冲击对泵浦激光器反馈片紫外胶连接性能的影响

通过试制样品的有功率性能测试和无功率性能测试的冲击实验,分析了超小型泵浦激光器反馈片紫外胶连接抗冲击性能影响因素,结果表明,样品外壳冲击变形的局部应力导致反馈片胶连接产生冲击裂纹损伤;样品冲击后的功率一电流一温度（P一,一T）性能测试的热胀冷缩产生热应力,促进了胶连接内亚裂纹扩展并形成了絮状纹,且促进反馈片胶连接冲击裂纹扩展并成为新的裂纹生长的潜在因素,劣化了胶连接性能．     

自动化散货装船机物位检测技术

为使散货装船机在安全作业的前提下自动、快速、高效地完成装船作业,利用安装在散货装船机上的激光雷达,通过多轴伺服运动机构控制激光雷达进行旋转,完成对船舱的三维轮廓扫描.通过后台截面边缘提取算法与图形拟合算法相结合的图像处理算法,自动、实时获取船舱尺寸以及舱内物料的形状,确定落料轨迹,为散货装船机的自动化作业提供基础.天津港煤码头的多次装船试验验证此方法的可行性.     

跟腱末端病大鼠低功率激光治疗前后蛋白多糖含量的变化

以末端病大鼠为实验对象,通过低功率激光照射其跟腱,观察低功率激光对末端病大鼠跟腱组织中蛋白多糖含量的动态变化,探讨低功率激光对末端病跟腱损伤后恢复的影响及其机制,结果表明：低功率激光照射促进蛋白多糖的合成,调节细胞外基质,减少疤痕形成,蛋白多糖与胶原共同促进跟腱愈合,提高跟腱修复质量。     

网络安全与防护的应用实例研究

近些年,网络技术发展迅速,而由网络导致的安全问题也日益突显,网络安全受到威胁,网络防护成了网络信息产业研究的重要课题。校园网面临的威胁主要来自内部破坏与外部攻击两个方面。加强网络安全可以从网络安全隔离、网络监控措施、网络安全漏洞、网络病毒的防范四个方面入手。     

不同干燥方式对YAG粉末性能的影响

以硝酸铝[Al（NO3）3.9H2O]和硝酸钇[Y（NO3）3.6H2O]为原料,碳酸氢铵[NH4HCO3]为沉淀剂,PET400为分散剂。采用共沉淀法制备了YAG前驱体粉末,分别用直接干燥和共沸蒸馏对YAG前驱体粉末进行脱水处理。用X射线仪、扫描电子显微镜、粒度分析仪等测试手段对产品进行表征。结果表明：采用共沉淀法,在1200℃煅烧1h,相对于直接烘干,共沸蒸馏制得的YAG粉末纯度更高,粒度更细,分布更均匀,团聚较少。     

基于CO2激光加工机的木材雕刻工艺参数研究

对木质材料不同参数CO2激光雕刻效果进行了比较分析,找出毛边少、黑度小的木质材料最优雕刻工艺参数。实验测得木质三合板点射最小加工需要的能量阂值为2．52×10^4J／cm^2,最优雕刻工艺参数为：雕刻功率40w,雕刻速率400mm／s;雕刻功率12W,雕刻速率50mm／s。这为今后的实践操作提供了技术参考。     

Proteomic analysis of primary colon cancer-associated fibroblasts using the SELDI-ProteinChip platform

Objective: Cancer-associated fibroblasts (CAFs) are one of the hallmarks of the cancer microenvironment. Recent evidence has indicated that CAFs are more competent in enhancing cancer cell growth and migration than normal fibroblasts. However, the unique protein expression of CAFs has not been fully elucidated. This study aims to investigate the characterizations of colon CAFs by comparing the differential protein expression between CAFs and normal fibroblasts. Methods: Primary fibroblasts were isolated from surgical specimen of human colon cancer and matched normal colonic tissue. Purity of the cell population was verified through immunostain analysis. Total cell lysates and conditioned media from each group of cells were extracted, and protein expression analysis was conducted using the surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF-MS) ProteinChip platform. Results: Most primary cells showed typical fibroblast-like features after two weeks. Increased proportion of α-smooth muscle actin-positive myofibroblasts was detected within the CAFs in four of the six pairs of primary cells. Fibroblast activation protein was weakly expressed in most cells without differences. Using SELDI-TOF-MS ProteinChip platform, four protein peaks mass over charge ratio (m/z) 1142, 3011, 4035, and 4945 were detected in the total cell lysates, and two protein peaks m/z 1368 and 1389 were detected in the conditioned media. The potential candidate proteins found in the Swiss-Prot database include morphogenetic neuropeptides, FMRFamide-related peptides, insulin-like growth factor II, thymosin β-4-like protein 3, and tight junction-associated protein 1. Conclusions: Using the SELDI-ProteinChip platform, differential protein expressions were identified in colon CAFs compared with normal colonic stromal fibroblasts. The complex proteomic alternations in colon CAFs may play important roles related to the colon cancer microenvironment.     

激光频率分裂与模竞争实验系统构建

与工厂合作,为研究生专业课"现代光学实验"开发出独创的半外腔型激光频率分裂与模竞争教学实验系统,在同一谐振腔中得到频差较大而偏振态正交的2组激光纵模输出,借助扫描干涉仪和数字示波器可观测和记录2组纵模的频率分裂特性和模竞争现象。研究生通过该实验可深刻理解激光器工作原理和纵模形成机制,并研讨利用激光频率分裂特性进行几何量和物理量的测量方法。     

激光通信综合实验演示仪设计

为了演示激光通信技术的基本原理,介绍了一种激光通信综合实验演示仪的设计原理和工作方法.设计出双模式激光发射、光电转换、功率放大和带通滤波相结合的电路,接收光电探测器采集的激光信号,并还原信号实现解调.该实验仪性能稳定、操作方便,并实现了激光调制与通信演示实验的结合,在实际应用中取得了良好的教学效果.     

稳功率氦氖激光器电源的研制

一种新型氦氖激光器电源以直流12V输入,并采用开关电源逆变、倍压整流等技术;摒弃了传统的大电阻恒流的方式,采用了负反馈电路控制电流,减少了功耗,且稳流精度高于2％;还增加了稳功率电路,稳功率精度可达3％以上。