Results 51 to 60 of about 85,109 (98)

A população do Brasil, 1570-1700: uma revisão historiográfica

, 2014
This article reviews the historiography of Brazil’s population estimates for the period from 1570 until the beginning of the 18th century, with special atten...
Angelo Alves Carrara
semanticscholar   +1 more source

Study on Self-Sharpening Mechanism and Polishing Performance of Triethylamine Alcohol on Gel Polishing Discs

Micromachines
To address the issue of surface glazing that occurs during prolonged polishing with gel tools, this study employs a triethanolamine (TEA)-based polishing fluid system to enhance the self-sharpening capability of the gel polishing disc.
Yang Lei, Lanxing Xu, Kaiping Feng
doaj   +1 more source

Memristor Emulator Circuits: Recent Advances in Design Methodologies, Healthcare Applications, and Future Prospects

Micromachines
Memristors, as the fourth fundamental circuit element, have attracted significant interest for their potential in analog signal processing, computing, and memory storage technologies.
Amel Neifar, Imen Barraj, Hassen Mestiri, Mohamed Masmoudi   +3 more
doaj   +1 more source

Study on Electrical Characteristics and ECG Signal Acquisition Performance of Fabric Electrodes Based on Organizational Structure and Wearing Pressure

Micromachines
Obtaining stable ECG signals under both static and dynamic conditions, while ensuring comfortable wear, is a prerequisite for fabric-electrode applications.
Ming Wang, Jinli Zhou, Ge Zhang
doaj   +1 more source

Design of an Angled Single-Excitation Elliptical Vibration System

Micromachines
An angled single-excitation elliptical vibration system for ultrasonic-assisted machining was developed in this paper, which was composed of a giant magnetostrictive transducer and an angled horn.
Qiang Liu, Xiping He, Weiguo Wang, Yanning Yang   +3 more
doaj   +1 more source

Development of LPFG-Based Seawater Concentration Monitoring Sensors Packaged by BFRP

Micromachines
Leveraging the sensitivity of long-period fiber grating (LPFG) to changes in the environmental refractive index, an LPFG-based seawater concentration monitoring sensor is proposed. Considering the highly saltine and alkali characteristics of the sensor’s
Zhe Zhang, Tongchun Qin, Yuping Bao, Jianping He   +3 more
doaj   +1 more source

Novel Debris Material Identification Method Based on Impedance Microsensor

Micromachines
Oil condition monitoring can ensure the safe operation of mechanical equipment. Metal debris is full of friction information, and the identification of debris material helps to locate wear of parts.
Haotian Shi, Yucai Xie, Hongpeng Zhang
doaj   +1 more source

Photonics on a Budget: Low-Cost Polymer Sensors for a Smarter World

Micromachines
Polymer-based photonic sensors are emerging as cost-effective, scalable alternatives to conventional silicon and glass photonic platforms, offering unique advantages in flexibility, functionality, and manufacturability.
Muhammad A. Butt
doaj   +1 more source

Understanding the Nanoindentation Edge Effect of Single-Crystal Silicon Using Molecular Dynamics Simulations

Micromachines
The edge effect refers to what occurs when an object undergoes elastic contact with the edge of a material. This is common in practical applications, but the understanding of this phenomenon is not yet mature enough, and understanding the microscopic ...
Chao Long, Ruihan Li, Pengyue Zhao, Ziteng Li, Shuhao Kang, Duo Li, Huan Liu   +6 more
doaj   +1 more source

Research on Modification Technology of Laser Cladding Stellite6/Cu Composite Coating on the Surface of 316L Stainless Steel Plow Teeth

Micromachines
Plow loosening machines are essential agricultural machinery in the agricultural production process. Improving the surface strengthening process and extending the working life of the plow teeth of the plow loosening machine are of great significance.
Wenhua Wang, Qilang He, Wenqing Shi, Weina Wu   +3 more
doaj   +1 more source