超宽带电磁脉冲与地雷耦合的数值模拟

 用数值方法研究了超宽带电磁脉冲与地雷耦合问题。验证了截断有耗边界的完全匹配层方法，给出了超宽带信号经天线发射后在不同距离处的辐射场。通过数值模拟，给出了不同作用距离和作用角条件下地雷体内的耦合电磁场。     

毛细管放电X光激光装置中的预脉冲电源

针对目前毛细管放电X 光激光装置产生的预脉冲电流幅值过大、持续时间较短的问题，提出了增加预脉冲开关抑制原有预脉冲，再外加由脉冲成形网络组成的预脉冲发生器，产生所需预脉冲的改造方案。可在主脉冲来临之前产生幅度10~50A，持续时间约17μs的方波预脉冲电流，来满足毛细管放电泵浦类氖氩X光激光实验的需要。     

Comparative analysis of the main active components and hypoglycemic effects after the compatibility of Scutellariae Radix and Coptidis Rhizoma

In this study, a rapid and highly sensitive ultra high performance liquid chromatography with triple quadrupole mass spectrometry method with the mobile phase of acetonitrile and 0.1% aqueous formic acid was established and successfully applied to comparatively analyze main active components after their compatibility. Besides, the effects of Scutellariae Radix, Coptidis Rhizoma and combined extracts on type 2 diabetic rats induced by high‐fat diet along with low dose of streptozocin were investigated. Under the optimized chromatographic conditions, good separation of seven target components was achieved within 12 min. All calibration curves exhibited good linearity (R² ≥ 0.999). The relative standard deviation of precision, repeatability and stability varied from 0.69 to 2.23, 0.98 to 2.56, and 0.92 to 2.57%, respectively. The recovery ranged from 91.11 to 105.35%. The contents of seven active components were notably reduced after compatibility; however, the hypoglycemic effect of combined extracts was stronger than single drug by decreasing the activities of fructose‐1,6‐bisphosphatase, glucose 6‐phosphatase, phosphoenolpyruvate carboxykinase and increasing the activities of glucokinase, phosphofructokinase, pyruvate kinase. Accordingly, the established analytical method was accurate and sensitive enough for quantitative evaluation of seven investigated compounds. Moreover, the combined extract had definite effects on type 2 diabetes through multiple components against multiple targets.     

氦原子(e,2e)反应中末通道屏蔽效应的理论研究

在Chen等人工作(2001,Chin. Phys. 10 290)的基础上,进一步对(e,2e)反应的末态He+中核外电子的有效屏蔽给出修正.并用修正后的索末菲参量计算了入射能为40 eV时,共面不对称几何条件下电子离化He原子的三重微分截面.所得结果与其它理论结果及最新绝对测量的实验数据进行比较发现:所得到的理论曲线更接近实验数据.     

激光触发多级多通道开关研究

 研究了200kV激光触发多级多通道开关的运行机理，该开关在直流电压下以四倍频Nd:YAG激光器为触发源进行的实验结果表明：开关触发延迟时间及其抖动随开关电压、激光能量和充气压力上升呈指数下降趋势，对混合气体则随气体密度上升而上升。随透镜焦距的增大延迟时间及其抖动呈上升趋势。该开关实现了多通道放电。     

CeF3闪烁探测器对DD中子的相对灵敏度

 用国内近年新研制的CeF₃闪烁体和常用闪烁体ST401分别配特性相同的光电倍增管，构成两种闪烁体探测器，在强度不随时间变化的DD中子源场中测量了这两种闪烁探测器的相对灵敏度，测量结果表明：CeF₃闪烁探测器对DD中子的灵敏度比同尺寸ST401的灵敏度低一个量级以上。     

地表振动传感器质量对水平耦合谐频的影响*

使用振声法探测埋地物体时,表层土壤松软导致地表振动传感器在耦合环节发生谐振, 造成谐频附近的信号失真,限制了所采信号的可用频段。针对传感器在水平方向的耦合谐振问题,该文研究了传感器质量对谐振频率的影响。仿真对比了传感器质量为2~250 g情况下信号采集系统的频响特征,并在季节性的冻土地表开展了对比实验与横波波速测量实验。仿真与实验结果表明：250 g传感器所对应的耦合谐频不超过800 Hz;2 g传感器的耦合谐频可超过1200 Hz;传感器质量越轻,耦合谐振频率越高,所采信号的可用频段越宽。     

真压缩算子解析函数的优势原理

发展了Ky Fan中定理4的结果,对复的Hilbert空间H上的真压缩算子A和单位圆盘△内的解析函数f给出了优势原理,与文比较,本文去掉A为正规算子的限制,并改进了相应的结果,对H（△）的某个子类中的f,给出‖f′（A）‖的估值,并讨论了从属关系的优势原理,特别是把Shah-Goluzin关于从属于单叶函数的优势半径拓广到算子函数。     

蛋白质碘化汞代烟酸-N-丁二酰亚胺酯的合成

肿瘤体内诊断和治疗中 ,不管是采用氯胺———Ｔ ｌｏｄｏｇｅｎ[1] 的直接标记法 ,还是Ｂｏｌｔｏｎ Ｈｕｎｔｅｒ[2 ] 试剂的间接标记法制备的放射性碘化蛋白质、存在一个主要问题 ,是它们在体内较快脱碘并使放射性碘被甲状腺所摄取。脱碘的产生被认为是这些碘酚基与甲状腺素存在类似结构以及放射性碘在芳环的取代位置。Ｚａｌｕｔｓｋｙ的研究指出 :用三正丁基锡苯甲酸 Ｎ 丁二酰亚胺酯为碘化试剂[3 ,4 ] 可解决此类问题 ,但该试剂合成相当复杂 ,因而探索合成类似化合物的简单途径很有意义。选用烟酸为原料合成的偶联剂氯化汞代烟酸 Ｎ …     

Multiconfigurational study on the synchronous mechanisms of the ClO self-reaction leading to Cl or Cl<Subscript>2</Subscript>

For studying the adiabatic and nonadiabatic mechanisms of the ClO (X ²Π) + ClO (X ²Π) → ClOOCl → 2Cl (² P _u) + O₂ (X ³Σ _g ⁻) reaction (1) and the ClO (X ²Π) + ClO (X ²Π) → ClOOCl → Cl₂ (X ¹Σ _g ⁺) + O₂ (X ³Σ _g ⁻) reaction (2), we calculated, by partial geometry optimizations under the C₂ constraint, the O–O and O–Cl dissociation potential energy curves (PECs) from the five low-lying states of ClOOCl at the CASPT2 level. The CASSCF minimum-energy crossing point (MECP) between the potential energy surfaces of the 1 ¹A ground state [correlating with the product of reaction (1)] and the 1 ³B state [correlating with the product of reaction (2)] states was also determined. Based on the CAS calculation results (PECs, energies, and spin–orbit coupling at the MECP), we predict that reaction (1) occurs along pathway 1: ClO (X ²Π) + ClO (X ²Π) → ClOOCl (1 ¹A) → 2Cl (² P _u) + O₂ (X ³Σ _g ⁻) and that reaction (2) occurs along pathway 2: ClO (X ²Π) + ClO (X ²Π) → ClOOCl (1 ¹A) → 1 ¹A/1 ³B MECP (142.4 cm⁻¹) → ClOOCl (1 ³B) → Cl₂ (X ¹Σ _g ⁺) + O₂ (X ³Σ _g ⁻). The needed energies (relative to the reactant) for pathways 1 and 2 are predicted to be 5.3 and 11.1 kcal/mol, respectively, which indicates that reaction (1) is more favorable than reaction (2). The present work supports the traditional photochemical model for ozone degradation: ClOOCl (1 ¹A), formed by two ClO (X ²Π), can directly produce O₂ plus two Cl atoms.