This paper aims to propose a modeling framework for subway operation and maintenance system (SOMS), which analyzes the train condition data based on both train sensor network data and basis train maintenance plan. The system is formulated into five function modules, and the research problem is to determine one auxiliary maintains plan, including the time allocation and frequency of maintenance....

high speed wind tunnels are widely used in the study of fluid flow behavior around various objects. the air flow in the starting step of supersonic wind tunnels is transient including strong shock waves caused by the interaction of the tunnel main stream and the boundary layer at walls. to arrive in running step, the tunnel must be designed so as these waves leave immediately the test section. ...

BACKGROUND Optimal tunnel placement is critical in anterior cruciate ligament reconstructive surgery, yet the method used to drill the tunnels may compromise their placement. HYPOTHESIS An independent drilling method versus a conventional transtibial drilling method will place tunnels in different locations and produce reconstructions with different kinematics. STUDY DESIGN Controlled labor...

The computational prediction of ligand entry and egress paths in proteins has become an emerging topic in computational biology due to the potential for estimating kinetic properties of drug binding. These properties are related to important pharmacological quantities such as the kon and koff rate of drugs [1,2].We have investigated the influence of protein flexibility on tunnel prediction usin...

Wind tunnels allow researchers to investigate animals' flight under controlled conditions, and provide easy access to the animals during flight. These increasingly popular devices can benefit integrative migration biology by allowing us to explore the links between aerodynamic theory and migration as well as the links between flight behavior and physiology. Currently, wind tunnels are being use...

With the acceleration of urbanization, construction urban subway tunnel networks is advancing towards deeper, denser, and larger subterranean forms. Currently, there a lack systematic identification dynamic reasoning analysis factors throughout entire process using mining method. To reduce probability accidents improve safety risk management in whole method, we propose evaluation method based o...

Pressure balance control between steel sleeve fillings and stratum is the key to ensuring project safety in receiving construction of subway shield tunnels. Here, realize active regulation filing pressure sleeve, this study first improves fixed cover a conventional piston that can slide freely along longitudinal direction puts forward corresponding methods for hydraulic mechanical regulation. T...

OBJECTIVE The objective of our study was to evaluate the effect that knee flexion angle while femoral tunnels are being drilled may have on the length of these tunnels, in anatomical reconstruction of the anterior cruciate ligament. METHODS We measured the lengths of anteromedial and posterolateral tunnels for the anterior cruciate ligament in 20 unpaired anatomical knee specimens (10 right a...

Studying all non-redundant proteins in 76 most-commonly found structural domains, we decipher latent patterns that characterize acceptable and unacceptable symmetries in residue-residue interactions in functional proteins. Cutting across the structural classes, a select set of pairwise interactions are found to be universally favored by geometrical and evolutionary constraints; these symmetric ...

We present a new theory which describes the collection of all tunnels of tunnel number 1 knots in S (up to orientation-preserving equivalence in the sense of Heegaard splittings) using the disk complex of the genus-2 handlebody and associated structures. It shows that each knot tunnel is obtained from the tunnel of the trivial knot by a uniquely determined sequence of simple cabling constructio...