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A novel and simple structure for improving CMRR is introduced. This structure can be added to the circuits like folded cascode amplifier, telescopic amplifier, current buffers, .etc to improve the CMRR of these circuits. This simple and effective circuit uses common mode deviating technique to improve CMRR at least 12dB while preserves CMRR bandwidth which is a novel technique in order to improve...
A high voltage charge pump design is being presented in this paper. The design is based on Dickson charge pump, constructed with diodes by using AMS 0.35μm technology. The innovation is made in Dickson charge pump i.e. charge control PMOS transistor is used in each stage of charge pump. PMOS transistor is used in series with charging capacitor which reduces the power consumption during the clock transition...
Multiple-sensor Synchronous data collection system was developed on the base of RS485 distributed single-chip and the sensors of resistance spot welding current, voltage, electrode displacement and electrode pressure met spot welding process real time monitoring. The results show that the incomplete fusion defects of aluminum alloy pulse spot weld can be judged by the electrode displacement range...
The financial crisis which sweeping the whole global has destroyed many enterprises to extinct, But there are also companies in the wake of the financial crisis become the more powerful, the reason is that the dominant force of innovation promotes the enterprise sustained development and growth. The effect of the dominant force of innovation make the dynamic energy and potential energy of company's...
Base isolation is one of the most promising alternatives among the structure control methods. In recent decades, base isolation has been seriously considered for civil structures, such as buildings and bridges, subjected to ground motion. Seismic isolation technique had been applied successfully abroad, especially in Japan, and buildings with seismic isolation design had good performances in the earthquakes...
Coagulation-microfiltration process was used to treat the wastewater containing silver from silver powder factories. Adopting sodium hydroxide as coagulants, four stages tests were conducted. The membrane fouling in coagulation- microfiltration treatment wastewater containing silver was researched. The effect factors of the membrane fouling, such as the volume of the effluent, the mixed liquor suspended...
To prevent or limit flexural cracking in the negative moment region normally with a spiky rise and rapid reversal, a stiffened steel-concrete composite section (SCPR) was proposed The proposed section was composed of concrete and steel plate with perforated stiffening rib plate to reduce the dependency of shear transfer on interfacial bond. Eight scale specimens were tested for comparison. Six specimens...
Illustrated with Qiantang estuary , Hangzhou Bay, the relationship between structure of coastal geomorphology and dissipation of tidal energy were analyzed and the landscape ecological mechanism of watershed flood was studied based on the theory of the landscape ecology and quantitative assessment method of landscape characteristic index. By Correlation analysis and multiple linear regression analysis...
This paper based on the investigation of molybdenum comprehensive utilization status in China, according to in-depth analysis of the nature of molybdenum tailings and re-use value, proposed molybdenum mine tailings for the recovery of scheelite, manufacture of inorganic fertilizer, glass, ceramics and other comprehensive use, and put forward some suggestions to the enterprises about molybdenum mine...
This paper presents a speed-sensorless control algorithm for induction motors, based on the stator flux-oriented control. The algorithm has the advantage of insensitivity to rotor parameters and load varying, stator flux and rotor speed is closed loop controlled respectively. The main improvement is that stator flux is estimated based on a modified integrator which is developed to solve the problems...
A drive for Brushless DC motor (BLDCM), which is fully based on the adaptive fuzzy controllers, is presented in this paper. One of the fuzzy controllers is used in the speed feedback loop to guarantee the accurate speed control. The other fuzzy controller is used in the current feedback loop to track the current change. The proposed full adaptive fuzzy controllers have the characteristics of robustness,...
This paper presents a novel method to detect the volt-ampere characteristic of vacuum arc. Highlights of this paper can be concluded that: the basic structure, computation models, designing principles and procedure, and selection criterions of materiel and electromagnetic parameters of the coil are analyzed respectively. The main clue of this paper is the operating principles of the Rogowski Coil...
In this paper rut resistance behavior of pavement structures combined by the different asphalt mixtures is presented. Nine types of Hot Mix Asphalt (HMA) and ten types of their different combinations are experienced with China's wheel tracking tester in this study. They are composed of three types of aggregate gradation including a coarse, a middle and a fine gradation of norminal aggregate size of...
The proposals for the “More Electric Aircraft” place a significant, increased demand on the electrical power distribution system. To increase safety and reduce aircraft maintenance times on the ground, there is a greater need to quickly identify and locate electrical faults within the electrical distribution system. The work presented in this paper forms an initial study into the use of power system...
This project has been oriented to the development of an energy system unit for powering tramways during shorts periods of time. The aim of this work is to present the results obtained for a high frequency DC-DC converter which is included in the energy unit. The energy unit will consist on two type of energy storage devices: a battery stack and a supercapacitor stack. A comparison of the simulated...
This paper presents the design and analysis of a novel machine family of Slotless Permanent Magnet Brushless DC motors (PMBLDC) for precise positioning applications of spacecrafts. Initial design, selection of major parameters and air gap magnetic flux density are estimated using the analytical model of the machine. The proportion of the Halbach array in the machine was optimized using FE to obtain...
We present an algorithm that on input of an n-vertex m-edge weighted graph G and a value k, produces an incremental sparsifier G with n-1+m/k edges, such that the condition number of G with G is bounded above by Õ(k log2 n), with probability 1-p. The algorithm runs in time Õ((m log n + n log n) log(1/p)). As a result, we obtain an algorithm that on input of an n × n symmetric diagonally dominant...
Different models have been proposed for modeling the IV-characteristics of diodes. In this paper we present a simple model, which describes both the IV- and the temperature characteristics of a SOI-pin-diode and can be used for different diodes types. It is well known that the DC-characteristics of a diode can be approximated by the simple Shockley-equation. However, when a more exact modelling of...
The novel wideband antenna presented in this paper is the monopole with parasitic elements to achieve the wideband frequencies by arranging the elements of strategy. There are wider bandwidth range between 60MHz and 210MHz for the impedance below -10dB for the test and horizontally direction of this kind of antenna, which agrees with the simulation results. The antenna structure is simple and easy...
This paper elaborates the approach about how to establish the evaluation index set of emergency preparation capability in urban communities. It also discusses the construction program based on fuzzy analytic hierarchy process by analyzing the factors which affect the urban emergency response capability. Then we build an emergency preparation capability model for urban community and provide new approaches...
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