Through researching the mechanism of biological nitrification and denitrification and actual project application of the technology and related literature materials, the obtained results are as follows:(1) Anoxybiosis is effective to the removal of COD; after the anoxic process, BOD/COD of the outflow increases, it shows that the degradation ability of wastewater is improved; anoxybiosis is insensitive when shock loading of inflow wastewater varies greatly;(2) It is demonstrated by the operation of inoculation and cultivating that biofilm takes two weeks to succeed in cultivating on packings and the removal ratios of NH3-N and COD get 50% and 70% respectively, when gas-water ratio is 6:1, HRT is 7.3 hour, water temperature is above 15°C;(3) It is demonstrated that gas-water ratio, hydraulic loading, HRT, temperature, pH etc are important factors which influence the removal effect of pollutants, when the gas-water ratio is 6:1, hydraulic loading is about 0.38kgNH3-N/m~3.d, water temperature ranges from 15°C to 27°C, pH ranges from 7.5 to 8.0, the BIOFOR removal effect of pollutants is the best;(4) The operation indicated that, this technology has strong ability of nitrification and denitrification; it has extremely vital significance for reducing the water body eutrophication;(5) It is confirmed the feasibility and the usability of preanoxic-BIOFOR process to treat L-lactic acid production wastewater. The experiment indicated that the treatment effect of this technology is very good and also shows that the technology has many advantages, such as small volume, high treatment efficiency, good effluent quality and strong endurance to load variation, this technology is a new and economical wastewater treatment process.

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By coaxially detecting the images of the cutting front and the sparks jet, the relationship between the detected signals and cutting quality, including cutting defects and surface roughness, has been obtained. Self-optimizing control aiming to the best roughness on some certain cutting conditions has been realized.

本文通過(guò)同軸視覺(jué)傳感系統(tǒng)同時(shí)獲得切割前沿和切割火花簇射視覺(jué)圖像精品毛片二区，成功地提取了產(chǎn)生切割缺陷和切割面粗糙度變化時(shí)圖像特征信號(hào)的變化規(guī)律，首次實(shí)現(xiàn)了以無(wú)切割缺陷并且在一定工藝條件下獲得最高切割質(zhì)量為目標(biāo)的切割速度自尋優(yōu)控制韩国免费A片吃奶玩乳视频。

In order to preserve the varieties of the swarm and avoid to be in premature convergence,a Particle Swarm Optimization algorithm based on the differential evolution mutation is proposed.The new algorithm uses the particle aggregation quality to judge that if the particles in the swarm are congregative so much,then apply the differential evolution to mutate the self prevenient best position of each particle,in order to realize the aim of preserving the varieties of the swarm.

為了保持粒子種群的多樣性而避免發(fā)生&早熟&的問(wèn)題99热W亚洲精品国产99，提出一種基于差異演化變異的粒子群優(yōu)化算法，該方法通過(guò)粒子聚集性判斷如果粒子群中的粒子過(guò)于聚集三级片在线无码，則使用差異演化算法對(duì)PSO算法中各個(gè)粒子的自身歷史最佳位置進(jìn)行變異，以實(shí)現(xiàn)保持粒子群種群多樣性的目的国产精品久久永久免费。

The new algorithm uses the particle aggregation quality to judge that if the particles in the swarm are congregative so much,then apply the differential evolution to mutate the self prevenient best position of each particle,in order to realize the aim of preserving the varieties of the swarm.

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The results showed that the Eleocharis tuberosa quality was the best with intermitent irrigation treatments,while the content of soluble sugar and starch was high and the moisture content was low.

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Optimized the preparation of chitosan hydrogel technological conditions, and the result indicated that: the hydrogel with best quality can be gotten, with the chitosan quantity 1 g, the formaldehydevolume 0.2 mL, the gelatination temperature 50℃.

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In order to insure the teaching object completely bring to success, to insure the classroom teaching quality steadily improve, to promote the students body and mind healthy development and to obtain the best teaching effect. The teacher must innovate the traditional teaching design concepts and must put up system optimize design with the elements that impenetrate the teaching process, the structure of each element and the teaching tache with the guidance of modern teaching design theory.

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The results showed that all the four macrophytes had abilities to resist hydraulic impact loading, and were adapted to the dynamic instability of quality and quantity of inflow water. All the plants could decontaminate COD, NH3-N, NO3-N, TN and TP in the sewage with different efficiency, in which Oenanthe javanica and Myriophyllum verticillatum L. had the best comprehensive purification ability.

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