海冰密集度是描述海冰特征的重要参数,准确获取海冰密集度对研究全球气候变化具有重要意义。针对北极夏季海冰密集度反演精度较低的问题,本文通过对微波辐射传输模型中的海冰发射率和初始海冰密集度进行优化估算,改善了微波辐射传输模...海冰密集度是描述海冰特征的重要参数,准确获取海冰密集度对研究全球气候变化具有重要意义。针对北极夏季海冰密集度反演精度较低的问题,本文通过对微波辐射传输模型中的海冰发射率和初始海冰密集度进行优化估算,改善了微波辐射传输模型对夏季观测亮温的大气校正效果,从而优化被动微波海冰密集度的反演结果,本研究采用2019年6—9月的FY-3D/MWRI亮温数据,分别利用优化前和优化后的ASI2算法(ASI2和ASI2E),结合固定系点(FTP)与动态系点(DTP),分别获得了4套夏季北极海冰密集度数据(ASI2-FTP、ASI2-DTP、ASI2E-FTP、ASI2E-DTP),并利用14景MODIS影像对结果进行了精度验证。研究结果表明,本研究提出的优化方法可有效提高北极夏季海冰密集度的反演精度,其中该优化方法对基于固定系点的反演改进尤为明显,其优化后的均方根误差(root mean square error,ERMSE)由21.9%减小到15.43%,偏差(bias,|B_(bias)|)由-12.40%下降到-6.01%。4种反演方法中,基于动态系点的算法优化后(ASI2E-DTP)表现尤为明显,其E_(RMSE)和B_(bias)分别为14.33%和-4.53%。展开更多
A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI 38) cDNA library with yeast two hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of...A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI 38) cDNA library with yeast two hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of 1.8 kb and 2.7 kb in various human tissues at differential level. Putative ASYIP protein contains two large high hydrophobic regions, two protein kinase C phosphorylation sites and two casein kinase Ⅱ phosphorylation sites. A endoplasmic reticulum retrieval signal (Lys Lys Lys Ala Glu) is present at the C terminal of ASYIP protein. Interaction of ASYIP and ASY in mammalian cell was further identified by co immunoprecipitation assay. Like asy gene, overexpression of asyip gene can inhibit growth of tumor cell Saos 2 and induce cell apoptosis, but the efficiency is lower than that of asy gene.展开更多
A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI-38) cDNA library with yeast two-hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of...A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI-38) cDNA library with yeast two-hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of 1.8 kb and 2.7 kb in various human tissues at differential level. Putative ASYIP protein contains two large high hydrophobic regions, two protein kinase C phosphorylation sites and two casein kinase I phosphorylation sites. A endoplasmic reticulum retrieval signal (Lys-Lys-Lys-Ala-Glu) is present at the C-terminal of ASYIP protein. Interaction of ASYIP and ASY in mammalian cell was further identified by co-immunoprecipitation assay. Like asy gene, overexpression of asyip gene can inhibit growth of tumor cell Saos-2 and induce cell apoptosis, but the efficiency is lower than that of asy gene.展开更多
为推动夏玉米科学施肥,在河南省砂壤、中壤和黏壤质潮土上采用田间试验研究了Nutrient Expert(NE)和Agro Services International Inc(ASI)法推荐施肥对夏玉米产量和经济效益的影响及基于NE推荐施肥的氮磷钾肥利用效率。结果表明,各推...为推动夏玉米科学施肥,在河南省砂壤、中壤和黏壤质潮土上采用田间试验研究了Nutrient Expert(NE)和Agro Services International Inc(ASI)法推荐施肥对夏玉米产量和经济效益的影响及基于NE推荐施肥的氮磷钾肥利用效率。结果表明,各推荐施肥处理夏玉米产量、纯收益和蛋白质产量均表现为黏壤>中壤>砂壤,NE推荐施肥处理的产投比最高,其次是ASI推荐施肥处理,推荐施肥可显著增加夏玉米植株养分积累量,促进籽粒产量和蛋白质产量的提高。在砂壤、中壤和黏壤上的NE推荐施肥处理比农民习惯施肥处理分别增产7.22%、3.84%和11.32%,ASI推荐施肥分别增产13.44%、10.60%和11.20%。NE推荐施肥处理中施氮对夏玉米的增产效应最大,氮肥农学效率和氮磷钾肥利用率均表现为黏壤>中壤>砂壤,磷、钾肥农学效率均表现为砂壤>黏壤>中壤,3种质地潮土的肥料农学效率均表现为磷肥>钾肥>氮肥。由此得出,NE推荐施肥适宜在黏壤质潮土推行,而ASI法推荐施肥适宜于砂壤和中壤质潮土。展开更多
文摘海冰密集度是描述海冰特征的重要参数,准确获取海冰密集度对研究全球气候变化具有重要意义。针对北极夏季海冰密集度反演精度较低的问题,本文通过对微波辐射传输模型中的海冰发射率和初始海冰密集度进行优化估算,改善了微波辐射传输模型对夏季观测亮温的大气校正效果,从而优化被动微波海冰密集度的反演结果,本研究采用2019年6—9月的FY-3D/MWRI亮温数据,分别利用优化前和优化后的ASI2算法(ASI2和ASI2E),结合固定系点(FTP)与动态系点(DTP),分别获得了4套夏季北极海冰密集度数据(ASI2-FTP、ASI2-DTP、ASI2E-FTP、ASI2E-DTP),并利用14景MODIS影像对结果进行了精度验证。研究结果表明,本研究提出的优化方法可有效提高北极夏季海冰密集度的反演精度,其中该优化方法对基于固定系点的反演改进尤为明显,其优化后的均方根误差(root mean square error,ERMSE)由21.9%减小到15.43%,偏差(bias,|B_(bias)|)由-12.40%下降到-6.01%。4种反演方法中,基于动态系点的算法优化后(ASI2E-DTP)表现尤为明显,其E_(RMSE)和B_(bias)分别为14.33%和-4.53%。
文摘A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI 38) cDNA library with yeast two hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of 1.8 kb and 2.7 kb in various human tissues at differential level. Putative ASYIP protein contains two large high hydrophobic regions, two protein kinase C phosphorylation sites and two casein kinase Ⅱ phosphorylation sites. A endoplasmic reticulum retrieval signal (Lys Lys Lys Ala Glu) is present at the C terminal of ASYIP protein. Interaction of ASYIP and ASY in mammalian cell was further identified by co immunoprecipitation assay. Like asy gene, overexpression of asyip gene can inhibit growth of tumor cell Saos 2 and induce cell apoptosis, but the efficiency is lower than that of asy gene.
文摘A novel asy interacting protein gene (asyip) was isolated from human lung cell line(WI-38) cDNA library with yeast two-hybrid system. The asyip gene is constitutively expressed as two mRNA transcripts with the size of 1.8 kb and 2.7 kb in various human tissues at differential level. Putative ASYIP protein contains two large high hydrophobic regions, two protein kinase C phosphorylation sites and two casein kinase I phosphorylation sites. A endoplasmic reticulum retrieval signal (Lys-Lys-Lys-Ala-Glu) is present at the C-terminal of ASYIP protein. Interaction of ASYIP and ASY in mammalian cell was further identified by co-immunoprecipitation assay. Like asy gene, overexpression of asyip gene can inhibit growth of tumor cell Saos-2 and induce cell apoptosis, but the efficiency is lower than that of asy gene.
文摘为推动夏玉米科学施肥,在河南省砂壤、中壤和黏壤质潮土上采用田间试验研究了Nutrient Expert(NE)和Agro Services International Inc(ASI)法推荐施肥对夏玉米产量和经济效益的影响及基于NE推荐施肥的氮磷钾肥利用效率。结果表明,各推荐施肥处理夏玉米产量、纯收益和蛋白质产量均表现为黏壤>中壤>砂壤,NE推荐施肥处理的产投比最高,其次是ASI推荐施肥处理,推荐施肥可显著增加夏玉米植株养分积累量,促进籽粒产量和蛋白质产量的提高。在砂壤、中壤和黏壤上的NE推荐施肥处理比农民习惯施肥处理分别增产7.22%、3.84%和11.32%,ASI推荐施肥分别增产13.44%、10.60%和11.20%。NE推荐施肥处理中施氮对夏玉米的增产效应最大,氮肥农学效率和氮磷钾肥利用率均表现为黏壤>中壤>砂壤,磷、钾肥农学效率均表现为砂壤>黏壤>中壤,3种质地潮土的肥料农学效率均表现为磷肥>钾肥>氮肥。由此得出,NE推荐施肥适宜在黏壤质潮土推行,而ASI法推荐施肥适宜于砂壤和中壤质潮土。
