摘要：For the reliability and power consumption issues of Ethernet data transmission based on the field programmable gate array （FPGA）, a low-power consumption design method is proposed, which is suitable for FPGA implementation. To reduce the dynamic power consumption of integrated circuit （IC） design, the proposed method adopts the dynamic control of the clock frequency. For most of the time, when the port is in the idle state or lower-rate state, users can reduce or even turn off the reading clock frequency and reduce the clock flip frequency in order to reduce the dynamic power consumption. When the receiving rate is high, the reading clock frequency will be improved timely to ensure that no data will lost. Simulated and verified by Modelsim, the proposed method can dynamically control the clock frequency, including the dynamic switching of high-speed and low-speed clock flip rates, or stop of the clock flip.

摘要：基于HOPKINSON杆冲击剪切试验技术、复合材料层板的材料性能及应用特点的分析,对"杆-管"冲击剪切动态力学性能实验技术进行了改进优化,解决了输入杆跳动、同轴调节困难、结果分散大等实验技术问题。根据输入杆、输出管和复合材料试样的匹配分析,确立了输入杆、试样和输出管针对动态冲击剪切实验的约束尺寸条件。通过有限元数值分析,研究了预置剪切间隙对冲击剪切的影响,研究认为0.2 mm～0.3 mm间隙设计对Ф14.5 mm输入杆冲击2mm～4 mm层板试样的冲剪试验是合适的。冲击剪切实验数据表明,加载率对玻纤增强复合材料层板的动态剪切力学性能影响明显。

摘要：Arrhythmogenic right ventricular cardiomyopathy(ARVC)is a progressive disease characterized by adipose and fibrous replacement of the *** elevated testosterone levels have been implicated in the pathological process of ARVC,its exact contribution to cardiac fibrosis in ARVC remains *** this study,we analyzed the potential contribution of gender-based differences on the distribution of the low-voltage area in an ARVC cohort undergoing an electrophysiological study,which was indicated by feature ***,we established engineered cardiac spheroid models in vitro using patient-specific induced pluripotent stem cell(iPSC)-derived cardiomyocytes(iPSC-CMs)and iPSC-derived cardiac fibroblasts(icFBs).We elucidated the pathogenicity of abnormal splicing in the plakophilin-2(PKP2)gene caused by an intronic ***,pathogenic validation of the desmoglein-2(DSG2)point mutation further confirms the reliability of the ***,testosterone exacerbated the DNA damage in the mutated cardiomyocytes and further activated myofibroblasts in a chain *** conclusion,we designed and constructed an in vitro three-dimensionally-engineered cardiac spheroid model of ARVC based on clinical findings and provided direct evidence of the fibrotic role of testosterone in ARVC.

摘要：指出了破片侵彻试验中所用破片质量的变化趋势,详细介绍了3种新型破片发射装置;从弹托的制作材料、无差别分瓣式设计、空气动力学弹托分离技术和拦截弹托分离技术4个方面分析阐述了弹托设计与分离技术;比较说明了吸能、弹道极限V50和比吸能等抗破片性能表征指标在实际应用中的情况;展望了防护材料抗破片性能试验模拟表征技术的发展方向。

摘要：以大口径霍普金森压杆试验中入射波整形为目的,利用ANSYS/LS-DYNA软件模拟并分析了∅100 mm分离式霍普金森压杆试验中圆形整形器受到∅100 mm压杆碰撞后的形变过程,发现圆形整形器存在应力较高的环状区域。为提高应力均匀性,提出了一种圆环形整形器设计方案,并对圆环形整形器的整形效果进行了仿真分析。结果表明,与圆形整形器相比,圆环形整形器应力波波形更加平滑,入射波上升时间更长,有利于试件尽早达到应力均匀。在混凝土试件压缩试验中,经圆环形整形器作用的反射波为平台波,可基本实现大尺寸混凝土试件的恒应变率加载。

摘要：This paper presents an efficient method for globally optimizing and automating component sizing for rotary traveling wave oscillator arrays. The lumped equivalent model of transmission lines loaded by inverter pairs is evaluated and posynomial functions for oscillation frequency, power dissipation, phase noise, etc. are formulated using transmission line theory. The re- sulting design problem can be posed as a geometric programJning problem, which can be efficiently solved with a convex opti- mization solver. The proposed method can compute the global optima more efficiently than the traditional iterative scheme and various design problems can be solved with the same circuit model. The globally optimal trade-off curves between competing objectives are also computed to carry out robust designs and quickly explore the design space.

摘要：文章以目前气体动力学课程教学实践中存在的问题为牵引,结合CDIO(Conception,Design,Implementation,Operation)工程教育培养模式,对课程教学进行重新设计和规划。课程教学实践证明,将CDIO教学理念引入到课程教学中,激发了学生的学习动力,学生在基础理论、动手实践和团队协作等方面能力素质得到了全面的锻炼和提高。

摘要：目的探讨腹腔镜联合上腹正中切口微创肝移植的技术流程和临床应用。方法回顾性分析30例腹腔镜联合上腹正中切口微创肝移植的病例资料,根据原发病分为肝硬化组(15例)和肝衰竭组(15例),比较两组患者手术情况及术后情况。结果采用腹腔镜下“顺时针”病肝切除方法,所有患者均顺利完成,无被动中转开腹情况或不耐受气腹情况发生。病肝游离时右肝偏大,右侧肝周韧带无法完全游离有6例。开腹时加用反“L”切口1例。所有患者均顺利完成肝移植手术,30例患者均无术中大出血、心血管事件等发生。肝硬化组终末期肝病模型(MELD)评分低于肝衰竭组(P0.05)。围手术期发生肝动脉栓塞1例,门静脉吻合口狭窄1例,无肝静脉和下腔静脉并发症,胆道吻合口狭窄3例,均发生在肝衰竭组。结论在严格筛选的病例中,腹腔镜下病肝切除联合上腹正中切口供肝植入的微创肝移植术式具有切口小、出血少、相对易操作、术后恢复快的优势,值得临床推广应用。

摘要：通过爆炸自由膨胀实验技术,采用特殊的薄环试样,对树脂基纤维增强复合材料在超高应变率(104/s)下进行了冲击拉伸实验研究。通过自由膨胀环实验,得到了一些芳纶纤维、玻璃纤维、碳纤维等增强的树脂基复合材料在超高压应变率下的冲击拉伸试验数据,在实验中应用了简便的应变片电测技术,并优化了装药和试样环的设计。为了验证实验数据,采用LY12cz铝合金进行了不同应变率下应力-应变拉伸性能的比较。通过树脂基复合材料爆炸自由膨胀环实验的分析,对实验技术中存在的问题提出了一些建议。研究表明,爆炸自由膨胀环拉伸技术是目前获得纤维增强复合材料超高应变率力学性能的1种相当有效的实验方法。

摘要：以深圳市科技馆(新馆)项目为例,研究其施工过程中的柔性种植毯铺贴式立体景观工艺技术,以充分实现曲面立体绿化景观和三星级绿色建筑建设目标。该技术集生态、科技、艺术、绿色景观于一体,具备固碳释氧、滞尘降噪、隔热降温、控制雨水径流等功能,有利于降低建筑能耗、减少城市热岛效应和缓解城市排水压力等,为助力低碳环保星级绿色建筑打造起到良好的示范和参考意义。