827 research outputs found
BlogForever D2.6: Data Extraction Methodology
This report outlines an inquiry into the area of web data extraction, conducted within the context of blog preservation. The report reviews theoretical advances and practical developments for implementing data extraction. The inquiry is extended through an experiment that demonstrates the effectiveness and feasibility of implementing some of the suggested approaches. More specifically, the report discusses an approach based on unsupervised machine learning that employs the RSS feeds and HTML representations of blogs. It outlines the possibilities of extracting semantics available in blogs and demonstrates the benefits of exploiting available standards such as microformats and microdata. The report proceeds to propose a methodology for extracting and processing blog data to further inform the design and development of the BlogForever platform
Comment on The Evidence for a Pentaquark and Kinematic Reflections
The Regge exchange model used by Dzierba et al. is shown to be questionable,
since the pion pole term is not allowed. Hence the Regge amplitudes in their
calculation are exaggerated. The amount of kinematic reflection in the mass
spectrum of the (nK+) system, which is one decay channel of a possible
pentaquark, is not well justified in the fitting procedure used by Dzierba et
al., as shown by comparison with the (K+K-) invariant mass spectrum, which is
one decay channel of the a_2 and f_2 tensor mesons. While kinematic reflections
are still a concern in some papers that have presented evidence for the
pentaquark, better quantitative calculations are needed to demonstrate the
significance of this effect.Comment: Comment submitted to Phys. Rev. D (no figures
Energy densities in quantum mechanics
Quantum mechanics does not provide any ready recipe for defining energy
density in space, since the energy and coordinate do not commute. To find a
well-motivated energy density, we start from a possibly fundamental,
relativistic description for a spin- particle: Dirac's equation.
Employing its energy-momentum tensor and going to the non-relativistic limit we
find a locally conserved non-relativistic energy density that is defined via
the Terletsky-Margenau-Hill quasiprobability (which is hence selected among
other options). It coincides with the weak value of energy, and also with the
hydrodynamic energy in the Madelung representation of quantum dynamics, which
includes the quantum potential. Moreover, we find a new form of spin-related
energy that is finite in the non-relativistic limit, emerges from the rest
energy, and is (separately) locally conserved, though it does not contribute to
the global energy budget. This form of energy has a holographic character,
i.e., its value for a given volume is expressed via the surface of this volume.
Our results apply to situations where local energy representation is essential;
e.g. we show that the energy transfer velocity for a large class of free
wave-packets (including Gaussian and Airy wave-packets) is larger than its
group (i.e. coordinate-transfer) velocity.Comment: 9+6 pages, 3 figur
РЕАКЦИЯ ПРОМЫШЛЕННЫХ КОМПАНИЙ НА КРИЗИС: ИЗМЕНЕНИЕ БИЗНЕС-МОДЕЛИ И СТРАТЕГИЧЕСКАЯ УСТОЙЧИВОСТЬ
Nowadays the changes in the geopolitical situation significantly affect the conditions for doing business in Russia. The article reviews the peculiarities of the development of Russian industrial companies and the subsidiaries of foreign companies, operating in Russia, in difficult economic conditions. The contemporary consequences of global financial crisis of 2008 with respect to the industrial sector of the economy are also reviewed. The author performed an empirical study of the question of whether the companies' sustainable survival in 2014–2016 was affected by the change in the business model and whether these changes were caused by the experience of the previous crisis. The study considered the differences in the behavior of foreign and Russian companies, and the strategies, that reduce the risk of default, are defined.В настоящее время на условия ведения бизнеса в России существенно влияют изменения в геополитической ситуации. В статье исследуются особенности развития российских промышленных компаний и дочерних предприятий иностранных компаний, ведущих деятельность в России, в сложных экономических условиях. Также изучены современные последствия глобального финансового кризиса 2008 года в отношении промышленного сектора экономики. Проведено эмпирическое исследование вопроса о том, повлияло ли на устойчивое выживание компаний в 2014–2016 гг. изменение бизнес-модели и были ли данные изменения вызваны опытом предыдущего кризиса. Также рассмотрены различия в поведении российских компаний и компаний с участием иностранного капитала, определены стратегии, сокращающие риск дефолта
An improved neurogenetic model for recognition of 3D kinetic data of human extracted from the Vicon Robot system
في هذه الأيام ، انه من الضروري التمييز بين نوع السلوك البشري ، تلعب تقنيات الذكاء الاصطناعي دورًا كبيرًا في ذلك المجال. تم دمج خصائص خوارزمية الشبكة العصبية الاصطناعية (FANN) والخوارزمية الجينية لإنشاء آلية عمل مهمة تساعد في هذا المجال. حيث يمكن استخدام النظام المقترح للمهام الأساسية في الحياة ، مثل التحليل والأتمتة والتحكم والتعرف والمهام الأخرى. التقاطع والطفرة هما الآليتان الأساسيتان اللتان تستخدمهما الخوارزمية الجينية في النظام المقترح لاستبدال عملية الانتشار العكسي في ANN. بينما تركز تقنية الشبكة العصبية الاصطناعية المغذية على معالجة المدخلات ، يعتمد هذا العمل على عملية كسر خوارزمية الشبكة العصبية الاصطناعية المغذية. بالإضافة إلى ذلك ، يتم حساب النتيجة من كل ANN أثناء عملية التفكك ، والتي تعتمد على تقسيم خوارزمية الشبكة العصبية الاصطناعية إلى عدة شبكات ANN بناءً على عدد طبقات ANN ، وبالتالي ، كل طبقة في الشبكة العصبية الاصطناعية الأصلية يتم تقييمها. يتم اختيار أفضل الطبقات لمرحلة التقاطع بعد عملية الكسر ، بينما تمر الطبقات الأخرى بعملية الطفرة. ثم يتم تحديد مخرجات هذا الجيل من خلال دمج الشبكات العصبية الاصطناعية في شبكة ANN واحدة ؛ ثم يتم فحص النتيجة لمعرفة ما إذا كانت العملية تحتاج إلى إنشاء جيل جديد. ان أداء النظام جيدًا وأنتج نتائج دقيقة عند استخدامه مع البيانات المأخوذة من نظام Vicon Robot ، والذي تم تصميمه بشكل أساسي لتسجيل السلوكيات البشرية بناءً على بيانات ثلاثية الابعاد وتصنيفها على أنها طبيعية أو عدوانية.These days, it is crucial to discern between different types of human behavior, and artificial intelligence techniques play a big part in that. The characteristics of the feedforward artificial neural network (FANN) algorithm and the genetic algorithm have been combined to create an important working mechanism that aids in this field. The proposed system can be used for essential tasks in life, such as analysis, automation, control, recognition, and other tasks. Crossover and mutation are the two primary mechanisms used by the genetic algorithm in the proposed system to replace the back propagation process in ANN. While the feedforward artificial neural network technique is focused on input processing, this should be based on the process of breaking the feedforward artificial neural network algorithm. Additionally, the result is computed from each ANN during the breaking up process, which is based on the breaking up of the artificial neural network algorithm into multiple ANNs based on the number of ANN layers, and therefore, each layer in the original artificial neural network algorithm is assessed. The best layers are chosen for the crossover phase after the breakage process, while the other layers go through the mutation process. The output of this generation is then determined by combining the artificial neural networks into a single ANN; the outcome is then checked to see if the process needs to create a new generation. The system performed well and produced accurate findings when it was used with data taken from the Vicon Robot system, which was primarily designed to record human behaviors based on three coordinates and classify them as either normal or aggressive
BlogForever D2.4: Weblog spider prototype and associated methodology
The purpose of this document is to present the evaluation of different solutions for capturing blogs, established methodology and to describe the developed blog spider prototype
Photon cooling: linear vs nonlinear interactions
Linear optics imposes a relation that is more general than the second law of
thermodynamics: For modes undergoing a linear evolution, the full mean
occupation number (i.e. photon number for optical modes) does not decrease,
provided that the evolution starts from a (generalized) diagonal state. This
relation connects to noise-increasing (or heating), and is akin to the second
law and holds for a wide set of initial states. Also, the Bose-entropy of modes
increases, though this relation imposes additional limitations on the initial
states and on linear evolution. We show that heating can be reversed via
nonlinear interactions between the modes. They can cool -- i.e. decrease the
full mean occupation number and the related noise -- an equilibrium system of
modes provided that their frequencies are different. Such an effect cannot
exist in energy cooling, where only a part of an equilibrium system is cooled.
We describe the cooling set-up via both efficiency and coefficient of
performance and relate the cooling effect to the Manley-Rowe theorem in
nonlinear optics.Comment: 16 pages, 9 figures; second extended version to appear in Physical
Review
THE REACTION OF INDUSTRIAL COMPANIES TO CRISIS: CHANGES IN BUSINESS-MODEL AND STRATEGIC SUSTAINABILITY
Nowadays the changes in the geopolitical situation significantly affect the conditions for doing business in Russia. The article reviews the peculiarities of the development of Russian industrial companies and the subsidiaries of foreign companies, operating in Russia, in difficult economic conditions. The contemporary consequences of global financial crisis of 2008 with respect to the industrial sector of the economy are also reviewed. The author performed an empirical study of the question of whether the companies' sustainable survival in 2014–2016 was affected by the change in the business model and whether these changes were caused by the experience of the previous crisis. The study considered the differences in the behavior of foreign and Russian companies, and the strategies, that reduce the risk of default, are defined
THE RELATIONSHIP OF FINANCIAL STRATEGIES AND DYNAMICS OF DEVELOPMENT OF INDUSTRIAL COMPANIES
Apattern of mutual independence of financial position of industrial companies and credit institutions was identified. The issues of development of industrial companies in difficult economic conditions, the causes and consequences of deterioration of credit institutions, the issues of control over the flow of funds from the real sector of the economy to the financial sector are studied as cause-effect relationships in development of industrial companies and the overall change in the macroeconomic environment
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