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Abnormal activity sensing has attracted increasing research attention in military surveillance, patient monitoring, and health care of children and elderly, etc. Researchers have exploited the characteristics of wireless signals to sense “keystrokes” and “human talks”, relieving the privacy invasion concern caused by mounting the surveillance cameras or wearing the smart devices. However, existing...
Traditional substation station power are taken from the grid system, power consumption is relatively large, not only increases the power loss, but also the consumption of nonrenewable energy. With the development of micro-network technology, more power users tend to use the new micro-grid power supply mode to improve power supply reliability. In this paper, the power supply system of 500kv substation...
The four-wheel torque and the four-wheel corner are controlled independently in the four-wheel independent drive and steering electric vehicle with steer-by-wire system. The road feeling simulation is different from the traditional two-wheel steering vehicle. The paper is suitable for the four-wheel steering vehicle simulation control algorithm. The principle of road feeling simulation control is...
Due to rich characteristics and functionalities, PDF format has become the de facto standard for the electronic document exchange. As vulnerabilities in the major PDF viewers have been disclosed, a number of methods have been proposed to tame the increasing PDF threats. However, one recent evasion exploit is found to evade most of detections and renders all of the major static methods void. Moreover,...
With the electronic packaging techniques and electronic equipments toward a high integration and miniaturization development, high thermal conductivity and excellent thermo-mechanical properties of polymer-based composites have attracted significant attentions in the recent years. SiO2 as a common inorganic filler has been widely used in electronics packaging materials, due to its low coefficient...
A wet chemical approaches affiliated with the traditional colloids has been introduced to provide the nanometer silver particle with nanostructure for the fabrication of the Ag active SERS substrate. The ultra-simple and facile method has been demonstrated. The Ag silver particle was reduced from AgNO3 in the presence of polyacrylic acid (PAA) and ethanol amine (EA) acting as the surfactant and co-surfactant...
Nano-sized spherical SiO2-filled polymer-based underfill play an important role in improving the reliability of high-density flip-chip packaging. However, how to allow extremely high filler loading while maintaining a low viscosity and meanwhile how to achieve desired coefficient of thermal expansion (CTE) with lower filler loading are two major challenges due to the serious agglomeration of nanofillers...
The novel liquid epoxy moulding compound (EMC) material with high thermally conductive and good heated resistance was prepared by epoxy, cyanate and alumina filler. Rheological properties, curing behaviors, mechanical and thermal properties of the resultant materials were investigated by rheometer, DSC, SEM, TGA, TMA and DMA, respectively. The results showed that the cyanate ester modified epoxy and...
Predictive display is a promising approach to tackle large time delays that greatly degrade the performance of tele-operation systems. In this paper, a unified predictive display scheme is proposed to deal with multi-time-delay multi-rate measurements and missing data, which is applicable for real systems. Firstly, a formal description of predictive display problem is introduced. Next the method principle...
A new change detection method for heterogeneous remote sensing images (i.e. SAR & optics) has been proposed via pixel transformation. It is difficult to directly compare the pixels from heterogeneous images for detecting changes. We propose to transfer the pixels in different images to a common feature space for convenience of comparison. For each pixel in the 1st image, it will be transferred...
The battery pack anti-vibration safety was analysed by structural intensity Finite Element Analytical Method and the battery pack intensity, stiffness and anti-vibration FEA model were established. As a guide of FEA calculation results, optimization design about battery pack inside and outside structure and welding method were used. The battery pack intensity, stiffness and anti-vibration safety performance...
Using sliding mode control algorithm with the exponential reaching law, in this paper, a new semi-active control strategy is presented for space grid structures installed with magnetorheological (MR) dampers. The real semi-active control force is obtained based on the computed control force and the maximum control force ofthe MR damper. A structural model of one-story space grid structure subjected...
Automotive radar sensors typically apply waveforms with a fixed bandwidth. With the new 79 GHz automotive radar band a huge bandwidth of up to 4 GHz has become available, which is an ideal basis for the application of agile waveforms. This paper discusses an approach towards a frequency and bandwidth agile automotive radar sensor that allows to trade maximum range versus resolution. Measurement results...
Visual (V) surveillance systems are extensively deployed and becoming the largest source of big data. On the other hand, electronic (E) data also plays an important role in surveillance and its amount increases explosively with the ubiquity of mobile devices. One of the major problems in surveillance is to determine human objects' identities among different surveillance scenes. Traditional way of...
In this paper, we study the purchasing strategy problem when the suppliers' reliability is uncertain. This problem is derived from the real world situation in the power metering device industry. Besides the price and product category each supplier can provide, the purchasing strategy is also influenced by other intangible impacts, i.e. wild fluctuations of suppliers' reliability and lead time can...
The power industry reform in China brings new challenges for the security and stability operation of the power system in hydro-dominated electricity markets. In this study, an integrated method is presented for verifying the feasibility and the executability of the contracted generation formed in the Power Exchange. The integrated method consists of four parts: first to forecast the inflows of large...
The performance of underwater acoustic target recognition system decreases significantly mainly due to the complex underwater acoustic conditions. Nevertheless, human auditory system is capable of segregating different targets in noisy conditions. Several auditory-based features have been applied to underwater acoustic target recognition, but only represent amplitude of the signal. However, phase...
In this research, we conduct a comprehensive measurement study on the predictability of human mobility with respect to demographic differences. We leverage an extensive WLAN dataset collected on a large university campus. Specifically, our dataset includes over 41 million WLAN entries gathered from over 5,000 students (with demographic information) during a four-month period in 2015. We observed surprising...
Specific Emitter Identification (SEI) is one of most difficult tasks in modern electronic warfare. The principle function of the SEI is utilizing fingerprint features to identify different emitters of the same type by a precise measurement, which plays an important role in the recognition process. Under the premise that the time-domain waveforms such as the instantaneous amplitude and frequency are...
The key technology to analyzing electricity data is cluster methods, of which the traditional way has already lost its agility and quality due to the increasing data volume. To this end, this paper presented an electricity data mining structure: first the higher dimensional data should be reduced to lower ones, second the reduced-dimensional results should be classified into typical usage behavior...
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