填空题
变形监测的精度要求倾斜中误差限值为坝顶为（）秒，坝基为（）秒。
发布日期：2021-05-09
试题解析
变形监测
变形监测就是利用专用的仪器和方法对变形体的变形现象进行持续观测、对变形体变形形态进行分析和变形体变形的发展态势进行预测等的各项工作。变形监测包括建立变形检测网，进行水平位移、沉降、倾斜、裂缝、挠度、摆动和振动等监测。
- 中文名
- 变形监测
- 观测
- 变形体的变形现象
- 外文名
- Deformation Monitoring
- 对象
- 工程建筑物
中误差
中误差是衡量观测精度的一种数字标准，亦称“均方根差”。在相同观测条件下的一组真误差平方平均值的平方根。因真误差不易求得，所以通常用最小二乘法求得的观测值改正数来代替真误差。它是观测值与真值偏差的平方和观测次数n比值的平方根。中误差不等于真误差，它仅是一组真误差的代表值。中误差的大小反映了该组观测值精度的高低，因此，通常称中误差为观测值的中误差。
- 中文名
- 中误差
- 别名
- “
- 代替值
- 真值只能用
- 方法
- 最小二乘法
- 外文名
- root mean square error;RMSE
- 定义
- 衡量
- 性质
- 描述代数误差
- 计算
- 观测值与真值偏差平方和
限值
限值，数学名词，指不能到达的数值。限值不等于极限，限值与极限是两个相邻的点，两者很容易搞混，两者明显的不同是，限值是不能到达的，极限是能够到达的。
- 中文名
- 限值
- 定义
- 不能到达的数值
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