Advanced Materials Research Vol. 460

Abstract: Using two conventional aromatic rice cultivars and one hybrid aromatic rice combination, effects on the quality of aromatic rice were studied by spraying zinc and other multiple nutrient elements under the field experiment.The results showed that by spraying Zn, ZnMg，ZnMgK and ZnMgKFeCu MoCoB on heading stage and followed on the 7th and 14th day after the heading stage, the rate of brown rice, milled rice and head rice, the score of aroma and eating and the content of protein were improved, the chalky rice rate, chalkiness and amylose content were reduced and at the same time the length of rice gel was elongated, therefore the processing quality, appearance quality, cooking and eating quality and nutrient quality of aromatic rice were improved to some extent. The highest quality of aromatic rice was achieved by spraying the combination of Zn and all the other multiple nutrient elements, followed by spraying ZnMgK, ZnMg and Zn solely.

Abstract: The effect of three organic additives in stannous methanesulfonate baths on cathodic overpotential and Faradaic impedance of tin-electrodeposition were studied by measuring cathodic polarization curves, galvanostatic responses and electrochemical impedance spectroscopy. The results show that the composite additive consisting of three organic compounds can significantly increase the cathodic polarization, crystallization overpotential and charge transfer resistance, which is very beneficial to improve coating quality and result in a fine-grained and smooth matt tin coating.

Abstract: The methansulfonate acid electrolyte is a new type of plating baths which has some advantages such as friendly to environment, stability and outstanding electrical conductivity. In this work, the effect of three organic additives (nonionic surfactant Triton X-100, a weak organic acid (additive A) and an organic sodium salt (additive B)) in stannous methanesulfonate baths on tin electrodeposits were studied by SEM and XRD. The results show that the Triton X-100 plays an important role in improving the coating qualities and promoting the densification of crystalline structure. Under the synergetic action of additive A and additive B in the presence of Triton X-100 a smooth, fine-grained matt tin coating which has certain preferred orientations of lattice plane, could be obtained on copper substrate.

Abstract: The aim of this paper is to sorting the phased array radar signal and recognizing the states of PAR. The method is using the beam-scanning characters of the PAR, and then proposes an algorithm based on the rough sets theory to sort the signal of phased array radars. From researching on the characters of the phased array radar’s beam scanning manners, we can use the PDW received from the receiving equipments as a set of attributes. After sorting the signal of PAR, we use the method of FRFT to pick up the same characters in the sorted PAR pulse train. So we can recognize the states of PAR through this method. The experiments showed that this method can get a good result.

Abstract: In digital signal analysis, the signal needs to be pretreated first. Because there are many uncertain factors affecting the signal in the engineering projects and the signal analysis methods are different too, the signal can be characterized through pretreatment so that the processing methods will be selected accordingly. This belongs to signal processing qualitative part. On the other hand, through pretreatment the abnormal signals caused by the machines or people error can be removed. This belongs to signal processing quantitative part. After the pretreatment of the track long-wave irregularity testing data in the maglev railway, the signal is determined as non-stationary stochastic data. According to property of the data, modern signal time-frequency analysis method was applied in this article for further study.

Abstract: The H- infinity stability of Lurie switched systems is investigated. All the subsystems are Lurie systems. Lyapunov functions is used to derive the sufficient conditions for H- infinity stability of systems .

Abstract: The paper introduces a kind of detection method of face pose based on stereoscopic vision technology, approximately divides head’s deflexion into three plane rotations. By calculating the deflexion angle of three directions, you can determine the face’s pose. This method obtains face images by the left and right video channels, first analyses the similarity of double channels’ images to obtain three-dimensional information of face features’ key points. Then calculates three deflexion angles according to these information, therefore can correspondingly adjust and deform the original image to get standard frontal face image, and provides correction image for the latter face recognition. By this method the impact of pose change to face recognition can be reduced obviously in the earlier stage, so the system’s overall recognition accuracy rate is enhanced effectively.

Abstract: This paper introduces arithmetic to calculate correlation of two long sequences by using fast correlation method, and the design method of the FFT coefficient table using DSPLIB library function. Using this method, the author accomplished the linear correlation operation of two 1024-dot real sequences on the platform of TMS320C54x DSP. Compared with direct correlation, this method is easier, rapider and more practical

Abstract: The latest development on preparation of mullite, mullite-corundum and mullite-zirconia materials using fly ash by reaction sintering process was reviewed. The future development of mullite and its composites synthesized from fly ash was prospected.