检索结果-内蒙古大学图书馆

arXiv 2019年

作者： Lee, Hyekyung Alizadeh, Shima Kim, Tae Jin Park, Seung-min Soh, Hyongsok Tom Mani, Ali Kim, Sung Jae Department of Electrical and Computer Engineering Seoul National University Seoul08826 Korea Republic of Department of Mechanical Engineering Stanford University Stanford94305 United States Department of Radiation Oncology Stanford University Stanford94305 United States Department of Radiology Stanford University Stanford94305 United States Department of Electrical Engineering Stanford University Stanford94305 United States Nano System Institute Seoul National University Seoul08826 Korea Republic of Inter-university Semiconductor Research Center Seoul National University Seoul08826 Korea Republic of

Overlimiting current (OLC) through electrolytes interfaced with perm-selective membranes has been extensively researched in recent years for understanding the fundamental mechanisms of transport and developing efficient applications from electrochemistry to sample analysis and separation. Predominant mechanisms responsible for OLC include surface conduction, convection by electro-osmotic flow, and electro-osmotic instability depending on input parameters such as surface charge and geometric constrictions. This work studies how a network of microchannels in a non-uniform array, which mimicks a natural pore configuration, can contribute to OLC. To this end, micro/nanofluidic devices are fabricated with arrays of parallel microchannels with non-uniform size distributions. All cases maintain the same surface and bulk conduction to allow probing the sensitivity only by the non-uniformity of the channels. Both experimental and theoretical current-voltage relations demonstrate that OLCs increase with increasing non-uniformity. Furthermore, the visualization of internal recirculating flows indicates that the non-uniform arrays induce flow loops across the network enhancing advective transport. These evidences confirm a new driving mechanism of OLC, inspired by natural micro/nanoporous materials with random geometric structure. Therefore, this result can advance not only the fundamental understanding of nanoelectrokinetics but also the design rule of engineering applications of electrochemical membrane. Copyright © 2019, The Authors. All rights reserved.

关键词： Electroosmosis

来源：评论

学校读者我要写书评

暂无评论

Uniaxial stretch-induced axonal injury thresholds for axonal dysfunction and disruption and strain rate effects on thresholds for mouse neuronal stem cells

引用

Journal of Biomechanical Science and engineering 2017年第1期12卷 16-00598-16-00598页

作者： Kurtoglu, Evrim Nakadate, Hiromichi Kikuta, Kazuhiro Aomura, Shigeru Kakuta, Akira Graduate School of System Design Tokyo Metropolitan University Tokyo Japan Advanced Course of Mechanical and Computer Systems Engineering Tokyo National College of Technology 1220-2 Kunugida-machi Hachioji-shi Tokyo193-0997 Japan

In this paper, the proposed study aims to achieve a better understanding of neuronal tolerance and contribute to the prediction of the secondary degeneration of diffuse axonal injury (DAI). Therefore, a uniaxial stretching device which subjected cultured neurons to uniaxial stretch was employed to evaluate the effect of strain and strain rate along axon to realize the injury threshold. Neurons differentiated from mouse neuronal stem cells were injured and the morphology was observed before and after stretching with strains of 0.10, 0.12, 0.18, 0.23 at strain rates of 8, 11, 19, 26 s-1 respectively. Results suggest that the threshold for axonal dysfunction is around 0.18 strain whereas the threshold for axonal disruption is around 0.23 and the results of strain rate effect investigations on axonal dysfunction and disruption around these threshold values indicated that higher strain rate values such as 50 s-1 may have diminishing effects on threshold for axonal disruption. © 2017 The Japan Society of mechanical Engineers.

关键词： Stem cells

来源：评论

学校读者我要写书评

暂无评论

Probabilistic Security Risk Assessment of systems Subject to Sequential Attacks

Probabilistic Security Risk Assessment of Systems Subject to...

引用

International Conference on Reliability, Maintainability and Safety,ICRMS

作者： Qisi Liu Liudong Xing Chengcheng Zhou Yujie Wang Department of Electrical and Computer Engineering University of Massachusetts – Dartmouth North Dartmouth USA Department of Software and Information System University of North Carolina Charlotte USA School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9781538670774;9781538670767

One of the biggest challenges during the overall promotion of computer industry is the security risk issue. Most of the existing approaches for quantifying security risks are based on simple multiplications of frequencies and quantitative consequences of hazard occurrence without considering dependencies among the hazards. In this paper, we model sequential attacks, which involve multiple sequence-dependent hazardous actions for a successful attack. We also explore a Markov-based method to estimate the occurrence probability of security risks for systems subject to the sequential attacks. The method is demonstrated through a detailed case study where Trojan attacks in the banking application are modeled and analyzed.

关键词： Trojan horses computer viruses computer hacking Risk management Logic gates Banking

来源：评论

学校读者我要写书评

暂无评论

A Fluid-Filled Tubular Dielectric Elastomer Variable Stiffness Structure Inspired by the Hydrostatic Skeleton Principle

A Fluid-Filled Tubular Dielectric Elastomer Variable Stiffne...

引用

IEEE International Conference on Robotics and Automation

作者： Tao Wang Yue Li Yuanjie Li Jinhua Zhang Jun Hong Michael Yu Wang Key Laboratory of Education Ministry for Modern Design & Rotor-Bearing System Xi'an Jiaotong University Xi'an Shaanxi China Department of Mechanical and Aerospace Engineering & Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Kowloon Hong Kong

This work presents a novel variable stiffness structure consisting of a fiber-constrained dielectric elastomer tube filled with insulating oil. The tensile stiffness of the structure can be adjusted by voltages and its initial value can be customized according to the initial pre-stretch of the material. The structure has a dimension of ～30 mm diameter ×50 mm length. A mathematical analysis is established to predict the initial tensile stiffness of the structure. The changes of the tensile stiffness of the structure under voltages are verified experimentally. The results show a decrease of the tensile stiffness of the device by 25% at 4 kV and the decrement is also related to the elongation of the structure. With different pre-stretches and dimensions of the dielectric elastomer, one can obtain devices with different variation ranges of tensile stiffness.

关键词： Electron tubes Strain Oils Muscles Hydraulic systems Force Soft robotics

来源：评论

学校读者我要写书评

暂无评论

Suture Maps Based on Structural Enhanced Imaging Endoscope for Laparoscopic Robotic Surgery

Suture Maps Based on Structural Enhanced Imaging Endoscope f...

引用

Conference on Lasers and Electro-Optics

作者： Hanh N. D. Le Shuwen Wei Simon Leonard Justin Opfermann Axel Krieger Jin U. Kang Department of Electrical and Computer Engineering Johns Hopkins University Baltimore MD Department of Computer Science Johns Hopkins University Baltimore MD Sheikh Zayed Institute for Pediatric Surgical Innovation Children's National Health System Washington DC Department of Mechanical Engineering University of Maryland College Park MD

A detection method for cutting scheme in 3D is proposed to assist robotic surgical manipulation, leading to an automatic suturing suggestion mapping.

ISBN: (纸本)9781538657331;9781943580422

A detection method for cutting scheme in 3D is proposed to assist robotic surgical manipulation, leading to an automatic suturing suggestion mapping.

关键词： Three-dimensional displays Image edge detection Endoscopes Robots Kidney Shape Surgery"

来源：评论

学校读者我要写书评

暂无评论

Multiscale spectral subtraction method and support vector machine for clustering heavy background noise classification 24

Multiscale spectral subtraction method and support vector ma...

引用

24th International Congress on Sound and Vibration, ICSV 2017

作者： Tsai, Yu-Ting Huang, Jin H. Feng Chia University Bachelor's Program in Precision System Design Taichung Taiwan Feng Chia University Department of Mechanical and Computer-Aided Engineering Taichung Taiwan

For measuring the rotation engine vibration signals, the mechanical or acoustical sensors are dif-ficult to get the clean signals from the heavy background noise of the machinery environment. The noise reduction algorithm may anticipate to decrease the background noise without disturbing the unpolluted signal. The spectral subtraction methods for noise attenuation case are reached for many years due to its simple and effectively. In this paper, the proposed algorithm incorporates the multiscale spectral subtraction method (MSS) with voice activity detector (VAD) and sup-ports vector machine (SVM) for removing the background noise, since SVM can be required for distinguishing a multivariate signal into separated subcomponents. From the analysis case for the rotating machinery, MSS shows that the low frequency with their harmonics frequencies can be tracked through the clustering of the data from SVM. The present method is helpful in background noise and signal compartmentalization as its application can significantly lower the requirement for labelled training cases in both the inductive noise and wanted signals.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

Effect of pretreatment of substrate on synthesized diamond films on Tungsten Carbide substrate by flame combustion

引用

Procedia Manufacturing 2017年 13卷 21-28页

作者： Takahashi, M. Kamiya, O. Pasang, T. Department of System Design Engineering Faculty of Engineering Science Akita University 1-1 Tegatagakuen-machi Akita 010-8502 Japan Mechanical Engineering School of Engineering Computer & Mathematical Science Auckland University of Technology 34 St Paul Street Auckland 1020 New Zealand

A flame combustion method enables the synthesis of diamond using acetylene-oxygen gas flame combustion in ambient air. Recently, tungsten carbide (WC) has been used as cutting tools in the machining industry. To obtain diamond films and to achieve good adhesion on the WC substrate, diamond films were synthesized by flame combustion method. However, synthesized diamond films delaminate as a result of thermal stress during cooling. In this study, as a pretreatment of the substrate to prevent the delamination, a chemical processing was performed. The WC substrate was pretreated by chemical etching to roughen the surface. The substrate was etched in an ultrasonic bath using Murakami's reagent. Another processing was performed using an acid solution of hydrogen peroxide, in order to remove cobalt from the substrate surface. The pretreatment periods were varied. Moreover, the effect of the pretreatment of the substrate on synthesized diamond films by flame combustion was investigated. © 2017 The Author(s)

关键词： Diamond films Flame combustion Pretreatment of substrate Tungsten carbide

来源：评论

学校读者我要写书评

暂无评论

IAC-17.B4.9-GTS.5.8: Design and development of a three-axis controlled helmholtz cage as an in-house magnetic field simulator for cubesats 68

IAC-17.B4.9-GTS.5.8: Design and development of a three-axis ...

引用

68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017

作者： Goyal, Tushar Batta, Karabee Baranwal, Prerna Awais, Ahmed N.A. More, Niharika Panigrahi, Rudrakh Kaushik, Tushar -Pilani 333031 India Department of Computer Science and Information System BITS Pilani 333031 India Department of Mechanical Engineering BITS Pilani 333031 India Department of Civil Engineering BITS Pilani 333031 India

ISBN: (纸本)9781510855373

Team Anant is the University Student Satellite Team of Birla Institute of Technology and Science, Pilani, India. The paper presents the details of the design and in-house development of a Three-axis Controlled Helmholtz Cage prepared by the members of the Team as an Attitude Determination and Control test bed for CubeSat type Nanosatellites. The testbed has been designed to provide a testing volume of approximately 90 dm3 with uniform magnetic field, which is sufficient to test nanosatellites of up to 3U Size (CalPoly Standard). The maximum designed magnetic field intensity for each coil is 120 iT. The cage has been designed so as to simulate the magnetic field over the entire range of Low Earth Orbits. The paper begins from the very basic coil design requirements with brief analysis of the dimensional requirements and materials to be used. The analysis is complemented with a budget optimization model for a cost-effective setup. The cage has an unconventional but improvised Square-Coil design. The methodology applied for the structure design and assembly of the cage has been presented in a thorough manner. Brief information about the internal and external, software and hardware connections has been provided. All other relevant information has been presented to provide a step by step guide for the development of the cage. Aluminum Square Pipes and Aluminum Flats were used to prepare the structure of the Cage supplemented by Copper Wire for the production of the field. MATLAB is used to determine the Magnetic Field Intensities along the orbit which are then translated in real time to current intensities on the three pair of Coils. A brief assessment of the circuitry used for producing the required currents is also presented. The system is able to perform as expected in common configurations and is able to produce the desirable field in all three axes. The paper concludes with the experimental data obtained during the preliminary testing of the structure of the cage. ©

关键词： Magnetic fields

来源：评论

学校读者我要写书评

暂无评论

Data Mining: The Classification Method to Predict the Types of Motorcycle Spare Parts to be Restocked

引用

IOP Conference Series: Materials Science and engineering 2019年第2期662卷

作者： S L B Ginting Y R Ginting Sutono A Rakhman Computer System Study Program Faculty of Engineering and Computer Science Universitas Komputer Indonesia Jl. Dipati Ukur 112-116 Bandung 40132 Indonesia Department of Mechanical Engineering Universitas Riau Kampus Bina Widya KM 12 5 Simpang Baru Pekanbaru 28293 Indonesia

The research intends to create an application which is able to analyse sales data in a motorcycle company to predict the types of spare parts which should be stocked. This prediction is crucial since problems are often encountered while restocking. For instance, when there have been some imprecisions occurring in deciding regarding the types of spare parts to restock, the spare parts accumulate. It can cause inefficiency in terms of storage, the products quality deteriorates due to having been stored for too long, and sometimes the best-selling products are not available in the warehouse. This application is developed with Naïve Bayes Classifier (NBC) method which has a high accuracy in predicting future occurrences. This method works by calculating the probability value in each attribute class and determining the optimal probability value. From the test results, 4500 training data with 200 sample test data has 90% similarity with the results of the restock decision without application. For 500 test data, the similarity was 96%. It is proven that this method has a high accuracy so that it can help the decision makers solved the company problem in predicting the types of motorcycle parts to be restocked.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Wireless multilateral devices for optogenetic studies of individual and social behaviors

引用

Nature neuroscience 2022年第10期25卷 1394页

作者： Yiyuan Yang Mingzheng Wu Abraham Vázquez-Guardado Amy J Wegener Jose G Grajales-Reyes Yujun Deng Taoyi Wang Raudel Avila Justin A Moreno Samuel Minkowicz Vasin Dumrongprechachan Jungyup Lee Shuangyang Zhang Alex A Legaria Yuhang Ma Sunita Mehta Daniel Franklin Layne Hartman Wubin Bai Mengdi Han Hangbo Zhao Wei Lu Yongjoon Yu Xing Sheng Anthony Banks Xinge Yu Zoe R Donaldson Robert W Gereau Cameron H Good Zhaoqian Xie Yonggang Huang Yevgenia Kozorovitskiy John A Rogers Department of Mechanical Engineering Northwestern University Evanston IL USA. Department of Neurobiology Northwestern University Evanston IL USA. Center for Bio-Integrated Electronics Northwestern University Evanston IL USA. US Army Research Laboratory Aberdeen Proving Ground MD USA. US Army Medical Research Institute of Chemical Defense Aberdeen Proving Ground MD USA. Washington University Pain Center and Department of Anesthesiology Washington University St. Louis MO USA. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai China. Department of Civil and Environmental Engineering Northwestern University Evanston IL USA. Department of Materials Science and Engineering Northwestern University Evanston IL USA. Department of Physics Tsinghua University Beijing China. SURVICE Engineering Belcamp MD USA. Chemistry of Life Processes Institutes Northwestern University Evanston IL USA. Neurolux Inc Evanston IL USA. School of Civil Engineering Southwest JiaoTong University Chengdu China. School of Chemical Engineering and Technology Tianjin University Tianjin People's Republic of China. CSIR-Central Scientific Instruments Organization Ministry of Science & Technology Sector 30-C Chandigarh India. Department of Biomedical Engineering Northwestern University Evanston IL USA. Department of Electronic Engineering Tsinghua University Beijing China. Simpson Querrey Institute & Feinberg Medical School Northwestern University Evanston IL USA. Department of Biomedical Engineering City University of Hong Kong Kowloong Tong Hong Kong. Psychology and Neuroscience Molecular Cellular and Developmental Biology University of Colorado Boulder Boulder CO USA. State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics Dalian University of Technology Dalian P.R. China. zxie@***. Department of Mechanical Engineering Northwestern University Evanston IL USA. y-huang@northwest

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：