Results 41 to 50 of about 87,352 (306)

Mid-Course Trajectory Optimization for Short-Range Head-On Engagement via Sequential Convex Programming

open access: yesIEEE Access
If an aerial defense missile with a limited strapdown field-of-view (FOV) is launched with a restricted launch angle against an incoming target at high altitude, there are significant difficulties in establishing an appropriate collision course for head ...
Hyuck-Hoon Kwon   +3 more
doaj   +1 more source

PGM-Free Biomass-Derived Electrocatalysts for Oxygen Reduction in Energy Conversion Devices: Promising Materials

open access: yesElectrochemical Energy Reviews
Biomass is a low-cost, abundant and renewable resource that can be used to manufacture porous carbon-based materials for a variety of applications. Different mesoporous carbon supports can be obtained from the various synthetic approaches that are aimed ...
Stefano Zago   +3 more
semanticscholar   +1 more source

High Power Density PGM-Free Cathodes for Polymer Electrolyte Fuel Cells.

open access: yesACS Applied Materials and Interfaces, 2019
Low cost and high-performing platinum group metal-free (PGM-free) cathodes have the potential to transform the economics of polymer electrolyte fuel cell (PEFC) commercialization.
Aman Uddin   +5 more
semanticscholar   +1 more source

Coupling High-Throughput Experiments and Regression Algorithms to Optimize PGM-Free ORR Electrocatalyst Synthesis

open access: yes, 2020
Over the past decades, significant improvement has been achieved in the performance of platinum group metal-free (PGM-free) materials as an alternative to Pt-based electrocatalysts for oxygen reduc...
M. Karim   +8 more
semanticscholar   +1 more source

Anode Slime Gained During Electrolysis Process of Secondary Copper Anodes [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2019
The aim of this research is to get a better understanding of the electrolytic refining process in order to yield the anode slime. Three types of secondary copper anodes are electro refined in an electrolytic system, where the electrolyte is an acid of ...
Nurten Deva   +3 more
doaj  

Thiết kế vector tái tổ hợp để biểu hiện và cố định liên tục beta-mannanase trên bề mặt Lactobacillus plantarum WCFS1 sử dụng promoter thường trực Pgm

open access: yesTạp chí Khoa học và Công nghệ, 2023
Lactobacillus plantarum là một loại vi khuẩn sinh axit lactic quan trọng trong thực phẩm. Nhiều nghiên cứu đã báo cáo về hiệu quả sử dụng vi khuẩn này để tổng hợp enzyme tự do. Tuy nhiên, rất ít nghiên cứu về việc phát triển L. plantarum như chất mang an
Nguyễn Hoàng Minh, Nguyễn Thu Hà
doaj  

Large deviations of the empirical volume fraction for stationary Poisson grain models

open access: yes, 2005
We study the existence of the (thermodynamic) limit of the scaled cumulant-generating function L_n(z)=|W_n|^{-1}\logE\exp{z|\Xi\cap W_n|} of the empirical volume fraction |\Xi\cap W_n|/|W_n|, where |\cdot| denotes the d-dimensional Lebesgue measure. Here
Heinrich, Lothar
core   +2 more sources

Diversification of Pharmaceutical Manufacturing Processes: Taking the Plunge into the Non-PGM Catalyst Pool

open access: yesACS Catalysis
Recent global events have led to the cost of platinum group metals (PGMs) reaching unprecedented heights. Many chemical companies are therefore starting to seriously consider and evaluate if and where they can substitute PGMs for non-PGMs in their ...
Hui Zhao   +4 more
semanticscholar   +1 more source

A Simple and Universal Nucleic Acid Assay Platform Based on Personal Glucose Meter Using SARS-CoV-2 N Gene as the Model

open access: yesBiosensors, 2022
A simple, selective, and quantitative platform for point-of-care diagnostic of COVID-19 is urgently needed as a complement in areas where resources are currently relatively scarce. To meet the needs of early diagnosis and intervention, a proof-of-concept
Tian Li   +6 more
doaj   +1 more source

From optimal measurement to efficient quantum algorithms for the hidden subgroup problem over semidirect product groups

open access: yes, 2005
We approach the hidden subgroup problem by performing the so-called pretty good measurement on hidden subgroup states. For various groups that can be expressed as the semidirect product of an abelian group and a cyclic group, we show that the pretty good
Bacon, Dave   +2 more
core   +1 more source

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