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Uncoupling proteins (UCPs) belong to the family of mitochondrial transporter proteins and mediate regulated proton leak across the inner mitochondrial membrane. The UCPs play an important role in energy homeostasis and reactive oxygen species (ROS) release, and have been established as candidate genes for obesity, diabetes and hypertension. This study examined the possible association between the single nucleotide polymorphisms (SNPs) of UCP1–3 genes and essential hypertension (EH) in a northeastern Han Chinese population. A total of 2207 Chinese Han subjects were enrolled, including 1045 normotensives and 1162 hypertensives. Genotyping of UCP1 rs1800592, UCP1 rs12502572, UCP2 rs659366, UCP2 rs660339, and UCP3 rs3781907 was detected using Sequenom MassArray System. SHEsis was used to analyze linkage disequilibrium and haplotype. No evident association was observed between the genotype distributions and allele frequencies of individual SNPs and EH. Haplotype analysis showed the haplotype GAATA (rs1800592-rs12502572-rs659366-rs660339-rs3781907) was significantly associated with lower EH risk (p= 0.001, χ2= 10.861, OR = 0.634, 95% CI = 0.483–0.833), and AGATG was associated with increased EH risk (p= 0.012, χ2= 6.287, OR = 1.265, 95% CI = 1.052–1.521). These findings suggest haplotypes of UCP1–3 genes are linked to EH risk in a northeastern Han Chinese population. Further investigation with larger sample size in multiethnic population is needed to confirm our results.

A robot based on STC12C5A60S2 single-chip-microcomputer is designed for improving the production efficiency and reducing repetitive work. The system could identify path by detecting metal using eddy current sensor. By ways of the single-chip-microcomputer controlling stepper motor, the robot can run according to the predetermined route, judge independently cargo range and deliver the goods to the designated location. The implementation methods of the important links, such as mechanical structure design, path recognition and steering engine driving and so on are introduced, the system of which make the information interaction with computer through ISP-module (In-system-programming).by testing the model, it shows that the system can meet the design goals of handling goods automatically, and it has higher application value of reducing the accident rate of worker in repeated works and improving labor productivity.

In recent years, the strategic significance of the oceans is growing as well as its research and development needs. The underwater wireless communication is becoming more and more important. The underwater acoustic communication is one of the few mediums which can conduct the underwater transmission over a long distance, and the multipath effect is the major obstacle of affecting the systems high speed and high reliability. The characteristics of underwater acoustic fading and coherent multi-path channel are studied, and the model of underwater acoustic spreading spectrum (SS) communication system is established. The affect of coding technique on the systems performance are analyzed in detail. The improved RAKE receiving technical solution is put forward, whose simulation analysis and data in different combining ways are given. It is proved that the scheme can better solve the problem of multipath interference in underwater acoustic transmission.

The direct digital frequency synthesizing technology is one of the main area for frequency synthesizing technology. This paper proposed an output shift keying (OSK) digital circuit design for a 14-bit 2.5GSPS RF-DDS, which can support two modes: manual OSK and automatic OSK. Simulation verification and test results both show the OSK circuit design can support amplitude modulation.

The use of reliability simulation method of repairable systems under maintenance after failure (RSS) will not be limited by the life distribution of the systems elements. Less computation is needed with this method, the computation time is short, but results are precise and determinate. The RSS method offsets the problems in the reliability simulation with the Markov and Monte-Carlo method and has practical merits in reliability engineering. In this paper, reliability assessments are applied in FYXF-03 dynamotor prime mover simulation system by using Weibull model. A useful reference is provided for making plans for equipment repair and maintenance as well as the selection of components.

This article base on FPGA and full HD video conversion chip AD9889B, designed and implemented an HDMI image acquisition and display module suitable for industrial cameras. FPGA configure the AD9889B chip through IIC way, the parallel original HD digital video signals inputted from image acquisition front-end of industrial cameras is encoded into the desired video format with AD9889B. Finally realizes the HD digital video is outputted through HDMI interface.

Hydraulic control one-way valve as the retaining element of vertical hydraulic cylinder, often is due to improper application to produce large opening pressure, not unlocking, vibration, noise etc.fault. This paper analyses two vertical hydraulic balance circuit, one makes use of the one-way throttle valve and another is not,calculates the necessary condition and opening pressure of hydraulic control one-way valve reverse opening, obtains the opening characteristic of hydraulic control one-way valve in vertical balancing circuit, acquires the relationship of the reverse opening pressure with hydraulic cylinder balance pressure, hydraulic cylinder speed ratio, hydraulic control one-way valve structural parameters. Lastly, how to correctly use the hydraulic control one-way valve is discussed in the vertical hydraulic cylinder balanced circuit.

In this paper, based on the FPGA and with a video dedicated A / D converter chip, LVDS coding chip, the design and implementation of a SD(standard-definition) analog video signals to HD(high-definition) digital video signal converter. First, input SD analog video into digital video signals meet the ITU-BT656 standard. Then use the FPGA with the video processing chip and DDR do some corresponding processing to achieve high-definition digital video output. After the actual test, the converter output signal of the image quality is well, meets the design requirements, and to verify the effectiveness of the program.

Founded two input PSS model,by making analysis the theory of Synchro- generator. Use New PSS model to be as a accessorial controlling of Excitation system of Synchro-generator. Founded and simulated the Excitation system including this New PSS in the transient condition based on MATLAB/SIMULINK. Compared the result of simulation, it indicated that the excitation system accessorial controlled by this PSS has nicer roubustness, increased Damp trait of the system,restraining the interference, low frequency oscillation and recover of short cut than the excitation system controlled by PID meth.

Abstract: The spatial and temproal evolution of strain, fault displacement and acoustic emissions during deformation of fault systems with different geometrical textures are studied experimentally under biaxial compresison, and the characteristics of typical instability events are analysed. The results show that fault systems with different geometrical textures have different evolutional images of physical field during deformation. Based on the characteristics of physical field and the deformation mechanism, various types of instability — two types of stick-slip, fracturing type and mixed type instability can be recognized. Different types of instability differ clearly in their precursors, and the instability type is closely related with the geometrical texture and the deformation stage of the fault system. Therefore, it is very significant for earthquake prediction and precursor analysis to investigate the geometrical textures of natural active faults.