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As drainage pumping station plays an important role in regional drainage, it is of great practical significance to study the optimal operation of drainage pumping station. In this paper, according to the different drainage scenarios (such as daily drainage, superstandard drainage, pre-lowering water-level stage and emergency drainage stage), a nonlinear optimization model of single adjustable-blade pump unit is constructed, with the multi-objective of maximum water discharge and minimum power consumption cost in a certain time. Then onedimensional dynamic programming method is used to solve the model, and a series of optimal decision schemes corresponding to different costs are obtained, including shutdown, startup and blade angle in every period, and maximum water discharge and unit cost drainage. Taking the daily operation optimization of single unit in drainage pumping station as an example, the influences of different shutdown constraints on the results of variable angle optimization are analyzed, and the optimal operation suggestions are put forward respectively for different drainage scenarios, including daily drainage, super -standard drainage, pre-lowering water-level stage and emergency drainage stage. The research conclusion provides a decision-making reference for the optimal scheduling scheme of drainage pumping station in flood seasons. [ABSTRACT FROM AUTHOR]

An horizontality adjustment and control system for the satellite testing platform is introduced in detail. The testing platform is a 4 DOF parallel structure. An adjustment and control arithmetic of the real-time testing horizontality is given by grads theory. Using this arithmetic, the hardware design and the real-time adjustment and control software are achieved. The functions and relations of data collection module, adjustment and control module, control implement module in the software are discussed. The automatic horizontality adjustment and control for the platform is finished in the industry control computer. [ABSTRACT FROM AUTHOR]

Objective: To investigate the levels of Th1/Th2 cytokines in peripheral blood of patients with primary immune thrombocytopenic purpura(ITP) before and after treatment and their clinical significance., Methods: Ninety-eight cases of ITP were treated with glucocorticoid(GC), then were divided into 2 groups: effectively treated group and uneffectively treated group according to efficacy of treatment, 40 healthy persons confirmed by health examination were selected and enrolled in control group. The levels of Th1 cytokines(IFN-γ,TNFα,IL-2) and Th2 cytokines(IL-4,IL-5,IL-10) were detected by cytometric bead array before and at 4 weeks, 3 and 6 months after treatment and the relationship among detected indexes was analyzed., Results: Before treatment with glucocorticoid, the levels of Th1 type cytokines were in 98 patients with ITP were higher and the levels of Th2 type cytokines were lower, compared with the healthy controls(P<0.05). The IL-2/IL-4 ratio was significantly higher than that of healthy controls(P<0.05). After treatment, the levels of Th1 type cytokines in effectively treated group were significantly decreased and the levels of Th2 type cytokines were significantly increased, compared with level before treatment(P<0.05). The IL-2/IL-4 ratio was significantly decreased after treatment for 6 months, compared with that before treatment(1.05±0.43 vs 2.53±0.72)(P<0.05), but the level of Th1 or Th2 type cytokines did not obviously changed., Conclusion: Peripheral blood Th1 and Th2 cells express abnormally in ITP patients, ITP is a Th1 dominated disease; the change of IL-2/IL-4 ratio before and after treatment correlated with the prognosis of ITP patients, displaying clinical significance for ITP individual therapy.