可逆机效率的简单计算方法

本文把理想的可逆卡诺机热效率公式和致冷系数公式的形式推广应用到一类非卡诺机，为计算理想气体含有两绝热过程与多方过程组成的可塑机效率提供了一种简单计算方法。     

用有效折射率／有限元法设计1．55μmTi：LiNbO_3单模条波导及其方向耦合器

应用有效折射率／有限元法（ＥＩ－ＦＥＭ），考虑到ＬｉＮｂＯ３晶体和Ｔｉ扩散的各向异性，折射率增量与寻常光、非寻常光及波长色散的关系，设计了１．５５μｍ光波长下工作的ｚ切ｙ传播Ｔｉ：ＬｉＮｂＯ３单模条波导的制备参数，计算和分析了其单模特性、模式场分布及其变化规律．扩展了ＥＩ－ＦＥＭ，将其用于求解耦合波导系统，确定了方向耦合器的耦合长度及其波长色散特性．     

类锂离子O%5＋的电子碰撞电离

此文采用扭曲库仑波函数描述碰撞电子，用Ｒ─矩阵密耦波函数处理被电离电子与剩余离子构成的系统初末态，在库仑玻恩各级近似下计算了类锂离子Ｏ５＋的电子碰撞电离截面及相应速率系数，这是文献中首次使用密耦方法，在考虑通道相互作用情形下得到的结果。     

Wronskian and Grammian Determinant Solutions for a Variable-Coefficient Kadomtsev-Petviashvili Equation

In this paper, we derive the bilinear form for a variable-coefficient Kadomtsev Petviashvili-typed equation. Based on the bilinear form, we obtain the Wronskian determinant solution, which is proved to be indeed an exact solution of this equation through the Wronskian technique. In addition, we testify that this equation can be reduced to a Jacobi identity by considering its solution as a Grammian determinant by means of Pfaffian derivative formulae.     

Design and optimization of with low weakly-coupled few-mode fiber nonlinearity

By investigating the influence of the difference of refractive index between core and cladding （nco - ncl）, normalized frequency （V） and core radius （α） on both the intramodal and intermodal nonlinear coefficients （NCs） respectively, we design a novel weakly-coupled four-mode fiber with low nonlinearity. In general, under the premise of ensuring the low NCs between two non-degenerate modes, this design can reduce the intermodal NCs （〈 0.5 W-l·km^-1） between two degenerate modes and optimizes the parameters of differential group delays （DGDs） and chromatic dispersion. The optimized few mode fiber （FMF） is eligible for transmission and mode de-multiplexing in the receiver.     

Wronskian Form Solutions for a Variable Coefficient Kadomtsev–Petviashvili Equation

Starting from a simple transformation, and with the aid of symbolic computation, we establish the relation- ship between the solution of a generalized variable coefficient Kadomtsev-Petviashvili （vKP） equation and the solution of a system of linear partial differential equations. According to this relation, we obtain Wronskian form solutions of the vKP equation, and further present N-soliton-like solutions for some degenerated forms of the vKP equation. Moreover, we also discuss the influences of arbitrary constants on the soliton and N-soliton solutions of the KPII equation.     

Investigation of strain effect on the hole mobility in GOI tri-gate pFETs including quantum confinement

The strain impact on hole mobility in the GOI tri-gate pFETs is investigated by simulating the strained Ge with quantum confinement from band structure to electro-static distribution as well as the effective mobility. Lattice mismatch strain induced by HfO2 warps and reshapes the valence subbands, and reduces the hole effective masses. The maximum value of hole density is observed near the top comers of the channel. The hole density is decreased by the lattice mismatch strain. The phonon scattering rate is degraded by strain, which results in higher hole mobility.     

蒸汽喷射制冷系统用单双级喷射器性能分析

对制冷量为10kW,发生温度90℃,冷凝温度35℃,蒸发温度9℃的喷射制冷系统用单、双级喷射器进行设计及性能分析。双级喷射器的喷射系数在较低蒸发温度时比单级喷射器低约20%,在较高蒸发温度时性能接近甚至超过单级喷射器。发生温度和冷凝温度发生改变时,单级喷射器喷射系数的变化较双级喷射器更急剧,双级喷射器可接受的工况范围更大,除离设计工况点较近情况,双级喷射器在大部分区域里喷射系数较单级喷射器高。考虑到制冷系统中蒸发温度的可控制性及发生温度、冷凝温度的不稳定性,压缩比值较大的蒸汽喷射制冷系统中,宜采用双级喷射器。     

热等静压对NbTi/Cu多芯超导线加工过程的影响

采用传统方法生产的NbTi/Cu多芯超导线在生产芯数较多的超导线时存在填充系数较大的问题,这直接影响了芯丝的整齐排布,所以组装完成后加入热等静压过程.研究了经过热等静压和未经过热等静压的NbTi/Cu多芯超导线的加工性能.经过试验证明,经过100～150MP,2小时热等静压处理的NbTi/Cu多芯超导线坯锭在加工过程中具有良好的加工性能,提高了超导线复合坯锭的成品率;而未经过热等静压处理的NbTi/Cu多芯超导线坯锭加工性能较差,坯锭内部缺陷较多.     

载气汽油在水平螺旋扁管管束中的沸腾换热

以汽油-空气为介质,在不凝性气体质量含量不超过5%时,对导程为200mm的螺旋扁管管束中的沸腾换热进行了实验研究,分析了沸腾换热系数随两相质量流量的变化规律以及流动压降随空气流量的变化规律。得到了相应条件下,载气汽油在该导程的螺旋扁管管束中的沸腾换热实验关联式。