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2011 International Conference on Remote Sensing, Environment and Transportation Engineering最新文献

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Effect of the preheating temperature and polarization treatment on the electrical properties of 0–3 PZT/IPN piezoelectric composites 预热温度和极化处理对0-3 PZT/IPN压电复合材料电性能的影响
D. Tang, Xuelian Wu, Xiuling Lin
Lead zirconate titanate(PZT)/IPN piezoelectric composites with 0–3 connectivity consisting in PZT ceramic powder with nanoscale and Interpenetrating Polymer Networks(IPN) matrix were prepared through solution mixing method. The composites were polarized at 130 °C for 45 min under the electric field of 6.5 kV. The relationship of the preheating temperature of PZT and the electrical properties were studied and the effects of the polarization treatment of the piezoelectric phase on the electrical properties of 0–3 composites were investigated. The results showed that, with the same preheating temperature, the dielectric constant of PZT increased and the dielectric loss of PZT decreased after the polarization treatment. The dielectric constant and the piezoelectric constant of the composites with the polarized PZT in 0–3 piezoelectric composites both declined, whereas the dielectric loss changed unobvious.
采用溶液混合法制备了纳米级锆钛酸铅(PZT)陶瓷粉和互穿聚合物网络(IPN)基体,具有0-3连通性的PZT /IPN压电复合材料。复合材料在6.5 kV电场下,在130℃下极化45 min。研究了压电相预热温度与复合材料电性能的关系,以及压电相极化处理对复合材料电性能的影响。结果表明:在预热温度相同的情况下,极化处理后的PZT介电常数增大,介电损耗减小;0-3压电复合材料中PZT极化后的介电常数和压电常数均下降,而介电损耗变化不明显。
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引用次数: 0
Micropropagation and bulblet growth of Lanzhou lily affected by plant growth regulators, sucrose and segments position 植物生长调节剂、蔗糖和花节位置对兰州百合微繁和鳞茎生长的影响
Tao Zhang, Jing-long Liang, Yan Zou, Ron-chong Li
A protocol for micropropagation of Lanzhou lily (Lilium davidii), an edible and ornamental plant in China was developed. The best results for bulblet formation, mean number of bulblets per explant, fresh weight and other bulblet regeneration parameters were obtained on the basal portion of the excised bulbscales on MS medium supplemented with 0.5 mg·L−1 NAA + 0.5 mg·L−1 BAP and 6–9% sucrose. 100% shoots were rooted on half-strength MS media containing 0.1 mg·L−1 NAA. After rooting the cloned plantlets were successfully hardened to ex vitro conditions and 95% of the regenerated plantlets survived normally in the soil.
研究了兰州百合(Lilium davidii)的微繁技术方案。在添加了0.5 mg·L−1 NAA + 0.5 mg·L−1 BAP和6-9%蔗糖的MS培养基上,切除鳞片基部的鳞茎形成、平均每个外植体鳞茎数、鲜重和其他鳞茎再生参数的效果最好。在含0.1 mg·L−1 NAA的半强MS培养基上100%生根。生根后,克隆苗成功地硬化到离体条件,95%的再生苗在土壤中正常成活。
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引用次数: 0
Characterization of microbial community structure of anaerobic baffled reactor-integrated oxidation ditch-biological aerated filter for landfill leachate treatment 厌氧折流板反应器-一体化氧化沟-曝气生物滤池处理垃圾渗滤液的微生物群落结构特征
Yudong Xu, Xiaofang Chen
To provide microbial evidence for technique improvement of anaerobic baffled reactor (ABR) - integrated oxidation ditch - biological aerated filter (BAF) combined processes for landfill leachate treatment, microbial community structure of the treatment system under different recycle ratios were investigated by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) combined with sequencing and phylogenetic analysis. The results indicated that, under high recycle ratio, microbial community structure changed slightly along with reactor and running time, and microbial community diversity in the anaerobic part of ABR had no significant change, but reduced in the anoxic part of ABR, oxidation ditch and BAF with the increase of recycle ratio. Sequencing results revealed that there may be other denitrification modes of autotrophic denitrification and anaerobic ammonia oxidation in ABR besides conventional biological denitrification. It concluded that the systemic population diversity indexes decreased, and the phase separation of acidogenesis and methanogenesis was destroyed longitudinally down the ABR with high recycle ratio, which illustrated the decrease of running stability of the treatment system. The results provide some valuable references for design and operation of the treatment system.
为了为厌氧折流板反应器(ABR) -一体化氧化沟-曝气生物滤池(BAF)联合处理垃圾渗滤液的工艺改进提供微生物依据,采用聚合酶链反应-变性梯度凝胶电泳(PCR-DGGE)技术结合测序和系统发育分析,研究了不同循环比下处理系统的微生物群落结构。结果表明,在高循环比条件下,微生物群落结构随反应器和运行时间变化不大,ABR厌氧部分微生物群落多样性变化不显著,而ABR缺氧部分、氧化沟和BAF微生物群落多样性随着循环比的增加而减少。测序结果表明,ABR除常规生物反硝化外,还可能存在自养反硝化和厌氧氨氧化等反硝化模式。结果表明,在高循环率的ABR下,系统种群多样性指数下降,产酸和产甲烷的相分离被纵向破坏,说明处理系统运行稳定性下降。研究结果为污水处理系统的设计和运行提供了有价值的参考。
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引用次数: 0
Comparison analysis on thermal performances of dual airflow windows 双气流窗热工性能对比分析
Bo Sun, Jianing Zhao, Jingshu Wei
To improve the development research of dual airflow windows, two kinds of dual airflow windows with the different frame materials have been studied respectively under the static and dynamic conditions. Under the static condition, the thermal performances of these windows were evaluated by heat transfer coefficient. Via the hot-box experiments, heat transfer coefficients were obtained: the aluminum-alloy window is 3.16W/(m2.K) and the aluminum clad wood window is 1.6W/(m2.K). Under the dynamic condition, the comprehensive energy demand was chosen to represent the thermal performances, which was measured in the dynamic energy demand laboratory for one week in the winter. The results show that the differences of the full-day and hourly energy demand are very little between the aluminum-alloy windows and the aluminum clad wood windows. It has been found that solar radiation has an important impact on energy demand: the southward dual airflow windows don't consume energy at noon and frost is rare.
为了完善双气流窗的开发研究,分别在静态和动态条件下对两种不同框架材料的双气流窗进行了研究。在静态条件下,用换热系数来评价这些窗的热性能。通过热箱实验,得到了换热系数:铝合金窗为3.16W/(m2.K),铝包木窗为1.6W/(m2.K)。在动态工况下,选择综合能源需求来代表其热性能,并在冬季的动态能源需求实验室进行了为期一周的测量。结果表明:铝合金窗与铝包木窗的全天和小时能量需求差异很小;研究发现,太阳辐射对能量需求有重要影响:向南的双气流窗在中午不消耗能量,很少结霜。
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引用次数: 0
Building integrative transportation data base based on remote sensing technology and aplication 基于遥感技术与应用的综合交通数据库建设
Liya Liu, Yuelong Su
Great changes have already been and are still taking place in Chinese economic and social life since early 90s, which as a result brings significant pressure to the transportation systems of almost all Chinese big cities. By the researching currently, not only traffic signal control systems but also traffic guidance and services systems, are all strategies used in two-dimension. Building integrative transportation data base based on remote sensing technology can construct transport management systems in there-dimension. This paper analyzes how to combine remote sensing technology with transport management, puts forward formation of integrative transport data base and describes its applications in the future.
自上世纪90年代初以来,中国的经济和社会生活已经并仍在发生巨大的变化,这给几乎所有中国大城市的交通系统带来了巨大的压力。从目前的研究来看,无论是交通信号控制系统还是交通引导和服务系统,都采用了二维的策略。基于遥感技术构建综合交通数据库,可以构建立体交通管理系统。分析了如何将遥感技术与交通管理相结合,提出了综合交通数据库的形成,并对其应用前景进行了展望。
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引用次数: 0
Preparation and magnetic research of ZnFe2O4 nanoparticles by carbon adsorption 碳吸附法制备纳米ZnFe2O4及其磁性研究
C. Li, W. Feng
With inorganic salt solution as the raw materials, ZnFe2O4 nanoparticles was successfully prepared by the carbon adsorption method.The samples were characterized by XRD, SEM and VSM. The XRD results show that the high purity ZnFe2O4 nanoparticles can be prepared at 500 °C. SEM observation reveals that the as-prepared ZnFe2O4 nanoparticles have a uniform particle size, and the particles are almost spherical without any agglomeration, the “S” shape hysteresis loops of ZnFe2O4 nanoparticles explain that the samples display superparamagnetic under room temperature.
以无机盐溶液为原料,采用碳吸附法制备了纳米ZnFe2O4。采用XRD、SEM和VSM对样品进行了表征。XRD结果表明,在500℃的温度下可以制备出高纯度的ZnFe2O4纳米颗粒。SEM观察表明,制备的纳米ZnFe2O4颗粒粒径均匀,颗粒基本呈球形,无团聚现象,纳米ZnFe2O4的“S”形磁滞回线说明纳米ZnFe2O4在室温下具有超顺磁性。
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引用次数: 0
Domestication of strain SYSHHJ1 and its biodegradation of cyclohexane 菌株SYSHHJ1的驯化及其对环己烷的生物降解
Liang Li, Hongtao Sun, Xu Yang
The synergistic domestication and culture conditions are studied and quantity of adding cyclohexanol and cyclohexanone to culture medium is fixed: 0.6mL·L−1 (culture medium). A bacterial strain SYSHHJ1 using cyclohexane as the sole source of carbon and energy was obtained by synergistic domestication culture. And then effect of growth conditions such as culture times, cyclohexane mass concentration, pH, salt concentration and temperature on strain SYSHHJ1 is studied, and orthogonal experiment is designed, the optional culture conditions of the strain were obtained as: culture time is 84∼108 h, cyclohexane mass concentration is 480mg·L−1, pH is 6, salt concentration is 10g·L−1, temperature is 30°C. Metabolic product is analyzed by HPLC and the result proved also that cyclohexane can be utilized by strain SYSHHJ1.
研究了协同驯化和培养条件,培养基中添加环己醇和环己酮的量固定为0.6mL·L−1(培养基)。通过协同驯化培养获得了一株以环己烷为唯一碳源和能量源的菌株SYSHHJ1。然后研究了培养次数、环己烷质量浓度、pH、盐浓度和温度等生长条件对菌株SYSHHJ1的影响,并设计了正交实验,得到菌株的可选培养条件为:培养时间84 ~ 108 h,环己烷质量浓度为480mg·L−1,pH为6,盐浓度为10g·L−1,温度为30℃。利用高效液相色谱法对代谢产物进行分析,证实菌株SYSHHJ1可以利用环己烷。
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引用次数: 0
Biodistribution of curcumin and its derivatives new aspects for curcumin administration 姜黄素及其衍生物的生物分布。姜黄素给药的新方面
F. Jiang, T. Yu, Xia Liu, Zhishan Ding, Zhelong Ma, Ningchuan Shi
Curcumin, a polyphenolic compound derived from dietary spice turmeric, possesses diverse pharmacologic effects including antioxidant, anti-ininflammatory, antitumor and chemoprotective effects. However, its clinical applications were initially limited by its poor absorption, rapid metabolism and rapid systemic elimination. To improve the bioavailability of curcumin, new approaches have to be taken. Three curcumin derivatives (mPEG2k-Gly-Cur, mPEG2k-Gly-Cur-OA and Cur-OA2) were synthesized in this paper, and their biodistribution was analyzed by HPLC technique. In mice, all compounds were administered i.v. (equal to free curcumin 20 mg/kg), and the results confirmed the rapid clearance of free curcumin in blood and liver, but it was beyond our expectation to observe the remarkable lung tissue accumulation effect of curcumin, with Cmax= 193.12 µg/g after 30 min of administration, and can still be detected with 8.25 µg/g after 4 h. PEGylation can extend the circulation half-life of curcumin, but the effect was limited attributed to the low molecular weight of PEG. PEG co-modify with Oleic acid can increase liver uptake of curcumin. Oleic acid alone esterified curcumin can significantly increase curcumin level in liver, and can be detected with 15.77 µg/g after 4 h. In conclusion, our finding suggested that free curcumin have the lung accumulation property, which implied lung disease therapeutic effect; and it would also be suitable for curcumin to explore pulmonary delivery system so as to increase its bioavailability. Additionally, Oleic acid esterification method could be another way to enhance curcumin activity in certain specific organs, especially in liver.
姜黄素是一种从膳食香料姜黄中提取的多酚类化合物,具有多种药理作用,包括抗氧化、抗炎、抗肿瘤和化学保护作用。但其吸收差、代谢快、全身消除快等特点,限制了其临床应用。为了提高姜黄素的生物利用度,必须采取新的方法。本文合成了3种姜黄素衍生物mPEG2k-Gly-Cur、mPEG2k-Gly-Cur- oa和Cur-OA2,并利用高效液相色谱技术分析了它们的生物分布。在小鼠体内,所有化合物均静脉给药(等于游离姜黄素20 mg/kg),结果证实了血液和肝脏中游离姜黄素的快速清除,但出乎我们意料的是,观察到姜黄素显著的肺组织积累效应,给药30 min后Cmax= 193.12µg/g, 4 h后仍可检测到Cmax为8.25µg/g。但由于PEG分子量低,影响有限。聚乙二醇与油酸共修饰可增加肝脏对姜黄素的吸收。油酸单独酯化姜黄素可显著提高肝脏中姜黄素的水平,4 h后可检测到15.77µg/g。由此可见,游离姜黄素具有肺蓄积性,提示有治疗肺部疾病的作用;研究姜黄素的肺给药系统,提高其生物利用度。此外,油酸酯化法可能是另一种增强姜黄素在某些特定器官,特别是肝脏中的活性的方法。
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引用次数: 4
Temporal-spatial distribution of tropospheric NO2 in China using OMI NO2 column measurements 基于OMI NO2柱测量的中国对流层NO2时空分布
Jie Jiang, Y. Zha
Observations of tropospheric column densities of NO2 obtained from the satellite instruments OMI for the period of 2005 to 2010 are used to derive average monthly and seasonal variations over China. The obtained results indicate that NO2 has an imbalanced spatial distribution with the highest level in North China, Yangtze Rive Delta region and Pearl River Delta region. The seasonal pattern of the NO2 concentration shows a difference between the east and west in China. In the eastern part of China, an expected winter maximum in seasonal cycle is found. In the western part this cycle shows a NO2 maximum in summer time. The NO2 concentration shows a large growth over eastern China during the same period. Correlation analysis reveals that column densities of NO2 is the most closely correlated with coal consumption per unit area and population density.
利用OMI卫星仪器2005 - 2010年的对流层NO2柱密度观测资料,推导了中国地区NO2柱密度的月平均和季节变化。结果表明,NO2的空间分布不平衡,华北、长三角、珠三角地区NO2水平最高;NO2浓度的季节分布在中国东部和西部存在差异。中国东部地区在季节周期中存在冬季极大值。在这个周期的西部,二氧化氮在夏季达到最大值。同期中国东部地区NO2浓度增幅较大。相关性分析表明,NO2柱密度与单位面积煤耗和人口密度相关性最密切。
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引用次数: 0
Research on disease mechanism and safe resistance index of high-grade highway in mining activities 高等级公路采掘病害机理及安全抵抗指标研究
Lei Wang, G. Guo, Meng Gan, Jianfeng Zha
In the urgent need for liberation from the pressure of the coal under high-grade highway, on the basis of having investigated the feasibility of mining under it, researched on the mechanism of its disease in the mining activities, security resistance index of high-grade highway is analyzed from the compositions of structure(Foundation) and linear, according to the norms of order; then, new corresponding resistance index is proposed, combining the results of former study with domestic and foreign literature, namely: horizontal deformation å0 ≤ 2mm/ m; high-grade highway and upgraded highway subsidence w ≤ 300mm; subsidence of secondary roads w ≤ 500mm. This essay is of certain significance for the high-grade highway to carry out mining.
在迫切需要摆脱高等级公路下煤体压力的情况下,在调查高等级公路下煤体开采可行性的基础上,研究了高等级公路下煤体开采病害的机理,从结构(基础)组成和线性组成两方面,按秩序规范对高等级公路的安全抗力指标进行了分析;然后,结合前人的研究成果,结合国内外文献,提出了新的相应阻力指标,即水平变形 0≤2mm/ m;高等级公路及升级公路沉降w≤300mm;二级道路沉降w≤500mm。本文对高等级公路开展矿山开采具有一定的指导意义。
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引用次数: 0
期刊
2011 International Conference on Remote Sensing, Environment and Transportation Engineering
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