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5th International Symposium on IT in Medicine and Education, ITME 2013

作者： Caihong, Yu Ying, huang Dongyao, Xu xuwen, He Jianbing, Wang Yan, Yu 100083 Beijing China

ISBN: (纸本)9789400776173

In recent years, the environmental engineering of China university of mining and technology (Beijing) specialty carried out a series of reforms, aimed to improve the students' practical experience of innovative ability. This paper explores the practice teaching system of environmental engineering by combining with that practical experience. It is on the basis of the spirit that "Constructing energy industry elite education teaching system actively and explore diversified personnel training mode", which was put forward by our school. In addition, this paper also introduces the measures to integrate the advantage of research with the discipline's in environmental engineering, to highlight energy professional advantages of our school, to build practice teaching link in the field of coal disposal and to cultivate environmental professional elite talent. © Springer Science+Business Media Dordrecht 2014.

关键词： Personnel training

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Research on sound source localization based on sound sensor 4

Research on sound source localization based on sound sensor

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4rth International Conference on Applied Mathematics, Modelling, and Intelligent Computing, CAMMIC 2024

作者： Jin, Hailei Wang, xuwen huang, Kun Xiong, Xiaomin Zhang, Minshu Li, Jiang Xinyu Power Supply Branch of State Grid jiangxi Power Co. Ltd. Xinyu338000 China Shanghai University of Electric Power Shanghai200090 China

ISBN: (纸本)9781510681637

Nowadays, most of the 10 kV distribution network cable lines are laid underground in the form of direct burial or casing, and the cable is cut off by the construction machinery, resulting in the accident of line tripping. In the construction of urban construction, third-party external forces such as manual excavation, mechanical excavation and illegal invasion will cause serious damage to underground cables. Therefore, it is of great engineering application value to develop cable marking piles with sound source localization function and find the location of damage points in time. In order to improve the accuracy and effectiveness of positioning, but also to achieve rapid positioning of the source of damage, this paper is based on the sound sensor, using its flexibility, efficiency and timeliness, by controlling the number and location of the sound sensor, combined with the sound intensity to locate the sound source. At the same time, the sound sensor is connected with the number and position of the marking pile, and the traditional cable marking pile is improved to accurately locate the damage source in time. © 2024 SPIE.

关键词： Excavation

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Fatty Infiltration of Multifidus Muscles: An Easily Overlooked Risk Factor for the Severity of Osteoporotic Vertebral Fractures

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ORTHOPAEDIC SURGERY 2024年第3期16卷 585-593页

作者： Xu, Wuyan Liu, Xiaowen Wu, Li Liang, Shaohua Zhang, Ye huang, Junbing Zeng, xuwen Li, Siming Xu, Fan Xiong, Yuchao Jinan Univ Dept Radiol Guangzhou Red Cross Hosp Guangzhou Peoples R China Jinan Univ Dept Orthoped Guangzhou Red Cross Hosp Guangzhou Peoples R China Jinan Univ Clin Med Coll 2 Shenzhen Peoples R China Jinan Univ Guangzhou Red Cross Hosp Dept Radiol Guangzhou 510220 Peoples R China

ObjectivesOsteoporotic vertebral fractures (OVFs) are a critical public health concern requiring urgent attention, and severe OVFs impose substantial health and economic burdens on patients and society. Analysis of the risk factors for severe OVF is imperative to actively prevent the occurrence of this degenerative disorder. This study aimed to investigate the risk factors associated with the severity of OVF, with a specific focus on changes in the paraspinal *** total of 281 patients with a first-time single-level acute OVF between January 2016 and January 2023 were enrolled in the study. Clinical and radiological data were collected and analyzed. The cross-sectional area (CSA) and degree of fatty infiltration (FI) of the paraspinal muscles, including the multifidus muscles (MFMs), erector spinae muscles (ESMs), and psoas major muscles (PSMs), were measured by magnetic resonance imaging (MRI) of the L4/5 intervertebral discs. According to the classification system of osteoporotic fractures (OF classification) and recommended treatment plan, OVFs were divided into a low-grade OF group and a high-grade OF group. Univariate and multivariate logistic regression analyse s were performed to identify risk factors associated with the severity of ***-eight patients were included in the low-grade OF group, and 183 patients were included in the high-grade OF group. Univariate analysis revealed a significantly higher incidence of a high degree of FI of MFMs (OR = 1.71, p = 0.002) and ESMs (OR = 1.56, p = 0.021) in the high-grade OF group. Further multivariate logistic regression analysis demonstrated that a high degree of FI of the MFMs (OR = 1.71, p = 0.002) is an independent risk factor for the severity of *** high degree of FI of the MFMs was identified as an independent risk factor for the severity of OVF. Decreasing the degree of FI in the MFMs might lower the incidence of the severity of OVF, potentially reducing the necessity for s

关键词： Fatty Infiltration Osteoporosis Multifidus Muscles Osteoporotic Vertebral Fracture

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Prediction of Subsequent Vertebral Fracture After Acute Osteoporotic Fractures from Clinical and Paraspinal Muscle Features

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CALCIFIED TISSUE INTERNATIONAL 2024年第6期114卷 614-624页

作者： Xiong, Yuchao Zhang, Cici Chen, Xiaopei Wu, Li Liang, Shaohua Zhang, Ye huang, Junbing Guo, Wei Zeng, xuwen Xu, Fan Jinan Univ Guangzhou Red Cross Hosp Dept Radiol Guangzhou Peoples R China

To construct a nomogram based on clinical factors and paraspinal muscle features to predict vertebral fractures occurring after acute osteoporotic vertebral compression fracture (OVCF). We retrospectively enrolled 307 patients with acute OVCF between January 2013 and August 2022, and performed magnetic resonance imaging of the L3/4 and L4/5 intervertebral discs (IVDs) to estimate the cross-sectional area (CSA) and degree of fatty infiltration (FI) of the paraspinal muscles. We also collected clinical and radiographic data. We used univariable and multivariable Cox proportional hazards models to identify factors that should be included in the predictive nomogram. Post-OVCF vertebral fracture occurred within 3, 12, and 24 months in 33, 69, and 98 out of the 307 patients (10.8%, 22.5%, and 31.9%, respectively). Multivariate analysis revealed that this event was associated with percutaneous vertebroplasty treatment, higher FI at the L3/4 IVD levels of the psoas muscle, and lower relative CSA of functional muscle at the L4/5 IVD levels of the multifidus muscle. Area under the curve values for subsequent vertebral fracture at 3, 12, and 24 months were 0.711, 0.724, and 0.737, respectively, indicating remarkable accuracy of the nomogram. We developed a model for predicting post-OVCF vertebral fracture from diagnostic information about prescribed treatment, FI at the L3/4 IVD levels of the psoas muscle, and relative CSA of functional muscle at the L4/5 IVD levels of the multifidus muscle. This model could facilitate personalized predictions and preventive strategies.

关键词： Osteoporosis Compression fracture Paraspinal muscles Fat infiltration Nomograms

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壳聚糖及其衍生物对土壤重金属的稳定化效应

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化工进展 2019年第9期38卷 4308-4319页

作者：宋俊颖何绪文黄占斌中国矿业大学(北京)化学与环境工程学院

随着工业的发展,特别是采矿冶炼等行业的发展,使含重金属的废弃物进入土壤,造成土壤重金属污染,对环境和人体健康产生极大威胁。本文以湖南怀化某铅锌矿渣堆放地周围污染土壤为研究目标,通过壳聚糖及其衍生物对污染土壤中重金属离子的... 详细信息

随着工业的发展,特别是采矿冶炼等行业的发展,使含重金属的废弃物进入土壤,造成土壤重金属污染,对环境和人体健康产生极大威胁。本文以湖南怀化某铅锌矿渣堆放地周围污染土壤为研究目标,通过壳聚糖及其衍生物对污染土壤中重金属离子的稳定化实验,筛选出对目标重金属(Cd^2+、Pb^2+、Zn^2+)具有最佳稳定效果的稳定剂,探究了稳定剂对土壤中重金属离子的稳定机理,并在模拟酸雨淋溶条件下研究了最佳稳定剂对重金属离子的长期稳定化效果。稳定化实验结果表明,壳聚糖及其衍生物对土壤重金属离子均有稳定化作用,其中羧甲基壳聚糖的稳定效果最好,其使污染土壤中重金属离子的可迁移性及生物有效性明显降低。通过重金属形态分析、扫描电镜(SEM)及X射线衍射(XRD)分析得出稳定剂与土壤中重金属离子发生反应生成络合物,并通过机理分析进一步验证了羧甲基壳聚糖的稳定效果最好;淋溶实验表明,羧甲基壳聚糖对土壤中重金属离子具有长期稳定性,经其稳定后土壤中重金属离子以更稳定不易迁移的形态存在,且使土壤环境得到改善,增强了土壤本身对重金属离子的稳定。羧甲基壳聚糖有望成为修复重金属(Cd^2+、Pb^2+、Zn^2+)污染土壤的优良稳定剂。

关键词：土壤重金属壳聚糖及其衍生物固定化淋溶污染修复

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Step-Controlled Povarov-Type Reaction with 1,2-Dihydroquinolines as Precursors of Dienophiles: Direct Synthesis of Spirocyclic Bi-tetrahydroquinolines and Functionalized 1,2-Dihydroquinolines

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ORGANIC LETTERS 2017年第1期19卷 58-61页

作者： Ren, xuwen Li, Guangxun huang, Jin Wang, Weidong Zhang, Yongpo Xing, Guomin Gao, Chunyan Zhao, Gang Zhao, Jinzhong Tang, Zhuo Shanxi Agr Univ Taigu Coll Art & Sci Jinzhong 030800 Shanxi Peoples R China Chinese Acad Sci Chengdu Inst Biol Nat Prod Res Ctr Chengdu 610041 Sichuan Peoples R China Sichuan Univ Coll Chem Engn Chengdu 610041 Sichuan Peoples R China

A novel Povarov-type reaction for straightforward synthesis of novel spiro bi-tetrahydroquinolines with readily available 1,2-DHQs (1,2-dihydroquinolines) and aromatic imines was developed. The reaction could be selectively stopped at the first stage under a Bronsted acid catalyst to afford the corresponding functionalized 1,2-DHQs conveniently.

关键词： QUINOLINE synthesis CHEMICAL reactions CHEMICAL precursors DIENOPHILES SPIRO compounds synthesis

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China / 1st ed.

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2012年

作者： Chefredaktion: Zhou Mingwei Zhang Yanbin huang Youyi Deutsche ?bersetzung: Luan xuwen Li Xia...

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钢渣-灰岩人工湿地去除生活污水中的氮素

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水处理技术 2011年第9期37卷 109-112页

作者：黄玲何绪文华北科技学院北京101601 中国矿业大学(北京) 北京100083

构建小试系统研究了钢渣-灰岩人工湿地对生活污水中氮素的去除效果,分析了填料填铺方式和表层填料对湿地去除生活污水氮素效果的影响,并建立了钢渣-灰岩人工湿地转化氮素的数学模型。结果表明,当原水平均氨氮、TN的质量浓度分别为257.7... 详细信息

构建小试系统研究了钢渣-灰岩人工湿地对生活污水中氮素的去除效果,分析了填料填铺方式和表层填料对湿地去除生活污水氮素效果的影响,并建立了钢渣-灰岩人工湿地转化氮素的数学模型。结果表明,当原水平均氨氮、TN的质量浓度分别为257.7和398.4 mg.L-1时,钢渣-灰岩垂直潜流人工湿地出流氨氮和TN的质量浓度可分别降至13.57和62.83 mg.L-1;大级配差的正反粒径混合填铺的填料结构和渗透性良好的表层填料更有利于钢渣-灰岩人工湿地降解氮素效果;钢渣-灰岩垂直潜流人工湿地处理系统对氮素的去除规律较好符合1级反应动力学方程。

关键词：人工湿地生活污水氮钢渣灰岩

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Delays in routine childhood vaccinations and their relationship with parental vaccine hesitancy: a cross-sectional study in Wuxi, China

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EXPERT REVIEW OF VACCINES 2022年第1期21卷 135-143页

作者： Wang, Qiang Xiu, Shixin Yang, Liuqing Han, Ying huang, Jinxin Cui, Tingting Shi, Naiyang Liu, Minqi Wang, xuwen Lu, Bing Jin, Hui Lin, Leesa Southeast Univ Sch Publ Hlth Dept Epidemiol & Hlth Stat 87 Dingjiaqiao Nanjing 210009 Peoples R China Southeast Univ Sch Publ Hlth Key Lab Environm Med Engn Minist Educ Nanjing Peoples R China Wuxi Ctr Dis Control & Prevent Dept Immunizat Planning Wuxi Jiangsu Peoples R China London Sch Hyg & Trop Med Dept Infect Dis Epidemiol London England Hong Kong Sci Pk Lab Data Discovery Hlth D24H Hong Kong Peoples R China

Objectives This study aimed to examine childhood vaccination delay, explore the association between vaccination delay and parental vaccine hesitancy, and assess childhood vaccination delays during the coronavirus disease (COVID)-19 pandemic in China. Methods This cross-sectional survey was conducted in Wuxi City. Participants were recruited from local vaccination clinics. Questionnaires were used to collect information about socio-demographics, vaccine hesitancy, and immunization clinic evaluations. Vaccination records were obtained from the Jiangsu Information Management System of Vaccination Cases. Results Overall, 2728 participants were included. The coverage for seven category A vaccines (Expanded Program on Immunization (EPI)) was more than 95% at 24 months. The proportion of children vaccinated in a timely manner was the highest for the first dose of the hepatitis B vaccine (91.6%) and the lowest for the Bacillus-Calmette-Guerin vaccine (44.6%). More than 50% of the planned vaccinations were delayed in February and March 2020. The Vaccine Hesitancy Scale scores were not associated with vaccination delay (P = 0.842). Children's vaccination delays were negatively associated with parents who reported convenient access to clinics and satisfaction with immunization services (P = 0.020, P = 0.045). Conclusions EPI is highly successful in China. Despite vaccination delays due to the COVID-19 pandemic, coverage was recovered after lockdown restrictions were eased.

关键词： Childhood vaccination delay timeliness vaccine hesitancy COVID-19 pandemic

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Numerical Simulation and Process Optimization on Hot Twist-Stretch Straightening of Ti-6Al-4V Alloy Profile

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MATERIALS 2022年第13期15卷 4522-4522页

作者： Deng, xuwen Hui, Songxiao Ye, Wenjun Liu, Rui huang, Liang GRINM Grp Co Ltd State Key Lab Nonferrous Met & Proc Beijing 100088 Peoples R China GRIMAT Engn Inst Co Ltd Beijing 101407 Peoples R China Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China

Ti-6Al-4V profiles prepared by hot extrusion are usually accompanied by bending and twisting. The hot twist-stretch straightening is an effective strategy such that the bending deflection and twisting angle can be simultaneously decreased by a single straightening process. In addition, utilizing stress relaxation effect, the residual stress and springback can be greatly reduced by holding the straightening temperature and strain constant for a period after twist-stretch straightening. In this study, the hot deformation behaviors of the Ti-6Al-4V profile were revealed by experiments. The tensile model was obtained by uniaxial tensile tests within ranges of temperatures (500-700 degrees C) and strain rates (5 x 10(-5)-1 x 10(-3) s(-1)). The creep constitutive model was acquired with stress relaxation experiments in ranges of temperatures (500-700 degrees C) and pre-strain of 1.5%. Then, the coupled thermo-mechanical model of hot twist-stretch straightening was established. Based on orthogonal experiment strategy, the effects of straightening temperature, stretch strain, and holding time on the bending deflection and torsion angle of profile were investigated systematically and the process was optimized. The straightening accuracy is significantly affected by straightening temperature and holding time. By using optimized process parameters in practical straightening experiments, the deflection/length and angle/length after straightening does not exceed 2 parts per thousand and 2.5 parts per thousand degrees/mm, respectively, which is basically consistent with the numerical simulation result.

关键词： Ti-6Al-4V profile hot twist-stretch straightening orthogonal experiment thermo-mechanical coupling model

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