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Thermal stresses in TSV structures have been measured using micro-Raman spectroscopy and precision wafer curvature technique as a function of temperature and during thermal cycling. The results were verified by finite element analysis (FEA) to characterize the thermomechanical behavior of the TSV structures. An initial nonlinear curvature behavior was observed and was attributed to grain growth, which...
The practical teaching is the key to cultivating engineering talents. Based on the analysis of practical teaching, this paper shows some measures to construct practical teaching system: building three-dimensional practical teaching contents, strengthening faculty of the practical teaching, innovating management system of practical teaching and carrying out industry-university-institute cooperation...
By setting the classification of the model properties in 3D games and using the Axis-Aligned Bounding Boxes (AABB) algorithm and Oriented Bounding Boxes (OBB) algorithm, the collision detection algorithms of the game roles in scenario are optimized and the complexity of the detection is reduced.
Thermal stresses in TSV structures have been measured using micro-Raman spectroscopy and precision wafer curvature technique as a function of temperature and during thermal cycling. The results were verified by finite element analysis (FEA) to characterize the thermal stress behavior of the TSV structures. A nonlinear stress relaxation was observed during initial heating and no preferred grain orientation...
In this work, experimental measurements and numerical analysis of the thermal stresses in TSV structures are presented. The stresses are measured using the micro-Raman spectroscopy and the precision bending beam technique. Together, the two methods provide a complementary approach for characterizing thermomechanical behaviors of the TSV structures. The effect of plasticity on the stresses is discussed,...
A semi-supervised band selection based on self-training and graph laplacian is proposed for the classification of hyperspectral data when small-sized labeled samples presented. In the method, a feature ranking criterion using both labeled and unlabeled samples is first defined to select the initial feature subset. Next, the self-training scheme is used to expand the unlabeled samples into the labeled...
Heterogeneous semantic models have been introduced to represent knowledge of interpreting the semantics of Web information, as well as semantic information on the Web. In this paper, the current semantic representation models are introduced firstly. After comparative analysis of the advantages and disadvantages between those models, this paper illustrated the deficiencies among those models. Then...
This paper describes the finite element simulation for diffusion controlled intermetallic formation of Au/Al interface during the wire bonding process. The analogous correlation between the intermetallic atomic diffusion and the heat transport is introduced, and the simulation of intermetallic diffusion using a commercial finite element method (FEM) tool ANSYS is demonstrated. Phase dependent diffusivities...
The beampattern of the traditional MVDR beamformer for MIMO radar always has unacceptably high sidelobe levels, especially when the transmit antennas are located more than a half wavelength apart from each other. To overcome this shortcoming, we proposed a new adaptive beamforming algorithm with sidelobe control for MIMO radar. Our method minimizes the power of interferences and noise, while maintaining...
Quality of service (QoS) is an important issue in the deployment IEEE 802.16 networks with real-time and non-real-time traffic integration. IEEE 802.16j is an extension of IEEE 802.16 to support relay transmission. In this paper, we propose a dynamic hybrid distributed scheduling mechanism (DHSM) for IEEE 802.16j networks with non-transparent relay stations. First, we define a suitable priority for...
To deal with the drifting issue in visual tracking, we propose an Online Transfer Boosting (OTB) algorithm that transfers knowledge from three different source domains to the target domain to improve the performance of the online classifier used in tracking-by-detection. In particular, the OTB algorithm integrates three types of knowledge by: (1) transferring prior knowledge from the first frame using...
A parallel hybrid simulation model of active power filter is established by using MATLAB/Simulink tool, and simulated parameter settings and simulation analysis of each link of the system are done in this paper. The results of the simulation proved that the hybrid active filter can suppress harmonics well and compensate reactive power of the power system, which has verified the feasibility and effectiveness...
Three-dimensional (3-D) integration with through-silicon vias (TSVs) has emerged as an effective solution to overcome the wiring limit imposed on device density and performance. However, thermal stresses induced in the TSV structures can affect the device performance by degrading carrier mobility and raise serious reliability concerns. In this paper, the effect of thermal stresses in TSV structures...
With the wireless communications technology in data security development, it increases the requirements for security and confidentiality, using the security management strategy and security technology faces new challenges. The use of encryption software for wireless communication has become the bottleneck of secure communication system. It is difficult to implement that Commercial MCU to complete...
Hybrid energy systems with renewable generation are built in many remote areas where the renewable resources are abundant and the environment is clean. We present a case study of the Catalina Island in California for which a system with photovoltaic (PV) arrays, wind turbines, and battery storage is designed based on empirical weather and load data. To determine the system size, we formulate an optimization...
Intensity-based image segmentation is often plagued by the spatial intensity inhomogeneities (or non-uniformities) that are caused by the imperfection of the imaging devices and the varying operating conditions, also known as the bias field. We present a graphical model representation of the joint segmentation and bias field estimation problem and propose an iterative solver based on the Belief Propagation...
Local Binary Pattern (LBP) and Texton are both widely used texture analysis techniques. In this paper we propose a patch-based texture classification method that takes advantage of both LBP and Texton. Unlike the traditional LBP methods that describe a texture with the occurrence of local binary patterns in the entire image, we compute the LBP histogram in a small region around each pixel to capture...
We present a shape-from-shading algorithm for Lambertian surfaces of uniform but unknown albedo, illuminated by unknown, arbitrarily complex environment lighting. Our approach is based on a first order spherical harmonic approximation to the reflectance map. This is estimated from the image using surface normals interpolated from boundary points. The shape-from-shading step minimises local brightness...
This paper, taking Beijing, Tianjin, Shanghai of China for example, discussed the method of urban carbon emissions prediction. Using Yongbin Zhu and Zheng Wang's optimal growth model to study the energy carbon emissions of cities under steady economic growth, and getting forest carbon sinks of cities with CO2FIX model, then we could result in net carbon emissions of cities. The results showed that...
This paper employed the carbon dynamic model and IPCC cement model to estimate the amount of carbon emitted by energy and cement, and used CO2FIX model to predict the forest carbon sinks in Beijing, Tianjin and Hebei Province from 2009 to 2050, then, this paper analyzed the influential factors and the contribution of forest carbon sinks to carbon emissions reduction. The main conclusions are as follows:...
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