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油基岩屑高温等离子体气化过程数值模拟研究

现代化工 2024年第2期44卷 227-232页

作者：吴徐磊于海龙张世锋陈海群徐亚运郑和常州大学石油与天然气工程学院江苏常州213164 常州大学石油化工学院江苏常州213164 中石化华东石油工程公司江苏钻井公司江苏南京210019

使用Aspen Plus软件中的Gibbs自由能平衡计算模块对油基岩屑的气化过程进行了物理建模和数值模拟研究,分析了等离子体炬功率、ER值和气化剂的流速等操作运行条件对气化效果的影响。确定了汽化过程最佳操作参数,体炬功率为25 kW,当量比为... 详细信息

使用Aspen Plus软件中的Gibbs自由能平衡计算模块对油基岩屑的气化过程进行了物理建模和数值模拟研究,分析了等离子体炬功率、ER值和气化剂的流速等操作运行条件对气化效果的影响。确定了汽化过程最佳操作参数,体炬功率为25 kW,当量比为0.3,气化过程应保证充足的氧气。

关键词：油基岩屑等离子体气化数值模拟 Aspen Plus

Investigation of migration of pollutant at the base of Suzhou Qizishan landfill without a liner system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第3期10卷 439-449页

作者： hai-jian XIE Yun-min chen Liang-tong ZHAN Ren-peng chen Xiao-wu TANG Ru-hai chen Han KE MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang University Hangzhou 310058 China College of Civil Engineering and Architeeture Zhejiang University Hangzhou 310058 China

We investigated migration of pollutant at the base of the Suzhou landfill after it had been operated for 13 years. The investigation was carried out by performing chemical analyses on the soil samples taken from the silty clay deposit. Concentrations of chloride, chemical oxygen demand （COD） and the heavy metals in the soil samples were determined using the standard methods. The experimental data showed that the maximum migration depth of chloride was more than 10 m, while the maximum migration depth of COD varied between 1 and 3.5 m. It is believed that the difference is attributed to the variation in diffusion rate and leachate-soil interaction. The chloride profiles also indicated that adveetion may be the dominant contaminant transport mechanism at this site. The total contents ofCu, Pb and Cr are very close to the background levels and the concentration values of these metals mainly are lower than the threshold values specified by the Chinese soil quality standard and the European one. The water-extractable concentrations of COD in the surface of the silty clay generally exceed the limit value specified by the Chinese standard. The concentrations of copper and chromium in pore water are 1-2 orders of magnitude less than the total concentrations of these heavy metals within the soils, implying that heavy metals are mainly adsorbed by the soil particles. Finally, remediation methods were suggested for this landfill site.

关键词： Uncontrolled landfill Field investigation Contaminant migration Soil contamination Heavy metals Organic contaminants Chloride

经皮椎弓根螺钉锚定式椎体强化术治疗无神经症状Kümmell病

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中国骨伤 2024年第5期37卷 470-476页

作者：陈松海叶林强周泽霖卢国樑广州中医药大学研究生院广东广州510405 广州中医药大学东莞医院广东东莞523000 广州中医药大学第一临床医学院广东广州510405

目的:探讨经皮椎弓根螺钉锚定式椎体强化术(percutaneous pedicle screw anchored vertebral augmentation,PPSAVA)治疗无神经症状Kümmell病的临床疗效。方法:回顾性分析2019年1月至2021年12月于采用PPSAVA治疗的20例无神经症状Kümmell病患者的临床资料,其中男5例,女15例,年龄56~88 (74.95±9.93)岁,病程7~60(21.35±14.46)d。记录手术时间、骨水泥注入量、骨水泥渗漏情况;比较术前、术后3d和末次随访时患者疼痛视觉模拟评分(visual analogue scale,VAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)、椎体角(vertebral body angle,VBA)、椎体前缘高度及椎体中线高度,末次随访时观察骨水泥松动、移位情况。结果:20例患者均顺利完成手术,手术时间30~56(41.15±7.65) min,骨水泥注入量6.0~12.0(9.30±1.49) ml。术中6例发生骨水泥渗漏,未出现明显临床症状。随访时间为6~12(8.43±2.82)个月。术后3 d及末次随访时的VBA、伤椎椎体前缘高度及伤椎椎体中线高度较术前明显改善(P0.05)。末次随访时未出现骨水泥松动、移位的情况。结论:PPSAVA治疗无神经症状Kümmell病可以有效改善患者的疼痛和功能障碍,降低术后骨水泥松动、移位风险。

关键词：经皮椎弓根螺钉经皮椎体强化术 Kümmell病骨水泥松动骨水泥移位

Effect of the medication injection site on treatment efficacy in pediatric cerebral palsy: conventional sites vs acupoints

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Journal of Traditional Chinese Medicine 2019年第5期39卷 716-721页

作者： Sun Yan chen hai Wu chengyan Teaching Office School of Rehabilitation MedicineHenan University of Chinese MedicineZhengzhou 450058China Prescription Traching and Research Section Institute of Literature in Chinese MedicineNanjing University of Chinese MedicineNanjing 210046China Prescription Traching and Research Section Institute of Literature in Chinese MedicineNanjing University of Chinese MedicineNanjing 210046China Department of Children's Rehabilitation The Third Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

OBJECTIVE: To analyze treatment effectiveness in terms of the medication injection site. METHODS: The medical records of 423 patients with cerebral palsy who were admitted to Maternal and Child Health Hospital between January 2009 and December 2016 were collected. All cases were divided into T1, T2, T3, and T4 groups based on the use of conventional medication sites and acupoints for administering injectable medicines. RESULTS: In the T1 group, patients received injections at conventional medication sites between 2009 and 2010. In the T2 group, patients received injections at conventional medication sites combined with acupoint injection therapy I from 2011 to 2012. In the T3 group, injection at conventional medication sites plus acupoint injection II was applied between 2013 and 2014. Acupoint injection only was used in the T4 group from 2015 to 2016. Therapeutic effects were statistically compared among the different injection procedures. The overall Gross Motor Function Measure (GMFM) and Fine Motor Function Measure (FMFM) scores were significantly improved after hospital discharge. The GMFM score was considerably higher in the T4 group than in the other groups (all P = 0.001 0.05). Meanwhile, the FMFM scores were significantly higher in the T2 and T4 groups than in the T1 and T3 groups (all P = 0.001 < 0.05). Site injection therapy can significantly improve gross and fine motor function in children with cerebral palsy. CONCLUSION: It is feasible to administer injectable medicines at acupoints instead of convention sites to enhance the therapeutic effect of treatment in patients with cerebral palsy.

关键词： Cerebral palsy Injections Acupuncture points Retrospective studies

内生性发展理论视域下乡村产业发展的实践进路——基于两镇果苗产业发展的分析

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安徽农业科学 2024年第9期52卷 235-240页

作者：缑文学陈海玲广西大学区域社会治理创新研究中心广西南宁530004 广西大学公共管理学院广西南宁530004

十九大以来,尤其是2020年消除绝对贫困以来,党和国家对乡村振兴战略的重视程度日渐提升。产业振兴作为乡村振兴的重要基础和关键,在发展中面临内生动力不足、内生主体发展能力有限、农民组织化程度较低及可持续发展能力欠缺等现实挑战... 详细信息

十九大以来,尤其是2020年消除绝对贫困以来,党和国家对乡村振兴战略的重视程度日渐提升。产业振兴作为乡村振兴的重要基础和关键,在发展中面临内生动力不足、内生主体发展能力有限、农民组织化程度较低及可持续发展能力欠缺等现实挑战。因此,基于内生性发展的理论视角,以农村精英为动力中心点,辐射带动普通农民,并适当借助政府等外生力量,在数量上形成“乡村产业内生主体的水花效应”;在质量上,以乡村精英带动内生主体的参与能力;然后再凝聚农村共同体意识以形成产业发展的合力;最后,坚持以绿色发展为新发展理念促进产业可持续发展。由此,不断激发乡村产业发展的内生动力,助推乡村产业由“供血式”发展向“造血式”发展转变,以期实现乡村产业的可持续发展,以产业振兴助推乡村振兴。

关键词：乡村产业内生性发展内生主体实践进路

An integrated pest management program for managing fusarium head blight disease in cereals

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Journal of Integrative Agriculture 2022年第12期21卷 3434-3444页

作者： chen A-hai Tofazzal ISLAM MA Zhong-hua State Key Laboratory of Rice Biology/Key Laboratory of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058P.R.China Institute of Biotechnology and Genetic Engineering(IBGE) Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh

Fusarium head blight(FHB)is a worldwide devastating disease of small grain cereals and Fusarium graminearum species complex(FGSC)is the major pathogen causing the *** epidemics of FHB lead to the reduction of grain yield and economic ***,mycotoxins produced by the FHB pathogens are hazardous to the health of human and *** this review,we summarize the epidemiology of FHB,and introduce effects of this disease on economy,environment and food *** focus on the integrated management approaches for controlling FHB including agronomic practices,resistant cultivars,chemical control,and *** addition,we also discuss the potential novel management strategies against FHB and mycotoxin.

关键词： fusarium head blight Fusarium graminearum integrated pest management program mycotoxins

MATHEMATICAL MODELING OF OIL SPILL ON THE SEA AND APPLICATION OF THE MODELING IN DAYA BAY

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Journal of Hydrodynamics 2007年第3期19卷 282-291页

作者： chen hai-zhou LI Da-ming LI Xiao School of Civil Engineering Tianjin University Tianjin 300072

Through the study of the theory of oil spill model, a mathematical modeling of oil spill on the sea is developed which with the consideration of spread, diffusion, drifting and attenuation of oil slick is influenced by evaporation and emulsification factors. A model that under the effect of ocean dynamic condition of tide, wind and wave, using Monte Carlo method to simulate the movement of oil slick is established. The modeling is applied to calculate and predict pollution range of oil spill at oil quay and oil ship in Daya Bay. The prediction results have basically shown the pollution situation by emergency of oil spill on the sea.

关键词： oil spill on the sea spread of oil slick diffusion of oil slick Monte Carlo method bay contamination

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船用起重机多绳系统同步运动控制策略

科学技术与工程 2024年第11期24卷 4591-4598页

作者：黄哲赵庭祺王生海程宏宇陈海泉韩广冬大连海事大学轮机工程学院大连116000

针对船用起重机在进行起升、变幅动作及受到外部扰动时,船用起重机多绳系统的减摇索之间无法实现同步运动的问题。首先建立了船用起重机多绳系统的运动学和动力学模型,接着提出了模糊PID(proportional,integral,derivative)控制策略,最... 详细信息

针对船用起重机在进行起升、变幅动作及受到外部扰动时,船用起重机多绳系统的减摇索之间无法实现同步运动的问题。首先建立了船用起重机多绳系统的运动学和动力学模型,接着提出了模糊PID(proportional,integral,derivative)控制策略,最后采用MATLAB/Simulink软件进行仿真分析。结果表明:在模糊PID控制策略下,多绳系统期望绳长与实际绳长的误差逐渐趋向于零,期望绳长速度与实际绳长速度的误差逐渐趋向于零,相比于传统的PID控制效果,模糊PID控制策略具有更高的鲁棒性。

关键词：船用起重机多绳系统模糊PID 动力学

A novel chronic nerve compression model in the rat

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Neural Regeneration Research 2018年第8期13卷 1477-1485页

作者： Zhen-Yu Liu Zhen-Bing chen Jiang-hai chen Department of Hand Surgery Union Hospital Tongji Medical College Huazhong University of Science and Technology

Current animal models of chronic peripheral nerve compression are mainly silicone tube models. However, the cross section of the rat sciatic nerve is not a perfect circle, and there are differences in the diameter of the sciatic nerve due to individual differences. The use of a silicone tube with a uniform internal diameter may not provide a reliable and consistent model. We have established a chronic sciatic nerve compression model that can induce demyelination of the sciatic nerve and lead to atrophy of skeletal muscle. In 3-week-old pups and adult rats, the sciatic nerve of the right hind limb was exposed, and a piece of surgical latex glove was gently placed under the nerve. N-butyl-cyanoacrylate was then placed over the nerve, and after it had set, another piece of glove latex was placed on top of the target area and allowed to adhere to the first piece to form a sandwich-like complex. Thus, a chronic sciatic nerve compression model was produced. Control pups with latex or N-butyl-cyanoacrylate were also prepared. Functional changes to nerves were assessed using the hot plate test and electromyography. Immunofluorescence and electron microscopy analyses of the nerves were performed to quantify the degree of neuropathological change. Masson staining was conducted to assess the degree of fibrosis in the gastrocnemius and intrinsic paw muscles. The pup group rats subjected to nerve compression displayed thermal hypoesthesia and a gradual decrease in nerve conduction velocity at 2 weeks after surgery. Neuropathological studies demonstrated that the model caused nerve demyelination and axonal irregularities and triggered collagen deposition in the epineurium and perineurium of the affected nerve at 8 weeks after surgery. The degree of fibrosis in the gastrocnemius and intrinsic paw muscles was significantly increased at 20 weeks after surgery. In conclusion, our novel model can reproduce the functional and histological changes of chronic nerve compression injury tha

关键词： nerve regeneration chronic nerve compression carpal tunnel syndrome nerve conduction velocity N-butyl-cyanoacrylate hypoesthesia demyelination remyelination intrinsic muscles collagen deposition axonal irregularity neural regeneration