痕量炸药SERS探测方法研究进展

痕量炸药探测技术在维护国家安全和开展军事行动中至关重要.随着战场排雷、反恐搜爆的迫切需求,具有分子"指纹"信息的表面增强拉曼散射(Surface-enhanced Raman scattering,SERS)方法受到广泛关注与研究.从SERS基底设计与炸药分子吸附浓缩两个方面,全面综述了痕量炸药SERS探测方法的研究现...     

A game theoretical study of cooperative advertising with multiple retailers in a distribution channel

Extant studies of cooperative advertising mainly consider a single-manufacturer-single-retailer channel structure.This can provide limited insights,because a manufacturer,in real practices,usually deals with multiple retailers simultaneously.In order to examine the impact of the retailer’s multiplicity on channel members’ decisions and on total channel efficiencies,this paper develops a multiple-retailer model.In this model,the manufacturer and the retailers play a Stackelberg game to make the optimal advertising decisions.Based on the quantitative results,it is observed that:1) When there are multiple symmetric retailers,as the number of retailers scales up,the manufacturer’s national advertising investment contributes increasingly to add to channel members’ profits in equilibrium,but the total channel efficiency deteriorates quickly and converges down to a certain value;2) When there are multiple asymmetric retailers,the distribution channel suffers from the manufacturer’s uniform participation strategy due to the retailer’s free-riding,and benefits with the manufacturer’s retailer-specific participation strategy.This study derives equilibrium solutions in closed form for all games considered and measures explicitly the gains/losses of channel efficiencies under different game settings.     

关于一集类圆柱投影的探讨

本文所要探讨的是一集类圆柱投影。它不同于伪圆柱投影,而属于标准线型投影族的一个新类型;其中包含着两个新型的等面积投影。     

LD泵浦的YAG-KTP腔外倍频激光器

研制成我国第一台用ＬＤ泵浦的ＹＡＧ－ＫＴＰ腔外倍频激光器，阈值泵浦功率为３１．８ｍＷ，输出功率为０．２ｍＷ，斜效率为２％。文中简单报导了实验方法和实验结果。     

一种LD泵浦的新型自倍频激光器─M－NYAB与NYAB自倍频激光器的对比

研制成功世界上第一台ＬＤ泵浦的Ｍ－ＮＹＡＢ自倍频激光器。比目前ＬＤ泵浦的ＮＹＡＢ自倍频激光器性能更好：输出波长为０．５３１μｍ的绿色激光，容易得到基横模运转，阈值泵浦功率降低三分之一以上，为８．２ｍｗ，输出功率达到２２．５ｍＷ，斜效率达３．８％。文中简单报导了实验结果。     

多片摩擦片式液压制动器及其间隙补偿装置

多片摩擦片式液压制动器及其间隙补偿装置是一种新型制动器，本文着重阐述了如何对其结构及参数的合理设计、计算等。使制动器无需进行复杂的预调，摩擦片磨损后能自动补偿，始终保持最佳间隙和制动行程。该制动器不但制动力矩大，且具有工作寿命长、调整方便、制动迅速、及安全可靠等优点。     

Reconstruction of HaSNPV with helicoverpa hormone receptor 3

In order to develop a more efficient virus for controlling the cotton bollworm Helicoverpa armigera, Helicoverpa hormone receptor 3 （HHR3）, which is involved in the ecdysteroid regulatory pathway, was used to genetically modify wild HaSNPV. HaSNPV-HHR3 budded virus and occlusion body virus were constructed in three steps： preparation of pFastBacHaPhpP10-HHR3 donor plasmid, transposition of HHR3 into the HaBacHZ8 bacmid, and transfection of HzAM1 cells to get HaSNPV-HHR3 virus.HHR3 was proved to be expressed in the HaSNPV-HHR3 virus infected HzAM1 cells by immunoblotting. Results of bioassay indicated that the body weight of the HaSNPV-HHR3 infected larvae was lower than the larvae infected with wild virus and uninfected normal larvae, which suggests that HaSNPV-HHR3 delayed larval growth.     

低有效应力状态下疏浚泥不排水强度试验研究

运用平板贯入剪切法对自重固结后的高含水率疏浚泥进行不排水强度试验,探讨低有效应力状态时试验结果表明,疏浚泥自重固结后的不排水强度随含水率的增加而非线性降低。在相同含水率时,自重固结后的不排水强度显著大于重塑状态时的不排水强度。同时高含水率疏浚泥自重固结后的不排水强度随有效应力的变化关系与天然沉积土的强度包线相似,当有效应力小于0.2 kPa时,不排水强度随有效应力的变化较小,当有效应力大于0.2 kPa时,不排水强度随有效应力的增大而增大。     

Admissibility analysis and control synthesis for switched linear singular systems

The problem of admissibility analysis and control synthesis of discrete-time switched linear singular (SLS) systems for arbitrary switching laws is solved. By using the switched Lyapunov function approach, some new sufficient conditions under which the SLS system is admissible for arbitrary switching laws are derived in terms of linear matrix inequalities (LMIs). Based on the admissibility results, control synthesis is then to design switched state feedback and static output feedback controllers, guaranteeing that the resulting closed-loop system is admissible. The presented results can be viewed as the extensions of previous works on switched Lyapunov function approach from the regular switched systems to singular switched cases. Examples are provided to demonstrate the reduced conservatism and effectiveness of the proposed conditions.