Numerous engineering applications require lightweight structures with excellent absorption capacity. The problem of obtaining such may be solved by nature and especially biological properties. paper concerns an attempt to develop a new energy-absorbing material using biomimetic approach. structure investigated here is mimicking geometry diatom shells, which are known optimized in terms the resi...

The electromagnetic and radio-absorbing characteristics offerrite-polymer composites with conductive inclusions based on polyvinylalcohol are investigated. Ni-Zn spinel ferrite powder of 2000NN gradewith composition Ni 0.32 Zn 0.68 Fe 2 O 4 was used as filler. It is shown that theobtained effective absorbers in the frequency range 2-5 GHz peak reflection loss less than ~20 dB. Through analysis ...

In order to reduce the heat transfer between indoor and outdoor environments influence of ambient temperature fluctuation on environment, adding micro-PCM building envelope is one effective means. Micro-PCM can ?intelligently? control by absorbing or releasing during phase change maintain stability. this paper, temperature-adjustable mortar was prepared using with a 25?C, painted surface cement...

This article brings out the improved thought of college admission system reform based on parallel will: College Admission Mode of Multiple Choices Based on Internet,CAMMCBI。We use the absorbing Markov analysis method to establish the student scores and college level sequence model of absorbing Markov chain, analysis CAMMC BI admission mechanism problem from the angle of dynamic. Reform of Colle...

We present a theoretical study on how dynamic radiation force of acoustic waves actuates on absorbing spheres. We consider the radiation force is generated by the difference-frequency component of a bichromatic plane wave in a lossless fluid. We analyze the spectrum of the dynamic radiation force for polymethymethacrylate (lucite) and polyethylene spheres. Results reveal that absorption cause t...