Research of Communication Mechanism of the Multi—agent in Multi—agent Robot Systems

The cooperation of multi-robot that is based on the multi-agent system (MAS) theory of distributed artificial intelligence has become a hotspot in the robotics R&D. In the research the multi-robot is regarded as multi-agent. So the communication and cooperation of multi-agent become the key problem for gaining the dynamic running information of cooperating robots. In this paper the authors introduce the communication modes for agent and provide a common strategy which aims at the communication resources of multi-agent model-the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol which is based on the transmittal medium. It supports the cable-communication of multi-robot and the experiments prove its validity.     

Circular dichroism spectroscopic studies on structures formed by telomeric DNA sequences in vitro

Telomere plays an important role in cellular processes, such as cell aging, death and carcinogenisis. Having special sequences, it can form quadruplex structure in vitro. Circular dichroism (CD) spectroscopic studies show that TTAGGG, (TTAGGG)2 and (TTAGGG)4 can all form quadruplex in vitro and exist mainly as parallel quadruplex without metal ions. Both K+ and Na+ can stabilize the tetrameric structure and facilitate the forming of anti-parallel conformation. Furthermore, the conformations of quadruplex can also be affected by sequence length, the nature and concentration of metal ions.     

网络镜像光盘服务器在EI检索实习中的应用

结合教学实践，介绍了网络镜像光盘服务器的功能及其在EI检索实习中的使用方法。     

CD4+CD25+Foxp3+调节性T细胞在口腔鳞状细胞癌中的表达及意义

目的探讨CD4~+CD25~+Foxp3~+调节性T细胞在口腔鳞状细胞癌中的表达情况.方法应用免疫组化SP法检测42例原发口腔鳞状细胞癌患者的癌组织和20例口腔良性肿瘤患者正常黏膜上皮组织中Foxp3的表达,采用χ2检验进行统计学分析.结果 Foxp3阳性的CD4~+CD25~+调节性T细胞在口腔鳞状细胞癌中的表达显著高于正常口腔黏膜组织,差异具有显著统计学意义(P0.01).Foxp3蛋白表达与肿瘤分化程度相关,在高、中分化组为63.64%,低分化组为100%,差异具有统计学意义(P0.05).且其阳性率与肿瘤TNM分期相关,Foxp3蛋白表达在Ⅲ~+Ⅳ期阳性率为88.24%,在Ⅰ~+Ⅱ期表达的阳性率为60%(P0.05).Foxp3蛋白表达与患者年龄、性别、淋巴结转移未见明显相关性(P0.05).结论 CD4~+CD25~+Foxp3~+Treg细胞在口腔鳞状细胞癌中的大量浸润与肿瘤的发生、发展、浸润、转移密切相关,可能是导致口腔鳞状细胞癌患者不能进行有效抗肿瘤免疫的重要原因之一.     

CD14基因多态性与强直性脊柱炎的关联性研究

目的探讨CD14基因rs2569190位点的单核苷酸多态性与强直性脊柱炎易感性的关系.方法采用PCRRFLP方法对240例AS患者进行CD14基因多态性检测,并与140名健康对照者进行对比.结果 rs2569190位点基因型频率两组间差异具有统计学意义(χ~2=6.778,υ=2,P0.05);强直性脊柱炎组携带突变体A基因的频率高于对照组,差异具有统计学意义(χ~2=3.876,υ=1,P0.05).结论 CD14基因rs2569190位点单核苷酸多态性与强直性脊柱炎易感性存在关联,携带CD14突变体A基因者患AS风险较大.     

Detection of CD2 expression in chicken hematogenic embryo yolk sac lymphoid cells prior to thymus genesis

Lymphoid mononuclear cells from chick embryos at stage 16 were collected prior to fetal liver and thymus genesis to study the differentiation and function of the hematogenic yolk sac and to detect whether CD2 occurs on the surface of lymphoid mononuclear cells. The phenotype and functional activity of the cell surface protein E receptor and the ultrastructure of embryonic E＋ cells were compared with those of mature T cells. Our results indicate 99.36% homology between the E receptors of embryonic lymphocytes and mature T cells. Other similarities, including molecular distribution, motivation, the ability to form an erythrocyte rosette, the structure of the receptor-ligand complex, and the conformation of the signal channel, were detected between embryonic lymphocytes and mature CD2-expressing T cells. These results indicate that CD2 is already expressed prior to fetal liver and thymus genesis and that its expression is not dependent on the thymic microenvironment.     

构建多元化的随书光盘管理模式——对武汉图书馆随书光盘管理利用的思考

分析了武汉图书馆随书光盘管理的现状,并对国内图书馆现有的随书光盘管理模式进行了比较和研究,提出了多元化随书光盘管理模式。     

随书光盘的管理与信息服务实践——以陕西师范大学图书馆为例

以陕西师范大学为例,分析了随书光盘的管理利用现状及遇到的问题,并提出了解决的对策。     

GHOST 在零维护微机系统中的应用

本文从系统备份的重要性入手,论述了将系统文件备份到光盘上的必要性,详细介绍了利用GHOST软件制作自动恢复微机系统光盘的方法。     

图书馆带书光盘的逻辑区分管理

对现阶段带书光盘资源的管理和编目加工方式进行了探讨,提出了应该根据光盘与书的逻辑关系进行区分管理和编目加工的建议。