水解聚丙烯酰胺与十二烷基磺酸钠微乳液的相互作用

研究了十二烷基磺酸钠(AS)/环己烷/正丁醇/水的微乳液体系与水解聚丙烯酰胺的相互作用.在水解聚丙烯酰胺浓度≤1000ppm条件下,微乳液界面相中的AS不与水解聚丙烯酰胺发生络合;水解聚丙烯酰胺的加入也不破坏微乳液的稳定性.     

氧化铝陶瓷注射成型用黏结剂及混料工艺研究

采用注射成型制备氧化铝陶瓷,分析了热塑性黏结剂含量、混料工艺对氧化铝陶瓷粉末注射成型浆料的流变性、成型性及注射生坯性能的影响.用TG-DSC分析了蜡基黏结剂体系的热特性,用SEM分析了注射成型生坯的显微结构.试验结果表明:选取聚丙烯、石蜡、硬脂酸3种黏结剂的质量比为20∶70∶10,氧化铝质量分数为80%,采用加热搅拌方式进行混料并结合一定的注射成型工艺,可得到成分均匀、无变形、无缺陷的氧化铝陶瓷生坯试样,烧结后试样的密度和抗弯强度较高.     

ZGMn13加热精车表面质量分析

对ZGMn13钢试棒分别进行普通及加热精车试验,结果表明,在同一切削试验条件下,加热精车表面质量较优,表面粗糙度可降低一级;二者纵向粗糙度几乎相同,但加热精车横向粗糙度显著减少;加热精车表面加工硬化程度及深度均明显地小于普通精车;加热精车表层孪晶带细而疏,而普通精车表层孪晶带粗而密,且横向截面还存在明显的鳞刺纤维层,夹杂呈带状分布。加热精车表层亚结构主要为位错,而普通精车主要为孪晶,它可能是加工硬化和形成鳞刺的微观根源。     

DRASTIC指标体系法在大连市地下水易污性评价中的应用

对地下水埋深、含水层的净补偿、岩性、土壤类型、地形、渗流区介质、渗透系数７个参数的评分以及地理信息系统（ＧＩＳ）在评分过程中的应用进行了详细的讨论,所取得的大连市地下水ＤＲＡＳＴＩＣ易污性评价结果对大连市政府制定地下水资源的环境保护与管理措施具有指导作用。该方法可用于我国广大地区的地下水易污性评价。     

广州市生态系统服务功能价值评估

以广州市为例，运用环境经济学的方法对城市生态系统服务功能进行价值评估，并在GIS平台上制定出其服务功能空间分级分布图．其结果表明广州市城市生态系统服务功能总价值为202亿元．如果考虑生态系统的直接经济价值，广州市不同类型生态系统的价值排序为：湿地＞经济林＞农田＞针叶林＞草地＞针阔混交林＞灌木林、疏林＞阔叶林．如果仅考虑其生态服务功能价值(即不考虑直接物质产品价值)，则排序为：湿地＞林地＞草地＞农田．     

基于含拓扑剖面的三维地质建模

提出了一种通过引入剖面中空间要素（多边形－弧段－结点）之间的拓扑关系（邻接、关联 和包含）来生成基于边界表达的三维地质模型的方法。该方法特别适合于剖面中有多个相互 连接的地质体单元的多体建模,而该情况在三维地质建模中比较常见。同时,该方法中使用 的剖面不要求共面或者平行,拓扑信息包含于生成的三维模型中。而且,在用户少量干预的 情况下,结合地质知识,该方法可以建立绝大多数复杂地质模型。基于该方法,开发了一个 三维地质建模与可视化系统,并成功应用到北京市奥运场区的三维地质建模中,结果表明该 方法具有建立实际复杂三维地质模型的能力。     

Proteomic analysis of blast-resistant near-isogenic lines derived from japonica rice,var. Yunyin,infected with Magnaporthe oryzae

Rice blast is one of the most devastating dis- eases in the world and outbreaks occur frequently. The differences in protein expression between blast resistant and susceptible near-isogenic lines （NILs） of japonica rice var. Yunyin infected with Magnaporthe oryzae were ana- lyzed using proteomics, indicated that 67 different proteins were identified from 75 obtained proteins using the matrix- assisted laser desorption/ionization time-of-flight mass spectrometry technique. Seven specific expression proteins, 43 up-regulated proteins and 17 down-regulated proteins were identified among the 67 proteins. The bioinformatical analysis demonstrated that these 67 different proteins were involved in many biological physiological processes including five proteins related to photosynthesis, 25 pro- teins related to metabolism, six proteins related to anti- oxidants, 10 proteins related to protein synthesis and modification, five proteins related to signal transduction,four proteins related to adversity stress and 12 non-func- tional proteins. These identified proteins were directly or indirectly related to stress. Five proteins related to different physiological processes were selected. Their cDNA sequences were predicted and their expression patterns were analyzed using real-time PCR, demonstrated that the genes would response to M. oryzae and the response blindingly different between blast resistant and blast sus- ceptible NILs.     

A method to estimate the steganographic capacity in DCT domain based on MCUU model

In order to estimate maximum steganographic capacity of discrete cosine transform (DCT) domain in JPEG image, this paper presents a method based on the maximize capacity under undetectable model (MCUU). We analyze the relation between steganographic capacity and affecting factors (image size, steganography operator, loading band, embedding intensity and image complexity). Then we design a steganography analyzer architecture and a steganographic algorithm which can dynamically increase the steganographic capacity. Compared with other methods of embedding capacity estimation in DCT domain, the proposed methods utilizes general steganalysis methods rather than one specific steganalysis technique and takes five essential factors into account, which improves the commonality and comprehensiveness of capacity estimation, respectively. The experimental results show that steganographic capacity for quantization index modulation (QIM) is almost twice that of spread spectrum (SS) based on MCUU model.     

论“丝绸之路经济带”与西藏经济外向发展

2013年以来,“丝绸之路经济带”已引起我国最高决策层的重视,即将成为我国和中亚各国共同推进的跨洲区域合作。西藏从唐代起就通过唐蕃古道、茶马古道等古商道、驿道或贡道与古丝绸之路相连接。改革开放以后,西藏经济北向、东向发展步伐加快,通过青藏经济一体化,融入“大西南经济圈”,可以说已经在某种程度上融入了“丝绸之路经济带”。文章通过阐述西藏和丝绸之路的关系,试图说明西藏加入或融入“丝绸之路经济带”的意义及可能性,并对西藏借助该经济带促进自身外向发展提出建议。     

一维超分子化合物[(L~1)(H_4SiMo_(12)O_(40))]·8H_2O的合成、晶体结构及电化学性质

以有机胺分子丙二胺(L1)为配体,利用水热合成方法制备了一个新的基于Keggin型多金属氧酸盐阴离子[Si Mo12O40]4-的有机-无机杂化超分子化合物[(L1)(H4Si Mo12O40)]·8H2O(1),并通过红外光谱和X-射线单晶衍射方法确定了化合物的晶体结构.该配合物分子式为C3H30Mo12N2O48Si,三斜晶系,P 1空间群,a=12.8900(6),b=13.3870(6),c=13.5260(6),α=87.0260(10)°,β=88.6050(10)°,γ=88.2740(10)°,Z=2,V=2329.22(18)3,Mr=2041.64,Dc=2.888 g/cm3,F(000)=1896,μ=3.259 mm-1,S=1.077,R=0.0504,wR=0.1513.晶体结构分析表明,该化合物是由离散的多金属氧酸盐簇H4Si Mo12O40和丙二胺分子L1组成,两种组分间通过氢键作用形成一维超分子带状链结构.利用循环伏安法研究了目标化合物修饰碳糊电极的电化学行为及其对NO2-还原的电催化性能.CCDC:1040790.