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Electronic devices and solder joints inside the devices are always exposed to thermal loads, which would change the microstructure of solder joints. It is well known that the growth of the intermetallic compound between bulk solder and substrate and the change of the structure in bulk solder itself might lead to fatigue crack of solder joints. The objective of this study is to demonstrate the change...
The advent of the big data era, the rapid development of mobile internet, and the rising demand of cloud computing services require increasingly more compute capability from their data center. This compute increase will most likely come from higher rack and room power densities or even construction of new Internet data centers. But an increase in a data center's business-critical IT equipment (servers,...
Work on sentiment analysis has thus far been limited in the news article domain. This has mainly been caused by 1) news articles lacking a clearly defined target, 2) the difficulty in separating good and bad news from positive and negative sentiment, and 3) the seeming necessity of, and complexity in, relying on domain-specific interpretations and background knowledge. In this paper we propose, define,...
This paper presents a methodology based on game theory for power system static reserve planning with large-scale integration of wind power to ensure the generating capacity adequacy. First, a min–max game model is proposed for decision-making problems with uncertainties. Then, it is applied to the static reserve capacity planning problem. In the proposed model, the system planner (as one player) aims...
Aiming at the limitation that the interruption event recordings are simply used to calculate the reliability indexes in the reliability management of distribution network at present, this paper proposes a practical method of reliability weak links mining for distribution network based on multidimensional analysis. Firstly, a complete multidimensional cube model of interruption recording is built according...
With the development of the economy and people's life, the ice and snow tourism has been developing rapidly, and the development of ice and snow tourism industry has attracted more and more attention. Thus, the evaluation of ice and snow tourism resource value becomes an important issue in ice and snow tourism research. This paper, from economic, ecological and cultural aspects, designs an ice and...
With the development of the equipment, general quality characteristics (GQCs) are getting more and more important. This paper mainly focuses on the procedure and several methods for identification of GQCs.
Developed a control channel transmit diversity method and wireless communication network that control signaling can be transmitting by high reliability and wide coverage, the control channel is used different transmission frequency and time interval as well as the control and data is used uniform encoding and incremental redundancy code during the transmission timing interval (TTI) through joint use...
The effect evaluation of chemical emergency response plans before implementation is an important research topic. Most researchers focus on the evaluation of chemical objective process and ignore the impact of human behaviors on the emergency response process. In order to study the uncertainties of human behaviors, a dynamic evaluation method of emergency response plans based on ACP (Artificial system,...
Though a variety of cloud storage services have been offered recently, they have not yet provided users with transparent and cost-effective personal data storage. Services like Google Docs offer easy file access and sharing, but tie storage with internal data formats and specific applications. Meanwhile, services like Drop box offer general-purpose storage. Yet they have not been widely utilized,...
This paper presents the effect of the reflow oven type to the intermetallic (IMC) formation and solders joint reliability for the wafer level packages (WLPs). Two common used reflow oven in electronic manufacturing industry which are conduction and convection oven have been studied. Four reflow profiles with same peak temperature and wetting time for both ovens were developed. In this study, two low...
2nd level reliability performance during drop impact is critical for Wafer Level Packages (WLP). Accompanying the popularization of portable and mobile phone products, high reliability under board level drop test is a great concern to semiconductor manufacturers. A 0.4mm pitch Cu under bump metallization (UBM) type has been developed for mobile computing application. In this paper presents the impact...
Parallelism has often been used to improve the reliability and efficiency of a variety of different engineering systems. In this paper, we quantify the efficiency of parallelism in systems that are prone to failures and exhibit power law processing durations. We focus on the context of transmitting a data unit in communication networks, where parallelism can be achieved by multipath transmission (e...
The past decade has witnessed a rapid development of the international construction market. This research aims to investigate top Chinese contractors' surplus distribution created by Value Engineering (VE). During the past few decades, VE approach has been widely used in the area of construction, which focuses on the lowest lifecycle cost consistent with performance, quality and reliability. Only...
The conventional security mechanism based on cryptography and authentication is not sufficient for countering all types of security problems resulting from internal malicious nodes and wrong act resulting from hardware breakdown and resources loss. The construction of a reputation based trustworthy sensor networks has recently become a hot point of making up for the shortcoming of conventional security...
Reserve service payment is a major problem in the initial period of the de-regulated electricity market for the system reliability in China. The reserve costs of various reserve suppliers are analyzed, and especially the opportunity cost calculation formulas and the relationships with the energy cost are studied. Based on the situation of the electricity market in China, the paper researches into...
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