请用python，pyqt5写一个UI界面代码，具有如下功能：1.一个widget主窗口，包含5个子窗口；2.开启一个子进程，一个窗口显示mlx90640动态色温图，一个窗口显示最大温度随时间的变化曲线图；3.开启一个子进程，一个窗口显示usb摄像头的动态画面，一个窗口显示图像中物体大小与时间的变化曲线图；4.一个窗口显示程序运行过程中的的print信息，包括主进程和子进程

以下是一个简单的示例代码，实现了上述功能：

import sys
import os
import time
import subprocess

from PyQt5.QtCore import Qt, QTimer
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QTextEdit


class MainWidget(QWidget):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Main Widget")
        self.resize(800, 600)

        self.sub_widgets = []

        layout = QVBoxLayout()

        for i in range(5):
            sub_widget = SubWidget(i)
            self.sub_widgets.append(sub_widget)
            layout.addWidget(sub_widget)

        self.setLayout(layout)


class SubWidget(QWidget):
    def __init__(self, index):
        super().__init__()

        self.setWindowTitle(f"Sub Widget {index + 1}")
        self.resize(400, 300)

        self.process = None

        layout = QVBoxLayout()

        if index == 0:
            # MLX90640 dynamic temperature map
            self.label = QLabel()
            layout.addWidget(self.label)

            self.start_mlx90640()

        elif index == 1:
            # Maximum temperature vs time curve
            self.curve_label = QLabel()
            layout.addWidget(self.curve_label)

            self.start_temperature_curve()

        elif index == 2:
            # USB camera dynamic image
            self.label = QLabel()
            layout.addWidget(self.label)

            self.start_usb_camera()

        elif index == 3:
            # Object size vs time curve
            self.curve_label = QLabel()
            layout.addWidget(self.curve_label)

            self.start_object_size_curve()

        elif index == 4:
            # Print information
            self.text_edit = QTextEdit()
            self.text_edit.setReadOnly(True)
            layout.addWidget(self.text_edit)

        self.setLayout(layout)

    def start_mlx90640(self):
        # Start a subprocess to run the mlx90640 program
        self.process = subprocess.Popen(["python", "mlx90640.py"], stdout=subprocess.PIPE)

        # Read the temperature map from stdout and update the label
        timer = QTimer(self)
        timer.timeout.connect(lambda: self.update_label(self.label, self.process.stdout))
        timer.start(50)

    def start_temperature_curve(self):
        # Start a subprocess to run the temperature curve program
        self.process = subprocess.Popen(["python", "temperature_curve.py"], stdout=subprocess.PIPE)

        # Read the curve image from stdout and update the label
        timer = QTimer(self)
        timer.timeout.connect(lambda: self.update_label(self.curve_label, self.process.stdout))
        timer.start(50)

    def start_usb_camera(self):
        # Start a subprocess to run the usb camera program
        self.process = subprocess.Popen(["python", "usb_camera.py"], stdout=subprocess.PIPE)

        # Read the camera image from stdout and update the label
        timer = QTimer(self)
        timer.timeout.connect(lambda: self.update_label(self.label, self.process.stdout))
        timer.start(50)

    def start_object_size_curve(self):
        # Start a subprocess to run the object size curve program
        self.process = subprocess.Popen(["python", "object_size_curve.py"], stdout=subprocess.PIPE)

        # Read the curve image from stdout and update the label
        timer = QTimer(self)
        timer.timeout.connect(lambda: self.update_label(self.curve_label, self.process.stdout))
        timer.start(50)

    def update_label(self, label, stdout):
        # Read one line from stdout
        line = stdout.readline().decode().strip()

        if not line:
            # Process has ended
            label.setText("Process ended.")
            return

        if label.width() == 0 or label.height() == 0:
            # Label has not been shown yet, wait for it to be shown
            return

        if label.pixmap() is None:
            # Create a new pixmap
            pixmap = QPixmap(label.width(), label.height())
            pixmap.fill(Qt.white)
            label.setPixmap(pixmap)

        # Draw the image or curve on the pixmap
        if line.startswith("image:"):
            pixmap = QPixmap.fromImage(QImage.fromData(line[6:].encode()))
            label.setPixmap(pixmap)

        elif line.startswith("curve:"):
            pixmap = QPixmap.fromImage(QImage.fromData(line[6:].encode()))
            label.setPixmap(pixmap)

        else:
            # Append the line to the text edit
            self.text_edit.append(line)

    def closeEvent(self, event):
        if self.process is not None and self.process.poll() is None:
            # Terminate the subprocess if it is still running
            self.process.terminate()
            self.process.wait()

        super().closeEvent(event)


if __name__ == "__main__":
    app = QApplication(sys.argv)

    main_widget = MainWidget()
    main_widget.show()

    sys.exit(app.exec_())

说明：

- 程序开启了一个 `MainWidget`，包含了 5 个子窗口 `SubWidget`。
- 对于每个子窗口 `SubWidget`，程序开启了一个子进程来运行对应的程序，并通过定时器和标签控件来显示程序输出的图片或曲线。
- 当 `SubWidget` 被关闭时，程序会终止对应的子进程。