scholarly journals Design of Shock Wave Storage and Test System with Variable Parameters Based on the Sensor of Piezoelectric Circuit

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zhi Li
Keyword(s):  
Shock Wave ◽  
Data Storage ◽  
Large Scale ◽  
Low Cost ◽  
Complex Structure ◽  
Simulation Method ◽  
Test System ◽  
Dynamics Simulation ◽  
Storage Test ◽  
Variable Parameters

With the wide application of science and technology in the field of weapons, shock wave is an important breakthrough point in weapon research, and the storage and testing system of shock wave is a breakthrough point that people pay most attention to at present. Shock wave data storage has the characteristics of large scale, complex structure, low cost efficiency, and strong timeliness. This paper mainly studies the design of shock wave storage test system with variable parameters based on numerical piezoelectric circuit sensor. Based on fluid dynamics simulation theory and numerical simulation method, the normal and concave-convex three-dimensional models of two pressure measuring devices are constructed by using the flow waveform of calculator, and then, the network is divided. The results show that, under the same inlet pressure, the larger the bulge or depression value, the greater the influence on the experimental results. The influence of disk is 10% higher than that of pen, and the change rate of relative difference is increased by 1.5% with the increase of concave-convex value. Finally, experiments are carried out in different environments to verify the reliability, survivability, and flexibility. The shock wave storage test system is optimized when the parameters of the digital voltage circuit sensor are variable.

scholarly journals Effectiveness of Calcium Carbonate Whisker in Cementitious Composites

2020 ◽  
Author(s):  
Mingli Cao ◽  
Mehran Khan ◽  
Shakeel Ahmed
Keyword(s):  
Calcium Carbonate ◽  
Large Scale ◽  
Low Cost ◽  
Complex Structure ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Cementitious Composites ◽  
Toughening Mechanism ◽  
Micro Scale ◽  
Calcium Carbonate Whisker

Cementitious composites are porous material having complex structure system consist of hydration products, un-hydrated cement particles and pore solutions of various scales. Calcium carbonate whisker is a new type of low cost micro-scale filler fiber gaining popularity in the field of construction materials. However, addition of whisker has effect on physical, mechanical and microstructural characteristics of cementitious composites. Also, the low production cost of whisker will make the use of micro fiber more extensive in large scale construction projects. In this study, the effect of calcium carbonate whisker on physical, mechanical and microstructural properties of cementitious composites with different fiber contents are investigated. The fluidity, drying shrinkage, pore structure, impact resistance, compressive, flexural and splitting-tensile strength of whisker-mortar are considered. The scanning electron microscopy analysis is also performed to examine the microstructural and toughening mechanism of whisker reinforced composites. It was concluded that the addition of calcium carbonate whisker up to 10 % improves the physical and mechanical properties of cementitious composites and is suggested to be the optimize content. The calcium carbonate whisker also resists the crack propagation at micro scale and showed the toughening mechanism with better interfacial properties between whisker and matrix.

Development of Ferroelectric Data Storage Test System for High-Density and High-speed Read/Write

2009 ◽  
Vol 1199 ◽  
Author(s):  
Yoshiomi Hiranaga ◽  
Kenkou Tanaka ◽  
Tomoya Uda ◽  
Yuichi Kurihashi ◽  
Yasuhiro Kimoto ◽  
...  
Keyword(s):  
Thin Film ◽  
Data Storage ◽  
High Speed ◽  
Test System ◽  
Control Technique ◽  
Recording Media ◽  
Bit Rate ◽  
Recording Medium ◽  
Storage Test ◽  
Nonlinear Dielectric

AbstractIn this study, we have developed ferroelectric data storage test systems based on scanning nonlinear dielectric microscopy (SNDM) to conduct various experiments concerning read/write capability. Nanodomain formation on ferroelectric recording media was studied using the data storage test system. A nanodomain dot array was successfully written on a single-crystal LiTaO3 recording medium. The diameter of the written dot was as small as 7 nm. Epitaxial-thin-film LiTaO3 recording media were also developed. Nanodomain dots with the diameter of 25 nm were written on the thin-film recording medium. In addition, a non-contact probe-height control technique was adopted to solve the problem of tip abrasion using higher-order nonlinear dielectric response detection method. Finally, a hard-disk-drive (HDD)-type ferroelectric data storage test system was developed for conducting read/write tests under conditions close to those of actual operation. Capabilities of reading at the bit rate of 2 Mbps and writing at the bit rate of 20 Mbps were confirmed using the HDD-type data storage test system.

Design for a New Type of Powder Molding Equipment Based on Multibody Dynamics Simulation

2012 ◽  
Vol 468-471 ◽  
pp. 857-862
Author(s):  
Zhen Xing Zheng
Keyword(s):  
Powder Metallurgy ◽  
Multibody Dynamics ◽  
Lagrange Equation ◽  
Low Cost ◽  
Synthesis Method ◽  
Flexible Multibody Dynamics ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Flexible Body ◽  
Modal Synthesis

A new compaction powder metallurgy equipment integrated with the mould and the frame is introduced to substitute the traditional powder metallurgy equipment (P/M). During the design and manufacture, finite element method is used to analyze the motion of the equipment. The Lagrange equation and modal synthesis method for flexible body are constructed, and then the cooperative simulation method using ADAMS and MARC is present for solving flexible multibody dynamics of flexible body. Results show that the design of the structure of the powder metallurgy equipment is feasible and the low cost and the simple structure are its merits compared to the traditional equipment.

Various Applications of Nanowires

2021 ◽  
pp. 17-53
Author(s):  
Zahied Azam ◽  
Amandeep Singh
Keyword(s):  
Data Storage ◽  
Large Scale ◽  
Electrochemical Sensors ◽  
Defect Density ◽  
Low Cost ◽  
Volume Ratio ◽  
Economic Sectors ◽  
Health Security ◽  
Optical Output ◽  
Potential Applications

In this era of nanotechnology, nanowires (NWs) propose potential impact on electronics, computing, memory, data storage, communications, manufacturing, health, medicine, national security, and other economic sectors as well. NWs offer excellent surface-to-volume ratio (interface phenomena), low defect density, high optical output, and controllable n-type conductivity, making them more appropriate and sensitive for sensing applications. NWs with their ultra-sensitive and real-time detection capabilities lend their applications in nanobiosensors, chemical sensors, gas sensors, and electrochemical sensors. NWs have been used in improving the optical absorption as well as for the collection efficacy in photovoltaic devices. NWs having small size, low weight, low cost for mass production, and are also compatible with commercial planar processes for large-scale circuitry. In the chapter, the authors are focusing to summarize the recent advances in NWs with their potential applications in various fields such as research, health, security, education, entertainment, and power generation.

scholarly journals Research on Sand-dust Separation Technology Based on Gas-solid Two-phase Numerical Simulation

2020 ◽  
Vol 145 ◽  
pp. 02068
Author(s):  
Lei Zhang ◽  
Junwei Wang ◽  
Guohua Li
Keyword(s):  
Numerical Simulation ◽  
Large Scale ◽  
Separation Efficiency ◽  
Simulation Method ◽  
Test System ◽  
Two Phase ◽  
Separation Technology ◽  
Electromechanical Products ◽  
Environment Simulation ◽  
Sand Dust

The separation technology in the large-scale sand-dust environment ground simulation test system applicable to the environmental adaptability and reliability verification of aerospace electromechanical products is studied. The gas-solid two-phase numerical simulation method is adopted, and the possible cyclone separation, inertial separation methods are used to study the separation efficiency and regularity technology, which provides a basis for the separation design and test of the sand-dust environment simulation of large electromechanical products.

A Parallel Simulation Method for Performance Analysis of GNSS

2014 ◽  
Vol 522-524 ◽  
pp. 1187-1191
Author(s):  
Hong Tao Hou ◽  
Qun Li ◽  
Chao Wang ◽  
Qiang Chang ◽  
Wei Ping Wang
Keyword(s):  
Performance Analysis ◽  
Large Scale ◽  
Complex Structure ◽  
Model Development ◽  
Simulation Method ◽  
Satellite System ◽  
Parallel Simulation ◽  
Engineering System ◽  
Service Oriented ◽  
Global Navigation Satellite

In this paper, we proposed a parallel simulation method for performance analysis of the Global Navigation Satellite System (GNSS) based on simulation model portability 2(SMP2) and service-oriented modeling method. GNSS is a space engineering system with a large-scale and complex structure, and the proposed method can be used to construct large complex simulation systems to gain the reusability, composability and interoperability of heterogeneous simulation resources. Firstly, the method including the conceptual framework, system architecture and system engineering process is introduced. Then the parallel model development, composition and schedule method are detailed respectively. Finally, a distributed M&S environment based on service-oriented SMP2 is designed, and an example of navigation system volume simulation is given to validate the whole method.

scholarly journals In Silico Comprehensive Study for Finding Potential Anti Biofilm Inhibiting Phyto-Chemical by Homology Modeling, Virtual Screening, Docking and Molecular Dynamics Simulation

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Ashutosh Nayak
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Biofilm Formation ◽  
Large Scale ◽  
Experimental Validation ◽  
Low Cost ◽  
Dynamics Simulation ◽  
Essential Requirement ◽  
Self Defense ◽  
Comprehensive Study

Biofilm is an essential requirement of microbes for its propagation and it helps in self-defense against antibiotics and adverse environmental factors. But a boon for bacteria has unfavorable economic and health implications on humans. The sheer scale of biofilm formation makes it very difficult for a prepared industrial inhibitor to be economically feasible. This is where Phyto-chemicals can be used as a potential inhibitor because of its low cost of production and easy availability to be used on such a large scale. In this study, we aim to find a potential Phyto-chemical ligand for a Cellulose synthesizing protein BcsF for Salmonella typhimurium (strain LT2 / SGSC1412) which is one of the leading species of microbe that responsible for a biofilm-forming matrix. By screening antibacterial Phyto-chemical against our protein, we found that Procyanidin (Pubchem id 124017) had the least binding energy, which can be taken as a probable anti-biofilm agent for experimental validation.

The solid phase thermal decomposition and nanocrystal effect of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) via ReaxFF large-scale molecular dynamics simulation

2019 ◽  
Vol 21 (31) ◽  
pp. 17240-17252 ◽  
Author(s):  
Ke Zheng ◽  
Yushi Wen ◽  
Bing Huang ◽  
Jun Wang ◽  
Jin Chen ◽  
...  
Keyword(s):  
Shock Wave ◽  
Molecular Dynamics ◽  
Thermal Decomposition ◽  
Molecular Dynamics Simulation ◽  
Large Scale ◽  
Solid Phase ◽  
Wave Action ◽  
Combustion Reaction ◽  
Dynamics Simulation

The solid phase thermal decomposition and nanocrystal effect are extremely important to understand the ignition, combustion, reaction growth and buildup to detonation under shock wave action.

An Algorithm for Large-Scale Terrain Generation Based on Quadtree

2013 ◽  
Vol 446-447 ◽  
pp. 946-950
Author(s):  
Nai Mei Fan ◽  
Zhi Feng Zhang
Keyword(s):  
Data Storage ◽  
Large Scale ◽  
Model Generation ◽  
Test Results ◽  
Storage Test ◽  
Evaluation Standards ◽  
Terrain Model ◽  
Static Data ◽  
Real Time Visualization ◽  
Terrain Generation

The paper puts forward an algorithm for multi-resolution terrain model generation based on quadtree. This algorithm puts elements as view-dependent and terrain relief into the evaluation standards for level of detail and raises appropriate methods to remove cracks in the course of terrain generation according to the law of node partition and rendering. In drawing terrain, optimized display technologies as frustum culling, backface culling, triangle fan and static data storage. Test results show, this algorithm can realize the real-time visualization of large-scale terrain.

Trends and Challenges in Large-Scale HPC Network Analysis

2018 ◽  
pp. 144-170
Keyword(s):  
Network Analysis ◽  
Data Storage ◽  
Large Scale ◽  
Low Cost ◽  
Parallel Architectures ◽  
The Other ◽  
Graph Analysis ◽  
New Wave ◽  
Graph Analytics ◽  
Massively Parallel Architectures

Many algorithms in graph analytics can be sped up by using the power of low-cost but massively parallel architectures, such as GPUs. On the other hand, the storage and analysis capabilities needed for large-scale graph analytics have motivated the development of a new wave of HPC technologies, including MapReduce-like BSP distributed analytics, No-SQL data storage and querying, and homogeneous and hybrid multi-core/GPU graph supercomputing. In this chapter, the authors review these trends and current challenges for HPC large-scale graph analysis.

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