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钢—混凝土组合梁桥结构振动特性测试与计算分析

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市政技术 2003年第3期21卷 131-136页

作者：毛健崔玉萍南海交通建设集团广东省南海市528200 北京市市政工程研究院北京市西城区100037

通过对某桥的动态测试进行模态分析,描述该桥的自振特性,并总结了通过动态试验及计算进行桥梁检测和评估的要点。

关键词：组合梁桥自振频率振型阻尼比钢-混凝土组合梁桥

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动物骨中痕量元素铅和镉测定方法的研究

光谱学与光谱分析 1998年第3期18卷 359-362页

作者：卜海富周健刘玉萍孙昕张胜义安徽医科大学第一附属医院骨科安徽医科大学第一附属医院肿瘤实验室安徽大学化学系

本文建立了一种用石墨炉原子吸收光谱法测定动物骨中的痕量Ｐｂ和Ｃｄ的方法，试样以ＴＭＡＨ溶解后直接测定，方法简便。快速，回收率为９６９５～１０３１５％，相对标准偏差小于４８１％。

关键词：铅镉测定分析生物样动物骨骼骨骼

优选高压注浆机主控参数——应用遗传算法、优化设计和神经网络耦合技术

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陶瓷 1998年第6期 31-34页

作者：尹坚周毓萍周迪勋国家建材局咸阳陶瓷研究设计院 712000 武汉工业大学 430070

论述了遗传算法、优化设计及神经网络的耦合技术,以压力注浆机的主控制参数作为样本,采用这种耦合技术,将实际工程参数转化为遗传进化样本,再通过优化技术变成最优样本,来训练神经网络系统,旨在提高控制参数质量.

关键词：耦合技术遗传算法神经网络陶瓷注浆机高压

Synthesis of cyclometalated iridium complexes with oxadiazole ligands and studies on their electrophosphorescence in PLEDs

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Synthesis of cyclometalated iridium complexes with oxadiazol...

Crystal structure,chemical bond characteristics,infrared reflection spectrum,and microwave dielectric properties of Nd_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9) ceramics

中国化学会第四届有机化学学术会议

作者： Zhonglian Wu Yu Liu jianren Li jian Liu yuping Yang Quan Gan Changyun jiang Yong Cao Weiguo Zhu College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, P. R. China Institute of Polymer Optoelectronic Material and Devices, South China University of Technology, Guangzhou 510640, Guangdong, P. R. China

＜正＞Three 1,3,4-oxadiazole derivatives-based cyclometalated ligands were synthesized by a series of reactions such as esterification, hydrazinolysis, diaroylhydrazide and dehydration. Their corresponding bis-cyclometalated iridium complexes were further synthesized by chloride-bridged and debridged reactions. The molecular structures of synthesized cyclometalated ligands and bis- cyclometalated iridium complexes were characterized by 1HNMR, element analysis and GC-MS.

关键词： Cyclometalated indium complex Electrophosphorescence Polymer emitting diodes (PLEDs).

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Journal of Advanced Ceramics 2023年第1期12卷 82-92页

作者： jian BAO yuping ZHANG Hideo KIMURA Haitao WU Zhenxing YUE School of Environmental and Material Engineering Yantai UniversityYantai 264005China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Microwave dielectric ceramics(MWDCs)with low dielectric constant and low dielectric loss are desired in contemporary society,where the communication frequency is developing to high frequency(sub-6G).Herein,Nd_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9)(NZ_(1−x)T_(x)M,x=0.02-0.10)ceramics were prepared through a solid-phase *** to X-ray diffraction(XRD)patterns,the ceramics could form a pure crystal structure with the R3c(167)space *** internal parameters affecting the properties of the ceramics were calculated and analyzed by employing Clausius-Mossotti relationship,Shannon’s rule,and Phillips-van Vechten-Levine(P-V-L)***,theoretical dielectric loss of the ceramics was measured and analyzed by a Fourier transform infrared(IR)radiation ***,when x=0.08 and sintered at 700℃,optimal microwave dielectric properties of the ceramics were obtained,including a dielectric constant(ε_(r))=10.94,Q·f=82,525 GHz(at 9.62 GHz),and near-zero resonant frequency temperature coefficient(τ_(f))=−12.99 ppm/℃.This study not only obtained an MWDC with excellent properties but also deeply analyzed the effects of Ti^(4+)on the microwave dielectric properties and chemical bond characteristics of Nd_(2)Zr_(3)(MoO_(4))_(9)(NZM),which laid a solid foundation for the development of rare-earth molybdate MWDC system.

关键词： microwave dielectric ceramics(MWDCs) Nd_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9)(NZ_(1−x)T_(x)M) Phillips-van Vechten-Levine(P-V-L)theory theoretical dielectric loss

Steady-state Voltage Security-constrained Optimal Frequency Control for Weak HVDC Sending-end AC Power Systems

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 658-669页

作者： Qiangqiang Wang Liangzhong Yao jian Xu yuping Zheng Wei Li Wei Wang School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network(Wuhan University) Wuhan 430072China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation(State Grid Electric Power Research Institute)Nanjing 211106China

Due to the fact that a high share of renewable energy sources(RESs)are connected to high-voltage direct current(HVDC)sending-end AC power systems,the voltage and frequency regulation capabilities of HVDC sending-end AC power systems have *** has resulted in potential system operating problems such as overvoltage and overfrequency,which occur simultaneously when block faults exist in the HVDC *** this study,a steady-state voltage security-constrained optimal frequency control method for weak HVDC sending-end AC power systems is *** integrated virtual inertia control of RESs is employed for system frequency *** dynamic reactive power compensation devices are utilized to control the voltage of all nodes meet voltage security ***,an optimization model that simultaneously considers the frequency and steady-state voltage security constraints for weak HVDC sending-end AC power systems is *** optimal control scheme with the minimum total cost of generation tripping and additional dynamic reactive power compensation required is obtained through the optimization *** are conducted on a modified IEEE 9-bus test system and practical Qing-Yu line commutated converter based HVDC(LCC-HVDC)sending-end AC power system to verify the effectiveness of the proposed method.

关键词： Renewable energy source(RES) high-voltage direct current(HVDC) AC power system optimal frequency control steady-state voltage security dynamic reactive power compensation

Calcium Ion Coordinated Polyamide Nanofiltration Membrane for Ultrahigh Perm-selectivity Desalination

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Chemical Research in Chinese Universities 2021年第5期37卷 1101-1109页

作者： BIAN Xiangying ZHANG yuping GONG Li ZHU Yuzhang JIN jian i-Lab and CAS Key Laboratory of Nano-Bio Interface CAS Center for Excellence in NanoscienceSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou215123P.R.China College of Chemistry Chemical Engineering and Materials Science&Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou215123P.R.China

Improving the permeate flux but retaining the rejection of thin-film composite(TFC)polyamide nanofiltration(NF)membrane is a high requirement for *** this work,a calcium ion(Ca^(2+))coordinated polyamide(PA)NF membrane was prepared by directly adding CaCl_(2) to the piperazine(PIP)aqueous solution during the interfacial polymerization *** to the coordination interaction between Ca^(2+)and the amide bond in PA active layer.

关键词： process selectivity retaining

Effect of insulin on 1-methyl-4-phenylpyridinium ion-induced apoptosis of PC12 cells

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Neural Regeneration Research 2006年第4期1卷 317-320页

作者： Liping Guo jian Wang yuping jiang Department of Neurology Beijing China-Japan Fnendship Hospital Beijing 100029 China Department of Neurology Huashan Hospital Affiliated to Fudan University Shanghai 200040 China

BACKGROUND： Insulin receptor （IR） expression in the substantia nigra of patients with Parkinson disease （PD） is not only significantly lower than that in the substantia nigra of normal persons of the same age, but also significantly lower than that in other regions in brain of himself/herself. It suggests that the abnormal effect of insulin receptor-mediated insulin, as a neurotrophic factor, is very possibly related to the loss of dopaminergic neurons in the substantia nigra and striatum in patients with Parkinson disease. OBJECTIVE ： TO observe the interventional effect of insulin on 1-methyl-4-phenylpyridinium ion （MPP^＋）-induced apoptosis of PC12. DESIGN： Controlled observation SETTINGS： Department of Neurology, Beijing China-Japan Friendship Hospital; Department of Neurology Huashan Hospital Affiliated to Fudan University. MATERIALS： PC12 cells were provided by the Cell Bank, Shanghai Institute of Cell Biology, Chinese Academy of Science. MPP^＋, MTT, HOECHST 33258 （Invitrogen Life Technologies）, reverse transcription-polymerase chain reaction （RT-PCR） reagent （Takara Shuzo Co., Ltd.）, flow cytometer （Bacton Dickionson, San Jose, CA）, enzyme labelling instrument （Bio-Tek, Winooski, VT） and PCR circulation instrument （Takara Shuzo Co., Ltd） were used in this study. METHODS ： This study was carried out in the Department of Neurology, Huashan Hospital Affiliated to Fudan University during June 2003 to August 2004. （1） Cell culture and experimental grouping： PC12 cells were cultured according to the method from Peng et al, then were randomized into 3 groups; blank control group, MPP^＋ group and insulin group. （2） Detection of relative survival rate of cells： The relative survival rate of cells at different MPP^＋ final concentrations （0, 50, 100, 200, 300, 1 000 μmol/L） and at different culture time （0, 4, 8, 12, 18, 24 hours） in the 300 Fmol/L MPP^＋ group and different concentrations of insulin （0, 15, 50, 100 nmol/L） in the insulin group was detected with

关键词： cell MPP Effect of insulin on 1-methyl-4-phenylpyridinium ion-induced apoptosis of PC12 cells PC 33258 MPTP

复合酶制剂对低蛋白日粮饲养的肉鸡养分表观消化率和肝脏代谢相关酶活性的影响

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黑龙江畜牧兽医 2021年第1期 123-126页

作者：付水广李红美邹志军李火平简瑜平吴国云吴华东江西科技师范大学生命科学学院南昌330013 江西农业大学动物科学技术学院南昌330045 新余市渝水区农业局江西新余338000

为了探讨复合酶制剂对低蛋白日粮饲养的肉鸡养分表观消化率及肝脏代谢相关酶活性的影响,试验将240只1日龄商品代肉鸡随机分为6组,对照组饲喂基础日粮;试验Ⅰ~Ⅴ组饲喂蛋白质水平依次降低(0、0.5%、1.0%、1.5%、2.0%)的基础日粮+0.1%复... 详细信息

为了探讨复合酶制剂对低蛋白日粮饲养的肉鸡养分表观消化率及肝脏代谢相关酶活性的影响,试验将240只1日龄商品代肉鸡随机分为6组,对照组饲喂基础日粮;试验Ⅰ~Ⅴ组饲喂蛋白质水平依次降低(0、0.5%、1.0%、1.5%、2.0%)的基础日粮+0.1%复合酶制剂。饲养至42日龄,采集粪便和血清,分别用于测定钙(Ca)、磷(P)和粗蛋白(CP)的表观消化率,以及丙氨酸氨基转移酶(GPT)、天门冬氨酸氨基转移酶(GOT)、碱性磷酸酶(ALP)活性。结果表明:试验Ⅰ组Ca、P、CP的表观消化率均显著高于对照组(P<0.05),血清中ALP活性显著升高(P<0.05),GPT和GOT活性显著下降(P<0.05)。与试验Ⅰ组相比,试验Ⅱ~Ⅴ组Ca、P的表观消化率呈下降趋势,但试验Ⅱ组、Ⅲ组Ca、P的表观消化率仍显著高于对照组(P<0.05),CP的表观消化率呈上升趋势。另外,试验Ⅲ组GOT活性与对照组相比仍显著降低(P<0.05),ALP活性显著升高(P<0.05)。说明在基础日粮中添加0.1%复合酶制剂的同时降低1.0%蛋白质含量仍能改善肉鸡肝脏代谢功能,提高饲料消化利用率,从而减少生产成本。

关键词：复合酶制剂低蛋白日粮肉鸡血液生化指标养分表观消化率