diff --git a/Models/AppConfig.cs b/Models/AppConfig.cs
index cb66994..103c8d6 100644
--- a/Models/AppConfig.cs
+++ b/Models/AppConfig.cs
@@ -68,8 +68,8 @@ public class TestParameters
 
 
 
-    public double FitStartTime { get; set; } = 0.01;   // 默认0.35秒，避开早期扰动
-    public double FitEndTime { get; set; } = 0.3;
+    public double FitStartTime { get; set; } = 0.01; // 默认0.35秒，避开早期扰动
+    public double FitEndTime { get; set; } = 0.1;
 
 
 
diff --git a/ViewModels/D7896ViewModel.cs b/ViewModels/D7896ViewModel.cs
index 32761c0..136ef19 100644
--- a/ViewModels/D7896ViewModel.cs
+++ b/ViewModels/D7896ViewModel.cs
@@ -90,10 +90,9 @@ public partial class D7896ViewModel : ObservableObject
 
     private const double EulerGamma = 0.5772156649;   // 欧拉常数
     //private const double WireRadius = 0.00003;        // 铂丝半径 (0.03 mm)
-    private const double WireRadius = 0.00010;        // 铂丝半径 (0.03 mm)
     [ObservableProperty] private double _sampleDensity = 1000.0;   // 新增，密度默认值1000 kg/m³（水）
     int samples = 1000; // 1秒 * 1000点/秒
-    double heatingDuration = 1;        // 加热时间 0.8 秒（需与您的加热脉冲宽度一致）
+    double heatingDuration =1;        // 加热时间 0.8 秒（需与您的加热脉冲宽度一致）
     double totalDuration = 2;            // 总采样时间（加热 + 冷却）
     public D7896ViewModel()
     {
@@ -409,7 +408,7 @@ public partial class D7896ViewModel : ObservableObject
 
                 if (i < _config.TestParameters.MeasurementCount && !_stopRequested)
                 {
-                    try { await Task.Delay(_config.TestParameters.IntervalSeconds * 1000, _testCts.Token); } catch (OperationCanceledException) { break; }
+                    try { await Task.Delay(_config.TestParameters.IntervalSeconds * 500, _testCts.Token); } catch (OperationCanceledException) { break; }
                 }
             }
 
@@ -550,7 +549,7 @@ public partial class D7896ViewModel : ObservableObject
         // 计算热扩散率
         double exponent = intercept / slope + EulerGamma;
         if (exponent > 30) exponent = 30;
-        double alpha = (WireRadius * WireRadius / 4.0) * Math.Exp(exponent);
+        double alpha = (_config.TestParameters.PlatinumWireDiameter / 2 * _config.TestParameters.PlatinumWireDiameter / 2 / 4.0) * Math.Exp(exponent);
         if (_config.TestParameters.UseFixedAlpha)
         {
             alpha = _config.TestParameters.FixedAlpha;
@@ -635,7 +634,7 @@ public partial class D7896ViewModel : ObservableObject
         for (int i = 0; i < n; i++)
         {
             bool inFit = (i >= fitStart && i <= fitEnd);
-            sw.WriteLine($"{i},{time[i]:F6},{ustd[i]:F6},{upt[i]:F6},{(double.IsNaN(deltaT[i])?0:deltaT[i]):F6},{(inFit?1:0)}");
+            sw.WriteLine($"{i},{time[i]:F6},{ustd[i]:F6},{upt[i]:F6},{(double.IsNaN(deltaT[i]) ? 0 : deltaT[i]):F6},{(inFit ? 1 : 0)}");
         }
     }
 
diff --git a/appsettings.json b/appsettings.json
index f48a6a0..421342b 100644
--- a/appsettings.json
+++ b/appsettings.json
@@ -26,8 +26,9 @@
     "MeasurementCount": 10,
     "IntervalSeconds": 30,
     //"PlatinumWireLength": 0.056, //铂丝长度（单位：米）
+    //"PlatinumWireDiameter": 0.00006,
     "PlatinumWireLength": 0.41, //铂丝长度（单位：米）
-    "PlatinumWireDiameter": 0.000025,
+    "PlatinumWireDiameter": 0.00018,
     "ReportOutputPath": "Reports\\",
     "DefaultSampleVolume": 40.0,
     "DefaultPressure": 0.0,