137Cs和Sr-Y混合源β谱解谱程序设计

利用C语言针对137Cs和Sr-Y混合源所形成的混合β谱进行解谱程序设计,该程序的核心方法为居里描绘方法;并针对解谱之后分别得到的137Cs和Sr-Y的能谱数据及活度进行了实验室验证,得到了较好的实验结果;该解谱程序设计可用于研究核电站安全壳大气中混合β放射性核素的特定核素的活度测量.     

基于人均建设用地指标法的农村居民点整理潜力测算及效益分析?——以石柱土家族自治县为例

基于乡村聚落地理理论,以石柱土家族自治县为例,采用人均建设用地指标法测算农村居民点整理潜力,根据测算结果进行潜力分级,最后对其效益定性分析。结果表明:以石柱县经济发展及丘陵山区的现状为基础,计算农村居民点土地整理潜力可以有效增加164.31 hm2耕地;其中西南片区最具整理潜力,下路镇整理潜力最大为45.65 hm2。     

基于敏感元组的隐私数据保护方法

针对现有k-匿名隐私保护方法的缺点,提出了3种基于敏感元组的隐私数据发布方法.首先,通过定义敏感元组,设计了只保护隐私信息的朴素敏感元组匿名方法(NSTAM).然后,在引入敏感元组密度的基础上,提出了一种扩展的敏感元组保护方法(e-STAM);该方法通过对敏感元组进行mk-匿名运算,引入(1-m)k个非敏感元组,并同等概化引入的非敏感元组,使得匿名后每个分组中的敏感元组密度满足用户设定的阈值m.最后,针对实际应用中发布数据的敏感度差异,引入了加权敏感元组密度概念,并设计了加权的敏感元组数据保护方法(WSTAM);该方法通过对敏感值和敏感元组赋予不同的权重,实现对敏感元组的区别保护.理论分析和实验结果表明,这3种算法能够提高发布数据的精度,保证敏感数据的安全度,因此是有效可行的.     

功能化多壁碳纳米管对NHFB细胞的毒性研究

以人的正常上皮成纤维细胞(normal human fibroblasts,NHFB)为模型,应用WST-1方法对本课题组前期合成的功能化多壁碳纳米管(functionalized multi-walled carbonnanotubes,f-MWNTs)库进行细胞毒性筛选;选取细胞毒性差异较大的几种f-WNTs,研究细胞对其摄入情况及其对细胞增殖和活性氧(reactive oxygen species,ROS)产生的影响规律。结果表明:经过不同表面修饰的多壁碳纳米管具有不同的细胞毒性;f-MWNTs能够进入细胞,且其对细胞增殖及ROS的产生均呈显著的剂量依赖关系。     

论茶文化与云南民族关系及边疆和谐发展

茶文化对云南边疆各民族关系和社会发展有着重大影响,如对民族经济及社会历史发展的影响;对民族文化交流的影响及对民族关系及和谐社会的影响等都十分突出。通过深入调查研究,通过挖掘和探索民族茶文化内涵中的优秀文化传统,通过对各民族在茶文化中的民族关系和文化交流的探讨,以科学的发展观来推动民族地区的和谐发展,可以为今天的云南边疆和谐社会建设有所裨益。     

A BP neural network based information fusion method for urban traffic speed estimation

Obtaining comprehensive and accurate information is very important in intelligent traffic system (ITS). In ITS, the GPS floating car system is an very important approach for traffic data acquisition. However, in this system, the GPS blind areas caused by tall buildings and tunnels could affect the acquisition of traffic information and depress the system performance. Aiming at this problem, we developed a novel method employing a back propagation (BP) neural network to estimate the traffic speed in the GPS blind areas. When the speed of one road section is lost, we can use the speed of its related road sections to estimate its speed. The complete historical data of these road sections are used to train the neural network, using Levenberg-Marquardt learning algorithm. Then, the current speed of the related roads is used by the trained neural network to get the speed of the road section without GPS signal. We compare the speed of the road section estimated by our method with the real speed of this road section, and the experimental results show that the speed of this road section estimated by our method is better.     

从大连输油管爆炸反思油气设备驱动方式——非能动控制驱动对油气储运的特殊意义

通过分析大连输油管爆炸,对当今国内外油气储运设备驱动方式进行反思。提出非能动控制原理和方法,阐述非能动控制梭式核心元件的结构和原理;对非能动梭式控制管道爆破保护系统、巨型油罐梭式消防止回阀进行分析,得出非能动控制驱动对油气储运具有特殊意义。     

基于水杨醛的三维Cu(Ⅱ)配合物的合成和结构研究

以水杨醛(HL)与Cu(NO3)2.3H2O在少量三乙胺存在的CH3OH溶剂中,室温挥发的方法培养出无色配合物[Cu(L)2n].晶体结构分析表明,配合物属于单斜晶系P2(1)/c空间群.Cu(Ⅱ)中心采取四配位的平面四边形构型.水杨醛配体采用双齿螯合配位模式,通过氧原子与铜配位形成配位化合物.配位单元之间通过碳原子和碳原子以及氧原子间氢键作用形成最终的三维结构.     

超声强化亚临界CO_2萃取的动力学模型及机理

为了研究超声强化亚临界CO2萃取的机理,说明超声对亚临界CO2萃取的传质强化效果,借助萃取动力学模型对实验数据进行了拟合,并通过超声空化阈值的理论计算,得到亚临界CO2的空化阈值随温度和压力的变化,同时结合超声空化的验证实验,探讨了超声在亚临界CO2中的空化情况.结果表明:动力学方程能够较好地拟合萃取实验结果,模型方程中有无超声的E∞和k值的差异也证实了超声对亚临界CO2萃取有明显的传质强化效果;相对较高的温度和较低的压力更有利于超声空化效应的产生;亚临界CO2在理论计算不可能出现超声空化的条件下同样存在空化效应,此现象尚无合理的解释;超声强化亚临界CO2萃取的机理包括空化效应和强化传质.     

HLA-B*6701 as a subtype performing post-selected marking gene for cervical cancer

A method of sequence-based typing (SBT) has been adopted to assort types of exons 2 and 3, which have the most polymorphism, of HLA-B locus of the Tujia nation group in Hubei province. The correlation among the HLA-B alleles, human papillomavirus (HPV) infection and cervical cancer risk has also been investigated. Under the condition of resident location and age, race unified, 100 specimens of cancer patients were sampled as a case group, of which 86 were HPV positive and were screened for HLA-B alleles; while 187 specimens were taken from healthy people, of which 92 were HPV negative as a control group. The result shows that by comparing the above mentioned 86 HPV positive cervical cancer group and 92 HPV negative normal group, it was concluded that HLA-B*6701 was only found in the cervical cancer group (p < 0.034), which shows that HLA-B*6701 can be used as an important candidate biological marking gene for generation of cervical cancer in Wufeng county of Hubei province.