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Now showing items 17 - 32 of 1558

  • Complete Genome Sequencing of Dengue Virus Type I from Zhuhai City, China

    Chen, Chao   Wei, Quande  

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  • METHOD FOR USE IN RED SPOT GROUPER FRY BREEDING

    The present invention relates to the technology of sea fish fry breeding. A method for use in red spot grouper fry breading, the breeding method comprising the steps of: 1) selecting broodstock, 2) artificial spawning, 3) distributing eggs, 4) regulating water quality, 5) changing water, and 6) feeding. The foregoing technical solution, on the basis of imitating a wild ecological environment, makes appropriate adjustments to certain physical and chemical factors to adapt to the growth and development of the fry, thereby achieving large-scale breeding of red spot grouper fry.
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  • FULLY-INTEGRATED ANTI-BLOCKING RADIO FREQUENCY RECEIVING FRONT-END ARCHITECTURE

    Disclosed is a fully-integrated anti-blocking radio frequency receiving front-end architecture, comprising a blocking signal filtering stage and a down mixing stage. The blocking signal filtering stage is a feed-forward structure, and a main branch and a feed-forward branch use low-noise amplifiers with same circuit structures to realize matching. In addition, the feed-forward branch uses the impedance moving feature of a passive mixer in the frequency domain, a band elimination filter is generated at a radio frequency local oscillator to filter useful signals, and then a useful radio frequency signal is obtained by subtracting an obtained blocking signal from a blocking signal of the main branch. Because the blocking signal is directly filtered out after two low-noise amplifiers, influence on another circuit is avoided, and other non-ideal factors are avoided. Down mixing is realized to obtain a useful middle-frequency signal by connecting the passive mixer.
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  • New range domain carrier-smoothed code filtering with dual-frequency BDS data

    Chen, Chao   Chang, Guobin   Zhang, Shubi   Chen, Guoliang   Luo, Fei  

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  • Multi-resonance peaks fiber Bragg gratings based on largely-chirped structure

    Chen, Chao   Zhang, Xuan-Yu   Wei, Wei-Hua   Chen, Yong-Yi   Qin, Li   Ning, Yong-Qiang   Yu, Yong-Sen  

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  • Path generation algorithm for UML graphic modeling of aerospace test software

    Qu, MingCheng   Wu, XiangHu   Tao, YongChao   Chen, Chao  

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  • Nonbinary LDPC Codes on Cages: Structural Property and Code Optimization

    Chen, Chao   Bai, Baoming   Shi, Guangming   Wang, Xiaotian   Jiao, Xiaopeng  

    A (v, g)-cage is a (not necessarily unique) smallest v-regular graph of girth g. On such a graph, a nonbinary (2, v)-regular low-density parity-check (LDPC) code can be defined such that the Tanner graph has girth 2g and the code length achieves the minimum possible. In this paper, we focus on two aspects of this class of codes, structural property and code optimization. We find that, in addition to those found previously, many cages can be used to construct structured LDPC codes. We show that all cages with even girth can be structured as protograph-based codes, many of which have block-circulant Tanner graphs. We also find that four cages with odd girth can be structured as protograph-based codes with block-circulant Tanner graphs. For code optimization, we develop an ontology-based approach. All possible inter-connected cycle patterns that lead to low symbol-weight codewords are identified to put together the ontology. By doing so, it becomes handleable to estimate and optimize distance spectrum of equivalent binary image codes. We further analyze some known codes from the Consultative Committee for Space Data Systems recommendation and design several new codes. Numerical results show that these codes have reasonably good minimum bit distance and perform well under iterative decoding.
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  • System-level simulation of microbolometer and read-out integrated circuit

    Chen, Chao   Jiang, YaDong   Zhang, Long   Zhou, Yun   Zheng, Xing  

    A method for system-level simulation between microbolometer designing and Read-Out Integrated Circuit (ROIC) was studied. Three-dimensional (3D) structure modeling of the microbolometer was built. Thermal capacity, thermal conductivity and resistance of the model were obtained from thermoelectric coupling Finite Element Method (FEM) based on the model. An electrical equipment circuit of microbolometer which contains these three parameters was established. By using Verilog-AMS language, the electrical equipment circuit was described as a reduced-order macro-model. Then, the reduced-order macromodel was compiled in cadence to form IP unit of microbolometer, which could be used and identified in cadence. Systemlevel simulation between microbolometer and ROIC was accomplished. Key performances of the device, including input and output characteristics, were obtained in simulation and verified by experimental results.
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  • Constant Weight Codes From Constant Dimension Codes and Their Applications

    Chen, Chao   Wang, Xiaotian   Bai, Baoming   Shi, Guangming  

    This paper presents a geometric approach to the construction of constant weight codes from constant dimension codes. Two classes of constant weight codes are constructed based on the incidence structures in projective and Euclidean geometries, respectively. It is shown that some known optimal codes can be re-obtained in this way. As an application, the constructed codes are used in store-and-forward networks for packet loss recovery. Their decoding is translated into that of the corresponding constant dimension codes. The decoding capability is beyond that of the bounded-distance decoding. Remarkably, for constant weight codes from Koetter-Kschischang codes, the minimum-distance decoding is achieved.
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  • METHOD FOR IDENTIFYING A SUITABLE PARKING SPACE, MOTOR VEHICLE, AND SERVER

    Disclosed is a method for identifying a suitable parking space (7-16) for a motor vehicle (1) and a route leading thereto, wherein at least one collision-free route is calculated on the basis of at least one piece of information which is related to a search for a parking space and which is queried by at least one external server (4), which manages at least one parking lot (6) having at least one parking space (7-16), before the motor vehicle reaches the parking lot (6).
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  • Direct and reversed dorsal digital island flaps: A review of 65 cases

    Chen, Chao   Tang, Peifu   Zhao, Gang  

    Background: Reconstruction of soft tissue defects in fingers continues to be a challenging problem. The purpose of this study is to report the reconstruction of small-to-moderate defects of fingers with dorsal digital island flap (DDIF) and to evaluate the efficacy of use of the flap. Methods: Over last six years, a retrospective study was conducted with 65 patients who had soft tissue defects of fingers treated with the DDIF. Sixty-nine soft-tissue defects were found in 69 fingers in 65 patients. Based on the flow direction of blood supply, the patients were divided into two groups: the direct (n = 35) and reversed (n = 30) DDIF groups. In addition, based on the different donor sites, the direct DDIF group was divided into two subgroups: the proximal phalangeal direct DDIF subgroup (n = 16) and the extended pedicle direct DDIF subgroup (n = 19). The main outcomes were static 2-point discrimination and Semmes-Weinstein monofilament scores of flap and joint motion. Results: At the final follow-up, the mean static two-point discrimination of the flaps was 9.7 mm (range, 8 to 12 mm) in the proximal phalangeal direct DDIF subgroup and 8.3 mm (range, 7 to 11 mm) in the extended pedicle direct DDIF subgroup, with a significant difference (p = 0.005). In the direct DDIF group, there was no significant difference in total active motion between the donor fingers and the opposite sides. In the reversed DDIF group, the mean total active motion of the donor fingers was 1708 and the data of the opposite sides was 1818, with a significant difference (p = 0.024). Maximum amplitude losses of 158 were seen in 12% of patients in the distal interphalangeal joint. Conclusions: The DDIF is reliable and technically easy for reconstructing small-to-moderate defects of fingers. The extended pedicle direct DDIF may be an optional solution when sensory reconstruction is needed. (C) 2014 Elsevier Ltd. All rights reserved.
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  • Cross-linked Chitosan as an Efficient Binder for Si Anode of Li-ion Batteries

    Chen, Chao   Lee, Sang Ha   Cho, Misuk S.   Kim, Jaehoon   Lee, Youngkwan  

    We investigate the use of chitosan (CS) as a new cross-linkable and water-soluble binder for the Si anode of Li-ion batteries. In contrast to the traditional binder utilizing a hydrogen bond and/or van der Waals force-linked anode electrodes, CS can easily form a 3D network to limit the movement of Si particles through the cross-linking between the amino groups of CS and the dialdehyde of glutaraldehyde (GA). Chemical, mechanical, and morphological analyses are conducted by Fourier transform infrared spectroscopy, tensile testing, and scanning electron microscopy. The cross-linked Si/CS-GA anode exhibits an initial discharge capacity of 2782 mAh g–1 with a high initial Coulombic efficiency of 89% and maintained a capacity of 1969 mAh g–1 at the current density of 500 mA g–1 over 100 cycles.
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  • Amine–silica composites for CO 2 capture: A short review

    Chen, Chao   Zhang, Siqian   Row, Kyung Ho   Ahn, Wha-Seung  

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  • Creep Effect Analysis at the Friction Interface of a Rotary Ultrasonic Motor

    Chen, Chao   She, Chongmin  

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  • Partial Membership Latent Dirichlet Allocation for Soft Image Segmentation

    Chen, Chao   Zare, Alina   Trinh, Huy N.   Omotara, Gbenga O.   Cobb, J. Tory   Lagaunne, Timotius A.  

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  • Study on Sustainable Integrated Program of Dump Open Pit Optimization

    Chen, Chao   Gan, De Qing   Zhang, Ya Bin   Lu, Hong Jian  

    According to the various influencing factor of the dumping plan choice, the fuzzy comprehensive evaluation model is built up, which is based on the fuzzy mathematics theories, the dumping plan is optimized. And take a mine as an example, the tool of computer aided design is used to rebuild the dumping plan, and great economic benefit is obtained.
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