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M_(0.05)Ca_(0.95)MnO_3的制备及其热电性能

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中南大学学报（自然科学版） 2011年第6期42卷 1584-1587页

作者：许洁魏长平贾坤长春理工大学材料科学与工程学院吉林长春130022

采用溶胶-凝胶法,以硝酸盐为原料,在常压空气气氛中于1 000℃烧结8 h制备出CaMnO3和M0.05Ca0.95MnO3(M=Sr2.,Sm3+)块体材料。利用X线衍射、扫描电子显微镜等研究材料的物相和微观形貌,考察Sr2.和Sm3+掺杂对CaMnO3的高温热电性能参数Seeb... 详细信息

采用溶胶-凝胶法,以硝酸盐为原料,在常压空气气氛中于1 000℃烧结8 h制备出CaMnO3和M0.05Ca0.95MnO3(M=Sr2.,Sm3+)块体材料。利用X线衍射、扫描电子显微镜等研究材料的物相和微观形貌,考察Sr2.和Sm3+掺杂对CaMnO3的高温热电性能参数Seebeck系数、电阻率和功率因子的影响。研究结果表明:制备的样品具有单一的物相,结构致密;金属离子Sr2.和Sm3+掺杂可以有效地改善其热电性能;当Sm3+的掺杂量为0.05时可获得最佳的热电性能,600℃时功率因子为2.×10-5 W.m-1.K?2.

关键词：溶胶-凝胶法掺杂锰酸钙热电性能

强磁场下Al-Si过共晶合金组织细化原理研究

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材料科学与工艺 2007年第5期15卷 670-672页

作者：张维平袁聪大连理工大学材料科学与工程学院辽宁大连116023

为了改善Al-Si合金性能,研究了强磁场对Al-Si过共晶合金组织的影响.依据热力学和晶粒形核理论,阐述了组织变化的原因.研究表明:当Al-Si过共晶合金在600℃施加强磁场并平行于磁场方向下凝固时,共晶组织被细化,但对初生硅相影响不大;磁场... 详细信息

为了改善Al-Si合金性能,研究了强磁场对Al-Si过共晶合金组织的影响.依据热力学和晶粒形核理论,阐述了组织变化的原因.研究表明:当Al-Si过共晶合金在600℃施加强磁场并平行于磁场方向下凝固时,共晶组织被细化,但对初生硅相影响不大;磁场强度越大,细化效果越明显;强磁场降低了固态熵和磁自由能的影响,使共晶组织临界形核半径减小,而硅由于是逆磁质对其影响不大;强磁场使液态金属平行于磁场方向流动,进一步细化了组织.

关键词：强磁场组织磁化能

Robust Output Tracking for Discrete Quasilinear Systems with Random Disturbance

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Robust Output Tracking for Discrete Quasilinear Systems with...

A Type of Fiber Remote Control Interface With Self-Diagnosis Function

第40届中国控制会议

作者： Da-wei Zhang Guo-ping Liu Center for Control Theory and Guidance Technology Harbin Institute of Technology Department of Artificial Intelligence and Automation Wuhan University

This research proposes an output feedback predictive control scheme to consider a robust output tracking problem for discrete quasilinear systems with random disturbance. This scheme consists of the design of observer and output feedback,and the optimization of tracking performance. Based on the existing method, the generally parametric forms of observer and output feedback are established with two arbitrary parameter matrices. Then, a cost function, aiming at tracking performance,is minimized by the design of predictive control. Finally, a numerical simulation and comparison is given to illustrate the effectiveness of the proposed scheme.

关键词： Discrete quasi-linear systems Random disturbance Robust output tracking Predictive control

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A Type of Fiber Remote Control Interface With Self-Diagnosis...

九味镇心颗粒联合氟哌噻吨美利曲辛片及双歧杆菌四联活菌治疗腹泻型肠易激综合征的临床观察

作者： HU wei-ping YIN Zhi-guo

The 100 MeV cyclotron adopts the digital power supply,which can not only reduce the quantity of the control system cables,but also enhance the power supply ***,the difference between the digital power supply and the analog power supply applied to the 10 MeV CRM cyclotron,has put forward a new demand for the control *** satisfy the requirements of the digital power supply devices that are interconnected with control network,a type of fiber remote control system with self-diagnosis function is developed to connect the power supply with DA662.network device via fiber.

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世界中西医结合杂志 2024年第4期19卷 719-724页

作者：郑香伟杨以良金洋石保平李红汪静李士坤程天厚信阳市中心医院消化内科河南信阳464000 信阳市中心医院医务科河南信阳464000

目的探讨九味镇心颗粒联合氟哌噻吨美利曲辛片及双歧杆菌四联活菌治疗腹泻型肠易激综合征的临床观察。方法选取2.2.年1月—2.2.年1月期间信阳市中心医院收治的100例腹泻型肠易激综合征患者,按随机数字表法分为对照组和研究组,每组各5... 详细信息

目的探讨九味镇心颗粒联合氟哌噻吨美利曲辛片及双歧杆菌四联活菌治疗腹泻型肠易激综合征的临床观察。方法选取2.2.年1月—2.2.年1月期间信阳市中心医院收治的100例腹泻型肠易激综合征患者,按随机数字表法分为对照组和研究组,每组各50例。对照组给予氟哌噻吨美利曲辛联合双歧杆菌四联活菌治疗,研究组在对照组治疗的基础上给予九味镇心颗粒治疗。观察比较两组患者临床疗效、不良反应情况,治疗前后中医证候积分、直肠敏感性(肛管静息压、直肠感知阈值、腹痛阈值、排便阈值)、神经递质[神经递质5-羟色胺(5-Hydroxy Tryptamine,5-HT)、降钙素基因相关肽(Calcitonin gene related ***)、胃肠激素神经肽Y(Neuropeptide Y,NPY)]、二胺氧化酶、D-乳酸、内毒素水平。结果治疗后研究组总有效率98.00%(49/50)明显高于对照组86.00%(43/50),差异有统计学意义(P2.50)明显低于对照组16.00%(8/50),差异有统计学意义(χ^(2.=4.001,P=0.041)。结论九味镇心颗粒联合氟哌噻吨美利曲辛片及双歧杆菌四联活菌能够有效缓解腹泻型肠易激综合征患者临床症状,降低中医证候积分,恢复神经递质水平及肠道屏障功能,疗效显著,安全性高。

关键词：九味镇心颗粒氟哌噻吨美利曲辛片双歧杆菌四联活菌腹泻型肠易激综合征中医证候积分直肠敏感性肠道屏障功能神经递质

Glueball spectrum from Nf=2.lattice QCD study on anisotropic lattices

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Chinese Physics C 2018年第9期42卷 23-36页

作者： wei Sun Long-Cheng Gui Ying Chen Ming Gong Chnan Liu Yu-Bin Liu Zhaofeng Liu Jian-ping Ma Jian-Bo Zhang Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China School of Physics University of Chinese Academy of Sciences Beijing 100049 China Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha 410081 China School of Physics and Center for High Energy Physics Peking University Beijing 100871 China Collaborative Innovation Center of Quantum Matter Peking University Beijing 100871 China School of Physics Nankai University Tianjin 300071 China Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China Department of Physics Zhejiang University Hangzhou Zhejiang 310027 China

The lowest-lying glueballs are investigated in lattice QCD using Nf = 2.clover Wilson fermions on anisotropic lattices. We simulate at two different and relatively heavy quark masses, corresponding to physical pion masses of mπ～938 MeV and 650 MeV. The quark mass dependence of the glueball masses has not been investigated in the present study. Only the gluonic operators built from Wilson loops are utilized in calculating the corresponding correlation functions. In the tensor channel, we obtain the ground state mass to be 2.363（39） GeV and 2.384（67）GeV at mπ～938 MeV and 650 MeV, respectively. In the pseudoscalar channel, when using the gluonic operator whose continuum limit has the form of ∈_ijkTrB_iD_jB_k, we obtain the ground state mass to be 2.573（55） GeV and 2.585（65） GeV at the two pion masses. These results are compatible with the corresponding results in the quenched approximation. In contrast, if we use the topological charge density as field operators for the pseudoscalar, the masses of the lowest state are much lighter（around 1 GeV） and compatible with the expected masses of the flavor singlet qq meson. This indicates that the operator ∈ijk TrBiDjBk and the topological charge density couple rather differently to the glueball states and qq mesons. The observation of the light flavor singlet pseudoscalar meson can be viewed as the manifestation of effects of dynamical quarks. In the scalar channel, the ground state masses extracted from the correlation functions of gluonic operators are determined to be around 1.4-1.5 GeV, which is close to the ground state masses from the correlation functions of the quark bilinear operators. In all cases, the mixing between glueballs and conventional mesons remains to be further clarified in the future.

关键词： glueball pseudoscalar meson topological charge density

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同步多用户长码直扩信号的盲解扩

电子与信息学报 2011年第7期33卷 1748-1751页

作者：张花国魏平电子科技大学电子工程学院成都611731

针对同步多用户长码直扩信号,该文提出了一种低信噪比条件下的盲解扩算法。该算法通过将多用户长码直扩信号建模为含有缺失数据的同步多用户短码直扩信号,采用SVT算法实现扩频码波形序列子空间估计,并在此基础上利用EM算法完成信号的盲... 详细信息

针对同步多用户长码直扩信号,该文提出了一种低信噪比条件下的盲解扩算法。该算法通过将多用户长码直扩信号建模为含有缺失数据的同步多用户短码直扩信号,采用SVT算法实现扩频码波形序列子空间估计,并在此基础上利用EM算法完成信号的盲解扩。计算机仿真表明即使在较低信噪比条件下,该算法也具有优良的盲解扩性能,且与合作解扩性能相近。

关键词：同步多用户长码直扩信号盲解扩缺失数据模型 SVT算法

Experimental research on the effect of RNA interference specific for Smad3 gene on the activated hepatic stellate cells

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Experimental research on the effect of RNA interference spec...

Oxidative Methylation of Toluene with Methane overK-exchanged Y Type Zeolite Catalyst Promoted with Alkali Metal Bromide and Alkali Metal Oxide

中华医学会第十六次全国病毒性肝炎及肝病学术会议

作者： ping li wei Lu Zhang Hong Tianjin Second Peoples Hospital

Objective To construct an eukaryotic expression vector of RNA interference specific for Smad3,and to evaluate the effect of this siRNA on hepatic stellate cells in *** To design psilencer3.1-H1-hygro plasmid expressing short interfering RNAs(siRNA) that target Smad3 gene region by aid of computer designing on Ambion *** plasmid expressing small interfering RNA was transfected into the cultured cells via li-

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Chemical Research in Chinese Universities 1996年第1期12卷 120-124页

作者： ZHOU Ling-ping TAO Ke-yi LI wei SU Ming and LI He-xuan(Department of Chemistry, Nakai University, Tianjin, 300071 )Hideshi Hattori(Hokkaido University, Sapporo, Japan) NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA HOKKAIDO UNIV SAPPOROHOKKAIDO 060JAPAN