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1、第9卷 第1期 2009年1月167121819(2009120034204科 学技术与工程Science Technolo gy and Engi neeringVol19 No 11 Jan .2009Z 2009 Sci 1Tech 1Engng 1计算机技术决策树C4.5算法的改进及应用黄爱辉(湖南娄底职业技术学院电子信息工程系,娄底417000摘 要 根据C4.5算法中信息增益率计算原理的特点,利用数学上...
植物,并在中新 [E1periment SugarPlanters’Assoc, Citation 4 Honolulu,HI]ThisWeek’s Classic.CC,NUMBER 世繁盛起来clo]。可见,C。植物的演化是被子植物 JANUARY198l,26:25. 对当时CO:浓度骤降和气候变化的一种适应。 6 2.3进一步揭示了CAM植物的秘密C。途径的 Kortschak. 发现,使科学家弄清了景天科酸代谢...
to explain the dominance of C4 dicots21,27, even though they did not separate Chenopod C4 species from cmPbhoCaaniODnnag2tlryeeiivnsdainunilnadegttegffooarMcostshtwioieolirnctlafoegoconrkctehCoo1,nf4ebddnpuiialrttamienoocettnthleseedxvlrapeidtedaaevnntiisomdcioeetpsnnhlcaieacneteasdtxsseppe...
K?figl?ufer 北京汉达森专业销售德国Adda"GMN GMN Freilauf FPD 442 Z 北京汉达森专业销售德国GMN"Gemu(Gemü) DN250 北京汉达森专业销售德国Gemu(Gemü)""Amphenol-Tuchel C016-20H003-110-12KABELSTECKER 3+PE/SCHRAUBROHS-KONFORMUSP: CZ 北京汉达森专业销售德国Amphenol-Tuchel""Gemu(Gemü) 285874774 GEM 673...
反应温度对芳构化产物收率及分布情况的影响。结果表明,随着反应温度的升高,副产物干气的收率逐 渐增大,液化石油气(LPG)的收率变化不大,目的产物汽油的收率逐渐减小,柴油收率则逐渐增大;汽油 中异构烷烃、正构烷烃和烯烃的质量分数逐渐减小,而芳烃的质量分数则逐渐增大,表明温度升高有利 ...
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LN 229细胞类似产品::RBMVEC细胞、SUM 52PE细胞、COLO-679细胞 HAVSMC细胞类似产品::HCC95细胞、P3/NS1/1-Ag4-1细胞、Colon-38细胞 HAVSMC细胞类似产品::HCC95细胞、P3/NS1/1-Ag4-1细胞、Colon-38细胞 BEAS-2B细胞类似产品::PA-1细胞、143TK-细胞、HCC0078细胞 ...
Microalgae are promising biodiesel pro- ducers due capacity to to their high accumulate a glarrogwetahmroatuen, thoigfhlipCidOw2 fiitxhaotuiotncoemffipceietnincgy,fohrigahraebnlveilraonndmaenndtaplosttarbelses tolerance, and the water2–5. However, the commercial production of microalgal ...