An Adaptive Method of Image CompressionBased on Wavelet Analysis

1. INTroDUCTIONIn recellt years, the research on image compression and coding using wavelet transform has become a very hottOPic. It is because wavelet analysis has freedom retractility in the field of frequency. When the band of signal' is narrowl we can zoom in the resolution in order to express the signal exactly. If the band is wide, we can zoomOat the resolutinn to create the need of signal processing. Therefore.the method of wavelet analysis has a strongadaptability, and it isn't l…     

Polystyrene Based SPR Biosensor Chip for Use in Immunoassay

ＩｎｔｒｏｄｕｃｔｉｏｎＩｍｍｕｏｓｅｎｓｏｒｓａｒｅｓｏｍｅｏｆｔｈｅｍｏｓｔｐｒｏｍｉｓｉｎｇｂｉｏｓｅｎｓｏｒｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｅｆｆｅｃｔｉｖｅｎｅｓｓａｎｄｓｅｎｓｉｔｉｖｉｔｙ[1] .Ｉｍｍｕｎｏａｓｓａｙｓａｒｅｕｓｅｄｔｏｍｅａｓｕｒｅｔｈｅｉｎｔｅｒａｃｔｉｏｎｏｆａｎｔｉｇｅｎｓａｎｄａｎｔｉｂｏｄｉｅｓａｓ ｐａｒｔｏｆｉｍｐｏｒｔａｎｔｒｅｓｅａｒｃｈｏｎｔｈｅｐｈｙｓｉｏｌｏｇｙｏｆａｎｏｒｇａｎｉｓｍａｎｔｉｉｎｆｅｃｔｉｖｉｔｙ ,ｉｎｆｏｒｍａｔｉｏｎｔｒａ…     

谈英语情态助动词和情态动词在工程招投标文件中的作用

招投标文件是一种非常严肃的书面文体，语言的运用除要求严谨周密、准确清晰外，招投标方的口气和意向也十分重要。通过举例，对比，阐述了英语情态助动词和情态动词在工程凤标文件中的作用。     

IMPULSIVE BOUNDARY VALUE PROBLEMS FOR STURM-LIOUVILLE TYPE DIFFERENTIAL INCLUSIONS

In this paper, the authors investigate the existence of solutions of impulsive boundary value problems for Sturm-Liouville type differential inclusions which admit non-convex-valued multifunctions on right hand side. Two results under weaker conditions are presented. The methods rely on a fixed point theorem for contraction multi-valued maps due to Covitz and Nadler and Schaefer＇s fixed point theorem combined with lower semi-continuous multi-valued operators with decomposable values.     

Identification and characterization of microsatellite markers for yellow grouper Epinephelus awoara and bluelined hind Cephalopholis formosa

0Introduction Groupershaveconsistentlyprovedhighlyvulnerable toanythingotherthanhighlevelsoffishingpressure.This islargelyduetotheirbiologicalcharacteristics.Yellow grouperEpinephelusawoaracanbeseeninHongKong livefishmarket[1].Manygrouperspeciesoncerecorded as“common”inHongKongarenowrarelyseen[2].Blue linedhindCephalopholisformosaisoftenmisidentifiedin thepetfishliteratureandsoldasC.boenakfromIndo westPacific.Cephalopholisispartofasub family(Epinephelinae)andfurthersub division(Tribe E…     

Composition demixing effect on cathodic arc ion plating

The composition demixing effect has been found often in alloy coatings deposited by cathodic arc ion plating using various alloy cathode targets. The characteristics of composition demixing phenomena were summarized. Beginning with the ionization zone near the surface of the cathode target, a physical model in terms of the ions generated in the ionization zone and their movement in the plating room modified by bias electric field was proposed. Based on the concept of electric charge state, the simulation calculation of the composition demixing effect was carried out. The percentage of atoms of an element in coating and from the alloy target was demonstrated by direct comparison. The influences of the composition change of the alloy target and the bias electric field on the composition demixing effect were discussed in detail. It is also proposed that the average charge states of the elements may be used to calculate the composition demixing effect and to design the composition of the alloy target.     

Liquid structure of pure iron by X-ray diffraction

The liquid structure of pure iron at 1540, 1560 and 1580℃ was studied by X-ray diffraction. The results show that near the melting point there is a medium-range order structure that fades away with the increasing temperature. The average nearest distance of atoms is almost independent of the melts temperature, but the average coordination number, the atom cluster size and the atom number in an atom cluster all decrease with the increasing temperature of the melt. Near the melting point there area lot of atom clusters in the pure iron melt. The atom cluster of pure iron has the body-centered cubic lattices, which are kept from the solid state. And the body-centered cubic lattices connect into network by occupying a same edge. The atoms in the surrounding of the atom clusters are arranged disorderly.     

Effects of boron on the microstructure and thermal properties of Cu/diamond composites prepared by pressure infiltration

Diamond reinforced copper (Cu/diamond) composites were prepared by pressure infiltration for their application in thermal management where both high thermal conductivity and low coefficient of thermal expansion (CTE) are important. They were characterized by the microstructure and thermal properties as a function of boron content, which is used for matrix-alloying to increase the interfacial bonding between the diamond and copper. The obtained composites show high thermal conductivity (>660 W/(m·K)) and low CET (<7.4×10-6 K-1) due to the formation of the B₁₃C₂ layer at the diamond-copper interface, which greatly strengthens the interfacial bonding. Thermal property measurements indicate that in the Cu-B/diamond composites, the thermal conductivity and the CTE show a different variation trend as a function of boron content, which is attributed to the thickness and distribution of the interfacial carbide layer. The CTE behavior of the present composites can be well described by Kerner’s model, especially for the composites with 0.5wt% B.     

Effect of the formation process of transient liquid phase (TLP) on the interface structure of TiAl joints

TiAl has been joined employing the transient liquid phase (TLP) bonding with Ti combined with Cu, Ni or Fe foils. Experimental results showed that though the interface structures of the joints are quite different, all the joined zones are composed of five sublayers, i.e. two diffusion zones, two interfacial zones and an interlayer. It has been convinced that the formation process of the transient liquid phase controls the diffusion behavior of melting point depressant (MPD) Cu, Ni, and Fe atoms, which leads to form different interface structures of the joints.     

Prostate cancer targeted MRI nanoprobe based on superparamagnetic iron oxide and copolymer of poly（ethylene glycol） and polyethyleneimin

Methoxyl poly （ethylene glycol） （mPEG-OH） was successfully grafted onto branched polyethyleneimine （hy-PEI） to yield a water soluble graft copolymer mPEG-g-PEI. This copolymer may package superparamagnetic iron oxide （SPIO） by ligand exchange. The SPIO weight percentage in the polymer coated nanoparticles was determined to be 55%, the size and zeta potential of nanoparticles was 50 nm and 12 mV respectively. Antibody fixation onto the complex （mPEI-g-PEG-SPIO） surface layer was achieved by activated single chain monoclonal antibody against prostate stem cell antigen （PSCA）. Our study showed that the single chain antibody functionalized nanoprobe （scAbpscA-PEI-g-PEG-SPIO） with a small size can specifically enter the prostate cancer cells, decreasing MRI T2-weighted signal intensity of prostate cancer cells to 44.76%, Our results revealed that the potential of this magnetic nanoparticulate system promised as a novel MRI nanoprobe for early diagnosis of prostate cancer （PCa）.