Prevention from Soft Errors via Architecture Elasticity

Due to the decreasing threshold voltages, shrinking feature size, as well as the exponential growth of on-chip transistors, modern processors are increasingly vulnerable to soft errors. However, traditional mechanisms of soft error mitigation take actions to deal with soft errors only after they have been detected. Instead of the passive responses, this paper proposes a novel mechanism which proactively prevents from the occurrence of soft errors via architecture elasticity. In the light of a predictive model, we adapt the processor architectures h01istically and dynamically. The predictive model provides the ability to quickly and accurately predict the simulation target across different program execution phases on any architecture configurations by leveraging an artificial neural network model. Experimental results on SPEC CPU 2000 benchmarks show that our method inherently reduces the soft error rate by 33.2% and improves the energy efficiency by 18.3% as compared with the static configuration processor.     

基于添加人工数据的高差异性聚类集体生成方法

集体差异性被认为是集成学习中的一个关键因素,在聚类集成的研究中,生成聚类集体的方法有许多种,但就专门致力于生成高差异性聚类集体的方法研究较少,基于此,本文提出生成高差异性聚类集体的方法CEAN和ICEAN,在算法中通过引入人工数据来增加聚类集体的差异性,用实验比较了CEAN和ICEAN与文献中出现的常用聚类集体生成方法,实验表明CEAN和ICEAN确实能增加生成集体的差异性,从而在相似平均集体成员准确度情况下使得聚类集成的效果更好.     

食品中磷脂提取及分析方法的研究进展

磷脂是细胞的重要组成成分,对生物体的生长和发育具有重要作用,也是天然的乳化剂、表面活性剂,在食品、医药、化妆品等领域具有广泛的应用。由于每种磷脂分子可以结合不同的脂肪酸,导致磷脂种类繁多且结构复杂,对磷脂的分析比较困难。本文从磷脂的种类及应用、提取纯化、检测方法等方面,对食品中磷脂的研究进展进行概述,比较不同研究方法的优缺点,以期为不同食品中磷脂的深入研究和开发提供参考。     

新型固相萃取-高效液相色谱检测饮用水中的 邻苯二甲酸脂类物质

目的建立基于新型高效的样品前处理技术即固相萃取-高效液相色谱联用技术同时检测饮用水中七种邻苯二甲酸酯类物质的方法。方法以3-氨基丙基三乙氧基硅烷作为功能单体,四乙氧基硅烷作为交联体,并加入醋酸,合成新型的高选择性材料,并用作为固相萃取材料,吸附七种邻苯二甲酸脂类物质。结果高效液相色谱等度分析方法的最佳检测条件为:流动相为乙腈和水(96:4,V:V);运行时间20 min;检测波长为230 nm;流速1.0 m L/min;柱温30℃;进样量20μL。目标化合物线性范围较宽,其中DMP、DBP、DIDP为0.5~100 mg/L,DCHP、BBP、DEHP为0.5~25 mg/L,DEP为0.5~10 mg/L;该方法对7种目标化合物的检测限在0.18μg/L~1.86μg/L范围内,6次重复实验精密度在1.18%~5.20%之间,标准添加回收率在63.5%~108.4%之间。结论该方法可以用于饮用水中苯二甲酸脂类物质的定量检测。     

A precursor of β—delayed fission：^230Ac

1 INTRODUCTIONNuclei far from stability are characterized by a IUimer of new phenomena. hi heavyneutron-rich region, one of these is P-delayed fission (PDF), i.e., fission from an exitedstate in which the nucleus tu-rns out to be after P decay. For the first time the existenceof an P-delayed fission island was pointed out by Berlovich and Novikov in 1969.[1]PDF provides the possibility of investigating nuclei far from stability, which is im-possible with ordinary techniques. For exam…     

Synthesis and characterization of Li2MnSiO4/C nanocomposite cathode material for lithium ion batteries

A high capacity Li₂MnSiO₄/C nanocomposite cathode material with good rate performance for lithium ion batteries through a solution route has been successfully prepared. The material is able to deliver a reversible capacity of 209 mAh g⁻¹ in the first cycle, i.e. more than one electron exchange can be reversible cycled in the materials. The highly dispersion of nanocrystalline Li₂MnSiO₄ which was surround by a thin film of carbon was attributed to the cause of excellent performance of the materials. Ex situ XRD and IR results show that poor cycling behavior of Li₂MnSiO₄ might be due to an amorphization process of the materials.     

Long-range angular correlation in dissipative reaction of 27Al+27A1

Angular correlation of excitation functions in dissipative heavy ion collision 27Al+27A1 has been measured. The incident beam energies ranged from 114MeV to 127 MeV in steps of 200keV. The angular analysis region was continuous from 50° to 90° in the center of mass system. An angular coherent width, at least 40°, was obtained. This long-range angular correlation could not be interpreted in the framework of the standard statistical reaction theory with state of equilibrium or near equilibrium, maybe it reveals the formation of a new kind ofdissipative structure in the reaction of 27Al+27A1 with the state that is far from equilibrium.     

肉类掺假检测技术研究进展

肉类掺假行为不仅侵害了消费者的利益,甚至危害到消费者的身体健康.因此,对肉类制品成分的检测及其质量的控制监管十分必要.针对这种现象,主要综述以ELISA、PCR、电子鼻技术为主的快速检测方法,并表述了这些技术在近几年的发展进程和存在的一些不足.     

鲭鱼品质评价及品质变化与组胺含量研究进展

海水鱼类的新鲜度体现了鱼肉的可食用价值,海水鱼中的青皮红肉鱼类含有较高的组氨酸,会因保存不当导致体内组胺含量升高,对消费者健康产生危害。组胺是一种食源性化学危害,易导致过敏人群产生中毒现象。组胺中毒又称为鲭鱼中毒,是组胺引起毛细血管扩张和支气管收缩所致,研究表明鲭科鱼类的组氨酸含量高,组氨酸会在产组胺微生物的组氨酸脱羧酶的作用下产生组胺,判定组胺中毒的最有效的方法是检测鲭鱼体内的组胺含量,低水平的组胺并不会对人体产生危害,组胺摄入量过多会对人体产生危害,组胺已成为评价鲭鱼品质的标准之一。本文主要对鲭鱼品质的感官评定和理化评定(组胺、K值、挥发性盐基氮等)方式进行综述,并对组胺产生的影响因素如微生物、温度、鱼的种类等进行综述,为鲭鱼品质鉴定和组胺含量的控制提供依据。     

水产制品中总糖含量检测方法的研究

目的优化水产制品总糖含量测定的检测方法,为水产制品总糖含量检测标准的制定提供参考。方法通过苯酚-硫酸分光光度法测定水产制品中的总糖含量,设计L9(34)正交试验分析水解条件对总糖含量的影响。优化盐酸浓度、水解时间和水解温度条件,并通过测定鱿鱼丝、干鲍鱼和干贝等样品的总糖含量进行验证。结果水解条件影响水产制品总糖含量,优化后的水解条件是:盐酸浓度20%,温度70℃,水解时间0.5 h。干贝、鱿鱼丝和干鲍鱼3种样品的平均加标回收率为92.3%~117%。结论苯酚-硫酸法准确度和精密度高,可适用于水产制品中总糖含量的测定。