摘要：Along with the rapid development of air traffic, the contradiction between conventional air traffic management(ATM)and the increasingly complex air traffic situations is more severe,which essentially reduces the operational efficiency of air transport systems. Thus,objectively measuring the air traffic situation complexity becomes a concern in the field of ATM. Most existing studies focus on air traffic complexity assessment,and rarely on the scientific guidance of complex traffic situations. According to the projected time of aircraft arriving at the target sector boundary,we formulated two control strategies to reduce the air traffic complexity. The strategy of entry time optimization was applied to the controllable flights in the adjacent upstream sectors. In contrast,the strategy of flying dynamic speed optimization was applied to the flights in the target sector. During the process of solving complexity control models,we introduced a physical programming method. We transformed the multi-objective optimization problem involving complexity and delay to single-objective optimization problems by designing different preference function. Actual data validated the two complexity control strategies can eliminate the high-complexity situations in reality. The control strategy based on the entry time optimization was more efficient than that based on the speed dynamic optimization. A basic framework for studying air traffic complexity management was preliminarily established. Our findings will help the implementation of a complexity-based ATM.

摘要：选用40头泌乳中期(169.8±8)DIM的中国荷斯坦奶牛随机分为4组,采用完全随机试验设计,研究日粮亚油酸和亚麻酸水平对乳脂CLA合成的影响。试验共设4个处理,分别为高亚油酸组(LA)、高亚麻酸组(LEA)、高亚油酸和亚麻酸组合组(HLALEA)和低亚油酸和亚麻酸组(LLALEA)。通过9周的试验结果表明,不同处理对干物质采食量、泌乳净能校正产奶量、乳蛋白及乳脂肪的含量和日产量均没有显著影响。增加日粮中LA或LEA的含量,能够显著降低乳脂C12∶0、C14∶0和C16∶0的含量(P0.05)。随着日粮中亚油酸含量的增加,LLALEA、HLEA、HLALEA和HLA组乳脂TVA和c9t11CLA的含量呈线性增加。HLEA组、HLALEA和HLA组乳脂TVA的含量分别比LLALEA组增加1.56、3.05和4.71 g/100 g,而c9t11CLA分别比LLALEA组提高2.5、2.8和3.7倍。因此表明,日粮亚油酸对乳脂c9t11CLA合成的贡献效果高于亚麻酸,而亚油酸调控乳脂CLA合成机制主要以提供乳腺SCD合成c9t11CLA所需的底物(TVA)为主。

摘要：以盐芥为材料,依据拟南芥AtHKT1基因的序列设计引物,扩增出盐芥中ThHKT1基因的部分序列。然后使用快速扩增(RACE)方法,从盐芥中克隆到ThHKT1基因cDNA序列。该序列全长1817bp,推测编码区长度为1503bp,编码500个氨基酸,等电点为8.82。其编码序列和氨基酸序列与拟南芥AtHKT1基因的相应序列同源性分别为82.8%和77.3%。

摘要：从拟南芥叶片提取总RNA,经反转录得到cDNA。根据Genbank数据库中已登记的拟南芥Na+/H+逆向转运蛋白基因AtNHX1的核苷酸序列设计并合成了1对克隆引物,通过PCR方法从cDNA中扩增出AtNHX1基因片段,将该目的片段克隆至pGEM-TEazy载体。通过酶切,从pGEM-TEazy载体上切下目的基因片段,替换pX6-GFP载体中的GFP基因,构建了AtNHX1基因cre/lox植物表达载体。