少精、弱精不育症患者精液中微量元素含量的测定分析

用ICPOES法检测了54例男性少精、弱精不育者精液中Ca、Cd、Cu、Fe、Mg、Mn、Ni、Zn元素的含量,并对相关含量进行数据分析。结果表明,精液中微量元素含量的改变是影响精液质量的重要原因之一。     

Synthesis,crystal structure,and third-order nonlinear optical properties of a copper(I) one-dimensional coordination polymer

A copper(I) thiocyanate coordination polymer [Cu(Phen)(μ-NCS)]n (I) (Phen = 1,10-phenan-throline) has been synthesized by the low-temperature solid-state reaction. Single-crystal X-ray analyses reveal that compound I possesses a type of one-dimensional (1D) framework structure. Polymer I was characterized by elemental analyses, IR spectra, and UV-visifele spectra. The third-order nonlinear optical properties were also investigated, and they exhibit good nonlinear absorption and self-defocusing performance with modulus of the hyperpolarizability 4.94 × 10⁻³⁰ esu for I in a 6.35 × 10⁻⁴ mol dm⁻³ DMF solution.     

利用TeO2减少多模光纤出射场散斑干扰的研究

 为了减少多模光纤出射光场的散斑干扰,提出了把声光布拉格衍射效应所形成的不同衍射级耦合到多模光纤中,由于衍射级具有不同的偏振态,消弱了光场相干条件,进而在出射光场中消弱了散斑场的对比度,并通过对改变声场频率后得到的散斑场对比度的分析,证实了利用各向异性晶体TeO2能够控制散斑场对比度,改善出射场的高斯分布,得出了可以利用布拉格衍射效应减少散斑场干扰的可能性。     

Optimizing fracture design based on a novel RBF neural network

The factors affecting performance of fractured wells are analyzed in this work. The static and dynamic geologic data of fractured well and fracturing treatment parameters obtained from 51 fractured wells in sand reservoirs of Zhongyuan oilfield are analyzed by applying the grey correlation method. Ten parameters are screened, including penetrability, porosity, net thickness, oil saturation, water cut, average daily production, and injection rate, amount cementing front spacer, amount sand-carrying agent and amount sand. With the novel Radial Basis Function neural network model based on immune principles, 13 parameters of 42 wells out of 51 are used as the input samples and the stimulation ratios as the output samples. The nonlinear interrelationship between the input samples and output samples are investigated, and a productivity prediction model of optimizing fracture design is established. The data of the rest 7 wells are used to test the model. The results show that the relative errors are all less than 7%, which proves that the novel Radial Basis Function neural network model based on immune principles has less calculation, high precision and good generalization ability.     

Sr0.6Ba0.2Ca0.2Al2O4 ∶Eu,Dy的制备与长余辉发光性能研究

采用高温固相法制备了Ca,Ba共掺的Sr_0.6Ba_0.2Ca_0.2Al₂O₄ ∶Eu²⁺_0.01, Dy³⁺_0.02和单掺Ba的Sr_0.6Ba_0.4Al₂O₄ ∶Eu²⁺_0.01, 关键词： 长余辉 铝酸锶 稀土掺杂 陷阱能级     

2,2′-Biimidazole as an Efficient Ligand for Copper(I)-Catalyzed C‒N Coupling Reactions

An efficient copper(I)-catalyzed system using 2,2′-biimidazole as the ligand was applied to N-arylation of a broad spectrum of nitrogen nucleophiles with aryl halides. The reactions were carried out in relatively mild conditions with good to excellent yields.     

γ射线辐照对a-SiC:H薄膜结构与特性的影响

 采用射频（13.56 MHz）反应溅射方法制备a-SiC:H 薄膜，并将其在空气中进行高能γ射线(平均为1.25 MeV)辐照，5个样品的吸收剂量分别为0，2×10⁴，4×10⁴，6×10⁴，8×10⁴ Gy。采用拉曼及红外光谱对薄膜的结构进行表征,得到了其结构与特性的变化规律。研究与分析表明：随样品吸收剂量的增加，陷入空穴中的电子会被激发，a-SiC:H薄膜中的SiC成份增加，电阻率变小，数量级为105Ω·cm；薄膜存在结晶化的趋势,其主要原因在于由Si－O－Si键断裂而产生的Si取代膜中C－C键中的C而形成晶态SiC，在此过程中出现了Si－O－Si键及a-SiC:H的减少，晶态SiC的增加。经γ射线辐照后薄膜的氢含量降低，折射率从5.19增大到5.53，辐照后薄膜的透过率均低于原膜的透过率。在500~2 300 cm^-1(对应波长为20.00~5.29 μm)波段内，a-SiC:H薄膜存在一定的增透作用。     

Pontrjagin空间上一般算子代数弱闭和一致闭的等价条件

本文研究Pontrjagin空间上一般算子代数弱闭和一致闭的等价条件,得到定理:设C0(U),C1(U,L,R,D,V),C2a(U),C2b(U,R),C3a(U),C3b(U,R)分别是Ⅱk空间上第0,Ⅰ,Ⅱa,Ⅱb,Ⅲa和Ⅲb类的算子代数,则(1)C0(U),C2a(U)或C3a(U)为一致闭(弱闭)的等价条件是U是Hibert空间G上的C*-代数(W*-代数;(2)C1(U,L,R,D,V)为一致闭(弱闭)的等价条件是U是Hibert空间H上的C*-代数(W*-代数),并且R是闭子空间,V是闭算子,L对称闭的;(3)C2b(U,R)或C3b(U,R)为一致闭(弱闭)的等价条件是U是Hibert空间H上的C*-代数(W*-代数),并且R是闭子空间．