摘要：采用流变测试方法研究掺减水剂的胶结膏体随时间变化的流变参数,特别关注静态屈服应力和触变性。结果表明,随减水剂用量的增加,胶结膏体的静态屈服应力、动态屈服应力和触变性显著降低,塑性黏度几乎不变。养护时间对掺减水剂胶结膏体的静态屈服应力、动态屈服应力和触变性有显著影响,在2 h内分别提高了46.6%~87.1%、15.2%~35.6%和79.4%~138.2%。无减水剂胶结膏体的静态屈服应力、动态屈服应力和触变性在2 h内仅分别提高4.9%、6.3%和16.1%。无论是否添加减水剂,养护时间对胶结膏体的塑性黏度有较大影响,2 h内塑性黏度增大13.2%~19.7%。无论是否添加减水剂,胶结膏体的触变性随静态屈服应力、动态屈服应力呈线性函数增长。研究结果对掺减水剂胶结膏体的管道输送设计有一定的指导意义。

摘要：This paper describes a new method which has been developed for the solution of direct and inverse problems of 3-D compressible flows in *** types of streamfunctions are propsed in the paper and the atreamfunction-coordinate system is applied in numerical computations,The algorithm is applied to statorblades and the results are compared with experimental *** is thown that the comparisons are very satisfactory.

摘要：A new method for patterned sapphire substrate （PSS） design is developed and proven to be reliable and cost-effective. As progress is made with LEDs＇ luminous efficiency, the pattern units of PSS become more complicated, and the effect of complicated geometrical features is almost impossible to study systematically by experiments only. By employing our new method, the influence of pattern parameters can be systematically studied, and various novel patterns are designed and optimized within a reasonable time span, with great improvement in LEDs＇ light extraction efficiency （LEE）. Clearly, PSS pattern design with such a method deserves particular attention. We foresee that GaN-based LEDs on these newly designed PSSs will achieve more progress in the coming years.

摘要：与心律不齐联系的客观反常 QT 延伸在糖尿病的病人被认为主要心脏的电的混乱和死亡的一个重要预言者。为糖尿病的 QT 延伸的精确离子的机制仍然保持不清楚。现在的学习被设计在糖尿病的兔子心分析室的极化和内在的离子的机制的变化。方法糖尿病被 alloxan 的单个注射导致(145mg/kg， iv ) 。在糖尿病(10 个星期) 的发展以后， ECG 被测量。整个房间的补丁夹钳技术被使用记录行动潜力持续时间(APD50， APD90 ) ，慢慢地激活的向外修正的钾电流(Iks ) ， L 类型钙水流(Ica-L ) 和里面的修正钾电流(IK1 ) 。室的 myocytes 的行动潜力持续时间(APD50 和 APD90 ) 显然是的结果从 271.5 32.3 ms 延长了并且 347.8 ??  ? 洠瑩 ' 覞湏硺 L 污 ??????? 祭景扩楲獬 ???????? 吗？？

摘要：提出一种低成本固相烧结制造多孔微通道的方法,设计3种多孔复合微通道,并通过优化烧结工艺,制备具有高孔隙率的多孔复合微通道。研究多孔复合微通道的流动阻力和传热性能。结果表明:在流动阻力可接受的范围内,传热性能显著增强,而且流动沸腾也得到强化。将多孔复合微通道结构应用在对流传热领域具有良好的前景。

摘要：针对欠驱动无人艇开展了其基础运动控制策略设计的研究.首先详细地介绍了喷水推进无人艇的运动控制系统的构成,并根据喷水推进器推进原理的特点,可得出该无人艇系统是欠驱动的、快变的非线性耦合系统;然后根据人类小脑的运动协调功能,提出基于倒车斗、喷嘴转角和发动机转速协调控制的仿人智能控制策略,实现了对无人艇的完全运动控制,提高了其操纵性和灵活性;并根据该思想设计了无人艇的基础运动控制系统的软件体系结构.最后进行了无人艇在各种航行状态下的运动控制仿真试验,仿真结果表明了该仿人智能运动控制策略的有效性.

摘要：以金属硝酸盐为原料,通过乙二胺四乙酸(EDTA)络合法制备了尖晶石型Ni1-xZnxFe2O4(x=0.0-0.7)晶体。通过TG-DTA考察了制备过程,采用XRD、FT-IR、SEM和VSM等对产物进行了表征,研究了热处理温度和Zn取代量对晶型结构和磁学性质的影响。同传统的固相法相比(1300℃/20h),制备单相Ni-Zn铁氧体所需的焙烧温度降至700℃,焙烧时间缩短至2h。随着Zn取代量的增加,晶胞参数递增,而矫顽力(Hc)和居里温度(Tc)逐渐下降。饱和磁化强度(Ms)随Zn取代量呈先递增至x=0.4后再逐渐下降。在1.5MHz的交变磁场中,所制粒子的感应温度接近设计的居里温度,能够适于感应加热的应用。

摘要：Based on the traditional Smoothed Particle Hydrodynamics (SPH) algorithm, the linked-list search algorithm combined with the variable smoothing length and square support domain was put forward to improve the calculation efficiency and guarantee the calculation accuracy. The physical process of high velocity fragment impact on a broadside liquid cabin was programmed for simulation. The numerical results agreed well with those of the general software ANSYS AUTODYN, which verifies the effectiveness and feasibility of the numerical method. From the perspective of the outer plate thickness of the liquid cabin, the width of the liquid cabin, and incident angle of the fragment, the influence of these parameters on protective mechanisms was analyzed to provide a basis for protective design of a broadside liquid cabin. Results show that the influence of outer plate thickness is not obvious; therefore, the conventional design can be adopted in the design of the outer plate. The width of the liquid cabin has a great influence on the residual velocity of the fragment and the width of the liquid cabin should be designed to be as wide as possible under the premise of meeting other requirements. There is a certain incident angle in which the velocity attenuation of the fragment is most obvious, and the high-pressure zone near the inner plate is asymmetric. The inner plate of liquid cabin should be strengthened according to the hull form, principal dimensions, and vulnerable points.

摘要：制动器的设计与选型是桥式起重机生产过程的重要环节,制动器的位置与布局关系起重机的运行平稳与安全。以10 t桥式起重机为设计对象,对起升机构进行动力学分析,建立了数学模型,计算了数学模型所需的转动惯量;并对制动器不同布置方案进行了计算与仿真,利用Matlab软件得到了制动器制动的最大力矩,分析得出了制动器设计的最优方案。

摘要：本文提出一个回波序列,它由四个90和一个45脉冲构成,具有较宽的激发带宽和较短的激发时间,可用于氘核NMR固体线型的测量之中,数值计算结果表明该回波序列的激发带宽几乎比传统的四极回波宽一倍。~2D-PMMA粉末样品的实验结果证实了本文设计的回波序列的优越性。