The total synthesis , structural modification and structure - activity relationship of huperzine a have been systematically reviewed 本文系統(tǒng)地綜述了石杉鹼甲的全合成方法、結(jié)構(gòu)改造工作及構(gòu)效關(guān)系的研究。
The total chemical synthesis , structural modification and structure - activity relationship of huperzine a have been systematically reviewed 本文系統(tǒng)地綜述了石杉?jí)A甲的全合成方法、結(jié)構(gòu)改造工作及構(gòu)效關(guān)系的研究。
Based on the optimal topological , structural modification has been implemented ; and it makes the structure has higher first - order natural frequency and less weight 在最優(yōu)拓?fù)浣Y(jié)構(gòu)的基礎(chǔ)上進(jìn)行結(jié)構(gòu)修改后,一階固有頻率明顯提高,而重量有所減小。
To guard against the dilapidation risk of the older properties , the approved sellers will be required to provide a satisfactory valuation report by a qualified valuer confirming that the underlying property is free of any material negative findings or unauthorized structural modifications 為了防止樓較高物業(yè)出現(xiàn)樓宇質(zhì)素嚴(yán)重轉(zhuǎn)壞的風(fēng)險(xiǎn),核準(zhǔn)賣方將須由合資格估值師滿意的估值報(bào)告,確認(rèn)相關(guān)物業(yè)并無(wú)重大損壞情況或未經(jīng)許可的結(jié)構(gòu)修改。
The works comprise mainly : the addition of passenger lifts to the four footbridges ; structural modifications of the footbridges ; construction of retaining walls ; demolition of a staircase and a ramp , and the associated lighting , drainage , utilities diversion and electrical and mechanical works 工程主要包括在四條行人天橋建造行人升降機(jī)將行人天橋作結(jié)構(gòu)更改;建造護(hù)土墻拆卸一條樓梯及一條斜道,以及進(jìn)行相關(guān)的照明設(shè)施排水系統(tǒng)公用設(shè)施遷移及機(jī)電工程。