海量目标量测数据下的目标跟踪

针对大量传感器同时跟踪同一目标产生海量目标量测数据而一般融合滤波算法难以处理的问题,提出了通过数学统计原理提取跟踪状态信息并应用交互式多模型统计滤波算法进行解决的方法.该方法首先利用数学统计原理从海量目标量测数据中统计出目标跟踪滤波过程中所需要信息,并利用改进的交互式当前统计模型算法对所提取信息进行滤波,在不影响跟踪精度的情况下很好地解决了的海量目标量测信息的融合跟踪问题.理论分析和仿真结果证明了该方法的有效性.     

清炖猪肉汤香气物质的分析鉴定

对实验所用猪肉的氨基酸组成及脂肪酸组成进行分析。将猪肉清炖3 h的肉汤,采用溶剂辅助蒸发提取,气相色谱-质谱联机分析,通过谱库检索和保留指数核对,鉴定出70种化合物;进一步采用稀释法-气相色谱-嗅闻分析,结合保留指数、气味特征及与标准品比对,鉴定出24种香气活性物质。所鉴定的气味活性化合物主要为脂肪族的醛类、酮类、醇类及含硫化合物,稀释因子较高的(log2FD≥9)有庚醛、壬醛、(E)-2-壬烯醛、(E,E)-2,4-癸二烯醛、2-十一酮、3-羟基-2-丁酮、3-(甲硫基)丙醛、糠硫醇、二甲基三硫醚、2-噻吩硫醇、双(2-甲基-3-呋喃基)二硫醚、1-辛烯-3-醇、γ-癸内酯。     

06CuNiCrMoNb时效硬化型钢模拟焊接热影响区的组织和性能

研究了热输入对 0 6CuNiCrMoNb钢模拟焊接热影响区不同部位组织和性能的影响 ,并重点分析了过热区的韧性与组织之间的关系     

智能电能表数据安全隐患多层次分析与系统设计

电能计量装置是智能电网的核心部分,对用户和电力企业提供多种先进功能,但多数电能计量装置缺乏安全性保护。针对此问题,提出了一种安全漏洞多层次分析与系统设计方案。该系统考虑了大量用电日志,以便向用户提供详细信息,允许其有效识别出用电高峰时段。使用安全文件传输协议(FTP)将用电数据从智能电能表传递至电力企业服务器,以确保数据传输的隐私性和安全性。系统中还使用了加密技术,通过传输层安全(TLS)/安全套接字层(SSL)来保护用户与Web门户之间的通信。通过对系统强化等分析表明,与同类系统相比,所提系统设计具有较大的安全性优势。     

Large scale and environmentally friendly preparation of micro-submicron spherical silica and their surface effect in resin materials

Amorphous micro-submicron spherical silica powders with different particle sizes and surface properties were prepared by turbulent flow cycle method and characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MASS), X-ray diffraction (XRD), particle size distribution (PSD), specific surface area (SSA) analysis and scanning electron microscopy (SEM). The effects of particle size and surface property of different spherical silica on the fluidity of resin materials were conducted. The result showed that the spherical silica with the characterization of D₅₀ = 2.5 μm and the ratio of experimental specific surface area and calculated specific surface area is 2.38, played a better role in the flow ability of epoxy materials. So it may be a better choice for the preparation of epoxy materials used in IC packaging area and other high-tech fields.     

校企合作的高职院校化工类专业课程教学质量评价研究

对于高职院校化工类专业课程的教学质量评价,提出了一种评价主体多元化、评价内容全面化以及评价范围宽广化的评价方法。该法具有评价方法科学性、评价过程实用性和评价结果开放性等特点,对进一步提升高职院校的教学质量具有一定的实践指导意义。     

层次分析法(AHP)在军团菌杀灭方法评判中的应用

该文利用层次分析法(AHP)对军团菌杀灭方法进行综合评判。以中央空调循环冷却水系统为例,建立评价指标系统,对军团菌控制效果以及化学杀生剂进行综合评价,由此得到化学法是最适于中央空调循环冷却水系统的杀菌方法。其中军团菌特效杀菌剂的杀菌性能最佳,可作为应急处理药剂,二氧化氯、2,5-二溴海因、二氯异氰尿酸可作为日常处理药剂。在条件允许的情况下,可使用臭氧作为处理药剂。     

Carbon nanosheets with catalyst-induced wrinkles formed by plasma-enhanced chemical-vapor deposition

Substrates with and without catalyst layers have been tested for the capacitively coupled radio-frequency plasma-enhanced chemical-vapor deposition of carbon nanosheets (CNSs) at a temperature as low as 500 °C. Glass coated with Ni, Ni/Co, Co/Ni, and Ni/Zn and glass without a catalyst layer were used as the substrates. CNSs were only obtained on substrate samples with a catalyst layer. The morphology of the CNSs was catalyst dependent. Both flat and standing CNSs were obtained. Transmission electron microscopy analysis revealed that the CNSs deposited on a Ni/Zn catalyst layer have densely distributed catalyst-induced wrinkles, while still sustaining a planar structure. The numerous wrinkles mean that these CNSs may serve as catalyst supports, ultracapacitor electrodes and gas-sensor materials. Electron diffraction and Raman studies showed that the CNSs obtained in this experiment are reasonably graphitized.     

铅酸蓄电池正极活性物质的研究

采用有效添加剂,提高了铅酸蓄电池正极活性物质利用率,延长了使用寿命.软化脱粉现象明显改善.通过X射线衍射分析、电子扫描显微镜分析和比表面的测定,解释了不同添加剂对PbO_2电极的组成、结构和性能的影响原因,确定了添加剂的最佳合量,从而得到较好的配方.     

国内外聚氨酯工业最新发展状况

简要介绍了国内外聚氨酯行业的发展史,着重介绍了近几年全球和中国聚氨酯主要原料与制品发展情况、聚氨酯行业企业最新并购情况、聚氨酯行业最新技术进展,并对聚氨酯行业热点问题进行了分析.