简介:Liquid-solid(L-S)masstransfercoefficients(Ks)werecharacterizedinagas-liquid-solid(G-L-S)three-phasecountercurrentmagneticallystabilizedbed(MSB)usingamorphousalloySRNA-4asthesolidphase.Effectsofsuperficialliquidvelocity,superficialgasvelocity,magneticfieldstrength,liquidviscosityandsurfacetensionwereinvestigated.ExperimentalresultsindicatedthattheexternalmagneticfieldincreasedKsinthree-phaseMSB,ascomparedtothoseinconventionalG-L-Sfluidizedbeds;thatKsincreasedwithmagneticfieldstrength,superficialgasandliquidvelocitiesanddecreasedwithliquidviscosityandsurfacetension;andthatKsshoweduniformaxialandradialdistributionsexceptforsmallincreasesclosetothewall.DimensionlesscorrelationswereestablishedtoestimateKsoftheG-L-ScountercurrentMSBusingSRNA-4catalyst,withanaverageerrorof3.6%.
简介:摘要目的探讨非小细胞肺癌L861Q突变临床特征,与L858R突变临床特征对比研究,分析二者突变临床特征差异及临床价值。方法纳入2012年7月至2018年12月在空军军医大学第二附属医院呼吸与危重症医学科基因检测中心行EGFR基因检测的705例非小细胞肺癌患者,回顾性分析L861Q、L858R突变临床特征及二者突变临床特征相对比。结果13例L861Q突变均发生于腺癌未合并其他肿瘤组,L861Q腺癌突变率高于其他类型(P=0.004)。L858R突变特征表现为:女性组突变率高于男性组(χ2=19.562,P<0.001)、不吸烟组突变率高于吸烟组(χ2=15.859,P<0.001)、右肺肿瘤突变率高于左肺肿瘤(χ2=5.601,P=0.020)、腺癌组突变率高于其他组(χ2=16.282,P<0.001)、Ⅳ期组肿瘤突变率高于Ⅰ~Ⅲ期组(χ2=5.996,P=0.016)。L861Q与L858R女性组突变率高于男性组,年龄≥50岁组突变率高于年龄<50岁组,未合并其他肿瘤组突变率高于合并组,并发骨转移组突变率高于无转移组,二者突变临床特征差异无统计学意义(P值均>0.05)。L861Q与L858R突变临床特征在有无合并糖尿病、高血压和是否并发胸膜、淋巴结、头颅转移及临床分期组恰相反,差异均无统计学意义(P值均>0.05)。结论L861Q突变以腺癌多见,L858R突变以非吸烟、女性、右肺、Ⅳ期、腺癌多见。L861Q与L858R突变在性别、年龄、是否吸烟、病理分型、肿瘤发生部位、是否合并其他肿瘤、有无并发骨转移突变临床特征相一致;在肿瘤分期,是否并发胸膜、淋巴结、头颅转移及有无合并糖尿病、高血压突变临床特征相反。
简介:将初始体质量(0.42±0.05)g的杂交鲟(Acipenserschrenckii♀×A.baerii♂)仔鱼饲养在室内循环水养殖系统中,投喂添加0(G1)、0.25%(G2)、0.5%(G3)、0.75%(G4)和1.0%(G5)L-丙氨酰-L-谷氨酰胺(L-AG)的5种等氮饲料,每个处理3个重复,每个重复1500尾鱼,研究L-AG水平对杂交鲟体成分和十二指肠形态的影响。56d的养殖结果表明:饲料中添加0.25%和5.0%L-AG对全鱼粗蛋白含量影响不显著(P〉0.05),但添加0.75%和1.0%L-AG显著提高了全鱼粗蛋白含量(P〈0.05)。添加0.25%~1.0%L-AG对全鱼水分、粗脂肪和灰分含量影响不显著(P〉0.05)。与对照组相比,添加0.25%~1.0%L-AG对肠道绒毛高度、微绒毛高度和肌层厚度均未产生显著影响(P〉0.05)。结果表明:外源补充0.75%~1.0%L-AG可显著提高杂交鲟仔鱼粗蛋白含量,但添加0.25%~1.0%L-AG对十二指肠形态不产生显著影响。
简介:【摘要】自2016年中国联通和中国电信合作开展共建共享以来,双方除了前期在5G合作共建以来,进一步开展了4G在不同场景,不同频段上共建共享实验,这就对双方的网络带来了影响,本文以杰座广场电信4G电联共享基站来分析,西安电信L2.1第二载波频点500,带宽10M;联通L2.1频点450,带宽20M,电信和联通重叠10M频谱(下行2155-2165,上行1965-1975),在杰座广场电信开通L2.1第二载波后,发现该站点与联通L2100共址,为验证联通L2.1的对电信L2.1的第二载波的影响情况,双方进行了多维度测试验证。
简介:identification and classification of learning strategy. The problems are reviewed concerning the definition and classification of learning strategies and then the paper tentatively introduces Cohen’s approach to defining learning strategies in terms of prototypicality of features of learning strategies.,Cohen’s attempt to describe the prototypicality of strategies is a step forward concerning defining learning strategies. It might reflect the nature of learning strategies to a large extent because the answers to the questionnaire come from strategy experts. It is true that some problems still exist. For example,all-or-nothing feature but in terms of how far along a continuum a feature could possibly go before it stopped being descriptive of a strategy. This is an approach of defining learning strategies in terms of how prototypical the feature was. These features as follows are arranged in a descending order of agreement
简介:让f(z)是为完整的模块化的组的重量k的holomorphicHeckeeigencuspform。让f(n)是f(z)的第n个规范的Fourier系数。建议那L(sym2f,s)对称的方形的L功能与f(z)被联系,并且$\lambda_{sym^2f}(n)$(n)表示第n系数L(sym2f,s)。在这份报纸,它被证明那$$\sum\limits_{n\leqslantx}{\lambda_{sym^2f}^4(n)}=xP2(\logx)+O(x^{\frac{{79}}{{81}}+\varepsilon}),$$,在P2(t)是在度2的t的一个多项式的地方。同样,它被获得那$$\sum\limits_{n\leqslantx}{\lambda_f^4(n^2)}=x\tildeP2(\logx)+O(x^{\frac{{79}}{{81}}+\varepsilon}),$$,在哪儿$\tildeP_2(t)$是在度2的t的一个多项式。