360°棱镜安全监测定位精度分析及常数测定方法

360°棱镜可在水平方向测量从任何方向入射的信号,其与测量机器人组成的自动测量系统被广泛应用在工程安全监测领域。结合360°棱镜几何结构特点和性能指标,通过实验测试数据,详细分析了360°棱镜在不同偏转方向上相同的入射光线对水平角、垂直角和距离的变化规律,以及对平面和高程测量精度的影响规律,在分析360°棱镜定位精度的基础上,计算出360°棱镜常数。结果表明,360°棱镜平面点位最大偏差小于1.0 mm,点位测量中误差优于0.5 mm;高程测量值周期变化为120°,最大偏差小于2.6 mm,高程测量中误差优于2.0 mm;测定360°棱镜常数为23.1 mm。实验结果为360°棱镜的应用范围和正确使用提供了参考依据,能够更好地发挥其在工程中的作用。

Degradable magnesium alloy suture promotes fibrocartilaginous interface regeneration in a rat rotator cuff transosseous repair model

Despite transosseous rotator cuff tear repair using sutures is widely accepted for tendon-bone fixation,the fibrocartilaginous enthesis regeneration is still hardly achieved with the traditional sutures.In the present work,degradable magnesium(Mg)alloy wire was applied to suture supraspinatus tendon in a rat acute rotator cuff tear model with Vicryl Plus 4±0 absorbable suture as control.The shoulder joint humerus-supraspinatus tendon complex specimens were retrieved at 4,8,and 12 weeks after operation.The Mg alloy suture groups showed better biomechanical properties in terms of ultimate load to failure.Gross observation showed that hyperplastic response of the scar tissue at the tendon-bone interface is progressively alleviated over time in the both Mg alloy suture and Vicryl suture groups.In the histological analysis,for Mg alloy suture groups,chondrocytes appear to proliferate at 4 weeks postoperatively,and the tendon-bone interface showed an orderly structural transition zone at 8 weeks postoperatively.The collagenous fiber tended to be aligned and the tendon-bone interlocking structures apparently formed,where transitional structure from unmineralized fibrocartilage to mineralized fibrocartilage was closer to the native fibrocartilaginous enthesis.In vivo degradation of the magnesium alloy wire was completed within 12 weeks.The results indicated that Mg alloy wire was promising as degradable suture with the potential to promotes fibrocartilaginous interface regeneration in rotator cuff repair.

Breaking the optical efficiency limit of virtual reality with a nonreciprocal polarization rotator

A catadioptric lens structure,also known as pancake lens,has been widely used in virtual reality(VR)displays to reduce the formfactor.However,the utilization of a half mirror(HM)to fold the optical path thrice leads to a significant optical loss.The theoretical maximum optical efficiency is merely 25%.To transcend this optical efficiency constraint while retaining the foldable characteristic inherent to traditional pancake optics,in this paper,we propose a theoretically lossless folded optical system to replace the HM with a nonreciprocal polarization rotator.In our feasibility demonstration experiment,we used a commercial Faraday rotator(FR)and reflective polarizers to replace the lossy HM.The theoretically predicted 100%efficiency can be achieved approximately by using two high-extinction-ratio reflective polarizers.In addition,we evaluated the ghost images using a micro-OLED panel in our imaging system.Indeed,the ghost images can be suppressed to undetectable level if the optics are with antireflection coating.Our novel pancake optical system holds great potential for revolutionizing next-generation VR displays with lightweight,compact formfactor,and low power consumption.

Application of multidisciplinary team-based integrated traditional Chinese medicine and Western medicine in rotator cuff injury patients undergoing arthroscopic surgery

BACKGROUND Arthroscopic rotator cuff repair is a common surgical treatment for rotator cuff injuries(RCIs).Although this procedure has certain clinical advantages,it requires rehabilitation management interventions to ensure therapeutic efficacy.AIM To investigate the effect of integrated traditional Chinese medicine and Western medicine(TCM-WM)under the multidisciplinary team(MDT)model on the postoperative recovery of patients undergoing arthroscopic surgery for RCIs.METHODS This study enrolled 100 patients who underwent arthroscopic rotator cuff repair for RCIs at the Seventh People’s Hospital of Shanghai University of Traditional Chinese Medicine between June 2021 and May 2024.They were divided into a control group(n=48)that received routine rehabilitation treatment and an experimental group(n=52)that received TCM-WM under the MDT model(e.g.,acupuncture,TCM traumatology and orthopedics,and rehabilitation).The results of the Constant–Murley Shoulder Score(CMS),Visual Analogue Scale(VAS),Shoulder Pain and Disability Index(SPADI),muscular strength evaluation,and shoulder range of motion(ROM)assessments were analyzed.RESULTS After treatment,the experimental group showed significantly higher CMS scores in terms of pain,functional activity,shoulder joint mobility,and muscular strength than the baseline and those of the control group.The experimental group also exhibited significantly lower VAS and SPADI scores than the baseline and those of the control group.In addition,the experimental group showed significantly enhanced muscular strength(forward flexor and external and internal rotator muscles)and shoulder ROM(forward flexion,abduction,and lateral abduction)after treatment compared with the control group.CONCLUSION TCM-WM under the MDT model improved shoulder joint function,relieved postoperative pain,promoted postoperative functional recovery,and facilitated the recovery of muscular strength and shoulder ROM in patients with RCIs who underwent arthroscopic rotator cuff repair.

Effect of electroacupuncture combined with rehabilitation techniques on shoulder function in patients with rotator cuff injuries

BACKGROUND The rotator cuff is located below the acromion and deltoid muscles and comprises multiple tendons that wrap around the humeral head,maintaining shoulder joint stability.AIM To explore the effect of electroacupuncture combined with rehabilitation techniques on shoulder function in patients with rotator cuff injuries.METHODS We selected 97 patients with rotator cuff injuries treated in the People's Hospital of Yuhuan from February 2020 to May 2023.Patients were grouped using the envelope method.RESULTS After treatment,the study group’s treatment effective rate was 94.90%(46/49 patients),significantly higher than that in the control group(79.17%,38/48 cases;P<0.05).Before treatment,there was no difference in Constant Murley Score(CMS)scores,shoulder mobility,or 36-Item Short Form Health Survey(SF-36)scale scores(P>0.05).Compared with those before treatment,the CMS scores(including pain,daily living ability,shoulder mobility,and muscle strength),all aspects of shoulder mobility(forward flexion,posterior extension,external rotation,internal rotation),and SF-36 scale scores(including physiological,psychological,emotional,physical,vitality,and health status)were higher in both groups after treatment and significantly higher in the study group(P<0.05).There was no difference in the occurrence of complications between the two treatment groups(P>0.05).CONCLUSION Electroacupuncture combined with rehabilitation techniques has a good treatment effect on patients with rotator cuff injuries,helps accelerate the recovery of shoulder function,improves the quality of life,and is highly safe.

镜下360°松解术结合活血通络法治疗瘀滞型顽固性冻结肩临床疗效

目的:探讨镜下360°松解术结合活血通络法治疗瘀滞型顽固性冻结肩临床疗效。方法:选取2021年12月—2022年12月南昌市洪都中医院收治的24例顽固性冻结肩患者为研究对象,随机平均分为观察组及对照组,各12例,均采用关节镜下360°松解术进行治疗。术后观察组予以双合汤加减治疗,对照组采用关节腔注射“三联针”(玻璃酸钠注射液、注射用甲磺酸罗哌卡因及复方倍他米松)治疗。于术前,术后6周、3及6个月进行视觉模拟评分法(VAS)评分、美国肩肘外科医师协会(ASES)评分及末次随访时采用临床疗效评定标准评价2组临床疗效。结果:组内比较,2组术后6周、3及6个月VAS评分均明显低于术前,且术后各时间点比较呈依次递减趋势,ASES评分均高于术前,且术后各时间点比较呈依次递增趋势,差异有统计学意义(P<0.05)。组间比较,观察组术后6周、3及6个月VAS、ASES评分均优于对照组,差异有统计学意义(P<0.05)。在末次随访中,2组患者总有效率均达到100%,但观察组愈显率为91.67%,明显高于对照组的50.00%,差异有统计学意义(P<0.05)。结论:镜下360°松解术结合活血通络法治疗瘀滞型顽固性冻结肩,能够很好地改善肩关节功能,取得了良好临床疗效。

Ultrasound of the Rotator Cuff in Non-Fractured Shoulder Trauma: 30 Cases at the Yalgado Ouedraogo University Hospital of Ouagadougou (Burkina Faso)

Introduction: Ultrasound is the imaging technique of choice for the study of rotator cuff lesions. However, in the case of shoulder trauma, it is rarely requested in our context. This study aimed to show ultrasound lesions of the rotator cuff in cases of non-fracture shoulder trauma at the CHUYO in Ouagadougou. Methodology: This was a prospective descriptive cross-sectional study running from August 1 to November 30, 2017, in the medical imaging department of CHUYO. The study population consisted of patients received in the department for ultrasound in the context of non-fracture shoulder trauma. Results: We collected 20 cases (66.67%) of rotator cuff lesions out of 30 non-fracture shoulder injuries. The mean age of the patients was 27.6 years. Road traffic accidents accounted for 60% of injuries, sports accidents for 30%, and domestic accidents for 10%. Ultrasound lesions were mainly tendon ruptures (36.67%) and tendinitis (23.33%). Ruptures were non-transfixing in 90.90% of cases. The supraspinatus was the most affected (81.81%). Conclusion: Ultrasound can help diagnose rotator cuff injuries, particularly in non-fractured shoulder trauma.

Advances in 3D correction of adolescent scoliosis:The superiority of scoliocorrector fatma-UI in rotational realignment

This letter compares the clinical efficacy and economic feasibility of the scoliocorrector fatma-UI(SCFUI)with direct vertebral rotation(DVR)in treating adolescent idiopathic scoliosis(AIS).SCFUI has shown promising results in threedimensional spinal correction,providing superior rotational alignment compared to DVR and achieving significant improvements in coronal and sagittal planes.Additionally,SCFUI’s advanced design reduces risks associated with AIS surgeries and enhances overall patient outcomes.Economic analysis reveals SCFUI as a cost-effective option,potentially lowering long-term healthcare costs by minimizing complications and revisions.Our findings suggest that SCFUI is a viable,innovative approach in AIS treatment,meeting clinical and economic demands in orthopedic care.

360度评估在某三甲妇幼保健院妇产科专业住培管理中的应用

目的 为了解住院医师和带教老师在培训中存在的问题,加强住培过程管理,提升培训质量。方法 在某省妇幼保健院妇产科住培专业基地组织360度评估,共有住院医师636人次、带教老师602人次和护理人员361人次完成评估。结果 评估问卷信度效度评价指标均在0.95以上,具有较高的可靠性。带教老师对住院医师的评估结果提示,被评估住院医师在职业精神[(4.7±0.5)分]、患者照护[(4.6±0.6)分]和沟通合作[(4.6±0.7)分]维度获得较高得分,在知识技能[(4.2±0.8)分]和教学能力[(4.1±0.8)分]维度得分较低。对评估分数进行单因素分析,带教老师对住院医师的评估中,高年级得分高于低年级(F=4.29,P<0.05),但不同年级住院医师对带教老师的评估差异无统计学意义(F=0.098,P> 0.05),不同护理人员对住院医师的评估差异无统计学意义(F=0.151,P>0.05)。在三类评估中,对带教老师评估的平均得分虽然最高[(96.5±8.3)分],但主观反馈中,住院医师给带教老师提出教学时间不够,教学意识不强等具体建议。结论 应用360度评估工具,有利于师生发现问题、解决问题,也为专业基地制定培养计划和规范过程管理提供参考依据。

基于患者360视图的护理不良事件管理系统构建与应用

目的构建基于患者360视图的护理不良事件管理系统,优化护理不良事件管理流程。方法护理不良事件管理系统包含可视化安全预警、向导式上报及反馈追踪、分层系统培训3个功能模块,于2021年1月正式应用。结果系统应用后,压力性损伤、给药错误以及不良事件整体发生率均较应用前下降,其中给药错误发生率差异具有统计学意义(P<0.05),而管路滑脱、跌倒/坠床的发生率较应用前略有增加;护理不良事件整改达标率由92.8%提高至95.7%(P<0.05);组织科护士长培训12次,组织全院护士长专项培训20余次,开展护理质量安全管理标准化操作规程工作坊12场次。结论基于患者360视图的护理不良事件管理系统可以提高护理风险识别率,降低护理不良事件发生率。下一步需在充分考虑患者特点与需求的基础上进一步优化系统功能。

放射科住院医师规范化培训师资队伍现状及360度评估应用的探索

住院医师规范化培训(简称住培)师资队伍的质量及水平是影响培训效果的关键因素,放射科作为住培专业基地及临床辅助轮转学科,其师资队伍管理及带教规范执行情况对提高临床各专业住培质量具有重要影响。该文基于上海交通大学医学院附属新华医院放射科专业基地目前师资队伍现状,结合国家住培制度,应用其自主设计的线上360度师资评估法,进行同行医师,上、下级医师,医技护理,住院医师互评及自评等多维度师资评估的实践探索,旨在规范放射科师资队伍管理,提升师资队伍带教水平与能力,保证住培教学质量。

30m望远镜的三镜Rotator组件轴承概念设计

针对美国30m望远镜(TMT)三镜系统在工作时的特殊要求,对三镜系统的Rotator组件轴承进行了设计,提出了在载荷连续变化条件下轴系的设计方法。通过分析该系统独特的运动和受力方式并对比现有大型望远镜结构形式,确定了三排滚柱支撑的轴系方案及轴承结构参数。计算中将天顶角定义为变量,确定了轴承的最恶劣工况及此时的望远镜指向。采用了数值计算和有限元仿真的方法对这一条件下的轴承变形和应力同时进行校核,两种方法得到的结果符合得很好,证明了模型的正确性。结果表明,天顶角为0°～65°时,轴承在x、y、z方向上的变形不超过0.015mm,轴承倾角不超过1.7×10-5 rad,满足设计要求,并留有很大裕度。

面向360度全景图像显著目标检测的相邻协调网络

为解决360°全景图像显著目标检测(SOD)中的显著目标尺度变化和边缘不连续、易模糊的问题,该文提出一种基于相邻协调网络的360°全景图像显著目标检测方法(ACoNet)。首先,利用相邻细节融合模块获取相邻特征中的细节和边缘信息,以促进显著目标的精确定位。其次,使用语义引导特征聚合模块来聚合浅层特征和深层特征之间不同尺度上的语义特征信息,并抑制浅层特征传递的噪声,缓解解码阶段显著目标与背景区域不连续、边界易模糊的问题。同时构建多尺度语义融合子模块扩大不同卷积层的多尺度感受野,实现精确训练显著目标边界的效果。在2个公开的数据集上进行的大量实验结果表明,相比于其他13种先进方法,所提方法在6个客观评价指标上均有明显的提升,同时主观可视化检测的显著图边缘轮廓性更好,空间结构细节信息更清晰。

以学生为视角的360度跨境电商在线教学反馈评价研究——以《选品管理》课程为例

360度跨境电商在线教学反馈评价以学生为中心展开。基于学生视角,从自我评价、团队评价、平台评价、环境评价等维度展开调查研究,通过数据分析,评价在线教学效果,为优化跨境电商在线教学提供决策依据。

面向360°全景视频的帧内预测编码的快速算法

为了节省360°全景视频的编码时间,对通用视频编码标准中的编码单元划分决策过程进行了研究,提出了一种面向360°全景视频的帧内预测编码的快速算法。通过优化编码树单元(Coding Tree Unit,CTU)的编码深度范围和编码单元的划分模式的选择过程,减少编码时间。实验结果表明,在全帧内模式下,所提算法比原始算法平均可以节省34.33%的时间复杂度,同时带来的BDBR平均增量仅为1.665%,BDPSNR的平均降低量仅为0.076 dB。

Factors affecting healing after arthroscopic rotator cuff repair

Rotator cuff repair has been shown to have good longterm results. Unfortunately, a significant proportion of repairs still fail to heal. Many factors, both patient and surgeon related, can influence healing after repair. Older age, larger tear size, worse muscle quality, greater muscle-tendon unit retraction, smoking, osteoporosis, diabetes and hypercholesterolemia have all shown to negatively influence tendon healing. Surgeon related factors that can influence healing include repair construct-single vs double row, rehabilitation, and biologics including platelet rich plasma and mesenchymalstem cells. Double-row repairs are biomechanically stronger and have better healing rates compared with single-row repairs although clinical outcomes are equivalent between both constructs. Slower, less aggressive rehabilitation programs have demonstrated improved healing with no negative effect on final range of motion and are therefore recommended after repair of most full thickness tears. Additionally no definitive evidence supports the use of platelet rich plasma or mesenchymal stem cells regarding improvement of healing rates and clinical outcomes. Further research is needed to identify effective biologically directed augmentations that will improve healing rates and clinical outcomes after rotator cuff repair.

非物质视域下无锡“锡绣”艺术在360°数码印花服饰中的应用研究

无锡“锡绣”作为一种重要的文化遗产,蕴含丰富的历史和文化内涵。本文以“锡绣”纹样为研究对象,探析其文化传承、艺术审美及市场应用方面的多重价值,为360°数码印花服饰的创新设计提供思路。通过结合具体的服饰设计实践案例,从图案组合、色彩搭配、材料运用3个方面,探讨无锡“锡绣”艺术在360°数码印花服饰中的应用,旨在通过现代科技手段焕发“锡绣”在当代社会的新生机,进一步推动其传承与发展。

Stem cell therapy in the management of shoulder rotator cuff disorders

Rotator cuff tears are frequent shoulder problems that are usually dealt with surgical repair. Despite improved surgical techniques, the tendon-to-bone healing rate is unsatisfactory due to difficulties in restoring the delicate transitional tissue between bone and tendon. It is essential to understand the molecular mechanisms that determine this failure. The study of the molecular environment during embryogenesis and during normal healing after injury is key in devising strategies to get a successful repair. Mesenchymal stem cells(MSC) can differentiate into different mesodermal tissues and have a strong paracrine, anti-inflammatory, immunoregulatory and angiogenic potential. Stem cell therapy is thus a potentially effective therapy to enhance rotator cuff healing. Promising results have been reported with the use of autologous MSC of different origins in animal studies: they have shown to have better healing properties, increasing the amount of fibrocartilage formation and improving the orientation of fibrocartilage fibers with less immunologic response and reduced lymphocyte infiltration. All these changes lead to an increase in biomechanical strength. However, animal research is still inconclusive and more experimental studies are needed before human application. Future directions include expanded stem cell therapy in combination with growth factors or different scaffolds as well as new stem cell types and gene therapy.

Functional outcomes of traumatic and non-traumatic rotator cuff tears after arthroscopic repair

AIM To compare the functional outcomes of traumatic and non-traumatic rotator cuff tears after arthroscopic repair. METHODS Eighty-seven patients with rotator cuff tears following arthroscopic treatment were divided into traumatic and non-traumatic tear groups. Postoperative muscle strength and outcomes using the modified University of California, Los Angeles score were evaluated. Sex, age, affected limb and dominant limb were correlated between groups. Muscle strength of the repaired and unaffected shoulders was compared. Rotator cuff injury size was measured. RESULTS Of the 87 patients who underwent rotator cuff repairs, 35 had traumatic tears and 52 had non-traumatic tears. In patients with non-traumatic tears, the average age was 59 years, 74.5% were female, 96.1% were righthand dominant and 92.3% had their dominant shoulder affected. Patients with traumatic tears were 59.5 yearsold on average, 51.4% were female, 91.4% were righthand dominant and 88.5% had their dominant shoulder affected. No difference existed in the mean modified University of California, Los Angeles score between patients with traumatic tears(33.7) compared with those with non-traumatic tears(32.8). No strength differences were observed between groups: The strength difference between the non-affected and affected sides was 1.21 kg in the non-traumatic group and 1.39 kg in the traumatic group(P = 0.576), while the strength ratio between the non-affected/affected sides was 0.805 in the nontraumatic group and 0.729 in the traumatic group(P = 0.224). CONCLUSION The functional results of traumatic rotator cuff repairs are similar to non-traumatic tears. Both outcomes are satisfactory.

Arthroscopic treatment options for irreparable rotator cuff tears of the shoulder

The management of patients with irreparable rotator cuff tears remains a challenge for orthopaedic surgeons with the final treatment option in many algorithms being either a reverse shoulder arthroplasty or a tendon transfer. The long term results of these procedures are however still widely debated, especially in younger patients. A variety of arthroscopic treatment options have been proposed for patients with an irreparable rotator cuff tear without the presence of arthritis of the glenohumeral joint. These include a simple debridement with or without a biceps tenotomy, partial rotator cuff repair with or without an interval slide, tuberplasty, graft interposition of the rotator cuff, suprascapular nerve ablation, superior capsule reconstruction and insertion of a biodegradable spacer(Inspace) to depress the humeral head. These options should be considered as part of the treatment algorithm in patients with an irreparable rotator cuff and could be used as either as an interim procedure, delaying the need for more invasive surgery in the physiologically young and active, or as potential definitive procedures in the medically unfit.The aim of this review is to highlight and summarise arthroscopic procedures and the results thereof currently utilised in the management of these challenging patients.