军用激光器的光束质量特征分析和探讨

该文对不同应用目的的军用激光器的光束特征进行了必要的分析论证，阐释了不同类型军用激光器体现光束质量的重要参数，对有关质量特征参数的测试方法进行了探讨。最后，针对军用激光光束特征测试现状，提出了建议。     

A theoretical and experimental investigation of a family of minimum-weight simply-supported beams

Space and force diagrams are presented for a family of simply-supported minimum-weight beam structures. The analytical methods, used to determine volume and displacements for a structure with different strength in tension and compression, are reviewed using the simplest circular arc beam example. The full design of a non-trivial symmetrical beam is described. The use of power series solutions and a matrix operator numerical method, developed for plane-strain slip-line field theory, are described to determine the beam layouts. The results of testing beam models, manufactured using both laser free-form sintering of nylon powder and CNC milling of aluminum alloy plate, are compared to the theoretical predictions of stiffness and maximum load capability. The theoretical predictions are shown to provide excellent agreement with both the isotropic aluminum test structure, and with the strongly bi-modulus nylon test structures.     

碳纤维布(CFRP)加固混凝土粱正截面抗弯设计方法

介绍了碳纤维布（CFRP）加固混凝土梁构件的正截面受弯破坏模式，提出了计算方法。     

H-S波前传感器在测量光束质量因子M 2中的应用

仿真研究了H－S测量M^2因子等光束质量指标的全过程和可行性。结果表明，由H－S测量的圆形光束的M^2因子值与原始光束的M^2因子值基本相当，有很好的一致性。由此认为，H-2S除了可以评价远场测量系统探测得到的光斑的各种量，比如PSF，OTF，衍射极限，环围能量等远场特性，而且还可以从M^2因子来说明光束质量的特性。     

再论多缸柴油机曲轴平衡重的合理配置

以连续梁模型作为曲轴受力分析的基础上，分析了平衡重对曲轴所受弯矩的影响。常规的设计理论认为。在曲轴上装设平衡重可平衡由曲离心力引起的内力矩，文中通过这一实例的大量计算，得出与传统观念十分不同的结论。     

高大模板结构尺寸的换算及支撑架布置浅谈

通过各规范中荷载计算公式得出高大模板梁板尺寸的界定,使用PKPM软件计算各立杆间距所能承受的高大模板构件尺寸,并介绍支撑架体布设思路。     

厦门国际会展中心二期张弦梁结构应用与实践

厦门会展中心二期展厅跨度81米,施工工期异常紧张,采用张弦梁体系取得技术安全、质量可靠、工期短、造价经济、结构美观的良好效果,通过对会展中心张弦梁体系的选型、设计、施工难点分析,介绍了张弦梁结构的受力性能及应用实践,可供类似工程参考借鉴。     

落锤式弯沉仪(FWD)与贝克曼梁(BB)的相关性分析

以古神公路沥青混凝土路面为研究对象,分析了贝克曼梁与落锤式弯沉仪(FWD)在检测沥青混凝土路面弯沉时的相关性,并建立FWD与贝克曼梁检测数据的线性回归公式,对该地区道路状况评定具有借鉴意义。     

Control of the energy of ion flow affecting electrically insulated surface in plasma processing reactor based on a beam plasma discharge

We compare two ways to control the distribution function of ions on the isolated structure which is treated in a plasma reactor based on beam plasma discharge. In the first case, the periodic pulse voltage is applied to the substrate holder. The calculation of currents and voltages on the surface in contact with the plasma in a simple empirical model has been performed; the comparison of results of calculation and experiment is presented. In the latter case, the pulsed voltage is applied to the discharge collector, thus modulating the plasma potential. The comparison shows that the second method provides more efficient control of the distribution function of ions, acting on the treated substrate.     

The IFMIF-EVEDA challenges in beam dynamics and their treatment

One major system of the IFMIF project (International Fusion Materials Irradiation Facility) is its two accelerators producing the neutron flux by accelerating deuteron particles up to 40 MeV against a lithium target. In the first phase called EVEDA (Engineering Validation and Engineering Design Activity), a full scale prototype accelerating particles up to 9 MeV is being studied and constructed in Europe, to be installed in Japan.Two unprecedented performances are required for the IFMIF-EVEDA accelerators: very high power of 5 MW and very high intensity of 125 mA CW. This leads to numerous unprecedented challenges in beam dynamics design and optimisation: harmful losses even for those less than 10⁻⁶ of the beam, non-linear dynamics induced by very strong space charge forces, difficulties for equipment and diagnostic implementations in the high compact structure, need of specific tuning strategies in this context.These issues are highlighted in this article, and the ways in which they are addressed are detailed.