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The theory and practice in the evolution of trusted computing

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Chinese Science Bulletin 2014年第32期59卷 4173-4189页

作者： Dengguo feng Yu Qin Wei feng Jianxiong shao Trusted Computing and Information Assurance Laboratory Institute of Software Chinese Academy of Sciences State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences

Trusted computing(TC)is an emerging technology to enhance the security of various computing platforms by a dedicated secure chip(TPM/TCM),which is widely accepted by both the industrial and academic *** paper attempts to sketch the evolution of TC from the view of our theoretical and engineering *** theory,we focus on protocol design and security *** have proposed the first ECDAA protocol scheme based on q-SDH assumption,which highlights a new way to design direct anonymous attestation *** technical evolution,we discuss the key technologies of trust chain,trusted network connection and TC testing and *** break through several key technologies such as trusted boot,OS measurement and remote attestation,and implement a TC system from TPM/TCM to *** also design and implement a testing and evaluation system of TC platform,which is the first one put into practical application in ***,with the rapid development of cloud computing and mobile applications,TC is moving toward some new directions,such as the trust in cloud and mobile environments,new TPM standard,and flexible trust execution environment trust establishment method.

关键词：可信计算 TCM 计算平台移动应用 TPM 安全芯片安全分析匿名认证

The direct numerical simulation of pipe flow

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Journal of Hydrodynamics 2013年第1期25卷 125-130页

作者： LIU Zheng-gang DU Guang-sheng shao Zhu-feng School of Energy and Power Engineering Shandong University

The conservative difference scheme and the third-order Runge-Kutta scheme in combination with the the Crank-Nicholson scheme are used to directly simulate the flow field in a pipe with the Reynolds number of 2 600. The flow field, including the velocity distribution and the turbulence intensity, is obtained by the direct numerical simulation. From the calculated results, the ratio of the linear average velocity along the ultrasonic propagation path to the profile average velocity on the pipe cross-section is also obtained in an ultrasonic flow meter. It is concluded that the direct numerical simulation method can be used to study the ratio of the profile-linear average velocity at low Reynolds number conditions in the transition region and to improve the measurement accuracy of the ultrasonic flow meter.

关键词： Direct Numerical Simulation (DNS) pipe turbulence intensity Reynolds stress

Nanometric polishing of lutetium oxide by plasma-assisted etching

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Advances in Manufacturing 2020年第4期8卷 440-446页

作者： Peng Lyu min Lai feng-Zhou Fang State Key Laboratory of Precision Measuring Technology and Instruments Centre of Micro/Nano Manufacturing Technology(MNMT)Tianjin UniversityTianjin 300072People’s Republic of China Centre of Micro/Nano Manufacturing Technology(MNMTDublin) School of Mechanical and Materials EngineeringUniversity College Dublin.Dublin 4Ireland

Plasma-assisted etching,in which the irradiation of hydrogen plasma and inorganic acid etching are integrated,is proposed as a novel polishing method for sesquioxide *** means of this approach,low damage and even damage-free surfaces with a high material removal rate can be achieved in lutetium oxide surface *** of transmission electron microscopy and X-ray photoelectron spectroscopy reveal that plasma hydrogenation converts the sesquioxide into hydroxide,which leads a high efficient way to polish the *** influences of process conditions on the etching boundary and surface roughness are also qualitatively investigated using scanning electron microscope and white light *** newly developed process is verified by a systematic experiment.

关键词： Plasma-assisted etching Lutetium oxide Surface roughness Subsurface damage

ROCK INITIATION AND PROPAGATION SIMULATION UNDER COMPRESSION-SHEAR LOADING USING CONTINUOUS-DISCONTINUOUS CELLULAR AUTOMATON METHOD

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Acta Mechanica Solida Sinica 2015年第4期28卷 384-399页

作者： Fei Yan Xiating feng Pengzhi Pan shao jun Li State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of Sciences

A continuous-discontinuous cellular automaton method is developed for rock initiation and propagation simulations, in which the level set method, discontinuous enrichment shape functions and discontinuous cellular automaton are combined. No renmshing is needed for crack growth analysis, and all calculations are restricted to cells without an assembled global stiffness matrix. The frictional contact theory is employed to construct the contact model of normal pressure and tangential shear on crack surfaces. A discontinuous cellular automaton updating rule suitable for frictional contact of rock is proposed simultaneously with Newton＇s iteration method for nonlinear iteration. Besides, a comprehensive fracturing criterion for brittle rock under compression-shear loading is developed. The accuracy and effectivenesss of the proposed method is proved by numerical simulation.

关键词： continuous-discontinuous cellular automaton method rock fracturing process compressionshear loading frictional contact comprehensive fracturing criterion

CO Catalytic Oxidation of Pt-Loaded Perovskite BaTiO_3 Near Ferroelectric-Phase Transition Temperature

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Acta Metallurgica Sinica(English Letters) 2018年第10期31卷 1031-1037页

作者： Si-min Yin Jia-Jie Duanmu Yong-feng Yuan shao-Yi Guo Zhi-Chao Zhu Zhao-Hui Ren Gao-Rong Han College of Machinery and Automation Zhejiang Sci-Tech University State Key Lab of Silicon Materials School of Materials Science and Engineering Zhejiang University

Perovskite BaTiO3 （BTO） nanocrystals with a size of 150-200 nm have successfully been synthesized via a facile hydrothermal method by employing titanate nanowires as synthetic precursor. Tetragonality and spontaneous ferroelectric polarization of BTO nanocrystals have been determined by X-ray diffraction and transmission electron microscopy investigations. BTO nanocrystals loaded with Pt nanoparticles in a size of 2-5 nm have been explored as a catalyst towards CO oxidation to CO2. It is interesting to find that CO catalytic conversion rate over Pt-BTO nanocrystals gradually decreased and further increased near 100 ℃ when the catalytic temperature keeps increasing, whereas the conversion behavior in oxides is expected to be enhanced upon the catalytic temperature grows. Using differential scanning calorimetry and first-principle calculations, the observed catalytic behavior has been discussed on the basis of the ferroelectric polarization effect and the ferroelectric-paraelectric transition of BTO nanocrystals with a Curie temperature of 110 ℃. Below Curie temperature, CO catalytic oxidation could be significantly tailored by ferroelectric polarization of BTO nanocrystals via a promoted dissociation of O2 molecules. The findings suggest that a ferroelectric polarization in perovskite oxides could be an alternative way to modify the CO catalytic oxidation.

关键词： Perovskite Ferroelectric materials BaTiO3 Pt Catalysis

Probability density and oscillating period of magnetopolaron in parabolic quantum dot in the presence of Rashba effect and temperature

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Chinese Physics B 2021年第11期30卷 207-213页

作者： Ying-Jie Chen feng-Lan shao School of Physics and Physical Engineering Qufu Normal UniversityQufu 273165China

We study the property of magnetopolaron in a parabolic quantum dot under the Rashba spin–orbit interaction(RSOI)by adopting an unitary transformation of Lee–Low–Pines type and the variational method of Pekar type with and without considering the *** temporal spatial distribution of the probability density and the relationships of the oscillating period with the RSOI constant,confinement constant,electron–phonon coupling strength,phonon wave vector and temperature are *** results show that the probability density of the magnetopolaron in the superposition of the ground and first excited state takes periodic oscillation(T0/period)in the presence or absence of *** of the RSOI,the oscillating period is divided into different ***,the results indicate that the oscillating period increases(decreases)when the RSOI constant,electron-phonon coupling strength and phonon wave vector(the confinement constant)increase in a proper temperature,and the temperature plays a significant role in determining the properties of the polaron.

关键词： Rashba spin-orbit interaction quantum dot polaron temperature

Optimization of equimolar reverse constant-temperature mass-diffusion process for minimum entransy dissipation

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Science China(Technological Sciences) 2016年第12期59卷 1867-1873页

作者： XIA shao Jun CHEN Lin Gen SUN feng Rui Institute of Thermal Science and Power Engineering Naval University of Engineering Military Key Laboratory for Naval Ship Power Engineering Naval University of Engineering College of Power Engineering Naval University of Engineering

The mass entransy describes the mass-diffusion ability of the solution system, and the mass-diffusion process with the finite concentration difference always leads to the mass-entransy dissipation. This paper studies the equimolar reverse constant-temperature mass-diffusion process with Fick's law( g∝Δ(c)). The optimal concentration paths for the MED(minimum Entransy Dissipation) are derived and compared with those for the MEG(minimum Entropy Generation) and CCR(Constant Concentration Ratio) operations. It is indicated that the strategy of the MED is equivalent to that of the CCD(Constant Concentration Difference) of the same component; whether the MED or the MEG is selected as the optimization objective, the strategy of the CCD is much better than that of the CCR.

关键词： mass entransy finite time thermodynamics equimolar reverse mass-diffusion Fick's mass-diffusion law optimal concentration path generalized thermodynamic optimization

抑制细胞骨架改建对流体剪切力作用下成骨细胞增殖与分化影响研究

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中华口腔医学研究杂志（电子版） 2011年第1期5卷 26-30页

作者：邵敏锋徐亚娟向映辉李友瑞张艺平陈睿付强中山大学光华口腔医学院.附属口腔医院.口腔医学研究所广州510055 广东省惠州市口腔医院修复科

目的探讨RNA干扰抑制细胞骨架改建对流体剪切力(FSS)下成骨细胞增殖和分化的影响。方法对小鼠颅骨分离的成骨细胞分别给予RNA干扰、阴性RNA干扰两种处理后,进行FSS加载或不加载。分别应用噻唑蓝(MTT)比色法观测细胞增殖、检测细胞碱性... 详细信息

目的探讨RNA干扰抑制细胞骨架改建对流体剪切力(FSS)下成骨细胞增殖和分化的影响。方法对小鼠颅骨分离的成骨细胞分别给予RNA干扰、阴性RNA干扰两种处理后,进行FSS加载或不加载。分别应用噻唑蓝(MTT)比色法观测细胞增殖、检测细胞碱性磷酸酶(ALP)活性、采用流式细胞仪检测细胞周期,并进行统计分析。结果在无FSS加载条件下,单纯应用RNA干扰方法抑制细胞骨架改建,并不能促进成骨细胞的细胞周期中处于S期的细胞百分比[(3.600±0.447)%与(3.420±0.217)%,t=-0.810,P>0.05]、成骨细胞增殖性能(0.208±0.724与0.211±0.044,t=0.251,P>0.05)及ALP活性(0.095±0.001与0.090±0.020,t=-1.857,P>0.05)增高;FSS能使成骨细胞的细胞周期中处于S期的细胞百分比[(11.110±3.840)%>(3.420±0.217)%,t=-4.460,P0.211±0.044,t=-13.878,P0.090±0.012,t=-7.937,P(3.600±0.447)%,t=-14.339,P0.208±0.724,t=-13.454,P0.095±0.001,t=-7.384,P<0.05)。抑制细胞骨架改建与FSS作用两因素对提高成骨细胞的细胞周期中处于S期的细胞百分比(F=240.125,P<0.05)、成骨细胞增殖性能(F=44.550,P<0.05)及ALP活性(F=13.798,P<0.05)存在正交互作用。结论采用RNA干扰抑制细胞骨架改建,可以促进FSS作用下成骨细胞的增殖和分化。

关键词：流体剪切力细胞骨架成骨细胞 RNA干扰

尿沉渣miR-330-3p在脓毒症相关急性肾损伤诊断中的价值

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中华实用诊断与治疗杂志 2021年第5期35卷 441-444页

作者：闫景瑶史宸硕曹慧霞张旭东阎磊邵凤民郑州大学人民医院河南省人民医院肾内科河南省肾脏病免疫重点实验室河南郑州450003 河南省人民医院重症肌无力综合诊疗中心河南郑州450003 河南省人民医院生物转化医学中心河南郑州450003

目的检测脓毒症相关急性肾损伤(acute kidney injury, AKI)患者尿沉渣miR-330-3p表达,探讨其在脓毒症相关AKI诊断中的价值。方法 4例体检健康者、4例未发生AKI的脓毒症患者、4例脓毒症相关AKI患者为筛选队列,采用高通量测序技术筛选尿... 详细信息

目的检测脓毒症相关急性肾损伤(acute kidney injury, AKI)患者尿沉渣miR-330-3p表达,探讨其在脓毒症相关AKI诊断中的价值。方法 4例体检健康者、4例未发生AKI的脓毒症患者、4例脓毒症相关AKI患者为筛选队列,采用高通量测序技术筛选尿沉渣中差异性表达的miRNA,选择差异表达倍数较高的miR-330-3p进行验证。20例脓毒症患者(脓毒症组)和26例脓毒症相关AKI患者(脓毒症AKI组)为验证队列,采用实时荧光定量PCR法检测2组尿沉渣miR-330-3p相对表达量;绘制ROC曲线,评估尿沉渣miR-330-3p诊断脓毒症患者发生AKI的效能。结果高通量测序技术筛选出43个差异性表达的miRNA。实时荧光定量PCR检测结果显示,脓毒症AKI组尿沉渣miR-330-3p相对表达量[4.641(0.733,12.90)]高于脓毒症组[0.689(0.482,0.997)](P<0.05)。尿沉渣miR-330-3p相对表达量以0.604为最佳截断值,诊断脓毒症患者发生AKI的AUC为0.737(95%CI:0.573~0.899,P<0.05),灵敏度为65.4%,特异度为99.5%。结论尿沉渣miR-330-3p有可能成为脓毒症相关AKI特异度较高的无创诊断标志物之一。

关键词：脓毒症急性肾损伤尿沉渣 miR-330-3p