The Binchuan area of Yunnan is located in the western part of the Emeishan large igneous province in the western margin of the Yangtze Block. In the present study, the Wuguiqing profile in thickness of about 1440 m is...The Binchuan area of Yunnan is located in the western part of the Emeishan large igneous province in the western margin of the Yangtze Block. In the present study, the Wuguiqing profile in thickness of about 1440 m is mainly composed of high-Ti basalts, with minor picrites in the lower part and andesites, trachytes, and rhyolites in the upper part. The picrites have relatively higher platinum- group element （PGE） contents （PGE=16.3-28.2 ppb）, with high Cu/Zr and Pd/Zr ratios, and low S contents （5.03-16.9 ppm）, indicating the parental magma is S-unsaturated and generated by high degree of partial melting of the Emeishan large igneous province （ELIP） mantle source. The slightly high Cu/Pd ratios （11 000-24 000） relative to that of the primitive mantle suggest that 0.007% sulfides have been retained in the mantle source. The PGE contents of the high-Ti basalts exhibit a wider range （~PGE=0.517-30.8 ppb）. The samples in the middle and upper parts are depleted in PGE and have ~Nd （260 Ma） ratios ranging from -2.8 to -2.2, suggesting that crustal contamination of the parental magma during ascent triggered sulfur saturation and segregation of about 0.446%-0.554% sulfides, and the sulfide segregation process may also provide the ore-forming material for the magmatic Cu-Ni-PGE sulfide deposits close to the studied basalts. The samples in this area show Pt- Pd type primitive mantle-normalized PGE patterns, and the Pd/Ir ratios are higher than that of the primitive mantle （Pd/Ir=l）, indicating that the obvious differentiation between Ir-group platinum- group elements （IPGE） and Pd-group platinum-group elements （PPGE） are mainly controlled by olivine or chromites fractionation during magma evolution. The Pd/Pt ratios of most samples are higher than the average ratio of mantle （Pd/Pt=0.55）, showing that the differentiation happened between Pt and Pd. The differentiation in picrites may be relevant to Pt hosted in discrete refractory Pt-alloy phase in the mantle; whereas the differentiation in the high-Ti basalts is probably associated with the fractionation of Fe-Pt alloys, coprecipitating with Ir-Ru-Os alloys. Some high-Ti basalt samples exhibit negative Ru anomalies, possibly due to removal of laurite collected by the early crystallized chromites.展开更多
针对秸秆燃料送往循环流化床锅炉燃烧发电时,其热值无法在线估量,计量实效性低的问题,设计了一套用于秸秆燃料热值估计的图像分析系统;该系统由工业摄像机、图像分析主机、服务器和工业互联通信网络总线组成;系统通过工业摄像机在秸秆...针对秸秆燃料送往循环流化床锅炉燃烧发电时,其热值无法在线估量,计量实效性低的问题,设计了一套用于秸秆燃料热值估计的图像分析系统;该系统由工业摄像机、图像分析主机、服务器和工业互联通信网络总线组成;系统通过工业摄像机在秸秆燃料进入锅炉前进行图像采集,并将采集到的图像通过高速差分信号传送给图像分析主机,主机采用改进的U-Net深度学习网络对图像进行分割;得到的分类结果结合从服务器读取的秸秆燃料的成分组成和组分的热值,加之实时返回的秸秆燃料含水率等参数,通过热值计算公式实时计算出燃料热值;测试结果表明,基于改进U-Net深度学习网络的图像分割算法分割效果较好,平均精度(mean Average Precision)达到0.86,平均重合度(mean Intersection over Union)达到0.68,可以满足燃料热值的在线估量要求。展开更多
针对车联网环境下车辆自适应巡航系统的数据攻击检测问题,提出一种基于自适应卡尔曼滤波的网联车巡航系统数据攻击检测方法。首先,结合网联车自适应巡航控制系统模型,建立随机数据攻击、隐蔽虚假数据攻击和拒绝服务(Denial of service,D...针对车联网环境下车辆自适应巡航系统的数据攻击检测问题,提出一种基于自适应卡尔曼滤波的网联车巡航系统数据攻击检测方法。首先,结合网联车自适应巡航控制系统模型,建立随机数据攻击、隐蔽虚假数据攻击和拒绝服务(Denial of service,DoS)数据攻击的数学模型,考虑网联车巡航系统存在不可测的未知测量噪声场景,设计测量噪声自适应动态估计的巡航系统卡尔曼滤波算法;其次,针对常规卡方检测器对隐蔽虚假数据攻击检测的不足,提出基于自适应卡尔曼滤波的网联车巡航系统数据攻击检测方法;最后,以网联车变速巡航工况为测试场景,通过对比仿真实验,分别针对随机数据攻击、隐蔽虚假数据攻击和DoS数据攻击,验证了该方法的有效性。展开更多
基金supported by the National Basic Research Program of China(No.2007CB411401)the Knowledge Innovation Program of the Chinese Academy of Sciences(No.KZCX2-YW-136)the National Natural Science Formation of China(No.40873028)
文摘The Binchuan area of Yunnan is located in the western part of the Emeishan large igneous province in the western margin of the Yangtze Block. In the present study, the Wuguiqing profile in thickness of about 1440 m is mainly composed of high-Ti basalts, with minor picrites in the lower part and andesites, trachytes, and rhyolites in the upper part. The picrites have relatively higher platinum- group element （PGE） contents （PGE=16.3-28.2 ppb）, with high Cu/Zr and Pd/Zr ratios, and low S contents （5.03-16.9 ppm）, indicating the parental magma is S-unsaturated and generated by high degree of partial melting of the Emeishan large igneous province （ELIP） mantle source. The slightly high Cu/Pd ratios （11 000-24 000） relative to that of the primitive mantle suggest that 0.007% sulfides have been retained in the mantle source. The PGE contents of the high-Ti basalts exhibit a wider range （~PGE=0.517-30.8 ppb）. The samples in the middle and upper parts are depleted in PGE and have ~Nd （260 Ma） ratios ranging from -2.8 to -2.2, suggesting that crustal contamination of the parental magma during ascent triggered sulfur saturation and segregation of about 0.446%-0.554% sulfides, and the sulfide segregation process may also provide the ore-forming material for the magmatic Cu-Ni-PGE sulfide deposits close to the studied basalts. The samples in this area show Pt- Pd type primitive mantle-normalized PGE patterns, and the Pd/Ir ratios are higher than that of the primitive mantle （Pd/Ir=l）, indicating that the obvious differentiation between Ir-group platinum- group elements （IPGE） and Pd-group platinum-group elements （PPGE） are mainly controlled by olivine or chromites fractionation during magma evolution. The Pd/Pt ratios of most samples are higher than the average ratio of mantle （Pd/Pt=0.55）, showing that the differentiation happened between Pt and Pd. The differentiation in picrites may be relevant to Pt hosted in discrete refractory Pt-alloy phase in the mantle; whereas the differentiation in the high-Ti basalts is probably associated with the fractionation of Fe-Pt alloys, coprecipitating with Ir-Ru-Os alloys. Some high-Ti basalt samples exhibit negative Ru anomalies, possibly due to removal of laurite collected by the early crystallized chromites.
文摘针对秸秆燃料送往循环流化床锅炉燃烧发电时,其热值无法在线估量,计量实效性低的问题,设计了一套用于秸秆燃料热值估计的图像分析系统;该系统由工业摄像机、图像分析主机、服务器和工业互联通信网络总线组成;系统通过工业摄像机在秸秆燃料进入锅炉前进行图像采集,并将采集到的图像通过高速差分信号传送给图像分析主机,主机采用改进的U-Net深度学习网络对图像进行分割;得到的分类结果结合从服务器读取的秸秆燃料的成分组成和组分的热值,加之实时返回的秸秆燃料含水率等参数,通过热值计算公式实时计算出燃料热值;测试结果表明,基于改进U-Net深度学习网络的图像分割算法分割效果较好,平均精度(mean Average Precision)达到0.86,平均重合度(mean Intersection over Union)达到0.68,可以满足燃料热值的在线估量要求。
文摘针对车联网环境下车辆自适应巡航系统的数据攻击检测问题,提出一种基于自适应卡尔曼滤波的网联车巡航系统数据攻击检测方法。首先,结合网联车自适应巡航控制系统模型,建立随机数据攻击、隐蔽虚假数据攻击和拒绝服务(Denial of service,DoS)数据攻击的数学模型,考虑网联车巡航系统存在不可测的未知测量噪声场景,设计测量噪声自适应动态估计的巡航系统卡尔曼滤波算法;其次,针对常规卡方检测器对隐蔽虚假数据攻击检测的不足,提出基于自适应卡尔曼滤波的网联车巡航系统数据攻击检测方法;最后,以网联车变速巡航工况为测试场景,通过对比仿真实验,分别针对随机数据攻击、隐蔽虚假数据攻击和DoS数据攻击,验证了该方法的有效性。
