双曲柄环板式针摆行星传动中平行四杆机构运动性能分析

针对双曲柄环板式针摆行星传动中的平行四杆机构，运用动力学原理分析了杆长尺寸随机误差对机构中铰链支反力的影响，并建立了力分析模型，为在设计双曲柄环板式针摆行星传动时更好地计算各构件的强度、运动可靠性等提供了一定的理论基础．     

量子信息论与量子计算中的一类数学问题

利用组合计数理论、数列和级数知识，采用构造证明的方法研究了量子计数问题，解决了量子理论中的一些计数问题，证明了几个量子计算中的等式。这些结果即将在其他学科中得到广泛的应用。     

An Intelligent Master Model of Computer Aided Process Planning for Large Complicated Stampings

Process planning for large complicated stampings is more complicated, illegible and multiform than that for common stampings. In this paper, an intelligent master model of computer aided process planning （CAPP） for large complicated stampings has been developed based on knowledge based engineering （KBE） and feature technology. This innovative model consists of knowledge base （KB）, process control structure （PCS）, process information model （PIM）, multidisciplinary design optimization （MDO）, model link environment （MLE） and simulation engine （SE）, to realize process planning, optimization, simulation and management integrated to complete intelligent CAPP system. In this model, KBE provides knowledge base, open architecture and knowledge reuse ability to deal with the multi-domain and multi-expression of process knowledge, and forms an integrated environment. With PIM, all the knowledge consisting of objects, constraints, cxtmricncc and decision-makings is carried by object-oriented method dynamically for knowledge-reasoning. PCS makes dynamical knowledge modified and updated timely and accordingly. MLE provides scv. cral methods to make CAPP sysmm associated and integrated. SE provides a programmable mechanism to interpret simulation course and result. Meanwhile, collaborative optimization, one method of MDO, is imported to deal with the optimization distributed for multiple purposes. All these make CAPP sysmm integrated and open to other systems, such as dic design and manufacturing system.     

利用直流发电机模拟海船螺旋桨的研究

论述利用直流发电机模拟海船螺旋桨的可行性分析,介绍系统组成、工作原理以及主要参数的设计,并给出系统的仿真结果.     

超大断面公路隧道浅埋段施工技术

随着公路建设规模日益扩大,3车道、4车道的超大断面公路隧道越来越多。隧道浅埋段覆盖层薄、围岩稳定性差,开挖时易出现坍塌等工程事故,是超大断面隧道施工技术的重点和难点。结合深圳盐排高速公路盐田隧道的施工实践,介绍浅埋段施工的一些经验和技术体会,可为类似工程施工提供参考。     

我国城市交通现状的问题分析及发展对策

通过对我国城市交通现状及存在问题分析,针对城市产生交通问题的原因,探讨缓解城市交通问题的可行措施。建议通过制定可持续发展的城市交通发展战略、加强城市总体规划、完善城市道路设施、发展公共交通、应用智能交通技术等措施提高城市交通管理技术和水平,改善城市交通环境。     

Fast Mode Decision Method Based on Historical Information for H. 264/AVC

Mode decision based on rate-distortion optimization algorithm brings high compression efficiency to H.264/AVC. However, heavy computation load is also added to the encoder at the same time. In order to reduce the computation burden of mode decision, this paper presented a fast mode decision method based on mode information of the previously coded frame. Moreover, all coding modes were activated when scene change occurs and a scheme to detect scene change was proposed. The simulation results show that compared to the original encoder, the proposed method achieves a reduction of over 38% encoding time and keeps almost the same PSNR and bitrate for a wide range of quantization parameter.     

我国高校本科教学评估中的人文关怀

我国教学评估工作之所以能在困难中稳步推进，由于评估依据、方针、内容和整个教学评估过程中的人文关怀起到了重要作用。普通高等学校本科教学工作水平评估在评估依据、评估内容、评估过程和结果中无一不体现出一种浓浓的人文关怀，正因为有了这种人文关怀，我国高等教育才能健康、和谐地发展。     

汽油车加油排放影响因素分析

通过对影响汽油车加油排放的外界环境（雷德蒸汽压）、裹入的空气速率和油箱的温度以及蒸发质量分数等主要因素进行分析,发现加油排放速率随空气的裹入速率和油箱的温度的变化呈线性关系;在给定的蒸发质量分数的条件下,汽油蒸汽压力的自然对数与温度的倒数呈线性关系;通过比较发现,车载汽油蒸汽回收装置的回收效率达93.9%以上.研究结果表明,可以通过降低雷德蒸汽压、降低空气的裹入速率和油箱的温度等途径来实现减少加油过程的排放.     

软弱围岩偏压连拱隧道施工方法优化模拟研究

偏压连拱隧道不同的施工方法对岩体的受力特征和稳定性有着截然不同的影响,在地质条件较差的情况下该影响更为明显.本文运用FLAC2D对隧道合理开挖方法进行二维数值模拟研究,分析了某隧道在台阶法及双侧壁导坑法下围岩和中隔墙的应力应变情况,并分别对先开挖埋深较浅的一侧和先开挖埋深较深的一侧两种不同施工顺序进行分析比较,提出了类似条件下建议的施工方法.