冲击波测量法检验含铝非理想炸药的能量释放（英）

将有机玻璃紧贴于炸药柱,当爆轰波铅药柱传播至界面时发即在有机玻璃中引起一个强烈的冲击波。利用一特定装置分别测定在ＮＨ４ＮＯ３／ＴＮＴ８０／２０,ＮＨ４ＮＯ３／ＴＮＴ／Ａｌ８０／１０／１０,ＮＨ４ＮＯ３／ＴＮＴ／Ｌｉ８０／１０／１０和ＮＨ４ＮＯ３／Ａｌ９０／１０等炸药爆轰作用下有机玻璃中冲击波的传播速度,以检验含铝非理想炸药的能量释放。结果表明,冲击波速度随着传播距离的增加而降低;铝粉颗粒越细,冲击     

Bifunctional N-Oxides of Alkyldiamidoamines

A homologous series of new surface-active 1,1-bis{[3-(N,N-dimethylamino)ethyl]-amido}alkane-di-N-oxides were synthesized in the reaction of an appropriate diethyl 2-alkylmalonate with N,N-dimethylethylenediamine followed by oxidation with an aqueous solution of hydrogen peroxide. The adsorption isotherms of their aqueous solutions were measured and evaluated to obtain adsorption parameters: critical micelle concentration (CMC), surface excess concentration (Γ_CMC), equilibrium surface tension at the CMC (γ _CMC), cross-sectional area of the adsorbed surfactant molecule (A _CMC), standard free energies of adsorption and micellization

Germicidal Properties of Ozonated Sunflower Oil

The aim of this work was to establish the minimal inhibition concentration (MIC) of ozonated sunflower oil for various microorganisms. To determine the influence of the ozonated medium on the growth of bacteria Bacillus subtilis, Escherichia coli and yeast Candida albicans the Petri dish method was used. Chemical and physical properties of ozonated sunflower oil were additionally studied. Microbiological studies proved that these microbes have various sensibility against ozonated oil. The most resistant are gram-negative bacteria E. coli and the yeast C. albicans. Gram-positive bacteria, B. subtilis turned out to be less resistant, because no growth was observed for preparation with an ozone dose of 200 mgO₃/g oil.     

Radar-echo tracking by use of invariant moments

A number of techniques to track rainfall patterns by use of radar observations have been developed over the years. We present a method for radar-echo tracking based on Hu invariant moments. The method has been tried on several sequences of test images, and the derived displacement fields were in good agreement with the real motions of the tested objects. For the real data obtained from the conventional meteorological radar in Legionowo the method occasionally failed when changes in the radar echo between observations were too large.     

The Peculiarities of Magnetic Flux Dynamics at Magnetothermal Instability in Textured Bi2Sr2CaCu2O8+δ

The magnetic flux dynamics was investigated in a textured Bi₂Sr₂CaCu₂O₈₊ sample using a miniature Hall probe placed on the surface of the superconductor. The process of magnetic flux penetration into the superconductor was found to have a complex structure and consist of two processes with different time scales. The first one has a length of tens of microseconds and is considered as locally adiabatic. The second one has a length comparable with the time of thermal diffusion. The importance of the above two processes in the development of magnetic instability is analyzed.     

Kinetics of lithium evaporation from solid solutions of Li2O in NiO

Measurements of the kinetics of evaporation of Li₂O from polycrystalline solid solutions of Li₂O in NiO have been performed under varying temperatures (1340 to 1665 K) and solution concentrations (0.25 to 19.5 at.% Li). By taking into account the changes in specific surface area during annealing of the preparations, an equation has been derived describing the kinetics of the evaporation process.     

Lateral observation of transparent non-homogeneous axisymmetrical media

Observations of transparent non-homogeneous media by means of various optical apparata are classified according to the form of mathematical equations encountered. Four classes of experiments (four kinds of probes) are distinguished and arranged in such an order that the lateral-observation data function of each following probe is the derivative of the previous one. For the case of axisymmetrical objects, integral equations are presented which connect the data function of each probe with the radial profile under examination. It suffices, however, to compute the integral equation for only one probe. Indirect solutions of all the other equations are obtained taking into account the a/m relation between data functions of successive probes. Numerical methods based on 1) interpolation over data points, and 2) polynomial approximation of the data function over a whole region of integration, are considered. The techniques described are tested by reconstruction of a Gaussian-type profile.     

Stability and excitation of potassium promoter in iron catalysts – the role of KFeO2 and KAlO2 phases

The kinetics of the NO SCR with propane has been studied on a low‐exchanged Cu‐ZSM‐5 catalyst. The study of the kinetics of individual reaction stages (2‐nitrosopropane isomerization to acetone oxime and reaction of adsorbed acetone oxime with gaseous NO) has shown that the NO reaction with acetone oxime is the rate‐determining stage in the whole chain of transformations leading to the formation of molecular nitrogen in the low‐temperature region below 300 °C. The kinetic analysis of the reaction has revealed that at the temperatures above 300 °C propane plays a more important role. This revised version was published online in July 2006 with corrections to the Cover Date.     

Continuous and discrete models of neural systems in infinite-dimensional abstract spaces

Infinite countable or uncountable systems of nonlinear ordinary and partial differential equations, which are discrete and continuous models, respectively, of real-world phenomena and processes were analysed in physics, biology, neuroscience, in studying of neural systems or in pure mathematics. Discrete models and corresponding infinite countable systems have been investigated by numerous authors in Banach sequence spaces ?^∞. But continuous model and corresponding infinite uncountable systems have been investigated by a few authors only.It is interesting that we can attack the above problems by using the same topological fixed-point theory tools as in the countable case.It is the study of infinite uncountable systems of parabolic reaction-diffusion-convection equations that is the subject matter of this paper. Motivation for considering such systems and examples thereof are presented. The paper is an introduction to the study of infinite uncountable systems of parabolic equations.     

Integrated outburst detector sensor-model tests

Outbursts of methane and rocks are, similarly to rock bursts, the biggest hazards in deep mines and are equally difficult to predict. The violent process of the outburst itself, along with the scale and range of hazards following the rapid discharge of gas and rocks, requires solutions which would enable quick and unambiguous detection of the hazard, immediate power supply cut-off and evacuation of personnel from potentially hazardous areas. For this purpose, an integrated outburst detector was developed. Assumed functions of the sensor which was equipped with three measuring and detection elements: a chamber for constant measurement of methane concentration, pressure sensor and microphone. Tests of the sensor model were carried out to estimate the parameters which characterize the dynamic properties of the sensor. Given the impossibility of carrying out the full scale experimental outburst, the sensor was tested during the methane and coal dust explosions in the testing gallery at KD Barbara. The obtained results proved that the applied solutions have been appropriate.