摘要：在当前社会快速发展与科技进步的推动下,地下空间利用水平不断提高,为尽可能减小基坑开挖对周边环境的影响,排砖加钢筋混凝土内支撑方式得到广泛应用。多圆环内支撑体系能够有效控制基坑变形,确保支撑体系安全性,基于某市深基坑支撑布置项目,深入探讨了多元换内支撑体系在软土基坑的具体应用实践,结合工程需要阐述了软土基坑支护设计和施工技术,从而为地下基坑建设领域提供一种更加经济、高效且质量卓越的解决方案。

摘要：下颌骨髁突是颞下颌关节的重要组成部分.颞下颌关节炎(TMJOA)患者常发生髁突异常改变,提示TMJOA病变进展.针对现有工作对于髁突骨微结构的研究不深入,预测髁突病变前的形态比较缺乏的问题,提出一种锥形束计算机断层扫描(CBCT)影像中髁突骨微结构分割方法.首先结合髁突的几何特征,通过数据扩充模块增加训练样本数;然后采用边缘提取模块有效地捕捉髁突边界信息,通过纹理特征提取模块获取影像中的纹理特征;最后将边界信息与解码器中得到的特征图进行融合,获得不同尺度的边缘增强区域特征图,增强模型对纹理和边缘的感知.在髁突CBCT数据集上对髁突骨微结构分割的实验结果表明,所提方法在髁突骨微结构的分割中取得了良好的效果,皮质部分的分割Dice达到0.901,松质部分的分割Dice达到0.958;在病变前皮质形态预测的实验结果表明,预测结果的Dice值为0.948,验证了该方法比文中对比方法具有更好的性能.所提方法为TMJOA病变的影像诊断和治疗提供了有力的支持和指导.

摘要：电站负荷波动情况下,水电机组的调节特性受多种因素影响,导致水电机组一次调频性能的优化变得尤为困难,水电机组的稳定性较差。为此,提出电站负荷波动动态响应下水电机组一次调频鲁棒优化研究。通过分析水电机组参与的电站负荷波动动态响应模型,使用并联型PID调节器完成水电机组一次调频模型的设计,利用一次调频模型操作调控水轮机导叶的开启与闭合,实现精确的动作控制,采用CPSOGSA算法优化PID控制参数,实现考虑电站负荷波动动态响应的水电机组一次调频鲁棒优化。试验结果表明:本文所提方法能够有效保障水电机组的稳定性,使频率调节幅度达到目标平稳值。

摘要：Large threshold voltage and small on-state current are the main limitations of the normal tunneling field effect transistor (TFET). In this paper, a novel TFET with gate-controlled P+N+N+ structure based on partially depleted GeOI (PD-GeOI) substrate is proposed. With the buried P+-doped layer (BP layer) introduced under P+N+N+ structure, the proposed device behaves as a two-tunneling line device and can be shut off by the BP junction, resulting in a high on-state current and low threshold voltage. Simulation results show that the on-state current density Ion of the proposed TFET can be as large as 3.4 × 10^−4 A/μm, and the average subthreshold swing (SS) is 55 mV/decade. Moreover, both of Ion and SS can be optimized by lengthening channel and buried P+ layer. The off-state current density of TTP TFET is 4.4 × 10^−10 A/μm, and the threshold voltage is 0.13 V, showing better performance than normal germanium-based TFET. Furthermore, the physics and device design of this novel structure are explored in detail.

摘要：目的探讨基于彩色多普勒超声(CDU)定位的分层削薄旋髂浅动脉穿支(SCIP)皮瓣的临床疗效。方法该研究为回顾性观察性研究。2023年2月—2024年2月,首都医科大学附属北京积水潭医院手外科收治符合入选标准的肢体创面患者14例,其中男11例、女3例,年龄15~60岁,创面面积为7 cm×4 cm~14 cm×11 cm。皮瓣移植术前应用CDU准确定位旋髂浅动脉浅支的深筋膜穿出点,术中分层削薄SCIP皮瓣,修复11例患者的手部、前臂创面和3例患者的足部创面,皮瓣切取面积为8 cm×5 cm~15 cm×12 cm。将皮瓣供区创面直接缝合。术中观察皮瓣供区内旋髂浅动脉浅支的深筋膜穿出点,并与术前CDU定位情况进行比对;测量皮瓣厚度。术后观察皮瓣成活情况及不良反应发生情况。随访时,观察皮瓣外观和质地、供区创面愈合情况。末次随访时,按照中华医学会手外科学会上肢部分功能评定试用标准对患肢腕、手功能进行评价,按照美国矫形足踝协会评分标准对患肢足踝功能进行评价。结果术中观察到所有皮瓣供区内旋髂浅动脉浅支的深筋膜穿出点与术前CDU定位一致,二者距离均<10 mm;皮瓣厚度为5~8 mm,平均6.2 mm。术后皮瓣均成活。随访5~12个月,所有皮瓣外观和质地良好;供区创面均愈合,仅遗留线性瘢痕。末次随访时,患肢腕、手功能评定为优者9例、良者1例、可者1例;患肢足踝功能评定为优者1例、良者2例。结论CDU检查能够为分层削薄SCIP皮瓣提供术前精确的穿支定位,有助于优化皮瓣设计,从而在一定程度上避免因术前设计不当导致的皮瓣坏死问题,提升手术安全性。此外,分层削薄SCIP皮瓣对供区的损伤较小,有利于患肢功能的恢复,值得临床推广。

摘要：本研究深入分析了钢管桩-锚杆联合支护技术在具体房建工程中的应用。该工程由于基坑周边地形地质的复杂性,采用了钢管桩与锚杆联合的方法进行基坑支护,确保了施工的安全性与结构的稳定性。详细描述了钢管桩的设计、锚杆的安装及关键施工技术,并对施工过程中的关键控制点进行了讨论,以展示该技术在解决复杂地质条件下的有效性。

摘要：Stroke is one of the most serious diseases that threaten human life and *** is a major cause of death and disability in the *** strategies for motor rehabilitation after stroke are undergoing *** aimed to develop a novel artificial neural rehabilitation system,which integrates brain--computer interface(BCI)and functional electrical stimulation(FES)technologies,for limb motor function recovery after *** conducted clinical trials(including controlled trials)in 32 patients with chronic *** were randomly divided into the BCI-FES group and the neuromuscular electrical stimulation(NMES)*** changes in outcome measures during intervention were compared between groups,and the trends of ERD values based on EEG were analyzed for BCI-FES *** showed that the increase in Fugl Meyer Assessment of the Upper Extremity(FMA-UE)and Kendall Manual Muscle Testing(Kendall MMT)scores of the BCI-FES group was significantly higher than that in the sham group,which indicated the practicality and superiority of the BCI-FES system in clinical *** change in the laterality coefficient(LC)values based onμ-ERD(ΔLCm-ERD)had high significant positive correlation with the change in FMA-UE(r=0.6093,P=0.012),which provides theoretical basis for exploring novel objective evaluation methods.

摘要：针对5G时代电信网络运维面临的挑战,提出一种基于人工智能(Artificial Intelligence,AI)技术的电信网络智能运营系统。该系统通过网络监控、智能分析及自动运维模块的协同工作,实现了网络异常检测、故障预警及性能优化等功能,有效提高了网络运维效率和服务质量。实验结果表明,该系统能够显著缩短故障定位时间,提高故障预警准确率和自动优化成功率,为电信网络的智能化运维提供有力支持。

摘要：After summarizing the relevant researches on the medium Mn steels in references, two new targets on the tensile properties have been defined. One is that both transformation-induced（TRIP） and twinninginduced plasticity（TWIP） could be realized for the steel with a relatively low Mn content, which exhibits the similar tensile properties to the classical TWIP steels with higher Mn content. The other is to achieve ultrahigh ultimate tensile strength（〉1.5 GPa） without sacrificing formability. To achieve these goals,new designing strategies was put forward for compositions and the processing route. In particular, warm rolling was employed instead of the usual hot/cold rolling process because the former can produce a mixture of retained austenite grains with different morphologies and sizes via the partial recrystallization. Consequently, the retained austenite grains have a wide range of mechanic stability so that they can transform to martensite gradually during deformation, leading to enhanced TRIP effect and then improved mechanic properties. Finally, it is succeeded in manufacturing these targeted medium Mn steels in laboratory, some of them even exhibit better tensile properties than our expectation.

摘要：为高效计算舆情评价指标权重,并考虑融入舆情发展阶段特点信息对于舆情热度预测的影响,利用高斯混合模型定量计算各指标的权重,求得较精准的舆情热度值,在此基础上,结合舆情发展各阶段特点信息,建立基于CNN-LSTM的多变量舆情热度预测模型CNN-LSTM-STAGE(CLS)。以新浪微博为平台,选取“扬州疫情”等4个网络热门舆情事件进行实例分析,预测舆情热度趋势。实验结果表明,融入舆情发展阶段特点信息能有效预测舆情的热度趋势,为舆情管控提供决策支持。