铬天青S分光光度法测定食物中铝时高氯酸根的干扰及其消除

研究了铬天青S分光光度法测定铝时,样品消化液中残留高氯酸根的干扰及其消除方法,用阴离子交换树脂将样品消化液中残留的高氯酸根交换去除。结果表明,样品经过阴离子交换树脂柱后,高氯酸根基本去除,不再产生混浊,且铝的回收率达90%。该法简便可行,提高了铝测定的准确度。     

Photoluminescene study acceptor defects in lightly doped n type GaSb single crystals

Lightly Te-doped GaSb samples grown by the liquid encapsulated Czochralski(LEC) method have been studied by Hall measurements and low-temperature PL spectroscopy. The results suggest that acceptor-related antisite is the dominant defect in n-type GaSb with low Te-doping concentration. As the Te concentration increases, gallium vacancy related defects become the main acceptor. A new band of around 665 meV is observed in the GaSb sample with the lowest Te-doping concentration. The variation of the acceptor defects and their influence on the electronic and optical property on the n-GaSb single crystal are discussed based on the results.     

Performance improvement of c-Si solar cell by a combination of SiNx/SiOx passivation and double P-diffusion gettering treatment

SiN_x/SiO_x passivation and double side P-diffusion gettering treatment have been used for the fabrication of c-Si solar cells. The solar cells fabricated have high open circuit voltage and short circuit current after the double P-diffusion treatment. In addition to better surface passivation effect, SiN_x/SiO_x layer has lower reflectivity in long wavelength range than conventional SiN_x film. As a consequence, such solar cells exhibit higher conversion efficiency and better internal quantum efficiency, compared with conventional c-Si solar cells.     

中医补肾壮骨理论与微量元素

探讨了中医理论与微量元素的关系，重点介绍了补肾药和肾主骨主生长发育的理论与微量元素的关系。为中医随证配伍选药提供了理论基础。     

内毒素性休克时血清的特异荧光研究

本文以大肠杆菌内毒素攻击介导的感染性多系统脏器功能衰竭家兔为模型，探讨了血清的特异荧光。应用发光理论讨论了模型血清的分子光谱，以及感染性多脏衰竭进程与特异荧光的关系。同时，还制定了血液、心、肝、肺、肾各组织器官中脂过氧化物代谢产物丙二醛和超氧化物歧化酶变化情况，结果具有明显的相关性和一致性。荧光法可作为感染性多脏器衰竭的早期诊断预示的一种方法。     

The enthalpies of dilution of pyridine and methylpyridine at 298.15 K

The enthalpies of dilution of aqueous solutions for pyridine and methylpyridine isomers have been determined with a 2277-Thermal Activity Monitor at 298.15 K. The results have been treated using the excess function concept and homotactic interaction coefficients have been obtained. The homotactic enthalpic pairwise interaction coefficients are discussed qualitatively in terms of substitution effects of methyl group introduced into the pyridine ring.     

基于机器学习对三角堰流量系数的预测研究

为了准确高效得出三角堰泄流系数的大小，本研究基于广义神经网络、最小二乘支持向量机和遗传规划对三角堰流量系数进行智能建模．将无量纲参数堰顶角、弗劳德数、堰顶长与堰高之比、堰顶长与堰顶水深之比作为模型输入参数，流量系数作为模型输出参数．研究表明，最小二乘支持向量机性能优于广义神经网络和遗传规划．在测试阶段，均方根误差为0.000 73，散射指数为0.001 02，决定系数为0.999 59，最大误差为1.7 %．该模型精度较高，预测值较准确，具有较强的工程适用性．本研究通过对三角堰流量系数进行智能建模，采用机器学习对非线性物理关系进行高精度拟合，准确高效得出三角堰流量系数的大小，可为水利水电工程设计人员和我国灌区精确量水用水提供一种新的方法和思路．     

Designing Superresolution Optical Pupil Filter with Constrained Global Optimization algorithm

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