We study the rate of Zp approximation by Cesaro means of the quadratic partial sums of double Walsh-Fourier series offu nctions from Lp.
深入研究了气候变化与林业行动以及就业的相关关系,阐述了我国在应对全球气候变暖所采取的一些措施,并在此基础上做出了退耕还林等重大工程,进而定性分析了中国林业重点行动
尘肺病是职工在生产活动中由于长期吸人生产性粉尘并在肺内储留而引起的肺组织弥漫性纤维化病变为主的全身性疾病。尘肺是危害我国统配煤矿工人健康的最严重的职业病。尘肺病
This paper investigates the exact and approximate spectrum assignment properties associated with realizable output-feedback pole-placement type controllers for
以晶硅切割废砂浆回收中三级砂为原料,采用化学方法对其组分分离,设计正交实验,研究了液固比、溶液浓度等工艺因素对分离效果的影响,采用XRD和SEM对相组成和微观形貌进行分析,结果表明:采用酸浸渍法除铁,对三级砂的结构和形貌无影响,当液固比为12∶1,盐酸浓度为1.0 mol/L,浸溶温度为50℃,浸溶时间为1 h时,除铁效果最佳。进一步采用碱液滴加法除硅,可以实现三级砂中Si和Si C的有效分离,当
This paper gives two new inequalities, which improve two Polya-Szeg(o) 's inequlities.
The aim of this paper is to prove the following theorem concerning the term by term differentiation the-orem of Walsh-Kaczmarz series. Let (ck ) be a decreasing