... rights of variable contract gas delivery are exercised on a daily basis and decisions on the make up and carry forward usage are made on an annual basis A major weakness of this work is that it lacks ... costs and substantial financial risks for the GENCOs, as the companies directly use gas prices as a barometer in the absence of real-time supply and demand information To mitigate such risks, ... its ability to manage the portfolio of natural gas contract and spot trading This thesis mainly concerns about the management of natural gas supply and contract gas allocation and valuation taking...
Ngày tải lên: 09/09/2015, 08:15
... with a guide vane, a discharge variation causes a head-loss variation imposed by the characteristic curve and the pressure waves pass through the runner inducing high efforts and tensions (Figure ... systems has enabled this type of analysis based on the profit of excess available energy that would be dissipated in special head loss devices, such has pressure reducing valves (PRV) Experimental ... results by Ramos et al are available for the first case and guide vane closure of a turbine, and they were obtained in lab conditions and compared with a reliable one-dimensional calculation Ramos...
Ngày tải lên: 05/09/2013, 14:58
Fault tree synthesis from a directed graph model for a power distribution network
... VSEN T2 EQ 42 Al FAILS S7 FO HEEL CHALLENGE The diesels are started on loss of voltage at VSEN2 and any of tedslscan dlvrall pwrrequired at BDA4 S' closes instantaneously on loss of voltage at ... process design and safety and reliability analysis He has worked for the Dow Chemical Company, Ethyl Corporation and numerous other chemical companies as a consultant He is president of Design Sciences, ... physical system topology [5] The process stops at the s0 .ES system boundary and the boundary variables are treated as P0 / -S primal events The unit models describe both normal and failed behavior...
Ngày tải lên: 03/01/2014, 19:37
Tài liệu quality systems and standards for a competitive edge ppt
Ngày tải lên: 21/02/2014, 08:20
TOOLS AND ENVIRONMENTS FOR PARALLEL AND DISTRIBUTED COMPUTING pptx
... model Simplicity A message-passing system should be simple and easy to use Efficiency A message-passing system should be as fast as possible Fault tolerance A message-passing system should guarantee ... Portability A message-passing system should be easily portable to most computing platforms 2.4 CLASSIFICATION OF MESSAGE-PASSING TOOLS In this section we classify message-passing tools and discuss the ... efficient access to all system resources Users can share special purpose and sometimes expensive hardware and software resources such as database servers, compute servers, virtual reality servers, multimedia...
Ngày tải lên: 06/03/2014, 19:20
Shaping Tomorrow’s Business Leaders: Principles and Practices for a Model Business Ethics Program ppt
... of short cases, scripting guidelines, and exercises GVV has over 150 pages of readings, cases, teaching plans, and annotated bibliographies and is still growing Business schools and business school ... courses in Business and Society and Professional Ethics and serves as the Founding Chair of Kansas State s Business Ethics Education Initiative Business Roundtable Institute for Corporate ... prepare future business leaders ethics course for accreditation academics on the “gold standard” for business ethics programs in leading business schools CSR, and sustainability •Highlights leading...
Ngày tải lên: 06/03/2014, 19:20
REBUILDING AMERICA’S DEFENSES Strategy, Forces and Resources For a New Century doc
... United States must In Southeast maintain and Asia, American tighten its ties forces are too with the Republic of Korea sparse to address and Japan In rising security Southeast Asia, requirements only ... although American armed forces possess capabilities and enjoy advantages that far surpass those of even our richest and closest allies, let alone our declared and potential enemies, the combination ... considered as pressing a mission as preparing for today s potential theater wars or constabulary missions – indeed, it must receive a significant, separate allocation of forces and budgetary resources...
Ngày tải lên: 07/03/2014, 10:20
Báo cáo " Oscilation and Convergence for a Neutral Difference Equation " pptx
... exists a positive constant A such that < zn A and so, by (24) we n→∞ have xn −ηxn−τ + A (25) Assume that {xn } is not bounded Then, there exists a subsequence {nk } of N, so that lim xnk = ∞ and ... Lalli and B G Zhang, Oscillation and comparison theorems for certain neutral delay difference equation, J Aus.tral Math Soc Vol 34 (1992) [7] B S Lalli, Oscillation theorems for certain neutral ... coefficients, Computers Math Applic Vol 33 (1997) [4] B S Lalli and B G Zhang and J Z Li, On the oscillation of solutions and existence of positive solutions of neutral delay difference equation, J Math...
Ngày tải lên: 14/03/2014, 13:20
Báo cáo " Boundedness and Stability for a nonlinear difference equation with multiple delay " docx
Ngày tải lên: 22/03/2014, 11:20
Báo cáo khoa học: "A Comparison of Head Transducers and Transfer for a Limited Domain Translation Application" pptx
... justification for this conclusion is that the systems were closely related, having identical sublanguage domain and test data, and using similar a u t o m a t a for analysis in the transfer system and transduction ... Proceedings of the 1992 AAAI Fall Symposium on Probabilistic Approaches to Natural Language, 89-97 References Alshawi, H and A. L Buchsbaum 1997 "StateTransition Cost Functions and an Application to Language ... There is also an inherent difficulty in evaluating the translation task: a single source utterance has many valid translations and the validity of translations is a matter of degree Despite this,...
Ngày tải lên: 24/03/2014, 03:21
Đề tài " Global existence and convergence for a higher order flow in conformal geometry" pptx
... ≥ 0, and M is not conformally equivalent to the standard sphere S C Fefferman and R Graham [14], [15] established the existence of a conn formally invariant self-adjoint operator with leading ... Phillips, and P Sarnak, Extremals of determinants of Laplacians, J Funct Anal 80 (1988), 148–211 [22] L Simon, Asymptotics for a class of nonlinear evolution equations, with applications to geometric ... Branson, S. -Y A Chang, and P Yang, Estimates and extremals for zeta function determinants on four-manifolds, Comm Math Phys 149 (1992), 241–262 [3] S. -Y A Chang and P Yang, Extremal metrics of zeta...
Ngày tải lên: 28/03/2014, 22:20
TOOLS AND EQUIPMENT FOR LAND DEVELOPMENT, TILLAGE AND SEEDBED PREPARATION pot
... DRAWN DISC HARROW Features The harrowconsistsof a frameand shaftson which discsare mounted.The shaftsare held in bearingsfor smoothrotation of discs.The shaftsare called gangson which discsare ... discsare arranged and equally spacedwith the help of spoo )s. Single gangand double gangdisc harrows are equally popular and operatedusing a pair of animals.The discs are fabricated from carbon steelsand ... bar and hitch assemblyis also attachedto it The shapeof the shareis similar to flat iron section with a tang and is held on the body with fasteners The share is usually fabricatedfrom used leaf...
Ngày tải lên: 31/03/2014, 12:20
Building the Knowledge Management Network Best Practices, Tools, and Techniques for Putting Conversation to Work
... kingdoms, empires, and nations We’d recorded what we knew in numbers, murals, essays, poems, songs, plays, novels, and libraries We’d managed to span deserts, seas, continents, and oceans with what ... drama, and biblical histories and the Psalms all describe human situations and express emotions to which we modern people can relate These stories began as oral accounts and were eventually translated ... first attempt at a grand index to knowledge and a precursor to the Dewey decimal system and today s online databases of books and information Conversation as a Basis for New Learning The oldest...
Ngày tải lên: 31/03/2014, 20:21
modeling with data tools and techniques for scientific computing oct 2008
... composed in 1972 Why use C instead of a specialized language or package like SAS, Stata, SPSS, S- Plus, SAGE, SIENA, SUDAAN, SYSTAT, SST, SHAZAM, J, K, GAUSS, GAMS, GLIM, GENSTAT, GRETL, EViews, ... problems always require a combination of database management and data analysis Neither database management systems nor traditional statistical packages are up to the task. The solution is to ... hand, but as computation goes, many stats packages are still relatively slow, and that slowness can make otherwise useful statistical methods infeasible R and Apophenia use the same C code for...
Ngày tải lên: 11/06/2014, 13:32
báo cáo hóa học: " Recruitment and retention of farm owners and workers for a six-month prospective injury study in New Zealand: a feasibility study" pdf
... participating farms may have increased safety awareness in these better resourced farms, leading to safety audits and interest in participating in studies such as this one This was corroborated ... Glasscock DJ, Hansen ON, Rasmussen K, Carstensen O, Lauritsen J: The West Jutland study of farm accidents: A model for prevention Safety Sci 1997, 25:105-112 Rasmussen K, Carstensen O, Lauritsen ... participation rates Care would have to be taken with this approach, as it may exacerbate any bias due to more safety-conscious farm owners and workers participating Retention of Farms and Workers Retention...
Ngày tải lên: 20/06/2014, 00:20
A must for Sales people and anyone who meets and greets for a livingThe 5 most POWERFUL & EFFECTIVE ppt
... fellow passenger on a bus or a salesperson in a store The bad feelings can easily be transferred onto others for just having the same look or name The good feelings the same thing How you want to ... both positively and negatively I am sure that you can as well One of the things that remain with us for years is that certain “FEELING” that we had when dealing with someone, whether it was a fellow ... course of your life you will come across thousands of people Many of them will be strangers that you pass by and never see again Do you think that they will remember you? Probably about as much as...
Ngày tải lên: 27/06/2014, 23:20
wiley interscience tools and environments for parallel and distributed computing phần 1 pptx
... efficient access to all system resources Users can share special purpose and sometimes expensive hardware and software resources such as database servers, compute servers, virtual reality servers, multimedia ... systems and applications Chapter 2: Message-Passing Tools This chapter briefly reviews message-passing models for network-centric applications It presents the advantages of message-passing tools ... software-based approaches to improve the performance of message-passing tools This is followed by an overview of existing message-passing tools such as socket-based message passing, p4, Parallel Virtual...
Ngày tải lên: 13/08/2014, 12:21
wiley interscience tools and environments for parallel and distributed computing phần 2 ppsx
... model Simplicity A message-passing system should be simple and easy to use Efficiency A message-passing system should be as fast as possible Fault tolerance A message-passing system should guarantee ... Portability A message-passing system should be easily portable to most computing platforms 2.4 CLASSIFICATION OF MESSAGE-PASSING TOOLS In this section we classify message-passing tools and discuss the ... is its performance 2.3 MESSAGE-PASSING SYSTEM: DESIRABLE FEATURES The desirable functions that should be supported by any message-passing system can be summarized as follows: 14 MESSAGE-PASSING...
Ngày tải lên: 13/08/2014, 12:21
wiley interscience tools and environments for parallel and distributed computing phần 3 pps
... increases linearly for small message sizes up to kB but shows different patterns when we increase message and group size The ACS primitive [ACS_mcast()] gives the best performance for various message ... platform and the heterogeneous environment The 32 SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S SUN W /S Hub SUN W /S SUN W /S SUN W /S SUN W /S Hub SUN W /S SUN W /S SUN ... corresponding message size The time was averaged over 100 iterations after discarding the best and worst timings As we can see from Figures 2.9 and 2.11, ACS outperforms other message-passing tools...
Ngày tải lên: 13/08/2014, 12:21
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