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Composition dependence of giant electrocaloric effect in PbxSr1-xTiO_(3) ceramics for energy-related applications

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Journal of Materiomics 2019年第1期5卷 118-126页

作者： Peng-Zu Ge xiao-dong jian Xiong-Wei Lin Xin-Gui Tang Zhi Zhu Qiu-Xiang Liu Yan-Ping jiang Tian-Fu Zhang Sheng-Guo Lu School of Physics and Optoelectric Engineering Guangdong University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou510006China School of Materials and Energy Guangdong University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou510006China

Pb_(x)Sr_(1-x)TiO_(3)(x=0.30,0.35,0.40,0.45,0.50 and 0.55)ceramics were fabricated by a solid-state reaction *** diffraction data at room temperature show PST samples shift from cubic to tetragonal phase with the increase of Pb^(2+) *** microstructures were observed by scanning electron *** measurement was employed to investigate the ferroelectriceparaelectric phase transition *** dependent polarizationeelectric field hysteresis loops were conducted to study the electrocaloric effect(ECE)of the ferroelectric ceramics by indirect methods over a wide temperature *** measurement of temperature change(DT)at room temperature for all samples can achieve 0.79e1.86 ***'s more,a giant ECE(△T=2.05 K,EC strength(△T/△E)=0.51×10^(-6) K m/V,under 40 kV/cm)was obtained in the sample of x=0.35 near phase transition *** results suggest that the ceramics are promising cooling materials with excellent EC properties for energy related applications.

关键词： Pb_(x)Sr_(1-x)TiO_(3)ceramics Electrocaloric effect Phase transition Energy applications

Effect of occlusal splints for the management of patients with myofascial pain： a randomized, controlled, double-blind study

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Chinese Medical Journal 2013年第12期126卷 2270-2275页

作者： ZHANG Fei-yu WANG xiao-geng dong jian ZHANG Jie-fu Lu Ya-lin Department of Stomatology Beijing An Zhen Hospital Capital Medical University Beijing 100029 China

Background Occlusal splints have been the preferred modalities in the management of myofascial temporomandibular disorders （TMDs）,but now controversy exists in reporting whether they are successful for TMDs *** aim of this study was to give objective evidence to the assessment of treatment effect of occlusal splints for myofascial TMDs patients by clinical assessments and surface electromyography （sEMG） measurements of masseter muscles （MM）.Methods Thirty-six patients （12 males and 24 females） aged 16-57 （38±11） years participated in the *** participants diagnosed with myofascial TMD were randomized into two groups （18 of each）.Patients in the first group （A） were treated with occlusal splints for 1 month,while patients in the second group （B） were treated with placebo （non-occluding palatal） *** assessments were performed at the beginning of the study and 1 month after *** measurements for MM were performed at mandibular postural position （MPP） and maximum intercuspal contacted position （ICP） 1 month after the *** root mean square （RMS） and the median frequency （MF） as linear indices of sEMG data were used to demonstrate muscle activity and muscle *** were analyzed by ANOVA and post hoc SNK *** differences were considered significant at P 〈*** It was found that 89% of group A either completely recovered （39%） or clinically improved （50%）,while only 22% of group B had a spontaneous *** analysis showed that at MPP,the mean of RMS value of MM in group A was lower than that of group B,which shows statistical differences （P 〈0.01）.At ICP,the RMS value of MM in group A was higher than that of group B,which shows statistical differences （P 〈0.01）.At MPP,MF value of MM in group A was higher than that of group B （P 〈0.05）.At ICP,MF value of MM was lower than that of group B （P 〈0.01）.Conclusions Occlusal splint could eliminate or improve the signs and symptoms of TMD patients with myofasc

关键词： surface electromyography myofascialpain occlusal splint masseter muscle temporomandibularjoint disorders

Postcardiac injury syndrome complicating circumferential pulmonary vein radiofrequency ablation for atrial fibrillation

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Chinese Medical Journal 2007年第21期120卷 1940-1942页

作者： TANG Ri-bo LIU xiao-hui dong jian-zeng LIU Xing-peng KANG Jun-ping MA Chang-sheng Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China

Postcardiac injury syndrome （PCIS） is characterized by inflammation of the pericardium, pleura and pulmonary parenchyma following a cardiac injury. It has been described in many patients after a variety of cardiac insults including infarction, surgery, trauma, implantation of a pacemaker, percutaneous coronary angioplasty and radiofrequency ablation of cardiac *** report a rare case of PCIS that occurred after circumferential pulmonary vein radiofrequency ablation for atrial fibrillation （AF）.

关键词： postcardiac injury syndrome atrial fibrillation circumferential pulmonary vein ablation

Reversal of hyperglycemia in diabetic rats by portal vein transplantation of islet-like cells generated from bone marrow mesenchymal stem cells

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World Journal of Gastroenterology 2007年第24期13卷 3342-3349页

作者： xiao-Hong Wu Cui-Ping Liu Kuan-Feng Xu xiao-dong Mao jian Zhu Jing-Jing jiang Dai Cui Mei Zhang Yu Xu Chao Liu Department of Endocrinology First Affiliated Hospital of Nanjing Medical University Nanjing 210029 Jiangsu Province China

AIM: To study the capacity of bone marrow mesenchymal stem cells (BM-MSCs) trans-differentiating into islet-like cells and to observe the effect of portal vein transplantation of islet-like cells in the treatment of streptozotocin-induced diabetic rat. METHODS: BM-MSCs were isolated from SD rats and induced to differentiate into islet-like cells under defined conditions. Differentiation was evaluated with electron microscopy, RT-PCR, immunofluorescence and flow cytometry. insulin release after glucose challenge was tested with ELiSA. Then allogeneic islet-like cells were transplanted into diabetic rats via portal vein. Blood glucose levels were monitored and islet hormones were detected in the liver and pancreas of the recipient by immunohistochemistry. RESULTS: BM-MSCs were spheroid adherent monolayers with high CD90, CD29 and very low CD45 expression. Typical islet-like cells clusters were formed after induction. Electron microscopy revealed that secretory granules were densely packed within the cytoplasm of the differentiated cells. The spheroid cells expressed islet related genes and hormones. The insulin-positive cells accounted for 19.8% and mean fluorescence intensity increased by 2.6 fold after induction. The cells secreted a small amount of insulin that was increased 1.5 fold after glucose challenge. After transplantation, islet-like cells could locate in the liver expressing islet hormones and lower the glucose levels of diabetic rats during d 6 to d ***: Rat BM-MSCs could be transdifferentiated into islet-like cells in vitro . Portal vein transplantation of islet-like cells could alleviate the hyperglycemia of diabetic rats.

关键词： Bone marrow mesenchymal stem cells Trans-differentiation Islet Insulin Transplantation

Electrocatalytic oxidation and determination of dopamine at a carbon ionic liquid electrode modified with nafion-L-aspartic acid composite film

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Journal of Pharmaceutical Analysis 2010年第1期22卷 1-6页

作者： xiao-dong Shangguan,jian-Bin Zheng,Qing-Lin Sheng,Ya-Ping He Institute of Analytical Science,Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry,Northwest University,Xi’an 710069,China Institute of Analytical Science Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry Northwest University Xi'an 710069 China

The electrocatalytic oxidation of dopamine(DA)was studied by electrochemical approaches at a carbon ionic liquid electrode(CILE)modified with the composite film of nafion and L-aspartic acid(NL-CILE).The CILE was fabricated by replacing non-conductive organic binders with a room-temperature hydrophobic ionic liquid,1-butyl-3-methyl-imidazolium *** composite film of NL was used as matrix to adsorb DA and catalyze the oxidation of DA in phosphate buffer solution(PBS).The electrochemical response of DA was investigated at the NL-CILE,the traditional carbon paste electrode(TCPE),CILE and the nafion modified CILE(N-CILE)in 0.1M PBS(pH 7.4),*** results showed the superiority of NL-CILE to N-CILE,CILE and TCPE in terms of provision of higher sensitivity,faster electron transfer and better *** optimum condition,the oxidation peak current was rectilinear with DA concentration range from 0.1μM to 0.1mM,with a detection limit of 0.03μM(S/N=3)by differential pulse *** proposed method was applied to determine DA in samples successfully.

关键词： voltammetry Ionic liquid nafion L-aspartic acid dopamine

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“一战”时期中国对德宣战的历史真相

武汉理工大学学报（社会科学版） 2008年第1期21卷 135-139页

作者：肖建东武汉理工大学政治与行政学院湖北武汉430063

第一次世界大战期间,中国作为一个弱国以对德宣战的方式被动卷入这场大战,表面上纷繁复杂,掺杂着各种政治利益与纷争,但从外交和实际效果来看,实际上是为了维护国家的主权和领土完整,是在帝国主义列强的夹缝中求生存的本能体现。

关键词：中国德国第一次世界大战宣战历史真相

城市化、空间溢出与经济增长——基于空间Durbin面板模型的实证研究

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经济问题 2017年第4期 18-23页

作者：刘晓明刘小勇董建功山西省社会科学院经济研究所山西太原030006 华南理工大学广州国家创新型城市发展研究中心广东广州510006 上海财经大学经济学院上海200433

利用中国1986-2014年省级面板数据实证检验了城市化对经济增长的影响。运用空间面板Durbin模型,将城市化对经济增长影响的总效应分解为直接效应和间接效应。实证结果表明,城市化对经济增长存在显著的正向效应,纳入空间因素之后,城市化... 详细信息

利用中国1986-2014年省级面板数据实证检验了城市化对经济增长的影响。运用空间面板Durbin模型,将城市化对经济增长影响的总效应分解为直接效应和间接效应。实证结果表明,城市化对经济增长存在显著的正向效应,纳入空间因素之后,城市化对经济增长的正向效应更为显著,且间接效应明显高于直接效应。这一结果表明,相邻地区城市化程度的提高会显著提高本地经济发展水平,城市化通过集聚效应和辐射效应对本地区和其他地区经济增长产生影响。因此,城市化过程中政府应充分利用城市化的聚集效应和辐射效应,引导城市集群发展,充分发挥城市化对经济增长的推动作用。

关键词：城市化经济增长空间面板Durbin模型

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辛亥革命对中德关系的影响

武汉大学学报（人文科学版） 2001年第5期54卷 591-597页

作者：肖建东武汉理工大学人文社会科学系湖北武汉430063

辛亥革命促进了中国外交近代化的进程 ,其间中德关系的发展就是一个典型。辛亥革命大大冲击了德国的侵华权益 ,也在客观上促使中德关系走向稳定与互利 ,而辛亥革命的基本精神又促使中德关系最终走向平等。

关键词：辛亥革命中德关系中国德国外交关系

Study on the MEMS Technique of Flat Capacitance Sensor with Double Equipotential Rings in Ultra-precise Optical Measurement

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Study on the MEMS Technique of Flat Capacitance Sensor with ...