New Insights | Insight Maker

CLD

Yun-Tung Wang

2 days ago

Vulnerable Groups

Lina N

2 days ago

BTX - SOLUTION ECOSYSTEM

Gracia C. Tshama

2 days ago

https://zhuanlan.zhihu.com/p/141875765

传染病的传播模型，是以传染病的传播速度、空间范围、传播途径、动力学机理等为研究对象，用于指导传染病的预防和控制工作。常见的传染病模型按照具体的传染病的特点可分为 SI、SIS、SIR、SIRS、SEIR 模型。其中“S”“E”“I”“R”的现实含义如下：

S (Susceptible)，易感者，指缺乏免疫能力健康人，与感染者接触后容易受到感染；E (Exposed)，暴露者，指接触过感染者但暂无传染性的人，可用于存在潜伏期的传染病；I (Infectious)，患病者，指有传染性的病人，可以传播给 S，将其变为 E 或 I ；R (Recovered)，康复者，指病愈后具有免疫力的人，如是终身免疫性传染病，则不可被重新变为 S 、E 或 I ，如果免疫期有限，就可以重新变为 S 类，进而被感染。由以上四类人群根据不同的传染病进行组合，就可以产生不一样的模型。

SI模型

alex

3 days ago

Clone of Collab QI Training Dosing Model

KR

3 days ago

Theoretical Framework v04

Vjollce

3 days ago

This is a causal loop diagram trying to show the effects of constant management approval on time, creativity and frustration. Ultimately nothing gets implemented because the process of doing it drains the organisation of the will to do it :-) (I think)

CLD - Management Control Problems

Julio Graham

3 days ago

This is a rich picture showing the components of a manufacturing system. The client is losing money and is trying to discover why. This is a theoretical picture just to demonstrate how rich pictures can be developed in Insight Maker

Rich Picture of Manufacturing Plant

Julio Graham

94 3 days ago

Animals in the wild system

Ella Fleming

3 days ago

My Insight

Dea Amanda

3 days ago

My Insight

Dea Amanda

3 days ago

Concentration example

G R

3 days ago

Earth thermal steady state

Carrick M. Eggleston

3 days ago

Here we have created a stock-flow model for a linear function. Using a converter we can adjust the parameters m and b to find the least squares line through a set of data points.

1. Observe that the input values of the converter [data] need to be integer multiples of TimeStep() away from TimeStart() in order to have exactly one nonzero entry in the squared error variables.

2. You may enter your data points into [data] as a converter. However, you must enter the values from the time column as "times" in the [squared error] variable formula.

3. Because the model is for a linear function, Euler's Method solves the ODE exactly with any step size. This means you can adjust the step size according to the resolution of the data.

Clone of Linear Regression as ODE modeling with data

Jennifer Fruend

3 days ago

Digital Objects Taxonomy

Joseph Matemilola

3 days ago

各項目の番号に意味はありません．途中で面倒くさくなってしまいました．

河辺林保全に関する因果ループ図

Hiroki OKUMURA

3 days ago

Congestion and air pollution in the city due to too many cars is the initial situation to which different responses can be made. Either investments are made in new roads and parking facilities. The result is that the number of cars increases and congestion and air pollution rise. Or one invests in the expansion of cycle paths and makes cycling in the city more comfortable. This would lead to a decrease in the number of cars and improve the initial situation.

Clone of Test1