Projectile angular-differential cross sections for single electron transfer in fast He^+-He collisions

The four-body Coulomb–Born distorted wave approximation is applied to investigate the integral as well as projectile angular-differential cross sections for single-electron capture in the collision of energetic singly positive charged helium ions with helium atoms in their ground states. The formalism satisfies the correct boundary conditions. The influence of the dynamic electron correlations on the cross sections is studied by considering the inter electronic interactions in the complete perturbation potentials in post form. Also, the sensitivity of the cross sections to the static electronic correlations is studied by using the single-zeta and the highly correlated Byron–Joachain wave functions to describe the initial bound state of the active electrons. The obtained results for the energy range of 40–5000 ke V/amu are reported and compared with other three- and four-body theoretical data and available experimental measurements. The comparison leads us to discuss the validity of the applied approach and survey the interaction effects on the cross sections by recognizing the electron–electron interaction. Particularly, for differential cross sections, the comparison of the present four-body method with the experiment shows that the agreement is not as good as that for its three-body version.

生殖支原体抗原快速检测方法的初步建立与应用

本文报告了快速检测生殖支原体（Ｍｇ）抗原的ＥＬＩＳＡ双抗夹心法的初步建立及对部分地区性病门诊就诊者Ｍｇ 感染状况的检测结果与分析。该方法具有一定的灵敏度和特异性，适用于检测泌尿生殖道标本中的Ｍｇ 抗原。用本方法检测天津和江门地区ＳＴＤ 门诊患者，Ｍｇ 抗原阳性率分别为１２％ 和１９ ％ ，提示两地性病高危人群中均存在Ｍｇ 感染。

聚变驱动次临界堆双冷嬗变包层多群中子截面数据库共振自屏效应计算与分析

依据聚变驱动次临界反应堆 (FDS I)系统设计方案 ,使用Njoy和Transx程序 ,制作了 2 5群、1 75群、62 0群忽略和考虑共振自屏效应的中子截面核数据库 ,用Anisn程序计算了系统的有效增殖系数和各种反应率。结果表明 ,共振自屏效应对FDS I系统的各种反应率有很大的影响。

分区可控挠度辊的个性化设计及结构优化

论述了分区可控挠度辊压区误差产生的原因和消除的方法,提出了分区可控挠度辊的个性化设计思想及其结构改进,并进一步论述了全幅可控挠度辊的结构优化条件,最后叙述了如何通过AutoLISP程序设计来实现对全幅可控挠度辊结构的计算机优化。

高能电子与氦原子非弹性散射研究

在高能入射电子的情况下 ,利用玻恩近似计算了氦子的激发 ( 1 S— 2 S)截面 ,得到了跃迁矩阵元的解析表达式。

Multiple Encryption-based Algorithm of Agricultural Product Trace Code

To establish a sound traceability system of agricultural products and guarantee security of agricultural products,an algorithm is proposed to encrypt trace code of agricultural products.Original trace code consists of 34 digits indicating such information as place of origin,name of product,date of production and authentication.Area code is used to indicate enterprise information,the encrypted algorithm is designed because of the increasing code length,such coding algorithms as system conversion and section division are applied for the encrypted conversion of code of origin place and production date code,moreover,section identification code and authentication code are permutated and combined to produce check code.Through the multiple encryption and code length compression,34 digits are compressed to 20 on the basis of ensuring complete coding information,shorter code length and better encryption enable the public to know information about agricultural products without consulting professional database.

The Misgav Ladach Method剖宫产术的临床比较及术后经阴道超声观察

目的 :探讨MisgavLadachMethod(MLM)剖宫产术的特点。方法 :173例符合剖宫产的孕妇 ,随机化分为实验组 (MLM剖宫产组 ) 88例 ;对照组 (传统子宫下段剖宫产组 ) 85例 ,比较两组的各项指标。结果 :实验组比对照组手术总时间、胎儿娩出时间、手术出血量均明显减少 (P <0 .0 5 ) ,术后排气、下床和拆线时间也明显提前 (P <0 .0 5 )。术后 9dTVUS测量比较子宫切口厚度、宫腔前后径 ,前者也明显减少 (P <0 .0 5 )。而膀胱子宫反折部切口血肿发生率 ,两者无明显差异 (P >0 .0 5 )。结论 :MLM术式简单 ,手术时间短 ,出血少 ,损伤轻 ,并发症低 ,康复快 ,值得临床推广。

瘢痕子宫妊娠阴道分娩的结局及临床分析

目的探讨瘢痕子宫产妇再妊娠经阴道分娩的临床安全性及分娩结局。方法选取2020年2月至2021年2月广州市花都区第二人民医院妇产科收治的60例瘢痕子宫再妊娠产妇,有30例产妇采取经阴道自然分娩,将其纳入研究组;有30例产妇采取剖宫产分娩,将其纳入对照组。分析瘢痕子宫再妊娠产妇围手术期指标及母婴结局情况。结果研究组产时出血量、产后2 h出血量均较对照组少,住院时间较对照组短(P<0.05);研究组新生儿Apgar评分较对照组高(P<0.05);研究组产后出血、子宫破裂、产褥感染总发生率较对照组低(P<0.05);两组新生儿结局比较,差异无统计学意义(P>0.05)。结论瘢痕子宫产妇再妊娠经阴道分娩具有较为理想的可行性,在明确产妇符合瘢痕子宫行阴道分娩指征后采取经阴道分娩可减少术后并发症,降低剖宫产率,安全性良好。