Applied Mechanics and Materials Vols. 236-237

Abstract: In order to investigate the chiral interfacial assembly of special amphiphile, a trigonal Schiff base compound with long alkyl chains was designed and synthesized, and its supramolecular assembly and interaction properties were investigated by spectral and morphological measurements. Condensed monolayers were obtained on pure water surface, in which flat and uniform domains were obtained for the monolayers. When an anionic tetrakis(4-sulfonatonphenyl)porphine (TPPS) was added into an acidic subphase, an in situ complex formation between the trigonal amphiphile and TPPS occurred. The complex monolayers were transferred onto solid substrate and TPPS existed as J-aggregate and J-aggregate in the complex films. Due to the multisited positive charges in the spacer on acidic subphase, the complex films of trigonal amphiphile with TPPS appeared as short nanorod structures and formed two-dimensional (2D) conglomerate chiral domains.

Abstract: In order to investigate the supramolecular assembly and coordination interaction of special amphiphile, a trigonal Schiff base compound with long alkyl chains was designed and synthesized, and its supramolecular assembly and interaction properties were investigated by spectral and morphological measurements. It was found that the Schiff base compound can be spread on water surface to form stable monolayer. When on the Zn(II) ions subphase, an in situ coordination can occur for all ligands. As a result, a 1:2 complex was formed for the trigonal chain Schiff base with Zn(II) ions through the coordination interaction. Due to the directionality and strong matching of coordination, two Zn(II) ions can be encapsulated into intramolecular space of the trigonal Schiff base compound.

Abstract: A kind simple structure and convenient operation of automatic injector is designed in the paper. It can be placed on the desk with the friendly interface. Its core components are AT89C51 and stepping motor. SCM can be controlled by the corresponding key to send the logic control signal through software programming. In order to achieve the automatic injection function under different speeds at 20 ml, 30 ml and 50 ml liquid level, automatic injector is drove by the different statuses of stepping motor, such as open and stop, acceleration and deceleration, turning and reversal, etc. For driving stepping motor more better, the drive chip ULN2003 is used. The speed, the turning direction and the injection dose of stepping motor is displayed with LED. It realizes the well-proportioned injection, avoids the error caused by artificial operation and uncertainty, and reduces the pressure of the medical staff.

Abstract: An electronic clock display system was designed by the paper with LCD display based on Renesas 78K0R serial MCU. The system completely took the energy-saving MCU production and LCD Panel as the core and was accomplished with C depending on specified integration platform. It can be applied in people’s daily life and manufacture, and will have the good application and promotion prospects.

Abstract: Quench detection signals could associated with several thousands high volts to ground at some fault cases during EAST operation process .Detection system should be withstood 10 kV to ground and isolated with followed control units safety according to the design standards.Optical fiber amplifiers could be isolated high volts with control units and also eliminated noise effectively in long-distant transmission. The following optimization design had been realized to improve their electrical performance greatly .The design principles & the following optimization design of the amplifiers and related experiments results had been covered in the paper. Amplifier is the loss of the protection unit of the top class of ultra-protection, the voltage signal to the cable in a superconducting device voltage is very small, once quench 10KV high-voltage ground, if you do not take the high pressure and isolation of high-handed measures,strong high pressure will bash our class after the second compensation equipment, hardware equipment and acquisition system, power supply circuit, the amplifier performance stability, reliability and lasting protection play a crucial role in the loss of ultra-protection system, it acts as a striker's role, to play the role of ties also signal down-level transmission.

Abstract: In this study we present a new framework to assess line micro quality of multicolor prints adapted to a low-cost image quality analysis system based on common flatbed scanner. The contribution elements including quality metrics, measurement principle, applying methods and detection instrument, which were complemented and sorted in terms of ISO 13660 standard, were described and a case experiment was conducted to survey the output performance of both inkjet printer and xerographic printer, two most popular digital printing technologies. Their qualities were compared in details rendering angle such as width and straightness of line, raggedness and blurriness in line edges, as well as darkness and contrast in color. The results verify the efficiency and shortcomings of the framework. Meanwhile, the metric values let us take an investigation in the character of each digital printing technology in micron size.

Abstract: The monitoring system for progressing cavity pump operating conditions based on dual-microcomputer is developed to fit the electronic parameters measurement characteristic and requirement of progressing cavity pump. By measuring the electronic parameters of progressing cavity pump driving motor and combining the internal losses of electrical motor, the torque and speed of progressing cavity pump polished rod are calculated accurately, to make correct decision for the oil wells working condition. Using the modular design method, the acquisition, storage, human-computer interaction and other necessary hardware is presented. The program flow charts of host-slave is designed respectively, Parameters calibration and communication module are mainly elaborated, in the meanwhile, computer’s data processing and fault diagnosis software are designed. The designed system has been successfully applied in oilfield, realizing the monitoring of screw pump’s working condition,ensuring the efficient operation of oil production system.

Abstract: The appropriate blood pressure, as an important physiological parameter for reflecting the status of cardiovascular system, can maintain the normal metabolism of human body. In this paper, the electronic sphygmomanometer system based on the oscillometry adopts the MSP430 microcomputer as the core microprocessor, the pressure sensor as signal collector, LM324 as the core analog signal processing chip. The system consists of the cuff with inner air bag, baroceptor, signal processing unit, gas-charging or degassing unit and microprocessor. Controlled by the microprocessor the gas-charging or degassing unit can inflate or deflate the cuff, and the pressure signal from the pressure sensor is processed by the signal processing unit to become the blood pressure value by using oscillography. The system can reduce the number of chips and components as far as possible, featuring low cost and consumption.

Abstract: ECG signal is, as a vital method performed on the heart study and clinical diagnosis of cardiovascular diseases, an important human physiological signal, containing the human cardiac conduction system of physiological and pathological information. Aiming at the weak low frequency characteristic of ECG signals, the core circuit based on the AD620 and LM324 amplifier is given. After analyzing the major components of the ECG signal and the frequency range of interference, weak ECG signal collected by the electrodes is amplified by the preamplifier circuit, and the interference then is wiped out by using a low-pass filer, a high-pass filer, 50Hz notch filer and back amplifier circuit, finally a right wave of ECG is received. The characteristics of the system features the merits of high input impedance, high CMRR, low noise, less excursion and high SNR(signal to noise ratio), low cost and so on.

Abstract: Safety level is the key input to the development process and assurance process of airborne electronic system, and is influenced by both the safety effect and the architecture used. The paper focuses on the determination of principle how the architectures influence the level assignment. The relationship between system safety objectives and assurance process was discussed; six architectures were studied in aspects of capability of common error limitation, and the concept of independence was introduced to characterize the architectures. The method to assign levels considering architectures influence was proposed using architecture independence concept, and a yaw damper system was studied for assurance level assignment to verify the principal.