Psychosocial Aspects of Male Infertility at the Service of Urology-Andrology of the Hospital of the Sino-Guinean Friendship

Objective: Describe the psychosocial aspects of male infertility at the hospital of the Sino-Guinean Friendship. Patients and method: It is a prospective study of a descriptive type covering a period of 6 months. The study covered 17 patients, all received for a desire to conceive after at least one year of regular sexual intercourse without contraception. The data were collected from patient interviews using a pre-established questionnaire. Results: The average age of the patients was 32.07 years with extremes of 23 years and 42 years. During this study, 64.70% of patients were no longer participating in community ceremonies. The patients’ relationships with their spouse and family deteriorated in 52.94% and 47.06%, respectively. Conversely, relations with the family of origin remained unchanged in 70.59 percent of cases. The reduction in economic activity was by 13 patients (76.48%). Conclusion: Male infertility causes a real psychic earthquake in men with its corollaries of negative feelings. The rather complex moral repercussions of male infertility affect not only the individual, his/her partner, and family, but also economic activity.

Clandestine Abortions and Its Complications at the University Hospital Center of the Sino-Central African Friendship

Introduction: In developed countries in general and particularly in the Central African Republic, clandestine abortions constitute a real health problem. The aim of our work was to study the method of carrying out clandestine abortions, to describe the profile of the providers and the complications that result from it. Patients and Methods: This was a descriptive cross-sectional study of patients hospitalized at the University Hospital Center for Sino-Central African Friendship (CHUASC) from 2015 to 2019 on 236 cases. Results: We identified a total of 254 patients for 8039 live births in the same period, a frequency of 3.16%. The age of the patients was between 15 years old and 48 years old with an average of 25 years old. Singles accounted for 42.5%. Induced abortions were more performed among students (32.6%) and the unemployed 53.6%. Contraception was used in 11.5% of cases. The methods used were numerous: misoprostol (32%), the traditional method (18%), the mechanical method (50%). In this method, we note the dilation of the cervix by the cassava stem;Hegar’s candles;the probes, which are infusion tubes cut and introduced into the cervix, of which 2 cases had escaped at the level of the uterine muscles and emerged under the skin at the pubis part two years later. The practice of induced abortions in our series was done by medical students in 37.3% followed by unqualified staff in 49.7%. It took place either at home or in centers managed by Non-Governmental Organizations. The aseptic conditions were not perfect. Some patients (43.2%) were aware of the ensuing complications. All complications were present: hemorrhage (60.7%), pelviperitonitis (23.6%), uterine perforation (6.6%), peritonitis (2.8%) and death (2%) related to sepsis. Conclusion: Clandestine abortion remains a real health problem for young Central African women.

Management of Immediate Postpartum Hemorrhage at the University Hospital Center of the Sino-Central African Friendship

Introduction: Immediate postpartum hemorrhages constitute a frequent maternal complication and remain at the forefront of maternal death in our countries. Objective: Contribute to improving the management of immediate postpartum hemorrhage in our context with a view to reducing maternal mortality. Patients and Methods: We conducted a retrospective descriptive and analytical study over a period of 12 months from January 1st to December 31st 2020. Results: We collected a total of 109 files on a total of 4360 deliveries. The frequency of postpartum haemorrhages was of the order of 2.5%. The most represented age group was between 20 and 24 years old. Pauciparas represented the majority of our study population. 64.5% of patients were uneducated. These hemorrhages occurred in patients who often gave birth outside the department with 63.8%. The main causes of postpartum hemorrhage were cervical tears (51.2%) and partial placental retention (30.7%). The majority of these deliveries (48.8%) were carried out by midwives followed by assistant midwives (33.2%). Active management of the third period of delivery was systematic and immediate followed by the valve examination completed by the infusion of oxytocin in case of uterine atony, tranexamic acid ans misoprostol intrarectally. In the event of persistent hemorrhage, suture of the cervical lesions, ligation of the cervical vessels or even laparotomy either for the selective ligation of the blood vessels or for the hysterectomy for hemostasis were practiced. We do not have a Nalador, nor a Bakry balloon, nor an Interventional Radiology service for embolization of the uterine arteries. We deplore 1.3% of deaths from afibrinogenemia. Conclusion: The frequency of immediate postpartum hemorrhages is lower in our health facility. This is due to the rapid handling of cases. Improving the quality of services offered to women during childbirth can further help reduce the frequency of these hemorrhages.

Magnetic Fluctuation Measurement in Sino United Spherical Tokamak Plasma

To investigate the magnetic fluctuations and for further transport study, the poloidal and radial magnetic field t is conducted on the Sino United Spherical Tokamak （SUNIST）. Auto-power spectral density indicares that the magnetic fiuctuation energy mainly concentrates in the frequency region lower than lO kttz. The magnetic field oscillations, which are characterized by harmonic frequencies of 40 kHz, are observed in the scrape- off layer; by contrast, in the plasma core, the magnetic fluctuations are of Gaussian type. The time-frequency profiles show that the poloidal magnetic fluctuations are temporally intermittent. The autocorrelation calculation indicates that the fluctuations in decorrelation time vary between the core and the edge.

Pyeloplasty According to Küss-Anderson-Hynes: Results and Complications at the Urology-Andrology Department of the Sino-Guinean Friendship Hospital

Objective: Evaluate pyeloplasty according to Küss-Anderson-Hynes at the urology-andrology department of the Sino-Guinean Friendship Hospital. Patient and Method: This is a 3-year prospective descriptive study from January 1, 2018 to December 31, 2020. It focused on a sample of 21 patients, who had undergone pyeloplasty according to Küss-Anderson-Hynes. Results: The averages age of the patients was 24.24 years. Lumbar pain was the main reason for consultation in 71.43% of cases. pyeloplasty according to Küss-Anderson-Hynes alone was performed in 76.20% of cases. It was associated with lower pole vessel uncrossing in 14.29% of cases and in 9.52% of cases with pyelolithotomy. The main Postoperative complications consisted of surgical site infections (23.81%) and fistula of the pyelo-ureteral junction (9.52%). The result of the pyeloplasty evaluated after three years, was qualified as good in 13 patients (86.67%), conversely the result was declared bad in 2 patients or 13.33%. During the follow-up period, postoperatively, we had lost sight of 6 patients. Conclusion: Pyeloplasty according to Küss-Anderson-Hynes in addition to its excellent results reported by the literature was the only therapeutic alternative performed during this study. However, its indications are considerably reduced with the advancement of laparoscopy.

不同苜蓿品种叶片特征、光合生理特性与产量性状的比较

以国内外引进的8个紫花苜蓿(Medicago sativa L.)品种为试验材料,对比研究不同品种的叶片特征、产量性状和光合生理特性,采用相关性分析和通径分析法,探讨其与产量的关联性,以期为高产紫花苜蓿种质的筛选提供依据。结果表明:供试紫花苜蓿品种单株干重的变幅为0.88~1.21 g;各性状与单株干重的相关性按大小排序依次为:单株叶干重>比叶重>蒸腾速率>单株叶片数>叶形指数,单株叶干重是最突出的叶片特征指标。对单株干重的影响程度从大到小依次为:比叶重>气孔导度>可溶性蛋白>株高>蔗糖>可溶性糖>叶绿素总量,其中,比叶重是单株干重的主要决定因子。综上,高产紫花苜蓿种质筛选的重要指标包括:单株叶干重和比叶重,8个紫花苜蓿品种中‘甘农9号’、‘WL319HQ’和‘SG501’的单株干重、单株叶干重和比叶重均较大,可作为高产种质在育种工作中加以研究利用。

磷矿粉在石灰性土壤中对紫花苜蓿的施用效果

磷矿粉是一种难溶性磷肥,一般认为其在石灰性土壤上施用效果不好。苜蓿(Medicago sativa)利用难溶性磷的能力较强,为探索磷矿粉在石灰性土壤对苜蓿的施用效果,本研究以3种不同品位磷矿粉PRⅠ、PRⅡ、PRⅢ为磷肥源,以水溶性磷肥过磷酸钙为对照(CK),对3个紫花苜蓿品种‘阿尔冈金’(M1)、‘陇东苜蓿’(M2)、‘金皇后’(M3)进行土培盆栽试验,研究了不同磷矿粉处理下紫花苜蓿两茬的生长、营养品质、磷素的吸收利用以及土壤磷素含量。结果表明,第2茬收获时PRⅠ处理下M1和M3的株高明显高于CK,PRⅢ处理下M2的株高明显高于CK。M1两茬干重均表现出PRⅠ磷矿粉处理最高,两茬总生物量干重达到8.61 g,比CK高46.9%,3个磷矿粉处理下M2第1茬、第2茬和总生物量干重均高于CK,磷矿粉处理对M3的生物量没有明显作用。PRⅠ和PRⅢ处理显著提高了第2茬M1的粗蛋白含量,PRⅢ处理M1和M2紫花苜蓿的粗脂肪含量均高于CK。第1茬磷矿粉处理中PRⅡM3处理的钙含量达到最高值,为2.18%,与CKM3处理差异不显著(P>0.05),第2茬PRⅠM1和PRⅢM2处理的钙含量最高,均为1.56%。PRⅠ和PRⅢ处理可显著提高第2茬M1和M2的磷吸收效率,PRⅠ能显著提高第1茬M1和M2的磷利用效率,而PRⅡ均显著提高了3个紫花苜蓿品种第2茬的磷利用效率。除PRⅡM1处理外,磷矿粉处理均显著提高了土壤全磷含量,且3个品种均表现出在PRⅠ和PRⅢ处理下的土壤全磷含量高于PRⅡ,相比施肥前,磷矿粉处理均显著提高了土壤有效磷含量,M3的土壤的有效磷含量低于M1和M2。因此,磷矿粉在石灰性土壤对紫花苜蓿的生长、营养品质和磷素吸收利用可超过或达到与过磷酸钙相当的水平,其效果因磷矿粉品位和苜蓿品种不同而有差异,本研究条件下,PRⅠ磷矿粉,M1和M2品种表现出较好的施用效果。

中国古代剑文化演变特征研究——基于《古今刀剑录》与《名剑记》的文献比较

通过对陶弘景《古今刀剑录》和李承勋《名剑记》的文本细读和历史背景分析,考察了两书在内容选择、视角取向等方面的异同,并研析各自的时代语境进行诠释,以此反映中国古代不同时期的剑文化演变特征。研究发现,《古今刀剑录》着重于冶炼技术,反映个人经历;而《名剑记》则侧重记录历史文化,体现士人尚武精神。两书均反映其对应时代的社会文化特征。研究旨在通过古代刀剑文化研究加深对中华文明历史积淀的认识,并激励当代社会传承并创新宝贵历史文化遗产。

护理本科生临床实习带教管理与思考——从师生双向调查结果看护理本科生临床实习带教

目的:探讨护理本科生临床实习中的管理问题。方法:以问卷星方式对护理本科生实习目标、师生相互期望和带教中的问题及困难进行双向调查。结果:带教老师最关注的是护生的实习态度和沟通能力;护生对老师的期望是通情理、有耐心、有责任心,其次是较强的专业知识;带教老师面临的最大困难是学生的实习态度问题。结论:(1)院校之间对护理本科生临床实习目标沟通较少,是影响护生实习态度的主要因素。(2)临床带教老师对老师角色认知不足,激励管理欠缺是影响教学态度的主要因素。(3)加强护理本科生临床带教管理,尤其是临床老师角色的强化和带教模式的改变是提高临床护理教学质量的根本途径。

植物种质资源引进风险分析方法概述

种质资源作为生物资源的重要组成部分,是培育作物优质、高产、抗病(虫)、抗逆新品种的物质基础。近年来,为满足我国种业飞速发展的需要,我国不断从国外引入大量的种质资源,种质资源相比其他植物产品携带有害生物的风险更高。种质资源引进过程中不可避免地携带有害生物,可能会带来严重危害。目前,美国、澳大利亚等国家已制定了关于种质资源的风险分析方法,但我国缺少针对种质资源有害生物统一的风险分析方法。本文分析了国际植物检疫措施标准、主要的贸易国家及我国有害生物风险分析标准方法的主要内容,针对引进种质资源过程中亟需解决的有害生物风险分析问题开展讨论,并对种质资源有害生物风险分析系统其未来展开工作提出以下建议:设置符合种质资源风险分析特性的指标;采用半定量风险评估方法对种质资源进行风险分析;根据不断的学习和实际工作的需要,对风险评估指标体系进行验证和适当修改。

新工科视域下应用型高校人才培养模式构建研究

新工科改革的核心之一体现为对人才培养模式探索。基于人才培养模式的三要素——人才培养目标、人才培养过程以及人才培养质量评价,深入探讨了新工科视域下应用型高校人才培养模式构建的内涵。具体为,人才培养目标指向现场工程师,规格上强调应用型、复合型和创新型;人才培养过程中,专业设置强调跨学科、课程建设呈现全方位、师资队伍建设注重结构化、产教融合体现系统化;人才培养质量评价上,要将全过程质量监控和对学生学习结果的评价相结合。

转型视域下应用型高校学报的内涵建设及影响力提升途径

地方高校向应用型高校转型带动了学报的转型。在此背景下应用型高校学报需开启新的内涵建设。为此应用型高校学报应突破综合性和内向性,突出专业性和外向性;发挥科技期刊的功能,丰富自身内涵。针对目前面临的办刊模式单一封闭、同质化严重、质量不高等问题,应用型高校学报应立足于本校的学科优势和所在区域的优势,重新定位办刊目标、学术侧重点以及服务对象,以提升办刊水平和影响力。

基于YOLOv5s和超声图像的儿童肠套叠特征检测模型

为帮助医生快速寻找到儿童腹部超声中肠套叠的病变特征并实现肠套叠超声诊后数据的快速质检,文章将目标检测算法应用于儿童腹部超声图像检测肠套叠“同心圆”征.首先探索了基于YOLOv5s的儿童肠套叠检测模型,发现该模型检测肠套叠“同心圆”征的精确度、召回率、F 1分数、mAP@0.5、FPS以及参数量等方面均优于Faster RCNN.进一步,为解决肉眼难以观察的“同心圆”征的检测问题,使用双向特征金字塔网络,并将注意力机制加入YOLOv5s网络,形成基于YOLOv5s_BiFPN_SE框架的儿童肠套叠“同心圆”征检测模型.该模型检测的精确率、召回率、F 1分数、mAP@0.5分别达到了91.33%、90.73%、91.03%、88.77%,性能更优于YOLOv5s.

无人机可见光遥感影像地物目标提取技术研究

无人机可见光遥感影像中地物目标边界清晰度较低,容易导致地物目标与背景之间的区分度降低,进而难以提取地物目标;为此,提出无人机可见光遥感影像地物目标提取方法;从光谱特征、纹理特征和边缘特征3个方面分析无人机可见光遥感影像特征;结合3种影像特征对无人机可见光遥感影像数据集实行增广处理;对完成增广后的数据集定义影像编码标签,以此确定地物目标增强权重,通过参量化处理地物目标光谱特征,计算光谱吸收指数,获取地物目标提取表达式,从而实现无人机可见光遥感影像地物目标提取;实验结果表明,所提方法能够保证地物目标边界的清晰度,具有较强的地物目标提取能力。

富硒海鲜菇菌丝体固体发酵的工艺优化

为提高海鲜菇菌粉中多糖及其中硒的含量,对海鲜菇菌丝体富硒固体发酵进行了研究和工艺条件的优化。在确定海鲜菇菌丝体耐受亚硒酸钠浓度范围的基础上,以多糖得率、多糖硒含量和长势评分为指标,考察了亚硒酸钠浓度、富硒菌液添加量和接种量对海鲜菇菌丝体富硒固体发酵的影响,最后采用响应面法优化得到固体发酵的条件。结果表明,海鲜菇菌丝体在0~100 mg·L^(-1)亚硒酸钠浓度范围内可正常生长;最佳发酵条件为亚硒酸钠浓度29 mg·L^(-1)、富硒菌液添加量45%、接种量15%,在此发酵条件下,菌丝体中多糖得率和多糖硒含量分别为(22.90±1.62)%和(316.37±1.85) mg·kg^(-1)。该发酵方法切实可行,富硒效果显著,可为菌丝体富硒发酵提供一定的参考价值。

利用激光点云的智能网联汽车自主换道横向避障

通过智能网联汽车自主换道横向避障设计,提高车辆自主驾驶安全性能,提出基于激光点云的智能网联汽车自主换道横向避障方法,构建基于全激光雷达的无人驾驶系统的汽车行驶环境激光点云数据采集模型,通过激光雷达激光点云图像检测方法实现对智能网汽车行驶环境感知。结合障碍物检测、车道线检测、可行驶区域检测的方法,分析智能网联下汽车换道障碍物和车道的相关性特征量,通过激光点云的自主寻优方法寻找边界点直到搜索路径达到阈值,再结合直线道路模型和车道线连续性原则实现对汽车自主换道横向避障规划设计。仿真结果表明,采用该方法进行汽车自主环控避障,在5 s时达到收敛状态,障碍物坐标识别误差距离低于0.7,并且该方法的识别精度达到了0.970以上,提高了车道信息的感知能力,准确高效地估计可行驶区域,提高车辆避障能力。

植物遗传转化中体细胞再生的分子机制及应用研究进展

植物遗传转化是转基因技术及以此为基础的基因组编辑、功能基因组学研究和分子育种的关键。其中,物种和基因型差异往往是限制遗传转化效率和基因编辑技术广泛应用的主要瓶颈。随着再生芽发生和体胚发生的分子机制被逐渐探明,在愈伤组织形成、增殖和再生过程中涉及生长素和细胞分裂素合成、响应和信号转导的生长及发育调节基因被用于提高遗传转化效率。本研究首先综述了植物遗传转化过程中体细胞再生的不同途径和方式,以及转化细胞以间接的器官发生方式和体胚发生方式再生的分子机制。然后重点讨论了与生长素和细胞分裂素有关的再生促进基因在提高再生效率,缩短转化时间,以及实现执拗型物种和基因型的遗传转化等方面的应用。最后总结了再生促进基因在转基因和基因编辑中的应用潜力和研究方向。

基于拉格朗日方程的航空柱塞泵动力学分析

提出了一种基于拉格朗日方程的恒压变量航空柱塞泵主轴和斜盘耳轴驱动力矩分析方法。针对柱塞泵主轴和斜盘耳轴旋转2个运动自由度,不考虑柱塞/转子、柱塞/滑靴、滑靴/斜盘、转子/主轴4对刚体约束副之间的约束力,建立了斜盘和主轴的动力学分析方程组。航空柱塞泵通常设计为具有斜盘偏心距和交错角的特殊结构。在运动学特性分析基础上,对主轴和斜盘耳轴驱动转矩进行了计算,并分析了斜盘交错角和偏心距对斜盘驱动力矩的影响。最后,通过对比理论方法和试验结果,证明了所提方法的准确性和有效性。与传统力学分析的解析方法及基于仿真模型的仿真方法相比,拉格朗日方法快捷、高效、结果准确,可用于航空柱塞泵的脉动、振动、寿命分析以及故障诊断和质量状态评估。

氧化时间对微弧氧化非均质陶瓷膜工频击穿特性的影响

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药学教育实践教学形成性评价有效性探索

重视实践教学和应用型人才培养质量是高等药学教育的发展规律。有效、科学的形成性评价可为药学教育实践教学学习过程提供持续动态测评与反馈,为药学教育优质人才培养提供有力保障。文章总结提升药学教育实践教学形成性评价有效性的实践路径,为构建良好的形成性评价体系和保障育人质量提供参考和研究基础。