Causes and Countermeasures for the Decrease of Milk Fat Percentage in Dairy Cows;

奶牛乳脂率下降的原因與對(duì)策

Prevention of direct current insulation decrease in electric system;

電力系統(tǒng)直流絕緣下降及防范探討

2%;and the pH was decreased in the sludge reduction process.

實(shí)驗(yàn)研究發(fā)現(xiàn),在堿性環(huán)境中臭氧破解污泥的效果下降;將污泥pH調(diào)至11,24 h后,MLSS減少率=38。

Global convergence or a class of conjugate descent algorithm;

一族共扼下降算法的全局收斂性

F is adescent of f.

對(duì)于一類(lèi)N維單位體到自身的連續(xù)映射f,我們利用了f的下降F以及Sharkovskii定理給出了這種映射有素周期點(diǎn)的一個(gè)必要條件———設(shè)F是f的下降,如果f有素周期點(diǎn),則存在x∈Ω(f),使x是準(zhǔn)周期點(diǎn),但不是周期點(diǎn)。

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;

干旱區(qū)內(nèi)陸平原地下水持續(xù)下降及引起的環(huán)境問(wèn)題——以河西走廊黑河流域中游地區(qū)為例

A comparison of these statistics shows that every time there was one or two items of our students physical quality stop or decline.

從1979年至今我國(guó)已進(jìn)行了六次大規(guī)模的學(xué)生體質(zhì)健康調(diào)查,調(diào)查數(shù)據(jù)前后比較顯示,我國(guó)學(xué)生的體能素質(zhì)每次調(diào)查都有一到兩項(xiàng)出現(xiàn)停滯或下降,到2002年我國(guó)學(xué)生的體能素質(zhì)已經(jīng)持續(xù)出現(xiàn)全面下降的趨勢(shì)。

Excessive sand digging from the riverbed and runoff decline was mainly responsible for the dro.

結(jié)果表明,近十多年來(lái),南港低潮位持續(xù)下降,而高潮位變化不大,2005年平均潮差達(dá)4。