03 // 双向 STEM 与金融计算器 // 统计推断、概率分布与风险指标计算器μ = λ × t

泊松过程预期事件次数与发生率计算器

利用 μ = λ × t 换算泊松过程预期发生次数 μ、单位时间平均到达率 λ 与观测时长 t。

μ = λ × t
选择要计算的未知量(或直接在任意输入框中输入数值):当前求解: μ — Expected Event Count (Mean & Variance)
计算结果

Expected arrivals in window t (also equals Poisson variance σ²)

0.01100,000.00
unit

Mean event rate per single time unit

0.00110,000.00
unit

Duration of the exposure interval

0.0110,000.00
unit
计算结果 · Expected Event Count (Mean & Variance) (μ)
30

分步代入计算过程

01Canonical Law: μ = λ × t
02Given Inputs (Base Units): λ = 2.5, t = 12
03Solve for μ (Expected Event Count (Mean & Variance)): μ = 30

In a homogeneous Poisson point process with memoryless independent arrivals at rate λ per unit time, the expected number of events (and variance) over window t is μ = λ × t.

常见参考标准值

Poisson Mean = Variance IdentityE[X] = Var(X) = μ

Standard deviation of count is σ = √μ = √(λt)

Zero-Event Probability P(X = 0)P(0) = e^(-μ)

Probability of zero failures/arrivals during interval t

Inter-Arrival Waiting TimeE[T_wait] = 1 / λ

Follows an Exponential(λ) distribution

20 行数值对照表

Expected Event Count (Mean & Variance) (μ) · Arrival Rate per Unit Time (λ)

Poisson Process Expected Events & Rate Calculator — Arrival Rate per Unit Time → Expected Event Count (Mean & Variance)
#Arrival Rate per Unit Time (λ)Expected Event Count (Mean & Variance) (μ)Δ %
012.5 当前30 0.00%
0272.5009 870.0113 +2800.04%
03145.0009 1,740.01 +5700.04%
04217.5008 2,610.01 +8600.03%
05290.0008 3,480.01 +11500.03%
06362.5007 4,350.01 +14400.03%
07435.0006 5,220.01 +17300.03%
08507.5006 6,090.01 +20200.02%
09580.0005 6,960.01 +23100.02%
10652.5005 7,830.01 +26000.02%
11725.0004 8,700.00 +28900.02%
12797.5003 9,570.00 +31800.01%
13870.0003 10,440.00 +34700.01%
14942.5002 11,310.00 +37600.01%
151,015.00 12,180.00 +40500.01%
161,087.50 13,050.00 +43400.00%
171,160.00 13,920.00 +46300.00%
181,232.50 14,790.00 +49200.00%
191,305.00 15,660.00 +52100.00%
201,377.50 16,530.00 +54999.99%
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常见问题解答 (FAQ)

如何使用在线 泊松过程预期事件次数与发生率计算器 工具?+

输入已知参数或拖动滑块,即可在浏览器中实时计算并可视化 泊松过程预期事件次数与发生率计算器(基于关系式 μ = λ × t)。利用 μ = λ × t 换算泊松过程预期发生次数 μ、单位时间平均到达率 λ 与观测时长 t。

可以导出或打印 泊松过程预期事件次数与发生率计算器 的结果吗?+

可以。支持一键复制数据、打印计算工作表或导出高清 SVG、PNG 和 CSV 文件。

我可以清空 泊松过程预期事件次数与发生率计算器 中的示例数据并从空白状态开始吗?+

可以。点击工具顶部的“清空 / 空白开始”按钮即可重置所有输入项,随时也可一键重新加载示例数据。