In bike-sharing systems, a small percentage of the bicycles become unusable every day. Currently, there is no reliable on-line information that indicates the usability of bicycles. We present a model that estimates the probability that a specific bicycle is unusable as well as the number of unusable bicycles in a station, based on available trip transaction data. Further on, we present some inf...

Understanding the regularity and determinants of mobility is indispensable for reasonable deployment shared bicycles urban planning. A spatial interaction network covering streets in Beijing’s six main districts, using bike sharing data, constructed analyzed. as Additionally, exponential random graph model (ERGM) used to interpret influencing factors structure regularity. The characteristics te...

The safety of a pedestrian crossing may depend on infrastructure, vehicular and traffic characteristics. This academic research typically portrays the challenges knowingly caused by vehicles crosswalks in city Kigali. Through carefully observing stopping local drivers events, study aims to objectively evaluate drivers’ questionable behavior against flow parameters. Ten collection sites were ult...

High levels of car dependence have caused tremendous challenges for sustainable transport development. Transport planners, therefore, seek ways replacing motor vehicles, as well increasing the proportion active travel. The bike-sharing scheme can be seen an effective way doing so, particularly in Asian cities. aim this paper is to investigate users’ perspectives on development using Shanghai ex...

Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems for bicycles. The purpose of this work is to propose a design methodology for the kinematic design of automatic gear transmissions with planetary gear trains for bicycles. First, applying the check list method (combining and extending methods), the design concep...

Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems with multi-speed for bicycles. The purpose of this work is to propose a design methodology for the design of automatic three-speed gear hubs with planetary gear trains for bicycles. First, applying the check list method (combining and extending methods), the des...

A flexible approach to construct sterically congested bicyclo-alkenedione frameworks is reported. Under the action of potassium carbonate, α-sulphonyl cycloalkanones are added to functionalized allenyl esters, leading to a lactone intermediate that is subsequently reduced to initiate an intramolecular aldol cyclization to [3.2.1], [3.3.1], and [4.3.1] bicycles. Oxidation then affords bicyclic d...