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Timing Error Aware Register Allocation in TS

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Computer Systems Science & Engineering 2022年第1期40卷 273-286页

作者： Sheng Xiao Jing He Xi Yang Heng Zhou Yujie Yuan Information Science and Engineering Department Hunan First Normal UniversityChangsha410205China Computer school Wuhan UniversityWuhan430072China Department of Computer Science Kennesaw State UniversityKennesaw30144-5588USA Hunan Guangyi Experimental Middle School Changsha410205China

Timing speculative(TS)architecture is promising for improving the energy efficiency of microprocessors.Error recovery units,designed for tolerating occasional timing errors,have been used to support a wider range of voltage scaling,therefore to achieve a better energy efficiency.More specifically,the timing error rate,influenced mainly by data forwarding,is the bottleneck for voltage down-scaling in TS processors.In this paper,a new Timing Error Aware Register Allocation method is proposed.First,we designed the Dependency aware Interference Graph(DIG)construction to get the information of Read after Write(RAW)in programs.To build the construction,we get the disassemble code as input and suppose that there are unlimited registers,the same way as so-called virtual registers in many compilers.Then we change the disassemble codes to the SSA form for each basic block to make sure the registers are defined only once.Based on the DIG construction,registers were real-located to eliminate the timing error,by loosening the RAW dependencies.We con-struct the DIG for each function of the program and sort the edge of DIG by an increasing weight order.Since a smaller weighted-edge value means that its owner nodes have more frequent access in instruction flows,we expect it in different registers with no read-write dependency.At the same time,we make sure that there are no additional new spill codes emerging in our algorithm to minimize the rate of spill code.A high rate of spill code will not only decrease the performance of the system but also increase the unexpected read-write dependency.Next,we reallocate the reg-isters by weight order in turn to loosen the RAW dependencies.Furthermore,we use the NOP operation to pad the instructions with a minimal distance value of 2.Experiment results showed that the average distance of RAW dependencies was increased by over 20%.

关键词： Timing error timing speculative architecture register allocation energy efficiency

First-principles hybrid functional study of the electronic structure and charge carrier mobility in perovskite CH_3NH_3SnI_3

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Chinese Physics B 2016年第10期25卷 355-361页

作者：伍丽娟赵宇清陈畅文王琳芝刘标蔡孟秋 school of Physics and Electronics Science Hunan University Yali middle school

We calculate the electronic properties and carrier mobility of perovskite CH3NH3SnI3as a solar cell absorber by using the hybrid functional method. The calculated result shows that the electron and hole mobilities have anisotropies with a large magnitude of 1.4 × 104cm2·V-1·s-1along the y direction. In view of the huge difference between hole and electron mobilities, the perovskite CH3NH3 Sn I3can be considered as a p-type semiconductor. We also discover a relationship between the effective mass anisotropy and electronic occupation anisotropy. The above results can provide reliable guidance for its experimental applications in electronics and optoelectronics.

关键词： charge carrier mobility nontoxic perovskite solar cell absorber HSE06 calculations effective masses anisotropy

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球面空间单形的两个几何不等式（英文）

Chinese Quarterly Journal of Mathematics 2019年第2期34卷 204-208页

作者：周永国 Mingda middle school ChangshaHunan

In this paper,by using the theory and method of distance geometry,we study the geometric inequality of a n-dimensional simplex in the spherical space and establish two geometric inequalities involving the edge-length and volume of one simplex and the volume,height and(n-1)-dimensional volume of the side of another simplex in the n-dimensional spherical space.They are the extensions of the results [10] in the n-dimensional Euclidean geometry to the n-dimensional spherical space.

关键词： spherical space simplex volume edge-length height inequality

Exact Nonstationary Solutions of a Two-Component Bose-Einstein Condensate

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Communications in Theoretical Physics 2010年第2期53卷 282-284页

作者：唐基清俞慧友颜家壬周正 Department of Physics Hunan Normal University Lanshan middle school

We investigate the exact nonstationary solutions of a two-component Bose-Einstein condensate whichcompose of two species having different atomic masses. We also consider the interesting behavior of the atomic velocityand the flow density. It is shown that the motion of the two components can be controlled by the experimental parameters.

关键词：玻色爱因斯坦凝聚非平稳精确解双组分物种组成流量密度参数控制组成部分

Sn-doped BiOCl nanosheet with synergistic H^(+)/Zn^(2+)co-insertion for“rocking chair”zinc-ion battery

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Journal of Energy Chemistry 2023年第6期81卷 623-632,I0014页

作者： Yuzhu Qian Hongrui Wang Xinni Li Ting Song Yong Pei Li Liu Bei Long Xiongwei Wu Xianyou Wang school of Chemistry Xiangtan UniversityXiangtan 411105HunanChina school of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128HunanChina

The development of insertion-type anodes is the key to designing“rocking chair”zinc-ion batteries.However,there is rare report on high mass loading anode with high performances.Here,{001}-oriented Bi OCl nanosheets with Sn doping are proposed as a promising insertion-type anode.The designs of cross-linked CNTs conductive network,{001}-oriented nanosheet,and Sn doping significantly enhance ion/electron transport,proved via experimental tests and theoretical calculations(density of states and diffusion barrier).The H^(+)/Zn^(2+)synergistic co-insertion mechanism is proved via ex situ XRD,Raman,XPS,and SEM tests.Accordingly,this optimized electrode delivers a high reversible capacity of 194 m A h g^(-1)at 0.1 A g^(-1)with a voltage of≈0.37 V and an impressive cyclability with 128 m A h g^(-1)over 2500 cycles at 1 A g^(-1).It also shows satisfactory performances at an ultrahigh mass loading of 10 mg cm^(-2).Moreover,the Sn-Bi OCl//MnO_(2)full cell displays a reversible capacity of 85 m A h g^(-1)at 0.2 A g^(-1)during cyclic test.

关键词： Sn-doped BiOCl nanosheet High mass loading anode Synergistic H^(+)/Zn^(2+)co-insertion Fast ionic/electronic diffusion “Rocking chair”zinc-ion battery

Cause Analysis of Boeing 737MAX Accident

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Cause Analysis of Boeing 737MAX Accident

Molecular chaperones in stroke-induced immunosuppression

作者： Jingxi Xia Shenzhen experimental school middle school Department

As the new generation of two-engine single-aisle narrow-body aircraft of Boeing Company, Boeing 737 MAX has had two fatal accidents in less than half a year. In order to find out the accident cause, this paper analyzes the accident from three aspects including the market, design and management of the Boeing 737 MAX and finally elaborates the effects of the two accidents on Boeing and the enlightenment for the global aviation industry.

关键词： Boeing Company 737MAX air crash accident cause

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Neural Regeneration Research 2023年第12期18卷 2638-2644页

作者： Haoduo Qiao Qing Xu Yunfei Xu Yao Zhao Nina He Jie Tang Jie Zhao Ying Liu Department of Neurosurgery Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Pathophysiology Xiangya School of MedicineCentral South UniversityChangshaHunan ProvinceChina Sepsis Translational Medicine Key Laboratory of hunan Province ChangshaHunan ProvinceChina National Medicine Functional experimental Teaching Center ChangshaHunan ProvinceChina Department of Clinical Pharmacology Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Stroke-induced immunosuppression is a process that leads to peripheral suppression of the immune system after a stroke and belongs to the central nervous system injury-induced immunosuppressive syndrome.Stroke-induced immunosuppression leads to increased susceptibility to post-stroke infections,such as urinary tract infections and stroke-associated pneumonia,worsening prognosis.Molecular chaperones are a large class of proteins that are able to maintain proteostasis by directing the folding of nascent polypeptide chains,refolding misfolded proteins,and targeting misfolded proteins for degradation.Various molecular chaperones have been shown to play roles in stroke-induced immunosuppression by modulating the activity of other molecular chaperones,cochaperones,and their associated pathways.This review summarizes the role of molecular chaperones in stroke-induced immunosuppression and discusses new approaches to restore host immune defense after stroke.

关键词： Hsp70 Hsp72 Hsp90 HspB5 hypothalamic-pituitary-adrenal axis molecular chaperones neuroprotection stroke stroke-induced immunosuppression sympathetic nervous system

Gender Differences in Advertising Language of English Cosmetics Advertisements

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海外英语 2019年第2期 89-91页

作者：刘芋蔓 Peking University Affiliated middle school Yunnan experimental school

Ads designer use various ads languages to attract customers.To pander to different gender’s sensitivities of language,cosmetics ads arrange advertising language in different forms.The research explores gender differences in English cosmetics ads from four linguistic aspects,including lexical choice,syntactic structure,rhetorical device and semantic meaning.According to the statistics,the languages of men’s ads and women’s ads have different focuses and approaches.The core of men’s ads is reasonable while women’s ads more empathy.

关键词： language gender cosmetics ads

Feedback of Non-Markovian Quantum Dynamics in Dimer System:the Effect of Correlated Environments and Temperature

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Communications in Theoretical Physics 2015年第12期64卷 676-682页

作者：朱钦圣丁长春邬劭轶赖薇 school of Physical Electronics University of Electronic Science and Technology of China experimental middle school of Chengdu Economic and Technology Development Zone

In this work,we research the non-Markovian dynamical process of the dimer system and the effect of the interactional environments for the information feedback under different temperature T. Not only the functional relation of the trace distance and the fidelity are obtained,but also the changing properties of the fidelity and the measure quantity N(φ) which are used to quantify the degree of the non-Markovian process are discussed as a function of the interactional strength q between the environments. These results show a possible method which can preserve the information and enhance the distinguishability of the pair of states in decohering environments.

关键词： non-Markovian process measure decoherence