油罐汽车卫星定位及电子铅封监管系统

介绍了油罐汽车卫星定位及电子铅封系统的构成、工作原理和功能特点,以及初步的实际运行情况。该系统利用先进的全球卫星定位技术可实时跟踪油罐汽车位置.利用电子铅封实时监测罐车进、出油口的状态,能加强对油罐汽车的管理及提高油罐汽车的调度指挥效率,堵住了私自卸油和利用车辆跑私活的现象。     

添加剂及其对镍电极的作用机理

本文综述了添加剂对镍电极的活性物质利用率、放电电位、使用寿命和宽温度范围内使用性能的影响及其作用机理。总结归纳了α-Ni(OH)_2的制备与稳定性机理、物理与化学性能、以及α-Ni(OH)_2/γ-NiOOH作为镍电极活性物质的可行性。最后还简述了添加剂的载入方式。     

Interaction of electromagnetic waves with granular agricultural product and insects.

The basic correlation is defined which characterizes an influence of electromagnetic radiation on a system of individual particles of ellipsoidal geometry dispersed into some volume (chaotic arrangement) of another medium. The field intensity inside one isolated particle is determined depending on the parameters of the external (relative to the volume) electromagnetic field. Energy loss in an isolated particle is calculated. The shielding effect of a field in an isolated particle by other surrounding particles is taken into account. The relative dielectric permittivity and the relative loss tangent as a function of grain moisture content are measured. Drying and disinfestation of wheat grain by electromagnetic methods are observed.     

紫外激光辐照非纯7-DHC研究

本文报道用KrF准分子激光和N_2分子激光分别辐照含杂质的7-去氢胆留醇合成维生素D_3的实验研究。维主素D_3的前身P_3的转化率～63％。     

Dependence uniformization: a loop parallelization technique

Data dependence uniformization, a method for overcoming the difficulties in parallelizing a doubly nested loop with irregular dependence constraints is proposed. This approach is based on the concept of vector decomposition. A simple set of basic dependences is developed from which all dependence constraints can be composed. The set of basic dependences is added to every iteration to replace all original dependences so that the dependence constraints become uniform. An efficient synchronization method is presented to obey the uniform dependence constraints in every iteration     

水压爆破拆除钢筋混凝土隐蔽部

水压爆破是一种控制爆破技术，它可在不动用机械设备情况下，用水作为介质，把炸药的爆炸能传递给待拆构筑物，达到破碎的目的。本文介绍采用水压爆破拆除钢筋混凝土工事的设计与实施，爆破取得圆满成功。     

混凝土爆破孔壁动态初始参量的数值模拟

在考虑爆轰波与孔壁相互作用及孔壁的可压缩性等主要因素情况下，根据爆轰理论和流体动力学原理，建立了计算偶合装药点起爆时孔壁动态初始参量的物理模型，给出了计算公式。计算了中等威力炸药（如２＃岩石炸药、乳化炸药和水胶炸药）在混凝土中爆炸时孔壁动态初始参量（如初始冲击波压力、速度等值），得到了自起爆点开始沿炮孔长度方向各参量的变化规律、并得出了一些有意义的结论。     

Diagnosis of involutometric issues in flat rolling of external helical gears through the use of finite-element models

High-volume production of precision external-involute helical gears using flat-rolling is impeded by a number of quality issues. Experimental resolution of these issues is expensive and time consuming. The present study utilizes finite-element models (FEM) to diagnose three of these quality issues and to explore possible solutions. Two- and three-dimensional (2D and 3D) ABAQUS models were developed for a specific gear-manufacturing process and resulting geometries were not satisfactory. Subsequently, 3D DEFORM simulations were developed for the same process. Numerically predicted geometries were benchmarked against actual results obtained through designed experiments. Finite-element modeling and experimental results were correlated and the models were validated. Possible solutions were simulated and analyzed through additional modeling. Results obtained from the initial pass of the 3D models have been promising although progress has been limited by the excessive computational time needed. Frequency of re-meshing, high number of elements due to fine mesh, and changing re-mesh criteria contribute to the computational difficulties.     

乙醇溶液的荧光光谱及其特性的研究

分别从理论和实验上对紫外光激励不同浓度的乙醇溶液所产生的荧光光谱及其特性进行了分析研究。结果表明,在波长为254nm的紫外光激励下,乙醇溶液可以产生较强的荧光,其峰值为395nm,经研究认为该荧光是由乙醇分子中C-OH基团的孤对电子产生的。研究乙醇溶液的荧光光谱及其特性可为其作为有机溶剂对其它物质的荧光光谱进行研究提供参考。     

Comments on "H/sub /spl infin// fuzzy control design for nonlinear singularly perturbed systems with pole placement constraints: an LMI Approach"

In this correspondence, we point out some lethal errors in the proof of the theorems given in the aforementioned paper.