how good are they
Understanding test and exam results statistically
Ngày tải lên :
13/08/2016, 09:04
... statistics are good But, that is not the whole truth, there are bad statistics That is why there are such interesting titles as these: Huff, D (1954) How to Lie with Statistics; Runyon, R.P (1981) How ... statistics are those unintentionally misused A rational approach to statistics, noting that they can be good or bad, is to follow Joel Best’s advice: Some statistics are bad, but others are pretty good, ... liars use statistics.” Obviously, there are good statistics and there are bad statistics, and we need to be able to differentiate between them Good statistics are the kind of numbers which simplifies...
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FOUNDATION OF COGNITIVE RADIO SYSTEMS ppt
Ngày tải lên :
28/06/2014, 17:20
... These limiting laws are valid for large numbers of sensors and samples and are not able to characterize detection performance when the number of sensors and the sample size are small On the other ... Chi-square distribution and under H1 it follows a non-central Chi-square distribution (Digham et al., 2003) For the ER detector, asymptotical condition number distributions under both hypotheses are ... On the other hand, due to the complexity of the exact results, they are most useful when the number of sensors and sample size are small In order to characterize the detection performance in...
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Foundation of BizTalk Server 2006
Ngày tải lên :
21/08/2012, 09:28
... environment These are valid points However, more and more, companies are beginning to find value in a service-oriented architecture (more of that in Chapter 4) Having the infrastructure geared toward ... their business processes, they become excited at what the product will enable them to They re able to connect a broader range of software to a central location, as shown in Figure 1-2 7753c01FINAL ... must also adhere to a specified structure If they follow the rules and are well formed, they pass validation For instance, let’s suppose that you are submitting a product order to a business-to-business...
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A methodology for validation of integrated systems models with an application to coastal-zone management in south-west sulawesi
Ngày tải lên :
06/11/2012, 10:35
... environment? Are they useful and they have an added value in comparison with conventional process models? Centred in these questions are the two questions: What is the validity of an ISM? How can ... as the preceding results, they are positive feedback; their effects are cumulative If the new data produce a result in the opposite direction to previous results, they are negative feedback; their ... there are inputs and outputs The inputs are the result of the environment's influence on the system, and the outputs are the influence of the system on the environment Input and output are separated...
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THE EFFECT OF EDUCATION ON ECONOMIC master sciences po fr
Ngày tải lên :
24/08/2013, 18:40
... Table show that, first of all, the results are overall more significant with Barro-Lee’s database rather than with Cohen-Soto’s one, but both are significant when taking all the countries , showing ... deviation in GDP per capita across countries belonging to the same class are the highest in classes 1b and 2a, showing that those are very heterogenous groups that may have very different realities ... of this study are: • The returns to schooling are much below those reported by the previous literature • The log wage regression is found to be convex in schooling Local returns are very low until...
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Sanitation in Urban Poor Settlement and the Importance of Education for the Reduction of the Diffused Pollution - A Case Study of Bauniabad, Bangladesh
Ngày tải lên :
05/09/2013, 09:08
... the cost sharing It can be good examples that though people are poor living less than US dollar per day, they accept to pay for it when they understand the option is good for them Performance ... impossible for the local people to share all of the expensive installation costs However, they have gradually increased the proportion of the installation cost share This is because the people were ... Journal of Water and Environment Technology, Vol.3, No.2, 2005 condition though they are poor The following points are considered as the factors of the improvement; i) hygiene education in combination...
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Increasing energy efficiency of HVAC systems of buildings using phase change material
Ngày tải lên :
05/09/2013, 15:28
... 3's inlet vents are designed to have the same total inlet vent area as Case and There are six inlet vents on the floor Hence, the Case inlet vents are 6" × 9", which gives an area of 2.25 ft2 ... inlet vent area compared to Case 1, Case meets the ASHRAE guidelines of air movement in the room The six inlet vents are placed on the floor near the adiabatic walls The outlet vent area of Case ... inlet and outlet dimensions of the vents are 9" × 36" (0.2286 m × 0.9144 m) spaced 12" (0.3048 m) off of the rear wall as shown in Figure 4, which gives an area of 2.25 ft2 (0.2090 m2) for each...
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Diffusion of photovoltaic systems for rural electrification in Thailand
Ngày tải lên :
05/09/2013, 16:10
... “Institutions are the rules of the game in a society or, more formally, are the humanly devised constraints that shape human interaction … Institutions are a creation of human beings They evolve and are ... it can also be psychologically e.g changing habits Anyhow, experiences from this project are valuable as it shows good practices and also show what could have been improved Acknowledgements Great ... systems OBEC and ONIE are the receivers of the PV systems OBEC and ONIE have the same roles but they are responsible for different learning centers Teachers at learning centers are working under...
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Technology and market future prospects of photovoltaic systems
Ngày tải lên :
05/09/2013, 16:10
... These groups of cells are packaged into standard modules that protect the cells from the environment PV modules are extremely reliable since they are solid state and there are no moving parts cell ... and then into wafers Multicrystalline cells are cheaper to manufacture than monocrystalline ones due to the simpler manufacturing process However they are slightly less efficient than the monocrystalline ... the area of telecommunications Modern telecommunications show an increased need for decentralization and low power consumption [16] PV modules are used to power emergency telephones in remote areas...
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Theory and design of CNC systems (Học CNC)
Ngày tải lên :
08/09/2013, 20:50
... control Figure 1.13 shows the conceptual architecture of CNC machine tools from the hardware and software points of view Software MMI NCK Machine parameter Diagnosis Hardware Part Programming ... 8.1.1 Area for Status Display 8.1.2 Area for Data Input 8.1.3 Area for MPG Handling 8.1.4 Area for ... can be summarized as shown in Fig 1.18 NC systems developed in the 1950s were implemented based on hardware and research for replacing the hardware components with software components got under...
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The Foundation of JSF- Components
Ngày tải lên :
19/10/2013, 00:20
... note that a parent component can contain only one child component per named facet, but the same parent component can contain many indexed child components Code Sample 1-13 shows how to add a ... Figure 1-14) to ensure that no children are rendered to the buffer until the parent has closed the loop on its children Once the parent knows about its children, they will be rendered to the ... in a Web application Navigation rules in JSF are defined inside the JSF configuration file, faces-config.xml, and are page-based Code Sample 1-1 shows a navigation rule configured in faces-config.xml...
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Fundamentals of database systems 6ed
Ngày tải lên :
07/12/2013, 11:33
... languages, and discusses how XML is related to database systems It presents XML concepts and languages, and compares the XML model to traditional database models We also show how data can be converted ... which cover conceptual modeling using the ER and EER models, are important for a good conceptual understanding of databases However, they may be partially covered, covered later in a course, or ... Warehouses 1070 Building a Data Warehouse 1075 Typical Functionality of a Data Warehouse 1078 Data Warehouse versus Views 1079 Difficulties of Implementing Data Warehouses 1080 Contents 29.8 Summary...
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Tài liệu Integration and Automation of Manufacturing Systems pdf
Ngày tải lên :
22/12/2013, 20:17
... keyboard commands If other disks are used, such as a CDROM, or floppy disk, they are mounted under the root directory (i.e., there are no ‘C’, ‘A’ or other drives, they are all under ‘/’.) (Note: the ... administer the system, they are often faster and more reliable Commands can be typed in a command window Typed commands are case sensitive, and most commands are lower case Spaces are used to delimit ... directories are of interest to the system administrator /etc - device and software configuration files are kept here /tmp - temporary files are created here page 30 /home - user directories are kept...
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Tài liệu 78 Rapid Design and Prototyping of DSP Systems docx
Ngày tải lên :
25/12/2013, 06:16
... elements of the defined architecture are refined to create hardware virtual prototypes Hardware virtual prototypes are defined as software simulatable models of hardware components, boards, or systems ... translation of software architecture specifications to design implementations of application and control software for a signal processing system Hardware/software architectures are presented to the ... software prototyping Various parametric studies based on historical project data show that software is difficult to design and test if “slack” margins for hardware CPU and memory resources are...
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Analysis and design of control systems using MATLAB
Ngày tải lên :
01/01/2014, 18:43
... Computes the square root of x Rounds x to the nearest integer Rounds (or truncates) x to the nearest integer toward Rounds x to the nearest integer toward – ∞ Rounds x to the nearest integer toward ... also see how to program logic constructs and loops in MATLAB, how to use subprograms and functions, how to use comments (%) for explaining the programs and tabs for easy readability, and how to ... not have any nodes in common Nontouching: Two loops are nontouching if these loops have no nodes in common A loop and a path are nontouching if they have no nodes in common Nontouching-Loop Gain:...
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Reliability assessment of power systems considering reactive power sources
Ngày tải lên :
03/01/2014, 19:39
... reliability parameters for each generator and condenser are shown in Table A1 The reliability parameters of the transmission lines are shown in Table A2 Annual constant load is used in analysis ... The proposed annual load point and system EVNSQ and EVarS are also calculated and the results are shown in Table The EVarS results show that the voltage violations caused by Var shortage can ... ground There are static and dynamic Var compensators in power systems A basic dynamic Var generation arrangement using a fixed capacitor with a thyristor-controlled inductor is shown in Fig.3...
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03 analysis of mechanical systems using interval computations applied to finite element methods o dessombz
Ngày tải lên :
12/01/2014, 21:45
... take into account the way the matrices are built for mechanical problems In fact, the terms of the matrices are not independent from each other, since they are calculated from the same parameters, ... parameters CONCLUSION The vibrating systems are often modeled with a Finite Element Method When they are depending on uncertain and bounded parameters, they can be studied thanks to the interval ... matrices, that not exactly correspond to mechanical cases, and are more appropriate for the treatment of numerical uncertainties as they are not well suited for dealing with large uncertainties Another...
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22 global optimization for parameter estimation of dynamic systems lin chinese 2005
Ngày tải lên :
12/01/2014, 22:03
... development of mathematical models • Models of interest may be ODEs/DAEs • Minimization of a weighted squared error r φ = θ,z µ s.t (zµ,m − zµ,m )2 ¯ m∈M µ=1 ˙ z = f (z, θ, t), z(t0 ) = z θ∈Θ z µ = z(tµ...
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Global optimization for parameter estimation of dynamic systems lin chinese 2005
Ngày tải lên :
12/01/2014, 22:16
... development of mathematical models • Models of interest may be ODEs/DAEs • Minimization of a weighted squared error r φ = θ,z µ s.t (zµ,m − zµ,m )2 ¯ m∈M µ=1 ˙ z = f (z, θ, t), z(t0 ) = z θ∈Θ z µ = z(tµ...
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