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Optical properties of GaN:Tb nanoparticles synthesized by simple ammonification method
氨化法制备GaN:Tb纳米颗粒的光学性能

Pan Xiao-Jun,An Xiu-Yun,Zhang Hai-Jun,Zhang Zhen-Xing,Xie Er-Qing,<br>,安秀云,张海军,张振兴,谢二庆
物理学报 , 2013,
Abstract: 利用简单的氨还原方法制备了GaN:Tb纳米颗粒. X射线衍射结果显示纳米颗粒为六方结构, 根据Scherrer公式, 计算得到了GaN:Tb纳米颗粒的平均晶粒大小为21.2 nm; 透射电子显微镜结果显示为GaN:Tb纳米颗粒尺寸均匀, 尺寸大小约为20 nm; 除正常的GaN Raman振动模式外, 还观察到了251和414 cm-1 2个额外的Raman散射峰, 前者是表面无序或尺寸限制效应造成的, 而后者则是八面体Ga-N6振动模式; 最后, 测量了GaN:Tb纳米颗粒的室温光致发光谱, 获得了Tb3+离子在可见光区(位于493.9, 551.2, 594.4和630.1 nm)的本征发光.
Optical properties of ZnO and MgxZn1- x O nanoparticles prepared by flame spray synthesis
火焰喷雾法合成ZnO和MgxZn1-xO纳米颗粒的光学性能研究

Li Hui,Xie Er-Qing,Zhang Hong-Liang,Pan Xiao-Jun,Zhang Yong-Zhe,<br>李 晖,谢二庆,张洪亮,,张永哲
物理学报 , 2007,
Abstract: 利用火焰喷雾法成功制备了纳米级的ZnO和MgxZn1-xO颗粒. 通过对样品的X射线衍射谱和场发射扫描电子显微镜照片分析,发现制备的颗粒大小较为均匀,直径在20nm左右;镁元素的掺入引起晶格常数变小. 通过透射光谱和光致发光谱的测量,发现MgxZn1-xO颗粒的禁带宽度远大于ZnO颗粒的禁带宽度,同时对两组样品的紫外发光和可见发光的强度变化和发光机理进行了探讨.
Optical Properties of a-GaN Film Deposited by DC Magnetron Sputtering
溅射制备非晶氮化镓薄膜的光学性能

PAN Xiao-Jun,ZHANG Zhen-Xing,JIA Lu,LI Hui,XIE Er-Qing,<br>,张振兴,贾璐,李晖,谢二庆
无机材料学报 , 2007,
Abstract: GaN thin films were prepared by direct current (DC) planar magnetron sputtering on Si and SiO$_2$. The films were characterized by X-ray diffraction (XRD), Raman, Fourier Transform Infrared Spectroscopy (FTIR), photoluminescence (PL) and UV-Vis spectra. XRD and Raman spectrum show that the films are amorphous. Fourier infrared absorbance spectrum shows that the main absorbance is Ga-N stretching vibration. 360nm ultraviolet emission is obtained at room temperature. UV-Vis result shows that the optical band gap of the films is 3.74eV, which is consistent with photoluminescence spectrum result. \vspace*{.2cm
ROTATIONAL MAGNETIZATION IN POLYCRYSTALLINE FERROMAGNETICS
铁磁性多晶体的旋转磁化

S T PAN,<br>
物理学报 , 1951,
Abstract: In the attempts to derive from theory the magnetization curve, in the region of rotational magnetization, for well annealed ferromagnetic polycrystals, a generally recognized complication is the possible existence of internal fields caused by the out of alignment of the magnetization vectors of the grains. However, if such internal fields do not really exist, a simple deduction by the usual formal treatment predicts that the magnetization curves of polycrystals, of the same crystalline structure and having the same sign for the values of the principal anisotropy constant, can be brought into coincidence by expressing the intensity of magnetization and the field in proper reduced units'. This prediction is checked experimentally by measurements on iron and an iron alloy containing 15 percent cobalt by weight. In each case, it is found that the normal magnetization curves for various temperatures can be brought into coincidence in the manner as indicated. It is therefore concluded that the effect of internal fields on the process of magnetization in the case of polycrystals cannot be any greater than that in the case of single crystals. The absence of wide spread internal fields of magnetic origin in polycrystals during rotational magnetization is then discussed in the light of recent developments in the domain theory.
MAGNETIZATION NEAR SATURATION OF IRON AND IRON-COBALTS AT VARIOUS TEMPERATURES
鐵及鐵钴合金在各种温度下接近饱和时的磁化

PAN SHIAO-THUR,<br>
物理学报 , 1953,
Abstract: The approach to magentic saturation in the cases of iron, nickel, and a number of iron-cobalt alloys at various temperatures has been studied in the range of field from a few hundred to 6,000 oersteds. It has been found that for annealed and moderately cold-worked specimens the differential susceptibility can be represented fairly accurately by a formula of the form ((?I)/(?H))T=A/H2+(2B)/H2+ C/H1/2+D where I is the magnetization, H the applied field, and T the temperature. Near room temperature, the last two terms taken together are so small compared to the first two that they can be approximated by a single constant. For a specimen starting in the annealed state both the coefficients A and B increase at first tremendously with the amount of cold-work the specimen receives, but the formula fails to apply when the specimen is severely cold-worked For annealed specimens these coefficients decrease with increasing temperature, vanishing at considerable distances below the Curie point. In general, D cannot be evaluated with certainty from the present data. However, the coefficient C evaluated by neglecting D is in satisfactory agreement with the theoretical results of Holstein and Prima-koff in so far as its order of magnitude and the way in which it varies withthe temperature are concerned. B is undoubtedly proportional to K12/I5 where K1 is the first magnetocrystalline anisotropy coefficient and I5 thesaturation magnetization. However, values of K1 obtained by comparing theory and experiment are satisfactory only in regard to the order of magnitude.
CATASTROPHE THEORY ANALYSIS ON ROCKBURST IN NARROW COAL PILLAR
狭窄煤柱岩爆的突变理论分析

Pan Yue,Zhang Xiaowu,<br>,
岩石力学与工程学报 , 2004,
Abstract: Based on the simplified analytic model of rockburst in narrow coal pillar,the catastrophe model of rockburst in narrow coal pillar,the fold catastrophe model can be educed by equilibrium relation of work-energy increment from energy conservation principle. All the characteristics,demonstrated by the equilibrium equation and its equilibrium path of catastrophe model,can be used to describe the main behaviors of failure process in coal pillar with the forms of rockburst and gradual damage one by one correspondingly. The variation rate curve of elastic energy of rock beam,which includes abundant information,is given for the first time,which is of great significance for understanding the behavior and law of rock beam-coal pillar system in each phase. The presented study results show that energy importing rate J = 0 is the critical condition of system destabilization,which implicates Cook stiffness criterion and is a dynamic generalization of Cook criterion in the form of energy.
LIE DETECTION OF BACKSTER SYSTEM AS A NEW TECHNIQUE APPLIED IN THE COURT IN CHINA
美国贝克斯特测谎系统在我国法庭科学中的应用

Pan Jun,<br>,李焰
心理学报 , 2001,
Abstract: Lie detection of Backster System from U.S.A has been applied in Chinese court as a new technique since 1993. It is successfully used in both civil and criminal cases which had never been done in other countries. Efforts were made to improve the system to meet with Chinese culture. The reliability, validity and distinguishability were verified at a high level by a large sample of more than 300 Chinese subjects in three years. Relevant issues are discussed in order to make greater progress in practice work, such as the estimating level in the judgment of lying or honesty, error elimination and so on.
A Study on Immature Oil''s Genesis in Eastern Linqing Depression of Bohai Bay Basin
渤海湾盆地临清坳陷东部未熟—低熟油成因探讨

LI Xiao-jun,<br>李
天然气地球科学 , 2009,
Abstract: 通过对渤海湾盆地临清坳陷东部未熟-低熟油的形成条件及形成机制探讨,总结出沙一段和沙三段的微成水-咸水介质环境、丰富硫细菌和含硫化合物为临清坳陷东部未熟-低熟油气形成提供了有利条件,证实该区未熟-低熟油气形成是低活化能的富氢腐泥组分受到硫细菌早期低温降解作用的结果,明确该区未熟-低熟烃源岩硫细菌降解的有机质早期生烃阶段的Tmax值为400~435℃,Ro值为0.2%~O.5%,生油高峰Tmax值为420℃,Ro值为O.35%左右.
POTENTIAL GAME OF MULTI-CLASS,MULTI-CRITERIA TRAFFIC ASSIGNMENT AND CONGESTION PRICING
多用户类多准则交通分配的势博弈与拥挤定价

YU Xiaojun,HUANG Haijun,<br>余,黄海军
系统科学与数学 , 2010,
Abstract: Managers of a transportation network don't know the utilities of road users when resolving the urban traffic and they have a limited ability to observe road users' path choice behavior. In this paper, the potential game theory is used to study the evolution of multi-criteria traffic assignment with multiple user classes. An admissible dynamic, i.e., a specific evolutionary dynamic which models the behavior as a myopic adjustment process of switching paths for current utility improvement, in the case of either fixed demand or elastic demand, is derived. It is shown that the corresponding traffic assignment is the Nash equilibrium of a potential game if both link travel time function and inverse demand function are strictly monotonic, continuous and differentiable. Furthermore, a variable congestion pricing is given, which can drive the multi-class multi-criteria traffic assignment at current system status to be optimal.
ELECTROMAGNETIC MISSILE SYSTEMS
电磁导弹系统

Zhan Jun,Li Xiaoxu,<br>詹,
电子与信息学报 , 1988,
Abstract: The theory of electromagnetic missiles established by T. T. Wu (1985) is developed. The asymptotis condition for the spectrum of the exciting signal of the electromagnetic missile system is derived and several kinds of possible electromagnetic missile systems are given.
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