The precise motion control of a hydraulic motor system has some problems due to uncertain disturbance, complex nonlinear dynamics. Traditional methods are difficult to obtain the desired control performance. In this paper, a new fuzzy neural network (FNN) combined with terminal sling mode control (TSMC) and time delay estimation (TDE) is proposed. FNN is used to adjust the parameter of TSMC to reduce the time for the system to reach the equilibrium point and chatting. To increase the accuracy of the system, TDE is used to compensate the error caused by uncertain disturbance. This controller was simulated in Amesim and Simulink, and the results showed that the control scheme proposed in this paper has the smallest angular displacement error, angular velocity error and variance than other control schemes, such as PID and sliding mode control (SMC). Furthermore, the designed controller was implemented on a drill pipe automatic handling manipulator, and its control performance was verified.
Reactive power compensation is an effective technical measure to reduce the energe loss in sewage pumping station.Combining Huangshi Ci Lake Sewage Treatment Project,this paper analyzed the problem existing in the pump motor reative power compensation,and expounded the principle of local reactive power compensation.The technical issues should be noted in the application of local reactive compensation were put forward,and the good economic and social benefits have been achieved.
It has been consistently demonstrated that initial exertion of self‐control had negative influence on people's performance on subsequent self‐control tasks. This phenomenon is referred to as the ego depletion effect. Based on action control theory, the current research investigated whether the ego depletion effect could be moderated by individuals' action versus state orientation. Our results showed that only state‐oriented individuals exhibited ego depletion. For individuals with action orientation, however, their performance was not influenced by initial exertion of self‐control. The beneficial effect of action orientation against ego depletion in our experiment results from its facilitation for adapting to the depleting task.
Combined with reconstruction and extension project practice of Qingshan Lake sewage Treatment Plant in Huangshi City,the main contents of sewage treatment in-line monitoring are expounded.Functious,software and hardware configuration of monitoring system are introduced.Control principle of PLC in in-line monitoring of sewage treatment and I/O distributed structure are described in detail.Running practice shows that application of fieldbus-based PLC technology in in-line monitoring of sewage treatment is the best choice,and good economic and social benefits were obtained.
The article explicates the reliability of power supply system which is the key for safety operation in sewage treatment plant.It introduces the familiar malfunction of power supply lines and equipment distribution in sewage treatment plant and analyzes its causes.The article also puts forward the actual technical measures and methods in increasing the reliability of power supply system in sewage treatment plant by combining the operation in sewage treatment plant.
Autobiographical memory, with special inherent structure, is a complex component of long-term memory. It has a close relationship with semantic memory and episodic memory and is also connected with many other psychological cognitive processes, such as the emotional process, self-referential process etc. Accordingly, the neural correlates of autobiographical memory consist of many brain areas, including the frontal lobe, temporal lobe, superior parietal lobe and the adjacent occipital area etc. All of the brain areas mentioned above are mainly on the left hemisphere. This article summarizes the previous researches on autobiographical memory and its neural correlates. Given the complexity of autobiographical memory, we divide different cognitive processes of autobiographical memory into 5 operating components from the perspective of memory-system. These operating components include semantic component, episodic com- ponent, self-referential component, emotional component and general cognitive processing component (cognitive process related to general memory retrieval), and each component has its underlying neural correlates. What is more important, these operating components interact with each other coherently within the autobiographical memory system and this article discusses these interactions and connections in depth. These interactions analyzed in this article includes the semantic & episodic interaction, the self-referential processing & general cognitive processing interaction, the emotional & episodic interaction, the general cognitive processing & episodic interaction and the general cognitive processing & emotional interaction. By taking the interactions among the operating components into consideration, different ideas and opinions to integrate the experiment findings are offered, and new ways and solutions to settle some heating debates in the field of autobiographical memory are proposed. Furthermore, this article points out that even though the operating components of autobiographical memory system are closely connected with one another, the previous researches didn't pay enough attention to it. This article analyzes two problems existing in the previous studies. First, most of the previous researches spent much effort in analyzing the different acti- vated brain areas among different experiment tasks, while leaving the common brain activation alone, which might reflect the interaction and connection among the operating components. Second, those studies investigating neural correlates of autobiographical memory using brain imaging techniques tended to overlook the different brain activations at different time points, and these temporal differences may carry important information about the neural mechanism of autobiographical memory. Finally, the article pro- poses two analytical methods in order to solve the problems mentioned above to some extent. First is using multi-voxel analysis instead of the conventional analysis method to reveal the useful information held by the common activated brain areas, second is employing time series analysis to analyze the changes of brain activation pattern in the temporal dimension. In sum, if researchers are going to investigate the neural mechanism of autobiographical memory thoroughly and offered more convincing evidence, they should treat the various cognitive processes of autobiographical memory as a whole, take the interactions among different components into consideration and pay more attention to the neural correlates underlying these interactions.
Wear pump failure is failure leaves three main forms-fracture,corrosion and wear one form of failure.Theoretically the pump blade failure mechanism was worn on,the impact of wear failure leaves the various factors was analyzed,combined with practice pumping station operation and maintenance experience,the focus at a reasonable selection,surface heat treatment,non-metallic protective coating alloy powder spray repair welding and welding six aspects,premature wear of the pump blade technical measures and repair methods was prevented in order to enhance its effective life.
Combining with the process features of a sewage treatment plant,by using the powerful programming and controlling functions of PLC and aided with some monitoring elements such as level gauge,this paper improved the control system of a cleaning machine by replacing the relay control with PLC control.The practice shows the sewage floating pollutants can be removed.
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