The objective of this research is to study the ultrasonic attenuation effect on metallurgical properties of specimens. This study uses the various metallurgical grain sizes, using the ANSI1025 grade low carbon steel and ANSI316 grade stainless steel as base metals and shielded metal arc welding with...

It is important to evaluate the workpiece whether the surface is defective or not. Because of the shadow area due to light angle by taking pictures, false edges are obtained. It will lead to that the real edge will be mistaken for surface scratches. Based on region growing, this paper introduces a new...

This paper proposes a novel method to estimate 2FSK-LFM compound signal based on joint FRFT-ML. The representation of the compound signal in FRFT domain is derived and the chirp rate and the code length of the compound signal are estimated. Joint with ML method, a high accurate local search approach...

The interaction between radar signals for cooperative targets and the Nyquist Folding Receiver (NYFR) is investigated from a zero-sum (ZS) game theory perspective. Since the sub-Nyquist sampling is a tradeoff in noise folding with signals versus dynamic range of analogy-to-digital converter (ADC), a...

The harmonic aggregation in wind power generation is widely concerned in engineering practice. In this paper, large volumes of voltage and current data in wind farm was measured and analyzed for exploring the distribution rules of harmonic current amplitude and phase, based on which, the probabilistic...

Cryogenic fuel tanks are key parts of the launch vehicle. This paper presented a method of the liquid nitrogen level measurement for cryogenic fuel tank based on thermistors and metal film resistances. The measurement model and measurement principle had been detailed in this paper. Error analysis was...

For multi-freedom prosthetic hand, grasping stability is very important. Force closure method is often used to determine grasping force of each finger. The space position information must be obtained to compute grasping force by using this method. However, for prosthetic hand, the space position is hardly...

The noise measurement and analysis system of multi-channel was used at a test of high-speed intercity railway coaches analyzing the noise at different operating conditions and different speed, the sound field distribution in the intercity high-speed railway coach was tested and analyzed. The results...

In the reverberation room, the absorption coefficient is measured by the composite structure of perforated plate, perforated plate and porous sound absorbing material, and the sound absorption characteristics of perforated plate are studied. Through the analysis of the data ,it is founded that: under...

Non-linear model of displacement and sensor detection is usually used in multi-DOF precise displacement measurement. The computing burden of these models is often too large to satisfy the need of real-time performance of displacement measurement. This paper proposes a parallel computing method based...

Nowadays, there are increasingly obvious contradictions between the wood production and the rapid development of national economy. In addition, there are wild work, extensive management and astonishing waste in the forestry production and management field. The major work for the forestry workers of China...

To achieve a human like grasping with a multi-fingered robot hand, the grasping force should be controlled with using information from the grasped object such as its weight. In this paper, we propose a method for estimating the weight of a grasped object using the force output of Force Sensor Resistor...

Using the modern time series analysis method in the time domain, based on the ARMAinnovation model, a steady-state Kalman estimator for descriptor systems with colored noise is introduced,and employing the state observer principle, the pole-assignment descriptor steady-state Kalman estimator is also...

In view of the health inspection of tower crane, the paper puts forward an ARX model to detect the status of the tower crane structure which uses the node displacements of tower crane below standard section as input and the up standard section of the node displacements as the output. Combining with statistical...

Sensor positioning plays animportant role in wireless sensor network (WSN). Thesensor location information is indispensable to a lot of applications. This paper analyzes the wireless sensor node measuring algorithm and the principle of classification, focuses on analyzing the signal strength based ranging...

In order to improve amputees quality of life, electromyogram (EMG) prosthetic hands have been developed to compensate for some daily activities. A force estimation method for prosthetic hands using surface electromyotraphy is proposed in the paper to help amputees. One hand of the subject is tied to...

According to warship combat system dynamic alignment demand, a coordinate system aligned combat system was established in this paper, the mainly coordinate conversion were derived, sensor measurement errors caused by warship's attitude were calculated and simulated by computer. Simulation results show...

By examining the measuring method of screen clothes-shoes' resistance, the paper proposes a reasonable and effective measuring method of screen clothes-shoes' resistance that can ensure the proper implementation of the preventive test of screen clothes-shoes.

Wind energy is renewable and clean energy which has the most mature technology and the development conditions. Wind power generation provides the basis for the harmonious development between man and nature. The wind turbine is working under the natural environment, as a result, it is inevitable to be...

The shale matrix is composed of organic matter and inorganic matter. Methane often adsorbs in organic pores and water adsorbs in inorganic matter. Adsorption layer blocked the spaces of pores, and leads to the decrease of porosity and permeability. However, the influence of adsorption layer on shale...

In this paper, a ZigBee wireless ethanol vapor sensor system has been presented. This system is based on quartz crystal microbalance (QCM) coated with graphene nanowires as sensing element. This system is a QCM ethanol vapor sensor network, and we use star network to construct it. It consists of two...