德国Magnat密力小金刚——Vector维他11号书架箱小赏

春节我与妻子同行,来到洒满阳光的珠海经济特区。这里与内地的确有许多不同,首先是温差较大,终于可以只穿件衬衫过年了。此外这里的人很爱花,过节逛花市买把鲜花放在家中是必不可少的。当然这里与内地也有许多相同之处,过年的喜庆劲儿都是一样的,对音乐也都有着执着的热爱。 上街逛电器店是我最乐于做的事情,珠海有不少大大小小的电器店,在一家电器商场里很偶然地被一对很可爱的小书架箱所吸引,它实在太小了。

鄂尔多斯盆地东缘上古生界致密储层含气系统压力演化

鄂尔多斯盆地东缘上古生界多层系致密气发育,准确认识气藏压力演化过程对深化致密气成藏认识和实现气井高产稳产具有指导意义。综合应用钻测井资料和岩心流体包裹体测试,结合盆地埋藏史和热演化史模拟,揭示了鄂尔多斯盆地东缘上古生界含气系统压力演化。结果显示,研究区自下而上发育欠压、略微欠压和常压系统。均一温度和盐度总体上连续分布,反映了油气连续充注过程。太原组、山西组和下石盒子组均一温度和盐度正相关,反映近源生烃后快速充注;上石盒子组和石千峰组均一温度和盐度负相关,受流体远距离运移充注和紫金山构造热事件作用下的气藏再平衡影响。研究区在白垩纪中期大量生烃,形成了异常高压,储层压力在34.89~38.26 MPa。后期地层抬升造成储层压力降低,其中地层降温贡献了50.31%~57.85%;天然气膨胀引起的气体运移贡献了28.25%~41.95%,且以上部地层降低为主;孔隙反弹贡献了0.37%~0.79%。相关成果系统揭示了上古生界致密气藏压力系统演化及现今气藏压力成因,对于认识鄂尔多斯盆地和类似盆地致密气富集成藏规律具有借鉴意义。

试论白族密宗阿吒力教在保山香童戏中的遗迹

保山香童戏,从功用、庙坛组织的形式和神祇的崇奉内容看,都与白族佛教密宗阿吒力有相似、相通的关系,且史实证明,唐至元代,保山占支配地位的主体民族是白族,占支配地位的宗教是白族佛教密宗阿吒力教,因此,我们有证据说,白族佛教密宗阿吒力教对保山香童戏有着较为深刻的影响。

道岔密贴与密贴力的调整

本文结合实际总结出一套分析和处理电动道岔故障的方法和步骤。为快速、准确地判断、处理故障和压缩故障延时提供了保障。

浅探ZD-6道岔密贴力的调整

电动转辙设备在转换过程中密贴力的调整，是电动转辙道岔的关键工序。就如何适当地调整电动道岔密贴力和解决与其相关的病害进行了探讨。

道岔密贴力测试方法初探

论述了现行道岔四毫米（密贴力）检查方法的不足，并提出了改进方案。

挤密桩在红黏土地基中挤密效果影响因素试验研究

基于室内桩孔水泥土夯击试验,研究夯锤形状、夯锤落距和夯击次数对挤密力和压实系数的影响规律,建立拟合数学模型。研究结果表明:平底锤对桩底的挤密力最大,锥底锤对桩侧的挤密力最大。挤密力和桩体压实系数与夯击次数、夯锤落距之间存在对数函数相关性,用对数数学模型计算挤密力平均误差不超过7 k Pa,压实系数平均误差不超过2%;根据桩体压实系数的数学模型和挤密力随夯击次数的规律,以夯击能作为考量标准,提出最优夯击方案为锤底为锥形、30 cm落距和每层夯击30次。

Properties of Self-recoverable Mechanoluminescence Phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) and Its Information Encryption Application

A novel self-recoverable mechanoluminescent phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+) was developed by the high-tem-perature solid-state reaction method,and its luminescence properties were investigated.Ca_(5)Ga_(6)O_(14)∶Eu^(3+)can produce red mechanoluminescence,and importantly,it shows good repeatability.The mechanoluminescence of Ca_(5)Ga_(6)O_(14)∶Eu^(3+) results from the piezoelectric field generated inside the material under stress,rather than the charge carriers stored in the traps,which can be confirmed by the multiple cycles of mechanoluminescence tests and heat treatment tests.The mechanoluminescence color can be turned from red to green by co-doping varied concentrations of Tb^(3+),which may be meaningful for encrypted letter writing.The encryption scheme for secure communication was devised by harnessing mechanoluminescence patterns in diverse shapes and ASCII codes,which shows good encryption performance.The results suggest that the mechanoluminescence phosphor Ca_(5)Ga_(6)O_(14)∶Eu^(3+),Tb^(3+)may be applied to the optical information encryption.

楚雄出土阿吒力元碑述略

1998年初，在楚雄市吕合镇白石盘沙沟路中发现一块元代阿吒力“周大师庆”的墓碑，碑文记载周氏啊吒力依附南诏国贵族统治阶级，有的任职国师，位尊职显，有的还随兵征战助阵，尊为随兵坛主。从碑文内容来看，阿吒力教徒居家，可以取妻生子，可以世代承袭。此碑不同于其它南诏大理国时期碑刻从左至右直书的书写方式，而是从右至左直书，已接受了汉字的传统书写方式。

ZD6型转辙机接点反弹成因分析及解决对策

针对ZD6型转辙机在道岔闭合表示电路的过程中,动接点会瞬间发生反向动作,从静接点弹出或者接触不良,导致电路出现断路的问题,分析相关影响因素,以及反弹趋势电流与密贴力、锁闭电流之间的关系,提出了直流电机加装惰性轮的方法,通过消除惯性力彻底解决了接点反弹问题。

Effect of additives on properties of aluminium titanate ceramics

The influence of some additives on bulk density,phase composition,mechanical strength and thermal shock resistance of aluminium titanate （AT） ceramics was investigated.AT ceramics with different additives of MgO,SiO2 and Fe2O3 were prepared by reaction sintering.Properties of AT ceramics were tested by using Archimedes,three-point bending and thermal cycling tests.It was found that additives of MgO,SiO2 and Fe2O3 or their compound additives are favorable to reduce the porosities of AT,enhance mechanical strength and thermal shock resistance.The role of additives can be rationalized in terms of promotion of sintering process,formation of new phases and influence on lattice constant c of AT ceramics.

Effects of current density on microstructure and properties of plasma electrolytic oxidation ceramic coatings formed on 6063 aluminum alloy

Plasma electrolytic oxidation (PEO) ceramic coatings were fabricated in a silicate-based electrolyte with the addition of potassium fluorozirconate (K2ZrF6) on 6063 aluminum alloy, and the effects of current density on microstructure and properties of the PEO coatings were studied. It was found that pore density of the coatings decreased with increasing the current density. The tribological and hardness tests suggested that the ceramic coating produced under the current density of 15 A/dm2showed the best mechanical property, which matched well with the phase analysis. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves proved that the coating obtained under 15 A/dm2 displayed the best anti-corrosion property, which was directly connected with morphologies of coatings.

Evolution of stresses in metal injection molding parts during sintering

The evolution of stresses due to inhomogeneity in metal injection molding （MIM） parts during sintering was investigated. The sintering model of porous materials during densification process was developed based on the continuum mechanics and thermal elasto-viseoplastic constitutive law. Model parameters were identified from the dilatometer sintering experiment. The real density distribution of green body was measured by X-ray computed tomography （CT）, which was regarded as the initial condition of sintering model. Numerical calculation of the above sintering model was carried out with the finite element soRware Abaqus, through the user-defined material mechanical behavior （UMAT）. The calculation results showed that shrinkages of low density regions were faster than those of high density regions during sintering, which led to internal stresses. Compressive stresses existed in high density regions and tensile stresses existed in low density regions. The densification of local regions depended on not only the initial density, but also the evolution of stresses during the sintering stage.

Fatigue reliability quantitative analysis of cement concrete for highway pavement under high stress ratio

In order to obtain the change law of the fatigue reliability of cement concrete for highway pavement under high stress ratios, first, the probability densities of monotonic random variables including concrete fatigue life are deduced. And then, the fatigue damage probability densities of the Miner and Chaboche-Zhao models are deduced. By virtue of laboratory fatigue test results, the fatigue damage probability density functions of the two models can be obtained, considering different stress ratios. Finally, substituting load cycles into them, the change law of cement concrete fatigue reliability about load cycles can be acquired. The results show that under the same stress ratio, with the increase in the load cycle, the fatigue reliability declines from almost 100% to 0% gradually. No matter under what stress ratio, during the initial stage of the load action, there is always a relatively stable phase for fatigue reliability. With the increase in the stress ratio, the stable phase gradually shortens and the load cycle corresponding to the reliability of 0% also decreases. In the descent phase of reliability, the higher the stress ratio is, the lower the concrete reliability is for the same load cycle. Besides, compared with the Chaboche-Zhao fatigue damage model, the Miner fatigue damage model is safer.

Internal stress analysis of electroplated films based on electron theory

Cu films on Fe, Ni and Ag substrates, Ni films on Fe and Ag substrates, Ag film on Cu substrate, Cr film on Fe substrate, Ag film on Ag substrate, Ni film on Ni substrate and Cu film on Cu substrate were deposited by electroplating. The average internal stress in all films, except Cr, was in-situ measured by the cantilever beam test. The interfacial stress is very large in the films with different materials with substrates and is zero in the films with the same material with substrates. The interfacial stress character obtained from the cantilever beam bending direction is consistent with that obtained from the modified Thomas–Fermi–Dirac electron theory.

Gravity inversion using the frequency characteristics of the density distribution

Three-dimensional gravity inversion based on the mass property model is very popular in recent years. The time and efficiency of inversion algorithms is relative to the magnitude of the target mesh. One approach is to search over the entire solution space for a more refined result. However, the inversion will be difficult with the increased parameters in the large search space and the number of computations increases exponentially. ｜n this paper, we propose a novel approach based on the frequency characteristics of the density distribution over the mesh. The purposes of our study are to reduce the parameters of three- dimensional gravity inversion and to lighten the image quality of the inversion result. The results show that the new method can expedite the inversion processing and get a better geological interpretation than tradition methods.

Potential Function and Thermodynamic Property of UO

Potential energy scan for uranium oxide （UO） was performed by ab initio configuration inter- action （CI） method and density functional theory methods at the PBE1 and the B3LYP levels in combination with the （ECPSOMWB_AVQZ＋2f） basis set for uranium and 6-311＋G＊ for oxygen. The dissociation energies of UO, after being corrected for the zero-point vibrational energy, are 2.38, 3.76, and 3.31 eV at the CI, PBE1, and BaLYP levels, respectively. The calculated energy was fitted to potential functions of Morse, Lennard-Jones, and Rydberg. Only the Morse function is eligible for the potential. The anharmonieity constant is 0.00425. The anharmonic frequency is 540.95 em-1 deduced from the PBE1 results. Thermodynamic properties of entropy and heat capacity at 298.2-1500 K were calculated using DFT-UPBE1 results and Morse parameters. The relationship between entropy and temperature was established.