摘要：为了改进我国中轨道卫星搜救信号的接收设备不足的现状,以及进一步满足地面系统工程建设的测试验证需求,设计出北斗卫星导航系统(BDS)中轨道卫星搜救信号接收机,通过数据采集模块、信号检测模块、载波同步模块以及霍拉里斯(BCH)译码模块等共同实现搜救信号的接收处理。实验结果表明,该接收机可成功检测到中轨道卫星搜救信号,完成捕获跟踪并解调出有效信息实现定位。

摘要：在GNSS-R海洋遥感探测中,机载试验是一种重要手段;针对GNSS-R机载试验需要耗费巨大人力、物力以及可重复性差的问题,研究并设计了一种反射信号软件模拟器,介绍了模拟器的总体结构、流程图、关键参数、主要模块及用户界面;该模拟器在GNSS直射信号模拟器的基础上,在直射通道之外并行增加了反射信号通道;通过分析导航卫星反射信号的特点,并利用基于Z-V模型的GNSS海洋反射信号模型,配置机载GNSS海洋反射信号的时延、功率和多普勒频率等参数,从而模拟产生多颗星的多条反射信号;该模拟器可分别生成直射、反射信号两个数字中频文件,直接送入GNSS-R软件接收机进行接收处理;实验结果表明GNSS-R软件接收机的接收处理结果与设定的基于Z-V模型的相关功率曲线的相关系数为0.997 7,模拟器产生的反射信号与真实信号相关特性几乎一致,能根据用户输入的不同参数模拟输出导航卫星反射信号。

摘要：基于GNSS反射信号的双基雷达遥感是近年来国际上发展很快的一种全新概念的微波遥感方法。介绍GNSS反射信号时域处理的一种新方法,并针对现有的处理方法进行比较分析,取代了传统处理GNSS反射信号载波解调和数据相关时的乘法运算,缩短了系统的延迟时间,减少了芯片逻辑资源的损耗,使接收机功能扩展时更加灵活。文中还对其中的关建设计模块进行了详细的阐述。将该方法应用在新型的GNSS-R接收机设计中,并对实际的综合仿真结果进行分析,充分证明了方法的优越性。

摘要：在热力站供热监控系统中,需要实现MCGS触摸屏与Rockwell控制器的实时通讯与控制。对于供热系统热力子站,采用Rockwell公司Micro 2080实现供热自动控制,并通过MODBUS协议实现与昆仑通态TPC1061Ti触摸屏的通信,实时显示温度、压力和流量等热力参数,并在触摸屏上进行循环泵、补水泵的频率设定和智能阀门阀位设定,通过设定补水泵的启停压力实现系统自动补水功能。

摘要：该课题利用北斗导航卫星系统信号,研究用于农田作业的实时定位系统、电路系统以及数据传输和远程监控,最终设计出用于农作物收割的机车作业管理系统。本系统集成了高精度的北斗卫星定位系统、精确的面积计算方法和智能化的手机APP软件测量,能实时测量土地面积、土壤温湿度测量和机车速度等,并具有机车远程管理功能。

摘要：为准确识别桥梁结构的损伤程度,制作了桥梁的关键构件——预应力钢筋混凝土梁,进行三点弯曲加载试验.收集了损伤破坏全过程的声发射(AE)信号,通过AE信号参数分析,将梁的损伤破坏过程划分为4个典型阶段.构建了长短时记忆神经网络(LSTM)模型,根据经验设置LSTM模型的超参数容易导致网络陷入局部最优而影响了分类结果,提出采用Sine混沌映射和自适应权重来改进鲸鱼优化算法(WOA),对LSTM进行超参数寻优.设计了IWOA-LSTM算法模型,训练识别试验梁各损伤阶段的AE信号特征参数.定型网络结构,并识别同种工况下其他梁的AE信号.结果表明:IWOA-LSTM算法模型识别准确率均超过或接近92%,相较于普通LSTM模型,IWOA-LSTM模型识别准确率提高了约7%.

摘要：A series of strobilurin-l,2,4-triazole derivatives containing a furan or thiophen ring was designed andsynthesized. The structures of the compounds were characterized by 1H NMR, 13C NMR and HRMS spectra. Thebioassays indicated that the fungicidal activities of compounds 10b（EC50=14.82 mg/L） and 10c（EC50=18.72 mg/L）against Cercospora arachidicola Hori in vitro were much higher than that of Azoxystrobin as control（EC50=40.54mg/L） and the fungicidal activities of compounds 10u（EC50=8.66 rag/L） and 10n（EC50=9.89 rag/L） against Rhizotoniacerealis in vitro were higher than that of the same control（EC50=10.86 rag/L）. Compounds 10b, 10c, 1011 and 10kcould be considered as the leading compounds for further investigation.

摘要：Three novel series of 5-substituted sulfonylurea derivatives were designed and synthesized via introducing a triazole or oxadiazole ring at the 5th position of the benzene ring in classical sulfonylurea herbicides. All the target compounds were confirmed by means of IH nuclear magnetic resonance（NMR）, 13C NMR and elemental analysis. The bioassay results show that the target compounds containing an oxadiazole ring at the 5th position display moderate to excellent herbicidal activities against Brassica campestris and Amaranthus retroflexus under soil treatment. Especially, compounds zdk20, zdk21 and zdk22 possess 98.6%, 96.5% and 94.5% inhibition rates, respectively, against Amaranthus retroflexus at a concentration of 75 g/ha（1 ha=1× 104 m2） under soil treatment, which approach to those of the commercial herbicide chlorsulfuron.

摘要：To develop novel sulfonylurea herbicides, a series of chlorsulfuron derivatives was designed and synthesized through introducing tetrahydrophthalimide substructure taken from protoporphyrinogen IX oxidase（PPO） inhibitors onto the critical 5-position of the classical benzene ring. The structures of title compounds were confirmed by infrared spectroscopy, ultraviolet spectroscopy, 1H and 13C NMR spectrometry, mass spectrometry and elemental analysis. In addition, the crystal structure of compound I1-5 was further determined by X-ray diffraction analysis. Bioassay results showed that individual compounds exhibited good herbicidal activities, especially compound I1-8, which displayed 100% inhibition rate against Echinochloa crusgalli at 150 g/ha（1 ha=104 m2） with the method of foliage spray in the pot experiment.

摘要：In order to search for potent and environmental friendly insecticides with new modes of action, a series of pyranoside derivatives mimicking D-myo-inositol 1,4,5-trisphosphate （IP3） were designed and synthesized according to the bioisosterie approach. The biological assay indicated that most of the new compounds showed moderate to good insecticidal activities against oriental armyworm （Mythimna separata） and diamondback moth （PluteIla xylostella）. Especially, compound 5g displayed 80% larvicidal activity against oriental armyworm at 50 mg/L. Meanwhile, 5a showed 100% and 70% larvicidal activities against diamondback moth at 50 and 25 nag/L, respectively. To further explore the mode of action, calcium imaging technique was applied to study the effects of 5a, 5g, and 5i on the intracellular calcium ion concentration （[Ca^2＋]i） in central neurons isolated from Spodoptera exigua. The results indicated that the tested compounds released stored calcium ions from endoplasmic reticulum.