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Here we have developed a novel large-field high-resolution two-photon digital scanned light-sheet microscopy (2P3A-DSLM) based on ultrafast axial scanning of illumination focal spot with a tunable acoustic gradient (TAG) index device. This new technique provides a sub-micron axial resolution with a large field of view in deep tissues. In vivo imaging with 2P3A-DSLM resolves functional maturation of...
In the 3D integration stages, the structure of the TSV is changed with the development of the procedure. The 3D though silicon via (TSV) integration models with the new updated structure depended on the integration processes (fabricating redistribution layer (RDL), reflowing solders and filling underfill) were analytically studied in this work. The equivalent stress, von Mises stress, was used to...
Piezoelectric ceramic actuators have wide application prospects in precision positioning and measurement technology, but its hysteresis characteristics cause a lot of restrictions to their applications. To solve this problem, in this paper, the hysteresis characteristic of piezoelectric ceramics is analyzed, and the data of the experiment are collected, the piezoelectric ceramic hysteresis curves...
In this paper, the identification method of the piezoelectric ceramics model is put forward. Firstly Prandtl-lshlinskii model of hysteresis of piezoelectric ceramics is built, and basic creep superposition operator of creep model is identified on the creep features of piezoelectric ceramics. Secondly, the combination model of hysteresis and creep were got. Finally, an adaptive inverse controller is...
Piezoelectric ceramics actuator has wide application prospects in precision positioning and measurement technology, but its nonlinear characteristics cause a lot of restrictions to their applications. To solve this problem, the experimental data are collected to establish nonlinear model of piezoelectric ceramics actuators. Firstly, the input and output data are collected with LabVIEW. And then, the...
A novel Cu-ordered-reinforced polymer composite interposer and its reinforced structure have been proposed in this paper. The models have been designed and simulated by Comsol software. The simulation indicated that the reinforced structure, which has four strips extending into the polymer area, improves stiffness and thermal conductivity of the composite interposer. It is proved that the copper proportion...
The Piezoelectric Smart Materials Cantilever Beams was investigated and presented. The deformation of the cantilever caused by manipulation force is one of the most major nonlinearities and uncertainties during manipulation. It causes difficulties in precisely position measurement. In order to solve this problem, in this paper, the dynamics model of piezoelectric smart cantilever beam is researched...
In order to obtain the driving characteristics of piezoelectric actuators, in this paper, the initial position is got by Harris corner location method. Initial template matching region is obtained by criteria raster image sequence process corner matching. A modified sub-pixel image block matching method is used to measure the actual driving characteristics of piezoelectric actuators. Experimental...
Ion-exchange Polymer-Metal Composites known as a type of Electro-Active smart material has complex mechanism, and takes on nonlinear characteristic, which blocks its development and utilization. In this paper, a new model for electro-active smart actuator based on non-integer order models is proposed. An experimental setup has been realized to study the electro-active smart actuator non-integer behavior...
This paper presents a testing method for infrared radiation characteristics of the aircraft exhaust system. By using graphical programming language of virtual instrument development testing platform, infrared radiation characteristics of jet aircraft are studied. Infrared radiation can be achieved, displayed and so on. The virtual panel and block diagram are designed. The system designed mainly is...
Unit test is the first stage in the V-Model and the foundation of software test. By means of integrating Android JUnit, a testing tool, into a continuous integration platform named Jenkins, this paper proposes a fully automated unit test approach. The approach can generate a visual test report for Android projects. This achievement can significantly increase the efficiency of multiple unit tests,...
A new terrain meshing method based on the ray-tracing algorithm is presented. In the propagation model, most of the transmission paths are focused in the area that between the transmitters and receivers. The main idea is to mesh the area containing both the transmitters and receivers into fine triangles while the rest area into larger triangles. The processing time of this developed method is half...
Nitrogen doped Zn0.925Mg0.075O (ZMO) films were grown on Si substrate by pulsed laser deposition (PLD). The influence of nitrogen on the optical properties and the structure of ZMO films have been studied by photoluminescence (PL), Raman spectra and X-ray diffraction (XRD). The results indicate that the emission spectra separated obviously two light regions of an ultraviolet (UV) and a visible light...
Crops freeze injury is one of the most happened disasters when season turns. In recent years, the products of crops in china frequently suffer from freeze injury greatly and the trend is gradually increasing. The great influence of freeze injury in large areas has earned people's highly attention. Remote sensing technologies have many advantages such as being objective, macroscopic and timely, which...
Drought is one of the most happened natural hazards, which can cause the agriculture output of large areas to decrease dramatically and has been a bottleneck for sustainable development of agriculture. Recently, the drought problem in china is becoming serious and the drought resistant work is faced with huge challenge. It is critical to detect promptly and warn the drought situation accurately. With...
The paper have discussed one kind of the tactics which realizes share of distributed education resources owing to Web Server technology and carries out the distributed manages for education resources and concentrates the share searching. It has promoted the share for education resources.
As an advanced materials, nano-materials get more and more attention. This article introduces the classification, structure features, properties, synthesis process and application of nanometer material. Prospects of the development orientation and studies in this field is given.
The paper is mainly aimed at building a method to monitor tool wear condition based on analysis of chaotic characteristics of acoustic emission (AE) signal generated during tool cutting process. First, according to the AE signals from different tool cutting periods, multiple chaos descriptions, such as reconstructing the strange attractor track and Poincare map, computing correlation dimension and...
Satellite formation flying position-keeping control is researched. A simulation method based on STK and Matlab for the satellites formation position-keeping control is introduced. Relative dynamical models of formation flying were derived, and Hill equations were deduced based on the circular reference orbit. Linear-quadratic regulator was adopted to perform the formation flying position-keeping control...
The deformation of the cantilever caused by manipulation force is one of the most major nonlinearities and uncertainties during manipulation. It causes difficulties in precisely controlling the tip position, which will cause the tip to miss the position of the object. In order to solve this problem, in this paper, the dynamics model of piezoelectric smart cantilever beam based on ionic polymer metal...
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