The problem of robust L∞ reliable control for a class of time-delay systems with controller failures is investigated. Based on the idea of switching, the system with possible failure of the controller is transformed into a switching system with two subsystems, one of which is a stable subsystem without controller failure and the other is unstable in the event of controller failure subsystem. By using the multiple Lyapunov function theory and the average dwell-time method, the exponential stabilization and L∞performance of LMI are obtained, and the design scheme of the L∞reliable switching controller is obtained. Finally, the effectiveness of the scheme is verified by simulation.

Polyaluminium chloride (PAC) and PANDCD compound with coagulant was used to coagulate solute colloid or suspended particles in dye wastewater from a coloured socks factory. The influence of pH, coagulant dosing quantity, coagulation settling time on the coagulant performance are investigated and the coagulant performance was evaluated by the removal rate of COD and chroma. The results indicate that: compound coagulant in the treatment effect is better than single coagulant|the best operating conditions for compound coagulant to treat the dye wastewater was: compound coagulant dosage 10 mg/L, coagulation settling time 25 minutes, pH=7. In this case, the removal rate of chroma was 97.7%, removal rate of COD was 67.2%.

The article adopted a kind of biological treatment technology of the circulating cooling water treatment. To four of the same water sample with different content of an enzyme preparation, determine water COD and ammonianitrogen through the effect of enzyme and microorganism. The results show that: The water samples have enzyme preparation played a significant effect to the degradation of COD and ammonianitrogen compared to the water sample with no enzyme preparation, and with the improvement of enzyme preparation content, the effect of the degradation of COD and ammonianitrogen reveals more and more good, and treated water is neutral. When enzyme preparation of dosing quantity for water sample of thirtytwo over one thousand, the removal rate of COD as high as 89% and ammonianitrogen as high as 95%.

This research is mainly about the electrochemical oxidation technology for the treatment of waste water from biochemical pool of the acrlic fiber company, using the national standard test method for COD, NH3-N, chroma and chlorion as four indicators for analysis. The results show that chroma, ammonia nitrogen and COD can be effectively removed in the process of electrolysis. Among them, ammonia nitrogen removal rate is up to 100%, while the chroma removal rate is up to 99%,and COD removal rate is up to 89%. After the completion of the reaction, chlorion content also can be reduced to a national level of discharging standard, which indicates that electrochemical catalytic oxidation technology has a rather good application prospect. Through the analysis, we can make a conclusion that chroma and ammonia nitrogen can be completely removed within 10 min and 30 min respectively. The ammonia nitrogen removal rate is a function of electrolytic voltage, and chlorion has response characteristics of the first order reaction, COD removal rate constant and chlorions removal rate constant has a good correlation. This will be instructive for the design of electrochemical oxidation reactor and industrial operation.

In the production of hazardous chemicals present through the use or process of enterprises and institutions to investigate, determined the focus of prevention in Fushun City, and established a spatial database of dangerous goods and hazardous source spatial database. The environmental mathematical model was integrated into the geographic information systems, the use of geographic information system software MapObject and programming software Visual Basic 6.0, established Fushun unexpected environmental pollution emergency information. The system can simulate the migration of pollution diffusion process group to predict pollutant concentration and time of arrival, location in the event of accident quickly and easily in the event of accident, warning information timely in order to start the plan, prevent and mitigate the losses caused by pollution.

 

A mass proportion paraffin and microcrystalline wax was adopted as raw material, and under certain conditions catalyzed oxidation reaction took place, a sample which qualify and performance similar to that of natural carnauba wax was obtained. By using oxidation wax as experimental material and water as solvent, under the surfactants’action, after the reaction of emulsification, polishing and decontaminating wax for leather was prepared. Then some factor's effects on stability of emulsifying wax, such as emulsifier type, quantity, stirring speed, emulsifying time and emulsifying temperature were discussed. The results show that when the dosage of oxidation wax: the mass fraction of auxiliary,emulsifier and emulsifier is 1∶0.3∶0.000 2, emulsifying time is 20 min, stirring speed is 500～1 000 r/min, emulsifying temperature is 85～90 ℃, the wax for leather whose feature is well-distributed, well function and low cost which compared with the natural carnauba wax is obtained.