无统计学意义(P均>0.05),但每日组血清IL-1β和TNF-α水平显著低于隔日组(P均<0.05)。2组均无明显不良反应发生。结论不同频次的青藤碱注射治疗膝骨关节炎均能改善患者的症状并降低血清炎性因子水平,但每日注射下调血清炎性因子水平作用更显著。临床中可根据患者具体情况选取更为合适的治疗方法。
基金Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX-YW-12-04)the National Natural Science Foundation of China (No. 41030855)+1 种基金the National High Technology Research and Development Program of China (863 Program) (No. 2008AA09A403)the Marine Public Welfare Project of China (No. 201105032)
文摘One of the most important parameters for oceanic internal waves (IWs) is their amplitude. We have developed a method to retrieve the IW amplitude from nautical X-Band radar images based on the KdV equation for continuous stratified finite depth system. We have also tested the method of measuring the amplitude of IWs from X-Band radar backscatter image sequences acquired on June 2009 in the northeastern South China Sea. The method was applied in several radar images. Experiments show that the retrieval amplitudes are consistent with the in-situ observational amplitudes of IWs by using the towed thermistor chain and conductivity-temperature-depth (CTD) profile. The uncertainty of the method is also discussed.
