熔体旋淬MI（NiCoMnAl）5贮氢合金的组织结构与电化学特性

对比研究了熔体旋淬和常规熔铸Ml(NiCoMnAl)     

A digital filtering scheme for SQUID based magnetocardiography

Considering the properties of slow change and quasi-periodicity of magnetocardiography (MCG) signal, we use an integrated technique of adaptive and low-pass filtering in dealing with two-channel MCG data measured by high $T_{\rm c}$ SQUIDs. The adaptive filter in the time domain is based on a noise feedback normalized least-mean-square (NLMS) algorithm, and the low-pass filter with a cutoff at 100Hz in the frequency domain characterized by Gaussian functions is combined with a notch at the power line frequency. In this way, both relevant and irrelevant noises in original MCG data are largely eliminated. The method may also be useful for other slowly varying quasi-periodical signals.     

X-ray observations of tungsten wire array Z-pinch implosions on QiangGuang-1 facility

Z-pinch experiments with two arrays consisting, respectively, of 32 4-μm- and 6-μm-diameter tungsten wires have been carried out on QiangGuang-1 facility with a current rising up to 1.5MA in 80ns. At early time of implosion, x-ray framing images show that the initial emission comes from the central part of arrays, and double clear emission rings, drifting to the anode and the cathode at 5×10⁶cm/s and 2.4×10⁷cm/s respectively, are often produced near the electrodes. Later, in a 4-μm-diameter tungsten wire array, filamentation caused by ohmic heating is prominent, and more than ten filaments have been observed. A radial inward shift of arrays starts at about 30\,ns earlier than the occurrence of the x-ray peak power for both kinds of arrays, and the shrinkage rate of emission region is as high as 1.7×10⁷cm/s in a 4-μm-diameter tungsten wire array, which is two times higher than that in a 6-μm one. Emission from precursor plasmas is observed in implosion of 6-μm-diameter tungsten wire arrays, but not in implosion of a 4-μm-diameter tungsten wire array. Whereas, in a 4-μm-diameter tungsten wire array, the soft x-ray emission shows the growth of m=1 instability in the plasma column, which is caused by current. The reasons for the discrepancy between implosions of 4-μm- and 6-μm-diameter tungsten wire arrays are explained.     

黄花倒水莲皂甙Reinioside C在大鼠体内代谢产物的鉴定

为了探讨五环三萜皂甙ReiniosideC在大鼠体内代谢产物的结构,单剂量口服ReiniosideC,5h后放血处死,用制备型高效液相色谱方法对血液和各脏器进行提取分离,从大肠内容物和粪中,分离得到了7种代谢产物.用FAB-MS,¹H NMR和¹³C NMR方法鉴定了它们的结构.     

Enhanced pulse compression induced by the interaction between the third—order dispersion and the cross—phase modulation in birefringent fibres

In this paper,we report on the enhanced pulse compression due to the interaction between the positive third-order dispersion (TOD) and the nonlinear effect (cross-phase modulation effect) in birefringent fibres.Polarization soliton compression along the slow axis can be enhanced in a birefringent fibre with positive third-order dispersion,while the polarization soliton compression along the fast axis can be enhanced in the fibre with negative third-order dispersion.Moreover,there is an optimal third-order dispersion parameter for obtaining the optimal pulse compression.Redshifted initial chirp is helpful to the pulse compression,while blueshifted chirp is detrimental to the pulse compression.There is also an optimal chirp parameter to reach maximum pulse compression.The optimal pulse compression for TOD parameters under different N-order solitons is also found.     

一种由自由电子能带模型计算费米能级的方法

对面心立方（fcc)、体心立方（bcc)和六角密堆积（hcp)三种不同结构的晶体,在假设它们的原胞中包含8个价电子并将价电子近似为自由电子的情况下,采用“自由电子气理论”和“自由电子能带模型”,研究其根据费米球确定的费米能级EF与根据自由电子能带模型计算的平均键能Em。研究结果表明,由自由电子能带模型计算所得3种不同结构晶体（因而电子密度也不一样）的平均键能Em等于各自自由电子系统的费米能级EF。平均键能Em是我们在异质结带阶理论计算中建议的一种参考能级,研究结果在深化对平均键能Em物理实质认识的同时,提供了一种借助于自由电子能带模型计算自由电子系统费米能级EF的新方法。     

瓶颈开口角对二维颗粒流的影响

实验研究了平面传送带上颗粒流的特性，主要包括传送带出口处开口宽度以及瓶颈开口角度对颗粒流的影响.实验结果发现，改变瓶颈开口角度θ，当θ大于15°时，颗粒流量Q随着cosθ呈线性变化.同时，颗粒流量Q与传送带速度v以及开口大小R也密切相关，而在θ小于15°时，颗粒流量Q基本不随开口角度变化.     

强光一号装置单氘丝中子发射实验研究

 介绍了利用飞行时间技术测量Z箍缩装置单氘丝中子发射。实验发现,Z箍缩中子发射过程中,伴随产生很强的硬X射线,利用铝丝阵产生硬X射线的实验,建立较好的硬X射线屏蔽,大大减弱了它的辐射强度。所采用的双闪烁探测器中子探测系统,进行了3个发次的单氘丝负载实验,确认产生了聚变氘氘中子。4172发次实验测量结果表明,中子产额1.5×10⁹,中子能量为(2.45±0.26) MeV。实验结合分幅照相数据分析认为,峰电流和负载未能很好匹配,等离子体存在不稳定现象。     

AB5型储氢合金的高倍率放电性能及机制

本文研究了储氢合金表面处理，粒度分布，稀土组成和添加剂硼对储氢合金高倍率放电性能的影响及机制的探讨。采用物理方法和化学方法对储氢合金进行表面处理，提高了合金表面电化学反应速度，同时促进了氢原子在合金本体中的扩散，从而改善了合金的活化性能、放电容量和高倍率放电能力。储氢合金粉粒度太粗和太细都使合金电极阻抗增大，导致放电容量和高保率放电能力下降，而且大电流放电平台也较低，选择合适的储氢合金粉粒度分布既可提高合金的活性和放电容量又能改善合金高倍率放电能力。随着合金中La含量的增加和Ce含量的减少，提高了合金的表面活性，使合金的大电流放电性能得到改善。储氢合金中加入元素B，使合金易粉化并形成少量的第二相，不但改善了合金的活性和放电容量而且显著地提高了合金高倍率放电能力。     

环状二苯基碘盐的合成、表征与应用——综合性多步有机合成实验*

介绍了以2-碘苯胺和苯硼酸为原料,通过Suzuki偶联反应、重氮化反应、氧化反应等3步合成环状二苯基碘盐,并进一步应用于二苯并噻吩的合成。本实验涉及有机化合物的合成、结构表征以及应用,将有机化学基础理论知识、基本实验技能与学科研究热点相结合,能够有效培养学生的科学研究素养。该实验牵涉到气相质谱、核磁及熔点仪等仪器的使用,锻炼学生动手操作仪器的能力及综合实验技能,适合作为高年级学生的综合实验。