量子微腔中不同原子合作效应之研究

处于量子微腔真空辐射场中的两个不同原予呈现合作效应，其关联程度随两原予各自跃迁频率、腔场频率接近而加强。此种性质非常类似经典宏观力学系统中的共振现象。     

投影分解法的多参数设计与优化及应用

本文针对大型多枝区域上的电磁场问题 ,将投影分解法推广到向多个空间投影的情形 ,并设计了带有多个参数的快速算法 ,大大提高了算法收敛速度 ,实际算例表明迭代次数不到原来的三分之一 .通过对所取参数的分析 ,给出了其最优值表达式 ,使得该算法具有很好的实用性     

管路特性曲线测定实验装置的设计与测试

随着变频技术的发展,它在泵流量调节方面的作用越来越受企业认可。化工原理实验紧跟形势增加了离心泵流量变频调节章节。为了满足实验教学需要,对实验装置进行了设计与测试。该文阐述了实验装置设计思路和测试过程。测试结果表明:该实验装置可以满足实验需要,有助于进一步优化实验结构,培养学生工程观点,丰富更新学生的知识体系。     

制备复合钢管的卡盘夹持式SHS离心机设计

通过SHS离心法试验原理，对卡盘夹持式SHS离心机的结构设计思路、主要特点进行了介绍，实践证明，设计的卡盘夹持式SHS离心机成功制备的外径76mm、长度100mm的陶瓷内衬复合钢管，产品性能稳定。     

宫内节育器异位妊娠原因的临床分析

通过对4年来就诊的858例异位妊娠病人的临床资料进行综合整理,分析放置宫内节育器（IUD）140例与异位妊娠发生率的关系,认为带宫内节育器的妇女易并发盆腔炎症,其异位妊娠的发病率增加,误诊率增高,因此放置宫内节育器前了解适应症和禁忌症是至关重要的.     

论复兴传统吟诵学

吟诵,是读古典诗文的独有方法,是鉴赏古典文学作品类的独特手段,是吟诗填词的入门途径。吟诵之风由来已久,萌发于先秦,发展于魏晋六朝,辉煌于唐代,发扬光大于宋元明清,“五四”新文化运动之后一落千丈。吟诵的要求是：吐字发音准确、清楚、响亮有力,声音饱满、圆润、优美,腔调婉转、圆和、动听,此其一;作者以声传情、用声写象,吟诵者循声感情、依声觅象,此其二;再创意境,充分显示吟诵者的个性,此其三。     

口腔中奋森氏螺旋体与临床症状的分析

目的观察大学生口腔中奋森氏螺旋体的检出率及其临床症状.方法750名健康大学生,取牙垢涂片、革兰氏染色及镜检,自1992年起,每年检查80～120人.结果口腔奋森氏螺旋体的检出率平均为33.2%,自1997年以来检出率显著降低.螺旋体感染严重者,牙龈出血、肿痛、口臭等症状的出现率也高.结论口腔中的奋森氏螺旋体具有一定的致病性,近年来大学生口腔中奋森氏螺旋体的检出率显著下降,可能与口腔卫生及营养状况改善有关,这对减少牙周病的发生有所裨益.     

离心水泵串并联及经济性

本文从离心水泵串并联及其特性曲线入手,分析了离心泵串并联及联合方式的工况,给出了典型的串并联在管路中的连接方式,指出了串并联与系统管路、经济性(包括节能)有关.并以此给出了正确考虑水泵选择、连接方式的原则性初步意见.     

The dimensional accuracy of preparation of femoral cavity in cementless total hip arthroplasty

Objective: To observe the accuracy of femoral preparation and the position of the cementless prosthesis in femoral cavity, and to compare the results between the computer-assisted surgical group (CASPAR) and the conventional group. Methods: Ten femoral components were implanted either manually or by CASPAR in cadaver femurs. The specimens were cut to 3 mm thick slices. Microradiograms of every slice were sent to a computer for analysis with special software (IDL). The gaps and the medullary cavities between component and bone, the direct bone contact area of the implant surface,the gap width and the percentage of gap and bone contact area were measured in every slice. Results: In the proximal implant coated with HA of the CASPAR group, the average percentage of bone contact reached 93.2% (ranging from 87.6% to 99.7%); the average gap percentage was 2.9% (ranging from 0.3% to 7.8%); the maximum gap width was 0.81 mm and the average gap width was only 0.20 mm. While in the conventional group, the average percentage of bone contact reached 60.1% (ranging from 49.2% to 70.4%); the average gap percentage was 32.8% (ranging from 25.1% to 39.9%); the maximum gap width was 2.97 mm and the average gap width was 0.77 mm. The average gap around the implant in the CASPAR group was only 9% of that in the manual group; the maximum and average gap widths were only about 26% of those in the manual group. On the other hand, the CASPAR group showed 33% higher bone contact than the manual group. Conclusion: With the use of robotics-assisted system, significant progress can be achieved for femoral preparation in total hip arthroplasty.     

Counterformal contacts of full toroidal continuously variable transmission

1 Introduction A traction drive is a device, which transmits powerby means of traction contacts among multiple rotatingbodies. Variable ratio power transmission is achievedby varying the system geometry so that the points ofaction of the traction force are varied. When this isdone in a continuous manner, it results in a conti-nuously variable traction drive varaitor. There areprimarily two types of traction drives that are ofinterest in the automotive area, viz., half toroidaltraction drive an…