heating and cooling systems reviews

Ngày tải lên: 27/06/2014, 05:20

... reads the annual TRNSYS heating and cooling load profile so as to determine the values of the peak heating and cooling loads for each month of the year (see Table 2) and their durations. Moreover, ... geometrical attributes and inf H the factor of opening’s position and air force exposure. Annual heating demand of the building is 33.78 kWh/m 2 whereas cooling demand is 27.34 kWh/m 2 . ... temperature estimations (average deviation ±2.5 K) when annual heating and cooling demand values are close and approximately equal to 30 kWh/m 2 and it is assumed heat pump absence. 5. Conclusion...

Ngày tải lên: 05/09/2013, 16:10

Ngày tải lên: 05/09/2013, 16:10

Ngày tải lên: 27/06/2014, 17:20

Ngày tải lên: 27/06/2014, 17:20

... SHU: Short-term and Heavy rainy, SDG: S hort-term and Drainage, LSD: Long-term and Stagnant, LHT: Long-term and Heavy rainy, LMK: L ong-term and Monsoon flood, PDL: Persistent and Drainage, PHS: ... supply and (c) sanitation systems and attitudes for (d) water treatment at home, (e) children’s defecation habits and (f) hygiene practices Note: Communities code name, SRM: Short-term and Rainy, ... no latrine at all Hand washing with soap before eating Hand washi ng without s oap before eating No hand washing before eating Hand washing after defecation with soap Hand washing after defecation...

Ngày tải lên: 05/09/2013, 10:15

Ngày tải lên: 05/09/2013, 15:28

Ngày tải lên: 04/10/2013, 19:10

... rotational, and hybrid actuators and sensors can be synthesized, and a motion classifier is { } ℵ∈=ℵ nn: . Therefore, we have ( ){ } ℵ∈∈∈∈=ℵ××× nTtGgMmntgmTGM and, ,:,,, . Winding and cooling, power and ... or characteristic. Let A stands for actuators, B stands for sensors, and C stands for translational motion microstructure. Then, the region ABC represents actuators and sensors which are synthesized ... excitation, air gap and winding configurations, cooling and other important quantities. All possible actuator and sensor configurations can be classified using endless (closed) and open-ended (open)...

Ngày tải lên: 17/10/2013, 11:15

... NANO- AND MICROELECTROMECHANICAL SYSTEMS 4.1. FUNDAMENTALS OF ELECTROMAGNETIC RADIATION AND ANTENNAS IN NANO- AND MICROSCALE ELECTROMECHANICAL SYSTEMS The electromagnetic power is generated and ... fields, electric and magnetic field vectors form separate and independent pairs. That is, E and D are not related to H and B, and vice versa. However, for time- varying electric and magnetic fields, ... closed-loop systems use the data from different sensors, feedback commands (controls) are generated and executed, and intelligent updates and evolution are performed. The feedback for sensor and control...

Ngày tải lên: 19/10/2013, 18:15

... the stator and rotor circuitry dynamics. As the control and state variables we use the voltages applied to the stator (as and bs) and rotor (ar and br) windings, as well as the stator and rotor ... bs , and i cs are the phase currents in the stator windings as, bs and cs; i i qs ds , and i os are the quadrature-, direct-, and zero-axis components of stator currents; ψ ψ as bs , and ... ds , and ψ os are the quadrature-, direct-, and zero-axis components of stator flux linkages; u u ar br , and u cr are the voltages in the rotor windings ar, br and cr; u u qr dr , and u or ...

Ngày tải lên: 19/10/2013, 18:15

... changing standards for APIs, gateways, security methods, screens, operating systems, and browsers. There are also variable computing powers on the handheld devices and different bandwidth requirements. Wireless ... The WebSphere application server will handle the data dynamically and adapt it to the handheld device. Also it can run multiple applications and requests, and can be easily integrated to the backend ... install, configure and add new services: • The client application must be easy to install, customize, and add new handheld devices. • Easy to Integrate with other servers and Back-End systems: • Integration...

Ngày tải lên: 26/10/2013, 16:15

... Evolution and the Meanings of Life. New York: Simon and Schuster. Depew, D. J. 1998. Intelligent design and irreducible complexity. A rejoinder. Rhetoric and Public Affairs 1: 571–8. Depew, D. J., and ... Evolutionary Systems: Biological and Epistemological Perspectives on Selection and Self-Organization, ed. G. Van de Vijver, S. N. Salthe, and M. Delpos. Dordrecht: Kluwer, pp. 59–66. Weber, B. H., and ... Brains, Cities, and Software. New York: Scribner. Joyce, G. F., and L. E. Orgel 1993. Prospects for understanding the origin of the RNA world. In The RNA World, ed. R. F. Gesteland and J. F. Atkins....

Ngày tải lên: 01/11/2013, 07:20

... is H 4 = " H 2 H 2 H 2  H 2 # = 2 6 6 6 4 1111 1  11  1 11  1  1 1  1  11 3 7 7 7 5  (1.45) where row 1 and column 1 are Walsh code 0, or w 0 ;row3andcolumn3arew 1 ;row 4and column 4 are w 2 ; and row 2 and column 2 are w 3 . The Walsh code number w j is ... vectors g 1 = 101 ] and g 2 = 111 ] (1.17) and the corresponding code word  c 2  c 1 ] ,where c 1 = 2 6 4 b 2 b 1 b 0 3 7 5 g 1 and c 2 = 2 6 4 b 2 b 1 b 0 3 7 5 g 2  (1.18) and where b 0 , b 1 ,andb 2 are ... polynomials g 1 ( z )= 1 + z 2 and g 2 ( z )= 1 + z + z 2  (1.19) where 1 denotes the present input bit, and z and z 2 represent the previous input bits having one and two clock period delays, respectively, and + is...

Ngày tải lên: 07/11/2013, 16:15

... of the variations in the terrain and the distribution of buildings and streets. We allow for these variations by introducing a random variable λ having zero mean and standard deviation σ. Often λ ... random variable of the error in S 0 (dB) δ 0 random variable of the power control error in the received interference power ε random variable with standard deviation p 2 σ e λ shadow fading random ... variations using a log-normal distribution having a standard deviation of 4 dB and 3.5 dB for LOS and OOS paths, respectively [26]. The effect of path loss and shadow fading on the received signal power...

Ngày tải lên: 14/12/2013, 23:15

... filter pass band extends from 0 to f p and the stop band extends from f s to ∞. Within the pass band the filter response is prescribed within the limits  δ 1 , and within the stop band the filter ... PNI and PNQ codes, baseband filtered and modulated onto two quadrature carriers using the phase mapping described in Table 4.7. The PNI and PNQ codes have the same offset as the pilot channel and ... PNI and PNQ sequences dis- play perfect cross-correlation (see Equation (4.26)) and autocorrelation (see Equations (4.31)– (4.34)) properties. This is not so in the practical cdmaOne systems and...

Ngày tải lên: 14/12/2013, 23:15

... interfering mobile and zeroth BS, is r j = q D 2 j + r 2  2D j r cos ( ϕ ) (5.81) and ζ is the difference between λ ij and λ 0 , the independent random variables with zero mean and standard deviation ... b i ( t ) represents random independent binary data, and as a consequence the intracellular interference is a stationary random process. From the Central Limit Theorem, the summation of N  1 independent random ... random variable with zero mean and variance of σ 2 ζ = 2σ 2 , while D j is the distance between the zeroth BS and the jth co-channel BS. Note that a 2 0 j in Equation (5.80) is the path loss and...

Ngày tải lên: 14/12/2013, 23:15

... of address and control information to the PDU for routing within and between PLMNs. Encapsulation, and its reverse, are performed between the GGSN nodes of PLMNs, and between the SGSN and an MS. ... wider bandwidth systems as more bandwidth is available for 3G networks. We therefore agree that IS-95 is a 2.5G system and its evolution to 3G should be smooth. This is not so for 2G TDMA systems which ... architecture. Chapter 6 Evolution of GSM and cdmaOne to 3G Systems 6.1 Introduction The previous chapters have concentrated on the two leading second generation (2G) cellular systems: GSM and IS-95. These systems are deployed...

Ngày tải lên: 14/12/2013, 23:15

... Dordrecht, 1991. [13] C.C. Lee, Fuzzy logic in control systems: Fuzzy logic controller, Parts I and II, IEEE Transactions on Systems, Man and Cybernetics 20 (2) (1990) 404–435. [14] H. Maaref, ... small) for the values between 0.2 and 0.7, Z (approximately zero) for the values between −0.2 and 0.2, NS (negative small) for the values between −0.2 and −0.7, and NB (negative big) for the values ... ∗) are different and they differ from only one linguistic concept (PS instead of PB and Z instead of PS and NS). So, we can claim that the extracted rules are quite logical and coherent. Moreover,...

Ngày tải lên: 22/12/2013, 21:18

... positioned in such a way as to allow sufficient guard bands between other ser- vices operating above and below the cellular band and between the A and B services. Con- sequently, the CDMA carriers ... spectral guard bands between the different operator frequency blocks (unless adjacent blocks are allocated to the same operator) and between the systems that occupy the frequency bands above and below ... US cellular band (800 MHz) and we shall use the term ‘CDMA-PCS’ to describe the PCS system operating in the 1.9 GHz band. In many cases our discussion will relate to both systems and in this case...

Ngày tải lên: 23/12/2013, 17:15