Study on Precessional Motion Simulation of Ballistic Missile Midcourse

2014 ◽  
Vol 484-485 ◽  
pp. 1087-1092
Author(s):  
Hong Wang ◽  
Chuang Ming Tong ◽  
Jia Jia Sun
Keyword(s):  
Research Result ◽  
Three Dimensional ◽  
Euler Angle ◽  
Ballistic Missile ◽  
Motion Simulation ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Motion State ◽  
Precessional Motion

This paper, in view of the important role of ballistic missile motion state tracking in anti-missile combat, analyzes the research status.Combined with the current research achievements, according to the precessional motion state of ballistic missile midcourse, this paper researches and establishes its dynamic model and the precessional motion model based on Euler angle representation. Finally, based on the three-dimensional model of ballistic missile motion, it conducts simulation and verification. The research result has a certain reference significance for target recognition of ballistic missile midcourse.

scholarly journals Substrate (aglycone) specificity of human cytosolic beta-glucosidase

2003 ◽  
Vol 373 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Jean-Guy BERRIN ◽  
Mirjam CZJZEK ◽  
Paul A. KROON ◽  
W. Russell MCLAUCHLAN ◽  
Antoine PUIGSERVER ◽  
...  
Keyword(s):  
Structural Model ◽  
Homology Modelling ◽  
Three Dimensional ◽  
Amino Acid Residues ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Mutant Proteins ◽  
Metabolizing Enzyme ◽  
Beta Glucosidase

Human cytosolic β-glucosidase (hCBG) is a xenobiotic-metabolizing enzyme that hydrolyses certain flavonoid glucosides, with specificity depending on the aglycone moiety, the type of sugar and the linkage between them. Based upon the X-ray structure of Zea mays β-glucosidase, we generated a three-dimensional model of hCBG by homology modelling. The enzyme exhibited the (β/α)8-barrel fold characteristic of family 1 β-glucosidases, with structural differences being confined mainly to loop regions. Based on the substrate specificity of the human enzymes, sequence alignment of family 1 enzymes and analysis of the hCBG structural model, we selected and mutated putative substrate (aglycone) binding site residues. Four single mutants (Val168→Tyr, Phe225→Ser, Tyr308→Ala and Tyr308→Phe) were expressed in Pichia pastoris, purified and characterized. All mutant proteins showed a decrease in activity towards a broad range of substrates. The Val168→Tyr mutation did not affect Km on p-nitrophenyl (pNP)-glycosides, but increased Km 5-fold on flavonoid glucosides, providing the first biochemical evidence supporting a role for this residue in aglycone-binding of the substrate, a finding consistent with our three-dimensional model. The Phe225→Ser and Tyr308→Ala mutations, and, to a lesser degree, the Tyr308→Phe mutation, resulted in a drastic decrease in specific activities towards all substrates tested, indicating an important role of those residues in catalysis. Taken together with the three-dimensional model, these mutation studies identified the amino-acid residues in the aglycone-binding subsite of hCBG that are essential for flavonoid glucoside binding and catalysis.

The Parametric Analysis of the Threshold Value Judging Mechanism in MEMS Safety and Arming Device

2015 ◽  
Vol 645-646 ◽  
pp. 968-971
Author(s):  
Fu Fu Wang ◽  
Wen Zhong Lou ◽  
Fang Yi Liu ◽  
Da Kui Wang ◽  
Ming Rong Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Threshold Value ◽  
Element Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Long Distance ◽  
And Control ◽  
The Mathematical Model ◽  
The Finite Element Model

In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the threshold value judging mechanism is to determine the environment suffered by centrifugal force and control the sub-centrifugal slider not movement under the threshold, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of threshold value judging mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate threshold value judging mechanism is designed to meet two items, one item is the deformation of threshold value rod is not enough to release sub-centrifugal slider when the speed is less than 60000r/min; the other item is deformation of threshold value rod can release sub-centrifugal slider when the speed is more than 60000r/min.

scholarly journals The Model of Digital Cartographic Layers of Different Scales to Calculate the Ratios of Cartographic Generalizations: An Applied Study to Anah City

2021 ◽  
Vol 16 (7) ◽  
pp. 1245-1252
Author(s):  
Zuhair Jaber Mushref ◽  
Ameer Mohammed Khalaf ◽  
Salah Othman Abed Al-Ani
Keyword(s):  
Three Dimensional ◽  
Land Uses ◽  
Dimensional Model ◽  
Functional Importance ◽  
Three Dimensional Model ◽  
Applied Study ◽  
Digital Cartography ◽  
Accurate Perception ◽  
Modern Technologies

The research aims to give an accurate perception of the role of modern technologies, represented by geographic information systems, in extracting data and information, and then building a geographical database for urban land uses in an Ana city to reach generalized models based on the source map with a scale of 1/5000 and then building generalized models through The application of digital generalization elements according to the different standards adopted in the research (1/10000, 1/25000, 1/50000, 1/100000) in order to reach the end to the best results in the cartographic production of these models in a way that facilitates the process of understanding and perception by finding The most appropriate way to represent this data on a map according For the functional importance of each of the uses through disposal to eliminate overlap between uses Depending on the generalization elements of selecting, deleting, simplifying, smoothing, coding and exaggeration, and finally, as The research showed that there is a difference in the areas, uses and preparation of methods when moving from one scale to another. the research concluded by building a three-dimensional model to simulate the natural process of generalizing digital cartography according to different scales.

Flaws Simulation of Cave Depot in the Process of Explosion

2013 ◽  
Vol 385-386 ◽  
pp. 441-444
Author(s):  
Yi Hong Ou ◽  
Hai Bing Qian ◽  
Dong Wang ◽  
Ying Wu ◽  
Jian Jun Liang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Yield Surface ◽  
Dispersion Model ◽  
Research Result ◽  
Three Dimensional ◽  
Linear Increase ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Explosion Pressure ◽  
Online Monitor

This paper adopts the program Ansys and its secondary exploit platform tools to construct three-dimensional model to simulate the destroy process of cave depot. The method that damage surface and yield surface are dealt separately, and dispersion model is forward to simulate flaws. And the results of numerical simulation have been debated to find the laws of flaws growth and distribution with increasing of explosion pressure. It can be found that with the the linear increase of explosion pressure, flaws and distribution regions of flaws grow and expand. Tension flaws are precede to shear flaws. Flaws regions appear in the order , namely, the center of the arch--arch foot-- flaws in the center arch propagation - flaws in other else regions propagation. The research result has important value for online monitor, maintain and reinforce of cave depot. And the technology that has been forwarded in this paper also supplies for the numerical simulation researcher.

Kinematics Analysis of on-Off Pressure Mechanism with Flexible Link for Offset Press

2011 ◽  
Vol 120 ◽  
pp. 321-324
Author(s):  
Jun Zhong Guo ◽  
Tian Tian Cai ◽  
Jun Ping Yang
Keyword(s):  
Optimal Design ◽  
Angular Velocity ◽  
Three Dimensional ◽  
Coupled System ◽  
Kinematics Analysis ◽  
Flexible Link ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Motion State

In order to analyze the influence on the motion state of on-off pressure mechanism with flexible link of offset press, pneumatic on-off pressure was as the research object, the three-dimensional model of on-off pressure mechanism was established by using ADAMS, the kinematics simulations of the on-off pressure process was carried out, the curve of the angular velocity, angle acceleration and displacement between rollers of eccentric bushing in both rigid and the rigid-flexible coupled system was got, the significant basis of optimal design for on-off pressure mechanism was provided.

scholarly journals Inhomogeneous stationary states of two-dimensional magnetofluids

1983 ◽  
Vol 30 (1) ◽  
pp. 95-107
Author(s):  
Roland Calinon ◽  
Danilo Merlini
Keyword(s):  
Three Dimensional ◽  
Stationary States ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
General Role ◽  
Poisson Equations ◽  
Principle Of Maximum Entropy ◽  
Principle Of Maximum

We discuss ensemble inhomogeneous states of general two-dimensional magneto-fluids. A subclass of approximate statistical inhomogeneous states of the model equation is constructed using the principle of maximum entropy. The fields are shown to satisfy generalized nonlinear Poisson equations and some limiting cases are solved analytically. The method is then applied to a pseudo-three-dimensional model of an electromagnetic filamentation instability. The results illustrate the general role of the global constants of the motion on the nature of the statistical profiles for the fields describing the most probable states in magnetofluids.

MATHEMATICAL AND NUMERICAL ANALYSIS OF A THREE-DIMENSIONAL FLUID FLOW MODEL IN GLACIOLOGY

2005 ◽  
Vol 15 (01) ◽  
pp. 37-52 ◽  
Author(s):  
JACQUES RAPPAZ ◽  
ADRIAN REIST
Keyword(s):  
Flow Model ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Ice Sheets ◽  
Tetrahedral Mesh ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Piecewise Polynomial Functions ◽  
Theoretical Results

The main goal of this article is to analyze a three-dimensional model for stress and velocity fields in grounded glaciers and ice sheets including the role of normal deviatoric stress gradients. This model leads to a nonlinear system of stationary partial differential equations for the velocity with a viscosity depending on the stress–tensor but which is not explicitly depending on the velocity. The existence and uniqueness of a weak solution corresponding to this model is established by using the calculus of variations. The approximation of this model is made by a finite element method with piecewise polynomial functions of degree 1 on a tetrahedral mesh and error analysis is performed. Numerical solutions show that the theoretical results we have obtained are almost optimal.

scholarly journals BUILDING A THREE-DIMENSIONAL MODEL OF AXIAL JET IN SOLIDWORKS

2019 ◽  
Vol 7 ◽  
pp. 76-79
Author(s):  
Vladimir Papulov
Keyword(s):  
Computer Simulation ◽  
Three Dimensional ◽  
Machine Building ◽  
Water Jet ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Building Orientation

The article provides a brief description of the construction of the main parts of the three-dimensional model of the axial water jet, followed by their Assembly into the finished product. The role of computer simulation in the design of complex types of propellers, which include water jet, is shown. The possibility of solving problems of hydrodynamics with the help of "SolidWorks"is demonstrated. The design of the water jet pipe, taking into account the absence of cavitation. The urgency of application of three-dimensional modeling in the field of shipbuilding, using CAD-programs of machine-building orientation is shown.

Sign in / Sign up

Export Citation Format

Share Document