Causes and Countermeasures for the Decrease of Milk Fat Percentage in Dairy Cows;
奶牛乳脂率下降的原因与对策
Prevention of direct current insulation decrease in electric system;
电力系统直流绝缘下降及防范探讨
2%;and the pH was decreased in the sludge reduction process.
实验研究发现,在碱性环境中臭氧破解污泥的效果下降;将污泥pH调至11,24 h后,MLSS减少率=38。
Global convergence or a class of conjugate descent algorithm;
一族共扼下降算法的全局收敛性
F is adescent of f.
对于一类N维单位体到自身的连续映射f,我们利用了f的下降F以及Sharkovskii定理给出了这种映射有素周期点的一个必要条件———设F是f的下降,如果f有素周期点,则存在x∈Ω(f),使x是准周期点,但不是周期点。
The problem of environment caused by groundwater level continuous decline in the inland basins of arid area, Northwest China ——an example in middle reaches of Heihe river basin;
干旱区内陆平原地下水持续下降及引起的环境问题——以河西走廊黑河流域中游地区为例
A comparison of these statistics shows that every time there was one or two items of our students physical quality stop or decline.
从1979年至今我国已进行了六次大规模的学生体质健康调查,调查数据前后比较显示,我国学生的体能素质每次调查都有一到两项出现停滞或下降,到2002年我国学生的体能素质已经持续出现全面下降的趋势。
Excessive sand digging from the riverbed and runoff decline was mainly responsible for the dro.
结果表明,近十多年来,南港低潮位持续下降,而高潮位变化不大,2005年平均潮差达4。