A theoretical analysis of a new type of sensor on satellite

1986 ◽  
Vol 3 (4) ◽  
pp. 263-273
Author(s):  
Zhang Jinbiao
Keyword(s):  
Theoretical Analysis ◽  
New Type

scholarly journals Molecular Simulation and Theoretical Analysis of Slide-Ring Gels under Biaxial Deformation

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 129
Author(s):  
Kotaro Tanahashi ◽  
Tsuyoshi Koga
Keyword(s):  
Theoretical Analysis ◽  
Molecular Mechanism ◽  
Elastic Properties ◽  
Mechanical Characteristics ◽  
Slip Model ◽  
Biaxial Deformation ◽  
New Type ◽  
Cross Links ◽  
Nonlinear Stretching ◽  
Stretching Effect

Slide-ring (SR) gels, a new type of gels that have cross-links moving along the chains, are known to have unique mechanical characteristics. In the case of biaxial deformations, it has been experimentally shown that the stress–strain (S–S) relationships of SR gels can be well described by the neo-Hookean (NH) model. This behavior is quite different from that of conventional chemical gels, where the S–S curves deviate from the NH model. To understand the molecular mechanism of such peculiar elastic properties of SR gels, we studied the effects of movable cross-links by using molecular simulations and theoretical analysis. We calculate the S–S relationships in biaxial deformation for two types of models: slip model, where the cross-links can slide along chains representing SR gels, and non-slip model, which corresponds to conventional chemical gels. In the theoretical analysis, we calculate the S–S relationships by using the models with the Gaussian and the Langevin chains to investigate the nonlinear stretching effect of the chain in the slip and non-slip models. As a result, we found that the peculiar elastic behaviors of SR gels in biaxial deformations are well explained by the effect of movable cross-links suppressing the nonlinear stretching of the chain.

A Hybrid Model of Cross-Domain Authentication for Password Synchronization

2011 ◽  
Vol 474-476 ◽  
pp. 729-734
Author(s):  
Qiu Yu Zhang ◽  
Zhi Peng Cai ◽  
Zhan Ting Yuan ◽  
Feng Man Miao
Keyword(s):  
Distributed Computing ◽  
Theoretical Analysis ◽  
Hybrid Model ◽  
Transport Protocols ◽  
Key Technology ◽  
Cross Domain ◽  
New Type ◽  
Hybrid Cross

Cross-domain authentication is a key technology used in distributed computing, however, it isn’t perfect. In this paper, a new type of hybrid cross-domain authentication model is proposed to make up its shortcoming in safety, scalability and password synchronization. In this model, advantages of Kerberos and SAML in cross-domain authentication process are combined, and it mixed password transport protocols is adopted to achieve password synchronization. Theoretical analysis shows it can enhance the security and scalability of cross-domain authentication, the efficiency of cross-domain authentication is also improved as the attainment of password synchronization.

scholarly journals Modeling, Testing, and Characteristic Analysis of a Planetary Flywheel Inerter

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Zheng Ge ◽  
Weirui Wang
Keyword(s):  
Theoretical Analysis ◽  
Planetary Gear ◽  
Gear Ratio ◽  
Ball Screw ◽  
Ring Gear ◽  
Characteristic Analysis ◽  
Planetary Gears ◽  
Nonlinear Dynamical ◽  
Output Force ◽  
New Type

We propose the planetary flywheel inerter, which is a new type of ball screw inerter. A planetary flywheel consists of several planetary gears mounted on a flywheel bracket. When the flywheel bracket is driven by a screw and rotating, each planetary gear meshing with an outer ring gear generates a compound motion composed of revolution and rotation. Theoretical analysis shows that the output force of the planetary flywheel inerter is proportional to the relative acceleration of one terminal of the inerter to the other. Optimizing the gear ratio of the planetary gears to the ring gear allows the planetary flywheel to be lighter than its traditional counterpart, without any loss on the inertance. According to the structure of the planetary flywheel inerter, nonlinear factors of the inerter are analyzed, and a nonlinear dynamical model of the inerter is established. Then the parameters in the model are identified and the accuracy of the model is validated by experiment. Theoretical analysis and experimental data show that the dynamical characteristics of a planetary flywheel inerter and those of a traditional flywheel inerter are basically the same. It is concluded that a planetary flywheel can completely replace a traditional flywheel, making the inerter lighter.

Compound Synchronization Based on Memristive Cellular Neural Network of Chaos System

2016 ◽  
Vol 12 (3) ◽  
Author(s):  
Xiaohong Zhang ◽  
Linyu Liao
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Theoretical Analysis ◽  
Lyapunov Stability Theory ◽  
Cellular Neural Network ◽  
Synchronous Control ◽  
Compound Synchronization ◽  
New Type ◽  
Response Systems ◽  
Drive Systems

As a especial type of synchronous method, compound synchronization is designed by multiple drive systems and response systems. In this paper, a new type of compound synchronization of three drive systems and two response systems is investigated. According to synchronous control of five memristive cellular neural networks (CNNs), the theoretical analysis and demonstration are given out by using Lyapunov stability theory. The corresponding numerical simulations and synchronous performance analysis are supplied to verify the feasibility and scalability of compound synchronization design.

Research on the Fracture Splitting Technology of Connecting Rod Based on Car TSI Engine

2013 ◽  
Vol 791-793 ◽  
pp. 631-634 ◽  
Author(s):  
Tian Ming Liu ◽  
Wen Xu ◽  
Wei Dong Feng
Keyword(s):  
Chemical Composition ◽  
Theoretical Analysis ◽  
Physical Properties ◽  
Comprehensive Analysis ◽  
Process Parameter ◽  
Connecting Rod ◽  
Mechanical And Physical Properties ◽  
Type Fracture ◽  
Fracture Splitting ◽  
New Type

The research of the expanding broken technology of engine connecting rod (also known as the fracture splitting technology) is based on some known factors which effect on connecting rod splitting to make comprehensive analysis on 36MnVS4, the material of connecting rod which is suitable for the fracture splitting technology, it analyses the effect of each chemical composition in steel on mechanical and physical properties, for material steel of new type fracture splitting connecting rod , and makes a theoretical analysis on the fracture splitting technology of the engine connecting rod. Through the analysis and research, a new method to research the fracture splitting of connecting rod is determined, as well as gets some rules to affect process parameter.

scholarly journals Fact-Alternating Mutex Groups for Classical Planning

2018 ◽  
Vol 61 ◽  
pp. 475-521
Author(s):  
Daniel Fišer ◽  
Antonín Komenda
Keyword(s):  
Linear Programming ◽  
Theoretical Analysis ◽  
Complexity Analysis ◽  
Simple Algorithm ◽  
Finite Domain ◽  
Initial State ◽  
Pruning Algorithm ◽  
Dead End ◽  
New Type ◽  
Np Complete

Mutex groups are defined in the context of STRIPS planning as sets of facts out of which, maximally, one can be true in any state reachable from the initial state. The importance of computing and exploiting mutex groups was repeatedly pointed out in many studies. However, the theoretical analysis of mutex groups is sparse in current literature. This work provides a complexity analysis showing that inference of mutex groups is as hard as planning itself (PSPACE-Complete) and it also shows a tight relationship between mutex groups and graph cliques. This result motivates us to propose a new type of mutex group called a fact-alternating mutex group (fam-group) of which inference is NP-Complete. Moreover, we introduce an algorithm for the inference of fam-groups based on integer linear programming that is complete with respect to the maximal fam-groups and we demonstrate how beneficial fam-groups can be in the translation of planning tasks into finite domain representation. Finally, we show that fam-groups can be used for the detection of dead-end states and we propose a simple algorithm for the pruning of operators and facts as a preprocessing step that takes advantage of the properties of fam-groups. The experimental evaluation of the pruning algorithm shows a substantial increase in a number of solved tasks in domains from the optimal deterministic track of the last two planning competitions (IPC 2011 and 2014).

scholarly journals Unmanned Wing-in-Ground-Effect Ship Design with Optimized Propulsion Mode

2021 ◽  
Vol 261 ◽  
pp. 01069
Author(s):  
Han Zeng ◽  
Yan Zhang
Keyword(s):  
Theoretical Analysis ◽  
Operating Performance ◽  
Ground Effect ◽  
Economic Benefits ◽  
Ship Design ◽  
Large Margin ◽  
Ducted Fan ◽  
New Type ◽  
Type Water ◽  
Propulsion Unit

In order to solve the existing deficiencies of the unmanned WIG ship, a new type of unmanned WIG ship with the optimized propulsion unit was designed, where the lift-type water-air amphibious double-ducted-fan propulsion unit increased the drainage and navigation speed of the unmanned WIG ship by a large margin, and the load at the junction between the propulsion unit and ship body was reduced to a great extent. Through simulation and theoretical analysis, it is verified that the unmanned WIG ship with the optimized propulsion mode can further accelerate the drainage and navigation speed of the unmanned WIG ship and reduce the load at the junction between the propulsion unit and ship body during the navigation in water, so its operating performance and safety are both strengthened. Therefore, this newly developed unmanned WIG ship can deliver good social and economic benefits.

Analysis of Dynamic Behavior of Ultra-High Voltage Porcelain Arresters with New Type Lead Dampers

2012 ◽  
Vol 625 ◽  
pp. 61-68
Author(s):  
Xue Song Zhang ◽  
Ze Bing Dai ◽  
Zhi Cheng Lu ◽  
Cheng Chen Cui
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Analysis ◽  
Dynamic Behavior ◽  
Relative Displacement ◽  
Element Analysis ◽  
New Type ◽  
Maximum Root ◽  
Root Stress ◽  
High Voltage Porcelain

Dynamic behavior of the 1100kV porcelain arresters with and without the new type lead dampers and are investigated，based on theoretical analysis and finite element analysis. The results of theoretical analysis show that the dynamic response of 1100kv porcelain arrester can be decreased by damping measures, which can change the dynamic behavior of equipment. The results of finite element analysis show that the primary frequencies of these two structures are between 1Hz and 10Hz and the differences between them is not obvious, which indicated that the overall stiffness of the two structures is low and the frequency and vibration mode of these two structures have hardly been changed by the lead dampers. The level modes dominated the equipment, while vertical modes and torsional modes are not obvious. Owning to an effect of increment of damping device with the new type lead dampers, there is a reduction by 40% above in the maximum root stress of porcelain bushing. In the meantime, the new type lead dampers can also decrease the relative displacement at the top of equipment.

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