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基于冷原子吸收分光光度法的热解析-低温等离子体脱汞技术研究

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光谱学与光谱分析 2018年第7期38卷 2279-2283页

作者：樊骅姚高扬刘伟邢子慧史金铭高柏陈扬东华理工大学水资源与环境工程学院江西南昌330013 上海市岩土工程检测中心上海200436 江西中煤建设集团有限公司江西南昌330001 中国铁路北京局集团有限公司北京100038 河北科技师范学院食品科技学院河北秦皇岛066004 中国科学院北京综合研究中心北京101407

研究含汞土壤的修复问题,采用热解析和低温等离子体综合技术探究新途径,调整温度、添加剂、时间等因素来判断脱汞效果并探究其不同形态,分析工艺过程废料的内部联系,并对废气处理进行分析实验。结论如下:(1)通过改良技术的BCR连续萃取法... 详细信息

研究含汞土壤的修复问题,采用热解析和低温等离子体综合技术探究新途径,调整温度、添加剂、时间等因素来判断脱汞效果并探究其不同形态,分析工艺过程废料的内部联系,并对废气处理进行分析实验。结论如下:(1)通过改良技术的BCR连续萃取法,得出研究区汞的形态主要为有机结合态(53%)。之后依次是氧化物结合态(33%)、酸可提取态(8%)、残渣态(6%)。(2)温度对热解析程度影响较大。在500℃以上的热解析条件下,土壤中的汞浓度不足1.5mg·kg^(-1)。(3)当选用400℃的解析温度时,40min汞去除总体完成。在低于1 700mg·kg^(-1)的浓度下,汞去除率随着土壤中的含量的增大而减小。(4)氯化钙对于热解析的促进作用最强,柠檬酸、升华硫也有一定作用,硫化钠对于汞去除形成阻滞。(5)低温等离子体的最佳状态是电源设置电压为22kV,频率为660Hz。整个系统的汞去除程度可达近90%。

关键词：汞热解析低温等离子体光谱分析土壤修复

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云南地区地壳磁异常与地质构造

地球物理学报 2017年第9期60卷 3493-3504页

作者：文丽敏康国发白春华高国明郑安燃安柏林云南大学地球物理系昆明650091

根据美国地球物理数据中心的地磁场模型(NGDC-720),研究云南地区地壳磁异常的空间变化,包括磁异常及其梯度的分布、磁异常随高度的衰减、不同波长成分对总体磁异常的贡献.比较磁异常与重力异常、大地热流、地震活动等地球物理信息的异... 详细信息

根据美国地球物理数据中心的地磁场模型(NGDC-720),研究云南地区地壳磁异常的空间变化,包括磁异常及其梯度的分布、磁异常随高度的衰减、不同波长成分对总体磁异常的贡献.比较磁异常与重力异常、大地热流、地震活动等地球物理信息的异同特征,探讨地壳磁异常与地质构造的关系.研究结果表明:丽江—小金河、红河断裂带以西的三江、滇西造山带的异常较弱,菱形地块的异常相对较强.研究区域的地壳磁异常主要是弱磁性基底背景下叠加的浅源磁性体产生.卫星磁异常显示滇中坳陷区具有清晰的偶极场特征.沿红河断裂带分布的正负磁异常带与断裂构造走向一致.围限菱形地块的丽江—小金河断裂、红河断裂、康定—奕良—水城断裂和弥勒—师宗—水城断裂带是磁异常的强弱过渡带.强烈地震发生的地点、大地热流值高的地区,地壳磁异常为负值或相对较弱.

关键词：地磁场模型地壳磁异常地质构造云南地区

Implementing Bandwidth-Satisfied Multicast of Overlay Network with Transport Layer Multihoming

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International Journal of Systems and Control

International Journal of Systems and Control 2007年第2期 107-117页

作者： Liu Jiemin, Cheng Shaohui, bai Xuesong,gao Yuan Department of Computer Science and Engineering Northeastern University at QinHuangDao, QinHuangDao, Hebei 066004,China

Using the emulated application of the bulk data transfer, we investigate existing overlay multicast schemes, we surprising find that all of them have a inherit performance limitation of overlay multicast caused by tansport layer singlehoming (e.g., TCP). The Layered Overlay Multicast Network based on Transport Layer Multihoming (LOMN-TLM) and the relevant scheme of Bandwidth-Satisfied Overlay Multicast (BSOM) we first present tries to reduce the limitation of existing scheme and to further improve the performance of overlay multicast. We also demonstrate that the scheme of Bandwidth-Satisfied Overlay Multicast with Transport Layer Multihoming outperforms others.

关键词： layered overlay multicast network transport layer multihoming bandwidth- satisfied overlay multicast (BSOM) multicast tree

Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming gao Zejia He Jia Zheng Hongming bai Jia-Sheng Rao Guiyun Song Wei Song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

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赣南地热气体起源的同位素与地球化学证据

地质科学 2014年第3期49卷 791-798页

作者：孙占学高柏张展适东华理工大学省部共建核资源与环境国家重点实验室培育基地南昌330013

对取自赣南地区10个温泉的地热气体进行了气体化学成分及氦、碳、氖同位素组成的分析。该区地热气体可分为CO_2型和N_2型两种类型。CO_2型地热气体分布在赣南东南部地区,主要成分是CO_2,占总体积96.47%以上,二氧化碳气体的δ^(13)C值为-... 详细信息

对取自赣南地区10个温泉的地热气体进行了气体化学成分及氦、碳、氖同位素组成的分析。该区地热气体可分为CO_2型和N_2型两种类型。CO_2型地热气体分布在赣南东南部地区,主要成分是CO_2,占总体积96.47%以上,二氧化碳气体的δ^(13)C值为-5.50‰^-3.49‰(PDB),平均为-4.66‰,为幔源无机成因;其氦同位素组成为1.36~2.27R_a,具有明显的幔源成因特征,最高约有28.2%的氦源于地幔;其N_2-Ar-He关系研究表明,该型地热气体中的氮源于地幔—地壳—大气混合成因。研究揭示该区CO_2型地热气体属幔源无机成因气,是地幔脱气作用的产物。N_2型地热气体分布在赣南西部地区,N_2含量占91.04%以上,其中二氧化碳气体的δ^(13)C值为-23.7‰^-12.6‰,平均为-17.82‰,为壳源有机成因;其氦同位素组成为0.06~0.13 R_a,具有明显的壳源放射性成因特征;~3He/~4He与~4He/^(20)Ne关系和He-Ar-N_2关系研究表明,N_2型温泉气主要来源于大气,并有壳源气体的贡献。

关键词：温泉地热气体稀有气体同位素碳同位素地球化学赣南

XRD和FTIR对Ce/γ-Al2O3除氟除砷的机理研究

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光谱学与光谱分析 2020年第9期40卷 2869-2874页

作者：张海阳高柏樊骅沈威林聪业东华理工大学核资源与环境国家重点试验室江西南昌330013 东华理工大学水资源与环境工程学院江西南昌330013 中国铁道科学研究院集团有限公司节能环保劳卫研究所北京100081

饮用水氟砷对公众健康造成的危害是一个全球性的环境问题,对于无集中供水的高氟砷地区显得尤为突出。与其他技术相比,固体表面吸附方法是一种操作简单、经济通用且效果可靠的除氟除砷的方法。尽管传统多孔吸附剂稳定廉价,但普遍吸附量不... 详细信息

饮用水氟砷对公众健康造成的危害是一个全球性的环境问题,对于无集中供水的高氟砷地区显得尤为突出。与其他技术相比,固体表面吸附方法是一种操作简单、经济通用且效果可靠的除氟除砷的方法。尽管传统多孔吸附剂稳定廉价,但普遍吸附量不高,难以满足实际需要,因此亟待研发廉价高效和操作流程简单的多孔吸附剂。使用最为广泛的γ-Al2O3表面存在较多—OH,接触液体具有电性,主要依靠表面吸附点位除氟除砷,导致其吸附效果有限。经过改性,吸附材料吸附过程复杂化,使其具有表面物理吸附和孔扩散等优点。稀土元素(Ce)是稀土中最多的元素,普遍用于催化剂和合金添加剂,其氧化物具有较高的吸附能力,但制备颗粒稀土氧化物工艺繁杂,并且使用过程中可能会产生脱落和金属溶出等问题。为了能够减少工艺程序并提高颗粒材料的吸附量,使用稀有金属盐浸渍法,避免复杂工艺流程带来的成本高、量产低等问题。故此创新性采用浸渍法制备铈盐Ce(SO4)2负载γ-Al2O3的多孔吸附材料,开展水溶液吸附特征试验,通过数据拟合得出吸附动力学模型和等温线模型,获得吸附过程及最大吸附量,给出Ce/γ-Al2O3吸附机理依据,通过测试SEM, XRD和FTIR,定性分析Ce/γ-Al2O3除氟除砷的吸附作用力,为Ce/γ-Al2O3提供可靠的吸附机理证据。结果表明:Ce/γ-Al2O3除氟除砷较符合拟二级动力学和Langmuir模型,除氟除砷最大吸附量分别可达47.842和18.518 mg·g^-1。Ce/γ-Al2O3表面光滑,负载良好,结合稳定。Ce(Ⅳ)被还原成Ce(Ⅲ),形成Ce-O-Al复合物, Ce/γ-Al2O3主体为非定型结构,有少量发育不完整晶粒结构存在,表面羟基健型稳定。XRD与FTIR相结合,反映出Ce/γ-Al2O3的物相结构及官能团种类,可用于Ce/γ-Al2O3的鉴定与分析,进一步验证吸附试验过程,体现吸附试验现象。γ-Al2O3经铈盐Ce(SO4)2浸渍法改进,造成Al—O健和Ce—O健、不完整晶粒的存在、表面孔径结构晶型结构的变化是Ce/γ-Al2O3吸附量提高的主控因素。

关键词：氟砷 Ce/γ-Al2O3 XRD FTIR

Marginal zone lymphoma with severe rashes: A case report

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World Journal of Clinical Cases 2024年第3期12卷 565-574页

作者： Si-Jun bai Ye Geng Yi-Nan gao Cai-Xia Zhang Qian Mi Chen Zhang Jia-Ling Yang Si-Jie He Zhen-YingYan Jian-Xia He Department of Hematology Shanxi Provincial People’s HospitalTaiyuan 030012Shanxi ProvinceChina

BACKGROUND Marginal zone lymphoma(MZL)is an indolent subtype of non-Hodgkin lymphoma(NHL),which is rare clinically with severe rashes as the initial *** SUMMARY This study reports a case of MZL with generalized skin rashes accompanied by pruritus and purulent ***-line treatment with rituximab combined with zanubrutinib had poor ***,after switching to obinutuzumab combined with zanubrutinib,the case was alleviated,and the rashes *** For patients with advanced stage MZL not benefiting from type I anti-CD20 monoclonal antibody(mAb)combination therapy,switching to a type II anti-CD20 mAb combination regimen may be *** approach may provide a new perspective in the treatment of MZL.

关键词： Marginal zone lymphoma Mucosa-associated lymphoid tissue Extranodal marginal zone lymphoma Primary cutaneous marginal zone lymphoma Rituximab,Obinutuzumab Zanubrutinib Case report

Spleen volume is associated with overt hepatic encephalopathy after transjugular intrahepatic portosystemic shunt in patients with portal hypertension

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2054-2064页

作者： Chun-Juan Zhao Chao Ren Zhen Yuan Guo-Hui bai Jin-Yu Li Long gao Jin-Hui Li Ze-Qi Duan Dui-Ping Feng Hui Zhang College of Medical Imaging Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Department of Radiology The First Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Department of Occupational Health School of Public HealthShanxi Key Laboratory of Environmental Health Impairment and PreventionNHC Key Laboratory of PneumoconiosisMOE Key Laboratory of Coal Environmental Pathogenicity and PreventionShanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Department of Oncological and Vascular Intervention The First Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Shanxi Provincial Clinical Research Center for Interventional Medicine The First Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina First Clinical Medical College Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Shanxi Key Laboratory of Intelligent Imaging and Nanomedicine The First Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Intelligent Imaging Big Data and Functional Nano-imaging Engineering Research Center of Shanxi Province The First Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina

BACKGROUND Portal shunt and immune status related to the spleen are related to the occurrence of hepatic encephalopathy(HE).It is unknown whether spleen volume before transjugular intrahepatic portosystemic shunt(TIPS)is related to postoperative *** To investigate the relationship between spleen volume and the occurrence of *** This study included 135 patients with liver cirrhosis who underwent TIPS,and liver and spleen volumes were elevated upon computed tomography *** Kaplan-Meier curve was used to compare the difference in the incidence rate of HE among patients with different spleen *** and multivariate Cox regression analyses were performed to identify the factors affecting overt HE(OHE).Restricted cubic spline was used to examine the shapes of the dose-response association between spleen volumes and OHE *** The results showed that 37(27.2%)of 135 patients experienced OHE during a 1-year follow-up *** with preoperative spleen volume(901.30±471.90 cm3),there was a significant decrease in spleen volume after TIPS(697.60±281.0 cm^(3))in OHE *** the severity of OHE increased,the spleen volume significantly decreased(P<0.05).Compared with patients with a spleen volume≥782.4 cm^(3),those with a spleen volume<782.4 cm^(3) had a higher incidence of HE(P<0.05).Cox regression analysis showed that spleen volume was an independent risk factor for post-TIPS OHE(hazard ratio=0.494,P<0.05).Restricted cubic spline model showed that with an increasing spleen volume,OHE risk showed an initial increase and then decrease(P<0.05).CONCLUSION Spleen volume is related to the occurrence of OHE after *** spleen volume is an independent risk factor for post-TIPS OHE.

关键词： Hepatic encephalopathy Transjugular intrahepatic portosystemic shunt Spleen volume Portal hypertension Cirrhosis

High-Resolution Structure-Property Studies of Nanomaterials by In-situ Transmission Electron Microscopy

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High-Resolution Structure-Property Studies of Nanomaterials ...