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最佳领导者:学会放开缰绳

商学院 2015年第6期 84-85页

作者： Fred schmalz Kellogg Insight

我们生活存一个创意时代。当今的企业都在竞相以新颖的方式挖掘员工的集体创造力。因此，办公室的桌式足球和天马行空的头脑风暴盛行一时。马丁公司（The Martin Agency）是为政府雇员保险公司（GeICO）推出著名的壁虎形象以及为联合包... 详细信息

我们生活存一个创意时代。当今的企业都在竞相以新颖的方式挖掘员工的集体创造力。因此，办公室的桌式足球和天马行空的头脑风暴盛行一时。马丁公司（The Martin Agency）是为政府雇员保险公司（GeICO）推出著名的壁虎形象以及为联合包裹公司（UPS）创编企业广告语“What can brown do for you？”的知名广告机构，该公司的CeO马特·威廉姆斯（Matt Williams）为企业营造了一种专注于协作、灵活和勇气的创新文化。

关键词：领导者联合包裹公司学会头脑风暴 What 保险公司政府雇员威廉姆斯

A pharmacologist's journey in medical education:a personal history

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Acta Pharmacologica Sinica 2004年第9期25卷 102-106页

作者： e e DANIeL AB T6G 2H7 Canada Department of Pharmacology Room 9-10 edmonton MSB University of Alberta

My journey as an educator in Pharmacology began in 1949, when, after finishing my MA in Biology at Johns Hopkins, Ⅰ decided that Ⅰ wanted to be involved in science with more relevance to humans. Ⅰhad been chasing f... 详细信息

关键词： ACe A pharmacologist’s journey in medical education

Validation of CFD-DeM model for iron ore reduction at particle level and parametric study

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Particuology 2020年第4期18卷 163-172页

作者： Dianyu e International Research Institute for Minerals Metallurgy and MaterialsJiangxi University of Science and TechnologyNanchang 330013China Department of Chemical engineering Monash UniversityClaytonVIC 3800Australia

Iron ore reduction is a primary unit operation in current metallurgy processes and dominates the energy consumption and greenhouse gas(GHG)emissions of the iron-making process,Therefore,even a slight improvement of the energy efficiency or GHG emissions of iron ore reduction would yield considerable benefits to the cost of pig iron and,more importantly,to mitigation of the associated carbon *** current study presents a discrete model that describes the iron ore reduction process for a single *** transient reaction progress can be predicted and is validated against experimental measurements under various operating conditions,including different reducing gases and *** effects of pressure,isothermality,gas composition,and flow rate on reduction are *** reduction rate increases significantly with increasing pressure until 5 atm,and the entire reduction process occurs more slowly under non-isothermal conditions than under isothermal *** work provides a solid foundation for the development of a comprehensive particulate system model that considers both heat and mass transfer.

关键词： Iron ore reduction Chemical reaction Blast furnace Discrete element method Computational fluid dynamics

Thermal conductivity of systems with a gap in the phonon spectrum

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Chinese Physics B 2018年第7期27卷 424-430页

作者： e Salamatov Udmurt Federal Research Center Ural Branch of the Russian Academy of Sciences

An original theoretical model for describing the low-temperature thermal conductivity in systems with a region of forbidden values （a gap） in the phonon spectrum is proposed. The model is based on new experimental results on the temperature dependence of the phonon diffusion coefficient in nanoceramics and dielectric glasses which showed a similar anomalous behavior of the diffusion coefficient in these systems that may be described under the assumption of a gap in the phonon spectrum. In this paper, the role of the gap in low-temperature behavior of the thermal conductivity, ~＇（T）, is analyzed. The plateau in the temperature dependence of the thermal conductivity is shown to correlate with the position and the width of the gap. The temperature dependence of thermal conductivity of such systems when changing the scat- tering parameters related to various mechanisms is studied. It is found that the umklapp process （U-processes） involving low-frequency short-wavelength phonons below the gap forms the behavior of the temperature dependence of thermal con- ductivity in the plateau region. A comparison of the calculated and experimental results shows considerable possibilities of the model in describing the low-temperature thermal conductivity in glass-like systems.

关键词： phononic band gap phonon diffusion coefficient thermal conductivity glassy crystals

Magnetophotothermal interaction in a rotating solid cylinder of semiconductor silicone material with time dependent heat flow

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Applied Mathematics and Mechanics(english edition) 2021年第1期42卷 39-52页

作者： A.e.ABOUeLReGAL Department of Mathematics College of Science and ArtsJouf UniversityAl-Qurayyat 77423Saudi Arabia Department of Mathematics Faculty of ScienceMansoura UniversityMansoura 35516Egypt

A mathematical model linking thermoelasticity to photothermal experiments is proposed with the consideration of the photothermal *** system equations for coupled plasma,heat conduction with phase-lags(PLs),and motion equations are introduced and solved by using the Laplace transform *** photothermal,thermal,and elastic waves in a rotating solid cylinder of semiconductor material are analyzed with the proposed *** cylinder surface is constrained and subjected to a time-dependent pulse heat *** sensitivity of the physical fields for the angular velocity,PLs,and thermal vibration parameters is *** addition,the effects of the effective parameters on the physical quantities are graphically illustrated and discussed in detail.

关键词： photothermal phase-lag(PL) solid cylinder rotation semiconductor carrier concentration

Size-dependent thermoelastic initially stressed micro-beam due to a varying temperature in the light of the modified couple stress theory

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Applied Mathematics and Mechanics(english edition) 2020年第12期41卷 1805-1820页

The bending of the euler-Bernoulli micro-beam has been extensively modeled based on the modified couple stress(MCS)*** many models have been incorporated into the literature,there is still room for introducing an improved model in this *** this work,we investigate the thermoelastic vibration of a micro-beam exposed to a varying temperature due to the application of the initial stress employing the MCS theory and generalized *** MCS theory is used to investigate the material length scale *** the Laplace transform,the temperature,deflection,displacement,flexure moment,and stress field variables of the micro-beam are *** effects of the temperature pulse and couple stress on the field distributions of the micro-beam are obtained numerically and graphically *** numerical results indicate that the temperature pulse and couple stress have a significant effect on all field variables.

关键词： thermoelectricity micro-beam initial stress temperature pulse modified couple stress(MCS)theory

The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris K.Salgado Jose M.Santiago Samuel e.Ocasio Rivera Dina P.Bracho-Rincon Luis H.Pagan Rivera Jorge D.Miranda Department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA National Institutes of Health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto Rico Carolina CampusCarolinaPRUSA Institute of Neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain eAAT-1/GLAST eAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

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220 GHz低噪声放大器研究

红外 2019年第8期40卷 24-30页

作者：毛燕飞鄂世举 schmalz Klaus SCHeYTT John Christoph 浙江师范大学工学院浙江金华321000 东南大学毫米波国家重点实验室江苏南京211189 德国莱布尼兹高性能创新微电子研究所法兰克福15236 帕德博恩大学海恩茨-尼克斯多夫研究所帕德博恩33102

基于IHP锗硅BiCMOS工艺,研究和实现了两种220 GHz低噪声放大器电路,并将其应用于220 GHz太赫兹无线高速通信收发机电路。一种是220 GHz四级单端共基极低噪声放大电路,每级电路采用了共基极(Common Base,CB)电路结构,利用传输线和金属-... 详细信息

基于IHP锗硅BiCMOS工艺,研究和实现了两种220 GHz低噪声放大器电路,并将其应用于220 GHz太赫兹无线高速通信收发机电路。一种是220 GHz四级单端共基极低噪声放大电路,每级电路采用了共基极(Common Base,CB)电路结构,利用传输线和金属-绝缘体-金属(Metal-Insulator-Metal,MIM)电容等无源电路元器件构成输入、输出和级间匹配网络。该低噪放电源的电压为1.8 V,功耗为25 mW,在220 GHz频点处实现了16 dB的增益,3 dB带宽达到了27 GHz。另一种是220 GHz四级共射共基差分低噪声放大电路,每级都采用共射共基的电路结构,放大器利用微带传输线和MIM电容构成每级的负载、Marchand-Balun、输入、输出和级间匹配网络等。该低噪放电源的电压为3 V,功耗为234 mW,在224 GHz频点实现了22 dB的增益,3 dB带宽超过6 GHz。这两个低噪声放大器可应用于220 GHz太赫兹无线高速通信收发机电路。

关键词：低噪声放大器 220 GHz 共基级共射共基太赫兹无线高速通信收发机 BiCMOS工艺

Collapse assessment of steel moment frames using endurance time method

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earthquake engineering and engineering Vibration 2015年第2期14卷 347-360页

作者： e.Rahimi H.e.estekanchi Department of Civil engineering Sharif University of Technology (SUT)

In endurance time(eT) method structures are subjected to a set of predesigned intensifying excitations. These excitations are produced in a way that their response spectrum, while complying with a specifi ed spectrum, intensifi es with time so they can be used approximately to simulate the average effects of several ground motions scaled to different intensities. In this paper applicability of the eT method for evaluating collapse potential of buildings is investigated. A set of four steel moment frames is used for collapse assessment. The process of using eT method in collapse evaluation is explained and the results are compared with incremental dynamic analysis(IDA) results. It is shown that although the computational effort using the eT method is much less than the IDA analysis, the results of both methods are consistent. Finally collapse fragility curves using eT and IDA methods are produced and it is shown that the probabilities of collapse in different hazard levels are also consistent.

关键词： endurance time method collapse analysis incrementa