加速物联网行业的发展与创新：探索云物联网平台的影响

pythonCopy codeimport requests
from bs4 import BeautifulSoup
# 发起HTTP请求获取网页内容
response = requests.get('https://example.com')
html_content = response.text
# 使用BeautifulSoup解析网页内容
soup = BeautifulSoup(html_content, 'html.parser')
# 提取所需信息
title = soup.title.string
links = [a['href'] for a in soup.find_all('a')]
# 打印结果
print('网页标题:', title)
print('链接列表:', links)

pythonCopy codefrom sklearn.datasets import fetch_20newsgroups
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn import svm
# 加载数据集
categories = ['alt.atheism', 'soc.religion.christian', 'comp.graphics', 'sci.med']
train_data = fetch_20newsgroups(subset='train', categories=categories, shuffle=True, random_state=42)
# 特征提取
vectorizer = TfidfVectorizer()
train_features = vectorizer.fit_transform(train_data.data)
# 模型训练和预测
clf = svm.SVC()
clf.fit(train_features, train_data.target)
# 测试数据
test_docs = ['This is about atheism', 'Graphical representation of data', 'Christianity beliefs']
test_features = vectorizer.transform(test_docs)
predictions = clf.predict(test_features)
# 打印预测结果
for doc, category in zip(test_docs, predictions):
    print(doc, 'belongs to', train_data.target_names[category])

pythonCopy codeimport cv2
# 读取图像
image = cv2.imread('image.jpg')
# 转换为灰度图像
gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
# 图像模糊
blurred_image = cv2.GaussianBlur(gray_image, (5, 5), 0)
# 边缘检测
edges = cv2.Canny(blurred_image, 30, 150)
# 显示图像
cv2.imshow('Original Image', image)
cv2.imshow('Edges', edges)
cv2.waitKey(0)
cv2.destroyAllWindows()

pythonCopy codeimport Adafruit_DHT
# 设置传感器类型和引脚编号
sensor = Adafruit_DHT.DHT11
pin = 4
# 读取温湿度数据
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
# 打印温湿度
if humidity is not None and temperature is not None:
    print('温度: {0:0.1f}°C'.format(temperature))
    print('湿度: {0:0.1f}%'.format(humidity))
else:
    print('无法读取传感器数据')

C++Copy code#define SENSOR_PIN A0
void setup() {
  Serial.begin(9600);
}
void loop() {
  // 读取光照传感器值
  int sensorValue = analogRead(SENSOR_PIN);
  
  // 打印传感器值
  Serial.print("光照传感器值：");
  Serial.println(sensorValue);
  
  // 延迟1秒
  delay(1000);
}

C++Copy code#define MOTOR_PIN_1 2
#define MOTOR_PIN_2 3
#define ENABLE_PIN 9
void setup() {
  pinMode(MOTOR_PIN_1, OUTPUT);
  pinMode(MOTOR_PIN_2, OUTPUT);
  pinMode(ENABLE_PIN, OUTPUT);
}
void loop() {
  // 设置电机方向
  digitalWrite(MOTOR_PIN_1, HIGH);
  digitalWrite(MOTOR_PIN_2, LOW);
  
  // 控制电机速度
  analogWrite(ENABLE_PIN, 200);
  
  // 延迟2秒
  delay(2000);
  
  // 停止电机
  digitalWrite(MOTOR_PIN_1, LOW);
  digitalWrite(MOTOR_PIN_2, LOW);
  
  // 延迟2秒
  delay(2000);
}