Progress on Fucoxanthin and Fucoxanthin-chlorophyll Protein （ FCP） Complexes

岩藻黄素又称岩藻黄质,是广泛存在于海洋藻类中的一种光合色素,为类胡萝卜素的含氧衍生物。岩藻黄素-叶绿素蛋白复合体(FCP)是由岩藻黄素和叶绿素共同组成的高效捕光蛋白复合物。主要综述了岩藻黄素的理化性质、生物活性、和提取方法以及FCP的功能、结构和提取方法

1976 Vol. 24 Number 11

https://engagedscholarship.csuohio.edu/lawpublications_gavel1970s/1100/thumbnail.jp

中国の有機食品発展の現状と貧困削減へ向けて

グリーン・イノベーション以降、大量の化学肥料や農薬による環境汚染は加速しており、農薬の品質降下問題も一向に改善が見られない。合理的な資源運用及び環境保護は極めて重要であり、安全第一へ向けた有機農薬への取り組みは世界的なトレンドとなっている。中国の有機農業は近年急速な発展を見せており、農地面積および生産高は上昇を続け、高品質な農業製品の産出においても重要な役割を担うようになった。また、農村の経済発展においても有機農業は大きな貢献を見せている。有機農業の視点から農村・貧困地域の経済発展を考えることは社会的背景に則った効果的な貧困対策である。本稿では2015-2018 年の有機農業におけるデータをベースに、中国有機農業の現状、そして農村の貧困問題に対して分析を行う。また、農村における有機農業の発展可能性および重要性に対して考察し、有機農業と貧困削減を結び付けた3つの発展モデルの提言を行う

基于H桥及SPWM调制的大功率交流恒流源

针对交流恒流的使用要求,提出了一种采用不对称规则采样法SPWM大功率恒流源实现方案,给出了相应的SPWM算法和硬件电路设计,实验结果表明,该方案具有速度快、精度高等特点

基于像素差值的非接触位移测量技术研究

针对接触式位移测量系统中,由于存在磨损或打滑等原因造成精度降低的现象,利用图像传感器,通过比较前后两帧图像像素差值的方法设计了一种非接触式位移测量系统。着重分析了该系统的测量精度,指出了非接触式测量误差的主要来源,并给出解决方案。实验结果表明,该方法可在10CM垂直距离上测量位移,平均测量误差仅有0.208%

A method of SOC-estimate based on forecast of open-circuit voltage

【中文摘要】 估算锂离子动力电池荷电状态(SOC)是电池管理的一个难点,通过对电池放电曲线及恢复曲线分析,拟合出电池开路电压的计算公式,解决了动态情况下预测电池开路电压的问题,使开路电压估算SOC在电动车上使用成为可能。本文采用建立电池模型的方法,通过实验所得数据对模型进行曲线拟合,得到最优参数,并通过另外几组数据进行验证。实验结果表明,采用本方法预测精度为0.02%。 【英文摘要】 Estimate SOC of lithiun ion battery is a difficult point of battery management.This paper gives the formula of open-circuit voltage through analysing discharge curve and recovery curve,resolve the problem of forecasting open-circuit voltage,make estimate of SOC through open-circuit voltage possible.This paper uses the method of establishing battery model,use the data to make curve-fitting,and get the optimal value,the prove it with other data.The results of experiment proved that forecast accuracy is 0.02% ..

The shape transformation of Si patterned-substrate in thermal decomposition of native oxide during vacuum annealing

利用超高真空化学气相淀积(uHV/CVd)系统,在不同的温度、环境氛围及脱O过程参与等条件下对全息法制备的二维周期图形SI衬底进行退火,通过原子力显微镜(AfM)进行表征与分析,研究真空高温脱O过程对图形衬底表面形态变化的影响。结果表明,真空环境使衬底表面的SI原子可以自由运动,脱O过程增强了SI原子在表面的迁移,温度会影响SI原子的扩散速率,3个因素的共同作用导致图形深度变浅,侧壁坡度变缓。此外,在周期图形台面的边缘,观察到环形有序分布的纳米SI岛。2D-period patterned Si substrate is annealed in ultra-high vacuum chemical vapor deposition(UHV/CVD)under variational conditions including different temperature,environment,thermal decomposition of native silicon oxide.The morphology properties of annealed patterned-substrate are obtained by atomic force microscopy(AFM).The effect of annealing parameters on shape transformation of Si patterned-substrate is studied.The results indicate that the Si atoms can diffuse freely on substrate surface in vacuum and the diffusion is enhanced during thermal decomposition of native oxide.The diffusion velocity is affected by temperature.These effects result in the decrease of the depth of pattern and gradient of side wall.In addition,ordered nanometer Si islands are formed on the mesa of patterned-substrate.国家自然科学基金资助项目(60336010;60676027);国家重点基础研究发展计划“973”资助项目(2007CB613404

Fabrication and characteristics of Si-based Ge waveguide photodetectors

以外延gE薄膜为吸收区,在SI基上制备了gE波导光电探测器。利用超高真空化学汽相淀积(uHV/CVd)设备,采取低温高温两步法,在SI(100)衬底上外延出厚度约为500nM的高质量纯gE层。探测器采用脊型波导结构,Al电极分别制作在波导的台面上下形成背对背肖特基结。I-V特性测试表明,在-1V偏压下,暗电流密度为0.2MA/CM2。由于SI与gE热失配引起外延的gE薄膜受到0.2%张应变,减小了gE带隙,光响应波长范围扩展到1.60μM以上。在70MW、1.55μM入射光照射下,测得光电流比暗电流高出近1个数量级。A Si-based Ge waveguide photodetector was fabricated and characterized.High-quality tensile strained Ge layer(about 500nm)was epitaxially grown on a Si(100)substrate by low-and high-temperature two-step growth method in ultrahigh vacuum chemical vapor deposition.Two metal-germanium schottky junctions on and under the waveguide were fabricated to form metal-germanium-metal photodetector and the dark current density of 0.2 mA/cm2 at the bias of-1 V is obtained.The photocurrent response in the wavelength range expands to 1.6 μm due to the 0.2% tensile strain in the Ge layer and the photocurrent is higher in one order magnitude than the dark current at 1.55 μm.国家自然科学基金资助项目(60676027);国家重点基础研究发展计划“973”资助项目(2007CB613404);国家自然科学基金委重点基金资助项目(60837001);福建省重点科技资助项目(2006H0036

High efficient and secure group key management scheme based on optimized GDH

针对gdH(grOuP dIffIE-HEllMAn)方案中节点可能成为系统的瓶颈以及计算复杂度、通信代价和存储复杂度远高于某些集中式方案等缺陷,提出并实现了一种基于优化gdH协商的高效安全的动态群组密钥管理方案,并对其安全性进行了证明。通过对计算量和通信量进行分析比较表明,优化gdH协商协议具有很大的优势,并且能够快速产生或更新组密钥,具有很强的实用性。There are some defects in GDH(group diffie-hellman) scheme,such as the node that may become the bottleneck of the system,and the computational complexity,cost of communications and storage complexity that are much higher than some centralized group key management program.An efficient and secure dynamic group key management scheme based on optimized GDH is proposed and implemented and its security is proven.The optimized GDH consensus agreement has great advantage than GDH by comparing and analysing the volume of calculating and traffic.At the same time,the optimized GDH consensus agreement can quickly produce and update group key,and it owns highly practicability.国家自然科学基金资助项目(60873179);广西教育厅科研资助项目(200707LX196

Characterizing Nitrogen Saturation of the Wuchuan Headwater Stream in the Southeast of China

以九龙江流域典型的农业源头溪流——五川溪为研究区域,开展每月一次共2年的nO3-采样用于溪流氮饱和特征的研究.结果表明,2005年和2007年溪流的nO3-浓度分别为35.5~319.5μEQl-1和5.0~353.6μEQl-1,根据STOddArd和TrAAEn提出的氮饱和划分准则,五川流域分别处于氮饱和阶段2/3和阶段2,接近氮饱和.氮饱和阶段随着nO3-浓度的增加而上升,五川溪流的氮饱和阶段存在着时间上的变化.河流生态系统中氮负荷增加,使河流达到氮饱和状态,并最终改变溪流系统硝化和反硝化等氮的生物地球化学循环过程.随着nO3-浓度的增加,五川源头溪流已成为流域内重要的nO3-源.NO3-concentrations sampled monthly in the Wuchuan stream,which is a small agricultural headwater stream in the southeast of China,within two years,were used to study the stream′s nitrogen saturation characteristics.Results showed that NO3-concentrations varied from 35.5 to 319.5 μeqL-1 in 2005 and from 5.0 to 353.6 μeqL-1 in 2007.And,according to the criteria proposed by Stoddard and Traaen,the nitrogen saturation status of the stream was at stage 2 or 3,and stage 2,respectively.Both stages were closed to saturation.It was found that the saturation stage would increase with the NO3-concentration,which caused the change of nitrogen saturation stage in the Wuchuan stream over time.The increasing of nitrogen loadings has led to the stream nitrogen saturation and eventually can alter nitrification,denitrification and other nitrogen biogeochemical cycles in the stream ecosystem.国家自然科学基金资助项目(41175130);教育部新世纪优秀人才支持计