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Chinese Physics Letters 2017年第4期34卷 75-78页

作者： Xiang-Mi Zhan Mei-Lan Ha Quan Wang Wei Li Hong-Ling xiao[[ Chun Feng Li-Juan Jiang Cui-Mei Wang[[ xiao-Liang Wang[[ Zhan-guo Wang Key Lab of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 School of Microelectronics University of Chinese Academy of Sciences Beijing 100049 Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices Beijing 100083 3 Department of Electro-mechanics Handan College Handan 05600

Gallium nitride- （GaN） based high electron mobility transistors （HEMTs） provide a good platform for biological detection. In this work, both Au-gated AlInN/GaN HEMT and AlGaN/GaN HEMT biosensors are fabricated for the detection of deoxyribonucleic acid （DNA） hybridization. The Au-gated AIInN/GaN HEMT biosensor exhibits higher sensitivity in comparison with the AlGaN/GaN HEMT biosensor. For the former, the drain-source current （VDS = 0.5 V） shows a clear decrease of 69μA upon the introduction of 1μmolL^-1 （μM） complimentary DNA to the probe DNA at the sensor area, while for the latter it is only 38 μA. This current reduction is a notable indication of the hybridization. The high sensitivity can be attributed to the thinner barrier of the AlInN/GaN heterostructure, which makes the two-dimensional electron gas channel more susceptible to a slight change of the surface charge.

关键词： GaN In Highly Sensitive Detection of Deoxyribonucleic Acid Hybridization Using Au-Gated AlInN/GaN High Electron Mobility Transistor-Based Sensors

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复合同轴生物碳纳米管纤维制备方法

高分子材料科学与工程 2009年第3期25卷 134-137,141页

作者：李梅高珊霍晓艳中国民航大学理学院天津300300 北京航空航天大学材料科学与工程学院北京100083

利用同轴静电纺丝方法制备碳纳米管/生物聚合物的"壳-芯"结构纤维,实验发现碳纳米管加入(质量分数)0.01%能很好与聚合物融为一体,纺出内外层均可以复合碳纳米管的复合纤维,外层直径最大4000 nm、内层为2000 nm,而最小外直径165 nm,外层... 详细信息

利用同轴静电纺丝方法制备碳纳米管/生物聚合物的"壳-芯"结构纤维,实验发现碳纳米管加入(质量分数)0.01%能很好与聚合物融为一体,纺出内外层均可以复合碳纳米管的复合纤维,外层直径最大4000 nm、内层为2000 nm,而最小外直径165 nm,外层壁厚为127 nm,控制方法比单轴静电纺丝复杂,电压提高有利于纤维直径减小,可达到几微米,但纺丝速率达到最大值有一个最佳电压范围,碳纳米管加入提高了纤维的热稳定性,拉伸提高纤维的结晶度。

关键词：同轴静电纺丝生物可完全降解聚(3-羟基丁酸和4-羟基丁酸酯)共聚物碳纳米管(CNTS) 复合纳米纤维

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城市交通拥堵缓解对车辆减排的效益研究

交通运输系统工程与信息 2016年第2期16卷 37-43页

作者：单肖年叶建红陈小鸿同济大学道路与交通工程教育部重点实验室上海201804 现代城市交通技术江苏高校协同创新中心南京210096

城市交通拥堵缓解会释放潜在的交通需求,车辆减排的净效益与交通拥挤程度密切相关.本文利用弹性系数的概念,提出一种考虑潜在交通需求的城市交通拥堵缓解对车辆减排的效益研究方法.研究表明,车辆减排的净效益取决于潜在交通需求与单车... 详细信息

城市交通拥堵缓解会释放潜在的交通需求,车辆减排的净效益与交通拥挤程度密切相关.本文利用弹性系数的概念,提出一种考虑潜在交通需求的城市交通拥堵缓解对车辆减排的效益研究方法.研究表明,车辆减排的净效益取决于潜在交通需求与单车减排效率间的平衡;对不同的污染物,车辆减排的净效益呈现不同的特征.此外,本文探究了私车牌照拍卖政策及快速机动化背景对拥堵缓解后车辆减排的效益影响.最后,定性分析了城市交通拥堵缓解策略对车辆减排的影响.研究成果对评估城市交通拥堵缓解的车辆减排净效益具有重要的理论及实际意义.

关键词：城市交通拥堵缓解车辆减排潜在交通需求交通管理策略

用两种方法分析N-36000-1凝汽器热力性能

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汽轮机技术 2006年第3期48卷 163-166页

作者：汪国山朱晓星上海交通大学机械与动力工程学院上海200030 湖南省电力试验研究院长沙410007

首先利用自行开发的凝汽器数值模拟程序对N-36000-1型凝汽器的设计工况热力性能进行了数值分析。然后通过定义凝汽器工程设计方法———“表面式凝汽器标准”中的清洁系数与数值模拟方法中的污垢热阻之间的关系式,分别利用这两种方法计... 详细信息

首先利用自行开发的凝汽器数值模拟程序对N-36000-1型凝汽器的设计工况热力性能进行了数值分析。然后通过定义凝汽器工程设计方法———“表面式凝汽器标准”中的清洁系数与数值模拟方法中的污垢热阻之间的关系式,分别利用这两种方法计算了该凝汽器在不同的冷却水速度、温度和管侧污垢等一系列对应工况下凝汽器的传热率和蒸汽凝结率。通过对这些计算结果的比较与分析,指出冷却水速度、温度这两种影响因素在这两种计算方法的影响趋势虽然相似,但它们在工程设计方法中的影响更大。

关键词：电站凝汽器热力性能数值模拟工程设计

MiR-210 expression reverses radioresistance of stem-like cells of oesophageal squamous cell carcinoma

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World Journal of Clinical Oncology 2014年第5期5卷 1068-1077页

作者： Xin Chen Jia guo Ru-Xing Xi Yu-Wei Chang Fei-Yang Pan xiao-Zhi Zhang Radiation Department First Affiliated Hospital of Medical School of Xi'an Jiaotong University School of Medicine Queen's University Kingston K7L3N6 Ontario Canada

AIM: To investigate the expression of miR-210 and the role it plays in the cell cycle to regulate radioresistance in oesophageal squamous cell carcinoma(ESCC). METHODS: Mi R-210 expression was evaluated in 37 pairs of ESCC tissues and matched para-tumorous normal oesophageal tissues from surgical patients who had not received neoadjuvant therapy, and in the cells of two novel radioresistant cell lines, TE-1R and Eca-109 R, using quantitative reverse transcription-polymerase chain reaction(q RT-PCR). The transient up-regulation of mi R-210 expression in TE-1R and Eca-109 R cells was studied using liposomes and was confirmed using qR T-PCR. The rate of cell survival after a series of radio-treatment doses was evaluated using the cloneformation assay. Flow cytometry was used to detect the changes to the cell cycle patterns due to radiation treatment. RT-PCR and Western blot were used to detect the expression of ataxia telangiectasia mutated(ATM) and DNA dependent protein kinase(DNA-PKcs) after irradiation, and the cell sphere formation assay was used to evaluate the proliferative ability of the cancer stem-like ***: The level of mi R-210 expression was significantly decreased, by 21.3% to 97.2%, with the average being 39.2% ± 16.1%, in the ESCC tissues of most patients(81.1%, 30 of 37 vs patients with high mi R-210 expression, P 0.05). Early local recurrences(< 18 mo, n = 19) after radiotherapy were significantly related with low miR-210 expression(n = 13, P < 0.05). The level of mi R-210 was decreased by approximately 73%(vs TE-1, 0.27 ± 0.10, P < 0.01) in the established radioresistant TE-IR cell line and by 52%(vs Eca-109, 0.48 ± 0.17, P < 0.05) in the corresponding Eca-109 R line. Transient transfection with a mi R-210 precursor increased the level of mi R-210 expr

关键词： MiR-210 Oesophageal squamous cell carcinoma Radiation resistance Cell cycle arrest Stem-like cells

Contrast between 2D inversion and 3D inversion based on 2D high-density resistivity data

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Transactions of Nonferrous Metals Society of China 2014年第1期24卷 224-232页

作者：冯德山戴前伟肖波中南大学地球科学与信息物理学院长沙410083 有色金属成矿预测教育部重点实验室长沙410083

The 2D data processing adopted by the high-density resistivity method regards the geological structures as two degrees, which makes the results of the 2D data inversion only an approximate interpretation;the accuracy and effect can not meet the precise requirement of the inversion. Two typical models of the geological bodies were designed, and forward calculation was carried out using finite element method. The forward-modeled profiles were obtained. 1% Gaussian random error was added in the forward models and then 2D and 3D inversions using a high-density resistivity method were undertaken to realistically simulate field data and analyze the sensitivity of the 2D and 3D inversion algorithms to noise. Contrast between the 2D and 3D inversion results of least squares inversion shows that two inversion results of high-density resistivity method all can basically reflect the spatial position of an anomalous body. However, the 3D inversion can more effectively eliminate the influence of interference from Gaussian random error and better reflect the distribution of resistivity in the anomalous bodies. Overall, the 3D inversion was better than 2D inversion in terms of embodying anomalous body positions, morphology and resistivity properties.

关键词： high-density resistivity method finite element method forward simulation least square inversion 2D inversion 3D inversion apparent resistivity

A hybrid machine learning optimization algorithm for multivariable pore pressure prediction

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Petroleum Science 2024年第1期21卷 535-550页

作者： Song Deng Hao-Yu Pan Hai-Ge Wang Shou-Kun Xu xiao-Peng Yan Chao-Wei Li Ming-guo Peng Hao-Ping Peng Lin Shi Meng Cui Fei Zhao School of Petroleum and Natural Gas Engineering Changzhou UniversityChangzhou213164JiangsuChina Tubular Goods Research Institute of CNPC Beijing102249China CNPC Engineering Technology R&D Company Limited Beijing102206China

Pore pressure is essential data in drilling design,and its accurate prediction is necessary to ensure drilling safety and improve drilling *** methods for predicting pore pressure are limited when forming particular structures and *** this paper,a machine learning algorithm and effective stress theorem are used to establish the transformation model between rock physical parameters and pore *** study collects data from three *** 1 had 881 data sets for model training,and Wells 2 and 3 had 538 and 464 data sets for model *** this paper,support vector machine(SVM),random forest(RF),extreme gradient boosting(XGB),and multilayer perceptron(MLP)are selected as the machine learning algorithms for pore pressure *** addition,this paper uses the grey wolf optimization(GWO)algorithm,particle swarm optimization(PSO)algorithm,sparrow search algorithm(SSA),and bat algorithm(BA)to establish a hybrid machine learning optimization algorithm,and proposes an improved grey wolf optimization(IGWO)*** IGWO-MLP model obtained the minimum root mean square error(RMSE)by using the 5-fold cross-validation method for the training *** the pore pressure data in Well 2 and Well 3,the coefficients of determination(R^(2))of SVM,RF,XGB,and MLP are 0.9930 and 0.9446,0.9943 and 0.9472,0.9945 and 0.9488,0.9949 and *** achieves optimal performance on both training and test data,and the MLP model shows a high degree of *** indicates that the IGWO-MLP is an excellent predictor of pore pressure and can be used to predict pore pressure.

关键词： Pore pressure Grey wolf optimization Multilayer perceptron Effective stress Machine learning

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喷水对半闭环燃气轮机循环的影响

工程热物理学报 2008年第1期29卷 9-12页

作者：单晓明 S A Sjolander 南京航空航天大学能源与动力学院江苏南京210016 中国航空动力机械研究所湖南株洲412002 加拿大卡尔顿大学渥太华K1S5B6

本文对燃气轮机的简单循环、开环和半闭环系统,分别以空气和CO_2作为工质、纯氧为氧化物、天然气为燃料时的热力循环过程,在喷水及不喷水条件下,利用自行设计的分析软件进行了较为系统的数值分析和性能评估,详尽分析了喷水量对使用空气... 详细信息

本文对燃气轮机的简单循环、开环和半闭环系统,分别以空气和CO_2作为工质、纯氧为氧化物、天然气为燃料时的热力循环过程,在喷水及不喷水条件下,利用自行设计的分析软件进行了较为系统的数值分析和性能评估,详尽分析了喷水量对使用空气或CO_2作为工质的半闭环燃气轮机循环的影响,揭示了适量喷水有助于提高循环效率和输出功率的客观规律,为研制CO_2零排放的高效燃气轮机装置奠定了坚实的理论基础。

关键词：燃气轮机半闭环 O2/CO2燃烧喷水零排放

Laser irradiation of graphite foils as robust current collectors for high-mass loaded electrodes of supercapacitors

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Rare Metals 2022年第12期41卷 4094-4103页

作者： Xi-Tong Sun Yi Wan Bin Wang Qian Xu xiao-Ling Teng Hai-Yan Liu Yu-Juan Wang Shi-Wei guo Cheng-Hao Wu Han Hu Ming-Bo Wu State Key Laboratory of Heavy Oil Processing Institute of New EnergyCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China School of Chemistry Lancaster University New Energy Division Shandong Energy Group Co.LtdZoucheng 273500China

Conductive substrates with low cost,lightweight,and chemical stability have been highly recognized as alternative current collectors for energy storage *** foil is promising to fulfill these requests,whereas the inert surface chemistry denies its possibility as the carrier with high-mass loading active ***,we report a facile yet efficient laser-mediated strategy to fast regulate graphite foils for robustly loading active *** smooth and hydrophobic graphite foil surface turned to be a rough,super-hydrophilic one containing oxygen-rich clusters after *** reconstructed surface affords anchors for active species,such as nanostruetured MnO_(2),FeOOH,and Fe_(2)O_(3),with the highest loading mass of 20 mg·cm^(-2).The high-mass loading MnO_(2)electrode offers an areal capacitance of 3933 mF·cm^(-2)at 1 mA·cm^(-2).Then,the asymmetric supercapacitor,fabricated by MnO_(2)and Fe_(2)O_(3)deposited laser-irradiated graphite foils,exhibits improved performance with high energy density,large power capability,and long-term *** strategy suggests a reliable way to produce alternative current collectors for robust energy storage devices.

关键词： Laser irradiation Graphite foils High-mass loading Current collectors Supercapacitors

基于灰关联分析的K匿名方法及其在聚类中的应用

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系统工程与电子技术 2011年第9期33卷 2139-2143页

作者：郭昆张岐山福州大学数学与计算机科学学院福建福州350108 福州大学管理学院福建福州350108

采用泛化和抑制技术对数据进行K匿名化处理,需要在数据的有用性和隐私保护度之间保持平衡。提出一种新的利用基于差异信息理论的灰关联分析实现K匿名的方法,利用数据序列之间的均衡接近度描述数据点之间的相似程度,据此进行相应的泛化... 详细信息

采用泛化和抑制技术对数据进行K匿名化处理,需要在数据的有用性和隐私保护度之间保持平衡。提出一种新的利用基于差异信息理论的灰关联分析实现K匿名的方法,利用数据序列之间的均衡接近度描述数据点之间的相似程度,据此进行相应的泛化和抑制操作,并将K匿名后的数据应用于聚类分析。在真实数据集上的测试验证了该方法的有效性。

关键词：聚类 K匿名灰关联分析