关于非线性规划问题的组合同伦内点法

文[1]在条件(C1)、(C2)和(C3)之下，利用组合同伦内点法讨论了非凸非线性规划问题K—K—T点的存在性，本文对条件(C2)和(C3)进行了改进和处理。     

Synthesis of some new germasesquioxides by intramolecular catalytic Mannich-type reactions

A convenient procedure for the preparation of some new germasesquioxides containing phosphonyl groups carried by an intramolecular catalytic Mannich-type reaction is reported.     

异核过渡金属簇合物(Et_4N)_4〔MoS_4Cu5_Br_(2.11)I_(4.89〕的固相合成和晶体结构

（NH4）2MoS4、CuBr和Et4NI的固态反应得到簇合物（Et4N）4[MoS4Cu5Br2．11－I4．89]。晶体学数据：Mr＝171819，单斜品系，空间群C2／c，晶胞参数结构分析表明：标题化合物是一具有C2对称性的孪合开口类立方烷。     

INFLUENCE OF HIGH PRESSURE ON EMISSION SPECTRA AND CRYSTAL FIELD STRENGTH FOR Eu3+ IN GdOBr

The emission spectra of the Eu³⁺ion in GdOBr∶Eu³⁺ were measured in the range of pressure from 0 GPa to 12.4 GPa. The energy level schemes establis hed from the spectra show that the splittings of the ⁷F₁,⁷F₃ and ⁵D₁ multiplets decrease obviously with increasing pressure. The crystal-field parameters B^k_q and the crystal-field strength parameter S versusB^k_q were determined at different pressures. With pressurization S reduces and theJ-mixings of the state functions for the Eu³⁺ ion decrease, which is in agreement with the decrease of the multiplet splittings. This shows that for Eu³⁺ in REOX∶Eu³⁺ the diminution of the crystal-field strength with pressure, the authenticity of which is under suspicion for several years, is certain.     

基于SPA联系数的大连产业结构演化规律研究

SPA联系数是把研究对象各种测度联系起来加以系统性地描述、计算、分析的一种结构函数,其一般形式为a+bi+cj,用于城市第一产业、第二产业、第三产业相互联系和演化规律的研究有其合理和创新之处,其特点是把城市第一产业、第二产业、第三产业看成一个系统.用于大连产业结构演化规律研究后发现,大连市在1978~1999年20年间经历了稳定——剧烈调整——稳定这样三个阶段.在今后的10~20年间,对于第三产业的投资仍将处在首位.     

路政应急管理中资源布局的混合整数规划模型

本文根据道路灾害事故的发生特点,对城市路桥养护系统的运行模式和资源的合理调用机理进行分析,考虑到事发地点潜在的资源需求概率,建立资源布局的混合整数规划模型.本模型中资源布局方案的调度决策基础是在灾害事故的资源需求不发生变化的条件下,使得每个救助点的资源同时部分地为辖区内现有事故和潜在事故服务,而现有事故的剩余需求由其他救助点派出资源来满足.该模型的目标是解决城市中因同一时间段内发生两起灾害事故而造成路桥破坏导致的救助资源短缺问题,同时避免资源的闲置浪费.最后,通过算例证明,本方法较通常方法对城市总的资源配置量大大减少.     

Ionic conductivity enhancement during pre-crystallization in amorphous lithium ionic conductor Li2B2O4

It is found from the temperature dependence of the ionic conductivity of amorphous Li₂B₂O₄ that the ion transport process is rather complicated. At temperature below T_k (≈310°C), the ionic conductivity obeys an Arrhenius relation. Above the crystallization temperature T_c (≈410°C) ion transport is dominated by the process in the crystalline state. In between the ionic conductivity is anomalously enhanced. In this pre-crystallization range two distinguishable steps with a transition temperature at T_p (≈380°C) can be identified. At temperature between T_k and T_p, the conductivity increase is due to the redistribution of free volume. For temperature between T_p and T_c the specimen contains a small amount of crystallites but the crystallinity is less than 5%. The ⁷Li NMR spectra show that the line shape of partially crystallized amorphous material is quite similar to that of LiCl containing DSPP but in this case the second-phase particles are crystallites of the parent material.     

含铝炸药水下爆炸性能的实验研究

对RS211、HL-1、HL-2这3种含铝炸药和TNT炸药进行了水下爆炸实验,测量了4种炸药水下爆炸冲击波压力剖面和气泡脉动周期,获得了4种炸药水下爆炸冲击波的峰值超压、冲量、能量和气泡能。实验结果表明,在所研究的范围内,与TNT炸药相比,含铝炸药的冲击波能量有明显增加,约为TNT炸药的1.20～1.35倍,气泡能有显著增加,约为TNT炸药的1.50～2.30倍,表明在炸药中加入铝粉对于提高炸药水中爆炸威力是有益的。     

PVDF压电计的动态响应特性及其在橡胶材料SHPB实验中的应用

通过夹心式PVDF(Polyvinylide Fluoride)压电计的动态分离式Hopkinson压杆(SHPB)标定实验,系统地讨论了传感器的动态响应特性,其中包括测量电路、PVDF表面应力集中、压电计的材料及结构特性和同一压电计受多次撞击对测试信号的影响,为PVDF压电计的制作工艺研究提供参考。利用标定好的压电计测试了橡胶材料在SHPB实验中的动态应力均匀过程。结果表明:调节并联电阻值可以提高压电计的传感精度;增大压电计的敏感面积可以减小因应力集中所造成的信号失真;材料的热粘塑性性质、摩擦效应等将使信号振荡幅度偏小;多次撞击对信号的加载与卸载段都将产生影响,但当传感器表面未发生明显损伤时,测试的应力平台平均值与真实信号近似相同。     

微波消解ICP-AES测定黑番茄中的17种微量元素

采用微波消解法对样品进行处理,以电感耦合等离子体-原子发射光谱法(ICP-AES)测定黑番茄中17种微量元素的含量。方法的回收率在93.0%—105.8%之间,相对标准偏差小于2.608%。实验证明,黑番茄含有丰富的对人体有益微量元素,是一种健康食品。