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Accurate Positioning Siamese Network for Real-Time Object Tracking

IEEE ACCESS 2019年 7卷 84209-84216页

作者： Zhou, Lijun Yao, xuwen zhang, Jianlin Chinese Acad Sci Inst Opt & Elect Key Lab Opt Engn Chengdu 610200 Sichuan Peoples R China Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 100049 Peoples R China Saarland Univ Sch Comp Sci D-66125 Saarbrucken Germany

Though end-to-end siamese networks have achieved great performance on object tracking owing to offline pre-training with large datasets. They are still liable to fail to track fast moving object and their accuracy suffers from the cosine window for mitigating background interference. The cosine window will aggravate the boundary effect and have a negative impact on track. In this paper, we propose an accurate positioning siamese network (FPSiam) for real-time object tracking. This approach can better estimate the search candidate area of the object in the current frame from the previous tracking position and can keep tracking well for the fast moving object. The unbalanced penalty mechanism of the cosine window in the tracking process is avoided. Furthermore, the features of the low-level layers are high-resolution, which is suitable for positioning the object. High-level layers are full of rich semantic features which are suitable for classifying the objects. In order to utilize the advantages of high-level features and low-level features, we introduce a densely connected tracking network. A number of experiments were conducted on five challenging tracking datasets: OTB50, OTB2013, OTB2015, VOT2015, and VOT2016, and the proposed method achieved excellent results on these benchmarks.

关键词： Optical flow object tracking real-time SiamFC

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Gestational diabetes mellitus prediction model: A risk factors analysis of pregnant women with gestational diabetes mellitus but have normal oral glucose tolerance test results in the second trimester of pregnancy

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TECHNOLOGY AND HEALTH CARE 2021年第1_suppl期29卷 S57-S63页

作者： Lu, Jiayu zhang, Song Jiang, Hongqing Yang, Lin Hao, Dongmei Yang, Yimin Li, xuwen Chen, Aiqing Shao, Jing Liu, Xiaohong Beijing Univ Technol Fac Environm & Life Sci Beijing Int Base Sci & Technol Cooperat Intelligent Physiol Measurement & Clin Translat Beijing 100124 Peoples R China Haidian Maternal & Children Hlth Hosp Beijing 100080 Peoples R China Beijing Yes Med Devices Co Ltd Beijing 100152 Peoples R China

BACKGROUND: Oral glucose tolerance test (OGTT) is a standard for the diagnosis of gestational diabetes mellitus (GDM). However, clinically, some cases with normal results were diagnosed as GDM in the third trimester. OBJECTIVE: To establish a risk model based on energy metabolism, epidemiology, and biochemistry that could predict the GDM pregnant women with normal OGTT results in the second trimester. METHODS: Qualitative and quantitative data were analyzed to find out the risk factors, and the binary logistic backward LR regression was used to establish the prediction model of each factor and comprehensive factor, respectively. RESULTS: The risk factors including the rest energy expenditure per kilogram of body weight, oxygen consumption per kilogram of body weight, if more than the weight gain criteria of the Institute of Medicine, the increase of body mass index between the second trimester and pre-pregnancy, and fasting blood glucose. By comparison, the comprehensive model had the best prediction performance, indicating that 85% of high-risk individuals were correctly classified. CONCLUSION: Energy metabolism, epidemiology, and biochemistry had better recognition ability for the GDM pregnant women with normal OGTT results in the second trimester. The addition of metabolic factors in the second trimester also improved the overall prediction performance.

关键词： Prediction model gestational diabetes mellitus rest energy metabolism

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Preparation and Properties of Pyrotechnic Binder Encapsulated α-AlH3 Composites by Solvent/Anti-solvent Method

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CHEMNANOMAT 2023年第5期9卷

作者： Shi, Zhe Lu, Taojie Hu, Yinghui Xu, Yidong Wang, xuwen Wu, Zhuo Zheng, Jian zhang, Jian Zhu, Zhaoyang Lin, Kaifeng Yang, Yulin Harbin Inst Technol Sch Chem & Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers & Harbin 150001 Peoples R China Hubei Inst Aerosp Chemotechnol Sci & Technol Aerosp Chem Power Lab Xiangyang 441003 Hubei Peoples R China China Aerosp Sci & Technol Corp 16 Fucheng Rd Beijing 100048 Peoples R China

Alpha-aluminum hydride (a-AlH3) is an ideal energetic combustion agent, but its poor stability and safety limit its application. Therefore, we prepare different composites by using the solvent/anti-solvent method to coat different pyrotechnic binders on the surface of a-AlH3. The vacuum stability test show that the minimum outgassing of Shellac-coated a-AlH3 composite is only 1.2 mL/g at 50 ? for 6 days. Due to the good electrical insulation properties of Viton, Viton-coated a-AlH3 composite have the highest E-50 value of electrostatic sensitivity. In addition, the pyrotechnic binders coating not only protects the activity of the a-AlH3 but also effectively increases its burning rate. Viton-coated a-AlH3 composite have more gaseous products and maximum flame area during combustion. This study illustrates that a-AlH3 coated with pyrotechnic binders is a means to address its stability and safety, laying the foundation for its application in solid propellants.

关键词： Pyrotechnic binder alpha-AlH3 Stability Safety Solid propellant

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A study of a fetal heart rate calculation system based on R-R interval

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TECHNOLOGY AND HEALTH CARE 2020年第S1期28卷 S187-S195页

作者： zhang, Yisong zhang, Song Yang, Lin Yang, Yimin Li, xuwen Hao, Dongmei Xu, Mingzhou Shao, Jing Beijing Univ Technol Coll Life Sci & Bioengn Intelligent Physiol Measurement & Clin Translat Beijing Int Base Sci & Technol Cooperat Beijing 100024 Peoples R China Beijing Aerosp ChangFeng Co Ltd Beijing 100071 Peoples R China Beijing Yes Med Devices Co Ltd Beijing 100152 Peoples R China

BACKGROUND: Fetal electrocardiogram (FECG) can be obtained in a non-invasive manner to monitor fetal growth status. OBJECTIVE: In this study, a fetal heart rate (FHR) calculation system was proposed, which consists of the FECG recorder (MF-HOLTER) and the FECG monitoring software (FECG-MS). The abdomen electrocardiogram (AECG) of pregnant woman is acquired through the MF-HOLTER. The FECG-MS packs the AECG data and calls the FECG separation algorithm to obtain the separated FECG and the fetal QRS (FQRS) position. The FHR is further obtained by calculating the R-R interval value. At the same time, this study proposed a FQRS position correction algorithm to calculate the correct FHR values. METHOD: In order to verify the accuracy of the FHR calculation, the ECG signal of FLUKE's PS320 FETAL SIMULATOR and clinical data were simultaneously tested. RESULTS: The accuracy rate is over 98% in processing the simulator's data. In processing clinical data, the FHR values obtained by both the system proposed in this study and Monica AN24 are very close, and the difference is less than 1 bpm. CONCLUSION: The results show that the FHR calculation system is accurate and stable, and has a positive application value and prospect.

关键词： Fetal ECG fetal heart rate R-R interval fetal QRS position correction

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高浊高黏矿井水井下绿色短流程处理关键技术

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洁净煤技术 2024年第S02期30卷 532-540页

作者：张建国王之峰何绪文赵磊张雪飞王绍州马文臣炼焦煤资源开发及综合利用国家重点实验室河南平顶山467000 中国平煤神马控股集团有限公司河南平顶山476000 世纪华扬环境工程有限公司北京100101 中国矿业大学(北京)化学与环境工程学院北京100083

通过聚瓷膜直滤技术处理高浊、高黏矿井水,验证聚瓷膜处理效果,优化工艺运行参数,摸索出相关工程化设计参数。小试结果表明,聚瓷膜耐污染膜材料和独特的流道设计可无需加药直滤处理高浊、高黏矿井水,且可耐受较高浓度悬浮物,不加药直滤... 详细信息

通过聚瓷膜直滤技术处理高浊、高黏矿井水,验证聚瓷膜处理效果,优化工艺运行参数,摸索出相关工程化设计参数。小试结果表明,聚瓷膜耐污染膜材料和独特的流道设计可无需加药直滤处理高浊、高黏矿井水,且可耐受较高浓度悬浮物,不加药直滤可避免药剂投加对深度处理单元的影响。膜污染主要以滤饼层堵塞为主并伴随中间堵塞,膜污染可通过化学清洗有效去除,化学清洗后膜恢复率可达95%以上。中试结果表明,因悬浮物被过滤器截流累积后黏度较大,会黏附到滤芯表面,预处理应优先选择带转刷的自清洗过滤器,聚瓷膜超滤系统最佳循环流量为24 m^(3)/h,最佳运行压力为0.2 MPa,进水浊度542~905 NTU时,产水浊度始终小于0.4 NTU,且系统运行稳定,可实现无人值守。井下工程实践表明,200 m^(3)/h规模的聚瓷膜直滤技术应用到井下后,无需复杂的预处理过程,且占地面积小、出水水质稳定达标、自动化程度高、运行费用低、产水效率高,电耗仅为0.37元/t(以水计),还可节省升井费用506.88万元/a,可实现矿井水处理绿色短流程、节能高效和智能化无人值守新要求,具有广阔的应用前景。

关键词：高浊高黏聚瓷膜直滤井下应用

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基于LabVIEW的白光干涉测量系统算法开发及软件设计

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机床与液压 2024年第5期52卷 156-160页

作者：朱靖丁斌毛敏张翔陈旭雯祖洪飞浙江理工大学机械工程学院浙江杭州310018 南通市计量检定测试所江苏南通226001 浙江谱麦科技有限公司浙江宁波315048 浙江龙宇智能科技有限公司浙江海宁314419

为全面实现白光干涉测量系统的搭建及应用,在硬件结构的基础上对软件系统进行了设计和开发。以LabVIEW图形化编程语言为开发工具,分别通过.NET控件、ActiveX控件与运动控制器和数据采集仪建立通信,实现对5个运动轴的协调控制及数据的实... 详细信息

为全面实现白光干涉测量系统的搭建及应用,在硬件结构的基础上对软件系统进行了设计和开发。以LabVIEW图形化编程语言为开发工具,分别通过.NET控件、ActiveX控件与运动控制器和数据采集仪建立通信,实现对5个运动轴的协调控制及数据的实时采集及分析处理。最后通过对标准环规的测试,验证了此软件不仅能精确高效地完成白光干涉测量系统的测试任务,其所输出的点云数据还可以进一步处理获得直径、圆柱度等形位公差信息。

关键词：白光干涉测量 LabVIEW 软件设计

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Tertiary lymphoid structures as potential biomarkers for cancer prediction and prognosis

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INTERNATIONAL IMMUNOPHARMACOLOGY 2024年 140卷 112790页

作者： zhang, Xin Yao, Jie Xie, Mei Liang, Yiran Lin, xuwen Song, Jialin Bao, Xinyu Ma, Xidong Wang, Yuanyong zhang, Yinguang Liu, Yiming Han, Wenya Pan, Lei Xue, Xinying Shandong Second Med Univ Sch Clin Med Weifang 261000 Shandong Peoples R China Capital Med Univ Beijing Shijitan Hosp Emergency & Crit Care Med Ctr Dept Resp & Crit Care Beijing 100038 Peoples R China Chinese Peoples Liberat Army Gen Hosp Dept Resp & Crit Care Beijing 100835 Peoples R China Air Force Mil Med Univ Tangdu Hosp Dept Thorac Surg Xian 710038 Shanxi Peoples R China Capital Med Univ Beijing Tiantan Hosp Dept Thorac Surg Beijing 100070 Peoples R China Hubei Univ Med Taihe Hosp Dept Resp & Crit Care Med Shiyan 442000 Peoples R China

Tertiary lymphoid structures (TLSs) are ectopic lymphocyte aggregates formed in non-lymphoid tissues, including cancers, and are loci for the generation of in situ anti-tumor immune responses, which play a crucial role in cancer control. The state of TLS presence in cancer and its composition can significantly impact the treatment response and prognosis of patients. TLSs have the potential to serve as predictive and prognostic biomarkers for cancer. However, the mechanisms underlying TLS formation in cancer and how the essential components of TLSs affect cancer are not fully understood. In this review, we summarized TLS formation in cancer, the value of the TLS in different states of existence, and its key constituents for cancer prediction and prognosis. Finally, we discussed the impact of cancer treatment on TLSs.

关键词： Tertiary lymphoid structure Cancer Prediction Prognosis Biomarker

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Analysis of the analgesic effects of tricyclic antidepressants on neuropathic pain, diabetic neuropathic pain, and fibromyalgia in rat models

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SAUDI JOURNAL OF BIOLOGICAL SCIENCES 2020年第9期27卷 2485-2490页

作者： Qin, Zhenlong Wang, Lei Li, Guoyan Qian, xuwen zhang, Jie Guo, Ying Liu, Guokai Beijing Univ Chinese Med Affiliated Hosp 3 Dept Anesthesiol Beijing 100029 Peoples R China Beijing Univ Chinese Med Dongzhimen Hosp Dept Anesthesiol 5 Haiyuncang Hutong Beijing 100700 Peoples R China

Objective: To investigate the analgesic effect of amitriptyline on neuropathic pain model rats, diabetic neuropathic pain model rats and fibromyalgia model rats. Methods: The healthy male Sprague wrote - Dawley (SD) rats were taken as the research object, and they were randomly divided into model group (group A), beside the sciatic nerve and injection of 5 mm amitriptyline group (group B), beside the sciatic nerve and injection of 10 mm amitriptyline group (group C), beside the sciatic nerve and injection of 15 mm amitriptyline group (group D), intraperitoneal injection of amitriptyline group (group E). Pain induced by selective injury of sciatic nerve branches in rats, pain induced by chronic compression of sciatic nerve, diabetic neuropathic pain and fibromyalgia were conducted to determine the pain threshold of mechanical stimulation in rats after drug administration. Results: The pain threshold of mechanical stimulation in the local amitriptyline group (group B, C, D) was significantly higher than that in the group A and group E at each time point after drug treatment, and the pain threshold of mechanical stimulation gradually increased with the increase of concentration. There was no statistically significant difference in mechanical stimulation pain threshold between group A and group E at each time point after drug treatment. Conclusion: Para-sciatic injection of amitriptyline at different concentrations has analgesic effects on neuropathic pain, diabetic neuropathic pain and fibromyalgia in rat models, and amitriptyline directly ACTS on the local sciatic nerve. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.

关键词： Tricyclic antidepressants Rat model Neuropathic pain Diabetic neuropathic pain Fibromyalgia

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润房镜联合普拉洛芬滴眼液对白内障术后中重度干眼症的疗效分析

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中国现代医学杂志 2023年第1期33卷 95-98页

作者：高立祁涛许文彬张瑞帆崇州市人民医院眼耳鼻喉科四川崇州611230 四川省人民医院眼科四川成都610072

目的探讨润房镜联合普拉洛芬滴眼液对白内障术后中重度干眼症的疗效。方法选取2020年3月—2021年8月崇州市人民医院收治的108例白内障术后中重度干眼症患者,采用随机数字表法分为对照组(采用普拉洛芬滴眼液治疗)和联合组(采用润房镜+... 详细信息

目的探讨润房镜联合普拉洛芬滴眼液对白内障术后中重度干眼症的疗效。方法选取2020年3月—2021年8月崇州市人民医院收治的108例白内障术后中重度干眼症患者,采用随机数字表法分为对照组(采用普拉洛芬滴眼液治疗)和联合组(采用润房镜+普拉洛芬滴眼液治疗),每组54例。比较两组患者的泪膜破裂时间(BUT)、泪液分泌试验(SIT)、眼表疾病指数(OSDI)、角膜荧光素染色评分(FL)、临床疗效、视觉质量及不良反应。结果联合组治疗前后BUT、SIT的差值高于对照组(P <0.05)。联合组治疗前后OSDI、FL评分的差值高于对照组(P <0.05)。联合组总有效率高于对照组(P <0.05)。联合组与对照组治疗期间不良反应总发生率比较,差异无统计学意义(P>0.05)。结论润房镜联合普拉洛芬滴眼液治疗白内障术后中重度干眼症可改善临床症状,提高临床疗效和视觉质量,且安全可靠。

关键词：白内障干眼症润房镜普拉洛芬滴眼液疗效

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消音缝结构对75Cr1材质圆锯片旋转状态下振动特性的影响

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工具技术 2024年第10期58卷 75-82页

作者：秦绪文王玉奇王继荣白硕玮张华辰青岛大学机电工程学院

在锯片基体设计消音缝结构是75Cr1材质圆锯片重要的减振降噪方式。为研究消音缝加工位置对旋转状态下75Cr1材质圆锯片振动特性的作用机理,构建了考虑离心应力影响的75Cr1材质圆锯片模态仿真模型,分别探究了在其基体内部和边缘加工消音... 详细信息

在锯片基体设计消音缝结构是75Cr1材质圆锯片重要的减振降噪方式。为研究消音缝加工位置对旋转状态下75Cr1材质圆锯片振动特性的作用机理,构建了考虑离心应力影响的75Cr1材质圆锯片模态仿真模型,分别探究了在其基体内部和边缘加工消音缝对旋转模态振型以及固有频率的影响。结果表明:加工基体消音缝后,不易产生驻波共振,模态的固有频率发生分离;加工边缘消音缝后,部分模态振型的阶次顺序发生改变,不利于动态稳定性的模态振型阶次后移;基体内部消音缝的模态分离作用较强,边缘消音缝的模态分离作用较弱。本研究结论对制锯企业面向不同工作转速需求的消音缝优化设计具有一定指导意义。

关键词：圆锯片消音缝离心应力振动特性分析

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