(Press-News.org)
Recently, a research group lead by Prof. Shuting Wang from topology optimization of Huazhong University of Science and Technology has put forward a massively efficient filter utilizing the splitting of the tensor product structure. This study can be found in the journal Frontiers of Mechanical Engineering on 10 January, 2023.
With the aid of spitting technique, the traditional weight matrices of both B-splines and non-uniform rational B-splines implicit filters are equivalently decomposed into two or three submatrices, by which the sensitivity analysis is reformulated for the nodal design variables without altering the optimization process.
“Afterwards, we establish an explicit sensitivity filter in terms of the tensor product of the axial distances between adjacent elements centroids, which is decomposed by the splitting pipeline as that applied to implicit filter, and the corresponding sensitivity analysis is derived for elemental design variables.” said by Dr. Aodi Yang, the author of this study.
According to the numerical results, compared to the traditional filter, the average updating time for design variables is accelerated by two orders of magnitude for the decomposed filter. Besides, both memory burden and computing time of weight matrix are decreased by six and three orders of magnitude for the decomposed filter.
The research team of Prof. Shuting Wang is one of the outstanding teams in topology optimization in China. This team has been devoted to topology optimization research for more than ten years and has achieved plenty of academic achievements.
“In the future, the combination of the proposed decomposed filter with the geometric reconstruction-based IGA method will extend the IGA-based topology optimization method into the design problems with complex CAD models,” said Dr. Xie.
###
Reference: Aodi YANG, Shuting WANG, Nianmeng LUO, Tifan XIONG, Xianda XIE. Massively efficient filter for topology optimization based on the splitting of tensor product structure. Front. Mech. Eng., 2022, 17(4): 54 https://doi.org/10.1007/s11465-022-0710-6
About Higher Education Press
Founded in May 1954, Higher Education Press Limited Company (HEP), affiliated with the Ministry of Education, is one of the earliest institutions committed to educational publishing after the establishment of P. R. China in 1949. After striving for six decades, HEP has developed into a major comprehensive publisher, with products in various forms and at different levels. Both for import and export, HEP has been striving to fill in the gap of domestic and foreign markets and meet the demand of global customers by collaborating with more than 200 partners throughout the world and selling products and services in 32 languages globally. Now, HEP ranks among China's top publishers in terms of copyright export volume and the world's top 50 largest publishing enterprises in terms of comprehensive strength.
The Frontiers Journals series published by HEP includes 28 English academic journals, covering the largest academic fields in China at present. Among the series, 13 have been indexed by SCI, 6 by EI, 2 by MEDLINE, 1 by A&HCI. HEP's academic monographs have won about 300 different kinds of publishing funds and awards both at home and abroad.
About Frontiers of Mechanical Engineering
Frontiers of Mechanical Engineering is an international peer-reviewed academic journal sponsored by the Ministry of Education of China. The journal seeks to provide a forum for a broad blend of high-quality academic papers in order to promote rapid communication and exchange between researchers, scientists, and engineers in the field of mechanical engineering. The journal publishes original research articles, review articles and feature articles. The journal covers all major branches of mechanical engineering including (not limited to): machines and mechanisms, gears and transmissions, mechanical system dynamics, mechanical structures and stress analysis, tribology and surface technology, mechanical design and bionics, machining processes and technologies, manufacturing automation, precision engineering, mechatronics and embedded systems, micro/nano manufacturing and systems, robotics, sensing, MEMS, and green manufacturing.
The Editors-in-Chief are Academician Zheng You from Huazhong University of Science and Technology, China, Academician Dongming Guo from Dalian University of Technology, China. The journal has been indexed by SCI, SCOPUS, INSPEC, Astrophysics Data System (ADS), Google Scholar, CSA, Academic OneFile, Chinese Science Citation Database, Expanded Academic, Gale, OCLC, Summon by ProQuest, etc.
END
A large observational study published in JAMA Internal Medicine suggests that most patients do not medically benefit from consultation with a medical specialist before their surgery.
In Canada, surgeons refer more than 40,000 patients each year for consultation with a medical specialist (such as a general internist, cardiologist, endocrinologist, geriatrician, or nephrologist) before surgery. Between 10 and 40% of elective surgery patients will have a preoperative medical consultation.
These preoperative medical consultations are meant to address health issues that could lead to complications during surgery, but the evidence to support them has been limited ...
Public health experts at the University of Colorado Anschutz Medical Campus released a new research letter today in JAMA Pediatrics that examines how quickly Colorado’s children and teenagers can access a loaded gun and call attention to the critical importance of reducing access to guns when an adolescent is in crisis.
“There’s a high rate of firearm suicides in our youth and we know that for a large portion of those who attempt suicide, that ideation to action can happen under 10 minutes,” said principal investigator Ashley Brooks-Russell, ...
After a child’s hospital stay, many families covered by private insurance may experience sticker shock – on average spending $1,300 out of pocket – a new study in JAMA Pediatrics suggests.
For one in seven families, the price tag is even higher, exceeding $3,000.
“Bills for a child’s hospitalization can be astonishingly high for some families depending on how their insurance plan is structured,” said lead author Erin Carlton, M.D., a pediatric intensivist at University of Michigan Health C.S. Mott Children's ...
About The Study: In this study of 1,678 participants, expectations of low benefit and high adverse effects, the tendency to catastrophize instead of normalize benign bodily sensations, and prior negative experiences were associated with COVID-19 vaccination adverse effects. Clinician-patient interactions and public vaccine campaigns may both benefit from these insights by optimizing and contextualizing information provided about COVID-19 vaccines.
Authors: Ingmar Schafer, Ph.D., of the University Medical Center Hamburg-Eppendorf ...
Lunar surface water has attracted much attention due to its potential for in-situ resource utilization by future lunar exploration missions and other space missions
Now, a research group led by Prof. HU Sen from the Institute of Geology and Geophysics (IGG) of the Chinese Academy of Sciences (CAS) has found that impact glass beads in Chang'e-5 (CE5) lunar soils contain some water.
Detailed studies show that these glass beads are likely a new water reservoir on the Moon, recording the dynamic ingress and egress of solar wind-derived water and acting ...
A 2022 study from Oregon Health & Science University researchers confirmed that chronic use of cannabis may greatly impact male fertility and reproductive outcomes in nonhuman primates — but it was unclear whether the effects are permanent. Now, the OHSU research team has confirmed that discontinuing use of THC can at least partly reverse these effects, according to a new study published online today in Fertility & Sterility.
This is one of the first studies demonstrating that discontinuation ...
**EMBARGOED TILL 11 A.M. ET MONDAY, MARCH 27
To develop treatments that may one day entirely rid the body of HIV infection, scientists have long sought to identify all of the places that the virus can hide its genetic code. Now, in a study using blood samples from men and women with HIV on long-term suppressive therapy, a team led by Johns Hopkins Medicine scientists reports new evidence that one such stable reservoir of HIV genomes can be found in circulating white blood cells called monocytes.
Monocytes are short-lived circulating immune cells that are a precursor to macrophages, immune cells able to engulf and destroy viruses, bacteria ...
Every year, hundreds of thousands of pairs of black holes merge in a cosmic dance that emits gravitational waves in every direction. Since 2015, the large ground-based LIGO, Virgo and KAGRA interferometers have made it possible to detect these signals, although only about a hundred such events, an infinitesimal fraction of the total, have been observed. Most of the waves remain 'indistinguishable', superimposed and added together, creating a flat, diffuse background signal that scientists call the 'stochastic gravitational wave ...
The results of a study published in “Advances in Nutrition” that compared dietary and nutrition recommendations from dozens of clinical practice guidelines around the world for treating, managing and preventing major chronic diseases should increase clinician confidence on recommending consumption of fruits, vegetables, legumes and whole grains.
The meta-epidemiological study from the American College of Lifestyle Medicine (ACLM) reviewed 78 clinical practice guidelines published between 2010 and 2021 in North America, Europe and Asia and found close alignment in their recommendations for encouraging daily intake of plant food sources, while ...
The knowledge of biodiversity in allegedly well-known places is not as complete as one would expect and its detailed study by researchers continues to offer surprises, is what we find out in a new study of the flora of south-central Spain.
Now, Spanish botanists from Pablo de Olavide University (Seville, Spain) have described a new plant species of the papyrus family (Cyperaceae) restricted to the La Mancha region in south-central Spain. This region is in fact well-known for classic literary fans, who might recognise the name ...
