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液压胀形金属板材的塑性行为表征(英文)

中国有色金属学会会刊：英文版 2012年第S2期22卷 275-279页

作者： Lucian LZRESCU Dan-Sorin COMSA Ioan NICODIM Ioan CIOBANU dorel banabic CERTETA Research Centre Technical University of Cluj-Napoca Cluj-Napoca Romania

采用圆形和椭圆形的模具进行液压胀形试验。利用最近提出的椭圆形模具胀形方法来确定等效应力—应变曲线。该方法将ARAMIS系统测得的实验数据与分析相结合。在使用椭圆形模具的液压胀形实验中,随着模具椭圆度的减小,等效应力—应变曲线... 详细信息

采用圆形和椭圆形的模具进行液压胀形试验。利用最近提出的椭圆形模具胀形方法来确定等效应力—应变曲线。该方法将ARAMIS系统测得的实验数据与分析相结合。在使用椭圆形模具的液压胀形实验中,随着模具椭圆度的减小,等效应力—应变曲线逐渐远离圆形模具胀形的曲线。通过胀形测试来确定DC04钢板在正次应变范围内的成形极限图。

关键词：液压胀形试验应力—应变曲线成形极限图

一种整体壁板填料辅助滚弯成形过程中填料作用机理

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Transactions of Nonferrous Metals Society of China 2023年第8期33卷 2314-2327页

作者：李瀚伟宋鸿武张士宏万里贾春莉柴雪婷张国威 Lucian LĂZĂRESCU dorel banabic 中国科学院金属研究所师昌绪先进材料创新中心沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016 首都航天机械有限公司北京100076 Department of Manufacturing Engineering Technical University of Cluj-NapocaCluj-Napoca 400641Romania

研究一种2A12铝合金整体壁板的聚丙烯填料辅助滚弯成形工艺,结合力学分析、数值模拟和实验验证,揭示填料的作用机理。结果表明,整体壁板筋条与蒙皮处的中性层位置差导致其成形后母线直线度不达标,填料可以降低这种中性层位置差。当填料... 详细信息

研究一种2A12铝合金整体壁板的聚丙烯填料辅助滚弯成形工艺,结合力学分析、数值模拟和实验验证,揭示填料的作用机理。结果表明,整体壁板筋条与蒙皮处的中性层位置差导致其成形后母线直线度不达标,填料可以降低这种中性层位置差。当填料与筋条有一定宽度间隙(1~3 mm)时,可以避免填料卷曲和筋条失稳。而填料和筋条的高度间隙决定填料可被压缩程度,当填料在压缩后仍高于筋条(1 mm)时,可以达到最佳的压力传递效果。填料的弹性模量在一定范围内时(450~1300 MPa),对整体壁板的成形精度影响不大。但填料弹性模量较低时(50 MPa),填料传递的压力不足;填料弹性模量较高时(20 GPa),整体壁板弯曲变形受限。实验后壁板母线直线度的测量结果验证了填料的作用机理。

关键词：整体壁板滚弯成形填料中性层母线直线度

Swelling-Based Chemical Sensing With Unmodified Optical Fibers

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Photonic Sensors 2022年第2期12卷 99-104页

作者： Alin JDERU dorel DOROBANTU Dominik ZIEGLER Marius ENACHESCU S.C.NanoPro START MC S.R.L. Bucharest 033091Romania Center for Surface Science and Nanotechnology University Politehnica of BucharestBucharest 060042Romania Academy of Romanian Scientists Bucharest 050094Romania

We use distributed fiber optic strain sensing to examine swelling of the fiber’s polymer *** distributed sensing technique that uses unmodified low-cost telecom fibers opens a new dimension of applications that include leak detection,monitoring of water quality,and waste *** a short-range length scale,the technology enables“lab-on-a-fiber”applications for food processing,medicine,and biosensing for *** chemical sensing is realized with unmodified low-cost telecom optical fibers,namely,by using swelling in the coating material of the fiber to detect specific *** generic and able to work in various areas such as environmental monitoring,food analysis,agriculture or security,the proposed chemical sensors can be targeted for water quality monitoring,or medical diagnostics where they present the most groundbreaking ***,the technique is without restrictions applicable to longer range installations.

关键词： Chemical sensing distributed fiber optic strain short range sensing Brillouin optical time domain analysis

Experiences of the Electricity System Operator Incentive Scheme in Great Britain

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Energy and Power Engineering 2012年第4期4卷 218-225页

作者： Guilherme Luiz Susteras dorel Soares Ramos Roland Berger Strategy Consultants Sao PauloBrazil Escola Politécnica University of Sao PauloSao PauloBrazil

National Grid is the electricity system operator in Great Britain and has an unique feature in so far as it is one of the world’s few for-profit system operators. In addition, the commercially orientation of the British market rules means that nearly every action taken by National Grid to operate the system has a cost associated to it. Based on those factors and in order to encourage National Grid to seek continuous improvements and drive for efficient and economic system operation, the regulator (Ofgem) offers an incentive scheme, whereby a target is agreed annually and any savings in relation to this target are shared between consumers and National Grid in the form of a profit. It is in National Grid’s best interest to have mechanisms to mitigate the impacts of volatility in the costs it faces as system operator so that it can implement cost saving actions without the risk of windfall losses (or gains) arising from sudden changes in uncontrollable drivers. The purpose of this paper is to share the experiences of National Grid in the operation of Great Britain's electricity system, with a special interest on the mechanisms created to manage the associated costs in response to the incentive scheme. It does so by describing the market operation in Great Britain and the costs drivers impacting National Grid’s system operation and illustrating the steps recently taken by National Grid to propose volatility mitigation mechanisms. It concludes with the rationale and expected results from the latest proposals as consulted with the industry for introduction in the incentive scheme starting on 1st April 2011. It is worth noting that with this work, the authors wish to both share the experience with other system operators and regulators in the world, as well as give British market participants an insight on the inner workings of National Grid.

关键词： Power System System Operation Ancillary Services Wholesale Electricity Market

New perspectives of volemic resuscitation in polytrauma patients:a review

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Burns & Trauma 2016年第1期4卷 34-40页

作者： Ovidiu Horea Bedreag Marius Papurica Alexandru Florin Rogobete Mirela Sarandan Carmen Alina Cradigati Corina Vernic Corina Maria Dumbuleu Radu Nartita dorel Sandesc Clinic of Anaesthesia and Intensive Care Emergency County Hospital"PiusBrinzeu"Bd.Iosif Bulbuca nr.10TimisoaraTimisRomania. Faculty ofMedicine "Victor Babes"University of Medicine and PharmacyTimisoaraRomania. Clinic of Anaesthesia and Intensive Care Emergency County Hospital"PiusBrinzeu"Bd.Iosif Bulbuca nr.10TimisoaraTimisRomania. Faculty ofMedicine "Victor Babes"University of Medicine and PharmacyTimisoaraRomania. Faculty of Chemistry BiologyGeographyWest University of TimisoaraTimisoaraRomania. Clinic of Anaesthesia and Intensive Care"Casa Austria" EmergencyCounty Hospital"Pius Brinzeu"TimisoaraRomania. Faculty ofMedicine "Victor Babes"University of Medicine and PharmacyTimisoaraRomania. Clinic of Anaesthesia and Intensive Care Emergency County Hospital"PiusBrinzeu"Bd.Iosif Bulbuca nr.10TimisoaraTimisRomania. Faculty of Chemistry BiologyGeographyWest University of TimisoaraTimisoaraRomania.

Nowadays,fluid resuscitation of multiple trauma patients is still a challenging *** therapies for volume replacement in severe haemorrhagic shock can lead to adverse reactions that may be fatal for the *** presenting with multiple trauma often develop hemorrhagic shock,which triggers a series of metabolic,physiological and cellular *** disorders combined,lead to complications that significantly decrease survival rate in this subset of *** and electrolyte resuscitation is chal enging due to many factors that *** management can lead to post-resuscitation systemic inflammation causing multiple organ failure and ultimately *** literature,there is no exact formula for this purpose,and opinions are *** paper presents a review of modern techniques and current studies regarding the management of fluid resuscitation in trauma patients with hemorrhagic *** to the literature and from clinical experience,al aspects regarding post-resuscitation period need to be ***,for every case in particular,emergency therapy management needs to be rigorously respected considering al physiological,biochemical and biological parameters.

关键词： Multiple trauma Fluid resuscitation Intensive care Electrolyte imbalance

Resistance Matrix for an Anisotropic Hall Plate with Multiple Extended Asymmetric Contacts on the Boundary

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Journal of Applied Mathematics and Physics 2021年第8期9卷 1911-1925页

作者： dorel Homentcovschi Radu Oprea Bruce T. Murray Department of Applied Mathematics University Politehnica of Bucharest Bucharest Romania Department of Mechanical Engineering Binghamton University Binghamton NY USA 17-1506 Eagle Mountain Dr. Coquitiam British Columbia Canada

The electrical properties of magnetic sensing devices fabricated from anisotropic materials are not easily extracted. Here we present a method for determining the resistance matrix for an anisotropic device with multiple electrical contacts placed in a perpendicular magnetic field. By using the methods developed by Van der Pauw and Wasscher, the analysis for the anisotropic system is reduced to the equivalent problem for an isotropic sample, which can then be solved using methods developed previously. As a result, the method works in the case of structures with an arbitrary number of asymmetric extended contacts at large magnetic field strength. In addition to the extraction of nonisotropic resistivities, the resistance matrix can be used to analyze the Hall effect for anisotropic plates.

关键词： Hall Device Resistance Matrix Van Der Pauw Method Anisotropic

Vascular Flora from Ecoton Zones of the Slatioara Secular Forest

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Open Journal of Forestry 2023年第1期13卷 75-91页

作者： Marius Dan Șandru Camelia-Maria Golea Dumitru dorel Blaga Genebank “Mihai Cristea” Suceava Romania Stefan cel Mare University of Suceava Suceava Romania

The purpose of this study is to generate essential scientific information regarding the floristic composition and the structures of the ecotone vegetation in the natural forest Codrul Secular Slătioara, because so far no such studies have been carried out in this reserve. Also, the results of this study provide important data, which can be the basis for the development of strategies for the conservation and sustainable use of some herbaceous species, valuable due to genetic and socio-economic, respectively of a regular forest monitoring program. The floristic studies were carried out in the 2020 to 2021 vegetation season. Based on the specialized literature, plant species were identified and then processed from the point of view of bioforms, floristic elements and ecological indices. The economic categories in which the identified species fall were also analyzed. Thus, a total of 292 species belonging to 46 botanical families were identified and their distribution by ecosystems is as follows: in the forest, 90 species were identified, in the lands adjacent to the forest, in the meadows, 202 species were found and in the area of border, 120 species of vascular plants were identified. Most of the species identified in the study area are hemicryptophytes, heliophiles, and eurytherms, which grow on dry to moderately moist, eurytrophic soils. More than 50% of the identified species belong to several categories of useful plants (fodder, medicinal, melliferous, edible).

关键词： Flora Border Bioforms Floristic Elements Ecological Indices Economic Cat-egories

The influence of metabolic imbalances and oxidative stress on the outcome of critically ill polytrauma patients: a review

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Burns & Trauma 2017年第1期5卷 17-23页

作者： Alexandru Florin Rogobete dorel Sandesc Marius Papurica Emil Robert Stoicescu Sonia Elena Popovici Lavinia Melania Bratu Corina Vernic Adriana Mariana Sas Adrian Tudor Stan Ovidiu Horea Bedreag Faculty of Medicine Victor Babes University of Medicine and PharmacyStr.Eftimie Murgu Nr.2Timisoara300041TimisRomania Clinic of Anaesthesia and Intensive Care Emergency County Hospital“PiusBrinzeu”Bd.Liviu Rebreanu Nr.156Timisoara300736TimisRomania

The critically ill polytrauma patient presents with a series of associated pathophysiologies secondary to the traumatic injuries. The most important include systemic inflammatory response syndrome (SIRS), sepsis, oxidative stress (OS), metabolic disorders, and finally multiple organ dysfunction syndrome (MODS) and death. The poor outcome of these patients is related to the association of the aforementioned pathologies. The nutrition of the critically ill polytrauma patient is a distinct challenge because of the rapid changes in terms of energetic needs associated with hypermetabolism, sepsis, SIRS, and OS. Moreover, it has been proven that inadequate nutrition can prolong the time spent on a mechanical ventilator and the length of stay in an intensive care unit (ICU). A series of mathematical equations can predict the energy expenditure (EE), but they have disadvantages, such as the fact that they cannot predict the EE accurately in the case of patients with hypermetabolism. Indirect calorimetry (IC) is another method used for evaluating and monitoring the energy status of critically ill patients. In this update paper, we present a series of pathophysiological aspects associated with the metabolic disaster affecting the critically ill polytrauma patient. Furthermore, we present different non-invasive monitoring methods that could help the intensive care physician in the adequate management of this type of patient.

关键词： Critically ill Energy expenditure Indirect calorimetry Metabolic disaster Oxidative stress Overfeeding Underfeeding Polytrauma

Data Regarding Qualitative and Quantitative Composition of Benthic Populations from Musura Bay-Danube Delta, Romania

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Journal of Environmental Science and Engineering(B) 2015年第11期4卷 569-573页

作者： Manuela Diana Samargiu Daciana Sava dorel Ureche Gabriela Mihaela Pamschiv Faculty of Natural Sciences and Agricultural Sciences Ovidius University of Constanta Constanta 900470 Romania Department of Biology Ecology and Environmental Protection Faculty of Sciences "Vasile Alecsandri" University Bacau600115 Romania

The present paper refers to some data regarding zoobenthic communities from one of northern lagoon of the Danube delta, known as Musura bay （ROSCI0065, coded as coastal lagoon ＊ 1150）. Faunal composition is influenced by the mixture of waters from the Danube and the marine coastal zone. According to monitored areas, there are dominant freshwater or marine invertebrates forming populations that live in the sediments. The aim of this paper is to offer a view of the endopsammic and endopelitic benthic communities from Musura bay, during two years of observations （2013 and 2014） and analyze the seasonal dynamics of invertebrates＇ populations. Based on quantitative samples collected from infralittoral zone, the paper presents the qualitative structure and a quantitative analyze （abundance, constancy--F%, dominance--D% and Wo%） of invertebrate populations from all taxa （belonging to Foraminifera, Nematoda, Gasteropoda, Oligochaeta, Polychaeta, Ostracoda, Copepoda, Cumacea, Amphipoda and Chironomidae etc.） found in the researched zones, in connection with variation of local ecological conditions. Some considerations regarding the role of invertebrates＇ populations as food resources for lagoon fishes are done,

关键词： Black sea Danube delta Musura bay zoobenthos.