Tag Archives: High-Frequency

Practice Makes Perfect: Complete French Grammar

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Practice Makes Perfect: Complete French Grammar (Practice Makes Perfect Series) by Annie Heminway
English | Oct 9, 2007 | ISBN: 0071482849 | 288 Pages | PDF | 17 MB
Polish your French grammar skills and communicate with more savoir-faire

Practice Makes Perfect: Complete French Grammar
The only way to build your confidence in a second language is to practice, practice, practice. From present tense of regular verbs to direct object pronouns, this comprehensive guide and workbook covers all aspects of French grammar that you need to master.

Focusing on the practical aspects of French as it's really spoken, each unit of Practice Makes Perfect: Complete French Grammar features clear explanations, numerous realistic examples, and dozens of engaging exercises.

Practice Makes Perfect: Complete French Grammar makes mastering grammar easy with:

Clear, down-to-earth, easy-to-follow explanations that make even the most complex principles easy to understand
Example sentences that illustrate and clarify each grammatical point
Dozens of exercises in formats suited to every learning style
Practical and high-frequency vocabulary used throughout
A detailed answer key for quick, easy progress checks
With help from this book, you can effortlessly use:
* Verbs ending in -oir * Infinitives * Relative pronouns * Gerunds * Pronominal verbs * Passe Compose * Expressions of time * Passive voice
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4000 Essential English Words Volumes 1-6 Pack

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4000 Essential English Words Volumes 1-6 Pack
English | MP3 64Kbps | Audiobook Collection | All in One | 957 MB
Genre: Audiobook
4000 Essential English Words is a six-book series that is designed to focus on practical high-frequency words to enhance the vocabulary of learners from high beginning to advance levels. The series presents a variety of words that cover a large percentage of the words that can be found in many spoken or written texts. Thus, after mastering these target words, learners will be able to fully understand vocabulary items when they encounter them in written and spoken form.

4000 Essential English Words Volumes 1-6 Pack
Each unit presents 20 words which are defined and used in sample sentences. The activities in the books are designed to present the words in different uses so that learners can fully see how they can be utilized. Also at the end of each unit there is a story whch contains the unit's target words to give learners further examples of the words in use. Each level properly prepares the learner for the next which progressively challenges the learner with more sophisticated vocabulary and stories.

Key Features

(1) Clear, easy to understand definitions and examples

(2) Various activities to reinforce target vocabulary

(3) Progressive development of vocabulary across levels

(4) Original stories which utilize target words

(5) Useful color images that illustrate each target word

(6) Free downloadable supplemental audio recordings of target word lists and stories to aid in listening and pronunciation

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Semi-Classical Analysis For Nonlinear Schrodinger Equations

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Remi Carles, "Semi-Classical Analysis For Nonlinear Schrodinger Equations"
English | 2008 | ISBN: 9812793127 | 256 pages | PDF | 3 MB

Semi-Classical Analysis For Nonlinear Schrodinger Equations
These lecture notes review recent results on the high-frequency analysis of nonlinear Schredinger equations in the presence of an external potential. The book consists of two relatively independent parts: WKB analysis, and caustic crossing. In the first part, the basic linear WKB theory is constructed and then extended to the nonlinear framework. The most difficult supercritical case is discussed in detail, together with some of its consequences concerning instability phenomena. Applications of WKB analysis to functional analysis, in particular to the Cauchy problem for nonlinear Schredinger equations, are also given. In the second part, caustic crossing is described, especially when the caustic is reduced to a point, and the link with nonlinear scattering operators is investigated.
These notes are self-contained and combine selected articles written by the author over the past ten years in a coherent manner, with some simplified proofs. Examples and figures are provided to support the intuition, and comparisons with other equations such as the nonlinear wave equation are provided.
Contents: WKB Analysis: Preliminary Analysis; Weak Nonlinear Geometric Optics; Convergence of Quadratic Observables via Modulated Energy Functionals; Pointwise Description of the Wave Function; Some Instability Phenomena; Caustic Crossing: The Case of Focal Points: Caustic Crossing: Formal Analysis; Focal Point without External Potential; Focal Point in the Presence of an External Potential; Some Ideas for Supercritical Cases.
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Econometrics of Financial High-Frequency Data

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Econometrics of Financial High-Frequency Data
by Nikolaus Hautsch
English | 2011 | ISBN: 3642219241 | 386 pages | PDF | 5.46 MB

The availability of financial data recorded on high-frequency level has inspired a research area which over the last decade emerged to a major area in econometrics and statistics. The growing popularity of high-frequency econometrics is driven by technological progress in trading systems and an increasing importance of intraday trading, liquidity risk, optimal order placement as well as high-frequency volatility.

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