Learn feature-engineering-importance course free

**Feature engineering** is a crucial step in the data science and machine learning pipeline. It involves creating, selecting, and transforming variables (features) from raw data to improve the performance of predictive models. --- ### 🔍 **Why Feature Engineering Is Important** 1. **Boosts Model Accuracy** * Raw data often isn't in the best format for algorithms. Feature engineering helps create features that better capture the patterns in the data, leading to higher accuracy. 2. **Reduces Overfitting** * Carefully engineered features can reduce noise and help models generalize better. 3. **Improves Interpretability** * Good features help make model outputs easier to understand and explain, especially in linear models or decision trees. 4. **Makes Models Work with Less Data** * With well-crafted features, you can often get better performance even with smaller datasets. --- ### 🔧 **Types of Feature Engineering** 1. **Feature Creation** * Combine or transform raw features to create new ones. * Example: From date `2023-06-30`, create `day_of_week`, `month`, etc. 2. **Feature Transformation** * Modify features to better suit model requirements. * Log-transform skewed data, normalize, standardize. 3. **Feature Selection** * Choose the most relevant features and discard irrelevant or redundant ones. * Techniques: correlation analysis, mutual information, recursive feature elimination. 4. **Handling Categorical Variables** * Convert non-numeric data into numerical form. * One-hot encoding, label encoding, target encoding. 5. **Handling Missing Values** * Impute missing data using mean, median, mode, or more complex methods like KNN imputation. --- ### 🧠 **Feature Engineering in Action: Example** Suppose you’re building a model to predict house prices. **Raw Features:** * `Date sold` * `Number of rooms` * `Zip code` **Engineered Features:** * `House age` = Current year - Year built * `Is weekend sale` = 1 if `Date sold` is Saturday/Sunday * `Average price in zip code` (external or grouped feature) These engineered features often carry more predictive power than the raw inputs alone. --- ### ⚠️ **Things to Watch Out For** * **Data Leakage:** Don’t use future information to create features. * **Overengineering:** Too many or overly complex features can cause overfitting. * **Scaling Issues:** Ensure numerical features are properly scaled when needed (especially for distance-based models). --- Would you like a practical tutorial or notebook to try out feature engineering hands-on? click link

विजयदुर्ग क्या है

विजयदुर्ग क्या है Ans.छत्रपति शिवाजी का नौसैनिक अड्डा

The power of Determination/ दृढ़ संकल्प की शक्ति

The little country schoolhouse was heated by an old-fashioned, pot-bellied coal stove. A little boy had the job of coming to school early each day to start the fire and warm the room before his teacher and his classmates arrived. One morning they arrived to find the schoolhouse engulfed in flames. They dragged the unconscious little boy out of the flaming building more dead than alive. He had major burns over the lower half of his body and was taken to the nearby county hospital From his bed the dreadfully burned, semi-conscious little boy faintly heard the doctor talking to his mother. The doctor told his mother that her son would sorely die which was for the best, really for the terrible fire had devastated the lower half of his body But the brave boy didn't want to die He made up his mind that he would survive Somehow, to the amazement of the physician, he did survive. When the mortal danger was past, he again heard the doctor and his mother speaking quietly. The mother was told that since the fire had destroyed so much flesh in the lower part of his body, it would have been better if he had died, since he was doomed to be a lifetime cripple with no use at all of his lower limbs Once more the brave boy made up his mind. He would not be a cripple. He would walk. But unfortunately from the waist down, he had no motor ability His thin legs just dangled there, all but lifeless Ultimately, he was released from the hospital. Every day his mother would massage his hule legs, but there was no feeling, no control, nothing. Yet his determination that he would walk, was as, strong as ever When he wasn't in bed, he was confined to a wheelchair. One sunny day his mother wheeled him out into the yard to get some fresh air. This day, instead of sitting there, he threw himself from the chair He pulled himself across the grass, dragging his legs behind him He worked his way to the white picket fence bordering their lot. With great effort, he raised himself up on the fence Then, stakeby stake, he began dragging himself along the fence, resolved that he would walk. He started to do this every day until he wore a smooth path all around the yard beside the fence. There was nothing he wanted more than to develop life in those legs. Ultimately, through his daily massages, his iron persistence and his resolute determination, he did develop the ability to stand up, then to walk haltingly, then to walk by himself - and then - to run. He began to walk to school, then to run to school, to run for the sheer joy of running. Later in college he made the track team. Still later in Madison Square Garden, this young man who was not expected to survive, who would surely never walk, who could never hope to run - this determined young man, Dr. Glenn Cunningham, ran the world's fastest mile! छोटे से देहाती स्कूल में पुराने जमाने के, पेट-भरे कोयले के चूल्हे से गर्मी पैदा की जाती थी। एक छोटे लड़के को हर दिन सुबह जल्दी स्कूल आकर आग जलाकर कमरे को गर्म करना होता था, उसके शिक्षक और सहपाठियों के आने से पहले। एक सुबह वे स्कूल पहुंचे तो पाया कि स्कूल में आग लगी हुई थी। उन्होंने बेहोश छोटे लड़के को जलती हुई इमारत से बाहर निकाला, जो ज़िंदा नहीं बल्कि मृत अवस्था में था। उसके शरीर के निचले आधे हिस्से में गंभीर जलन थी और उसे पास के काउंटी अस्पताल ले जाया गया अपने बिस्तर से बुरी तरह जले हुए, अर्ध-चेतन छोटे लड़के ने डॉक्टर को उसकी माँ से बात करते हुए सुना। डॉक्टर ने उसकी माँ से कहा कि उसका बेटा बुरी तरह मर जाएगा, जो कि सबसे अच्छा था, वास्तव में भयानक आग ने उसके शरीर के निचले आधे हिस्से को तबाह कर दिया था लेकिन बहादुर लड़का मरना नहीं चाहता था उसने मन बना लिया कि वह बच जाएगा किसी तरह, चिकित्सक के आश्चर्य के लिए, वह बच गया। जब जानलेवा खतरा टल गया, तो उसने फिर से डॉक्टर और उसकी माँ को धीरे से बात करते हुए सुना। माँ को बताया गया कि चूँकि आग ने उसके शरीर के निचले हिस्से में बहुत सारा मांस नष्ट कर दिया था, इसलिए बेहतर होता कि वह मर जाता, क्योंकि वह जीवन भर अपंग रहने के लिए अभिशप्त था और उसके निचले अंग किसी काम के नहीं थे एक बार फिर बहादुर लड़के ने अपना मन बना लिया। वह अपंग नहीं होगा। वह चलेगा। लेकिन दुर्भाग्य से कमर से नीचे, उसके पास कोई मोटर क्षमता नहीं थी। उसके पतले पैर बस लटक रहे थे, बिल्कुल बेजान आखिरकार, उसे अस्पताल से छुट्टी मिल गई। हर दिन उसकी माँ उसके पतले पैरों की मालिश करती, लेकिन कोई एहसास नहीं था, कोई नियंत्रण नहीं था, कुछ भी नहीं। फिर भी उसका दृढ़ संकल्प कि वह चलेगा, पहले की तरह ही मजबूत था जब वह बिस्तर पर नहीं होता था, तो वह व्हीलचेयर तक ही सीमित रहता था। एक धूप वाले दिन उसकी माँ उसे ताज़ी हवा लेने के लिए यार्ड में ले गई। इस दिन, वहाँ बैठने के बजाय, उसने खुद को कुर्सी से नीचे फेंक दिया। वह खुद को घास पर खींचता हुआ, अपने पैरों को अपने पीछे खींचता हुआ वह अपने लॉट की सीमा पर सफ़ेद पिकेट बाड़ तक पहुँच गया। बहुत प्रयास के साथ, उसने खुद को बाड़ पर खड़ा किया और फिर, एक-एक खूंटे को जोड़कर, खुद को बाड़ के साथ घसीटना शुरू कर दिया, उसने निश्चय किया कि वह पैदल ही चलेगा। उसने ऐसा हर दिन करना शुरू कर दिया जब तक कि बाड़ के पास यार्ड के चारों ओर एक चिकना रास्ता नहीं बन गया। वह अपने पैरों में जान डालने से ज़्यादा कुछ नहीं चाहता था। अंततः, अपनी दैनिक मालिश, अपनी दृढ़ दृढ़ता और अपने दृढ़ निश्चय के माध्यम से, उसने खड़े होने, फिर रुक-रुक कर चलने, फिर खुद चलने - और फिर - दौड़ने की क्षमता विकसित की। वह स्कूल जाने के लिए पैदल चलने लगा, फिर स्कूल जाने के लिए दौड़ने लगा, दौड़ने के आनंद के लिए दौड़ने लगा। बाद में कॉलेज में उसने ट्रैक टीम बनाई। अभी भी बाद में मैडिसन स्क्वायर गार्डन में, यह युवक जिसके बचने की उम्मीद नहीं थी, जो निश्चित रूप से कभी नहीं चल पाएगा, जो कभी दौड़ने की उम्मीद नहीं कर सकता था - इस दृढ़ निश्चयी युवक, डॉ. ग्लेन कनिंघम ने दुनिया का सबसे तेज़ मील दौड़ा!

Solutions for storing water

Water storage is a crucial aspect of water management, especially in areas that face irregular rainfall, droughts, or water scarcity. Effective water storage helps ensure a steady supply for domestic, agricultural, industrial, and environmental needs. There are several traditional and modern methods for storing water, and these can be broadly categorized into natural and artificial systems. 1. Surface Water Storage Reservoirs and Dams: These are large structures built across rivers to store vast quantities of water. Dams help in flood control, irrigation, and hydroelectric power generation. The water collected in reservoirs can be used during dry periods. Lakes and Ponds: Natural or man-made lakes and ponds act as surface water storage. They collect rainwater and runoff, serving communities and ecosystems. They are relatively inexpensive and can be built locally for agricultural use. Rainwater Harvesting Systems: This involves collecting rainwater from rooftops or other surfaces and storing it in tanks, cisterns, or underground reservoirs. It is a sustainable method that reduces dependency on groundwater and municipal supply, especially in urban areas. 2. Groundwater Storage Aquifers: These are underground layers of water-bearing rock or sediment. Water seeps into these layers from the surface and can be extracted using wells and boreholes. Artificial recharge methods such as percolation tanks, recharge pits, and injection wells are used to enhance groundwater levels. Infiltration Ponds and Basins: These structures help water to percolate into the ground and replenish aquifers. They are often used in areas with high rainfall or near rivers to capture floodwaters. 3. Domestic Water Storage Tanks and Cisterns: In homes, water is stored in plastic, concrete, or metal tanks for daily use. Overhead tanks are common in urban households, while underground cisterns can store larger quantities and keep water cool. Barrels and Containers: For small-scale storage, especially in rural or remote areas, people use barrels, jugs, or clay pots. These are often used to store water collected from wells or rainwater systems. 4. Agricultural and Industrial Storage Farm Ponds and Check Dams: These are small-scale storage systems used by farmers to capture runoff water. Check dams are low barriers built across small streams to slow water flow and promote infiltration. Industrial Reservoirs: Factories and industrial plants often build large reservoirs or use treated wastewater systems to store and reuse water for processes like cooling and cleaning. 5. Innovative and Modern Technologies Modular Water Storage Systems: These are prefabricated tanks that can be installed quickly in urban spaces. They can be customized for space and volume requirements. Smart Water Storage: These systems use sensors and automation to monitor water levels, usage, and quality in storage units. They are increasingly used in smart cities for efficient water management. In conclusion, water storage methods vary depending on the region, climate, purpose, and resources available. Combining traditional wisdom with modern technology offers the most resilient and sustainable approach to water security. Proper storage not only ensures water availability during shortages but also helps in managing floods, improving agricultural productivity, and promoting environmental conservation.

Patience is the key to success

Success is often seen as the result of hard work, intelligence, and determination. While these qualities are indeed essential, one crucial trait that is frequently overlooked is patience. In a world driven by instant gratification and quick results, patience has become a rare virtue. However, it is this very quality that often separates those who succeed in the long run from those who give up too soon. Patience can be defined as the ability to wait calmly for something to happen without becoming frustrated or anxious. It means enduring difficulties, delays, and setbacks without losing hope or motivation. Every successful person, whether in business, sports, education, or personal life, has encountered obstacles. What distinguishes them is not that they had an easier path, but that they remained patient and persistent even when success seemed distant. One of the key reasons patience is so important is because meaningful success takes time. Whether it’s building a career, learning a skill, or growing a business, achievements do not happen overnight. For example, a student working towards a degree spends years studying and preparing. An entrepreneur may face multiple failures before their business finally takes off. In all these cases, patience allows individuals to keep going despite the slow pace or initial disappointments. Moreover, patience helps in making better decisions. When people rush, they often act impulsively, leading to mistakes that could have been avoided. A patient person, on the other hand, takes time to analyze situations, consider options, and make thoughtful choices. This approach increases the likelihood of long-term success because it is based on wisdom and foresight rather than haste. In relationships and teamwork, patience is equally essential. Understanding others, resolving conflicts, and building trust require time and consistent effort. A patient person is better able to listen, empathize, and support others, which creates stronger bonds and more effective collaboration—both of which are crucial for success in any group or professional setting. Furthermore, patience helps maintain mental and emotional well-being. The journey to success is often filled with stress and uncertainty. Patience acts as a buffer, helping individuals stay calm and focused. It allows them to accept that not everything is in their control and to keep working steadily toward their goals. That said, patience does not mean passivity. It is not about doing nothing and waiting for results to magically appear. Rather, it is about maintaining consistent effort while understanding that progress may be slow. It’s about trusting the process, even when immediate results are not visible. In conclusion, patience is a powerful tool that supports every other success-related trait. It gives people the strength to persevere, the wisdom to make better choices, and the emotional resilience to stay focused under pressure. In a fast-paced world that rewards speed, those who master the art of patience often find deeper, more lasting success.

Mobile Earning

Great — “Mobile earning” generally refers to making money using a smartphone or tablet. Here are popular and legitimate ways to earn income from your mobile device in 2025: 🔹 1. Freelancing Apps If you have a skill (writing, design, coding, translation, etc.), use freelancing platforms with mobile apps: Fiverr Upwork Freelancer Toptal (for experts) 🧠 Tip: Build a great profile and focus on one niche to grow faster. 🔹 2. Content Creation Use your mobile to create and share videos, photos, or blog content. YouTube (monetize videos) TikTok Creator Fund Instagram Reels bonuses Medium (write and earn via their Partner Program) Substack (for newsletters) 📱 Tools: You can film, edit, and publish everything from your phone. 🔹 3. Online Surveys & Tasks These don’t pay much, but they’re easy: Swagbucks Toluna Google Opinion Rewards InboxDollars Remotasks or Clickworker (simple microtasks) 💸 Warning: Stick to known platforms — many scam apps exist. 🔹 4. Sell Items Online Use your phone camera to take photos and sell: eBay, OLX, Facebook Marketplace Poshmark (for clothes) Etsy (handmade/crafts) Meesho or Shopify (start a small business) 🔹 5. Stock Market & Crypto Apps Investing through your mobile can generate income, but it has risks: Robinhood eToro Coinbase Binance Groww / Zerodha (India) 📉 Note: Learn the basics of investing before diving in. 🔹 6. Teach or Tutor Online If you're good at a subject: Chegg Tutors Cambly (teach English) Preply Vedantu / Byju’s (India) You can manage sessions from your mobile and get paid weekly or monthly. 🔹 7. Affiliate Marketing Promote products using your social media or blog: Amazon Associates Impact ShareASale Digistore24 ClickBank 🧩 Create content + links, then earn commission on purchases. Would you like suggestions tailored to your country, skills, or daily availability? I can help you choose what fits best. click link 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇 Attach Search Reason Voice

how to impress a girl

You said: how to impress a girl ChatGPT said: Impressing a girl isn't about grand gestures or changing who you are—it's about being genuine, respectful, and confident. Here are some practical and thoughtful tips: 🔑 Core Principles Be Confident, Not Cocky Confidence is attractive; arrogance is not. Believe in yourself and speak clearly, maintain good posture, and don’t overthink. Listen Actively Ask her questions and actually listen. Remember small details—people feel valued when they're heard. Respect Her Boundaries Don’t push for anything—emotionally or physically—that she’s not comfortable with. Respect is more impressive than persistence. Show Ambition and Purpose You don’t need to be rich or famous, but having goals and a sense of direction matters. Passion is attractive—whether it’s for your career, a hobby, or a cause. 💬 Communication Tips Be funny, but don’t force it. Give sincere compliments (“I really admire how you handled that” > “You’re hot”). Avoid over-texting or being too available—space creates value. 🧠 Smart Moves That Work Dress Neatly and Smell Good First impressions matter. You don’t need designer clothes, just cleanliness and a sense of style. Be Kind to Others How you treat waiters, animals, and strangers says more about you than how you treat her. Show Emotional Intelligence Be open about your thoughts and emotions when appropriate. Vulnerability isn’t weakness—it’s strength. Surprise Her (in a Good Way) Thoughtful gestures like a favorite snack, remembering an important date, or suggesting a unique activity go a long way. 🚩 What Not to Do Don’t try to impress her by putting others down. Don’t be fake or try to be someone you’re not. Don’t rely on money, status, or showing off. If you give me more context—like your age, where you know her from, or what stage you're at (just met, dating, etc.)—I can give more tailored advice.

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1.गृहमंत्री ने फॉरेंसिक लैब का किया उद्घाटन 2.डिजीटल अरेस्ट में ठगे ₹55 लाख रुपए 3.CCTV से हो रही है सबसे महंगे आम की पहरेदारी 4.हेमकुंड साहिब में बर्फबारी की शानदार तस्वीरें आज 5.नदियों में जलस्तर बढ़ने से टूटे बांध 6.बकरीद पर नहीं कटेगा एक भी गोवंश- बावनकुले