knowledge extraction from data It is one of the processes in the procedure for discovering new knowledge. It is a computational process that combines techniques from machine learning, statistics, and database architecture to find patterns in massive data sets.
What four tasks does data mining perform?Data mining mostly serves the following four purposes: prediction capability. the method of extracting patterns from data utilizing a number of variables to forecast other variables with unknown types or values. The process of searching a database for a crucial feature of data.
What methods of data mining are there?Some data mining techniques include classification, clustering, association, data cleaning, and data visualization.
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A lossless 100-Ω transmission line 3λ/8 in length is terminated in an unknown impedance. If the input impedance is Zin = 2.5 Ω, (a) Use the Smith chart to find Zi
Zin (s/c) = j45 was recorded as the input impedance when the circuit was terminated in a short circuit.
How does a Smith Chart's ZL location look?Find ZL/Z0 on the chart and draw a circle across it with the centre placed at 1+j0 to find Z along the line for that particular ZL. Points on that circle represent impedance on the line corresponding to distance which is read from the scale "wavelengths toward the generator".
How can one determine wavelength using a Smith Chart?The Wavelengths towards generator(WTG) scale is the outermost scale circling the Smith chart. It was built to indicate movement on the transmission line toward the generator, in wavelength units. Consequently, l is measured in wavelengths and in whole rotations.
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when conducting a cylinder leakage test, technician a says the piston must be at the top of the cylinder (tdc) when the test is being performed. technician b says a reading of 0 percent leakage indicates the piston rings are worn or broken. who is correct?
After conducting a cylinder leakage test, Technician A is correct.
What is a cylinder head?
The cylinder head serves as the ceiling of the combustion chamber in an internal combustion engine and is located above the cylinders. They are essential for managing fuel deployment and airflow into and out of the cylinders.
The engine valves are located in the cylinder head. Allowing air into and out of the cylinder is the main purpose of the engine valve. The cylinder head, which houses more moving parts than any other component of the engine, also houses the injectors and valves.
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A load of 120 + j 60 is connected to a source of 120 V with a phase angle of 30°, through a transmission line with an inductive reactance of 60 ohms. A Capacitor bank of a capacitive reactance of 60 ohms is connected in parallel to the load. Total reactive power supplied by the source to the line is:
To find the total reactive power supplied by the source to the line, we need to first calculate the total current flowing through the line.
How to use Ohm's law?We can do this by using Ohm's law to find the total resistance of the line, and then dividing the source voltage by the total resistance:
Total resistance = (120 + j60) / 120 V = 1 + j0.5 ohms
Total current = 120 V / (1 + j0.5 ohms) = 120 / (1.2 + j0.6) = 100 / 1.2 + j(-50) / 1.2 = 83.333 - 41.667j A
Next, we can use the total current and the source voltage to calculate the total reactive power supplied by the source to the line:
Total reactive power = (120 V) * (83.333 - 41.667j A) = 9960 - 5000j VAR
The total reactive power supplied by the source to the line is 9960 - 5000j VAR.
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Create a class called Car that includes three instance variables—a model (type
String), a year (type String), and a price (double). Provide a constructor that initializes the three
instance variables. Provide a set and a get method for each instance variable. If the price is not positive,
do not set its value. Write a test application named CarApplication that demonstrates class Car’s capabilities. Create two Car objects and display each object’s price. Then apply a 5% discount on the
price of the first car and a 7% discount on the price of the second. Display each Car’s price again.
Answer:
Here is the implementation of the Car class:class Car {
private String model;
private String year;
private double price;
public Car(String model, String year, double price) {
this.model = model;
this.year = year;
if (price > 0) {
this.price = price;
}
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
if (price > 0) {
this.price = price;
}
}
}
Here is the test application that demonstrates the capabilities of the Car class:class CarApplication {
public static void main(String[] args) {
Car car1 = new Car("Toyota", "2020", 20000);
Car car2 = new Car("Honda", "2019", 25000);
System.out.println("Original price of car1: $" + car1.getPrice());
System.out.println("Original price of car2: $" + car2.getPrice());
car1.setPrice(car1.getPrice() * 0.95);
car2.setPrice(car2.getPrice() * 0.93);
System.out.println("Discounted price of car1: $" + car1.getPrice());
System.out.println("Discounted price of car2: $" + car2.getPrice());
}
}
two structural elements with the same dimensions are compared. the structural element with a larger modulus of elasticity (e) isO heavier O less stiff O stiffer O less strong O stronger
The structural element with a larger modulus of elasticity (e) is stiffer. The modulus of elasticity is a measure of the stiffness of a material, and a larger modulus of elasticity indicates a stiffer material.
Stiffer means that the structural element with a larger modulus of elasticity will be less flexible and will be more resistant to deformation under load. It will also be able to support a greater load before reaching its yield point. On the other hand, the structural element with a smaller modulus of elasticity will be more flexible and will be more susceptible to deformation under load. It will also be able to support a smaller load before reaching its yield point.
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Let’s say you are setting up your ANOVA one-way analysis of variance graph. How many residual plots can you view at one time?
Select an answer:
two plots
one plot
five plots
three plots
Since a person is setting up ANOVA one-way analysis of variance graph. The amount of residual plots that they can view at one time is option D: three plots
What prerequisites must be met for a residual plot?A residual plot is a graph where the independent variable is on the horizontal axis and the residuals are displayed on the vertical axis.
Note that a linear regression model is adequate for the data if the residual plot's points are randomly distributed across the horizontal axis; otherwise, a nonlinear model is preferable.
So one can say that to verify an OLS linear regression model's assumptions, use residual plots. You run the danger of getting findings you cannot be able to rely on if you breach the assumptions. Residual plots show fitted values or another variable on the x-axis and the residual values on the y-axis.
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Type MC cable provides an effective ground-fault current path and is recognized by the NEC as an equipment grounding conductor when _____.
In accordance with 250.118(1), A MC cable includes an insulated or uninsulated equipment grounding conductor.
When does MC cable is recognized by the NEC as an equipment grounding conductor?
Type MC cable that provides an efficient ground-fault current path in compliance with one or more of the following is :
1. In accordance with 250.118(1).2. The interlocked metal tape-type MC cable's combined metallic sheath and uninsulated equipment grounding/bonding conductor that is listed and identified as an equipment.3. The smooth or corrugated tube-type MC cable's metallic sheath, or the combined metallic sheath and equipment grounding conductors, that is listed and identified as an equipment grounding conductor.To know more about MC cable, visit: https://brainly.com/question/14934410
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an amount p is deposited now so that an equal annual amount of a1=2000 per year for the first five years,starting one year after the deposit. and a different annual withdrawal of a2=3000 per year for the following three years ,draw the cash flow diagram if i=8.5% per year
The cash flow diagram is shown below:
Year Deposit Withdrawal Balance
0 P - P
1 - - P
2 - 2,000 P + 1,708.50
3 - 2,000 P + 3,571.51
4 - 2,000 P + 5,539.52
5 - 2,000 P + 7,614.45
6 - 3,000 P + 5,978.7
7 - 3,000 P + 4,037.48
8 - 3,000 P + 2,068.83
What is deposit ?
Placing cash with an organization, most frequently a financial institution like a bank, is known as making a deposit. The deposit is a credit again for person that made it, and it may be withdrawn in line with the terms agreed upon at the time of deposit, passed to some other party, or applied to a purchase at a later time.
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figure below shows a rudder mechanism used to steer ships. at the instant shown, the actuator is being extended at a constant rate of 0.1 m/s. determine the rotational velocity and acceleration of the rudder assembly.
The rotational velocity of the rudder mechanism to steer the ship is .1247 rad/sec.
What does rotational motion?Translational motion is when an object moves in a straight line, whereas rotational motion occurs when the same object moves in a circular route along an axis.
Briefing:1)here rotational velocity and acceleration of the rudder can be found by relative velocity and acceleration method with Coriolis component of acceleration
2)here let's draw a velocity diagram as follow with the scale of
2 cm=.1 m/s
velocity triangle is given by AB'B, where AB' shows slider velocity along horizontal, AB along the tangent to link 2 or guide, and velocity of pin BB' inside the guide along the length of the guide, here we know the velocity of AB' but don't know velocity AB and BB' hence draw them along given direction point of intersection is B point, so from the diagram, I get that
Vab'=2 cm=.1 m.s
Vbb'=.9 cm=.045 m/s
Vab=1.9 cm=.095 m/s
where rotational velocity is given by
Vab=Rab*wab
Rab=(.362+.7^2)^.5=.7615 m
wab=0.095/.7615=.1247 rad/s
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Select the word that best completes the sentence. Osha's standards require your employer to ensure that lighting, equipment, motors, machines, appliances, switches, controls and enclosures are constructed and installed to _____________ electrical dangers.
The word that best completes the sentence. is "MInimize"
Thus, Osha's standards require your employer to ensure that lighting, equipment, motors, machines, appliances, switches, controls, and enclosures are constructed and installed to MInimize electrical dangers.
What are OSHA Standards?OSHA standards are guidelines that specify how companies must safeguard their employees from dangers. OSHA rules are divided into four categories: general industry, building, maritime, and agriculture. (The General Industry set relates to the greatest number of people and workplaces.)
OSHA standards include requirements to provide protective clothing, prevent tunneling cave-ins, reduce exposure to some communicable diseases, guarantee the safety of workers entering confined spaces, prevent exposure to potentially harmful substances such as asbestos and lead, and install machine guards, among other things.
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Minitab: Suppose you own two pottery stores in your city. You want to find the number of two particular vase colors (color) sold in both stores (location) each week (for each week). You are not interested in the sum total. Which bar graph should you select to compare the data between both stores?
Select an answer:
Stacked Bar Chart
Cluster Bar Chart
Simple Bar Chart
Boxplot Chart
Where you own two pottery stores in your city and you want to find the number of two particular vase colors (color) sold in both stores (location) each week (for each week). If are not interested in the sum total, note that the bar graph you should select to compare the data between both stores is: the "Stacked Bar Chart" (Option A)
What is the advantage of the Stacked Bar Chart?When comparing data points, a stacked bar chart is generally simpler to notice the comparison than a combined chart.
When data points are stacked on top of each other, it is easier to discern the percentage of each data point relative to the total value.
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in the pseudo-nmos realization of a 2-input nor gate, the pull-down network is realized using minimum size transistors (2/4). the l/w ratio of the pmos transistor should be:
The I/w ratio is the ratio of the current flowing through a transistor to the width of the transistor's channel.
What should be the ratio?The l/w ratio of the PMOS transistor in a pseudo-NMOS realization of a 2-input NOR gate should be determined by the design requirements of the circuit.
In general, the l/w ratio of a PMOS transistor is determined by the desired current-carrying capability and the voltage drop across the transistor. For a 2-input NOR gate, the PMOS transistor in the pull-up network should be designed to provide sufficient current to drive the output high, while the PMOS transistors in the input stages should be designed to have a low on-resistance to minimize the voltage drop across them.
The exact l/w ratio will depend on the specific design requirements of the circuit.
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Can you find thevenin equivalent for this example?
With the load impedance open-circuited, the Thevenin voltage is calculated. Find the voltage at the load terminals that is open-circuit.
Explaining Thevenin's TheoremThevenin's Theorem: What is it? According to Thevenin's Theorem, any linear circuit can be made simpler by using a single dc voltage and a series resistance, regardless of how complex it is.
What are Thevenin's theorem's benefits?It makes the less crucial section of the circuit simpler and makes it possible for us to see the output part's operation in real time. It simplifies a complicated circuit by putting one emf source in series with one resistance.
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given the instruction set for marie: write the assembly language equivalent for the machine instruction: 1000 100000000000 (8800).
The appropriate machine instruction in assembly language for the Skipcond 800 given the following instruction set.
Is machine code the same as assembly?The primary distinction between assembly language and machine code is that the latter is a low-level programming language that needs an assembler to translate it into machine code. Machine code, on the other hand, is a language made up of binaries that can be run by computers directly.
Does binary correspond to machine language?The most basic form of information stored in a computer system is binary information, which is also frequently referred to as machine language. Physically speaking, a computer system's central processing unit stores the 0s and 1s utilizing.
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say there is a b -tree primary index on a relation r. since an insert or a delete into r changes the index as well, we must take locks on the index during updates. briefly explain what kind of locks you would take on the index pages when doing an insert or a delete into the relation. remember a page split or merge may involve the ancestors and the siblings of a node.
Any subnode of a given node is called a child node, and the given node, in turn, is the child's parent.
What is ancestor node?Beginning with the parent node and continuing through to the root node, the ancestor axis displays all of the context node's ancestors. Exactly like Following-Siblings, this idea is a notion. Functionality-wise, the only change is what came before. In this case, as opposed to Following-Sibling, you receive information on all the nodes that are siblings or on the same level as your present node but are located earlier in the tree. We must use xpath's following-sibling idea in order to navigate to the subsequent sibling. Through the current sibling of the same parent, we can then move on to the following sibling.To learn more about ancestor node refer to:
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in a linkage-operated clutch system, technician a says the need for free play adjustment may be due to a worn clutch plate. technician b says the free play should be adjusted at the pedal pushrod which is usually under the dash. who is correct?
Answer: Technician B is correct.
In a linkage-operated clutch system, the free play should be adjusted at the pedal pushrod which is usually under the dash.
Clutch slip will occur if there is insufficient free play (or clearance), as the pressure plate won't be able to fully press against the friction plate. If this problem isn't fixed right away, a burned-out friction plate and potentially a damaged pressure plate will result.
What is Clutch Operated Linkage?
A stiff component of the flywheel and consequently the crankshaft assembly is the clutch unit.
As a result, it experiences vibrations from the engine and transmission as rocking, shaking, and pitching.
On the other hand, the clutch foot-pedal assembly is fastened to the body framework. As a result, the body may experience minor bumps and rebound motions.
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You need to replace a fiber optic cable that is connecting two switches together. You inspect the existing fiber cable and determine that it uses LC connectors. You also notice the cable's ferrule has a slight slant to it. Which polish grade should you use to replace the existing cable?
Angled Physical Contact polish
So, To replace the fiber optic cable that connects two switches. If it is found that the existing fiber cable to ensure it has LC connectors and also if the cable's ferrule has a slight slant to it.
Angled Physical Contact polish should be used to replace the existing cable.
What is Angled Physical Contact polish?
APC Connector is a type of fiber connector that reduces back-reflection by applying a 5° to 15° angle-polish to the end faces.
Because of the angle, the reflected light escapes into the cladding rather than remaining in the fiber core.
Angled connectors should only be mated with other angled connectors. When mated to a non-angle polished connector, insertion loss is extremely high. Angle-polished connectors typically have a higher insertion loss than good quality straight physical contact connectors.
When connected, "Ultra" quality connectors may achieve back reflection comparable to an angled connector, but an angled connection maintains low back-reflection even when the output end of the fiber is disconnected.
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Write an Assembly language program that queries an integer (1 s k s 365) from the keyboard in a loop. Then calculates and displays information about what will be the next day of the year: Saturday, Sunday or working day, if January 1: 1) Monday; 2) b) the d-th day of the week (if January 1 is Monday, then d = 1 if Tuesday = 2,..., if Sunday -d = 7). The input ends when you press the EЅС key.
Answer:
This program uses the int 16h interrupt to query an integer from the keyboard and store it in the al register. The program then enters a loop, in which it calculates the next day of the week using the add, mov, div, and cmp instructions, and displays the appropriate message using the int 21h interrupt. The program exits the loop and ends when the user presses the ESC key (ASCII code 27).