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A self-adaptive parallel encryption algorithm based on discrete 2D-Logistic map is developed according to the position scrambling and diffusion of multi-direction in variable space of spatial chaos. The binary sequences b1b2b3···bn are obtained according to the user key, in which the binary sequence 0 and 1 denote distribution mode of processors and the number of binary sequence n denotes cycle number. Then the pseudorandom 2D matrix is generated by 2D-Logistic map, and adaptive segmentation is applied in image matrix and pseudorandom matrix according to the value and the number of binary sequence. The parallel operation is used among blocks to improve efficiency and meet real-time demand in transmission processes. However, the pixel permutation is applied in partitioned matrix through ergodic matrix generated by pseudo-random matrix-block to decrease the correlation of adjacent pixels. Then the pixel substitution is used for fully diffusing through cipher block chaining mode until n cycles. The proposed algorithm can meet the three requirements of parallel operation in image encryption and the real-time requirement in transmission processes. The security is proved by theoretical analysis and simulation results.
In this paper we review the human
resources management outsourcing research in domestic and overseas, establish a
model and then propose research hypotheses. With the empirical research method,
we take the questionnaire investigation and research on enterprise human
resources department manager or staff, and then take statistical analysis to them
with SPSS software. From the research results, we come to a conclusion that top
intervention, strategic position of the function and the asset specificity has more
significant impact to enterprise human resources management outsourcing degree,
reference opinions for enterprise human resources outsourcing.
Based on the theory of corporate image
and perceived quality, we researched influence of consumers corporate image
cognition on consumers perceived quality and purchase intention. We take the telecoms
operator as practical example to do questionnaire survey and analyze the data
with SPSS16.0 and structural equation model; the research results show that
consumers’ corporate image cognition directly and prominently affects perceived
quality instead of consumer purchase intention; It also shows that in china
marketing environment, the social image of corporate image has the greatest effect on consumer
perceived quality, followed by staff image and marketing image.