The motion of lower plate can be selected discretionarily in the few motion modes such as device prizing , hydraulic cylinder and steel wheel according to the situation of construction site and the working habit of construction unit to content construction ' s requirements . 下盤的移位可根據(jù)施工現(xiàn)場(chǎng)情況及施工單位的工作習(xí)慣,在撬裝、液壓缸步標(biāo)、鋼輪等幾種移位方式中任意選取,以滿足施工的要求。
Abstract : bridge function and generalized bridge function are all three - valued function , and are made by initial sequence according as copied or shifted ways . they include some familiar orthogonal function of non - sine , such as walsh function . this paper briefly introduced some research advance on this subject , emphasized to introduce the copy theory and generalized copy method . the process of making ( generalized ) bridge function , its property and application , were introduced briefly 文摘:橋函數(shù)和廣義橋函數(shù)均為三值函數(shù)系,都是將初始序列經(jīng)復(fù)制方式和移位方式變換后而形成的.它們包括了一些常見的非正弦正交函數(shù),如沃爾什函數(shù)和方波函數(shù)等.簡要介紹了近10年來北京航空航天大學(xué)通信與電子系統(tǒng)博士點(diǎn)在非正弦正交函數(shù)方面研究的一些新進(jìn)展,重點(diǎn)介紹了復(fù)制理論和廣義復(fù)制方法,橋函數(shù)、廣義橋函數(shù)的復(fù)制生成方法、性質(zhì)及其應(yīng)用等專題