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Structural and functional neuroimaging studies have indicated that the cortico-striato -thalamo-cortical (CSTC) circuit contributes to the pathophysiology of obsessive compulsive disorder (OCD). As an essential component of CSTC circuit, the dorsal anterior cingulate cortex (dACC) plays an important role for its advanced function in cognition and emotion control. A comprehensive understanding of the...
The coupling between neuronal activity and cerebral blood flow(CBF), known as neurovascular coupling, serves as the basis of functional brain imaging. Optogenetics provides a precise and selective approach to manipulate the activity in cell-specific neurons. It has been used in neuroscience research for comprehensive understanding about the light-evoked neurovascular coupling in rodent neuronal circuits...
Major depressive disorder (MDD) is associated with excessive self-focus and a tendency to engage in self-reflection. Women are more inclined to form negative thoughts when facing problems such as social rejection. The neuroimaging studies addressing MDD females are still rare. The medial prefrontal cortex, a central node of anterior default mode network (DMN), plays an important role in the pathophysiology...
This paper presents an improved phased array antenna which is based on the Vivaldi antenna. This phased array antenna has good UWB (ultra-wide bandwidth) characteristics. Meanwhile, its scanning angle has reached to 60 degrees. The length of each radiation unit has been optimized under the application of the low sidelobe algorithm, for the purpose of weakening the sidelobe. By the one-dimensional...
Women are at a twofold higher risk of developing major depressive disorder (MDD) than that of men. However, the investigation of female MDD patients functional brain activity is rare and the detailed mechanism remains unclear. The present work is to explore the altered spontaneous neural activity measured with regional homogeneity (ReHo) in female MDD patients using resting-state functional magnetic...
With the development of VLBI technology, the correlator system of observation station is constantly upgrading, so as to adapt to new data format and higher processing speed. Now the conversion of data format from Mark 5B to VDIF has been built by the researchers around the world. Once completed, it will be conducive to VLBI international collaboration. Hence it is very meaningful to study the VDIF...
As the development of people's pursuit for driving experience, atmosphere lamp is increasingly used in automobile interior lighting. How to accurately control and change the color of atmosphere light becomes an urgent problem. In addition, any electronic system applying in automobile must go through strict ESD test to make sure that system can work stably in the real environment. In this paper, a...
Transient electromagnetic (EM) scattering by conducting-dielectric objects is formulated by time-domain electric field integral equations (TDEFIEs). The TDEFIEs are usually solved by combining the method of moments (MoM) in space domain and march-on-in-time (MoT) scheme in time domain. The space-domain MoM requires two basis functions to represent the electric and magnetic current densities on material...
Intelligent patrol based on aircraft can avoid the inconvenience of traditional manual inspection and has become a new inspection method for transmission lines. In order to eliminate the influence of illumination on the inspection images and improve the accuracy of fault identification, various enhancement algorithms are tested and compared and a proper enhancement algorithm is proposed for transmission...
This paper firstly designs a set of tunnel safety pre-warning scheme. According to the detection convergence value and sedimentation value of tunnel section, we judge the safety of the tunnel. Tunnel safety pre-warning scheme can be divided into three broad categories: security, warning and risk. Then, a visualized system for monitoring tunnel's risk is followed with the tunnel safety pre-warning...
In this paper a dipole-type RFID tag antenna is proposed and it can be used to detect the mechanical deformation of an object. When the tag antenna is attached to an object, the mechanical deformation of the object and the patch antenna will contribute to the frequency deviation. So we can research and test the impact of mechanical deformation of the RFID tag antenna on its resonant frequency to monitor...
Electromagnetic problems with both conducting and dielectric media are formulated through volume-surface integral equations (VSIEs) in integral equation approach. The conducting part is described by surface integral equation while the dielectric part is governed by volume integral equations (VIEs) and they are coupled together by produced fields. The VSIEs are usually solved by the method of moments...
Solving electromagnetic (EM) scattering with very thin conducting objects by integral equation approach have to deal with some unfavorable problems, such as a large dynamic change of current density in the neighborhood of their edges and many low-quality meshes on the side faces of objects in geometric discretization, which makes the accurate evaluation of singular integrals in matrix elements significant...
Volume Integral Equations (VIEs) are indispensable for electromagnetic (EM) analysis by integral equation approach when inhomogeneous penetrable objects are involved. In the conventional method of moment (MoM) for solving the VIEs, unknown functions are expanded by a well-designed basis function like Schaubert-Wilton-Glisson (SWG) basis function, and a tedious testing procedure is required to transform...
The fast multipole algorithm (FMA) has been thought of as one of top ten algorithms in science and engineering in the 20th century and its multilevel variant (MLFMA) was first proposed in electromagnetics. The memory usage and CPU time for solving a dense matrix equation iteratively are of O(N2) complexity, where N is the number of unknowns, and this cost usually prevents one from solving large-scale...
Transient electromagnetic scattering by dielectric objects is formulated through time-domain Poggio-Miller-Chang-Harrington-Wu-Tsai (TDPMCHWT) equations which are usually solved by combining the method of moments (MoM) in space domain and march-on-in-time (MoT) scheme in time domain. The space-domain MoM requires two basis functions to represent the electric and magnetic current densities, respectively,...
In this paper, a novel low-profile RFID antenna is proposed. Based on original microstrip patch antenna, the tag antenna adopts a shorted stub and H-shape slot. Implementing a shorted stub can easily match the impedance of RFID chip. Using H-shape slot increases the length of current path on patch, miniaturizing the tag antenna. The size of the proposed antenna is 62 × 18 × 0.79mm3 and its simple...
RFID has been widely used around the world and it is necessary and effective to lower the cost of RFID by removing inside chip. A novel frequency-coded chipless RFID tag is presented in this paper. It encodes data into the spectral characteristic by spiral resonators with different structures. The tag with six resonators can produce totally 64 IDs and each tag has its unique ID decided by unique size...
Metallic dampers in the bridge structures will suffer from a certain degree of deformation leading to a damage or destruction. To assess the deformation of metallic dampers and to decide whether to replace, a passive wireless strain sensor is needed. In this paper, we propose a scheme to design the passive wireless strain measurement system. We first investigate the possibility that a folded patch...
With the rapid development of intelligent monitoring today, we have applied numerous sensors in monitoring the target area, but the problem of energy consumption has always been difficult to solve. Because of the large number of wireless sensor network node, the supplement of node energy trapped, so it's imperative for us to consider the design of low-power system. In this paper, we used the PSoC4...
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