Imai lab. IIS, The University of Tokyo + hclab. + LOW FAT structure.Inc

Read more# Category: analyzing

## Evaluating Accessibility to parking lots

A store owner in an area where public transportation network is not very developed wants to grasp his store’s site condition considering car access, because residents of such an area usually move by private car. In this situation, evaluating accessibility for parking lots must not be overlooked. In this article, we will show a simulation for evaluating accessibility to parking lots. There are 7 Ome municipal parking lots and 6 private parking lots in this area. The following illustration represents mapping of these parking lots. In the simulation, we presume that visitors of this area park their cars in the closest parking lot from the present place. We set initial condition […]

Read more## Evaluating Openness index of streets.

We can consider “Openness of street” as one conventional comfort index. In order to evaluate this index, we emit rays from a certain point, and calculate the number of rays which can reach the sky without being obstructed by the other buildings or trees. By carrying out calculations on whole points in a street, we can draw a distribution of “Openness index”. This Openness index is useful for simulate the influence toward surround buildings, and we can use this simulation when designing new buildings.

Read more## Evaluating shopping streets–Local cooperation between existing stores and new stores

There are many cases where it is difficult to refurbish vacant stores in some area simultaneously. In this cases, what order should we refurbish that vacant stores? We propose new index for this situation from the point of view of local cooperation between existing stores and new stores. In this article, we focus on restaurants and give priority to these vacant stores. First of all, we find out actual street network from existing stores and streets. This actual street network is not so call shopping streets but “VITAL” shopping street. Later, we calculate betweenness centrality of vital street network when people visit each store in the area. (High rated nodes […]

Read more## Evaluating accessibility based on min-sum distance weighted by population distribution

In this article, we try to evaluate accessibility based on min-sum distance weighted by population distribution in Ome, Tokyo. We can basically say that the population of certain place is directly proportional to a gross area of certain building. Therefore, we can add values of population to each nodes. To consider the outside population distribution of this area, we divide outside area into 6 super nodes, and add the values as attributes.

Read more## What if we can relocate convenience stores in accordance with fairness.

Convenience stores in Japan become more and more important not only in a normal time but also in a time of disaster. Therefore, locating convenience stores in accordance with fairness becomes very important to enhance safety of a region. In this article, we try to relocate convenience stores in Ueno, Tokyo as a trial experiment. There are 215 convenience stores in Ueno. Usually, we draw voronoi diagrams when estimating “sphere” of certain facility (convenience store), but note that we have to consider not “Euclidean distance” but “Network distance”. When we focus on one sphere and calculate min-sum point of this sphere, the location of convenience store is not correspond to […]

Read more## What if we can cancel the restriction of one-way street in Kyoto?

Min-Max is a decision rule used in decision theory, game theory, statistics and for minimizing the possible loss for a worst case (maximum loss) scenario. The presence or absence of one-way street will affect on accessibilities of places. In this article, we will adopt this index to every intersections in Kyoto, assuming many situations including cancellation of restrictions of one-way street. Index of “min-max” is very important when we have to decide a location of emergence vehicle station, because this index means that how efficiently we can relief a person in disadvantage. The left side of figure3 shows distribution of one-way streets in Kyoto (red represents one-way, blue represents two-way […]

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