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印制电路信息 2019年第1期27卷 22-24页

作者：何亮张良昌谢旭文珠海杰赛科技有限公司广东珠海519170 广州杰赛电子有限公司广东广州510032 广州杰赛科技股份有限公司广东广州510310

棕化工艺中的铜离子浓度对棕化效果具有显著影响,当铜离子浓度过高时,棕化缸体的底部或缸壁会不断析出黑色结晶;黑色结晶加剧过滤系统的堵塞以及缸体脏污,从而不断降低药水交换速率及药水活性,进而产生棕化不良现象;本文就铜离子在高浓... 详细信息

棕化工艺中的铜离子浓度对棕化效果具有显著影响,当铜离子浓度过高时,棕化缸体的底部或缸壁会不断析出黑色结晶;黑色结晶加剧过滤系统的堵塞以及缸体脏污,从而不断降低药水交换速率及药水活性,进而产生棕化不良现象;本文就铜离子在高浓度状态下产生棕化不良的改善方法进行阐述。

关键词：铜离子棕化不良过滤效果浓度

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Charge Transfer Platform and Catalytic Amplification of Phenanthroimidazole Derivative: A New Strategy for DNA Bases Recognition

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ANALYTICAL CheMISTRY 2019年第18期91卷 11938-11945页

作者： Lu, Nannan Liu, he Huang, Rui Gu, Yue Yan, Xiaoyi Zhang, Tinging Xu, Zhiqian Xu, Haixin Xing, Yue Song, Yu Li, xuwen Zhang, Zhiquan Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China

Research about DNA composition has been concentrated on DNA damage in the past few decades. However, it still remains a great challenge to construct a rapid, facile, and accurate approach for simultaneously monitoring four DNA bases, guanine (G), adenine (A), thymine (T), and cytosine (C). herein, a novel electrochemical sensor based on phenanthroimidazole derivative, 2-(4-bromophenyl)-1-phenyl-1H-phenanthro[9,10-d]-imidazole (PPI), is successfully fabricated by a simple electrochemical method. The bromophenyl group in PI could expand their aromatic plane, induce the pi-conjugated extension, and enhance the charge transfer and pi-pi interaction. The phenyl group at N1 position could regulate the intermolecular interaction, which could promote the possibility of intermolecular connection. The PPI polymer (poly(PPI)) with pi-electron enriched conjugation architecture has been applied in simultaneous determination of G, A, T, and C in neutral solution by square wave voltammetry (SWV) method with well-separated peak potentials at 0.714, 1.004, 1.177, and 1.353 V, respectively. The sensor functionalized with poly(PPI) exhibits wide linear response for G, A, T, and C in the concentration ranges of 3-300, 1-300, 30-800, and 20-750 mu M, respectively. With favorable selectivity, stability, and reproducibility, the sensor is successfully utilized to monitor four DNA bases in real samples, displaying a promising prospect for electrochemical sensing devices.

关键词： Cytosine Genetics Electrodes Oxidation Acid and base chemistry

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Effect of alkali treatment on heavy metals adsorption capacity of sewage sludge

Effect of alkali treatment on heavy metals adsorption capaci...

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2015 International Conference on Environmental Pollution and Public health, EPPH 2015

作者： Hu, Jianlong Yang, Xiaosong Shao, Linan he, xuwen Men, Kunkuo Beijing General Research Institute of Mining and Metallurgy Beijing China Beijing China

Sewage sludge is the promising raw material for biosorbent preparation. In this work, we evaluated the heavy metals adsorption characteristics of alkali treated sewage sludge (ATSS) by equilibrium studies. The adsorption isotherms were fitted with Langmuir and Freundlich models. Comparing with untreated sewage sludge, the total adsorption capacity (qm) of ATSS (prepared with 0.125 mol/L NaOH) for Cd, Pb, Ni, increased by 0.51, 0.70 and 0.32 mmol/g, respectively. When the NaOH concentration for ATSS preparation increased from 0.125 mol/L to 0.25 mol/L, the qm of ATSS for Pb decreased from 1.05 mmol/g to 0.84 mmol/g. However, when the NaOH concentration increased from 0.25 mol/L to 7.5 mol/L, it showed increasing trend. According to the IR spectra data, the adsorption effect of biosorbent for heavy metals was mainly due to the complexation of-N-H groups and-COOH groups.

关键词： Adsorption

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彭泽鲫生长性状的遗传参数估计

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中国农学通报 2020年第33期36卷 134-137页

作者：徐金根曹烈金武何义进邴旭文王建民九江市水产科学研究所江西九江332000 中国水产科学研究院淡水渔业研究中心江苏无锡214081

为深入了解彭泽鲫(Carassius auratus ***)生长性状的遗传变化规律,并以此为基础制定彭泽鲫合理的育种方案。以九江市水产研究所培育的彭泽鲫23个全同胞家系的个体为实验材料,测量这些家系中1冬龄个体的生长性状(总长、体长、体高、体... 详细信息

为深入了解彭泽鲫(Carassius auratus ***)生长性状的遗传变化规律,并以此为基础制定彭泽鲫合理的育种方案。以九江市水产研究所培育的彭泽鲫23个全同胞家系的个体为实验材料,测量这些家系中1冬龄个体的生长性状(总长、体长、体高、体厚、体重),并用动物模型对数据进行遗传分析。结果表明:彭泽鲫1冬龄总长、体长、体高、体厚、体重5个性状的遗传力分别为0.64±0.17、0.51±0.16、0.79±0.18、0.57±0.16、0.65±0.17,均属于高水平遗传力。这5个性状之间表型相关(0.79~0.94)和遗传相关(0.95~1.00)均较高。采用个体选育或者个体选育与家系选择法相结合的方法对彭泽鲫进行遗传改良都能获得较好的遗传进展,且对某一生长性状进行选育时,其他性状也会得到间接改良。

关键词：彭泽鲫生长性状遗传力遗传参数家系选择

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Damage imaging in composite plate by using double-turn coil omnidirectional shear-horizontal wave magnetostrictive patch transducer array

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ADVANCED COMPOSITE MATERIALS 2017年第Sup1期26卷 67-78页

作者： Liu, Zenghua Zhong, xuwen Xie, Muwen Liu, Xiucheng he, Cunfu Wu, Bin Beijing Univ Technol Coll Mech Engn & Appl Elect Technol Beijing 100124 Peoples R China

A double-turn coil omnidirectional shear-horizontal wave magnetostrictive patch transducer (DC-OSH-MPT) array for imaging detection in composite plates is presented. DC-OSH-MPT parameters are optimized in order to make the transducer more suitable for imaging detection. Besides, the characteristic of the lowest shear-horizontal mode (SH0), which can be generated and received in all directions by DC-OSH-MPT bonded on composite plate, is beneficial for imaging. Due to anisotropic property of composite plates, the group velocity of SH0 mode in different azimuthal directions was experimentally measured in damage imaging. The location of simulated damage, which was a bonded circular cylinder, was estimated by DC-OSH-MPT array and ellipse imaging algorithm. The imaging results have demonstrated that DC-OSH-MPT can be considered as a spatially distributed array suitable for imaging detection in composite plates.

关键词： composite plate omnidirectional shear-horizontal wave ellipse imaging magnetostrictive patch transducer array

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Medium-temperature furnace bake of superconducting radio-frequency cavities at ihep

arXiv

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arXiv 2020年

作者： he, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Mi, Zhenghui Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

Recently, heat treatment between 250 °C and 500 °C has been attempted to improve quality factor (Q) of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IheP. Firstly, over ten 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace, which all demonstrated improvement of Q and anti-Q-slope phenomenon. The average quality factor has reached 3.6×1010 when the gradient is 16 MV/m，while the highest Q is 4.9×1010@16MV/m;the maximum gradients of these 1-cell cavities are between 25.1 and 36.9 MV/m. Then, the recipe of mid-T furnace bake at 300 °C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace, which have all shown higher Q and anti-Q-slope at medium field (16~24 MV/m). The average quality factor has reached 3.8×1010 when the gradient is 16 MV/m. The maximum gradients of the 9-cell cavities are between 22.7 and 26.5 MV/m. © 2020, CC0.

关键词： Radio waves

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基于全向性SH0模态磁致伸缩贴片型传感器阵列的铝板缺陷成像研究

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机械工程学报 2018年第14期54卷 8-15页

作者：刘增华钟栩文李欣何存富吴斌北京工业大学机械工程与应用电子技术学院北京工业大学北京市精密测控与仪器工程技术研究中心

板材在生产、运输或使用过程中易产生缺陷,影响板材的使用并造成安全隐患。采用传感器阵列成像技术能够直观、清晰地显示出缺陷的相关信息。SH0模态在铝板中传播时无频散现象,波速恒定,在对信号进行处理时,不需要考虑频散特性带来的影响... 详细信息

板材在生产、运输或使用过程中易产生缺陷,影响板材的使用并造成安全隐患。采用传感器阵列成像技术能够直观、清晰地显示出缺陷的相关信息。SH0模态在铝板中传播时无频散现象,波速恒定,在对信号进行处理时,不需要考虑频散特性带来的影响,有利于缺陷定位和成像。基于磁致伸缩换能机理,研制出一种能在板中激励接收SH波最低阶模态即SH0模态的磁致伸缩贴片型传感器,并测试其全向性。以工程中应用广泛的铝板作为研究对象,运用研制的全向性SH0模态磁致伸缩贴片型传感器布置成分布式传感器阵列。利用椭圆成像算法,实现了铝板中不同直径的模拟缺陷成像检测,探究了全向性SH0模态磁致伸缩贴片型传感器阵列的检测能力,并基于ROC曲线设定成像通用阈值,提高了缺陷成像质量。

关键词：铝板磁致伸缩贴片型传感器 SH0模态缺陷成像阈值

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高温胁迫对2种兜兰叶片生理生化指标的影响

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中国农学通报 2020年第28期36卷 72-77页

作者：陈秀萍贺漫媚王伟李许文郑永晓张继方代色平广州市林业和园林科学研究院广州510405

为筛选并评价兜兰的耐热性指标,以广州迁地引种的‘魔帝’兜兰和‘肉饼’兜兰为材料,通过研究其生理指标叶绿素相对含量(SPAD)、过氧化氢酶(CAT)、过氧化物酶(POD)、丙二醛(MDA)、可溶性蛋白、可溶性糖、脯氨酸含量,研究其在高温胁迫后... 详细信息

为筛选并评价兜兰的耐热性指标,以广州迁地引种的‘魔帝’兜兰和‘肉饼’兜兰为材料,通过研究其生理指标叶绿素相对含量(SPAD)、过氧化氢酶(CAT)、过氧化物酶(POD)、丙二醛(MDA)、可溶性蛋白、可溶性糖、脯氨酸含量,研究其在高温胁迫后(25、32、38℃分别处理5、10、15天)的生理生化反应,利用表观观测和隶属函数法综合分析其耐热性。结果表明,同一栽培条件下,耐热性综合评价‘,肉饼’兜兰>‘魔帝’兜兰。对7个生理指标的耐热系数进行主成分分析,SPAD、CAT和POD 3项指标的累积贡献率达66.92%。研究结果可为2种兜兰在迁地引种及其园林绿化中的应用提供理论依据。

关键词：兜兰高温生理指标耐热性评价

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Effect of Alkali Treatment on heavy Metals Adsorption Capacity of Sewage Sludge

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Journal of Geoscience and Environment Protection 2015年第2期3卷 33-39页

作者： Jianlong Hu Xiaosong Yang Linan Shao xuwen he Kunkuo Men Beijing General Research Institute of Mining & Metallurgy Beijing China China University of Mining and Technology (Beijing) Beijing China

关键词： Sewage Sludge Alkali Treatment heavy Metals Adsorption

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Fe and Mn removal from mining drainage using goaf filling materials obtained from coal mining process

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WATER SCIENCE AND TECHNOLOGY 2015年第11期72卷 1940-1947页

作者： Zhang, Liping Chen, Aolei Qu, Hongbin Xu, Shouqiang Zhang, Xue he, xuwen China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China

Coal gangue, sandy soil and clay (mass ratio 45: 4: 1) as goaf filling materials acquired from coal mining processes were applied to remove Fe and Mn effectively from mining drainage. The results of an adsorption kinetic study showed that the Fe adsorption equation was y = 21.454y + 8.4712, R-2 = 0.9924 and the Mn adsorption equation was y = 7.5409x + 0.905, R-2 = 0.9957. Meanwhile, the goaf filling materials had low desorption capacity (Fe 6.765 mu g/g, Mn 1.52 mu g/g) and desorption ratio (Fe 8.98%, Mn 11.04%). Experiments demonstrated that Fe and Mn from mining drainage could be removed stably at a flow rate of 1.2 L/min, Fe inlet concentration of less than 40 mg/L, Mn inlet concentration of less than 2 mg/L and neutral or alkaline conditions. During a procedure of continuous experiments, the effluent quality could meet the requirement of the 'Code for Engineering Design of Sewage Regeneration-GB503352-2002'. A real-application project using goaf filling materials to treat mining drainage in Shendong coal mine showed that the average cost per ton of mining drainage was about 0.55 RMB, which could bring about considerable economic benefit for coal mining enterprises.

关键词： adsorption and desorption goaf filling materials high concentration of Fe and Mn ion mining drainage sewage regeneration

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