Petroleum Engineering Handbook

... Structural Concrete Design 4.1 4.2 4.3 4.4 4.5 Properties of Concrete and Reinforcing Steel Properties of Concrete • Lightweight Concrete • Heavyweight Concrete • High-Strength Concrete ... and Mixing Concrete Proportioning Concrete Mix • Admixtures • Mixing Flexural Design of Beams and One-Way Slabs Reinforced Concrete Strength Design • Prestressed Concrete Streng...

Ngày tải lên: 17/08/2013, 12:06

... distinguishing feature of robotics is its multidisciplinary nature — to successfully design robotic systems one must have a grasp of electrical, mechanical, industrial, and computer engineering, as well ... another breakthrough in robotics that will afford some levels of autonomy in unstructured environments On a practical level, robots are distinguished from other electromechanical mot...

Ngày tải lên: 06/11/2013, 09:15

... Fy j + Fz k = − i+ j+ k ∂y ∂z   ∂x 1-39 Mechanics of Solids Conservation of Mechanical Energy Conservation of mechanical energy is assumed if kinetic energy (T) and potential energy (V) change ... and Disadvantages of the Energy Method There are four advantages to using the energy method in engineering problems: Accelerations not need to be determined Modifications of problems are ea...

Ngày tải lên: 23/12/2013, 00:15

... Rizzoni 5.12 Electromechanical Systems Giorgio Rizzoni SECTION Mechanical System Controls Jan F Kreider 6.1 Human – Machine Interaction Thomas B Sheridan 6.2 The Need for Control of Mechanical Systems ... 20.2 Product Liability and Safety George A Peters 20.3 Bioengineering Jeff R Crandall, Gregory W Hall, and Walter D Pilkey 20.4 Mechanical Engineering Codes and Standard Michael Merk...

Ngày tải lên: 23/12/2013, 00:15

... coefficients in the same manner as the coefficient of utilization The room position multiplier is a function of the room cavity ratio and of the location in the room of the point where the illumination ... both Reduce the area of high luminance causing the glare condition Increase the angle between the glare source and the line of vision Increase the luminance of th...

Ngày tải lên: 30/12/2013, 22:33

... tensile stress in the x-direction, for example, will strain the lattice in the xy-plane and destroy the three-fold symmetry, thereby lifting the degeneracy of the energy minima However, the four-fold ... permission.) According to the deformation potential theory, the strain will shift the energy of all the states in a given band extremum by the same amount, i.e., the...

Ngày tải lên: 30/12/2013, 22:33

... in the characterization of the latter Some authors choose to discuss the Hall effect in terms of the Hall angle, f, shown in Fig 52.1, which is the angle between the net electric field and the ... in the y direction The angle f between the current and net electric field is called the Hall angle 52.2 Theoretical Background The Boltzmann equation for an electron gas in a h...

Ngày tải lên: 30/12/2013, 22:33

... superconductor The correlations of the electrons in the superconductor must lower the overall energy of the system or else the material would not be superconducting in the first place Because the critical ... (53.5) where the left side of the expression is the power flowing into the region By taking the time derivative of the energy density and appealing to Faraday’s...

Ngày tải lên: 30/12/2013, 22:33

... where G T is the thermal conductance from the element to the environment, t T is the thermal time constant of the element, t E is the electrical time constant of the element, R G is the electrical ... constant, T is the absolute temperature, tand is the dielectric loss tangent of the detector material, C E is the electrical capacitance of the element, and C A i...

Ngày tải lên: 30/12/2013, 22:33

... overcompensates for the current due to the deep traps The mobility of the free charge carriers is determined by the depth of the traps, the field resulting from the trapped charges, and the temperature ... assumed not to disturb the trapped charge; the received electrical signal is then correlated with the acoustical wave to determine the profile of the trapped cha...

Ngày tải lên: 30/12/2013, 22:33

... employed The mercury thermometer was mentioned in the Introduction as a nonelectrical sensor The most commonly used electrical temperature sensors are thermocouples, thermistors, and resistance thermometers ... temperature As the electrons in the metal gain thermal energy, they move about more rapidly and undergo more frequent collisions with each other and the atomic nuclei The...

Ngày tải lên: 30/12/2013, 22:33

... data, the same thermal process can be applied while reversing the direction of the bias magnetic field To read the stored information optically, the Kerr effect is used to detect the presence of these ... light waves The superposition of these two waves produces a linearly polarized wave The plane of polarization of the resultant wave rotates as one circular wave overtakes t...

Ngày tải lên: 30/12/2013, 22:33