搜索到35429篇“ TRANSVERSE“的相关文章
智能汽车横纵向控制研究综述
2025年
智能汽车作为汽车产业和全球智能化的关键一环,在整个智能化系统中扮演着至关重要的角色。为了探索智能汽车实现自动驾驶的关键技术,研究车辆的横向和纵向控制方法,利用车辆的运动学、动力学模型及轮胎模型,分析智能车辆的横向控制和纵向控制,采取解耦策略简化控制难度,确保车辆按照预定路径安全行驶。为确保车辆在运动时的稳定性,加强对车辆纵向控制的研究,以优化汽车速度管理。研究了车辆的耦合控制,以克服车辆耦合效应带来的问题,优化横向和纵向控制的精确度。总结了各种相关控制算法的优缺点,并提出了智能车辆横向和纵向控制的未来发展方向,包括:深化横向控制算法研究以提升安全性;优化纵向控制以确保运动稳定性;提升耦合控制精度以增强整体控制效果。
徐伟瑞
关键词:智能汽车车辆模型
Acute Transverse Myelitis in Pregnancy—A Case Report and a Literature Review
2024年
Purpose: This case report highlights a rare instance of a 26-week pregnant woman presenting with limb numbness, diagnosed with acute transverse myelitis (ATM) following COVID-19 vaccination. Notably, she tested positive for neuromyelitis optica (NMO) but did not exhibit the typical symptoms of blurred vision. Methods: Data were collected from I Seha in governmental hospitals in Bahrain, providing a comprehensive overview of the patient’s clinical journey. Results: The patient was treated with carbamazepine, steroids, and clexane, leading to the successful delivery of a healthy baby at 34 weeks. However, two years postpartum, she reported new episodes of blurred vision and numbness. Subsequent treatment with Rituximab resulted in significant improvement, with a diagnosis of Devic’s disease established. Conclusion: Acute transverse myelitis is a rare condition, particularly during pregnancy, and in this case, symptoms of Devic’s disease were masked by the absence of blurred vision. This condition predominantly affects females in their 20s during childbearing years and can lead to complications such as premature delivery. Effective management includes steroids and antiepileptic drugs, with clexane playing a crucial role in preventing embolisms. A delivery mode may vary based on obstetric factors, and MRI remains the gold standard for diagnosis. Close follow-up is essential for optimal patient outcomes.
Huda Abbas Ali IsaFatema HasanZainab Mohd Al AswadNaeema Ahmed Abdulkareem
The Effect of Transverse Tibial Bone Transfer in the Treatment of Diabetic Foot
2024年
To analyse the effectiveness of performing a transverse tibial bone graft in the treatment of patients with diabetic foot. We retrospectively analysed the clinical details of 51 diabetic foot patients in our hospital from February 2023 to February 2024 and divided them into two groups according to the different treatment modalities, in which the control group received open debridement and the treatment group received transverse tibial bone transfer and compared the differences between the two groups. There were large differences in VAS score, Toronto Clinical Symptom Score, quality of life score, internal lumen diameter, blood flow velocity in the affected limb, perfusion volume, vascular endothelial growth factor, epidermal growth factor and CRP between the two groups after surgery (P < 0.05). Patients with diabetic foot should be treated with transverse tibial bone grafting, which is safer and more effective and can have a significant impact on improving the status of the affected limb, the inflammation and the patient’s quality of life.
Qiaoyu ChengJunli Xue
关键词:PROGNOSIS
腹腔镜扩大结肠癌根治术与单纯中横结肠癌根治术解剖学及临床意义
2024年
目的探索中横结肠癌解剖学及生物学特性的关联,研究术式选择的差异与预后关系,确定最佳手术方式。方法利用解剖学和影像学数据,研究大体标本、三维血管重建图,回顾性分析中横结肠癌患者不同腹腔镜手术方式的临床效果和生存情况。结果(1)解剖并观察大体标本,发现一、二级血管结扎可确保结肠吻合口的血液供应;(2)术前三维血管重建与术中血管探查符合率大于90%;(3)横结肠切除组与扩大结肠切除组相比,术中出血量、手术时间、术后并发症、总生存率无统计学差异,两组淋巴结清扫数目有统计学差异。结论腹腔镜下单纯横结肠切除较扩大结肠癌根治术有降低术后并发症风险趋势,两者预后无统计学差异,横结肠切除是中横结肠癌最佳手术方式。
曾俊曾俊刘奇张越刘志远苏嘉睿吴嘉伟姚学清
关键词:临床预后
腹横筋膜平面阻滞与腹横肌平面阻滞对腹腔镜子宫切除术患者阿片类药物用量及应激反应的影响
2024年
目的探讨腹横筋膜平面阻滞与腹横肌平面阻滞对腹腔镜子宫切除术患者阿片类药物用量及应激反应的影响。方法选取2020年1月至2021年12月丰城市人民医院接受腹腔镜子宫切除术的70例患者作为研究对象,按照随机数字表法分为对照组与观察组,每组35例。所有患者均行超声引导下采取神经阻滞、腹腔镜子宫切除术,对照组于术后行双侧腹横肌平面阻滞,观察组于术后行腹横筋膜平面阻滞。比较两组阿片类药物用量(术后24、48 h内阿片类药物用量)、补救镇痛率和手术前后40项恢复质量评分量表(QoR-40)评分、炎症因子[白细胞介素(IL)-6,IL-8]水平及不良反应发生率。结果观察组术后24、48 h内阿片类药物用量均少于对照组,差异有统计意义(P<0.05);观察组补救镇痛率为5.71%,低于对照组的22.86%,差异有统计意义(P<0.05)。术后,两组QoR-40评分均低于术前,但观察组高于对照组,差异有统计意义(P<0.05)。术后1 d,两组IL-6、IL-8水平均高于术前1 d,但观察组低于对照组,差异有统计意义(P<0.05)。观察组不良反应发生率为17.12%,低于对照组的39.97%,差异有统计意义(P<0.05)。结论与术后行腹横肌平面阻滞相比,对行腹腔镜子宫切除术患者术后开展腹横筋膜平面阻滞镇痛效果更理想,可减少阿片类药物用量,改善炎症反应,提高患者恢复质量,降低补救镇痛率及不良反应发生率。
鲍文珑袁娜平涂文娟
关键词:腹腔镜子宫切除术腹横肌平面阻滞
Transverse momentum balance of dijets in Xe+Xe collisions at the LHC
2024年
We present a theoretical study of the medium modifications of the p_(T)balance (x_(J)) of dijets in Xe+Xe collisions at■.The initial production of dijets was carried out using the POWHEG+PYTHIA8 prescription,which matches the next-toleading-order (NLO) QCD matrix elements with the parton shower (PS) effect.The SHELL model described the in-medium evolution of nucleus–nucleus collisions using a transport approach.The theoretical results of the dijet xJin the Xe+Xe collisions exhibit more imbalanced distributions than those in the p+p collisions,consistent with recently reported ATLAS data.By utilizing the Interleaved Flavor Neutralisation,an infrared-and-collinear-safe jet flavor algorithm,to identify the flavor of the reconstructed jets,we classify dijets processes into three categories:gluon–gluon (gg),quark–gluon (qg),and quark–quark (qq),and investigated the respective medium modification patterns and fraction changes of the gg,qg,and qq components of the dijet sample in Xe+Xe collisions.It is shown that the increased fraction of qg component at a small x_(J)contributes to the imbalance of the dijet;in particular,the q_(1)g_(2)(quark-jet-leading) dijets experience more significant asymmetric energy loss than the g_(1)q_(2)(gluon-jet-leading) dijets traversing the QGP.By comparing the■of inclusive,■ dijets in Xe+Xe collisions,we observe■.Moreover,ρ_(Xe),P_(b),the ratios of the nuclear modification factors of dijets in Xe+Xe to those in Pb+Pb,were calculated,which indicates that the yield suppression of dijets in Pb+Pb is more pronounced than that in Xe+Xe owing to the larger radius of the lead nucleus.
Yao LiShu-Wan ShenSa WangBen-Wei Zhang
Early postoperative complications after transverse colostomy closure,a retrospective study
2024年
BACKGROUND Ostomy is a common surgery usually performed to protect patients from clinical symptoms caused by distal anastomotic leakage after colorectal cancer(CRC)surgery and perforation or to relieve intestinal obstruction.AIM To analyze the complications after transverse colostomy closure.METHODS Patients who underwent transverse colostomy closure from Jan 2015 to Jan 2022 were retrospectively enrolled in a single clinical center.The differences between the complication group and the no complication group were compared.Logistic regression analyses were conducted to find independent factors for overall complications or incision infection.RESULTS A total of 102 patients who underwent transverse colostomy closure were enrolled in the current study.Seventy(68.6%)patients underwent transverse colostomy because of CRC related causes.Postoperative complications occurred in 30(29.4%)patients and the most frequent complication occurring after transverse colostomy closure was incision infection(46.7%).The complication group had longer hospital stays(P<0.01).However,no potential risk factors were identified for overall complications and incision infection.CONCLUSION The most frequent complication occurring after transverse colostomy closure surgery in our center was incision infection.The operation time,interval from transverse colostomy to reversal,and method of anastomosis might have no impact on the postoperative complications.Surgeons should pay more attention to aseptic techniques.
Fei LiuXiao-Juan LuoZi-Wei LiXiao-Yu LiuXu-Rui LiuQuan LvXin-Peng ShuWei ZhangDong Peng
关键词:COMPLICATIONS
Magneto-optical isotope enrichment of potassium-40 with transverse cooling
2024年
Isotope shifts among different isotopes can be effectively addressed using narrow-linewidth lasers,facilitating laser isotope separation and achieving significant enrichment at a single stage.The separation of potassium isotopes,employing optical pumping and magnetic deflection,has proven to be efficient.To further improve the enrichment of ^(40)K,we introduce 2D transverse cooling to minimize the divergence angle.Through this modification,we demonstrate enrichment of ^(40)K,elevating it from 0.012%to 12%–20%.This represents an enrichment increase by three orders of magnitude,surpassing our previous result by one order.Our method is particularly well-suited for isotope enrichment of elements with extremely low abundance.
Shangjin LiZixuan ZengBo Yan
超宽混凝土桥面板横向分块浇筑施工研究
2024年
超宽混凝土桥面板是桥梁工程中的关键部位之一,其横向分块浇筑施工是提高桥面板质量的关键因素。结合一座宽61.7 m的超宽桥梁,采用MIDAS FEA有限元软件建立混凝土桥面板横向分块浇筑施工模型,分别对横向分2块浇筑、横向分4块由外向内浇筑、横向分6块由外向内浇筑、横向分6块先浇筑最外侧再浇筑最内侧最后浇筑中间块,4种施工方案进行计算对比,得到最佳施工方式为半幅横向分4块由外向内浇筑,与实际现场施工时采用的施工方法一致。
台晓晓
电子横向初始位置对高能电子轨迹和辐射特性的影响
2024年
为得到圆偏振激光脉冲与电子碰撞后电子的最佳辐射特性,通过控制变量的方法,选取电子的若干个横向初始位置,利用MATLAB程序迭代模拟,并讨论电子横向初始位置对高能电子运动轨迹和辐射特性的影响。结果表明,随着电子横向初始位置的增大,电子的运动轨迹和辐射特性在圆偏振强激光脉冲的作用下受到显著影响。对电子的辐射功率进行分析,当电子处于0.15λ_(0)(λ_(0)=1μm)的横向初始位置,电子的螺旋运动产生的最大辐射功率会达到最佳状态。通过对圆偏振强激光脉冲与电子相互作用的模型进行仿真,发现了电子辐射功率全空间的分布规律,为实际中的精确实验提供了理论依据。
沈曈华欣竹何咏秋严刚田友伟
关键词:辐射功率MATLAB仿真

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