نتایج جستجو برای: a simulation

تعداد نتایج: 13518778  

In this paper, we present a data-driven method for crowd simulation with holonification model. With this extra module, the accuracy of simulation will increase and it generates more realistic behaviors of agents. First, we show how to use the concept of holon in crowd simulation and how effective it is. For this reason, we use simple rules for holonification. Using real-world data, we model the...

Vertical roller mills (VRMs) are well-established grinding equipment for various tasks in the coal and cement industry. There are few studies on simulation of VRMs. In this research work, application of perfect mixing model for simulation of a VRM in a cement grinding plant was investigated. Two sampling surveys were carried out on the VRM circuit. The samples and data from the first survey wer...

Journal: :iranian journal of radiation research 0
a. chaparian tehran university of medical sciences, medical physics and biomedical engineering department, tehran, iran m.a. oghabian tehran university of medical sciences, medical physics and biomedical engineering department, tehran, iran v. changizi tehran university of medical sciences, radiology technology department, tehran, iran

background: recently, it has been indicated that x-ray coherent scatter from biological tissues can be used to access signature of tissue. some scientists are interested in studying this effect to get early detection of breast cancer. since experimental methods for optimization are time consuming and expensive, some scientists suggest using simulation. monte carlo (mc) codes are the best option...

Journal: :medical journal of islamic republic of iran 0
fatemeh keshmiri faculty of medicine, tehran university of medical sciences, tehran, iran. sari ponzer södersjukhuset, karolinska institutet, stockholm, sweden. amir ali sohrabpour department of internal medicine, tehran university of medical sciences, tehran, iran. shervin farahmand department of emergency medicine, imam khomeini hospital, tehran university of medical sciences, tehran, iran. farhad shahi department of internal medicine, oncology department, tehran university of medical sciences, tehran, iran. shahram bagheri-hariri department of emergency medicine, imam khomeini hospital, tehran university of medical sciences, tehran, iran.

background: simulation can be used for educating, evaluating and assessing psychometric properties of an instrument. the aim of this study was to contextualize and assess the validity and reliability of the interprofessional collaborative assessment tool (icar) in an iranian context using simulation.   methods: in this descriptive study, contextualization of the icar was assessed through severa...

ژورنال: مدیریت سلامت 2020

Introduction: Hospital administrators have always faced the challenge of providing the best possible health services in a resource-limited environment. The patient flow throughout the hospital is affected by lack of the capacities that can lead to bed-blocking among the hospital units. In this research, the patient flow in the hospital is modeled as an open queueing network with blocking. Then,...

Journal: :TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 1989

Journal: :رادار 0
حمید رضا دهقان منشادی مهرزاد بیغش محمد علی مسندی شیرازی

see through the wall radar, is a relatively new small range radar that uses electromagnetic waves to detect targets behind wall. because of its symmetry, a conducting sphere is often used as a reference scatterer to calibrate radars. in this paper, to simulate received signal for see through the wall radar, scattering model of a conducting sphere in free space is presented. then using a dielect...

Journal: :iranian journal of radiation research 0
h.r. khosravi department of medical physics, faculty of medicine, tehran university of medical sciences, tehran, iran s. sarkar department of medical physics, faculty of medicine, tehran university of medical sciences, tehran, iran a. takavar department of medical physics, faculty of medicine, tehran university of medical sciences, tehran, iran m. saghari department of nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran m. shahriari department of medical radiation, shahid beheshti university, tehran, iran

background: various variance reduction techniques such as forced detection (fd) have been implemented in monte carlo (mc) simulation of nuclear medicine in an effort to decrease the simulation time while keeping accuracy. however most of these techniques still result in very long mc simulation times for being implemented into routine use. materials and methods: convolution-based forced detectio...

Aghaie , Abdollah, Zahedi Shoolami, Mahdi,

  Abstract: Analyzing different issues of most systems, particularly their design, implementation, and development, requires some sort of techniques which are capable of studying their special conditions in stochastic states. Simulation is regarded as one of the most efficient methods for this purpose in the area of engineering, systems, and management. Studying and analyzing a system under spe...

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