Natural frequencies

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  • Scientists predict the earth is facing 40-to-60 years of climate change, even if emissions of carbon dioxide and other global warming gases stopped today. One inevitable consequence of the greenhouse gases already in the atmosphere will be an increase in the frequency and severity of natural disaster events. Global Warming, Natural Hazards, and Emergency Management documents the imperative need for communities to prepare for the coming effects of climate change and provides a series of in-depth, road-tested recommendations on how to reduce risks for communities and businesses.

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  • Normally the frequency divider designed by Boole algebra and to design a frequency divider with any divide factor, we have to repeat all over again every design step as the same. So to avoid of wasting time and money, instead of using traditional Boole algebra in digital technical we replace it by mathematical models in high algebra. And because of that we can design frequency dividers use computer. 1. Modeling of function circuit

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  • This paper presents the results of a series of experiments which examine the impact of two information status categories (given and new) and frequency of occurrence on pitch accent realisations. More specifically the experiments explore within-type similarity of pitch accent productions and the effect information status and frequency of occurrence have on these productions. The results indicate a significant influence of both pitch accent type and information status category on the degree of withintype variability, in line with exemplartheoretic expectations. ...

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  • We propose a novel method to automatically acquire a term-frequency-based taxonomy from a corpus using an unsupervised method. A term-frequency-based taxonomy is useful for application domains where the frequency with which terms occur on their own and in combination with other terms imposes a natural term hierarchy. We highlight an application for our approach and demonstrate its effectiveness and robustness in extracting knowledge from real-world data.

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  • Cognitive theories of dialogue hold that entrainment, the automatic alignment between dialogue partners at many levels of linguistic representation, is key to facilitating both production and comprehension in dialogue. In this paper we examine novel types of entrainment in two corpora—Switchboard and the Columbia Games corpus. We examine entrainment in use of high-frequency words (the most common words in the corpus), and its association with dialogue naturalness and flow, as well as with task success. ...

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  • This paper describes a novel approach for the automatic generation and evaluation of a trivial dialogue phrases database. A trivial dialogue phrase is defined as an expression used by a chatbot program as the answer of a user input. A transfer-like genetic algorithm (GA) method is used to generating the trivial dialogue phrases for the creation of a natural language generation (NLG) knowledge base. The automatic evaluation of a generated phrase is performed by producing n-grams and retrieving their frequencies from the World Wide Web (WWW).

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  • In 1877 the Italian astronomer Giovanni Schiaparelli (1835-1910) observed some markings on the planet Mars which he referred to as canali. This was mistranslated into English as canals, suggesting man-made structures and the existence of intelligent life on Mars, instead of channels, which occur naturally. The idea of canals appealed to the imaginations of scientists and novelists alike. The astronomer Percival Lowell used it as the basis for his 'scientific observations', recorded in such works as Mars and its Canals (1908). The novelist H.G.

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  • 1. Các khái niệm cần lưu ý: 1.1. Khối lượng, m: Theo định luật Newton, lực F = m x a. Khối lượng m º F Û gia tốc a = 1 m/s2. 1.2. Bậc tự do, DOF: Có hai loại sau: MDOF, hệ nhiều bậc tự do; SDOF, hệ một bậc tự do. 1.3. Tần số dao động tự nhiên và mode dao động tự nhiên (Natural Frequency, dao động mà công trình có được do trọng lượng bản thân của nó, không có sự tác động của tải trọng ngoài)

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  • Trong phần này ta sẽ xem xét hai khái niệm của hai thông số hệ thống bậc 2 được dùng để miêu tả đường đặc tính đáp ứng thời gian. Đó là tần số tự do (natural frequency) và hệ số tắt dần (damping ratio). - Tần số tự do (Natural Frequency, ωn): là tần số của dao đông trong hệ thống mà không có sự tắt dần.

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  • Learning how to write a coherent, effective text is a difficult and protracted achievement of cognitive development that contrasts sharply with the acquisition of speech. By the age of 5, spoken language is normally highly developed with a working vocabulary of several thousand words and an ability to comprehend and produce grammatical sentences. Although the specific contribution of a genetic predisposition for language learning is unsettled, it is apparent that speech acquisition is a natural part of early human development.

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  • Due to the success of the first edition of The Engineering Handbook published in 1995 I am pleased to provide the second edition ten years later fully updated and expanded. Purpose The purpose of The Engineering Handbook, Second Edition is to provide in a single volume a ready reference for the practicing engineer in industry, government, and academia. The book in its comprehensive format is divided into 30 sections which encompass the field of engineering and includes 19 brand new chapters and 131 fully updated contributions.

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  • Tham khảo sách 'the engineering the handbook - second edition ii (end)', khoa học tự nhiên, hoá học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The DOE’s Carbon Sequestration Program also supports global initiatives, such as the Carbon Sequestration Leadership Forum (CSLF), an international climate change initiative that focuses on the development of technologies to cost-effectively capture and sequester CO2, and the International Energy Agency (IEA). The Carbon Sequestration Program is also providing technical and financial support to international projects through the Core R&D MVA Program. Projects include the Weyburn Project (see Section 3.

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  • In any structure or assembly, certain whole-body motions and certain deformations are more common than others; the most likely (easiest to excite) motions will occur at certain natural frequencies. Certain exciting or forcing frequencies may coincide with the natural frequencies (resonance) and give relatively severe vibration responses. We will now discuss the much-simplified system shown in Fig.

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  • We study the ac-conductivity in linear response theory in the general framework of ergodic magnetic Schr¨dinger operators. For the Anderson model, o if the Fermi energy lies in the localization regime, we prove that the ac1 conductivity is bounded from above by Cν 2 (log ν )d+2 at small frequencies ν. This is to be compared to Mott’s formula, which predicts the leading term to 1 be Cν 2 (log ν )d+1 .

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  • In this paper, we study the growth of sX(L), the number of simple closed geodesics of length ≤ L on a complete hyperbolic surface X of finite area. We also study the frequencies of different types of simple closed geodesics on X and their relationship with the Weil-Petersson volumes of moduli spaces of bordered Riemann surfaces.

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  • Ross students have a student records file which is stored electronically with secured access. This file contains admissions material, test scores, unofficial copies of academic records, memoranda, correspondence, and notes which academic advisors have made about their conversations with a student. Information of a sensitive nature may be removed from the academic advising file at the discretion of the School Registrar or at the request of the student and placed into a confidential file.

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  • Later, in oder to get a set of parameters represents the time window of brain signals that the process feature extraction is done, because the major changes in brain activity related changes in the amplitude of frequency energy band spectrograms based on FFT is used to vectors have been the original features of the six components (Obermaier et al, 2001) (Proakis & Manolakis, , 1997).

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  • A descriptive analysis by frequency counting, central trends measures and dispersion was made for those continuous type variables, as some of the variables inherent to laborers, and environmental and biological measurements. Continuous variables were transformed to normalize them. We also explored possible relationships between some variables and they were crossed by constructing contingency tables. We used the Student's t tests and chi square tests for the comparison of quantitative and categorical variables.

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  • The Earth environment derives from a unique combination of factors favouring the development of various landscapes and life forms. The activity of the meteorological, geophysical or hydrological factors is characterized by variations of different amplitudes and frequencies that can provoke severe disequilibrium to a given ecosystem. Disasters can arise anywhere at the crossroads between natural hazards and human society, as a combined result of the strength of extreme events and a fragile, unprepared community....

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