Results 61 to 70 of about 546,944 (323)

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel   +6 more
wiley   +1 more source

Точностные характеристики коротких краскопечатных систем с кратными цилиндрами [PDF]

open access: yes, 2012
Розглядається задача аналітичного визначення і побудови точностної характеристики короткої фарбодрукарської системи з кратними циліндрами для заданого інтервалу тонопередачі, приведені результати комп’ютерного симулювання.The article deals with the ...
Pushkar, A. V., Пушкар, А. В.
core  

Structure and Dynamics of Information Pathways in Online Media

open access: yes, 2012
Diffusion of information, spread of rumors and infectious diseases are all instances of stochastic processes that occur over the edges of an underlying network.
Leskovec, Jure   +2 more
core   +1 more source

An energy scaled and expanded vector-based forwarding scheme for industrial underwater acoustic sensor networks with sink mobility [PDF]

open access: yes, 2017
Industrial Underwater Acoustic Sensor Networks (IUASNs) come with intrinsic challenges like long propagation delay, small bandwidth, large energy consumption, three-dimensional deployment, and high deployment and battery replacement cost.
Alabed, Mohamad Souheil   +6 more
core   +3 more sources

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

open access: yesAdvanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner   +22 more
wiley   +1 more source

天文望远镜传动直齿轮齿廓修形设计

open access: yesJixie chuandong, 2010
Adopted high-order power function and short modification as the profile modification mode of spur gears used in astronomical telescopes,it can meet the necessity of the contact ratio and improve the static transmission error,and avoid stress ...
冯锦平, 马文礼
doaj  

Full-Rate, Full-Diversity, Finite Feedback Space-Time Schemes with Minimum Feedback and Transmission Duration

open access: yes, 2012
In this paper a MIMO quasi static block fading channel with finite N-ary delay-free, noise-free feedback is considered. The transmitter uses a set of N Space-Time Block Codes (STBCs), one corresponding to each of the N possible feedback values, to encode
Natarajan, Lakshmi Prasad   +1 more
core   +1 more source

Green communication via Type-I ARQ: Finite block-length analysis [PDF]

open access: yes, 2014
This paper studies the effect of optimal power allocation on the performance of communication systems utilizing automatic repeat request (ARQ). Considering Type-I ARQ, the problem is cast as the minimization of the outage probability subject to an ...
Makki, Behrooz   +2 more
core   +2 more sources

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

open access: yesAdvanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie   +4 more
wiley   +1 more source

Dynamics Characteristic Analysis of a Spur Gear based on Measured Tooth Surface Error

open access: yesJixie chuandong, 2018
Gear tooth surface error is main excitation source of vibration and noise in gear system. In order to study the influence of tooth surface error on gear system,the static transmission error is calculated for gear system with measured errors such as ...
Chen Siyu, Bai Fan, Tang Jinyuan
doaj  

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