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The heat generated by self-propagating exothermic reaction can be used to melt solder and then join the components. However, the microstructure of self-propagating interconnects is different from those obtained through traditional soldering process for its unique thermal conditions. In this paper, a finite element model was established to simulate the temperature field of self-propagating joints at...
Al/Ni self-propagating nanofoil can be used as a localized and rapid heat source to melt solder and achieve material connection. In this paper, air natural convection, thermal insulation and contacting heat transfer of the bonding process were considered separately to analyze the maximum fusion zone size of Sn solder by FEA model. The simulation works analyzed the temperature field and temperature...
This paper proposes a novel modular design concept for package physical design, and a modularized and parameterized modeling technique for package model library creation. The proposed modular design reduces the physical design/review cycle by ~50% and can significantly improve the performance consistency. The modularized modeling technique requires the breakdown of the full package model into vertical...
In this paper, the joint design of power allocation and mapping strategy is developed to maximize the achievable uplink rate for MIMO two-way relay channels (TWRCs) with finite-alphabet inputs. In contrast with the traditional water-filing scheme based on Gaussian inputs, the optimal power allocation for constellation constrained MIMO TWRCs does not only depend on the channel gain, but also on the...
Various wireless networks have made the ambient radio frequency signals around the world. Wireless information and power transfer (WIPT) enables the devices to recycle energy from these ambient radio frequency signals and process information simultaneously. In this paper, we develop a WIPT protocol in two-way amplify-and-forward relaying channels, where two sources exchange information via an energy...
In previous work, we have developed a cost-effective small-animal SPECT imaging system by adding a multi-pinhole cylinder collimator into an animal PET scanner. To achieve high-quality reconstructed SPECT image, accurate geometrical calibration of the collimator is critical. The pinhole position in PET-scanner's coordinate system (PSC) could be factorized into two parts: pinhole position in collimator's...
Since 3D-TSV technology has been more and more popular aiming at the demand of lightweight and multi-functions of electronic devices in recent years, the μ-C4 bumps with smaller size which interconnect the stacked die will suffer more serious operating stress, and even one of the thousands bumps fails, the device will fail. Hence, it is meaningful to study the reliability of smaller size and higher...
Since 3D-TSV technology has been more and more popular aiming at the demand of lightweight and multi-functions of electronic devices in recent years, the μ-C4 bumps with smaller size which interconnect the stacked die will suffer more serious operating stress, and even one of the thousands bumps fails, the device will fail. Hence, it is meaningful to study the reliability of smaller size and higher...
We study the morphologies, material properties, and optical characteristics of an InGaN/GaN QW light-emitting diode (LED) structure grown on a <1–10>-oriented one-dimensional trench-patterned Si (110) substrate with other samples of different trench orientations on Si (110) substrate, flat Si (110) substrate, and Si (111) substrate are demonstrated. By comparing the performances of the fabricated...
We consider the problem in which N heterogeneous uncertain linear systems aim at tracking a reference signal generated by a given exosystem under the restriction that not all the systems are directly connected to the exosystem. To tackle this problem, the reference signal is reconstructed via local interaction of the systems among themselves and the exosystem in accordance with the given communication...
Based on the study of characteristic of strata and tectonic of Zhongkouzi basin, one of the basins in Beishan basin group, the hydrogeological division has been discussed, as well as the recharge, the runoff and the discharge of groundwater in our study in this area. By analyzing the characteristics both of nature water chemistry and isotopic hydrogeochemistry, the hydrogeology properties have been...
An intensive work has been done for designing efficient algorithms for combining a series of Web services. However, existing solutions for Web services composition fail to present a specific method which can guide us to compose multiple services step by step. In this paper, we propose an efficient approach to address this issue. We employ Temporal Logic of Actions (TLA) to describe the behavior of...
This paper introduces the concept of temporal logic of actions (short for TLA), with which we can formally specify the behavior of a service, and compose Web services. The approach is demonstrated by an example. A services composition algorithm is presented.
The formation of Mn-nanostructures on the Si(100)-(2×1) surface has been studied with scanning tunneling microscopy as a function of Mn-coverage. The room temperature deposition leads to the preferential formation of monoatomic Mn-wires at coverages below 0.3ML. Isolated adatoms and ultrasmall clusters begin to appear at higher coverage and compete with the wire growth. The Mn-wires are always oriented...
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