摘要：为了在满足高速磁浮列车安全连续运行需求的前提下节约建设成本,提出了一种基于速度防护曲线的辅助停车区设置算法.在此基础上给出了一种基于基准运行速度曲线的辅助停车区算法,同时能满足多目标速度曲线并存的线路上列车安全连续运行的要求.考虑了列车运行控制系统安全性的要求,给出了工程应用中相应的辅助停车区调整方法,并在一定工况条件下进行了仿真计算,结果表明该辅助停车区算法能在一定程度上降低高速磁浮交通系统的建设成本.

摘要：内台阶锥形环件是工业中的一种典型金属结构,相对于其它内锥形、外锥形和梯形环件而言,具有中部连续渐变、两端突变的特点。文章针对内台阶锥形环件的这一特点,首次提出了横截面变化率的定义,并将此定义用于内台阶锥形环件锻件设计,得出改进此类锻件轮廓的一般规律。对于给出的锻件及其改进方案,用弹塑性动力显式有限元方法进行辗扩塑性变形过程的模拟,证实了横截面变化率作为锻件改进的依据是可行的,所提出的锻件设计方法对于类似内台阶锥形环件辗扩工艺设计具有指导意义。

摘要：This study combined fault identification with a deep learning algorithm and applied a convolutional neural network(CNN)design based on an improved balanced crossentropy(BCE)loss function to address the low accuracy in the intelligent identification of seismic faults and the slow training speed of convolutional neural networks caused by unbalanced training sample *** network structure and optimal hyperparameters were determined by extracting feature maps layer by layer and by analyzing the results of seismic feature *** BCE loss function was used to add the parameter which is the ratio of nonfaults to the total sample sets,thereby changing the loss function to find the reference of the minimum weight parameter and adjusting the ratio of fault to nonfault *** method overcame the unbalanced number of sample sets and improved the iteration *** a brief training,the accuracy could reach more than 95%,and gradient descent was *** proposed method was applied to fault identification in an oilfield *** trained model can predict faults clearly,and the prediction results are basically consistent with an actual case,verifying the effectiveness and adaptability of the method.

摘要：A prototype thick-GEM-based cooling storage ring external-target experiment(CEE) time projection chamber(TPC) is constructed and tested with the pulsed ultraviolet laser beams. The results indicate that the prototype TPC has a good performance in three-dimensional track resolution. In X direction the position resolution is about 0.2 mm, and in Y direction the position resolution is about 0.5 mm. The results also determine that the energy resolution is about 5.4%, which achieve the requirements of the CEE experiment and can be used to study the nuclear state equation and the quantum chromo dynamics.

摘要：本文在计算模型采用分块非结构化六面体网格的基础上,利用雷诺平均N-S方程,标准k-ε紊流模型,结合 SIMPLEC算法,数值模拟了旋流泵的内部流动,得到了旋流泵压力面、吸力面上的压力分布,同时也估算了叶轮的效率, 比较了旋流泵试验性能与数值模拟性能,有助于了解旋流泵的内部流动特性,指导旋流泵的水力设计。

摘要：This paper introduces the approach types of agricultural technology promotion we can choose in the process of new countryside construction, and there are mainly 6 types, namely government-domination-oriented approach, market-development-oriented approach, university (scientific research institution)-education-oriented approach, farmers' participation-oriented approach, direct-training-oriented approach and individual-service-oriented approach, including 20 models. The problems existing in the grass-root agricultural technology promotion in the process of new village construction are analyzed as follows: the awareness of innovation is not strong; scientific research, education, and promotion are disjointed; the construction of specific work system lags behind; the structure of promotion team is irrational, and the quality of promotion personnel is yet to be promoted; the cultural quality of farmers is low, and the cooperative organizations are not sound; the working conditions are poor, and the basic security is inadequate; the investment channel is simple and the supply amount is badly short; the methods of agricultural technology promotion do not adapt to the requirements of new situation. According to the characteristics and internal requirements of grass-root agricultural technology promotion, we creatively design an overall working model, and put forward new measures from objective of grass-root agricultural technology promotion, service object, service content, organization work and scope, method, role of agricultural technology personnel and so on.

摘要：电容式微机械加速度计是一种将加速度转换成差分电容、通过检测差分电容的变化来检测加速度大小的一类高精度的惯性传感器。利用开关电容电路实现C-V变换,利用反馈静电力实现力平衡闭环控制,设计了一种电容式微机械加速度计。通过构建电容式加速度传感器及外围电路的数学模型,推导了闭环工作的系统函数。并对实际系统进行研制,最后给出了整个系统的测试结果。

摘要：针对虚拟森林灭火仿真需要支持多种不同要素可同时参与灭火仿真的功能需求,提出了一种基于HLA的可扩展的分布式森林灭火仿真体系结构,基于这种结构,仿真用户可以通过目标系统重组的方式构建具体的联邦应用系统,并就系统设计、开发过程中的关键技术,如FOM/SOM设计、联邦成员框架结构设计,仿真运行机制,时间策略设置等分别作了深入研究,在此基础上完成了森林灭火仿真原型系统的设计与开发。

摘要：改进了以往采用数学函数生成初始构件的概念设计过程,提出了一种基于分形的交互式创新概念设计系统的实现方法。给出了一个建筑造型创新设计实例:初始化种群先经分形化的嵌套、拟态等操作再进化计算,使生成的建筑体具有分形自相似的特征。实验表明,分形在创新进化系统中有很好的应用前景。

摘要：结合实际项目,设计了自动机械变速器(AMT)联调试验台系统.运用汽车动力因数计算车辆等效质量,提出分段模拟车辆行驶阻力试验方案,对飞轮系统进行优化设计,实现了AMT联调试验台可变惯量的模拟加载与匹配.实际应用表明,AMT联调试验台系统符合使用要求.