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随着新型电力系统的大力建设与推广，火电机组面临的调频压力增大，提出一种逐次变分模态分解的飞轮-火电一次调频控制策略。首先，以飞轮储能和火电机组为研究对象，建立考虑新能源占比的飞轮-火电一次调频模型；其次，将一次调频功率指令利用逐次变分模态方法分解，由火电机组响应分解后的低频功率指令，同时设计飞轮储能下垂优化控制方法，实现飞轮储能与火电机组响应频率变化的协同控制；最后在不同工况下仿真验证，结果表明所提策略可有效避免火电机组一次调频时的频繁出力，减小火电机组响应频率变化时的调控要求，同时可最大限度地利用飞轮储能调频容量并保证飞轮储能调频期间的运行安全，进一步提升了系统的频率响应能力。

柔性直流输电技术是实现弱电网条件下大规模新能源送出的有效技术手段。对于以柔性直流输电系统作为唯一输电通道的大规模新能源集群，必须通过有功控制系统保障送端换流站运行在其可行PQ范围内。在分析其越限风险和控制需求的基础上，提出了激进型和保守型两种有功控制策略，并引入超短期预测作为分群指标以提高动态发电指标再分配的准确性。在此基础上提出了基于时序生产模拟的大规模新能源集群有功控制裕度确定方法，并以张北柔直电网及其汇集新能源为例进行了仿真分析。结果表明，激进型有功控制策略需要预留更大的控制裕度，但是对于发电空间的利用更加充分，新能源场站利用小时数更高。研究结果对于指导张北柔直电网送端新能源集群有功控制及安全裕度设置有参考意义。

为提高智能变电站通信网络的运维水平,文章提出了一种基于分块矩阵的报文传输路径查找算法。为了把智能变电站通信网络静态配置信息抽象为数学模型,建立了物理网络拓扑矩阵模型和逻辑网络拓扑矩阵模型,并构建了两者之间的映射关系,给出了报文路径查找算法的流程。针对矩阵法分析网络拓扑计算量大的问题,文章提出以分块矩阵技术为主,稀疏矩阵与对称矩阵技术辅助优化的算法。采用遗传算法将网络矩阵模型分为对应的多个子矩阵,采用稀疏矩阵和对称矩阵技术处理子矩阵。通过对实际智能变电站的网络分析,与邻接算法相比,此算法不仅可以查找报文的转发路径,而且计算速度快占用内存空间少。

目的 探究海绵窦区硬脑膜动静脉瘘（cavernous sinus dural arteriovenous fistula，CS-DAVF）不同入路介入治疗策略的安全性和效果。 方法 检索空军军医大学第二附属医院神经外科血管病中心前瞻性血管病数据库，回顾性分析2013年1月—2022年12月所有尝试介入治疗的CS-DAVF患者的相关资料，包括一般资料、临床症状体征、影像学资料、手术相关信息以及患者预后与转归，并对资料进行汇总和分析。 结果 共71例CS-DAVF患者接受介入治疗，其中54例（76.1%）以眼部症状为主，包括视力下降、结膜水肿、眼球突出、活动受限、眼睑下垂等。66例（93.0%）患者成功完成了手术，其中采取静脉入路栓塞40例（60.6%），动脉入路栓塞21例（31.8%），动静脉联合入路栓塞5例（7.6%）。使用弹簧圈联合Onyx胶29例（43.9%），单纯使用Onyx胶36例（54.5%），单纯使用弹簧圈1例（1.5%）。栓塞术后即刻DSA显示达到完全闭塞57例（86.4%），次全闭塞9例（13.6%）。单因素logistic回归分析结果显示，手术入路[校正OR（adjusted OR，aOR）3.854，95%CI 0.821～18.101，P=0.087＜0.1]和Onyx胶联合弹簧圈（aOR 8.282，95%CI 0.972～70.617，P=0.053＜0.1）与治愈率临界相关。19例（28.8%）出现手术相关并发症，其中15例新发眼部症状或眼部症状加重，2例面部感觉异常，2例发生肢体活动的神经功能障碍。单因素logistic回归分析结果显示，手术并发症与各种影响因素无相关性。65例（98.5%）完成1年临床随访，其中19例出现手术相关并发症的患者16例症状完全消失，2例好转，1例失随访，其余患者除1例仍有复视外原有症状均完全消失。40例（60.6%）患者接受了DSA影像随访，均未复发。 结论 CS-DAVF介入治疗中静脉入路相较于动脉入路更具优势，岩下窦入路可作为首选，采用静脉入路和Onyx胶联合弹簧圈栓塞与治愈率临界相关。其疗效是可观的，虽然部分患者出现并发症，但绝大部分患者均为一过性手术并发症，可以获得满意的临床效果。 Abstract: Objective To explore the safety and efficacy of interventional therapy of cavernous sinus dural arteriovenous fistulas (CS-DAVF) with different approaches and strategies. Methods Retrieve the prospective vascular disease database of the Vascular Disease Center, Department of Neurosurgery, The Second Affiliated Hospital of Air Force Medical University. Data from all patients with CS-DAVF who attempted interventional therapy from January 2013 to December 2022 were retrospectively analyzed. All information including patients’ general data, clinical symptoms and signs, imaging data, surgical information, and follow-up results were collected. The data was summarized and analyzed. Results A total of 71 patients with CS-DAVF attempted interventional therapy. Among them, 54 cases (76.1%) presented with ocular symptoms as the main sign, including decreased vision, chemosis, exophthalmos, limited movement, and ptosis. Sixty-six patients (93.0%) successfully completed the operation, with transvenous approach in 40 cases (60.6%), transarterial approach in 21 cases (31.8%), and combined arteriovenous approach in five cases (7.6%). Onyx was combined with coil in 29 cases (43.0%), Onyx alone in 36 cases (54.5%), and coil alone in one case (1.5%). DSA immediately after embolization showed complete occlusion in 57 cases (86.4%) and subtotal occlusion in nine cases (13.6%). Univariate logistic regression analysis showed that surgical approach [adjusted OR (aOR) 3.854, 95%CI 0.821-18.101, P=0.087＜0.1] and Onyx combined with coil (aOR 8.282, 95%CI 0.972-70.617, P=0.053＜0.1) were related to the critical cure rate. Surgery-related complications occurred in 19 patients (28.8%), among of them, 15 were with new or worsened exist ocular symptoms, two were with facial paresthesia, and two were with neurological dysfunction affecting limb movement. Univariate logistic regression analysis results showed that surgical complications were not correlated with various influencing factors. Sixty-five patients (98.5%) completed one-year clinical follow-up. Among the 19 patients with surgical complications, 16 cases completely disappeared, two cases improved, one case lost follow-up, and the original symptoms of the remaining patients completely disappeared except for one case who still had diplopia. Forty patients (60.6%) were followed up with DSA, and no recurrence was reported. Conclusions The transvenous approach is more advantageous than the transarterial approach in the interventional therapy of CS-DAVF, and the inferior petrosal sinus approach can be the first choice. The use of transvenous approach and Onyx combined with coil is related to the critical cure rate. The efficacy is considerable. Although some patients have complications, the majority of patients are transient surgical complications, and satisfactory clinical efficacy can be obtained.

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Chengdu-Chongqing Economic Circle is an important growth pole for high-quality development in western China, which needs the coordinated development of vocational education and rural industry, so as to promote the integrated development of urban and rural areas, and accelerate the construction of modern vocational education system. Vocational education is the propeller of the coordinated development of rural industries in Chengdu-Chongqing economic circle. However, the deviation of fit degree is the practical dilemma of the coordinated development of vocational education in Chengdu-Chongqing economic circle. In order to promote the high quality development of Chengdu-Chongqing economic circle, we must strengthen the overall coordination and break through the mechanism barriers, strengthen the planning guidance and promote the integration of industry and education in the whole region, strengthen policy support, promote cooperation in depth and other aspects of efforts, so as to strengthen the coordinated development of vocational education and rural industries. [ABSTRACT FROM AUTHOR]

To on-line monitor the process variables of different components in solid state fermentation of wheat bran by spectral technology, the contents of protein, water, total phenol and crude fiber in 61 wheat bran solid fermented feed were measured based on Chinese national standard metheds. The near infrared spectrum and Fourier transform infrared spectrometer of the samples was collected and analyzed. The spectra was performed with 9 different preprocessing methods, such as standard normal variate transformation (SNV), multiplicative scatter correction (MSC) and smoothing (SG). NIR and FT-IR quantitative models of feed nutrients were established and compared by partial least squares (PLS). The results showed that the Rc² and Rp² were both great than 0.8, root mean square error of cross validation (RMSECV) was less than 2.0, root mean square error of calibration (RMSEC) and root mean square error of prediction (RMSEP) were less than 1.0, respectively. NIR and FT-IR quantitative analysis models have good stability. The process parameters of solid-state fermentation of wheat bran were rapidly monitored by NIR and FT-IR is feasible. [ABSTRACT FROM AUTHOR]

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Component-based software system is a system whose core is structure design. Determining the possible weak components of the system and eliminating the potential dangers in the design stage are of great significance to ensure the quality of the software system and reduce the waste and loss of resources caused by blind development. In this paper, two system parameters, total number of system faults and detection rate of system faults are defined for the software system whose component reliability follows the G-O model, and two system parameter estimation models based on the corresponding component parameters are established. On this basis, a method to determine the weak components of the system is given, and the effectiveness of the proposed method is verified by simulation. This method can prejudge the components that are most likely to be detected faults in the test or operation environment. Therefore, it has reference value for assisting software designers to determine weak components and optimize structure design. [ABSTRACT FROM AUTHOR]

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