scholarly journals Condition equation of polymer filaments

2020 ◽  
Vol 20 (6) ◽  
pp. 877-882
Author(s):  
V.V. Golovina ◽  
E.A. Shakhova ◽  
P.P. Rymkevich
Keyword(s):  
Condition Equation

scholarly journals A Sort of New Improved Algorithm For Total Least Square

2015 ◽  
Vol 9 (1) ◽  
pp. 238-247
Author(s):  
Deng Yonghe
Keyword(s):  
Least Square ◽  
New Method ◽  
Unknown Parameters ◽  
Error Equation ◽  
Virtual Observation ◽  
Condition Equation ◽  
Total Least Square ◽  
Improved Algorithm

Aim to blemish of total least square algorithm based on error equation of virtual observation, this paper put forward and deduced a sort of new improved algorithm which selects essential unknown parameters among designing matrix, and then, doesn’t consider condition equation of unknown parameters among designing matrix. So, this paper perfected and enriched algorithm, and sometimes, new method of this paper is better. Finally, the results of examples showed that new mothod is viable and valid.

Simulation and Optimized Analysis of Channel for Injection Molding of Bottle Cap Based on Moldflow

2014 ◽  
Vol 889-890 ◽  
pp. 587-590
Author(s):  
Cong Zhang ◽  
Lei Lei Han ◽  
De Yang ◽  
Hui Min Zhang
Keyword(s):  
Injection Molding ◽  
Surface Quality ◽  
Simulation Optimization ◽  
Channel Number ◽  
Heat Condition ◽  
Quality Requirements ◽  
Cooling Circuit ◽  
Condition Equation ◽  
Model Scheme ◽  
Simulation Scheme

A simulation optimization of a two-cavity injection molding for the bottle cap was studied. It included the preprocessor of the model, scheme one which used a series recommended parameters from Moldflow software. Though the result could meet surface quality requirements, the mold structure was too complicated especially the channel. The deformation of different factors were analyzed and uneven cooling had little effect on the deformation. And some relative heat condition equation were used to calculate the channel number. Therefore the optimized scheme two was put forward. According to the cooling circuit and deformation factors, the channel number was greatly reduced. After the simulation, scheme two could also meet surface quality requirements. At the same time, the mold structure can get simplified.

Effect of Thermal Conductivity of the Soil Cover on the Air Temperature Dynamics under Natural Conditions and at Anthropogenic Loads

2012 ◽  
Vol 260-261 ◽  
pp. 852-855
Author(s):  
E.E. Kholoden ◽  
O.M. Morina ◽  
S.A. Lobanov
Keyword(s):  
Thermal Conductivity ◽  
Air Temperature ◽  
Soil Cover ◽  
Linear Trend ◽  
Russian Far East ◽  
Far East ◽  
Temperature Fields ◽  
Heat Condition ◽  
Condition Equation ◽  
Natural Mechanism

By the example of the southern Russian Far East territory, it was stated that a sign of the linear trend of the long-term air temperature variations in the warm and cold periods of the year depended essentially on the soil thermal conductivity. It was shown that the mechanism of the soil temperature fields’ formation was controlled by the Fourier heat condition equation. In this case, the modern anthropogenic loads on the soil cover can only slightly enhance or weaken the natural mechanism of forming the temperature fields of soil and air.

scholarly journals EXACT SOLUTIONS TO LATTICE BOUSSINESQ-TYPE EQUATIONS

2012 ◽  
Vol 19 (04) ◽  
pp. 1250031 ◽  
Author(s):  
WEI FENG ◽  
SONG-LIN ZHAO ◽  
DA-JUN ZHANG
Keyword(s):  
Plane Wave ◽  
Exact Solutions ◽  
General Condition ◽  
Soliton Solutions ◽  
Matrix Approach ◽  
Cauchy Matrix ◽  
Mixed Solutions ◽  
All Solutions ◽  
Condition Equation

In this paper several kinds of exact solutions to lattice Boussinesq-type equations are constructed by means of generalized Cauchy matrix approach, including soliton solutions and mixed solutions. The introduction of the general condition equation set yields that all solutions contain two kinds of plane-wave factors.

Identification of Parametric and Momentary Damages on the Basis of Lindeberg-Levy’s Model

2017 ◽  
Vol 260 ◽  
pp. 249-257
Author(s):  
Paweł Lindstedt ◽  
Tomasz Sudakowski
Keyword(s):  
Standard Deviation ◽  
Threshold Value ◽  
Technical Condition ◽  
Technical Object ◽  
Reliability Parameters ◽  
Innovative Method ◽  
Condition Equation ◽  
Lévy’S Theorem ◽  
The Moment ◽  
Damage Map

Article presents the innovative method for the assessment of reliability condition of the exploited system, based on the appropriate analysis of changes in the current parameters of technical condition aRb and the regulation condition aRc, determined from the compressed condition equation (1 and 2). While analyzing the course of momentary parameters for technical condition aRb and the regulation condition aRc, it was observed that the parametric and momentary damages can be identified on the basis of quantitative relations between momentary threshold value dpr and corresponding momentary permissible value dprdop, which are calculated from equation (7, 8, 9) resulting from Lindeberg-Levy’s theorem. It is assumed that the damages are prevailing, when for the moment θi: dpri>dpr dopi. With the number of damages (damage map), reliability parameters for each moment of exploitation of technical object (before the catastrophic damages will occur) can be determined. Parametric damages (expected lifetime E(T) and standard deviation of expected lifetime σE(T) provides the reasonable information for the appropriate planning of the servicing of exploitative objects.

Design on 3D Complex Groove of Turning Inserts with MATLAB

2009 ◽  
Vol 69-70 ◽  
pp. 636-640 ◽  
Author(s):  
X.M. Feng ◽  
Guang Yu Tan ◽  
Guan Hui Li ◽  
Yu Hua Zhang
Keyword(s):  
Turning Process ◽  
Design And Optimization ◽  
Chip Breaking ◽  
Groove Design ◽  
Condition Equation

The paper presented a method of designing grooves of turning insert with 3D complex groove; and deduced equation calculating the width of the grooves using condition equation of the chip breaking, the parameters included in the equation was taken place by equivalent ones. And the grooves width is computed by MATLAB, and then the curve of the groove is fitted. The width can be used to create model of the turning inserts with 3D complex groove by Pro/Engineer, and the model can be imported in ANSYS soft to simulate turning process and analysis groove performance. All this work provides a base for the groove design and optimization

On the Dead-Center Positions of Stephenson Six-Bar Linkage

2011 ◽  
Vol 52-54 ◽  
pp. 915-919
Author(s):  
Yan Huo Zou ◽  
Xiao Ning Guo ◽  
Jin Kui Chu
Keyword(s):  
Analytical Method ◽  
Input Parameter ◽  
Polynomial Equation ◽  
New Method ◽  
Necessary Condition ◽  
Input Output ◽  
Simple Analytical Method ◽  
Condition Equation ◽  
The Dead

A new method for identifying the dead-center positions of the Stephenson six-bar linkage is presented by this article. This method uses the input-output polynomial equation of the linkage and the corresponding Sylvester's resultant to formulate the necessary condition of the dead-center configurations as a polynomial equation in terms of the input parameter; then through a simple analytical method to obtain all the truly dead-center positions among the double roots to the condition equation. An example is given to demonstrate the validity of this method.

scholarly journals A fracture-entrainment model for snow avalanches

2008 ◽  
Vol 54 (184) ◽  
pp. 182-188 ◽  
Author(s):  
Genady P. Cherepanov ◽  
Ivan E. Esparragoza
Keyword(s):  
Fracture Mechanics ◽  
Basic Characteristic ◽  
Gravitational Force ◽  
Characteristic Property ◽  
Snow Avalanche ◽  
Necessary Condition ◽  
Snow Avalanches ◽  
Governing Equations ◽  
Downward Motion ◽  
Condition Equation

AbstractWe use the invariant Γ integral of fracture mechanics to calculate the frontal pressure and resistance to the downward motion a of snow avalanche. A basic characteristic property of the snowpack, termed the entrainment toughness, is introduced. From an analysis of the non-entrainment frictional mechanisms of avalanches, we find the necessary condition for a fracture-entrainment regime, and from an analysis of limiting equilibrium of gravitational force and frontal resistance, the necessary condition equation for the start of avalanches. We then derive the governing equations for the dynamics of avalanches, using a point-mass approach with entrainment taken into account. The governing equations are used to numerically simulate the Vallée de la Sionne (Switzerland) avalanche of 7 February 2003.

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