policies procedures and systems

... same house and flock Materials and methods Chicken flocks The Danish Veterinary Institute receives all Salmonella samples submitted under the Danish Salmonella Control Programme for parent and table-egg ... the same period, and infected with S enterica prior to sampling Houses with broilers, rearing stock on floor, and table egg layers in either free range, deep litter or organic systems fulfilled ... deep litter, organic flocks and free range flock) The number of investigated flocks distributed on production category and Salmonella serovar is shown in Table Sampling procedures Broiler flocks:...

Ngày tải lên: 12/08/2014, 15:20

... Compressor systems and operations • Heat exchanger and cooling tower systems and operations • Steam generation and furnace systems and operations • Reactor systems and operations Key concepts and learning ... piping, tanks, and vessels • Pumps, compressors, and simple systems • Turbines and motors • Heat exchangers, cooling towers, and simple systems • Steam generation, fired heaters, and systems • Process ... and systems • Process symbols, diagrams, and instrumentation • Utility and separation systems • Reactor, distillation columns, and systems • Plastics systems Each chapter in the text moves from...

Ngày tải lên: 15/08/2013, 07:50

... senior technician to learn basic line-ups, standard operating procedures, safety rules and regulations, and sampling techniques Process tanks and storage systems are equipped with the latest in modern ... underground salt domes, caverns, and other belowground storage systems Process technicians are required to safely operate and maintain each of the complex storage and transfer systems in a tank farm Figure ... very pronounced between 950° and 1,000°F (510°C and 537.77°C) For example, at 950° and 1,000°F (510°C and 537.77°C), the strength of low-carbon steel is about one-third and one-sixth, respectively,...

Ngày tải lên: 16/08/2013, 15:29

... Shutdown, and Troubleshooting of Compressor Systems Tables 5.1 and 5.2 illustrate typical startup and shutdown procedures Tables 5.3 and 5.4 illustrate troubleshooting charts for identifying and solving ... have a flexible pressure range and overall capacity, low power cost, and high efficiency rating They can handle density and gas composition changes, and small volumes and can deliver high pressures ... Membranes are designed to be durable and tough and able to withstand high temperatures and a variety of conditions Diaphragm compressors can generate very high pressures and are used to compress hydrogen,...

Ngày tải lên: 19/08/2013, 10:47

... hold the baffles in place and prevent vibration and excessive tube movement Nozzles and Accessory Parts Shell -and- tube inlet and outlet nozzles are sized for pressure drop and velocity considerations ... shell and tube, reboiler, plate and frame, air cooled, and spiral The shell -and- tube heat exchanger is the most common in the process industry Shell -and- tube heat exchangers are designed to handle ... between them and how each applies to heat exchangers Which is (are) the most critical and why? Draw and label a hairpin heat exchanger Draw and label a shell -and- tube heat exchanger Draw and label...

Ngày tải lên: 20/08/2013, 10:39

... water and steam flow rates and temperatures and water level in the boiler The operator also checks for smoke and checks burner and flame pattern The operator maintains good housekeeping and unit ... the trap and comes into contact with the bellows Condensate causes the bellows to contract and open Steam causes the bellows to expand and close Bellows traps can handle condensate and noncondensable ... good housekeeping and unit logs and checks fuel pressure and temperature and oxygen level Finally, the operator monitors the pressure of 220 Steam Systems the firebox and drum; the temperatures in...

Ngày tải lên: 21/08/2013, 10:47

... material codes, and steam traps Pumps and Tanks Pumps and tanks come in a variety of designs and shapes Common pump and tank symbols are shown in Figure 12.11 Compressors, Steam Turbines, and Motors ... technicians and instrument and electrical, mechanical, safety, and engineering personnel In order to read a P&ID, the technician needs an understanding of the equipment, instrumentation, and technology ... distillation column, furnace, and boiler (Figure 12.1A) There are symbols to represent major and minor process lines and pneumatic, hydraulic, or electric lines, and there is a wide variety of...

Ngày tải lên: 23/08/2013, 14:30

... devices such 356 Reactor Systems as high-pressure relief valves and alarms, high-temperature alarms and emergency cooling, fire control systems, and toxic chemical detection systems are available ... drops, and impurities in the feed or product streams The type and quantity of instrumentation are usually determined by past data and experience and from research and development Reactor Systems ... systems, process variable alarms, and automatic shutdown controls Quench systems are designed to stop the reaction process Pressure relief systems are sized to handle and contain any release from...

Ngày tải lên: 23/08/2013, 14:47

... adhesives; hard and soft plastic; plastic fibers and fabric; and resistant, decorative, and transparent plastic Various methods are used in this process In extrusion, solid resins are melted and pushed ... adhesives; hard and soft plastic; plastic fibers and fabric; and resistant, decorative, and transparent plastic Various methods are used in this process In extrusion, solid resins are melted and pushed ... return head and is designed to expand (float) inside the shell as temperature rises Floating-roof tank—has an open top and a pan-like structure that floats on top of the liquid and moves up and down...

Ngày tải lên: 27/08/2013, 07:28

... http://www.tiaonline.org, or contact Andy Dryden at (703) 907-7633 Category Cabling: A Standards and Systems Overview Category Cabling: A Standards and Systems Overview Published by the Category Consortium Introduction ... in the category standard as a fundamental requirement and not as an addendum, as was the case for category 5e Category Cabling: A Standards and Systems Overview • Measurement procedures for connecting ... hardware NEXT and FEXT These procedures required the creation of brand new fixtures, calibration procedures and many refinements to ensure repeatability in different laboratories Other Standards Applicable...

Ngày tải lên: 10/12/2013, 02:15

... http://www.tiaonline.org, or contact Andy Dryden at (703) 907-7633 Category Cabling: A Standards and Systems Overview Category Cabling: A Standards and Systems Overview Published by the Category Consortium Introduction ... in the category standard as a fundamental requirement and not as an addendum, as was the case for category 5e Category Cabling: A Standards and Systems Overview • Measurement procedures for connecting ... hardware NEXT and FEXT These procedures required the creation of brand new fixtures, calibration procedures and many refinements to ensure repeatability in different laboratories Other Standards Applicable...

Ngày tải lên: 20/12/2013, 22:15

... Deterministic Signal (b) Random Signal 1.1.2.7 Right-Handed vs Left-Handed A right-handed signal and left-handed signal are those signals whose value is zero between a given variable and positive or negative ... discrete-time signals, like e-mail, is accomplished with analog signals and systems Understanding how discrete-time and analog signals and systems intertwine is perhaps the main goal of this course 21 ... 2.2.3 Linear Time-Invariant (LTI) Systems Certain systems are both linear and time-invariant, and are thus referred to as LTI systems Linear Time-Invariant Systems (a) (b) This is a combination...

Ngày tải lên: 22/12/2013, 12:16

... is some known function of integration x and the parameter α , a and b are constants independent of x and α , and the pardF tial derivative ∂f ⁄ ∂α exists and it is continuous, then = dα 2-6 ... 2e – 2t – 20 δ ( t – ) Signals and Systems with MATLAB Applications, Second Edition Orchard Publications 1-23 Chapter Elementary Signals NOTES 1-24 Signals and Systems with MATLAB Applications, ... } = s ⎧ L ⎨ ⎩ t ⎫ ∫0 f ( τ ) dτ ⎬ = ⎭ F(s) -s (2.26) and the proof of (2.23) follows from (2.25) and (2.26) Signals and Systems with MATLAB Applications, Second Edition Orchard Publications...

Ngày tải lên: 19/01/2014, 18:20

... Signals and Systems with MATLAB® Applications Second Edition Steven T Karris Students and working professionals will find Signals and Systems with MATLAB® Applications, ... Edition, to be a concise and easy-to-learn text It provides complete, clear, and detailed explanations of the principal analog and digital signal processing concepts and analog and digital filter design ... Equations • The Impulse Response and Convolution • Fourier Series • The Fourier Transform • Discrete Time Systems and the Z Transform • The DFT and The FFT Algorithm • Analog and Digital Filters • Introduction...

Ngày tải lên: 19/01/2014, 18:20

... SIGNALS AND SYSTEMS (4 Fig 1-25 [CHAP SIGNALS AND SYSTEMS 1.8 Show that (a) If x(t) and x [ n ] are even, then (1.75a) ( I 75b) ( b ) If x(t) and x[n] are odd, then x(0) = and ~ ( rdr = ) and x[O] ... Since x ( t ) and x [ n ] are odd, that is, x( - t ) = - x ( t ) and x [ - n ] X ( - ) = -x(O) and = -x[n], x[-01 = -x[O] we have CHAP 11 SIGNALS AND SYSTEMS Hence, Similarly, and in view of ... SIGNALS AND SYSTEMS [CHAP common multiple of T, and T2, and it is given by Eq (1.84) if the integers m and k are relative prime If the ratio T,/T, is an irrational number, then the signals x,(t) and...

Ngày tải lên: 19/01/2014, 19:20

... and its application to discrete-time LTI systems The Fourier analysis of signals and systems is treated in Chapters and Chapter considers the Fourier analysis of continuous-time signals and systems, ... System with single or multiple input and output signals G CHAP 11 SIGNALS AND SYSTEMS B Continuous;Time and Discrete-Time Systems: If the input and output signals x and p are continuous-time signals, ... causal Examples of noncausal systems are Note that all memoryless systems are causal, but not vice versa 18 SIGNALS AND SYSTEMS [CHAP E Linear Systems and Nonlinear Systems: If the operator T...

Ngày tải lên: 19/01/2014, 19:20

... SIGNALS AND SYSTEMS (4 Fig 1-25 [CHAP SIGNALS AND SYSTEMS 1.8 Show that (a) If x(t) and x [ n ] are even, then (1.75a) ( I 75b) ( b ) If x(t) and x[n] are odd, then x(0) = and ~ ( rdr = ) and x[O] ... Since x ( t ) and x [ n ] are odd, that is, x( - t ) = - x ( t ) and x [ - n ] X ( - ) = -x(O) and = -x[n], x[-01 = -x[O] we have CHAP 11 SIGNALS AND SYSTEMS Hence, Similarly, and in view of ... SIGNALS AND SYSTEMS [CHAP common multiple of T, and T2, and it is given by Eq (1.84) if the integers m and k are relative prime If the ratio T,/T, is an irrational number, then the signals x,(t) and...

Ngày tải lên: 19/01/2014, 20:20

... is some known function of integration x and the parameter α , a and b are constants independent of x and α , and the pardF tial derivative ∂f ⁄ ∂α exists and it is continuous, then = dα 2-6 ... 2e – 2t – 20 δ ( t – ) Signals and Systems with MATLAB Applications, Second Edition Orchard Publications 1-23 Chapter Elementary Signals NOTES 1-24 Signals and Systems with MATLAB Applications, ... } = s ⎧ L ⎨ ⎩ t ⎫ ∫0 f ( τ ) dτ ⎬ = ⎭ F(s) -s (2.26) and the proof of (2.23) follows from (2.25) and (2.26) Signals and Systems with MATLAB Applications, Second Edition Orchard Publications...

Ngày tải lên: 25/01/2014, 13:20

... Signals and Systems with MATLAB® Applications Second Edition Steven T Karris Students and working professionals will find Signals and Systems with MATLAB® Applications, ... Edition, to be a concise and easy-to-learn text It provides complete, clear, and detailed explanations of the principal analog and digital signal processing concepts and analog and digital filter design ... Equations • The Impulse Response and Convolution • Fourier Series • The Fourier Transform • Discrete Time Systems and the Z Transform • The DFT and The FFT Algorithm • Analog and Digital Filters • Introduction...

Ngày tải lên: 25/01/2014, 13:20