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Advanced virtual prototyping for cyber-physical systems using RISC-V: implementation, verification and challenges

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Science China(Information Sciences) 2022年第1期65卷 5-21页

作者： vladimir HERDT Rolf DRECHSLER Institute of Computer Science University of Bremen Cyber-Physical Systems DFKI Gmb H

Virtual prototypes(VPs) are crucial in today’s design flow. VPs are predominantly created in System C transaction-level modeling(TLM) and are leveraged for early software development and other system-level use cases. Recently, virtual prototyping has been introduced for the emerging RISC-V instruction set architecture(ISA) and become an important piece of the growing RISC-V ecosystem. In this paper, we present enhanced virtual prototyping solutions tailored for RISC-V. The foundation is an advanced open source RISC-V VP implemented in System C TLM and designed as a configurable and extensible *** scales from small bare-metal systems to large multi-core systems that run applications on top of the Linux operating system. Based on the RISC-V VP, this paper also discusses advanced VP-based verification approaches and open challenges. In combination, we provide for the first time an integrated and unified overview and perspective on advanced virtual prototyping for RISC-V.

关键词： virtual prototyping RISC-V SystemC TLM verification

围立体定向放射治疗期使用生长抑素类似物对生长激素腺瘤患者放疗疗效的影响研究进展

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国际内分泌代谢杂志 2024年第4期44卷 250-254页

作者： vladimir Melnikov 俞一飞何敏张朝云李益明复旦大学附属华山医院内分泌科上海200040

术后放射治疗可使60%~70%的肢端肥大症患者达到生化缓解,但起效缓慢,从治疗起效到生化缓解需要27.5~43.0个月的时间。立体定向放射治疗是目前常用的放疗类型,该疗法采用精准且高剂量的电离辐射照射生长激素腺瘤,相比普通放疗,可以使患... 详细信息

术后放射治疗可使60%~70%的肢端肥大症患者达到生化缓解,但起效缓慢,从治疗起效到生化缓解需要27.5~43.0个月的时间。立体定向放射治疗是目前常用的放疗类型,该疗法采用精准且高剂量的电离辐射照射生长激素腺瘤,相比普通放疗,可以使患者更快地达到生化缓解。由于放疗的起效时间比较长,为更好的控制生化水平,有临床指南推荐接受放疗的患者在放疗前接受生长抑素类似物治疗,并在放疗后使用生长抑素类似物作为过渡治疗。但目前对于围放疗期使用生长抑素类似物对肢端肥大症患者的生化缓解是否有影响存在争议,需要进一步探索,并确认围放疗期是否需要使用生长抑素类似物治疗以及使用的时间窗。

关键词：肢端肥大症生长激素腺瘤生长抑素类似物立体定向放射治疗

Technological lubricating means： Evolution of materials and ideas

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Frontiers of Mechanical Engineering 2016年第1期11卷 101-107页

作者： vladimir A. GODLEVSKIY Department of Physics Ivanovo State University Ivanovo 153025Russia

The main stages of technological lubricating material development from ancient times to date are described. How the chemical composition of these products changed with time, how new ideas revealing the physical and chemical basics of external media that influence the mechanical processing of materials appeared, how these ideas explained the differences between traditional tribology and specific technology of metal processing are discussed. The question of the possible realization of Rehbinder＇s adsorption effect in contact zone is also stated. The description of a very captivating problem is related to the explanation of the mechanism of lubricant penetration into the contact zone between the material being processed and the tool. The birth and development of the hypothesis of microcapillary penetra- tion of the lubricant into the dynamically changed intersurface clearance that has finally led to formulating the ＂necessary kinetic condition of the lubricating activity＂ is relayed.

关键词： technological lubrication and cooling metal cutting grinding lubrication action tribology

Elaboration of a conceptual solution for the development of the Arctic shelf from seasonally flooded coastal areas

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International Journal of Mining Science and Technology 2022年第1期32卷 113-119页

作者： vladimir S.Litvinenko Mikhail V.Dvoynikov vladimir L.Trushko Saint-Petersburg Mining University Saint-Petersburg 199106Russia

Currently,construction of facilities in the Arctic is carried out on sand islands,but there are limitations for remote coastal *** restrictions are associated with the lack of quarries with construction sand in the immediate vicinity of the work site,as well as the risk of seasonal flooding of the *** article includes conceptual solutions for construction of modular piling in Arctic nearshore conditions,upon which drilling rigs and auxiliary equipment can be placed for the purpose of subsequent wildcatting,development and exploratory extended reach drilling wells(with measured depth about 15000 m).During the construction of the modular piling foundations,a mathematical simulation of the thermodynamic condition of the frozen ground was conducted,and the bearing capacity of the foundations was *** proposed solutions will solve these problems by constructing modular pile foundations and placing the necessary infrastructure on them,taking into account the distribution of loads during operation in seasonally flooded areas.

关键词： Drilling&drillholes Stress analysis Offshore engineering Infrastructure planning Geotechnical engineering Extended reach drilling

Effect of Y_2O_3 and Total Oxide Addition on Mechanical Properties of Pressureless Sintered β-SiC

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Journal of Materials Science & Technology 2003年第3期19卷 193-196页

作者： vladimir D.Krstic Centre for Manufacturing of Advanced Ceramics and Nanomaterials Queen’s UniversityNicol HallKingstonOntarioCanada K7L 3N6

The effect of Y203 and the total oxide volume fraction (Y203+AI203) on density and mechanical properties of low temperature (1770-1940℃) pressureless sintered β-SiC ceramics were presented. The optimum temperature for pressureless sintering of β-SiC was found to be -1850℃ and the optimum content of Y203 in the oxides was found to be between 40 and 57 wt pct. The highest sintered density was achieved by adding oxides at 14 vol. pct. Both of the highest strength and fracture toughness were achieved at -14 vol. pct oxide addition and yttria concentrations between 40 and 57 wt pct in the oxides. Hardness, on the other hand, was found to be the highest for samples with 14 vol. pct oxide addition and -64 wt pct Y2O3 in oxides.

关键词： Y_2O_3 SiC Mechanical properties Sintering

A theory to link relationships of stand volume,density,mean diameter and height in forestry data

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Journal of Forestry Research 2021年第1期32卷 15-20页

作者： vladimir L.Gavrikov Chair of Ecology and Environmental Studies Institute Ecology and GeographySiberian Federal University79 pr.SvobodnyiKrasnoyarskRussian Federation 660041

In this study,a geometric model of a growing forest stand has been *** basic relationships considered link stand volume and stand density,diameter at breast height(DBH),mean DBH and mean *** model provides simple formulas connecting the exponents of all the *** of the formulas to real forestry data provided a high level of predictions of an exponent from two others measured through regressions from empirical *** Pinus sylvestris *** were of a static nature,a collection of individual stands,while the Pseudotsuga menziesii(Mirb.)Franco data were dynamic,representing forest stand development over *** ability of the model to predict exponents in the empirical data implies,on the one hand,a substantial level of similarity between the model and the forestry ***,on the other hand,the model gives an example in which parameters of one relationship may be linked to parameters of *** this kind of‘relationship between relationships’may be observed in forest stands undergoing active growth and competition-induced self-thinning.

关键词： Relationship between relationships Selfthinning Forestry data Allometry Scots pine Douglasfir

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冰岛东部最美小镇白日梦想家们的隐世仙境

环球人文地理 2024年第13期 144-153页

作者：邓文倩 vladimir marieagns Nataliya Fotokon Sen Isabel Baldovi Marc Jedamus Kristina Ryan Unsplash 摄图网

冰岛东部峡湾，有一个小镇被群山、瀑布环绕，远离城市喧嚣，宛如被时间遗忘的世外桃源。在电影《白日梦想家》中，男主角沃尔特为了找到杂志新刊的底片，踏上了一段奇幻冒险旅程。他在影片里看似穿越了格陵兰岛、冰岛、尼泊尔、喜马拉...

冰岛东部峡湾，有一个小镇被群山、瀑布环绕，远离城市喧嚣，宛如被时间遗忘的世外桃源。在电影《白日梦想家》中，男主角沃尔特为了找到杂志新刊的底片，踏上了一段奇幻冒险旅程。他在影片里看似穿越了格陵兰岛、冰岛、尼泊尔、喜马拉雅山脉……但实际上整部电影的取景地全都在冰岛。影片最令人印象深刻的部分，大概是沃尔特用公仔和小孩子交换滑板后，在一条盘山公路上急速滑行。公路的尽头就是被LonelyPlanet评为“冰岛东部最美小镇”的塞济斯菲厄泽。

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Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第4期12卷 732-741页

作者： Liangchao Zou vladimir Cvetkovic Division of Resources Energy and InfrastructureDepartment of Sustainable DevelopmentEnvironmental Science and EngineeringRoyal Institute of TechnologyStockholm10044Sweden Department of Physical Geography Stockholm UniversityStockholm10691Sweden

The impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this *** fracture is created from a measured surface of a granite rock *** Bandis model is used to calculate the fracture closure due to normal stress,and the fluid flow is simulated by solving the Reynold *** Lagrangian particle tracking method is applied to modeling the advective transport in the *** results show that the normal stress significantly affects fluid flow and solute transport in rock *** causes fracture closure and creates asperity contact areas,which significantly reduces the effective hydraulic aperture and enhances flow ***,the reduced aperture and enhanced channeling affect travel time *** particular,the enhanced channeling results in enhanced first arriving and tailing behaviors for solute *** fracture normal stiffness correlates linearly with the 5th and 95th percentiles of the normalized travel *** finding from this study may help to better understand the stress-dependent solute transport processes in natural rock fractures.

关键词： Normal stress Fluid flow Solute transport Stiffness Particle tracking

用于创建数据库和分析冬季运动项目运动员训练信息的技术——以北欧两项为例

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北京体育大学学报 2024年第2期47卷 149-153页

作者：弗拉基米尔·泽布泽耶夫崔明坤(译) 柴可夫斯基国立体育学院俄罗斯柴可夫斯基617740 北京体育大学教育学院中国北京100084

现代体育的显著特点是竞争异常激烈。运动员为了取得最高成绩,往往会进行超负荷的训练[1-3]。运动训练的效率主要取决于对运动员状态信息进行收集、系统化和存储的质量。为了达到这些目的,近年来人们开始使用数据库,它可以将信息存储在... 详细信息

现代体育的显著特点是竞争异常激烈。运动员为了取得最高成绩,往往会进行超负荷的训练[1-3]。运动训练的效率主要取决于对运动员状态信息进行收集、系统化和存储的质量。为了达到这些目的,近年来人们开始使用数据库,它可以将信息存储在计算机系统中,而不是零散地存储在纸质或电子媒介中。如此一来,就可以大大提高决策的效率,这在运动员训练和竞技过程中不断产生大量信息流的情况下尤为重要。

关键词：信息存储现代体育计算机系统运动员训练数据库电子媒介信息流冬季运动项目