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.
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.
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.
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.
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.
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).
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.
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.
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.