Advanced Materials Research Vols. 314-316

Abstract: The paper presented the Medical Wireless Sensor Network model with combining battery energy, environment energy and human body energy to provide energy supply. Also, the paper discussed sensor node planning designed by means of ZigBee technology. After combining the application of Internet, it could not only carry out remote localization, but also ensure the accuracy, sensitivity and safety of close monitoring.

Abstract: Real-time monitoring is an important function for manufacturing execution systems (MES). In order to acquire the real-time data information, RFID technology is used to collect the data in shop-floor. This paper studies RFID middleware for the real-time monitoring in discrete manufacturing. Firstly, a process flow model is proposed. And the model of the process flow is converting into a manufacturing node flow. Secondly, RFID devices are configured for the manufacturing node. And a formalized description for RFID middleware mode is suggested. For the sake of resolving the model of RFID middleware, the data process policy is studied, and the real-time status of the monitored part is acquired. At last, a prototypical software system is developed to demonstrate above ideas.

Abstract: Modulation transfer function resulting from random vibration was analyzed. To conclude that the effect of angular displacement was the major factor. Allowable MTF degradation was represented, and convert allowable MTF degradation into stable system design parameters, which can guide perfect design for stabilization system. Based on the spatial mechanism and translational principle of parallelogram, an irrotational displacement isolator was developed. It can meet the requirements of irrotational displacement and damp. An instance was given; and 34dB reduction was achieved at frequency of 100HZ. With the help of MSC.ADAMS simulation software, simulated curve proves correct for isolator, and the irrotational displacement mechanism was tested by optical method, coupled angle is less than 8″, it can satisfy the demand of aerial imaging.

Abstract: According to the working characteristics of working device of WDJ25 multi-functional undercover excavator, the study had calculated and analyzed the mining force of bucket rod oil cylinder and crushing force of bucket oil cylinder of full schedule theory .The force change curve accurately described full schedule working ability of bucket rod and the bucket.

Abstract: Advanced process control (APC) has been recognized as a proper tool for maximizing profitability of semiconductor manufacturing facilities by improving efficiency and product quality. Run-to-run (RtR) process control with good quality and reliable performance for APC applications are most applicable. Chemical mechanical planarization (CMP) is part of critical processing module in semiconductor manufacturing. This paper proposes a new RtR control scheme, modified double EWMA controller (m-dEWMA), which is adaptive to the mixed product CMP processes. The m-dEWMA controller combined thread dEWMA with the drift compensation scheme to deal with the drift and shift disturbances caused by tool and products, respectively. Comparing recently mixed product control schemes: threaded EWMA controller, JADE control and threaded prediction correction controller (threaded PCC), the simulation results show that the m-dEWMA has better control performance than other controllers. The experiment results revealed that the m-dEWMA controller improves the wafer uniformity significantly in mixed product CMP process.

Abstract: There are some problems with traditional mark replacement and accurate detection of overprint deviation, this paper presents a new method which can detect the parameter of the no mark overprint. The method is based on the basis of mathematical morphology to determine the sign of the multi-structural elements and multi-scale morphological edge, by using detection algorithm to extract image edge; and then the image edge was fitted by using least square fitting algorithm, so the sub-pixel center coordinates of the overprint mark can be obtained; Finally, accurate data of the overprint deviation can be obtained by using deviation operation formula. Theoretical analysis and experimental results show that the overprint deviation detection has high precision, which can help to improve the accuracy, real-time and automatic control of overprint. So it can ensure that the whole picture's tone and hue of printing image can be reproduced accurately.

Abstract: On the basis of zero-crossings detection, a new method of speech segregation is proposed using these clues of Interaural time difference(ITD), zero-crossings peak amplitude(ZCPA) and zero-crossings power. The estimation of ITD is utilizing the statistical properties of zero-crossings detected from binaural filter bank outputs in order to get more reliable ITD estimation in noisy environment. Signal phase ambiguity in the high frequencies is solved by correcting the signals in the high frequency channels by means of the ITD values calculated by ZCPA algorithm in the low channels. Spline interpolation is used for sound segregation in order to make sound signal segregated correspond to the original sound signals as much as possible. The test for sound segregation in various mixture sources is made. The results show that the method can make can segregate various mixed sound sources effectively. The advantages of the proposed method are the robustness to noise, the less computational complexity and no need to train the masks for sound segregation.

Abstract: In the 6σ-based product quality management system, influencing factors of 5M1E (man, machine, material, method, measure and environment) are the key points to ensure the quality of products reach 6σ level. However, because the traditional quality control methods only focus on the factors of machine, material, method and measure but ignore the factors of man and environment and their relationship on product quality, the 6σ level objective of product quality cannot be implemented well. As such, this study proposes an improving approach for 6σ-based multi-process machining environment whose objective is to build the connection relationship and model among operating environment, workers and product quality. Through adjusting the values of operating environmental parameters, the behaviors of workers on machines can be controlled and the product quality can be improved. This study provides a new solution for 6σ-based product quality control and management.

Abstract: In order to improve the application of nano-particles/polymer composite, we investigated the relationship between microstructures and electrical properties on injection molded composites made from carbon black(CB) particles mixed with polypropylene(PP). Standard tensile specimens were injected under different processing conditions, after which, the specimens were cut off along the surface to observe the microstructures at different positions of the moldings. The microstructures were observed with Scanning Electrical Microscope(SEM), and electrical properties were measured by using a two-terminal standard resistor under DC condition at room temperature. The results showed that CB nano-particles may form the best conductive path under the higher packing pressure combined higher injection pressure. If packing pressure is low, the resistivities at the skin zone loaded by high injection pressure are smaller than low injection pressure, but the resistivities increase at the sub-skin zone. We found that the sub-skin zone is a high resistivity district which would expand with higher injection pressure matched lower packing pressure. Contrast to the injection molded polymer whose microstructural orientation is stronger at the sub-skin zones, injection molded CB particles/polymer composites develop strong oriented microstructures at the core zones in stead of the skin or sub-skin zones due to CB particles’ migration.

Abstract: During the entire life cycle of a vehicle, from design, manufacture, usage to final recovery, there exist very complex materials, energy and information flow as well as the interactions among different stages. To better understand this closed loop, it’s important and significant to model the whole loop from a system engineering point of view. This work proposed a unified modeling method based on enhanced IDEF0. By taking materials flow, information flow, energy flow as well as the interactions among processes into account, a holistic hierarchical model for the entire life cycle of vehicles was established in this work, which helps to provide a novel way of understanding the recovery infrastructure, identifying the key issues to be tackled, and further finding the opportunities to improve it.