Xem 1-20 trên 26 kết quả Involves both problem
  • The problem of part-of-speech induction from text involves two aspects: Firstly, a set of word classes is to be derived automatically. Secondly, each word of a vocabulary is to be assigned to one or several of these word classes. In this paper we present a method that solves both problems with good accuracy. Our approach adopts a mixture of statistical methods that have been successfully applied in word sense induction.

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  • This chapter discusses the application of MATLAB for analysis of two-port networks. The describing equations for the various two-port network representations are given. The use of MATLAB for solving problems involving parallel, series and cascaded two-port networks is shown. Example problems involving both passive and active circuits will be solved using MATLAB. 7.1 TWO-PORT NETWORK REPRESENTATIONS A general two-port network is shown in Figure 7.1. I1 + V1 Linear two-port network I2 + V2 - Figure 7.1 General Two-Port Network I 1 and V1 are input current and voltage, respectively.

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  • CHAPTER SEVEN TWO-PORT NETWORKS This chapter discusses the application of MATLAB for analysis of two-port networks. The describing equations for the various two-port network representations are given. The use of MATLAB for solving problems involving parallel, series and cascaded two-port networks is shown. Example problems involving both passive and active circuits will be solved using MATLAB. 7.1 TWO-PORT NETWORK REPRESENTATIONS A general two-port network is shown in Figure 7.1. I1 + V1 Linear two-port network I2 + V2 - Figure 7.

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  • Recently, Th17 cells were identified as a new subset of T helper cells unrelated to Th1 or Th2 cells. They are a subset of T helper cells characterized by IL-17 production, differentiated from naïve T cells in the presence of both transforming growth factor (TGF)-β and IL-6 in mice, and are implicated in the pathogenesis of experimental allergic encephalomyelitis (EAE) and collagen-induced arthritis (CIA) (Langrish et al. 2005).

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  • Discussion of nanotechnology can quickly become complex as a full analysis involves advanced chemistry, biology, physics, computer science, and engineering. The properties of nano-scale materials are governed by laws of quantum physics, causing materials to display properties and characteristics that would be considered by the laws of classic Newtonian physics. It is these intermolecular forces which cause nanotechnology to be both a vexing research problem, and yet have enormous potential.

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  • It has become a cliché that environmental problems are substantial, and that economic growth contributes to them. A common response is stricter environmental regulation, which often inhibits growth. The result can be a trade-off between a healthy environment on the one hand and healthy growth on the other. As a consequence, opportunities for business may be constrained. However, there are some forms of development that are both environmentally and socially sustainable.

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  • In this section we define the problem we address, state our assumptions, and describe our threat model. We address the problem of designing and implement- ing malicious processors that carry out high-level at- tacks. In this paper we focus on an attacker that adds additional circuits to carry out the attack. We consider analog circuit perturbations (both timing and power), as well as discrete perturbations. We do not consider at- tacks where the gate-level design is unmodified and the attacker uses physical phenomena (e.g.

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  • Collocational knowledge is necessary for language generation. The problem is that collocations come in a large variety of forms. They can involve two, three or more words, these words can be of different syntactic categories and they can be involved in more or less rigid ways. This leads to two main difficulties: collocational knowledge has to be acquired and it must be represented flexibly so that it can be used for language generation. We address both problems in this paper, focusing on the acquisition problem. We describe a program, X t r a c t , that automatically acquires...

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  • During the Identification phase, ideas for projects and other development actions are identified and screened for further study. This involves consultation with the intended beneficiaries of each action, an analysis of the problems they face, and the identification of options to address these problems. A decision can then be made on the relevance of each project idea (both to the intended beneficiaries and to the programming framework), and on which ideas should be further studied during the Formulation phase....

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  • The purpose of this book is to provide both the student and young professional design engineer with an overall guide to the amount of work involved in the design of a manually operated automotive gearbox, and the problems that can be encountered both during the design stages and in operation.

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  • Reliable and accurate positioning and navigation is critical for a diverse set of emerging applications calling for advanced signal-processing techniques. This book provides an overview of some of the most recent research results in the field of signal processing for positioning and navigation, addressing many challenging open problems. The book stems from the European Network of Excellence in Wireless Communications NEWCOM++, in which I was privileged to be involved as both an external observer and a contributor.

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  • In this chapter, MATLAB will be used to solve problems involving metaloxide semiconductor field effect and bipolar junction transistors. The general topics to be discussed in this chapter are dc model of BJT and MOSFET, biasing of discrete and integrated circuits, and frequency response of amplifiers. 12.1 BIPOLAR JUNCTION TRANSISTORS Bipolar junction transistor (BJT) consists of two pn junctions connected backto-back. The operation of the BJT depends on the flow of both majority and minority carriers. There are two types of BJT: npn and pnp transistors.

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  • CHAPTER TWELVE TRANSISTOR CIRCUITS In this chapter, MATLAB will be used to solve problems involving metaloxide semiconductor field effect and bipolar junction transistors. The general topics to be discussed in this chapter are dc model of BJT and MOSFET, biasing of discrete and integrated circuits, and frequency response of amplifiers. 12.1 BIPOLAR JUNCTION TRANSISTORS Bipolar junction transistor (BJT) consists of two pn junctions connected backto-back. The operation of the BJT depends on the flow of both majority and minority carriers. There are two types of BJT: npn and pnp transistors.

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  • In the development of a new vehicle platform, its crashworthiness is an important concern, and it is imperative to compare the impact severity of the vehicle and occupants under various test and design conditions. Since an impact is a physical event that involves analyses of impulses and energy components, such as kinetic energy, energy absorption, and energy dissipation, the analyses require both the principle of work and energy and that of impulse and momentum.

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  • The initial reason for writing Complementary and Alternative Medicine: An Evidence- Based Approach was the need to examine research evidence and claims purported by advocates, clinicians, and researchers of complementary and alternative medicine (CAM) regarding its effectiveness. Both of us had previous experience with certain of these therapies since we had worked with American Indians who used alternative spiritual- indigenous medical approaches to health-related problems. Joseph Jacobs, a Mohawk, grew up using many of these healing practices.

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  • Saha and Celata Nanoscale Research Letters 2011, 6:344 http://www.nanoscalereslett.com/content/6/1/344 NANO REVIEW Open Access Advances in modelling of biomimetic fluid flow at different scales Sujoy Kumar Saha1* and Gian Piero Celata2 Abstract The biomimetic flow at different scales has been discussed at length. The need of looking into the biological surfaces and morphologies and both geometrical and physical similarities to imitate the technological products and processes has been emphasized.

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  • When mothers and their children are separated, mothers may not see their children again or may lose track of them. Sometimes this is due to the costs involved in arranging their visits to the prison. Other times it is because the mother rejects the relatives taking care of the children or because the mother has lost custody of the child (United Nations Office on Drugs and Crime, 2008). These mental and developmental problems tend to stay with children throughout their lives.

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  • The evaluation of infections in transplant recipients involves consideration of both the donor and the recipient of the transplanted organ. Infections following transplantation are complicated by the use of drugs that are necessary to enhance the likelihood of survival of the transplanted organ but that also cause the host to be immunocompromised. Thus, what might have been a latent or asymptomatic infection in an immunocompetent donor or in the recipient prior to therapy can become a life-threatening problem when the recipient becomes immunosuppressed.

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  • Optimization has become pervasive in medicine. The application of computing to medical applications has opened many challenging issues and problems for both the medical computing field and the mathematical community. Mathematical techniques (continuous and discrete) are playing a key role with increasing importance in understanding several fundamental problems in medicine. Naturally, optimization is a fundamentally important tool due to the limitation of the resources involved and the need for better decision making....

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  • Moreover, typically, previous work investigated en- forcing a given resource partitioning of a single re- source, within a single software tier at a time. In our own previous work in the area of dynamic parti- tioning, we have investigated either partitioning mem- ory, through a simulation-based exhaustive search ap- proach [24], or partitioning storage bandwidth, through an adaptive feedback-loop approach [23], but not both.

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