摘要：Background:Renal artery stenosis (RAS) is always associated with abnormalities in renal microvascular perfusion (RMP).However,few imaging methods can simultaneously evaluate the degree of luminal stenosis and ***,this study will aim to evaluate the feasibility of using contrast-enhanced ultrasound (CEUS) for assessing both RAS and RMP to achieve a one-stop assessment of patients with suspected renovascular hypertension. Methods:This will be a single-center diagnostic study with a sample size of *** with chronic kidney disease (CKD) and suspected of having resistant hypertension will be *** with Stages 1–3 CKD will undergo CEUS and computed tomography (CT) angiography (CTA).Values obtained by CEUS and CTA for diagnosing low-grade (lumen reduced by <60%) and high-grade (lumen reduced by ≥60%) RAS will be ***,all patients will also undergo radionuclide *** diagnostic value for RAS will be assessed by the receiver operating characteristic curve,including the accuracy,sensitivity,specificity,positive predictive values,negative predictive values,and area under the *** correlation analysis will be performed to assess the association between CEUS findings for RMP and glomerular filtration rate measured by a radionuclide imaging method. Conclusion:The data gathered from this study will be used to evaluate the feasibility of expanding clinical applications of CEUS for evaluation of patients with suspected renovascular hypertension.

摘要：概括了国内外生活方式购物中心的发展情况,从主题策划、空间规划、使用细节3个方面分析了生活方式购物中心外部空间的设计内容,

摘要：在现代通信系统中,滤波器的使用越来越广泛。本文通过两种仿真软件的协同仿真分析,来实现一个耦合线带通滤波器的设计。首先通过理论计算公式得到耦合线的奇偶模阻抗,然后在ADS软件中进行初次仿真分析。考虑到实际损耗的以及环境的影响,由ADS得到的结果作为HFSS的初始参数再在HFSS软件中进行优化设计。优化设计结果表明该耦合线带通滤波器在1 db损耗内的带宽为1.57~2.17 GHz,且在该频率范围内的回波损耗小于-10 d B,可以满足射频微波通信系统的要求。

摘要：经过分析模块化多电平换流器上下桥臂电流成分以及子模块电容电压波动特性,计算桥臂子模块电容2倍频电流,提出了一种抑制柔性直流输电电容电压波动的方法。该方法通过向桥臂中注入2倍频电流来抑制电容电压波动。设计了2倍频谐波注入控制器,通过控制桥臂中2倍频环流的大小来达到最优化减小子模块电容电压波动。通过PSCAD仿真比较了环流抑制为零和注入二次谐波情况下的电容电压波动大小,并对电容电压波动进行了谐波分析,验证了所提出方法的正确有效性。

摘要：Transition metal phosphides(TMPs)are recognized as such promising supercapacitor materials for the practical application,due to their superior electrical conductivity and excellent redox ***,self-supported three-dimensional NiCoP nanoparticles embedded in NiCoO2 nano wires(NiCoO2/NiCoP)electrode consisting of nickel cobalt phosphides(NiCoP)with high activity and nickel cobalt oxides(NiCoO2)with good stability were fabricated by a hydrothermal and phosphorization *** electrode integrates the advantages of nanowire arrays for fast ion transport and foam Ni for effective charge transport and *** the proper composition control of the nanohybrid and unique structure design,the optimized NiCoO2/NiCoP-20 exhibits a high specific capacitance of 3204 F·g-1 at 1 A·g-1 in 3 mol·L-1 KOH aqueous electrolyte in a three-electrode ***,the asymmetric supercapacitor assembled with the prepared NiCoO2/NiCoP-20 and activated carbon achieves a specific capacitance of 116 F·g-1 with a high energy density of 40.32 Wh·kg-1 at the power density of 800.18 W·*** practical application is further demonstrated with all-solid-state winding supercapacitor devices,with decent flexibility,in series to light the Central South University(CSU)logo consisting of 21 red LED indicators.

摘要：为了跟踪国内外海上水面自主船舶(MASS)发展进程,深化对MASS自主性的理解,对国内外MASS在标准规范及科研项目上的发展进行梳理;通过绘制时间尺度上的人机运行机制图对MASS自主性进行解析并以航行感知系统为例进行实例化解读;对MASS的风险评估、模型基础、试验实践内容进行展望。总结分析目前MASS现状和主要问题,提出MASS的3种自主运行模式,为MASS的详细设计及未来发展提供依据和思路。

摘要：针对永磁直线同步电机的控制问题,常规PID控制器不能获得理想的控制效果,模拟生物免疫调节机理,同时结合现在模糊控制理论设计了一种全新的免疫模糊自适应PID控制器,并进行了仿真实验.

摘要：当前设备缺陷检测集成平台功能多局限于局域,处理速度慢,频次低。为此设计基于多工位视觉检测的设备缺陷检测集成平台。首先接入控制装置,设计核心电路,完成硬件设计。采用多工位视觉检测技术,提升集成处理速度,完成设备缺陷集成功能模块的构建,并与自适应集成处理数据库建立联系。测试显示,在5组随机选定的测试工位中,经过3个周期对比,设备缺陷集成处理频次均达到25次以上。这表明多工位视觉检测技术有效提升了平台的应用效率和稳定性,实现了多维核验实践。

摘要：我国提出碳达峰碳中和的“3060”目标以来,陆续发布城镇低碳发展的政策文件,“十四五”规划也明确我国绿色低碳转型目标,作为城镇市政基础设施中绿色底色、低碳载体和人民群众获得感的重要体现,城镇污水系统的收集、转输、处理、回用全过程低碳技术已成为行业的热点难点和新突破方向。从城镇污水系统组成要素出发,以安全、高效、生态、智慧作为低碳发展原则,探讨排水系统碳排放的重要节点与碳减排核心方向,构建面向未来可落地实施的城镇污水系统低碳发展路径。

摘要：随着子午线轮胎用量的增加 ,开发性价比高的纤维帘布全自动裁断设备非常迫切。自动对接系统是实现纤维帘布全自动裁断的关键。主机传送带跑偏带来的垂直方向的位移远大于系统最低误差要求 ,因此 ,帘布的边缘值检测只能在对接前瞬间完成 ,否则边缘检测将失去意义。通过激光自动测边系统的全新设计 ,以及全数字交流伺服定位系统速度模式与位置模式的组合较好地解决了这一问题。实际运行结果表明 :系统综合性能指标符合工艺要求 ,定长裁断误差小于± 1mm ,对接成功率高于 90 %。