适用于TEDS系统的AMC与HARQ结合算法

研究陆地集群无线电增强数据业务（TEDS）中的自适应调制编码（AMC）与HARQ结合算法. 该算法采用基于SNR的切换门限判别法进行调制编码方式的选择,采用大数逻辑译码算法进行重传数据帧的合并. 仿真结果验证了所提出的算法可有效地提高TEDS系统数据传输的可靠性,当最大重传次数为2时,所提出的算法能够使系统的误帧率由36.49%下降到6.93%.      

Finite element models and molecular dynamic simulations for studying the response of mast cell under mechanical activation

In micropipette aspiration experiment, increasing mechanical stress applied to cell membrane induced degranulation of mast cell as well as a current that could be inhibited by an inhibitor, which is specific for the transient receptor potential vanilloid （TRPVs） channels. To determine the sensitivity of TRPVs to membrane strain and tension, and to gain new insights into the activation mechanism of TRPVs, finite element models of mast cell and molecular dynamic simulations of human aquaporin-1 are presented. During the finite element simulations, the cell membrane sustained to micropipette aspiration was simulated, and the strain distribution along membrane thickness direction was obtained. Besides, combining the finite element models of osteoblast aspirated into micro- pipette and other compared models, we examined the relationship between cell mechanical stimulations and mechanical attributes and presented a new perspective to determine the cell equivalent elastic modulus. Consid- ering the indetermination of TRPV crystal structure, human aquaporin-1, one kind of the channel membrane proteins, substituting for TRPV, has been studied with molecular dynamic （MD） simulations, under different external lateral tensions which have been obtained in mast cell finite ele- ment simulations, to investigate the mechanical stimulation effects on the membrane channels. The simulations show that human aquaporin-1 undergoes significant conforma- tional change and expands in accordance with lateraltension, which not only confirms the tendency of the pre- vious electrophysiological experiments but also leads us to a better understanding of TRPVs. The multi-scale study combining finite element simulation and MD simulation is a significant breakthrough in the field of mechanical mechanism in cell system.     

Progress of transition metal-catalyzed cross-coupling mediated by PyBroP

In the transition metal-catalyzed cross-coupling reactions, phenol and enol derivatives activated by phos- phorus groups are very important electrophiles. This kind of compounds has the advantages of easy preparation, great stability, and producing more benign phosphorus by-pro- ducts. The present work provides a comprehensive review of the advances made over the past several decades in this area. Cross-coupling reactions mediated by PyBroP are first surveyed, then two types of recently developed tran- sition metal-catalyzed reactions, i.e., Pd-catalyzed and Ni- catalyzed reactions, and the corresponding mechanisms are discussed. Finally, future directions are analyzed.     

OTN技术在传送网中的应用探讨

OTN(光传送网,Optical Transport Network)兼有SDH/SONET技术和WDM技术优势的传送层技术,它基于ITU-T制定的G709、G798、G872、G873.1、G959.1等建议,可在光层及电层实现波长及子波长业务的交叉调度,对已有的SDH和WDM的传统优势进行了更为有效的继承和组合,同时扩展了与业务传送需求相适应的组网功能。OTN技术必将成为传送网中未来的主要发展方向。     

Sb掺SnO_2的光电性质研究

基于密度泛函理论,我们研究了掺杂浓度为12.5%时Sb掺杂SnO2的电子结构和光学性质,包括能带结构、态密度、介电函数和光学吸收谱.掺杂后的SnO2材料的导电性得到了明显的增强,具有了半金属的性质;费米能级处能带细化,介电常数和光学吸收谱具有对应关系,光学吸收谱峰值发生了蓝移.     

一种表面活性剂废水处理及回用技术

阴离子表面活性剂以直链烷基苯磺酸钠为主,生产生活的广泛应用对水环境及生态均造成不利影响,废水处理达标排放也造成水资源的浪费,通过对各种工艺比较,确定采用电絮凝-MBR-反渗透工艺,保证达标排放,满足回用水要求。     

并行电法在垃圾渗滤液污染动态监测中的应用

为了查明垃圾渗滤液浸染土壤的污染范围、程度及扩散实时动态情况,利用并行电法系统对室内渗滤液浸染模型开展测试工作。根据垂向和面上两种扩散形式,采用不同布置方式,分别得到三维反演立体电阻率值和电极电流变化曲线图。实验结果显示,三维立体成像和不同时刻电极电流变化趋势两者结合使用,可圈定渗滤液浸润垂向和面上扩散特征,具有时空控制的全面性。此项技术可为实地污染区的探测提供技术支撑。     

非电中央空调Modbus RTU从站设计

采用Modbus RTU通信协议实现系统信息化集成是天然气分布式能源站提高能源利用率的有效管理方法,能源站系统中采用PLC控制的非电溴化锂中央空调主机通常采用程序扫描的方式实现Modbus RTU通信,通信效率低,本文针对程序扫描通信方式的缺点详细介绍了OMRON C200HG系列PLC使用中断方式实现Modbus RTU从站通信的设计方法,提高了非电溴化锂中央空调主机和能源站系统的通信效率．     

电流变弹性体的制备及其力学性能测试

采用硅油、淀粉和硅橡胶作为原材料,采用不同的比例和在不同的条件下,制备了两种类型电流变弹性体,并将其进行了力学性能实验测试.通过实验验证了电流变效应存在于电流变弹性体中,表明,它具有刚度可控的特征.电流变弹性体响应快速、可逆可控、稳定性好且不易沉降,将具有广泛的潜在工程应用前景.     

自然电场法与激电法在找矿中的应用

本文探讨了都兰县诺木洪乡金水口一带石墨矿普查激电法和自电法应用效果,为昆仑山地区同类型矿床提供借鉴。本区先后进行了自然电位扫面和大功率激电中梯扫面工作,找矿标志为电位负异常、低阻高极化特征。自电和激电异常十分明显,并且与已知石墨矿化点吻合很好,在部分覆盖区也产生了强烈的激电异常。地质测量及地表工程表明,异常对找矿起到了直接指导作用。通过两种方法的相互验证、相互补充,大致确定了矿(化)体的形态、规模、及深部延深情况,取得了良好的应用效果。