Posts (page 216)
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10 min readBacktests are simulations that use historical data to test investment strategies, such as buying and selling stocks. While backtests can provide valuable insights into how a strategy would have performed in the past, they are not always accurate predictors of future stock performance.There are several reasons why backtests may not accurately predict future performance. Market conditions can change, impacting stock prices in ways that may not be reflected in historical data.
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4 min readWhen looking for a photo scanner, it is important to consider several key features that can impact the quality and ease of scanning.One of the most important features to look for is the scanner's resolution, which determines the level of detail and sharpness in the scanned image. Higher resolutions generally result in better quality scans.Additionally, consider the type of scanning technology the device uses.
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7 min readIf you need to borrow money for educational expenses, you may consider getting an installment loan. An installment loan allows you to borrow a specific amount of money and pay it back in fixed monthly payments over a set period of time. To get an installment loan for educational expenses, you will need to apply with a lender and provide information about your income, credit history, and the specific expenses you need the loan for.
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7 min readThe timeframe for stock backtesting typically depends on the specific trading strategy being tested and the goals of the investor. However, it is generally recommended to go back at least 5-10 years to capture different market conditions and economic cycles. Some investors may choose to go even further back in time to analyze long-term trends and performance.
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7 min readThere are several types of photo scanners available on the market, each with its own unique features and capabilities. Some common types include flatbed scanners, sheetfed scanners, and portable scanners.Flatbed scanners are the most commonly used type of photo scanner and are typically larger in size. They consist of a flat glass surface on which the photo or document is placed for scanning.
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8 min readWhen facing the unexpected costs of funeral expenses, one option to consider is obtaining an installment loan. To do this, you can start by researching lending institutions that offer personal loans with flexible repayment terms. It is important to compare interest rates, fees, and eligibility requirements before applying.
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5 min readBacktesting in stock trading is a valuable tool for evaluating trading strategies by using historical data. However, there are limitations to backtesting that traders should be aware of. One limitation is the reliance on past data, which may not accurately reflect future market conditions. Backtesting also does not account for unexpected events or market disruptions that could impact the performance of a trading strategy.
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6 min readTo count the number of multiplies in a TensorFlow model, you can use the TensorFlow Graph Analysis tool. This tool allows you to visualize and analyze the computational graph of your model, including the number of multiply operations performed. By examining the nodes in the graph and identifying the multiply operations, you can determine the total number of multiplies in your model.
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6 min readA photo scanner works by using a combination of sensors and light sources to capture an image of a photograph or document. When a photo is placed on the scanner bed, the sensors gather information about the colors and details of the image. The scanner then uses a light source to illuminate the photo, allowing the sensors to capture a digital representation of the image.
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8 min readIf you need a loan to cover legal fees, an installment loan may be a good option. To get an installment loan for legal fees, you will need to research different lenders and their loan options. Look for lenders who specialize in personal loans or offer loans for specific purposes like legal fees.When applying for an installment loan for legal fees, you will need to provide information about your income, employment history, credit score, and the specific legal expenses you need to cover.
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7 min readThe common metrics used to evaluate backtest performance include Sharpe ratio, maximum drawdown, average annual return, and volatility. The Sharpe ratio measures the risk-adjusted return of an investment strategy, with higher values indicating better risk-adjusted performance. Maximum drawdown measures the largest peak-to-trough decline in equity during the backtest period. Average annual return is a simple measure of the average annualized return of the strategy.
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6 min readTo find the minimum of a function with TensorFlow, you can use TensorFlow's built-in optimization algorithms such as SGD (Stochastic Gradient Descent) or Adam. First, define your function as a TensorFlow computational graph using placeholders for input variables. Then, use TensorFlow's optimizer to minimize the function with respect to the input variables. You can specify the learning rate and other hyperparameters to control the optimization process.