This paper introduces the operating principle of RC4 stream cipher algorithm,which to be a kind of cipher technology,and its two mode application in Lotus Domino/Notes encryption system,analysis the characters and advantages of amalgamating RC4 algorithm with Lotus Domino/Notes encryption system,discusses main factors need to consider while encryption algorithms to be selected in software development in order to provide reference for constructing safe information system.

介绍了密码技术中RC4流密码加密算法的工作原理及其在Lotus Dom ino/Notes中两种模式下的应用过程,分析了RC4算法与Lotus Dom ino/Notes加密系统融合的特点与优势,探讨了软件开发过程中选择加密算法时所需考虑的主要因素,以期为构造安全的信息系统提供参考.

The single mode and two mode overmodulation technologies are applied to three-level SVPWM respectively,whereby enlarging the modulation scope 0≤MI(≤1).

The results showed that the degree of entanglement between two mode vacuum fields is influenced by the values of velocity of the atomic motion and the structure of the field-mode,but the periodic evolution of the entanglement properties cannot be destroyed.

With a simplified delay time distribution function in the kinetic equations of a binode system, the neutron evolution is found to follow a two mode exponential decay.

Two mode solvers based on the finite element and the mode matching methods are compared by way of analyzing rib waveguides.

It is shown that two mode coded channels can be separated using optical directional couplers with enhanced mode selectivity combined with a simple signal processing unit.

Transmission of two mode coded channels in one fibre using optical directional couplers as mode selective elements

In this paper we study the character of the Wigner function and Husimi function of the one- and two mode combining squeezed state (OTCSS) on the basis of plotting the three dimensional graphics of the Wigner function and Husimi function.

Utilizing two of the three lowest degenerate H-modes in a waveguide of equilateral triangular cross-section, we construct a filter of single cavity excited in two modes. We carry through the theoretical analysis and the experimental verification.

In many regions, the superficial layer consists of low velocity, unconsolidated sediments overlying more competent beds with higher velocities. When the unconsolidated layer is sufficiently thin, say, less than a wave length, the layer may be regarded as a loaded membrane which possesses only inertia, but offers no elastic reaction. Different phases of seismic waves are generated by an internal point source in an elastic halfspace covered with an unconsolidated superficial layer and their effects on the reflection...

In many regions, the superficial layer consists of low velocity, unconsolidated sediments overlying more competent beds with higher velocities. When the unconsolidated layer is sufficiently thin, say, less than a wave length, the layer may be regarded as a loaded membrane which possesses only inertia, but offers no elastic reaction. Different phases of seismic waves are generated by an internal point source in an elastic halfspace covered with an unconsolidated superficial layer and their effects on the reflection of seismic waves are discussed. The results show that (1) there are two modes of Rayleigh waves whose dispersions are controlled primarily by the thickness of the superficial layer and the shear velocity in the elastic substratum. Besides the ordinary body waves and surface waves, other types of waves with the amplitude factors varying inversely as the square of epicentral distance are also evaluated; (2) when a ptane wave is incident from the underlying elastic half-space, the reflection coefficient depends not only on the incident angle, but also on the frequency. It is in general a complex quantity.

Based on the known histological and electrophysiological data concerning the receptive fields of the vertebrate retina, a mathematical model was proposed. This model consists of three layers of net-works in which net-work elements R of the first layer represent receptors, elements I of the second layer represent connective cells (including bipolar, horizontal and amarcrine cells) and elements G of the third layer represent ganglion cells. Suppose that I and G possess operating properties of spatial summation...

Based on the known histological and electrophysiological data concerning the receptive fields of the vertebrate retina, a mathematical model was proposed. This model consists of three layers of net-works in which net-work elements R of the first layer represent receptors, elements I of the second layer represent connective cells (including bipolar, horizontal and amarcrine cells) and elements G of the third layer represent ganglion cells. Suppose that I and G possess operating properties of spatial summation and of threshold and the connections between the elements of two neighbouring layers have two modes, one excitating (signed by 1) and the other inhibiting (signed by-1), then the one-dimensional discrete model is expressed as follows:g=[W·[K·AR]_α]_β(1)where g is the output of a ganglion cell,A=(α_1 α_2…α_n)is a vector which represents the light spot input,K=(K_11 K_12 K_13 …K_(1n) K_(21) K_(22) K_(23) …K_(2n) ……K_(m1) K_(m2) K_(m3) …K_(mn)) is the connection matrix between the first and the second layers,W=(w_1,w_2,w_3,…w_m)is the connection matrix between the second layer and the ganglion cell, α and β represent the thresholds of cells belonging to the second layer and ganglion cells respectively and R describes the characteristics of the receptors.Equation (1) can also be written as follows:In some aspects, this model conforms qualitatively with electrophysiological data on receptive fields conducted with small spot lights, i. e.(1) When various values of K were taken, this model qualitatively shows correspondingly the properties of on-center RF, off-center RF and on-off RF.(2) So far as on-RF and off-RF are concerned, this model has three different response regions and shows the antagonistic effect among different regions.(3) For any receptive field, this model presents the property that within the receptive field the excitation level varies with different regions. The model also possesses perfect summation region, partial summation region and inhibition region.Methods are also suggested for the construction of some models having special spatial properties.The model was further extended to a two-dimensional, continuous form:(3) where k (x, y, ξ, η)is a weighting function. When k is taken as a kind of spatial invariant linear system then (3) can be written as (4)The significance of the system in information processing of the visual system is also discussed.