A new Nd(Ⅲ) coordination polymer [Nd(pidc)(H2O)4]·pidc-·7H2O(1,pidc2-= 2-py-ridyl-4,5-imidazoledicarboxylate) has been synthesized by solvothermal re
介绍一种简易口腔气体测量仪的设计，该设计能够实时检测人体口腔气体浓度，给出等级评定。利用LCD界面，实现实时显示。通过检测结果可知测量者口气是否清新，是否有异味，从而树立职
The Yb3+-doped LiGd(MoO4)2 crystal with the size up to Φ20×30 mm3 has been grown by Czochralski technique.The polarized room temperature absorption and em
综合考虑了在一定的时间段内机场乘坐出租车乘客的数量、机场到达的乘客数量、“蓄车池”等待的出租车数量以及该时间段内市区出租车服务密度、节假日因素、天气因素、司机的
The title compound, 5-(1H-benzoimidazol-2-yl)-3H-[1,2,3]triazole-4-carboxylic acid (C10H7N5O2·C3H7NO, Mr=302.30), has been synthesized and characterized by
The mechanism of cycloaddition reaction between singlet silylene carbene and acetone has been investigated with CCSD(T)//MP2/6-31G method. From the potential en
本文主要介绍一种自主巡航的四轴飞行器电路的硬件原理设计。四轴飞行器以STM32单片机为整个系统的控制核心,利用超声波模块、陀螺仪模块定高稳定飞行姿态,带动4个电机旋转飞
A dinuclear cadmium complex [Cd2(phen)2(C14H11O3)4(CH3CH2OH)]·(CH3OH)·(H2O) has been synthesized with benzilic acid and 1,10-phenanthroline by hydroth
The title compound of 4-(2-methylene-1-ethyl-3,3-dimethylindoline-2'-yl)-6,8-dibro-mo-1'-ethyl-3',3'-dimethylspiro[3,4-dihydro-2H-1-benzopyran-2
1控制体重育成期的体重是评价其品质的最适指标,如果有70%以上的个体体重处于鸡群平均体重±10%以内,则可判断鸡群发育比较整齐。雏鸡开食后的7~10天内,在鸡群中每天随机抽测100只鸡进行个体体重测定,将称重结果与标准体重进行比较和研究,根据比较结果再确定日常饲养管理工作。如果所测体重的平均值处于标准体重的中间值与上限值之间,则说明蛋鸡之后的产蛋成绩为良好。如果测定的体重平均值低于标准体重下限值时