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Controllable fabrication of Au micro/nanostructures on self-doped polyaniline nanofibers via electrochemical deposition and its application for DNA immobilization

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Chinese Science Bulletin 2010年第36期55卷 4125-4131页

作者： WANG XinXing YANG tao JIAO Kui Shandong Provincial Key Laboratory of Biochemical Analysis College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China

Four electrochemical methods, cyclic voltammetric deposition, potentiostatic electrodeposition, multi-potential step electrodeposition and three-step electrodeposition, were used to fabricate Au micro/nanostructures on self-doped polyaniline nanofibers-coated glassy carbon electrodes (Au/nanoSPAN/GCEs). The Au micro/nanostructures deposited on the nanoSPAN-modified electrodes were shown by scanning electron microscopy to exhibit different morphologies, such as Au nanoparticle clusters, monodisperse nanoparticles and homogeneously dispersed flower-like microparticles, depending on the deposition method. This phenomenon demonstrates that control over the morphology of Au metal can be easily achieved by adjusting the electrodeposition method. The electrochemical behaviors of the Au/nanoSPAN/GCEs also varied with above four methods, which were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. In comparison with Au nanoparticle clusters and monodisperse Au nanoparticles, homogeneously dispersed flower-like Au microparticles had the largest surface area and obviously enhanced electrochemical response towards the redox reactions of [Fe(CN)6]3–/4– on the modified electrode. DNA immobilization on the Au/nanoSPAN/GCEs was investigated by differential pulse voltammetry using [Fe(CN)6]3–/4– as an indicator. The efficiency of DNA immobilization was inherently related to their different Au micro/nanostructure morphologies. The Au/nano-SPAN/GCE fabricated by three-step electrodeposition showed the largest capacity for immobilization of single stranded DNA, which makes it a promising DNA biosensor.

关键词：单链DNA 电化学沉积纳米纤维纳米结构可控制备固定化聚苯胺自掺杂

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Simulating experiment on the enrichment of precious metals in Lower Cambrian black shale series of Hunan and Guizhou provinces

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Chinese Journal Of Geochemistry 2011年第3期30卷 375-381页

作者： HAN tao ZHU xiaoqing LI Zengsheng The State Key Laboratory of Ore Deposzt Geochemtstry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Adsorption experiments were made at room temperature and neutral pH value on different types of min-erals associated with the Lower Cambrian black shale series polymetallic layers in Hunan and Guizhou provinces on nanometer-sized Pt colloids and PtCl42--bearing ionic solutions with an attempt to constrain the relationship between the different types of minerals in the polymetallic layers and the enrichment of platinum group elements (PGEs). Experimental results showed that the different types of minerals show strong selectivity to the adsorption of nano-meter-sized Pt colloids and PtCl42--bearing ionic solutions. Metallic sulfides, organic matter and clay minerals are the strong adsorbents of PGEs, while quartz, albite, muscovite and other silicate minerals show a week adsorbility to both of them. This phenomenon is well consistent with the geological fact that metallic sulfides, organic matter and clay minerals in the polymetallic layers of the black shale series are the major carrier minerals of PGEs, giving a thorough explanation to the mechanism of enrichment of previous metal elements. Adsorption may be a principal mechanism of enrichment of precious metal elements under lower temperature conditions. The presence of the aforementioned strong adsorbents is the good geochemical barriers for the enrichment of PGEs.

关键词：黑色岩系金属富集模拟实验下寒武统贵州湖南铂族元素金属硫化物

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A Switch Agent for Wireless Sensor Nodes with Dual Interfaces: Implementation and Evaluation

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Tsinghua Science and Technology 2012年第5期17卷 586-598页

作者： tao Zheng Sridhar Radhakrishnan Venkatesh Sarangan School of Computer Science University of Oklahoma Norman OK 73019 USA Chennai Innovation Labs Tata Consultancy Services Chennai 600086 India

Data generation in wireless sensor networks could be bursty as it is dictated by the presence or absence of events of interest that generate these data. While conventional sensor nodes possessed only one radio interface, next generation sensor nodes are expected to have two （possibly more） radio interfaces, each with different ranges, capacities, and power consumptions. Equipping sensor nodes with dual radios has its own benefits and can be quite useful in handling bursty traffic while at the same time satisfying the application＇s delivery requirements. In this paper, we propose an adaptive interface switch agent that intelligently selects the interface to be used for data transmission at a sensor node based on the data burst length or end-to-end delay while taking into consideration power consumption and throughput. The proposed work generalizes earlier works in this area to enable both the source nodes and intermediate data forwarding nodes to initiate the activation of high power radios so that they can be utilized to a higher degree for converge-cast communication. We have performed extensive simulations with sensor nodes containing both IEEE 802.15.4 and IEEE 802.11 compatible radios. Our simulation results indicate that the switch agent yields throughput, delay, and packet delivery ratio comparable to the higher bandwidth interface alone, without incurring much energy wastage.

关键词： wireless sensor networks dual radios switch agent IEEE 802.11 IEEE 802.15.4

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The possibility of isolated target 3-D position estimation and optimal receiver position determination in SS-BSAR

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Science in China(Series F) 2008年第9期51卷 1372-1383页

作者： HU Cheng LONG Teng ZENG tao Radar Research Lab Department of Electronic Engineering Beijing Institute of Technology Beijing 100081China

Starting from the generalized ambiguity function of bistatic SAR （BSAR）, it is shown that 3-D point target estimation can be carried out in space-surface bistatic SAR （SS-BSAR）. Appropriate analytical equations, based on maximum likelihood estimation （MLE）, are derived and confirmed via computer simulation. Furthermore, the performance of the estimate using the Crammer-Rao bound is analyzed for the case in question, thus further revealing the possibility and potential of target 3-D position estimation. Setting the determinant maximum of the information matrix as the criterion, the optimal receiver position and multi-receiver configuration are analytically determined in the SS-BSAR system. Simulation results also validate the correctness of the analytical calculation.

关键词： SS-BSAR position estimation MLE Crammer-Rao bound optimal receiver position

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Formulating for Innovative Self-Compacting Concrete with Low Energy Super-Sulfated Cement Used for Sustainability Development

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Journal of Materials Science and Chemical Engineering 2016年第7期4卷 22-28页

作者： Hoang-Anh Nguyen Ta-Peng Chang Jeng-Ywan Shih chun-tao Chen Department of Civil and Construction Engineering National Taiwan University of Science and Technology (NTUST) (Taiwan Tech) Taiwan Department of Civil Engineering College of Engineering Technology Cantho University Cantho City Vietnam Department of Chemical Engineering Ming Chi University of Technology Taiwan

This study proposed a new way to formulate a low energy super-sulfated cement (SSC) which can be used to produce self-compacting concrete (SCC) with high compressive strength and durability in terms of chloride penetration resistance. This innovative SSC, different from the traditional SSC, was purely produced with a ternary mixture of three industrial by-products of ground granulated blast furnace slag, low calcium Class F fly ash and circulating fluidized bed combustion (CFBC) fly ash and was denoted as SFC-SSC (super-sulfated cement made by mixture of slag, Class F fly ash and CFBC fly ash). Experimental results showed that the combination of a fixed amount of 15 wt.% of CFBC fly ash with various ratios of Class F fly ash to slag could be used to produce the hardened SCCs with high 28-day compressive strengths (41.8 - 65.6 MPa). Addition of Class F fly ash led to the resulting SCCs with lowered price and preferable engineering properties, and thus it was considered as state-of-the-art method to drive such type of concrete towards sustainable construction materials.

关键词： CFBC Fly Ash Fly Ash Slag Super-Sulfated Cement High-Strength Self Compacting Concrete

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Progress of PHA production in transgenic plants

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Chinese Science Bulletin 1999年第19期44卷 1729-1736页

作者： tao Wang Liang Ye Yanru Song Chinese Acad Sci Inst Bot Dept Plant Dev Biol Beijing 100093 Peoples R China

With its completely biodegradable ability, good physical and processing properties, and biocompatability, PHA has become the most attractive alternative to take the place of chemo-plastics and eliminate environmental pollution caused by chemo-plastics. Small-scale commercial production has been realized by bacterial fermentation, but thus produced PHA

关键词： PHA PHB PHBV transgenic plants biodegradable plastics.

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Solving DCLAP-MSN based on hybrid genetic algorithm

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Journal of Systems Engineering and Electronics 2010年第5期21卷 806-811页

作者： Hongtao Lei Bo Guo tao Zhang College of Information Systems and Management National University of Defense Technology Changsha 410073 E R. China

The dynamic capacitated location allocation problem in the military supportive network（DCLAP-MSN） is a representative of combinative optimization problems,and its optimization process is *** this reason,a dynamic capacitated location allocation model is provided ***,a hybrid heuristic algorithm which combines genetic algorithm,repair algorithm of solutions and greedy search,is proposed as the solving *** optimization performance is improved by effectively integrating the repair algorithm of solutions and greedy search with genetic *** experiment results indicate that the proposed algorithm is a feasible and effective method for the problem.

关键词： dynamic location allocation military supportive network genetic algorithm repair algorithm greedy search.

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Ultrasonic interventional analgesia in pancreatic carcinoma with chemical destruction of celiac ganglion

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World Journal of Gastroenterology 2006年第20期12卷 3288-3291页

作者： tao Wang Fu-Zhou Tian Zhong-Hong Cai Xu Li tao Cheng Li Shi Qi Cheng Department of The General Hospital of Chengdu Military Command Area Chengdu 610085 Sichuan Province China

AIM： To detect the therapeutic effects of chemical destruction of celiac ganglion in patients with pancreatic carcinoma with intractable pain. METHODS： Ninety-seven cases with advanced pancreatic carcinoma received chemical destruction of celiac ganglion-5 mL pure alcohol injection around celiac artery under ultrasonic guidance. The changes of visual analogue scale （VAS）, serum substance P （Sub P）, β-endopeptide （β-EP） and T-lymphocyte subtypes level were compared between pre- and post-therapy. RESULTS： Successful rate of puncture was 98.7%, with one failure. No serious complications such as traumatic pancreatitis, pancreatic fistula, abdominal cavity hemorrhage or peritoneal infection occurred. VAS, serum Sub P and β-EP level significantly changed after treatment （8.0 ± 2.3 vs 4.6 ± 2.1, 254.1 ± 96.7 vs 182.4 ± 77.6, 3.2 ± 0.8 vs 8.8 ± 2.1, P 〈 0.01, P 〈 0.05, P 〈 0.01） with complete relief rate 54.2%, partial relief rate 21.9%, ineffective rate 12.5% and recurrent rate 10.7%. The T-lymphocyte subtypes level remarkably increased when compared with that of pre-therapy （46.7 ± 3.7 vs 62.5 ± 5.5, P 〈 0.01）. CONCLUSION： Our study suggests that chemical destruction of celiac ganglion under ultrasonic guidance is highly safe, and can evidently relieve cancer pain and improve the cellular immunity in patients with advanced pancreatic carcinoma.

关键词： Pancreatic carcinoma Analgesia Chemical destruction Ultrasonic intervention Celiac ganglion

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电传动履带车辆横坡直驶控制策略研究

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兵工学报 2008年第3期29卷 257-261页

作者：郭汾孙逢春吴涛北京理工大学机械与车辆工程学院北京100081

推导了横坡直驶动力学模型、预测及控制模型。在对驾驶意图及车辆运动状态识别分析的基础上,对比传统履带横坡直驶控制,提出了一套全新的电传动履带车辆横坡平稳直驶控制思路和方法。针对不同路面变化、不同行驶速度变化的横坡工况,利用... 详细信息

推导了横坡直驶动力学模型、预测及控制模型。在对驾驶意图及车辆运动状态识别分析的基础上,对比传统履带横坡直驶控制,提出了一套全新的电传动履带车辆横坡平稳直驶控制思路和方法。针对不同路面变化、不同行驶速度变化的横坡工况,利用Matlab/Simulink软件对电传动履带车辆横坡平稳直驶控制系统进行了建模与仿真。验证了所建立的模型和所采用的横坡平稳直驶控制策略,并得出了不同工况下的仿真结果。

关键词：机械学电传动履带车辆横坡直驶预测控制

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Joint CTC-Attention End-to-End Speech Recognition with a Triangle Recurrent Neural Net work Encoder

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Journal of Shanghai Jiaotong university(Science) 2020年第1期25卷 70-75页

作者： ZHU tao CHENG chunling School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China

Traditional speech recognition model based on deep neural network(DNN)and hidden Markov model(HMM)is a complex and multi-module *** other words,optimization goals may differ between modules in traditional ***,additional language resources are required,such as pronunciation dictionary and language *** eliminate the drawbacks of traditional model,we hereby propose an end-to-end speech recognition method,where connectionist temporal classification(CTC)and attention are integrated for *** our model,the complex modules are replaced by a single deep *** model mainly consists of encoder and *** encoder is constructed by bidirectional long short-term memory(BLSTM)with a triangular structure for feature *** decoder based on CTC-attention decoding utilizes advanced features extracted by shared encoder for training and *** experimental results on the Vox Forge dataset indicate that end-to-end method is superior to basic CTC and attention-based encoder-decoder decoding,and the character error rate(CER)is reduced to 12.9%without using any language model.

关键词： end-to-end connectionist temporal classification(CTC) att ent ion speech recognition

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