Document NO.1 of the Central Government and the report of the eighteenth National Congress has aroused widespread concern in academic circles with its emphasis on rural micro-management body, while research on spatial organization of organic agricultural enterprise under the paradigm of enterprise network is still insufficiency. The paper analyzed the organic agricultural spatial organization of headquarters, processing factories and bases in China by the end of 2012, which reflects the overall development level of the enterprise network is low, and the organizational structure shows an inverted "T" type distribution. Heilongjiang, Zhejiang, Shandong and Sichuan provinces scale the highest level. Regional organizations are quite different on spatial distribution, while strong networking provinces mainly gather in the east coast, northeast and west regions, and due to the strength of the dominant organizational functions, provinces can be divided into seven types, such as headquarters-type, base-type, headquarters-processing type. Natural resources, geographical embeddedness, institutional environment, flexible production level and regional innovation capability are the five drivers of spatial organization, and measures can be taken to develop organic agriculture from four aspects of policy guidelines, strategic planning, marketing planning and technical guidance.
Based on the theory of bone conduction, a novel circular piezoelectric bone conduction hearing device with a new structure of leaf spring support and excellent low-frequency response is proposed in this paper. The simulation analysis of the circular piezoelectric vibrators with different support ways was carried by ANSYS. And the prototype of piezoelectric bone conduction headphone supported by the optimal way was produced. The experimental test was conducted and the results showed that the maximum response amplitude of headphone could reach up to 26.14μm in the low frequency region ranging from 20Hz to 1000Hz. The zero-distance loudness of the headphone is between 60dB and 90dB, and the 1m close distance loudness is between 30dB and 40dB.The experimental results confirmed that the headphone can meet the hearing needs without healthy risk and ambient noise.
The effect of adjusting feed thermal conditions on the throughput of complex distillation columns was investigated by using the concept of the Fractional utilization of area (FUA) proposed by Liu and Jobson (Chem. Eng. Res. Des, 2004, 82, 3-9). The FUA curve can be used to identify the bottleneck of an existing complex distillation column when the throughput is to be increased. According to the shape of the FUA curve, it can be known that how to adjust feed thermal condition of a complex distillation column to increase its throughput. The results show that the FUA method is a powerful tool for complex distillation column analysis.
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