检索结果-内蒙古大学图书馆

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： R. J. Aliaga V. Herrero-Bosch S. Capra J. A. Dueñas A. Pullia A. Gadea D. Mengoni Instituto de Fisica Corpuscular (CSIC-UV) Paterna Spain Instituto de Instrumentación para Imagen Molecular (13M) Universidad Politécnica de Valencia Valencia Spain Istituto Nazionale di Fisica Nucleare - Sez Milano Italy Departamento de Física Aplicada FCCEE Universidad de Huelva Huelva Spain Dipartimento di Fisica e Astronomia Università di Padova Padova Italy

The readout system for the new TRACE detector requires monitorization and sampling of all pulses in a large number of channels with very strict space and power consumption restrictions for the front-end electronics and cabling. A triggerless solution has been chosen involving front-end analog memories that sample a 1 μs window of the waveform of any valid pulses at 200 MHz while performing zero suppression and serialization tasks. An analog memory ASIC named PLAS (for PipeLined Asymmetric SCA) is presented that allows pulse capture with no dead time in any channel while reducing die area requirements for high input channel counts. The circuit is based on a novel architecture where the typical Switched Capacitor Array (SCA) structure is partitioned into two asymmetric stages and FIFO queue-like control circuitry is introduced for captured data. The ASIC has been designed in 0.18 μm CMOS technology with 32 independent, self-triggered input channels and a size of 3.5 × 3.9mm 2 . Simulations predict figures around 100MHz bandwidth, 12 ENOB and 10 mW per channel.

关键词： Detectors Capacitors Computer architecture Microprocessors programmable logic arrays Analog memory Switches

来源：评论

学校读者我要写书评

暂无评论

Biofunctionalization of polymeric surfaces

Biofunctionalization of polymeric surfaces

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Miguel A. Mateos-Timoneda Riccardo Levato Xavier Puñet Irene Cano Oscar Castano Elisabeth Engel CIBER-BBN the Department of Material Science and Metallurgy of the Technical University of Catalonia and the Institute for Bioengineering of Catalonia (IBEC) C/ Baldiri Reixac 15 08028 Barcelona Spain The IBEC and the CIBER-BBN Spain Department of Material Science and Metallurgy of the Technical University of Catalonia Barcelona Spain

Most of the synthetic polymeric biomaterials used for biomedical applications lack of functional groups able to specifically instruct cells to unlock their potential for tissue regeneration. Surface modification strategies are able to overcome this limitation by introducing bioactive cues. In this study, several functionalization approaches are analyzed. Wet chemical methods such as controlled hydrolysis of polyesters followed by biomolecules grafting by carbodiimide chemistry are simple and versatile approaches, able to succesfully improve the bioactivity of devices with virtually any architecture. Grafting of short peptides, extracellular matrix proteins (ECM) or engineered protein-like recombinamers are promising techniques to improve cell adhesion to biomaterials, including polylactic acid (PLA) and its derivatives. ECM molecules and recombinamers can present more effectively bioactive signals, even in presence of competing, nonadhesive serum proteins. Besides adhesion, surface modifications intended to improve cell attachment, play a role on other cell responses, such as migratory potential. Collagen coating were shown to enhance the expression of the migratory receptor CXCR4 in mesenchymal stromal cells, when compared to short RGD peptides, while the modality of functionalization (covalent vs. physisorbed) tuned the rate of cell migration from PLA-based microcarriers. This multiple effects have to be taken into account when designing biomaterials for cell delivery and tissue engineering. Furthermore, as we aim to recapitulate in vitro the complexity of native tissues, alternative strategies based on the generation of decellularized polymer scaffold rich in cell-deposited ECM are proposed.

关键词： programmable logic arrays Proteins Peptides Adhesives Electronic countermeasures Polymers Films

来源：评论

学校读者我要写书评

暂无评论

Dynamic analysis of a single link flexible manipulator using Lagrangian-assumed modes approach

Dynamic analysis of a single link flexible manipulator using...

引用

International Conference on Industrial Instrumentation and Control (ICIC)

作者： Natraj Mishra S.P. Singh B.C. Nakra UPES Dehradun India Department of Mechanical Engineering IIT Delhi India

ISBN: (纸本)9781479971664

In the present work, a dynamic model of a single link flexible manipulator is obtained using the Lagrangian-assumed modes method. Two equations are obtained which need to be recursively solved. First equation gives the relationship between the joint torque and the joint variable. The second equation is a differential equation that is used to find out the elastic displacement of the link. This differential equation is different from the standard Euler-Bernoulli beam equation and is non-linear. The effect of joint variable on the elastic displacement is considered. An analytical approach is given to obtain the solution of the differential equation. The response of the single link flexible manipulator system is obtained under a step torque input. Validation of the mathematical model is also done.

关键词： Mathematical model programmable logic arrays Manipulators Torque measurement Torque Silicon compounds

来源：评论

学校读者我要写书评

暂无评论

Diabetes mellitus prediction system evaluation using C4.5 rules and partial tree

Diabetes mellitus prediction system evaluation using C4.5 ru...

引用

International Conference on Reliability, Infocom Technologies and Optimization (ICRITO) (Trends and Future Directions)

作者： Purushottam Kanak Saxena Richa Sharma Amity University Naida S.A.T.I. Vidisha M.P

Diabetes disease prediction is a progressive area of research in the healthcare Sector. Although many data mining techniques have been employed to assess the main causes of diabetes, but only few sets of clinical risk factors are considered. Due to this, some important factors like pre-diabetes health conditions are not considered in their analysis. So the results produced by such techniques may not represent appropriate diabetes pattern and risk factors appropriately.

关键词： Diabetes Skin programmable logic arrays Data mining Sugar Diseases Classification algorithms

来源：评论

学校读者我要写书评

暂无评论

Discussion on the Solution of Quantum Hydrodynamic Model for Semiconductors

Discussion on the Solution of Quantum Hydrodynamic Model for...

引用

IEEE International Symposium on Information (IT) in Medicine and Education, ITME

作者： Lei Mao Bingyu Kou Yan Zhang Gui Zhang Institute of Science PLA University of Science and Technology Nanjing China

A class of quantum hydrodynamic model of steady-state bipolar semiconductor equation with viscous term is discussed in this paper. This model contains third-order quantum correction and second order viscous term. There is little discussion on the bipolar model. This paper considers a class of bipolar quantum hydrodynamics equations with a special viscous term. We prove that, in the case of isothermal or isentropic, the equations have a positive solution for all current density.

关键词： Semiconductor device modeling Hydrodynamics Mathematical model programmable logic arrays Quantum mechanics Steady-state Boundary conditions

来源：评论

学校读者我要写书评

暂无评论

Properties of Polylactide Inks for Solvent-Cast Printing of Three-Dimensional Freeform Microstructures

引用

LANGMUIR 2014年第4期30卷 1142-1150页

作者： Guo, Shuang-Zhuang Heuzey, Marie-Claude Therriault, Daniel Ecole Polytech Ctr Appl Res Polymers & Composites CREPEC Dept Mech Engn Lab Multiscale Mech Montreal PQ H3C 3A7 Canada Ecole Polytech Ctr Appl Res Polymers & Composites CREPEC Dept Chem Engn Montreal PQ H3C 3A7 Canada

Solvent-cast printing is a highly versatile microfabrication technique that can be used to construct various geometries such as filaments, towers, scaffolds, and freeform circular spirals by the robotic deposition of a polymer solution ink onto a moving stage. In this work, we have performed a comprehensive characterization of the solvent-cast printing process using polylactide (PLA) solutions by analyzing the flow behavior of the solutions, the solvent evaporation kinetics, and the effect of process-related parameters on the crystallization of the extruded filaments. Rotational rheometry at low to moderate shear rates showed a nearly Newtonian behavior of the PLA solutions, while capillary flow analysis based on process-related data indicated shear thinning at high shear rates. Solvent vaporization tests suggested that the internal diffusion of the solvent through the filaments controlled the solvent removal of the extrudates. Different kinds of three-dimensional (3D) structures including a layer-by-layer tower, nine-layer scaffold, and freeform spiral were fabricated, and a processing map was given to show the proper ranges of process-related parameters (i.e., polymer content, applied pressure, nozzle diameter, and robot velocity) for the different geometries. The results of differential scanning calorimetry revealed that slow solvent evaporation could increase the ability of PLA to complete its crystallization process during the filament drying stage. The method developed here offers a new perspective for manufacturing complex structures from polymer solutions and provides guidelines to optimize the various parameters for 3D geometry fabrication.

关键词： Properties Polylactide Inks Solvent-Cast Printing Filaments Printing solvent removal Plasticizers SOLVENT EVAPORATION flow behavior Solvents RATE OF SHEAR complex structure programmable logic arrays Ink Polymer solutions shear thinning Polylactides scaffolds

来源：评论

学校读者我要写书评

暂无评论

Investigating mechanical performance of PLA and CA biodegradable printed circuit boards

Investigating mechanical performance of PLA and CA biodegrad...

引用

International Symposium for Design and Technology of Electronics Packages (SIITME)

作者： Attila Géczy Dániel Nagy István Hajdu Ákos Kmetty Beáta Szolnoki Department of Electronics Technology Budapest University of Technology and Economics (BME) Budapest Hungary Department of Polymer Engineering Budapest University of Technology and Economics (BME) Budapest Hungary Department of Organic Chemistry and Technology Budapest University of Technology and Economics (BME) Budapest Hungary

The paper presents a set of experiments investigating the mechanical performance of PCBs manufactured from biodegradable, sustainable polymers, compared to conventional materials. Cellulose Acetate (CA), Polylactic Acid (PLA) and Flame-Retardant Class 4 (FR-4) substrates were compared during the experiments. The methods involved dynamic mechanical analysis (DMA), three-point bending tests and UL 94 flammability tests. Preliminary results show that the overall performance of the basic biodegradable, sustainable PCBs are considerably weaker compared to FR4 boards, however further improvements with additives and use in special applications can point to practical purposes of the substrates.

关键词： programmable logic arrays Performance evaluation Substrates Fixtures Soldering

来源：评论

学校读者我要写书评

暂无评论

Bacteria Sterilization by Laser Ablation Plasma Using Several Metal Target

Bacteria Sterilization by Laser Ablation Plasma Using Severa...

引用

IIAI International Conference on Advanced Applied Informatics (IIAIAAI)

作者： Hiroharu Kawasaki Tamiko Ohshima Yoshihito Yagyu Takeshi Ihara Yoshiaki Suda Electronics and Electrical Engineering National Institute of Technology Sasebo Japan

ISBN: (纸本)9781479999590

Effects of pulsed laser ablation (PLA) plasma on sterilization have been studied using thin film deposition system. Yeast fungus and Spore-forming bacteria were used as the subject of sterilization, and Silver (Ag) was used as PLA target in this experiment. Experimental results suggest both of Yeast fungus and Spore-forming bacteria can be sterilization by PLA plasma irradiation. The effect of the sterilization strongly depends on the laser fluence and irradiation time. As the optical emission spectra, it is considered that main sterilization factors are high energy Ag atoms and ions, and shock wave.

关键词： programmable logic arrays Microorganisms Substrates Yttrium Radiation effects Plasma temperature

来源：评论

学校读者我要写书评

暂无评论

Relaxation processes in spatially homogenous plasma with account for quadratic terms

Relaxation processes in spatially homogenous plasma with acc...

引用

International Young Scientists Forum on Applied Physics (YSF)

作者： V. N. Gorev A. I. Sokolovsky Department of Theoretical Physics Oles Honchar Dnipropetrovsk National University Dnipropetrovsk Urkaine

Properties of a completely ionized two-component spatially homogenous electron-ion plasma are investigated on the basis of the Landau kinetic equation. The generalization is made on the basis of a generalized Chapman-Enskog method, which allows us to investigate the temperature and velocity relaxation. Our previous works are devoted to the obtaining of corrections of higher orders in the small electron-to-ion mass ratio to the results of the local equilibrium assumption (LEA) in the framework of the linear relaxation. This work is devoted to the investigation of quadratic terms in small relaxation parameters. At some stage of the system evolution the leading order in the mass ratio of such terms gives a contribution to the plasma component distribution functions (CDF) and to the temperature and velocity relaxation rates which can be comparable with the above-mentioned corrections in the framework of the linear relaxation.

关键词： Kinetic theory Ions programmable logic arrays

来源：评论

学校读者我要写书评

暂无评论

Initial Evidence for Understanding the Relationship between Product Line Architecture and Software Architecture Recovery

Initial Evidence for Understanding the Relationship between ...

引用

Brazilian Symposium on Software Components, Architectures and Reuse (SBCARS)

作者： Crescencio Rodrigues Lima Neto Mateus Passos Soares Cardoso Christina Von Flach Garcia Chavez Eduardo Santana De Almeida Federal Institute for Education Science and Technology of Bahia (IFBA) Federal University of Bahia (DCC/UFBA)

Context: Over the years, the interest on software architecture recovery has increased. Due to software product line inherent complexity, the recovery of product line architecture is crucial to alleviate difficulties and enable benefits during the SPL development. Objective: In order to gather data and evidence about the relationship between product line architecture and software architecture recovery, (Method:) we performed a literature survey using some steps of systematic literature review method and an exploratory study. Results: We identified the appearance of more elaborated studies over the years and the majority of solution proposals are used to recover the architecture from legacy systems source code to provide the SPL reference architecture. Conclusion: Most of the studies presented solution proposal combined with case studies. But, only a few of them address empirical evaluation. With the software architecture recovery evolution, more research combining recovery of product line architecture and empirical evaluation still necessary.

关键词： Computer architecture Software architecture programmable logic arrays Proposals Market research Data mining Software product lines

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：