diff --git a/mainwindow.cpp b/mainwindow.cpp
index 24b6f9c..bbf49e6 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -114,11 +114,11 @@ void MainWindow::processTempData(uint data) {
     }
     if (computed < m_minTemp - 0.1) {
         m_minTemp = computed;
-        ui->label_max_temp->setText(tr("最低温度: %1 ℃").arg(m_minTemp));
+        ui->label_min_temp->setText(tr("最低温度: %1 ℃").arg(m_minTemp));
     }
 
     QVector<QPointF> newPoints;
-    QVector<QPointF> oldPoints = m_series->pointsVector();
+    QVector<QPointF> oldPoints = m_series->points();
 
     if (oldPoints.count() <= (_DISPLAY_DATA_LENGTH_ - 1)) {
         oldPoints.append(QPointF(oldPoints.count(), computed));
diff --git a/mainwindow.ui b/mainwindow.ui
index 50191ae..232f9e5 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -1389,7 +1389,7 @@
       <item>
        <widget class="QComboBox" name="comboBox_baud">
         <property name="currentIndex">
-         <number>1</number>
+         <number>0</number>
         </property>
         <item>
          <property name="text">
@@ -1400,9 +1400,6 @@
          <property name="text">
           <string>4800</string>
          </property>
-         <property name="icon">
-          <iconset theme="applications-development"/>
-         </property>
         </item>
         <item>
          <property name="text">
@@ -1446,7 +1443,7 @@
      <x>0</x>
      <y>0</y>
      <width>662</width>
-     <height>22</height>
+     <height>24</height>
     </rect>
    </property>
   </widget>
diff --git a/mydialog.cpp b/mydialog.cpp
index f960bd3..ed4f5cf 100644
--- a/mydialog.cpp
+++ b/mydialog.cpp
@@ -5,6 +5,8 @@ myDialog::myDialog(QWidget *parent) : QDialog(parent)
 {
     QHBoxLayout *hLayout = new QHBoxLayout();
     myWidget = new QStackedWidget(this);
+    myWidget->setMinimumWidth(800);
+    myWidget->setMinimumHeight(400);
     OKbtn = new QPushButton(tr("OK"),this);
     Cancelbtn = new QPushButton(tr("Cancel"),this);
     hLayout->addWidget(OKbtn);