Controlled conditions

Xem 1-20 trên 297 kết quả Controlled conditions
  • Thermal Analysis is a well-established set of techniques for obtaining qualitative and quantitative information about the effects of various heat treatments on materials of all kinds, including new chemical compounds, plastics, ceramics, alloys, construction materials, minerals, foods and medicines. Heating is performed under strictly controlled conditions and can reveal changes in structure and other important properties of the material being studied. Such studies are of great practical importance in the use of materials....

    pdf155p beobobeo 01-08-2012 35 8   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: ITERATIVE SCHEMES WITH SOME CONTROL CONDITIONS FOR A FAMILY OF FINITE NONEXPANSIVE MAPPINGS IN BANACH SPACES

    pdf11p sting11 10-03-2012 15 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Convergence and weaker control conditions for hybrid iterative algorithms

    pdf14p dauphong12 08-02-2012 14 2   Download

  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "Gas exchange and water relations of 3 sizes of containerized Picea mariana seedlings subjected to atmospheric and edaphic water stress under controlled conditions...

    pdf9p toshiba7 08-10-2011 18 1   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: The significance of controlled conditions in lentiviral vector titration and in the use of multiplicity of infection (MOI) for predicting gene transfer events

    pdf0p toshiba20 12-11-2011 19 1   Download

  • A control system is a collection of components working together under the direction of some machine intelligence. In most cases, electronic circuits provide the intelligence, and electromechanical components such as sensors and motors provide the interface to the physical world. A good example is the modern automobile. Various sensors supply the on-board computer with information about the engine’s condition. The computer then calculates the precise amount of fuel to be injected into the engine and adjusts the ignition timing. T...

    doc661p hoanglong89hui 24-06-2010 196 99   Download

  • Today’s control system designers face an ever-increasing “need for speed” and accuracy in their system measurements and computations. New design approaches using microcontrollers and DSP are emerging, and designers must understand these new approaches, the tools available, and how best to apply them. This practical text covers the latest techniques in microcontroller-based control system design, making use of the popular MSP430 microcontroller from Texas Instruments.

    pdf329p nhulan0908 30-09-2012 104 61   Download

  • Typical dynamic responses are also shown. The motor is initially at standstill and at no load when a step command in speed is applied; when steady-state conditions are reached, a reversal of speed is commanded followed by a step load application. The system is highly nonlinear due to the introduction of saturation needed to limit both the current delivered and the voltage applied to the motor.

    doc20p meoden89nd 15-01-2011 121 38   Download

  • The control system for a star delta contactor is sequence circuit. The star contactor and delta contactor are interlocked relative to each other with a ‘either - or’ condition. Switching from ‘star’ to ‘delta’ is done automatically by means of a time relay. In the circuit above, the star contactor is energised first, then the mains contactor. Circuits in which the mains contactor is energised first, followed by the star contactor, are also common.

    ppt14p vanquynh261 09-10-2010 112 31   Download

  • The purpose of this manual is to provide the reader with a fundamental understanding of controls and how they are applied to the many parts of heating, ventilating, and air conditioning systems in commercial buildings. Many aspects of control are presented including air handling units, terminal units, chillers, boilers, building airflow, water and steam distribution systems, smoke management, and indoor air quality. Control fundamentals, theory, and types of controls provide background for application of controls to heating, ventilating, and air conditioning systems. ...

    pdf518p hoangnhan123 15-10-2009 86 21   Download

  • Automatic process control is concerned with maintaining process variables, temperatures, pressures, flows, compositions, and the like, at a desired operating value. As we shall see in the ensuing pages, processes are dynamic in nature. Changes are always occurring, and if actions are not taken, the important process variables— those related to safety, product quality, and production rates—will not achieve design conditions.

    pdf227p nhatkyvodanh 11-08-2012 53 19   Download

  • Tham khảo sách 'refrigeration and air conditioning iv (equipment cooling) aipd', kỹ thuật - công nghệ, năng lượng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf161p chipmoon 19-07-2012 51 18   Download

  • (USGS) is to assess the quantity and quality of the natural resources of the Nation and to provide information that will assist resource managers and policymakers at Federal, State, and local levels in making sound decisions. Assessment of water-quality conditions and trends is an important part of this overall mission. One of the greatest challenges faced by waterresources scientists is acquiring reliable information that will guide the use and protection of the Nation’s water resources.

    pdf39p lulanphuong 20-03-2012 58 16   Download

  • This is a thorough revision of the definitive, classic text for any level course on refrigeration, refrigeration and air conditioning, and environmental control in buildings. It is an equipment-oriented textbook that applies theoretical results of engineering theories to refrigeration and air conditioning engineering problems. This enables the student to understand both common and uncommon problems in designing, selecting and applying air conditioning and refrigeration components and systems.

    pdf161p kennybibo 14-07-2012 38 13   Download

  • This section describes heating, ventilating, and air conditioning (HVAC) systems and discusses characteristics and components of automatic control systems. Cross-references are made to sections that provide more detailed information. A correctly designed HVAC control system can provide a comfortable environment for occupants, optimize energy cost and consumption, improve employee productivity, facilitate efficient manufacturing, control smoke in the event of a fire, and support the operation of computer and telecommunications equipment....

    pdf518p nhan1234 19-10-2009 78 12   Download

  • Diesel engines, also known as CI engines, possess a wide field of applications as energy converters because of their higher efficiency. However, diesel engines are a major source of NOX and particulate matter (PM) emissions. Because of its importance, five chapters in this book have been devoted to the formulation and control of these pollutants. The world is currently experiencing an oil crisis. Gaseous fuels like natural gas, pure hydrogen gas, biomass-based and coke-based syngas can be considered as alternative fuels for diesel engines.

    pdf278p bunmang_1 03-05-2013 60 11   Download

  • The current control problems present natural trend of increasing its complexity due to performance criteria that is becoming more sophisticated. The necessity of practicers and engineers in dealing with complex dynamic systems has motivated the design of controllers, whose structures are based on multiobjective constraints, knowledge from expert, uncertainties, nonlinearities, parameters that vary with time, time delay conditions, multivariable systems, and others.

    pdf288p namde01 11-04-2013 34 10   Download

  • How Direct Expansion Air-Conditioning Achieves Performance Goals For most of the A / C market, refrigeration-based ( DX ) cooling is the standard, and provides a point of comparison for new technologies. To describe the benefits and improvements of DEVap A / C technology, we must discuss standard A / C. Standard A / C reacts to SHR by cooling the air sensibly and, if dehumidification is required, by cooling the air below the dew point.

    pdf61p beobobeo 01-08-2012 37 9   Download

  • The current control problems present natural trend of increasing its complexity due to performance criteria that is becoming more sophisticated. The necessity of practicers and engineers in dealing with complex dynamic systems has motivated the design of controllers, whose structures are based on multiobjective constraints, knowledge from expert, uncertainties, nonlinearities, parameters that vary with time, time delay conditions, multivariable systems, and others.

    pdf0p aries23 29-09-2012 35 9   Download

  • As SUNY New Paltz administrators strive to achieve the college’s mission and goals and to provide accountability for their operations, they need to continually assess and evaluate their internal control structure to assure that it is well designed and operating effectively, appropriately updated to meet changing conditions, and provides reasonable assurance that the objectives of the department are being achieved.

    pdf45p hoadat_1990 12-07-2013 32 8   Download

Đồng bộ tài khoản