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Heavy ion induced upset errors in 90-nm 64 Mb NOR-type floating-gate Flash memory

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Chinese Physics B 2018年第9期27卷 615-619页

作者： jin-shun bi Kai Xi Bo Li Hai-bin Wang Lan-Long Ji jin Lil and Ming Liu Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China University of Chinese Academy of Sciences Beijing 100049 China School of Internet of Things Engineering Hohai University Changzhou 213022 China

Upset errors in 90-nm 64 Mb NOR-type floating-gate Flash memory induced by accelerated ^（129）Xe and ^（209）bi ions are investigated in detail. The linear energy transfer covers the range from 50 to 99.8 Me V/（mg/cm^2）. When the memory chips are powered off during heavy ions irradiation, single-event-latch-up and single-event-function-interruption are excluded,and only 0-〉1 upset errors in the memory array are observed. These error bit rates seem very difficult to achieve and cannot be simply recovered based on the power cycle. The number of error bits shows a strong dependence on the linear energy transfer（LET）. Under room-temperature annealing conditions, the upset errors can be reduced by about two orders of magnitude using rewrite/reprogram operations, but they subsequently increase once again in a few minutes after the power cycle. High-temperature annealing can diminish almost all error bits, which are affected by the lower LET ^（129）Xe ions. The percolation path between the floating-gate（FG） and the substrate contributes to the radiation-induced leakage current, and has been identified as the root cause of the upset errors of the Flash memory array in this work.

关键词： heavy ion Flash memory single event upset annealing

Total Ionization Dose Effects on Charge Storage Capability of Al2O3/HfO2/Al2O3-Based Charge Trapping Memory Cell

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Chinese Physics Letters 2018年第11期35卷 86-89页

作者： Yan-Nan Xu jin-shun bi Gao-Bo Xu Bo Li Kai Xi Ming Liu Hai-bin Wang Li Luo Institu te of Microelectronics Chinese Academy of SciencesBeijing 100029 University of Chinese Academy of Sciences Beijing 100049 School of lnternet of Things Engineering HoHai UniversityChangzhou 213022 Beijing Jiaotong University Beijing 100044

Because of the discrete charge storage mechanism, charge trapping memory（CTM） technique is a good candidate for aerospace and military missions. The total ionization dose（TID） effects on CTM cells with Al2O3/HfO2/Al2O3（AHA） high-k gate stack structure under in-situ 10 keV x-rays are studied. The C-V characteristics at different radiation doses demonstrate that charge stored in the device continues to be leaked away during the irradiation,thereby inducing the shift of flat band voltage（V（fb））. The dc memory window shows insignificant changes, suggesting the existence of good P/E ability. Furthermore, the physical mechanisms of TID induced radiation damages in AHA-based CTM are analyzed.

关键词： AHA Total Ionization Dose Effects on Charge Storage Capability of Al2O3/HfO2/Al2O3-Based Charge Trapping Memory Cell Al

RP-HPLC Determination and Pharmacokinetic Comparison of Cinnamic Acid in Rat Plasma After Administration of Di-Gu-Pi Decoction and Pure Cinnamic Acid

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Chemical Research in Chinese Universities 2006年第1期22卷 56-60页

作者： LI Kang bi Kai-shun Department of Pharmacy Shenzhen Hospital Beijing University Shenzhen 518036 P.R. China College of Pharmacy Shenyang Pharmaceutical University Shenyang 110016 P.R. China

A sensitive, simple, and accurate method was developed for the determination and pharmacokinetic comparison of cinnamic acid in rat plasma after the administration of a Traditional Chinese Medicinal preparation, Di-Gu-Pi decoction, and pure cinnamic acid using RP-HPLC. Di-Gu-Pi was extracted with 5% aqueous sodium bicarbonate, which was followed by purification with ion exchange column chromatography. The plasma samples taken from rats were deproteinized with methanol. The reversed-phase （HPLC） system with a Diamonsil C18 column and methanol-acetonitfile-water （8： 32： 60, volume ratio）（adjusted to pH = 3.0 with glacial acetic acid） as the mobile phase was employed for the separation of cinnamic acid in the plasma samples. The detection was set at 272 nm and 3-（p-fluoro-phenyl）-2-propenoic acid was chosen as the internal standard. The calibration curve was linear in a range from 0. 10 to 25.0μg/mL （R2 = 0. 9988, n = 9）. The precision was 3.42%-10. 10%; the between-day precision was 2. 84%-8.91% ; the accuracy was - 1.51%-1.26% ; the mean recovery was 99. 9%. The method was found to be sensitive, simple, accurate and appropriate for the determination of cinnamic acid.

关键词： Di-Gu-Pi decoction Cinnamic Acid Pharmacokinetics RP-HPLC

不同烫漂方式及冷冻速率对预制西兰花质构品质的影响

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食品科学 2025年第1期46卷 121-130页

作者：赵伊诺金鑫毕金峰谢意通杜婷天津科技大学食品科学与工程学院天津300457 中国农业科学院农产品加工研究所农业农村部农产品加工重点实验室北京100193 沈阳农业大学食品学院辽宁沈阳110866

为探究预制西兰花加工过程中烫漂方式及冷冻速率对西兰花质构品质的影响,对经2种烫漂方式(热水烫漂、蒸汽烫漂)及3种冷冻温度(-20、-40、-80℃)处理的西兰花样品,利用低场核磁共振、理化特性分析方法测定不同处理组样品的水分分布、持... 详细信息

为探究预制西兰花加工过程中烫漂方式及冷冻速率对西兰花质构品质的影响,对经2种烫漂方式(热水烫漂、蒸汽烫漂)及3种冷冻温度(-20、-40、-80℃)处理的西兰花样品,利用低场核磁共振、理化特性分析方法测定不同处理组样品的水分分布、持水性、相对电导率和硬度,观察微观结构。结果表明:维持西兰花硬度的最佳工艺为蒸汽烫漂后进行-40℃冷冻,在此工艺条件下,与对照组相比,处理组西兰花水分分布中结合水峰面积占比(A21)增加最多、持水性最强,花序部分保留66.72%硬度、茎部分保留62.53%硬度,相对电导率增加至87.01%;通过扫描电子显微镜观察发现,经过该处理的西兰花保持了较好的细胞结构。本研究得到了有效维持解冻西兰花质构的工艺,并揭示了不同处理对西兰花水分分布及细胞膜完整性影响的机制,为实际生产过程保持冷冻预制西兰花品质提供了理论与技术支撑。

关键词：预制西兰花持水性水分迁移质构

Calculating the Wave Force on Partially Immersed Large-Scale Horizontal Cylinders

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China Ocean Engineering 2021年第2期35卷 291-300页

作者： LIU bi-jin FU Dan-juan School of Civil Engineering and Architecture Xiamen University of TechnologyXiamen 361024China

Large-scale interceptors constitute the main structure of offshore self-driven floating marine litter collection devices,and the structural stability of such interceptors under the action of waves directly influences the overall safety of the *** the ratio of the diameter of a horizontal cylinder in such interceptors to the incident wavelength is larger than 0.25,the wave force can be calculated by using the diffraction theory,by considering the problem as that of the interaction between the waves and a partially immersed large-scale horizontal *** this study,an analytical approach to calculate the wave force on a partially immersed large-scale horizontal cylinder was formulated by using the stepwise approximation *** model tests were conducted to investigate the effects of different factors(wave height,period,and immersion depth)on the wave force on a large-scale horizontal cylinder under conditions involving short-period *** results show that both horizontal and vertical wave forces on the cylinder increase as the wave height(immersion depth)increases in most *** vertical wave force decreases with the decrease of the *** the horizontal wave force,it increases with the decrease of the period when the wavelength is larger than the diameter of the cylinder and decreases with the decrease of the period when the wavelength is smaller than the diameter of the cylinder.

关键词： wave force large-scale horizontal cylinder diffraction theory partial immersion stepwise approximation method

Study on the Propagation and Focusing Mechanism of Long Waves over A Submerged Atoll

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China Ocean Engineering 2023年第2期37卷 204-217页

作者： FU Dan-juan LIU bi-jin ZHENG jin-hai WANG Gang CHEN bi-qin School of Civil Engineering and Architecture Xiamen University of TechnologyXiamen 361024China Hainan Institute Zhejiang UniversitySanya 572025China Key Laboratory of Coastal Disaster and Protection Ministry of EducationHohai UniversityNanjing 210098China Fujian Polytechnic of Information Technology Fuzhou 350003China

An analytical solution for long waves propagating over a submerged atoll is established. The atolls involved in this study are annular coral reefs with large lagoons in the middle, and the expression of the cross section is a trinomial function of the radial distance, i.e., h=ar(2s)-br~s+h_0, where s is the positive rational number. This analytical solution extends the theory by Wang et al.(2018) as s is no longer limited to s=2/m, where m is the positive integer. In addition, by adjusting the terrain parameters properly, the analytic solution can be degenerated to describe the wave propagation over topography with a hump or pit. According to the relationship between wave rays and wave energy, the distribution characteristics and formation mechanism of energy over the topography are expounded. When the lagoon is non-existent, all wave rays converge at the x-axis, which results in an abrupt amplification of the wave amplitude around the convergence point. When a lagoon is mounted on the top of the atoll, the rays are scattered due to the refraction of the lagoon, and only some rays converge at the symmetrical axis and the ridges on both sides,which results in the amplification of wave amplitudes in these areas.

关键词： long waves analytic solution wave scattering submerged atoll wave propagation

THE EFFECT OF SILICA MORPHOLOGY ON PROPERTIES OF PVA/SILICA NANO-COMPOSITES

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Chinese Journal of Polymer Science 2013年第11期31卷 1546-1553页

作者： Lei bi jin-wen Wang 陈枫傅强 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan University

Two kinds of poly（vinyl alcohol）（PVA）-silica composites were prepared with different methods. One composite was prepared by directly mixing PVA with 80 nm silica nano-particles which were made from tetraethoxysilane （TEOS）. The another was obtained by the mixing PVA and hydrolyzed TEOS in the presence of acid-catalyst. The properties of the two PVA/silica hybrids were characterized by means of scanning electron microscopy （SEM）, UV-Visible spectroscopy, solubility tests, limiting oxygen index （LOI） test, tensile test and dynamical mechanical analysis （DMA）, respectively. The results indicate that PVA-TEOS composites （PT for short） display more transparency than PVA-silica nano-particles hybrids （PS for short）. At the same time, The PT composites presented more excellent performance than PS in water resistance, fire resistance and mechanical properties. Moreover, the Tg of PT increased with increasing TEOS content, while that of PS decreased.

关键词： Silica Poly(vinyl alcohol) TEOS Network Nano-composite.

bioactive flavonoids in medicinal plants:Structure, activity and biological fate

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Asian Journal of Pharmaceutical Sciences 2018年第1期13卷 12-23页

作者： Tian-yang Wang Qing Li Kai-shun bi School of Pharmacy Shenyang Pharmaceutical University

Flavonoids, a class of polyphenol secondary metabolites, are presented broadly in plants and diets. They are believed to have various bioactive effects including anti-viral, antiinflammatory, cardioprotective, anti-diabetic, anti-cancer, anti-aging, etc. Their basic structures consist of C_6—C_3—C_6 rings with different substitution patterns to produce a series of subclass compounds, and correlations between chemical structures and bioactivities have been studied before. Given their poor bioavailability, however, information about associations between structure and biological fate is limited and urgently needed. This review therefore attempts to bring some order into relationships between structure, activity as well as pharmacokinetics of bioactive flavonoids.

关键词： Flavonoid Activity Structure Pharmacokinetics bioavailability

A novel norsesquiterpene alkaloid from the mushroom-forming fungus Flammulina velutipes

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Chinese Chemical Letters 2013年第1期24卷 57-58页

作者： Zhen-Yu Xu Zhi-Ang Wu Kai-shun bi School of Business Administration Shenyang Pharmaceutical University Center for Drug Evaluation SFDA

A new norsesquiterpe alkaloid （1） was isolated from the solid culture of mushroom-forming fungus Flammulina velutipes fermented on rice. The structure of I was elucidated by spectroscopic methods. The absolute confi... 详细信息

关键词： MushroomNorsesquiterpeneFlammulina velutipesCytotoxicity