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Advances in Manufacturing 2019年第2期7卷 238-247页

作者： Dong-Dong chen Yong-cheng Lin xiao-min chen School of Mechanical and Electrical Engineering Central South University Changsha 410083 People's Republic of China State Key Laboratory of High Performance Complex Manufacturing Changsha 410083 People's Republic of China College of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha 410114 People's Republic of China

In this study, a strategy based on the particle swarm optimization (PSO) algorithm is developed to control the microstructures of a Ni-based superalloy during hot forging. This strategy is composed of three parts, namely, material models, optimality criterions, and a PSO algo rithm. The material models are utilized to predict microstructure information, such as recrystallization volume fraction and average grain size. The optimality crite? non can be determined by the designed target microstructures and random errors. The developed strategy is resolved using the PSO algorithm, which is an intelligent optimal algorithm. This algorithm does not need a derivable objective function, which renders it suitable for dealing with the complex hot forging process of alloy components. The optimal processing parameters (deformation temperature and strain rate) are obtained by the developed strategy and validated by the hot forging experiments. Uniform and fine target microstructures can be obtained using the optimized processing parameters, which indicates that the developed strategy is effective for controlling the microstructural evolution during the hot forging of the studied superalloy.

关键词： Processing parameters Microstructure Particle swarm optimization (PSO) algorithm Superalloy

A new strategy to interpret OCT posterior pole asymmetry analysis for glaucoma diagnosis

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International Journal of Ophthalmology(English edition) 2017年第12期10卷 1857-1863页

作者： Yi Zhang Ni Li Jun chen Hong Wei Shan-ming Jiang xiao-min chen West China School of Medicine.Sichuan University Chengdu 610041Sichuan ProvinceChina Department of Ophthalmology West China HospitalSichuan UniversityChengdu 610041Sichuan Province China

AIM：To detect early glaucoma by optical coherence tomography（OCT） posterior pole asymmetry ***：Totally 39 eyes from 39 healthy subjects,40 eyes from 40 mild glaucoma patients,33 eyes from 33 moderate glaucoma patients and 41 eyes from severe glaucoma patients were included in this *** subjects underwent posterior pole asymmetry analysis（PPAA） of OCT and the posterior pole area was divided into three ***,standard deviations and 95% confidence intervals of each zone asymmetry in control group were *** thickness asymmetry（RTA） of different stage of glaucoma were compared for each zone,and receiver operating characteristic（ROC） curves were made to test the efficacy of strategies using different zones to discriminate glaucomatous eyes from the healthy ***：In a healthy population,RTA of the centre zone showed the minimal mean value（3.085 μm）,standard deviation（1.756）,and the narrowest 95% confidence interval（from 2.360 to 3.810 μm）.It was only in the center zone that RTA exhibited significant difference between control and moderate glaucoma group（P〈0.01）,as well as control and severe glaucoma group（P〈0.00001）.The strategy utilized in the center zone had the strongest diagnostic capability（zone 3 AUROC=0.816,P=0.0016） in comparison to that of the periphery area（zone 1 AUROC=0.675,P=0.0016;zone 2 AUROC=0.623,P=0.0197）,the whole posterior pole involved interpreting strategy showed inferior diagnostic power than the centre zone dependent strategy（z=2.851,P=0.0044）.CONCLUSION：Utilizing the posterior pole centre zone to interpret OCT PPAA results are more effective than making use of the whole posterior pole map.

关键词： glaucoma diagnosis optical coherencetomography posterior pole asymmetry analysis

Three-dimensional psychological guidance combined with evidencebased health intervention in patients with liver abscess treated with ultrasound

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World Journal of Clinical Cases 2022年第23期10卷 8196-8204页

作者： Ya-Nan Shan Ying Yu Yi-Han Zhao Lian-Lian Tang xiao-min chen Department of Infectious Diseases First Hospital of QinhuangdaoQinhuangdao 066000Hebei ProvinceChina Nursing Department First Hospital of QinhuangdaoQinhuangdao 066000Hebei ProvinceChina

BACKGROUND Liver abscess is a common clinical liver disease mainly caused by suppurative bacteria or amoebae,with early clinical signs of chills,high fever,jaundice,and other *** its early diagnosis is difficult,which may lead to *** To observe the effects of psychological guidance combined with evidence-based health intervention in patients with liver abscess treated with *** A total of 120 patients with bacterial liver abscess admitted to our hospital from May 2018 to February 2021 were selected and divided into groups according to their intervention *** After the intervention,Self-Rating Depression Scale,Self-Rating Anxiety Scale,Self-Perceived Burden Scale(SPBS),and quality of life scores(physical functioning,role physical,bodily pain,general health,vitality,social functioning,role emotional,mental health)were lower than before the intervention in the two *** observation group had lower negative sentiment,SPBS,and quality of life scores than the control *** the observation group,31 and 24 patients had good and general compliance,respectively,with a compliance rate of 91.67%,which was significantly higher than that in the control *** observation group had significantly lower total incidence of incision infection,abdominal abscess,hemorrhage,and severe abdominal pain than the control *** Three-dimensional psychological guidance combined with evidence-based health intervention in treating liver abscess can reduce patients’burden and negative emotions,improve patient compliance and quality of life,and reduce complications.

关键词： Three-dimensional psychological guidance Evidence-based health intervention Ultrasound intervention Liver abscess Negative emotions Compliance

A new species of the genus Girardia(Tricladida: Dugesiidae) from China

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Zoological Systematics 2015年第2期40卷 166-178页

作者： xiao-min chen Yu-Hui chen cheng-chen Wu An-Tai Wang College of Life Science Shenzhen Key Laboratory of Marine Bioresources and Ecology Institute of Nuclear Agricultural Sciences Zhejiang University

The genus Girardia （Tricladida： Dugesiidae） was recorded in China for the first time. A new freshwater turbellarian species, G. sinensis chen ＆ Wang, sp. nov., is described, which was collected from Xinghu Lake, Zhaoqing, Guangdong Province, China. Observation and analysis of the new species was conducted on morphology, habits, reproduction, histochemistry and molecular phylogenetics. In addition, the results indicated that morphological differences of AChE^＋ nerve structure can be used as a distinguishable character for species identification of Dugesiidae.

关键词： Planarian new species China biological characteristics phylogenetics.

Ankle-brachial index and brachial-ankle pulse wave velocity are risk factors for ischemic stroke in patients with type 2 diabetes

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Neural Regeneration Research 2017年第11期12卷 1853-1859页

作者： Ting Li Xiu-juan Wu xiao-min chen Si-bo Wang Kang-ding Liu Ying-qi Xing Neuroscience Center Department of Neurologythe First Hospital of Jilin UniversityChangchunJilin ProvinceChina

The incidence of ischemic stroke in patients with diabetes is increasing. While brachial-ankle pulse wave velocity （BaPWV） and ankle-bra- chial index （ABI） are known to be associated with ischemic cardiovascular and cerebrovascular diseases, whether these measures predict the risk of ischemic cerebrovascular disease in diabetic patients remains unclear. 117 patients with type 2 diabetes were enrolled in this study. According to the results of head magnetic resonance imaging, the patients were divided into a diabetes-only group （n = 55） and a diabetes and ischemic stroke group （n = 62）. We then performed ABI and BaPWV examinations for all patients. Compared with the diabe- tes-only group, we found decreased ABI and increased BaPWV in the diabetes and ischemic stroke group. Multivariate logistic regression analyses revealed that BaPWV and ABI were risk factors for ischemic stroke in patients with type 2 diabetes. Our findings indicate that decreased ABI and increased BaPWV are objective indicators of increased risk of ischemic stroke in patients with type 2 diabetes.

关键词： nerve regeneration brain injury ischemic stroke type 2 diabetes ankle-brachial index brachial-ankle pulse wave velocity magnetic resonance imaging low-density lipoprotein high-density lipoprotein transcranial Doppler ultrasonography carotid ultrasound scans neural regeneration

Post-dilatation improves stent apposition in patients with ST-segment elevation myocardial infarction receiving primary percutaneous intervention: A multicenter, randomized controlled trial using optical coherence tomography

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World Journal of Emergency Medicine 2020年第2期11卷 87-92页

作者： Jun Jiang Nai-liang Tian Han-bin Cui Chang-ling Li Xian-bao Liu Liang Dong Yong Sun xiao-min chen Shao-liang chen Bo Xu Jian-an Wang Department of Cardiology the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhouChina Department of Cardiology Nanjing First HospitalNanjingChina Department of Cardiology Ningbo First HospitalNingboChina Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseasesBeijingChina

BACKGROUND: Stent failure is more likely in the lipid rich and thrombus laden culprit lesions underlying ST-segment elevation myocardial infarction(STEMI).This study assessed the effectiveness of post-dilatation in primary percutaneous coronary intervention(pPCI) for acute ***: The multi-center POST-STEMI trial enrolled 41 consecutive STEMI patients with symptom onset 16 atm *** apposition and coverage were evaluated by optical coherence tomography(OCT) after intracoronary verapamil administration via thrombus aspiration catheter, post pPCI and at 7-month *** primary endpoint was rate of incomplete strut apposition(ISA) at 7 months after ***: There were similar baseline characteristics except for stent length(21.9 [SD 6.5] mm vs.26.0 [SD 5.8] mm, respectively, P=0.03).In post-dilatation *** group, ISA rate was lower(2.5% vs.4.5%, P=0.04) immediately after pPCI without affecting final TIMI flow 3 rate(95.2% vs.95.0%, P>0.05) or corrected TIMI frame counts(22.6±9.4 vs.22.0±9.7, P>0.05); and at 7-month follow-up(0.7% vs.1.8%, P<0.0001), the primary study endpoint, with similar strut coverage(98.5% vs.98.4%, P=0.63) and 1-year rate of major adverse cardiovascular events(MACE).CONCLUSION: In STEMI patients, post-dilatation after stent implantation and thrombus aspiration improved strut apposition up to 7 months without affecting coronary blood flow or 1-year MACE *** and longer term studies are warranted to further assess safety(Clinical *** identifier: NCT02121223).

关键词： ST-segment elevation myocardial infarction Post-dilatation Incomplete strut apposition Optical coherence tomography

Nonisospectral Lotka–Volterra Systems as a Candidate Model for Food Chain

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Annals of Applied Mathematics 2023年第3期39卷 281-322页

作者： xiao-min chen Xing-Biao Hu Institute of Applied Mathematics Department of MathematicsFaculty of ScienceBeijing University of TechnologyBeijing 100124China LSEC ICMSECAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we derive a generalized nonisospectral semi-infinite Lotka-Volterra equation,which possesses a determinant *** also give its a Lax pair expressed in terms of symmetric orthogonal *** addition,if the simplified case of the moment evolution relation is considered,that is,without the convolution term,we also give a generalized nonisospectral finite Lotka-Volterra equation with an explicit determinant ***,an application of the generalized nonisospectral continuous-time Lotka-Volterra equation in the food chain is investigated by numerical *** approach is mainly based on Hirota’s bilinear method and determinant techniques.

关键词： Nonisospectral Lotka-Volterra symmetric orthogonal polynomials food chains determinant techniques Hirota’s bilinear method

MODIFIED CLASSIC RISK FACTORS FOR CORONARY ARTERY DISEASE IN CHINESE HAN POPULATION

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Chinese Medical Sciences Journal 2007年第4期22卷 216-223页

作者： Han-bin Cui Sheng-huang Wang Dong-qi Wang Chang-cong Cui Xin-yi chen xiao-min chen Zheng Zhang Hong-kao Zhang Feng Bai Joseph B Muhlestein Department of Cardiology Shaanxi Provincial People＇s Hospital Xi＇an Jiaotong University Xi＇an 710068 Department of Cardiology Zhejiang Provincial Ningbo City Hospital Ningbo 315012 Department of Cardiology First Hospital of Xi＇an Jiaotong University Xi＇an 710061 Department of Cardiology First Hospital of Lanzhou Medical College Lanzhou 730000 Deoartment of Cardiology Hubei Provincial Shiyan City Hospital Shiyan 442000 Cardiology Center of LDS Hospital Salt Lake City 84132 USA

Objective To investigate the levels of cardiovascular disease risk factors and their relations to clinical phenotype associated with coronary artery disease(CAD).Methods The subjects were recruited from five independent cardiovascular *** angiography was employed to define the CAD with stenosis in each major vessel ≥70% and control with stenosis 0.05).The prevalence of low HDL-C(150 g/L) were 27.2% and 41.4%,*** serum levels of HDL-C and apolipoprotein A1 were significantly higher in female subjects than in male(P<0.001).Lower HDL-C functioned as an independent risk factor for CAD only in men(RR=2.8,95%CI:1.5-4.2,P<0.001),yet increased non-HDL cholesterol combined with diabetes mellitus and obesity seemed to play a key role in the development ofCAD in *** in risk association with CAD was found for hypertension and TC/HDL ratio in male and female subjects,while family history had no relationship with the presence of *** It is remarkable that emphasis of intervention in future should be given on the prevalent low serum HDL-C and its strong risk correlation wit

关键词： classic risk factors coronary artery disease high density lipoprotein cholesterol Chinese Han population

A new species of the genus Dugesia(Tricladida:Dugesiidae) from China

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Zoological Systematics 2015年第3期40卷 237-249页

作者： Yu-Hui chen xiao-min chen cheng-chen Wu An-Tai Wang College of Life Science Shenzhen Key Laboratory of Marine Bioresources and Ecology Institute of Nuclear Agricultural Sciences Zhejiang University

A new freshwater turbellarian species, Dugesia sinensis chen ＆ Wang, sp. nov., is described, which was collected from Caoxi rivulet, Shaoguan, Guandong Province, China. The morphology, reproduction, histochemical localization of AChE and phylogenetics based on COI gene of the new species was observed and analysed. The new species differs from its sister species in the developed diagram of the male atrium, the bursal canal to the left of the copulatory apparatus and distance （1 mm） between copulatory bursa and the mouth. In addition, the results indicated that morphological differences of ACHE＋ nerve structure can be used as a distinguishable character for species identification of genera Dugesiidae.

关键词： Flatworm Tricladida new species histochemistry nerve system phylogeny.

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存储测试装置聚氨酯灌封料减振特性研究

北京理工大学学报 2016年第10期36卷 1019-1024页

作者：鲁林李晓峰陈玟北京理工大学机电学院北京100081 北京理工大学机械与车辆学院北京100081

为研究聚氨酯封料的减振特性,通过霍普金森杆实验获得了不同密度聚氨酯材料的力学参数,对运用该参数进行的侵彻硬目标仿真获得的结果与空气炮实验测得数据进行了相关性计算,二者间具有较高的相关系数表明仿真模型及材料参数有效,在此基... 详细信息

为研究聚氨酯封料的减振特性,通过霍普金森杆实验获得了不同密度聚氨酯材料的力学参数,对运用该参数进行的侵彻硬目标仿真获得的结果与空气炮实验测得数据进行了相关性计算,二者间具有较高的相关系数表明仿真模型及材料参数有效,在此基础上,基于仿真数据和动力学模型进行了灌封后的测试体传递函数的辨识,分析了该传递函数的幅频特性,对不同密度聚氨酯灌封下的存储测试装置结构减振特性给出了定量评估.

关键词：聚氨酯本构参数霍普金森杆传递函数存储测试