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Enterprise IT strategy is an important tool for the success of enterprise digitization and informatization. Enterprise application architecture is the core of enterprise IT strategy. Aiming at the shortcomings of traditional enterprise application architecture methodology, this paper proposes a high-level planning methodology, which starts from enterprise business architecture, integrates application status analysis and application solution survey results, and uses suitable application architecture principles to complete the high-level planning of enterprise application architecture. This methodology has been successfully used in many enterprise IT strategy projects, and this article illustrates it with examples.

The leaf-vein drip irrigation emitter is a new type of drip emitter based on a bionic structure able to support shunting, sharp turns, and increased dissipation. In the present work, the results of twenty-five tests executed in the framework of an orthogonal design strategy are presented in order to clarify the influence of the geometrical parameters of the flow channel on the hydraulic characteristics of such emitter. The corresponding flow index and head loss coefficient are determined through numerical simulations and model testing. The results show that the flow index of the flow channel is 0.4970∼0.5461, which corresponds to good hydraulic performances. The head loss coefficient of the flow channel is 572.74∼3933.05, which in turn indicates a good energy dissipation effect. The order of influence of the leaf vein flow channel parameters on the flow index can be represented in a synthetic way as a > b > c > d > e, where (a) is the width of the inlet, (b) is the horizontal distance of the front water inlet, (c) is the vertical distance of the inner edge of the front end, (d) is the horizontal distance of the rear water outlet and (e) is the vertical distance of the outer edge of the front end. The flow index increases with d, decreases with a, first decreases, and then increases with b, and first increases and then decreases with the increase of c and e. The coefficient (R 2 ) of the fitted model related to geometric parameters and flow index is 0.9986-0.9999. The relative errors among experimental testing, simulation calculation and predictive estimates are shown to be less than 5%.

Abstract. CHANGBAI-2 actinomycete strain was obtained by separating different kinds of soils from the nature. Moreover, the morphology, cultural characteristics, physiological-biochemical characteristics and 16S rDNA sequences of this strain were studied. A phylogenetic tree was constructed by comparing with the published 16S rDNA sequences of the related species and showed 99% identity of nucleotide sequence of 16S rDNA with Chryseobacterium. The antifungal substance produced by CHANGBAI-2 was purified by means of macro-porous adsorbent resin, and the crystal of the antibiotic with high purity was got. In this paper, the methods of purification by adsorbing of microporous adsorbent resin and detection by high performance liquid chromatography with mass spectrum (HPLC-MS) were established. The study would be laid a good foundation for its physical-chemical properties.