6×6英寸的液晶显示屏

36平方英寸(有14,000象元)的平板显示屏是由薄膜晶体管和向列型液晶组成的。文中讨论了这种屏的设计、制作及性能。在另文中描述了在此屏上显示低分辨率闭路电视图象的周边电路设计。     

Vibrational-electronic coupling in IrF6, OsCl6 2− and IrCl6 2−

The results obtained in a previous paper [1] for an unsymmetric regular model are applied to solid hydrogen at low temperatures when the lattice structure and the quadrupole-quadrupole interaction make the interaction energies non-isotropic. It is shown that, as for the lattice structures with isotropic interactions, no second-order transition is likely to occur through a cooperative rotational effect. The possible occurrence of spatial ordering on sub-lattices is discussed. It is found that such ordering is unlikely to occur at low temperatures on the face-centred cubic lattice, but that on the hexagonal close-packed lattice (which is the probable crystal structure) there is a second-order transition to an ordered state. Using a zeroth-order approximation the temperature at which this transition occurs in pure ortho-hydrogen is found to be 5·8°k.     

Magnetic Properties and Magnetoresistance of HfFe6Ge6—Type Er1—xGdxMn6Ge6 and Ho1—xGdxMn6Ge6（0.2≤x≤0.9） Compounds

Magnetic properties and magnetoresistance effects of the Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 (0.2≤x≤0.9) compounds have been studied by magnetic property and resistivity measurements in applied magnetic field up to 5T. For increasing Gd content, two series display a transition from the antiferromagnetic state to the ferrimagnetic state. The Er1-xGdxMn6Ge6 (x=0.2 and 0.5) and Ho1-xGdxMn6Ge6(x=0.2 and 0.4) compounds order antiferromagnetically at 430,432,423 and 425K, respectively. The Er1-xMn6Ge6 (x=0.8 and 0.9) and Ho1-xGdxMn6Ge6(x=0.7,0.8 and 0.9) compounds order ferrimagnetically at 462, 471, 450, 463 and 470K, respectively. The Er1-xGdxMn6Ge6 and Ho1-xGdxMn6Ge6 compounds undergo the second transitions below 71 and 82K, respectively. The magnetoresistance curves of the Er0.1Gd0.9Mn6Ge6 and Ho0.1Gd0.9Mn6Ge6 compounds in a field of 5T are presented and the magnetoresistance effects are related to the metamagnetic transistions.     

超导体YB6和LaB6的电子结构研究

本文使用准确的第一原理方法，对超导体YB6和LaB6进行了电子结构比较研究，为进一步的实验研究提供理论参考．     

超导体YB6和LaB6的电子结构研究

本文使用准确的第一原理方法,对超导体YB6和LaB6进行了电子结构比较研究,为进一步的实验研究提供理论参考.     

超导体YB6和LaB6的电子结构研究

本文使用准确的第一原理方法,对超导体YB6和LaB6进行了电子结构比较研究,为进一步的实验研究提供理论参考.     

sd玻色子6维无迹算符和SO_6波函数

本文引进了sd玻色子的6维无迹算符。按照类似于文献[1,2]中的方法,首先用这些算符构成SU_6?SO_6?SO_5?SO_3波函数,然后求出用通常的s~ d~ 算符表达的明显公式。     

C6H6分子振动能谱的涨落统计特征

分析了C6 H6 分子振动能谱的涨落统计特征 .研究结果显示 ,C6 H6 分子振动能谱的涨落统计特征属于低Poisson型 ,即谱刚度值大于Poisson型与Wigner型 ,而能谱分维函数值则小于Poisson型与Wigner型 ,这是一种与通常的Poisson型、Wigner型完全不同的类型 ,该特性在一定程度上反映了C6 H6 分子结构的特殊性 .     

1977年第6卷第1—6期总目录

题 目 作 者 期数 页数“四人帮”破坏基础理论研究用心何在……………周培源1 1深切怀念敬爱的周总理……………………………………林兰英 13“四人帮”插手科技界的险恶用心………………………………戴念祖14“理论无用”论可以休矣………………………柳树滋 傅愫和 李惠国 2 65鼓吹“哲学代替科学”是对马克思主义的背叛…………………………童天湘、林夏水3129不要如浮云一样——为自然科学的基础理论恢复名誉……………………王 龙 4 193能量守恒和转化定律能够被“彻底打破”吗?——评李柯《论运动的守恒和不守恒》……师 量 5 257“…     

A modification potential method of calculating total cross sections of electrons scattering from complex molecules C2H6, C2F6, C6H6 and C6F6 at 100 eV-5000 eV

A complex optical model potential modified by incorporating the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds between two atoms in a molecule, is first employed to calculate the total cross sections for electrons scattering from such complex molecules as C总交叉断面 电子散射 添加规则 原子分子碰撞 电子云total cross section, electrons scattering, additivity rule, atomic and molecular collisionProject supported by the National Natural Science Foundation of China (Grant No 10574039).2005-11-102005-11-102005-11-30A complex optical model potential modified by incorporating the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds between two atoms in a molecule, is first employed to calculate the total cross sections for electrons scattering from such complex molecules as C2H6, C2F6, C6H6 and C6F6 using the aclditivity rule model at Hartree-Fock level over the energy range from 100 eV to 5000 eV. The total cross sections are quantitatively compared with those obtained by experiments wherever available, and they are in good agreement with each other over a wide energy range. It is shown that the modified potential together with the additivity rule model is completely suitable for the calculation of total cross sections of electrons scattering from such complex molecules as C2H6, C2F6, C6H6 and C6F6 above 200 eV-300 eV.     

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建立了6Li D转换器中14Me V中子源强的计算模型,对转换器不带辐照样品和分别带2、3、4个辐照样品时的中子源强进行了计算,对转换器产生的中子和来自于堆芯的中子在样品内的能谱和中子注量率进行了计算。结果表明,辐照管内充水和氦气时,辐照样品内由转换器产生的能量大于13Me V的中子分别占能量在1Me V以上中子的25.7%、24.6%,辐照样品内由堆芯产生的能量大于13Me V的中子仅占能量在1Me V以上中子的10·5左右,样品内14Me V中子源强分别可达4.31×1013nT·s·1、3.34×1013 nT·s·1;中子注量率分别可达2.66×1010nT·cm·2·s·1、3.53×1010nT·cm·2·s·1。     

外电场作用下C6H6的分子结构及其特性

采用 B3P86方法计算了C6H6在外电场作用下分子系统的能量及分子轨道能级、谐振频率、CH键离解能和极化率等分子特性;通过跃迁矩阵元计算了各激发态的激发能,吸收及自发辐射系数,从而进一步分析了苯分子的外场效应.对于高分子化合物尤其是具有苯环结构的有机高分子化合物的外场作用特性的研究具有参考价值.     

Ga6 N6团簇结构性质的理论计算研究

在密度泛函理论的基础上,对Ga6N6团簇进行了第一性原理、全电子、从头计算,得到了10种可能的三维空间结构及其电子结构.其中最稳定结构的一对GaN原子的平均结合能为9.748 eV,因此是可能存在的.但与他人计算的Ga3N3和Ga5N5相比,Ga6N6团簇可能不属于"幻数"团簇.最稳定结构的Ga6N6团簇的费米面是部分占有的,能量为EF=-5.2972 eV,因此具有"金属性",但没有自旋磁矩.我们还计算了该结构的Ga6N6团簇的亲和势、电离能和电子跃迁能.这将有助于对GanNn团簇系列的结构和性质随n变化的研究.     

Phase transition studies in CoSiF6·6H2O and Co1−xZnxSiF6·6H2O by Mn(II) EPR

Phase transition studies on single crystals of CoSiF₆·6H₂O and Co_1−xZn_xSiF₆·6H₂O (x = 0.082, 0.182, 0.248) using Mn(II) EPR at X-band were carried out in the temperature range 10–300 K. Phase transitions with considerable thermal hysteresis have been detected in CoSiF₆·6H₂O and Co_1−xZn_xSiF₆·OH₂O (x = 0.082, 0.182). In CoSiF₆·6H₂O, the transition temperatures during cooling (T^c_c) and during heating (T^h_c) were found to be considerably less than those obtained previously from magnetic anisotropy experiments, i.e. 230 and 246 K as against 246 and 259 K. These characteristic temperatures for the dilute crystals having x = 0.082 and 0.182 were 205, 218 K and 175, 185 K, respectively. It is thus evident that magnetic dilution with zinc causes a progressive reduction in the transition temperatures as well as in the thermal hysteresis. The phase transition manifests itself in a large discontinuous increase in the Mn(II) zero-field splitting parameter (D), i.e. from −187 ± 1 G to −290 ± 1 G, in these crystals. The hyperfine coefficient (A) also increases discontinuously from 99 ± 1 G to 102 ± 1 G at T_c. In the dilute crystal with x = 0.248 a very slow continuous decrease in D and practically no change in A have been detected with a lowering of the temperature. A small temperature independent positive g-shift (g = 2.020 ± 0.005) has been observed in all the crystals studied. The spin-lattice relaxation time (T₁) of the Co(II) ion in CoSiF₆·6H₂O at different temperatures, both above and below T_c, has been estimated from the observed Mn(II) hyperfine linewidth. A discontinuous change in T₁ at T_c has been observed. Analysis of the temperature dependence of the linewidth has further revealed that a two-level Orbach process describes well the thermal behaviour of the spin-lattice relaxation of the Co(II) ions in these crystals. The location of the first excited level in CoSiF₆·6H₂O determined from such studies at temperatures both above and below T_c has been examined in the light of the ligand field energy scheme of the Co(II) ion in an octahedral field. It is concluded that the phase transition in this crystal is probably accompanied by a change in sign of the axial field parameter (Δ).