Linux内核中双口RAM驱动开发及在大圆机控制系统中的应用

在三星S3C6410硬件平台上,开发了基于Linux3.0.1内核的双口RAM驱动程序。双口RAM驱动程序遵循"机制"与"策略"相分离的设计思想,实现了对双口RAM随意读、写操作的机制。根据该操作机制和大直径提花圆纬机的控制特点,设计了应用程序对双口RAM的访问策略。实验结果表明,大圆机控制系统启动时能加载双口RAM驱动程序并正确识别双口RAM,大圆机控制系统能通过双口RAM实现上下位机的参数传递。     

南方“工程之星3.0”数据采集方法

RTK是能够在野外实时得到厘米级定位精度的测量方法,它采用了载波相位动态实时差分方法,它的出现在工程放样、地形测图,各种控制测量等测量工作中,极大地提高了外业作业效率。根据笔者多年测量经验,地形测图方面采用的方法:运用实时动态(RTK)测量技术,结合南方数码公司"工程之星3.0"软件,采用清华三维编码、简码方式采集野外数据,用VB小程序进行数据格式转换,在"南方CASS7.0成图系统"软件,展现数字化地形图。     

不同荷载与层间接触条件下沥青路面力学分析

利用BISAR 3.0程序,分析沪宁高速公路扩建工程的实体路面结构受力情况,得出不同荷载与层间接触条件下,路面结构拉应变、最大剪应力、竖向剪应力、拉应力的分布特征与变化规律,在此基础上,又分析了对路面使用性能的影响。结果表明：超载引起半刚性基层、沥青面层、底基层两个界面层间滑动,进而使整个路面结构受到破坏。     

PLC和iFIX在化工过程自动控制系统中的应用

针对某化工生产过程,详细介绍了一种基于S7-300PLC和iFIX3．0组态软件的自动控制系统。该系统集成化程度高,稳定、可靠,目前运行良好。     

金融IC卡规范脱机动态数据认证的漏洞研究

对《中国金融集成电路(IC)卡规范》(JR/R 0025,简称PBOC)第5部分、12部分、13部分、14部分中脱机数据认证机制的安全性进行了研究,分析了脱机数据认证机制抗侧信道攻击、差分错误分析以及字典攻击的能力,防止伪卡的能力,提出了规范实现过程中存在的安全漏洞。通过实际客户的银行卡片对漏洞进行了验证。结论表明该漏洞存在实际使用卡片中。最后提出了规范修改建议,以规避这种安全漏洞。     

基于Pro/E和MoldFlow的风扇造型及其翘曲参数优化

以电脑风扇为例,采用计算机辅助软件Pro/ENGNIEER Wildfire3.0和有限元分析软件MoldFlow相结合的方法对其进行三维建模及翘曲参数优化设计,阐述了零件复杂曲面分模面的构建方法,分析其翘曲原因并优化其影响参数,使翘曲变形量达到允许范围,从而为复杂曲面建模及其分模面设计和翘曲变形优化提供理论依据,缩短模具设计周期,提高产品质量.     

Significant association of a single nucleotide polymorphism in the upstream region of FGFR1OP2/wit3.0 gene with residual ridge resorption of mandible in Saudis

Residual ridge resorption (RRR) is the decrease in the jaw structure that follows tooth extraction. It is amultifactorial disorder, but reports on the associated genetic factors are scarce, particularly amongst the Saudis. Thisstudy aimed to investigate the role of single nucleotide polymorphisms (SNPs) in fibroblast growth factor receptor1 oncogene partner 2 (FGFR1OP2) in RRR development in Saudis. The study included 192 individuals (RRR = 96;controls = 96) attending outpatient clinics at the College of Dentistry, King Saud University. Demographic and clinicaldata were collected, the digital panoramic dental radiograph was obtained, and mandibular residual ridge heightwas measured. DNA was extracted from saliva and genotyping was conducted on “Sequenom MassARRAY iPLEX”.Genotype and allele frequencies of three SNPs were calculated and compared. The age at first diagnosis and bone heightwere compared in the three genotypes of each SNP. The age of the patients, age at first edentulism, and bone heightranged 21-80 years, 12-70 years, and 13-34.6 mm, respectively. All three genotypes of the studied SNPs (rs2279351,rs78054962 and rs2306852) were identified. SNP rs2279351 associated significantly with RRR, and the mutant Callele was highly predisposing. No association was observed for the other two SNPs. The genotypes of all SNPs had aninfluence on age at first edentulism and bone height, but the results were not statistically different. Since FGFR1OP2plays a role in the process of rapid wound healing in the oral cavity, it may be playing a role in the development ofRRR by influencing the rate of resorption of the jawbone. SNP rs2279351 may alter its expression and hence RRRdevelopment. This study is limited due to small a sample size, and further large-scale studies are required to confirmthis association and to consider rs2279351 as a possible marker of RRR development.