Xem 1-20 trên 32 kết quả Efficient machining processes
  • The principle of Occam’s razor loosely translates to “the simplest solution is often the best”. The author of Kinematic Geometry of Surface Machining utilizes this reductionist philosophy to provide a solution to the highly inefficient process of machining sculptured parts on multi-axis NC machines. He has developed a method to quickly calculate the necessary parameters, greatly reduce trial and error, and achieve efficient machining processes by using less input information, and in turn saving a great deal of time.

    pdf516p kennybibo 14-07-2012 65 25   Download

  • Tham khảo sách 'crc press kinematic geometry of surface machining', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf516p chipmoon 19-07-2012 18 4   Download

  • This chapter aims to provide basic backgrounds of different types of machining processes and highlights on an understanding of important parameters which affects machining of metals. • Mechanics of machining is introduced for the calculation of power used in metal machining operation • Finally defects occurring in the machining processes will be discussed with its solutions. Significant factors influencing economics of machining will also be included to give the optimum machining efficiency.

    pdf78p tieulac 27-11-2010 31 5   Download

  • Motivated by the need of energy-efficiency improvements, process optimization, soft-start capability and numerous other environmental benefits, it may be desirable to operate induction motors for many applications at continuously adjustable speeds. The induction motor drives can provide high productivity with energy efficiency in different industrial applications and are the basis for modern automation. This book provides an account of this developing subject through such topics as modelling, noise, control techniques used for high-performance applications and diagnostics....

    pdf0p camchuong_1 04-12-2012 60 11   Download

  • Create your own natural language training corpus for machine learning. Whether you’re working with English, Chinese, or any other natural language, this hands-on book guides you through a proven annotation development cycle—the process of adding metadata to your training corpus to help ML algorithms work more efficiently. You don’t need any programming or linguistics experience to get started.

    pdf97p hoa_can 26-01-2013 21 5   Download

  • Parallel machines (mill-turn machining centers) provide a powerful and efficient machining alternative to the traditional sequential machining process.

    pdf34p nguyen3 13-11-2009 60 4   Download

  • Statistical methods require very large corpus with high quality. But building large and faultless annotated corpus is a very difficult job. This paper proposes an efficient m e t h o d to construct part-of-speech tagged corpus. A rulebased error correction m e t h o d is proposed to find and correct errors semi-automatically by user-defined rules. We also make use of user's correction log to reflect feedback. Experiments were carried out to show the efficiency of error correction process of this workbench. The result shows that about 63.2 % of tagging errors can be corrected. ...

    pdf5p bunrieu_1 18-04-2013 16 3   Download

  • This paper describes an efficient parallel system for processing Typed Feature Structures (TFSs) on shared-memory parallel machines. We call the system Parallel Substrate for TFS (PSTFS}. PSTFS is designed for parallel computing environments where a large number of agents are working and communicating with each other. Such agents use PSTFS as their low-level module for solving constraints on TFSs and sending/receiving TFSs to/from other agents in an efficient manner.

    pdf7p bunrieu_1 18-04-2013 12 2   Download

  • The goal of interactive machine translation is to improve the productivity of human translators. An interactive machine translation system operates as follows: the automatic system proposes a translation. Now, the human user has two options: to accept the suggestion or to correct it. During the post-editing process, the human user is assisted by the interactive system in the following way: the system suggests an extension of the current translation prefix. Then, the user either accepts this extension (completely or partially) or ignores it. ...

    pdf8p bunthai_1 06-05-2013 10 2   Download

  • In statistical natural language processing we always face the problem of sparse data. One way to reduce this problem is to group words into equivalence classes which is a standard method in statistical language modeling. In this paper we describe a method to determine bilingual word classes suitable for statistical machine translation. We develop an optimization criterion based on a maximumlikelihood approach and describe a clustering algorithm. We will show that the usage of the bilingual word classes we get can improve statistical machine translation. ...

    pdf6p bunthai_1 06-05-2013 12 2   Download

  • This paper presents an expectation-based Japaneseto-English translation system called JETR which relies on the forward expectation-refinement process to handle ungrammatical sentences in an elegant and efficient manner without relying on the presence of particles and verbs in the source text. JETR uses a chain of result states to perform context analysis for resolving pronoun and object references and filling ellipses. Unlike other knowledge-based systems, JETR attempts to achieve semantic, pragmatic, structural and lexical invariance. ...

    pdf7p bungio_1 03-05-2013 19 1   Download

  • Electrical machines are almost entirely used in producing electricity, and there are very few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of all electricity produced globally is used in electric motors, and the share of accurately controlled motor drives applications is increasing.

    pdf531p nguyenthai_thinh 21-03-2013 46 23   Download

  • An electric drive is the electromechanical system that converts electrical energy to mechanical motion. Being a part of automatic equipment, it acts together with the driven object, such as a machine tool, metallurgical, chemical, or flying apparatus, domestic or medical device. Electric drives area includes applications in computers and peripherals, motor starters, transportation (electric and hybrid electric vehicles, subway, etc.

    pdf102p sn_buon 29-11-2012 41 15   Download

  • Welded joints and their advantages: Welding is a very commonly used permanent joining process. Thanks to great advancement in welding technology, it has secured a prominent place in manufacturing machine components. A welded joint has following advantages: (i) Compared to other type of joints, the welded joint has higher efficiency. An efficiency 95 % is easily possible. (ii)Since the added material is minimum, the joint has lighter weight.

    pdf10p phuphong 09-12-2009 44 13   Download

  • In the last decade, the algorithms for the processing of the visual information have greatly evolved, providing efficient and effective solutions to cope with the variability and the complexity of real-world environments. These achievements yield to the development of Machine Vision systems that overcome the typical industrial applications, where the environments are controlled and the tasks are very specific, towards the use of innovative solutions to face with everyday needs of people.

    pdf188p bi_bi1 08-07-2012 26 5   Download

  • Continuance of the use of the internal combustion engine for automobiles is partly due to the improvement of engine control systems (onboard computers providing engine management processes, and electronically controlled fuel injection). Forced air induction by turbocharging and supercharging have increased power outputs and engine efficiencies. Similar changes have been applied to smaller diesel engines giving them almost the same power characteristics as petrol engines. This is especially evident with the popularity of smaller diesel engine propelled cars in Europe.

    pdf570p khangoc2392 12-08-2012 22 4   Download

  • China’s papermaking technology itself is relatively similar across establishments because, until recently, the industry relied on a couple of domestic manufacturers making nearly identical machines for each stage in the papermaking process (CTAPI (1993)). The critical differences in the technology come from the use of two alternative raw materials (wood and non-wood fibers) and from the production of either bleached or unbleached papers. Both differences are important to understanding the industry’s pollution.

    pdf30p loixinloi 08-05-2013 18 4   Download

  • So much is clear, that the keeping of the balance in the comprehensive machine process of industry is a matter of the gravest urgency if the productive mechanism is to proceed with its work in an efficient manner, so as to avoid idleness, waste, and hardship. The management of the various industrial plants and processes in due correlation with all the rest, and the supervision of the interstitial adjustments of the system, are commonly conceived to be a work of greater consequence to the community's well−being than any of the detail work involved in carrying...

    pdf120p bi_ve_sau 05-02-2013 15 3   Download

  • Vision plays a fundamental role for living beings by allowing them to interact with the environment in an effective and efficient way. The ultimate goal of Machine Vision is to endow artificial systems with adequate capabilities to cope with not a priori predetermined situations. To this end, we have to take into account the computing constraints of the hosting architectures and the specifications of the tasks to be accomplished, to continuously adapt and optimize the visual processing techniques. Nevertheless, by exploiting the low?cost computational power of off?the?...

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  • We describe a system of reversible grammar in which, given a logic-grammar specification of a natural language, two efficient PROLOGprograms are derived by an off-line compilation process: a parser and a generator for this language. The centerpiece of the system is the inversion algorithm designed to compute the generator code from the parser's PROLOG code, using the collection of minimal sets of essential arguments (MSEA) for predicates.

    pdf8p bungio_1 03-05-2013 28 1   Download

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