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Strong interference suppression for subspace judgment analysis

Chinese Journal of Acoustics 2024年第1期43卷 49-63页

作者： SHENG Xueli LI Dewen CAO Ran yin jiarui ZHOU Xuan National Key Laboratory of Underwater Acoustic Technology Harbin Engineering UniversityHarbin 150001 College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001 Qingdao Innovation and Development Base Harbin Engineering UniversityQingdao 266000

When strong interferences are present in underwater environments, the performance of target of interest(TOI) bearing estimation algorithms can be significantly degraded. To address this problem, an interference suppression method for subspace judgment(SSJ) is proposed, which aims to achieve TOI-bearing estimation in the presence of multiple strong interferences. With prior knowledge of the TOI bearing interval, the proposed method builds a judgment item using the correlation between the TOI-interferencenoise subspace and steering vector. The eigenvectors that are not dominated by the TOI are accurately identified via comparison with the estimated judgment threshold. And the identified eigenvectors will be subtracted from the sample covariance matrix(SCM) for interference suppression. The proposed method can obtain a residual SCM that primarily contains the signal of the TOI. It reduces the output power of interference and acquires TOI with a higher signal-to-interference plus noise ratio(SINR), which provides methodical support for improving the capability of TOI-bearing resolution. Simulation and experimental data processing results demonstrate that the proposed method effectively suppresses strong interferences outside TOI-bearing intervals. It reduces the output power of interference and sidelobe levels while improving the capability of TOI-bearing resolution. Compared with other interference suppression methods with subspace, the proposed method has a more robust interference suppression capability.

关键词： interferences estimation Strong

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子空间判决分析的强干扰抑制

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声学学报 2023年第6期48卷 1119-1127页

作者：生雪莉李德文曹然尹家瑞周璇哈尔滨工程大学水声技术全国重点实验室哈尔滨150001 哈尔滨工程大学水声工程学院哈尔滨150001 哈尔滨工程大学青岛创新发展基地青岛266000

针对海洋中存在的强干扰和环境噪声导致水下目标方位估计算法性能剧烈下降的问题,提出了一种子空间判决分析的强干扰抑制方法(SSJ),可实现多个强干扰下的目标方位估计。根据常规波束形成粗估的目标角度区间,利用目标-干扰-噪声子空间与... 详细信息

针对海洋中存在的强干扰和环境噪声导致水下目标方位估计算法性能剧烈下降的问题,提出了一种子空间判决分析的强干扰抑制方法(SSJ),可实现多个强干扰下的目标方位估计。根据常规波束形成粗估的目标角度区间,利用目标-干扰-噪声子空间与导向矢量的相关性,设置判决项和估计合适的判决阈值来分离和抑制样本协方差矩阵中的非目标信息,降低干扰和噪声的输出功率,同时提高输出信干噪比,为增强阵列的目标方位分辨能力提供方法支撑。仿真和海试数据处理结果显示,SSJ方法可抑制目标角度区间外的强干扰和噪声,明显降低了干扰的输出功率和目标主瓣附近的旁瓣级,提高了目标方位角度的分辨力。相比于现有的子空间干扰抑制方法,所提方法具有更加稳健的干扰抑制能力。

关键词：子空间判决判决项判决阈值干扰抑制

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Cell polarization in ischemic stroke: molecular mechanisms and advances

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Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei Li Xiaoxiao Xu Xuan Wu jiarui Li Shiling Chen Danyang Chen Gaigai Li Zhouping Tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke

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Application of the improved dung beetle optimizer,muti-head attention and hybrid deep learning algorithms to groundwater depth prediction in the Ningxia area,China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 18-23页

作者： jiarui Cai Bo Sun Huijun Wang Yi Zheng Siyu Zhou Huixin Li Yanyan Huang Peishu Zong Collaborative Innovation Center on forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina China Meteorological Administration Key Laboratory of Transportation MeteorologyNanjingChina Jiangsu Meteorological Observatory NanjingChina

Due to the lack of accurate data and complex parameterization,the prediction of groundwater depth is a chal-lenge for numerical *** learning can effectively solve this issue and has been proven useful in the prediction of groundwater depth in many *** this study,two new models are applied to the prediction of groundwater depth in the Ningxia area,*** two models combine the improved dung beetle optimizer(DBO)algorithm with two deep learning models:The Multi-head Attention-Convolution Neural Network-Long Short Term Memory networks(MH-CNN-LSTM)and the Multi-head Attention-Convolution Neural Network-Gated Recurrent Unit(MH-CNN-GRU).The models with DBO show better prediction performance,with larger R(correlation coefficient),RPD(residual prediction deviation),and lower RMSE(root-mean-square error).Com-pared with the models with the original DBO,the R and RPD of models with the improved DBO increase by over 1.5%,and the RMSE decreases by over 1.8%,indicating better prediction *** addition,compared with the multiple linear regression model,a traditional statistical model,deep learning models have better prediction performance.

关键词： Groundwater depth Multi-head attention Improved dung beetle optimizer CNN-LSTM CNN-GRU Ningxia

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从傣锦织造技艺看女性主体构建的民族文化表征

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服装学报 2023年第4期8卷 350-356页

作者：桂宇阴佳芮昆明学院美术与艺术设计学院云南昆明650214 华南师范大学创意设计学院广东汕尾516600

通过文献梳理与田野调查,从傣锦的技艺传承、构造类别、艺术特征3个方面探讨傣锦技艺中“女主男辅”的合作方式、“圣俗二元”的文化表征以及朴实无华的审美意识。研究表明,傣锦作为一种传承千年的民族民间服饰工艺,其制作材料取自傣族... 详细信息

通过文献梳理与田野调查,从傣锦的技艺传承、构造类别、艺术特征3个方面探讨傣锦技艺中“女主男辅”的合作方式、“圣俗二元”的文化表征以及朴实无华的审美意识。研究表明,傣锦作为一种传承千年的民族民间服饰工艺,其制作材料取自傣族人民生活的自然环境,其纹样取形于世代所居的生活场景,其工艺取法于家中女性的代际传承,呈现的艺术观念取意于族群精神生活与宗教信仰,是以手工织造为媒介、女性为传承主体构建的民族文化表征,对其研究有助于实现文化价值的再生。

关键词：傣锦织造技艺女性主体民族文化表征

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髋膝置换手术患者预防应激性溃疡现状分析

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中国药师 2018年第10期21卷 1813-1816页

作者：毛璐殷佳蕊张竞北京积水潭医院药剂科北京100035 大兴区人民医院药剂科北京积水潭医院矫形骨科

目的:调查我院矫形骨科关节置换患者预防应激性溃疡用药现状,探讨髋膝置换患者预防消化道溃疡出血的必要性。方法:调阅我院2017年9月出院的髋膝置换病例,统计患者的年龄,性别,合并内科基础疾病,相关检验指标、预防应激性溃疡药物及围手... 详细信息

目的:调查我院矫形骨科关节置换患者预防应激性溃疡用药现状,探讨髋膝置换患者预防消化道溃疡出血的必要性。方法:调阅我院2017年9月出院的髋膝置换病例,统计患者的年龄,性别,合并内科基础疾病,相关检验指标、预防应激性溃疡药物及围手术期止疼和抗凝药物使用情况。结果:共收集109例,其中髋关节置换40例,膝关节置换69例,患者年龄中位数为63岁,非甾体镇痛抗炎药物(NSAIDs)使用率为98. 16%,术后预防深静脉血栓药物使用率为95. 4%,预防应激性溃疡药物使用率为67. 9%,所有患者住院期间均未出现消化道出血。结论:髋膝置换手术患者绝大多数为老年人,膝关节置换的患者年龄更高,而髋关节置换手术时间更长出血更多,围手术期普遍使用非甾体抗炎药物和预防深静脉血栓药物。目前该类人群是否常规需要预防应激性溃疡尚无定论,但联合使用阿司匹林及NSAIDs,是明确需要预防的危险因素。其他高危因素,以及预防用药的必要性,有待进行更大规模的调研。

关键词：关节置换术应激性溃疡预防合理用药

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HPLC法测定瘀血痹颗粒中丹酚酸B、羟基红花黄色素A、姜黄素和齐墩果酸含量

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中国临床药学杂志 2024年第2期33卷 131-135页

作者：崔健李海萍殷佳蕊北京市大兴区人民医院药剂科北京102600

目的建立一种可用于瘀血痹颗粒中丹酚酸B、羟基红花黄色素A、姜黄素和齐墩果酸含量测定的HPLC法。方法采用Shimadzu CLC-ODS C_(18)色谱柱;以乙腈(流动相A)-0.3%磷酸溶液(流动相B)为流动相,程序洗脱;测定波长:丹酚酸B为286 nm,羟基红花... 详细信息

目的建立一种可用于瘀血痹颗粒中丹酚酸B、羟基红花黄色素A、姜黄素和齐墩果酸含量测定的HPLC法。方法采用Shimadzu CLC-ODS C_(18)色谱柱;以乙腈(流动相A)-0.3%磷酸溶液(流动相B)为流动相,程序洗脱;测定波长:丹酚酸B为286 nm,羟基红花黄色素A为403 nm,姜黄素为430 nm,齐墩果酸为205 nm;体积流量1.0 mL·min^(-1);柱温30℃;进样体积:10μL。结果丹酚酸B、羟基红花黄色素A、姜黄素和齐墩果酸分别在质量浓度0.0966~9.6600、0.1258~12.5800、0.0981~9.8100、0.9580~95.8000μg·mL^(-1)内具有良好的线性,平均回收率分别为99.89%、100.39%、99.94%和100.01%,RSD值分别为0.60%、0.99%、1.01%和0.71%。结论该方法适用于瘀血痹颗粒制剂的质量控制。

关键词： HPLC 瘀血痹颗粒丹酚酸B 羟基红花黄色素A 姜黄素齐墩果酸

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Long-term operation optimization of circulating cooling water systems under fouling conditions

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Chinese Journal of Chemical Engineering 2024年第1期65卷 255-267页

作者： jiarui Liang Yong Tian Shutong Yang Yong Wang Ruiqi yin Yufei Wang School of Chemical Engineering and Environment China University of PetroleumBeijing102249China CHN Energy Xinjiang Chemical Co. LTDUrumqi830092China College of Mechanical and Transportation Engineering China University of PetroleumBeijing 102249China

Fouling caused by excess metal ions in hard water can negatively impact the performance of the circulating cooling water system(CCWS)by depositing ions on the heat exchanger's ***,the operation optimization of CCWS often prioritizes short-term flow velocity optimization for minimizing power consumption,without considering ***,low flow velocity promotes ***,it's crucial to balance fouling and energy/water conservation for optimal CCWS long-term *** study proposes a mixed-integer nonlinear programming(MINLP)model to achieve this *** model considers fouling in the pipeline,dynamic concentration cycle,and variable frequency drive to optimize the synergy between heat transfer,pressure drop,and *** optimizing the concentration cycle of the CCWS,water conservation and fouling control can be *** model can obtain the optimal operating parameters for different operation intervals,including the number of pumps,frequency,and valve local resistance *** experiments on cycle and environmental temperature reveal that as the cycle increases,the marginal benefits of energy/water conservation *** periods with minimal impact on fouling rate,energy/water conservation can be achieved by increasing the cycle while maintaining a low fouling ***,the proposed model has significant energy/water saving effects and can comprehensively optimize the CCWS through its incorporation of fouling and cycle optimization.

关键词： Computer simulation Circulating water system Fouling Concentration cycle Optimization Variable frequency drive

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《民法典》视域下隔代探望权的理论逻辑、适用困境与纾解进路

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四川文理学院学报 2025年第1期35卷 83-90页

作者：李佳瑞四川师范大学法学院四川成都610011

隔代探望权虽然在司法实践中得到大力支持,但由于缺乏立法层面的认可,法官大多援引基本原则进行自由裁量,权利申请主体、行使方式、中止条件和权利救济等问题缺乏统一定论,导致同案不同判现象时常发生。需要在遵循“儿童利益最大化”原... 详细信息

隔代探望权虽然在司法实践中得到大力支持,但由于缺乏立法层面的认可,法官大多援引基本原则进行自由裁量,权利申请主体、行使方式、中止条件和权利救济等问题缺乏统一定论,导致同案不同判现象时常发生。需要在遵循“儿童利益最大化”原则下,通过明确隔代探望权的行使主体和行使方式,细化隔代探望权的中止条件及增设隔代探望权的配套救济制度的方式积极回应社会需求,维护未成年人成长利益和家庭关系的和谐稳定。

关键词：隔代探望权最有利于未成年人祖父母制度设计

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Preparation and application of gallium-based conductive materials in the very recent years

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Science China(Technological Sciences) 2021年第4期64卷 681-695页

作者： WANG XinPeng GUO jiarui HU Liang Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100191China

Gallium and its alloys are a group of metallic materials with low-melting points at or around room *** from the good electrical conductivity,the unique liquid state endows those metals with excellent compliance and self-healing capacity,which present great value in the development of flexible and stretchable *** by the high surface tension and low viscosity,however,liquid metals cannot be applied to some common microelectronics manufacturing technologies such as micro-electro mechanics in the preceding years,which impedes their mass production in electronic *** address these issues and broaden the applications of liquid metals in electronics devices,numerous efforts have been taken and great progress has been made especially in the very recent *** review summaries the recent development of liquid metal-based conductive materials from the aspects of preparation or modification methods and their accommodative fabrication techniques in flexible electronic *** outlook including expectations and challenges of liquid metal-based conductive materials are also presented.

关键词： liquid metal conductive materials fabrication techniques flexible electronics

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