Results 131 to 140 of about 37,452 (297)

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

Polymer Engineering &Science, EarlyView.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan, Philip McMorran, Marwan Eid, Julia Blair, Amar K. Mohanty, Manjusri Misra   +5 more
wiley   +1 more source

A data-driven droop control strategy for reactive power sharing and stability enhancement in islanded AC microgrids

International Journal of Electrical Power & Energy Systems
In islanded microgrids, distributed generation (DG) units employing conventional droop control often exhibit significant mismatches in reactive power sharing. This issue primarily arises from the mismatches in line impedances. These inaccuracies not only
Adham Osama, Tarek H.M. EL-Fouly, Hatem H. Zeineldin, Ehab F. El-Saadany   +3 more
doaj   +1 more source

Process Window Optimization for Roll‐to‐Roll Slot‐Die Coating of High‐Resolution Dry Film Solder Resists for HDI PCB Applications

Polymer Engineering &Science, EarlyView.
A hydrodynamic process window for roll‐to‐roll slot‐die coating of photosensitive solder resist (PSR) was established by systematically varying the slot‐die gap and pump flow rate. Under the optimized conditions, a highly uniform 26 μm dry‐film solder resist (DFSR) layer with a thickness variation of ±3.74% was obtained without coating defects.
Geonu Kim, Woo Cheol Choi, Min Kwak, Jin Ho Shin, Jin Yong Seok, Ki‐Seok Jeon, Mincheol Chang, Chaehwan Jeong   +7 more
wiley   +1 more source

Droop control strategy in inverter‐based microgrids: A brief review on analysis and application in islanded mode of operation

IET Renewable Power Generation
Droop control is at the first level of the control hierarchy and does not require communication. Having high reliability, is usually used in inverter‐based microgrids.
Ghazanfar Shahgholian, Mohammadreza Moradian, Arman Fathollahi   +2 more
doaj   +1 more source

Control System for the Navigation of the Agricultural Robots: A Review

Journal of Field Robotics, EarlyView.
ABSTRACT Control systems for the navigation of autonomous agricultural robots—particularly those operating in uneven terrain and in the presence of static or dynamic obstacles—have advanced considerably in recent years. As conventional machinery evolves toward increasingly automated systems, the design of reliable navigation controllers has become ...
Edna Carolina Moriones Polanía, Hugo Rafacho Fernandes, Daniel Albiero, Angel Pontin Garcia   +3 more
wiley   +1 more source

Multi-segment droop control and optimal parameter setting strategy of wind turbine for frequency regulation

International Journal of Electrical Power & Energy Systems
Traditionally, virtual inertia is used as the control strategy for wind turbines when participating in frequency regulation. However, it has inherent defects in measurement error amplification due to the frequency differential.
Haishu Gao, Feng Zhang, Lei Ding, Bertrand Cornélusse, Gang Zhang, Athuman Salimu   +5 more
doaj   +1 more source

Data informed performance assessment and structural health monitoring for existing and historical concrete structures

Structural Concrete, EarlyView.
Abstract Our generation inherits this cultural heritage of historic material and historic reinforced concrete structures and thus bears a certain responsibility to preserve these historic buildings with the help of the new technologies of lifetime management, conservation concepts and the new digitalization as well as the emerging safety concepts of ...
A. Strauss
wiley   +1 more source

Impact of half‐joint failures on RC girder bridges: A robustness quantification study

Structural Concrete, EarlyView.
Abstract The robustness of bridge structures is critical to ensuring safety and service continuity, particularly in aging infrastructure exposed to degradation and unexpected loads. Reinforced concrete (RC) half‐joint bridges—widely built in Italy between the 1950s and 1970s—exhibit specific vulnerabilities due to inspection challenges, durability ...
Paolo Martinelli, Matteo Colombo
wiley   +1 more source

Pre‐failure behavior of continuous post‐tensioned and post‐grouted beam in case of tendon failure

Structural Concrete, EarlyView.
Abstract Grouted tendons are a common solution for long‐span bridge structures. The grout provides bond and corrosion protection for prestressing steel. However, if the grouting is defective, corrosion of the prestressing steel may initiate and eventually lead to tendon failure.
Olli Asp, Joonas Tulonen, Anssi Laaksonen   +2 more
wiley   +1 more source

High speed research system study. Advanced flight deck configuration effects [PDF]

In mid-1991 NASA contracted with industry to study the high-speed civil transport (HSCT) flight deck challenges and assess the benefits, prior to initiating their High Speed Research Program (HSRP) Phase 2 efforts, then scheduled for FY-93.
Goins, Richard T., Swink, Jay R.
core   +1 more source