变介质结构烟囱的定向爆破拆除

根据一烟囱底座为高3m的钢筋混凝土结构,筒体为40m高砖结构的特殊变介质烟囱特点,通过对爆破方案进行精心设计和严密组织,使得烟囱准确定向倾倒取得成功。包括了预定方案的分析和选取、爆破参数、起爆网路、预处理和安全防护等,并对爆破效果进行了描述。

Distinct phase transitions and dielectric anomalies in two 4-methylanilinium salts

Solid-state phase transitions of 4-methylanilinium perchlorate （4-CH3C6H4NH3.C104, 1） and tetrafluoroborate （4-CH3C6H4- NH3-BF4, 2） were investigated with variable-temperature X-ray single-crystal structure analysis and thermal studies. Both 1 and 2 undergo first-order phase transitions and exhibit distinct dielectric anomalies at 385 and 247 K, respectively.