摘要：We found an error in our previous report [Chin. Phys. Lett. 34 （2017） 012902] concerning about the value of voltage on the modulating anode （MA）. This mistake occurs when we shifted calculating positive scale to actual negative voltage scale in the DGUN simulation. The value of voltage on the MA is VMA = -33.5 kV as displayed in Table 1. Also Figs. 2（a）, 2（b） and 4（a） should be as follows. We note that the error does not affect the conclusion of our report at all, and we apologize for inconvenience of readers brought by our oversight.

摘要：Low-frequency vibroseis acquisition has become a routine operation in land seismic surveys,given the advantages of low-frequency signals in characterizing geological structures and enhancing the imaging of deep exploration *** two key points of low-frequency sweep design techniques include controlling the distortion and improving the output energy during the low-frequency ***,the vibrators are limited by the maximum fl ow provided by the hydraulic systems at the low-frequency stage,causing diffi culty in satisfying exploration energy ***,a theoretical analysis of the low-frequency acquisition performance of vibrators is conducted.A theoretical maximum output force below 10 Hz is obtained by guiding through theoretical formulas and combining actual vibrator ***,the signal is optimized according to the surface characteristics of the operation ***,detailed application quality control and operational procedures are *** new low-frequency sweep design method has overcome the maximum flow limitations of the hydraulic system,increased the low-frequency energy,and achieved broadband *** designed signal has been tested and applied on various types of ground surfaces in the Middle East desert region,yielding good *** proposed low-frequency sweep design method holds considerable value for the application of conventional vibroseis in low-frequency acquisition.

摘要：通常斜拉桥的振动检测在限制过桥车辆情况下进行,无法真实反映桥梁实际状态下固有的自振特性,同时也影响当地交通.文中提出利用过桥车辆作为激振源,选择对低阶模态敏感的测点作为参考点,把参考点的测试数据作为输入信号,其它测点的测试结果作为输出信号.通过判定参考点与其它测点相应信号的相干性来识别斜拉桥的固有频率与振型,共识别出天津永和斜拉桥前12阶固有频率和振型,各阶模态频率分阶清楚,振型曲线光滑,与未通车时的测试结果基本吻合.

摘要：【目的】呼吸道合胞病毒(respiratory syncytial virus, RSV)是婴幼儿急性呼吸道感染的最常见原因。基于RT-ERACRISPR/Cas12a技术,建立一种RSV快速特异性的检测方法。【方法】针对RSV N基因保守区域设计合成特异性crRNA及酶促重组等温扩增(ERA)引物,筛选最佳扩增引物-crRNA组合建立检测体系;通过荧光法检测RSV核酸,确定检测方法的灵敏度及特异性。【结果】根据Cas12a的激活原理,针对A型及B型RSV分别设计合成RSV-crRNA1及RSV-crRNA2,二者混合加入检测体系,可同时检测到A型及B型RSV,并具有协同作用;实验筛选出一组最佳引物组合(RSV-F+RSV-R3J),最低检出限为5×10^(2) copies/mL,可在39℃恒温条件下,35 min内完成检测;该方法与其他核酸测试样本无交叉反应,只能检测出RSV核酸,具有较高的特异性。【结论】基于RT-ERA-CRISPR/Cas12a技术,成功建立了一种灵敏度高、特异性强、快速、低成本的RSV核酸检测方法,该方法不依赖复杂的检测仪器,任何能够提供恒温环境和检测荧光信号功能的仪器均可适用。因此,该方法适用于RSV即时检测,还可能应用于其他病原体感染的检测。

摘要：Recurrent oral ulcer is a painful oral mucosal disorder that affects 20%of the world’s *** lack of a radical cure due to its unknown underlying cause calls for innovative symptomatic *** work reports a hyaluronic acid-based dissolvablemicroneedle patch(ROUMNpatch,short for recurrent oral ulcer microneedle)loaded with dexamethasone acetate,vitamin C and tetracaine hydrochloride for the treatment of recurrent oral *** ROUMN patch shows enhancement in both the anti-inflammatory effect elicited by dexamethasone and the pro-proliferation effect of vitamin *** vitro experiments show that ROUMN has a higher efficiency in suppressing lipopolysaccharide(LPS)-induced interleukin-6(IL-6)expression than dexamethasone *** proliferation and migrationwere also significantly promoted byROUMNcompared to vitamin C *** healing-promoting effect of ROUMN was also verified in vivo using an acetic acid-cauterized oral ulcer model in *** as a treatment accelerated the healing process of oral ulcers,shortening the total healing time to 5 days compared with the 7 days required by treatment using watermelon frost,a commonly used over-the-counter(OTC)drug for oral *** rapid dissolution of the hyaluronic acid-based microneedles and the superior healing-promoting effect of the drug combination could lead to a broad application prospect of the ROUMN patch in the treatment of recurrent oral ulcers.

摘要：基于Navier-Stokes方程的数值模型和物理模型实验研究流体晃荡现象存在计算效率低和经济成本高的不足。为此,本文通过构建神经网络模型对数值和实验结果进行时序重构,预测流体晃荡的压强和波高。以数值和实验的总压强和自由表面高程数据作为训练样本,将神经网络中表征能力强的CNN、RNN、LSTM用于重演流体晃荡响应的时间演化过程。在模型训练过程中,系统地调节神经网络的内部结构参数,分析预测结果与实际值之间的误差和相关性。结果表明,RNN和LSTM的重构误差低于4%,相关性达到0.88,整体优于CNN;LSTM的整体性能最佳,可以作为预测长序列数据的首选。整体来讲,三种代理模型均可以较好地复现流体晃荡的波高和压强,在流体晃荡研究方面具有良好的应用前景。

摘要：通过离散元方法模拟对水平微分单元法及其基本假设进行验证,论证了水平微分单元法用于绕墙顶旋转(RT)模式下有限土体主动土压力研究的合理性.基于离散元模拟结果,针对Ⅰ、Ⅱ区土体分别采用不同的圆弧形小主应力轨迹线考虑土拱效应,假设土体滑裂线为二次抛物线,通过改进水平微分单元法,依据静力平衡条件推导出RT模式下有限土体主动土压力的计算公式.通过与离散元方法模拟结果及其他已有模型试验结果的对比,验证了该公式的合理性及有效性.

摘要：针对传统带传动测试系统存在的问题 ,利用单片机开发一种主从带轮速度非接触式的同步测量转速、滑差率、转矩、效率实时显示的动态测试仪。论述了该测试仪工作原理、组成、软件的设计。

摘要：这份报纸调查控制港口的 Hamiltonian (PCH ) 多代理人系统的产量一致问题与修理并且切换的拓扑学。第一，一个分布式的组产量一致协议经由塑造方法全球性到达稳定性和组产量一致的能量被设计。第二，一个新分布式的控制协议被使用 PCH 系统的结构的性质建议。这个协议的优点是它能由构造一种虚拟邻居转变指导的图到未受指导的图。第三，一个控制协议被设计，扩大 LaSalle0s 不变性原则在联合连接的拓扑学条件下面为交换系统发展了让所有代理人当拓扑学正在切换时，到达输出一致。最后，有模拟的一些解说性的例子被提供表明在这份报纸设计的协议的有效性。

摘要：随着我国城市化进程不断加快,人们对建筑物舒适度的要求不断提高,大型公用建筑能耗强度较高,其供冷供热能耗占总能耗近60%。“双碳”目标提出后,降低公用建筑能耗是建筑节能和绿色建筑实施的必经之路。文章以冬冷夏热地区某新建医院为例,对其采暖制冷负荷进行模拟分析,根据负荷需求,结合区域供能特点,采用光伏+地源热泵,结合区域供热和绿电,配置了适用于冬冷夏热地区的多能协同冷热联供系统。该系统不仅具有良好的节能降碳优势,与常规“水冷机组+燃气锅炉”供能相比,还具有明显的经济效益。在冬冷夏热地区大型公共项目中具有一定的推广意义。