Synthesis,Crystal Structure and Anti-TMV Activity of(Z)-4-[3-(4-Methyl-1,2,3-thiadiazol-5-yl)-3-(4-trifluoromethylphenyl)acryloyl]morpholine

The target compound(Z)-4-[3-(4-methyl-1,2,3-thiadiazol-5-yl)-3-(4-trifluoromethylphenyl)acryloyl]morpholine was synthesized by the nucleophilic substitution,Horner-Emmons reaction,ester hydrolysis,and condensation.Its structure was characterized by NMR,H RMS and single-crystal X-ray diffraction.The crystal of the target compound belongs to monoclinic system,space group P2₁ with a=11.5058(15),b=6.6626(10),c=23.184(3)?,V=1777.3(4)?³,Z=8,D_c=1.496 Mg/m³,F(000)=792 andμ=0.229 mm^–1.X-ray analysis indicated C–H....O intermolecular H-bonds in this crystal structure.The target compound exhibited 53%curative activity against TMV.     

烟幕对光电观瞄设备干扰效果的评估准则

为定量、客观评估烟幕对光电观瞄设备的干扰效果，应用Johnson准则和数字图像处理方法，提出了四种评估准则：目标鉴别等级准则、目标鉴别概率准则、作用距离准则和相似度准则．目标鉴别等级准则、目标鉴别概率准则和作用距离准则分别依据实施干扰前后光电观瞄设备的目标鉴别等级、目标鉴别概率和作用距离的变化评估烟幕对光电观瞄设备的干扰效果．相似度准则利用光电观瞄设备在实施干扰前后图像之间的相似度评估烟幕干扰效果．