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良好的电化学动态响应性能以及功率输出的长期耐久性是高温可逆固体氧化物电池（reversible solid oxide cell，RSOC）应用于调频等电力辅助服务的技术基础。针对一种新型内嵌微流道的扁管式电堆，从调频控制的角度，试验考察了RSOC电堆的发电/电解工作控制特性、负荷动态响应特性以及长时间运行衰减特性。结果表明，新型电堆燃料传质特性良好，可优先选择氢气流量、水氢比、工作温度等参数实现对应发电/电解模式下的调频应用控制。在温度控制不变的情况下，动态试验表明了新型电堆受传质/传热影响，电压弛豫时间难以达到秒级，单一电参量的调控难以满足调频控制精度需求，需要进行电压环、电流环的串级控制，才可实现精准调频。可靠性方面，相较单电解工作模式，发电/电解工作模式反复切换下，新型电堆出现了工作性能优化现象，故认为通过合理的工作模式切换策略，RSOC电堆可用于长期可逆动态运行工况，满足辅助调频的寿命要求。

文章采用矩阵光学方法,结合高斯光束耦合理论,推导出了反射式微电子机械系统（MEMS）可变光衰减器（VOA）波长—损耗相关特性公式;对透镜和插针之间空气隙的长度d1、透镜的长度d2、C透镜折射率和曲率半径等影响波长相关损耗（WDL）的因素进行了详细分析,并分别进行了数值仿真,得出了影响波长—损耗相关特性的几个关键因素,这些结果对研制反射式VOA有重要指导意义。

文章介绍了一种具有升级能力和动态增益均衡的低成本可重构光分插复用器（ROADM）。该模块由平面阵列波导光栅、光开关集成可调衰减器（SiVOA）、环行器、探测器、耦合器以及隔离器构成。SiVOA的灵活应用实现了波长的双向传输并降低了模块成本。通过调整SiVOA,可以实现任意单波长或多波长的上下路及功率调节。文章给出了模块的基本工作原理及指标测试结果。

基于密集波分复用（DWDM）的光传送网构成了整个通信网络的基础物理层。为了满足DWDM技术的应用和升级,能够进行在线监测的光通道性能模块成为当前很多光器件公司研究和开发的热点。一个典型的在线光性能监测（OPM）模块能够在线监测通道光功率、中心波长及光信噪比（OSNR）等指标。文章系统地阐述了OPM的应用背景、技术特点、性能指标以及发展前景,并对各厂家生产的OPM模块进行了比较分析。

为了解决光电检测系统检测微弱光信号时的噪声问题,通过建立等效电路模型,推导出了光电检测电路输出信噪比公式并分析了影响系统噪声性能的关键因素。设计了一种可探测微弱光信号、具有宽动态范围和自动换档功能的光电检测系统。实验结果表明,该系统可对微弱光信号进行精确探测。

动态增益均衡技术能够克服级联多通道光放大器自发辐射噪声（ASE）和增益波动的积累带来的光信噪比恶化、动态均衡波长上/下引起的光通道功率变化等,提高长距离、大容量密集波分复用（DWDM）光传输系统的性能.文章综述了几种动态增益均衡器件技术的进展情况,比较了它们的性能,讨论了其在DWDM系统中的重要性和发展趋势.

偏振模色散 （ PMD）已成为发展下一代高速长距离光纤传输系统的主要制约因素 .文中分析介绍了 PMD补偿系统中几种自适应反馈控制技术 ,并详细比较、讨论了各自的特点 .认为偏振度测量法是一种首选技术

文章介绍了一种基于微电子机械系统（MEMS）技术的可调谐光滤波器（TOF）,分析了其基本原理和光学结构,给出了合理的设计方案及所进行的实验验证。实验结果表明,该滤波器性能优良,20 dB带宽

无源光网络（PON）是一种点到多点的光接入技术,采用传统的光时域反射仪（OTDR）技术对PON的各分支光路进行监测出现了技术瓶颈。针对这一问题,文章分析了现有几种解决方案的不足之处,在此基础上,提出了一种以光供能方式驱动光开关测试的新方案,并详细描述了该方案的实现过程。

文章首先对万兆以太网无源光网络（10 G-EPON）的网络拓扑结构、波段的分配和功率预算作了介绍,接着以非对称10 G-EPON光网络单元（ONU）端单纤双向器件（BOSA）为例,对器件研制的关键技术进行了简要探讨,最后介绍了对样机进行的全面测试,并对测试结果做了分析。

光开关和可变光衰减器（VOA）是光通信系统中的关键器件,而微电子机械系统（MEMS）技术是一种具有发展前景的光开关技术。文章提出一种兼具VOA功能的1×2 MEMS光开关,详细介绍了其原理,并且利用矩阵光学推导了插入损耗的计算公式。在设计了透镜的各项参数的基础上制作出了光开关样品,并且将样品的测试结果与计算的结果进行对比分析,指出这种光开关是具有实用价值的。

无源光网络（PON）系统普遍采用点到多点的树形拓扑结构,它的主干光纤的生存性问题关系到整个PON系统的可靠性,因此对主干光纤进行保护是非常必要的。文章介绍一种低成本并可自动切换的PON系统主干光线路保护装置（OLP-P）,并用两个实验来验证OLP-P的自动倒换功能和倒换时间以及在PON系统中的自动倒换功能和倒换恢复时间。

文章分析了基于法布里-珀罗（F-P）腔技术的微机电系统（MEMS）可调谐光滤波器（TOF）的调谐原理,推导并测试了其波长与温度及波长与电压的关系,提出了温度与电压相结合的波长混合控制技术,实现了15301560 nm范围内的波长可调的光滤波器。

基于选发选收光开关方案的光线路保护（OLP）系统满足SDH系统、DWDM系统等多种光传输系统的保护要求,可以有效提高整个光网络的生存能力。保护系统采用模块化的硬件结构和成熟的电信网管架构,实现了光传输系统中光线路的保护恢复、状态监测和路由调度等功能,提高了系统的可靠性和稳定性。

与普通保偏光纤相比,保偏光子晶体光纤（PM-PCF）具有高双折射、低温度偏振系数等优点。文章介绍了将PM-PCF作为偏振模色散（PMD）的补偿元件用于PMD的动态补偿实验,并通过对结果的分析,验证了该补偿系统的性能。

波长选择开关（WSS）是近几年发展迅速的可重构光分插复用器（ROADM）的子系统,其波长开关能够在任意的输入、输出端口之间进行倒换,大大提高了密集波分复用（DWDM）设备的组网能力。文章简述了实现WSS的几种技术方法的特点,阐述了基于液晶技术的WSS的结构,给出了具体的1×2 WSS的光路设计方案,并利用琼斯矩阵从理论上分析了该结构的可行性。

报导了一种采用阵列波导光栅 （ AWG）及梳状分波器 （ Interleaver）技术的 C波段 96波长 / 5 0 GHz间隔的密集波分复用 /解复用器 .器件提供 0 .1 3nm通带宽度 ;通带宽度内各信道插入损耗小于 6.3d B,相邻信道隔离度大于 2 8d B,PDL小于 0 .3d B,在 0～ 65℃温度范围内各信道中心波长变化小于 0 .0 5 nm.

为实现50GHz信道间隔的密集波分复用（DWDM）系统中的光通道性能监测,文章提出一种基于衍射光栅的OCM（光通道监测仪）结构,介绍了该OCM的工作原理。从理论上对其工作范围、响应时间、波长分辨率和通道分辨能力进行了计算和分析,并制作了样品进行实验测试。结果表明,对于传输速率为10Gbit/s/40Gbit/s混合传输的50GHz信道间隔的DWDM系统,该OCM可以对波长、功率性能进行准确监测。

在典型的微电子机械系统（Micro electro-mechanical systems,MEMS）型波长选择开关（Wavelength selective switch,WSS）中,一般使用双轴MEMS微镜来实现波长切换与光功率的衰减。文章从理论上研究了基于MEMS技术的WSS在实现衰减功能时"兔耳"现象产生的机理,并进行了实验验证。实验表明,用衍射理论的解释与实验结果能够较好地吻合。

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Synthetic Crystals is the property of Journal of Synthetic Crystals Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Medical Equipment Journal is the property of Chinese Medical Equipment Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

目的 探讨团体康复模式对老年住院患者生活质量的影响. 方法 选取2021年5月至2022 年5月本院住院患者80例,按随机数字表法分对照组和研究组,每组40例. 对照组采取常规的内科护理方式, 研究组在对照组的基础上采取团体康复模式,比较2组抑郁自评量表(SDS)、一般自我效能感量表(GSES)及健 康状况调查简表(SF-36)评分. 结果 治疗前,2组SDS、GSES评分比较,差异无统计学意义(P>0.05). 治疗 后,研究组SDS、GSES评分高于对照组,差异有统计学意义(P<0.05). 治疗前,2组 SF-36评分比较,差异无 统计学意义(P>0.05). 治疗后,研究组SF-36评分高于对照组,差异有统计学意义(P<0.05). 结论 团体 康复模式可有效改善老年住院患者生活质量,提高其自我效能感. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Frontiers of Computer Science & Technology is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A 69-year-old man presented with a firm plaque on the back for one year. Physical examination revealed a coin-sized red scaly plaque on the back with atrophic center and elevated borders. Bleeding and crusts were visible. Histopathology showed epidermal atrophy, formation of subepidermal blister, superficial dermal edema and increased amount and density of collagen fibers in the dermis. Infiltration of inflammatory cells was observed between collagen fiber bundles and perivessels. The diagnosis was bullous morphea. The skin lesion was improved after 3-month treatments with compound glycyrrhizin tablets and 1% pimecrolimus cream. [ABSTRACT FROM AUTHOR]

Copyright of Journal of South China Normal University (Natural Science Edition) / Huanan Shifan Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of South China Normal University (Natural Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ordnance Industry Automation is the property of Editorial Board for Ordnance Industry Automation and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the risk factors for myocardial injury after Nano-Knife surgery in patients with pancreatic cancer, and to establish a nomogram model for risk prediction. Methods A retrospective analysis was performed for the clinical data of 92 patients with pancreatic cancer who underwent Nano-Knife surgery in The Fifth Affiliated Hospital of Zhengzhou University from September 2020 to November 2021, with serum cardiac troponin I >0.03 ng/mL within 3 days after surgery as the diagnostic criteria for myocardial injury, the patients were divided into myocardial injury group with 51 patients and non-myocardial injury group with 41 patients. Related baseline data were collected for all patients, including age, sex, body mass index, American Society of Anesthesiologists classification, smoking history, alcohol abuse history, and preoperative comorbidities. The Mann-Whitney U test was used for comparison of continuous data between groups, and the chi-square test or the Fisher’s exact test was used for comparison of categorical data between groups. Univariate and multivariate logistic regression analyses were used to screen out the variables with statistical significance, and the factors screened out were used to establish a nomogram for predicting the risk of myocardial injury after Nano-Knife surgery in patients with pancreatic cancer. The receiver operating characteristic (ROC) curve and the area under the ROC curve (AUC) were used to evaluate the discriminatory ability and clinical utility of the model. Results Compared with the non-myocardial injury group, the myocardial injury group had a significantly longer ablation time (χ²=7.410, P=0.006), a significantly greater number of probes (χ²=6.130, P=0.047), and a significantly higher proportion of patients with preoperative hypertension (χ²=12.124, P<0.001) or chronic kidney disease (χ²=12.829, P<0.001). The univariate logistic regression analysis showed that tumor diameter, ablation time, surgical procedure, number of probes, history of hypertension, and history of chronic kidney disease were associated with the development of myocardial injury (all P<0.05), and the multivariate logistic regression analysis showed that tumor diameter (odds ratio [OR]= 3.94, 95% confidence interval [CI]: 1.09-14.18, P=0.036), ablation time (OR=4.15, 95%CI: 1.30-13.27, P=0.016), surgical procedure (OR=6.92, 95%CI: 1.92-25.07, P=0.003), and history of hypertension (OR=4.07, 95%CI:1.12-14.77, P=0.034) were independent risk factors for myocardial injury after Nano-Knife surgery in patients with pancreatic cancer. An AUC of 0.859 showed that the nomogram had good discriminatory ability and clinical utility. Conclusion There is a relatively high incidence rate of myocardial injury after Nano-Knife surgery in patients with pancreatic cancer. Preoperative hypertension, tumor diameter >4 cm, and ablation time >1 hour are independent risk factors for myocardial injury, and the surgical procedure of Nano-Knife surgery and bypass anastomosis can increase the risk of myocardial injury. The nomogram has a good effect in predicting the risk of myocardial injury. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

目的 探讨血清微小 RNA-106（miR-106）、C-C 基序趋化因子配体 2（CCL2）水平与糖尿病视网膜病变 （DR）微血管损伤的关系。方法 选择 2 型糖尿病患者 206 例，根据是否合并 DR 及其视网膜病变程度分为增殖性糖 尿病视网膜病变（PDR）56 例（PDR 组）、非增殖性糖尿病视网膜病变（NPDR）68 例（NPDR 组）、无糖尿病视网膜病变 （NDR）82 例（NDR 组）。采集所有研究对象清晨空腹肘静脉血，采用 RT-qPCR 法检测血清 miR-106，采用 ELISA 法检 测血清 CCL2、IL-6、TNF-α，采用流式细胞术检测外周血循环祖细胞（CPC）、内皮祖细胞（EPC）、循环内皮细胞（CEC）比 例，采用葡萄糖氧化酶法检测空腹血糖（FPG），采用乳胶凝集反应法检测糖化血红蛋白（HbA1c），通过口服葡萄糖耐量 试验检测餐后 2 h 血糖（2 h PG）。比较三组血清 miR-106、CCL2、IL-6、TNF-α 水平及外周血 CPC、EPC、CEC 比例，分析 DR 患者血清 miR-106、CCL2 水平与外周血 CPC、EPC、CEC 比例及血清 IL-6、TNF-α 水平的关系。采用多因素 Logistic 回归模型分析 2 型糖尿病患者进展至 DR 或 PDR 的影响因素。结果 与 NPDR 组、NDR 组比较，PDR 组血清miR-106 水平及外周血 CPC、EPC 比例显著降低，血清 CCL2、IL-6、TNF-α 水平及外周血 CEC 比例显著升高（P 均<0. 05）。与 NDR组比较，NPDR 组血清 miR-106 水平及外周血 CPC、EPC 比例显著降低，血清 CCL2、IL-6、TNF-α 水平及外周血 CEC 比例显著升高（P均 <0. 05）。DR 患者血清 miR-106 水平与外周血 CPC、EPC 比例呈正相关关系，与外周血CEC比例和 血清 IL-6、TNF-α水平呈负相关关系（P均 <0. 05）；血清 CCL2 水平与外周血 CPC、EPC 比例呈负相关关系，与外周血 CEC 比例和血清 IL-6、TNF-α 水平呈正相关关系（P均<0. 05）；血清 miR-106 水平与血清 CCL2 水平呈负相关关系（P< 0. 05）。多因素 Logistic 回归分析显示，CCL2 为 2 型糖尿病患者进展至 DR 或 PDR 的独立危险因素，而 miR-106 则为其 独立保护因素（P均<0. 05）。结论 DR 患者血清 miR-106 水平降低、血清CCL2 水平升高，二者可能通过炎症反应共同 参与 DR 微血管损伤；miR-106、CCL2 是 2 型糖尿病患者进展至 DR 或 PDR 的独立影响因素。 [ABSTRACT FROM AUTHOR]

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