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A new method to determine composition of sphalerite without secondary pollution based on CIELAB color space

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SusMat 2023年第5期3卷 671-681页

作者： Yong Liu Ning Duan Linhua Jiang Hongping He han Cheng Jiaqi Liao Yanli Xu wen Cheng ying Chen Guangbin zhu Fuyuan Xu School of Materials Science and Engineering Anhui University of Science&TechnologyHuainanAnhuiChina State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghaiChina Shanghai Institute of Pollution Control and Ecological Security ShanghaiChina College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenChina School of Environmental Science and Engineering Tianjin UniversityTianjinChina

Currently,most of the methods formineral materials analysis generate secondary pollution,which is detrimental to human *** instance,traditionalmethods for sphalerite analysis in the zinc(Zn)smelting industry including chemical titration,atomic absorption spectrometry,and inductively coupled atomic emission *** indicators and toxic heavy metals are used in the analytical processes,causing severe *** some methods,liquid is transformed into gaseous plasma,which is more dangerous to human *** to large quantities of sphalerite being used,secondary pollution cannot be *** study proposes a green analysis method for the detection of sphalerite based on colorimetry,which does not generate secondary *** results show that the strong substitution ability of iron(Fe)for Zn contributes to their inverse correlation in *** lattice parameters decrease with the increasing Fe content,resulting in a darker ***,key colorimetry parameters of L*,a*,and b*show clear linear correlations with the Zn and Fe *** with traditional approaches,this new method is environmental friendly with high sensitivity and *** relative error and relative standard deviation were less than 10%and 5%,*** study provides a significant reference for nonpollution determination of other mineral materials.

关键词： analytical method for sphalerite CIELAB colorimetry no secondary pollution original state detection

^(124)I的制备、抗体标记及标记化合物的Micro-PET/CT显像

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同位素 2024年第4期37卷 387-393页

作者：侯兴国王风丁缙朱华杨志北京大学肿瘤医院暨北京市肿瘤防治研究所核医学科国家药监局放射性药物与评价重点实验室恶性肿瘤发病机制及转化研究教育部重点实验室北京100142

为使用医用回旋加速器生产^(124)I及研究^(124)I标记提供方法,本研究通过124Te(p,n)^(124)I核反应制备^(124)I,首先压制得到124TeO_(2)/Al_(2)O_(3)靶片,利用回旋加速器轰击3~8 h后,放置12 h去除副反应产生的杂质核素,最后通过碘升华-... 详细信息

为使用医用回旋加速器生产^(124)I及研究^(124)I标记提供方法,本研究通过124Te(p,n)^(124)I核反应制备^(124)I,首先压制得到124TeO_(2)/Al_(2)O_(3)靶片,利用回旋加速器轰击3~8 h后,放置12 h去除副反应产生的杂质核素,最后通过碘升华-放化分离法得到Na^(124)I溶液。分析Na^(124)I的纯度并且标记抗间皮素(mesothelin,MSLN)抗体后,对KM小鼠进行尾静脉注射观察^(124)I-anti-MSLN的分布。结果显示,压制得到的124TeO_(2)/Al_(2)O_(3)靶片经过12.5 MeV能量,20μA质子束轰击后得到340.4~1121.1 MBq核素产品,经纯化后得274.2~758.5 MBq高纯度Na^(124)I溶液,其放射性浓度>54840 Bq/μL。使用该Na^(124)I溶液对抗MSLN抗体标记得到放化纯度>99%的^(124)I-anti-MSLN探针,经尾静脉注射入KM小鼠体内,通过Micro-PET/CT显像可以观察到小鼠甲状腺部位有明显的探针摄取,且该摄取可以被提前3 d喂食0.5%KI溶液阻断,代谢行为符合^(124)I标记的抗体探针在KM鼠体内的代谢规律。本研究总结了25次^(124)I的制备过程中涉及的设备、方法及纯化后Na^(124)I的使用等情况,结果表明,经过纯化得到的^(124)I具有较高的核纯度和化学纯度,满足放射性标记的需求,且平均回收率高于70%,自动纯化过程安全可靠。

关键词：固体靶核素碘-124 碲-124靶片 ^(124)I自动纯化系统 Micro-PET/CT

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Research on Analytical Method of Fatigue Characteristics of Soft Yoke Mooring System Based on Full-Scale Measurement

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China Ocean Engineering 2017年第2期31卷 230-237页

作者： WU wen-hua LV Bai-cheng YUE Qian-jin ZhanG Yan-tao LIN Yang Department of Engineering Mechanics State key Laboratory of Structural Analysis of Industrial EquipmentDalian University Tianjin Branch CNOOC

By focusing on the vulnerability of the structure of marine equipments, together with considering the randomness of meta-ocean load in statistics, a kind of analytical method of fatigue characteristics of marine structure based on full- scale and actual measurement of prototype is proposed. On the basis of short-term field measurement results of structural response, research is carried out on the fatigue analysis of hinge joints at the upper part of the Soft Yoke single point Mooring System （SYMS） by simultaneously monitoring the environmental load and considering the design criteria of offshore structure. Through analysis of finite element modeling, the time-histories of typical stress response are obtained, and then the assessment of fatigue damage at key hinge joints is conducted. The simulation results indicate that the proposed method can accurately analyze the fatigue damage of offshore engineering structure caused by the effect of wave load. The present analytical method of fatigue characteristics can be extended on other offshore engineering structures subjected to meta-ocean load.

关键词： fatigue characteristics full scale measurement finite element method SYMS

Sequential embolization of the branches of the bile duct and portal vein to the targeted hepatic lobe in rats

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Hepatobiliary & Pancreatic Diseases International 2014年第1期13卷 55-59页

作者： Anuj Shrestha Yong Zhou Hui Mao Fu-Yu Li wen-Jie Ma Nan-Sheng Cheng Ri-hua Xu Yong-Qiong Zhang Ting Jiang huan Feng wen Li Qiang han Department of Hepatobiliary Surgery West China Hospital of Sichuan University Department of Medicine West China Hospital of Sichuan University

BACKGROUND: The high recurrence rate of hepatolithiasis and the high operative risk of right posterior, caudate or multiple lobe hepatectomy are the unsettled problems in hepatobiliary surgery. The present study was to investigate the efficacy of chemical hepatectomy performed via applying sequential embolization of the branches of the bile duct and portal vein to the targeted hepatic lobe. METHODS: The bile duct and portal vein branches of the median hepatic lobe of rats were treated with: 1) bile duct embolization followed by portal vein ligation(BDE+PVL) and 2) portal vein ligation followed by bile duct embolization(PVL+BDE). The efficacy of chemical hepatectomy in BDE+PVL and PVL+BDE groups was compared with that of sole BDE by histology and Western blotting analysis of collagen I expression. RESULTS: After six weeks of the chemical hepatectomy, rats in the BDE group showed hepatocyte damages, fibrosis and 'selfcut' only in the periphery of the embolized lobe. In contrast, rats in the PVL+BDE and BDE+PVL groups exhibited complete necrosis of hepatocytes and replacement with proliferative ductules and collagen fibers, leading to complete fibrosis and 'self-cut' phenomenon in the whole targeted lobe. Collagen I expression in the PVL+BDE group was slightly higher than that in the BDE+PVL group; however, no statistically significant difference was noted. CONCLUSION: The sequential embolization of the bile duct and portal vein branches to the targeted hepatic lobe may bea feasible and effective approach to acheive the ideal effect of chemical hepatectomy in a short period of time.

关键词： hepatolithiasis bile duct portal vein sequential embolization chemical hepatectomy

Baseline differences may impact on relationship between dietary tryptophan and risk of obesity and type 2 diabetes

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World Journal of Clinical Cases 2022年第21期10卷 7617-7619页

作者： Xiao-hua Ren Ya-wen Ye Lian-Ping He School of Medicine Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina

Recently,we read with great interest an article reporting a relationship between dietary tryptophan and the risk of obesity and type 2 diabetes(T2D).However,baseline characteristics differed among tertiles of cumulative dietary tryptophan intake in that study,which may be a confounding factor for the relationship between dietary tryptophan and the risk of obesity and T2D.

关键词： Diabetes Obesity Dietary Tryptophan Type 2 diabetes

Ground-state phases and spin textures of spin–orbit-coupled dipolar Bose–Einstein condensates in a rotating toroidal trap

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Chinese Physics B 2020年第11期29卷 446-456页

作者： Qing-Bo Wang Hui Yang Ning Su Ling-hua wen Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China School of Physics and Technology Tangshan Normal UniversityTangshan 063000China Department of Physics Xinzhou Teachers UniversityXinzhou 034000China

We investigate the ground-state phases and spin textures of spin-orbit-coupled dipolar pseudo-spin-1/2 Bose-Einstein condensates in a rotating two-dimensional toroidal *** combined effects of dipole-dipole interaction(DDI),spin-orbit coupling(SOC),rotation,and interatomic interactions on the ground-state structures and topological defects of the system are analyzed *** fixed SOC strength and rotation frequency,we provide a set of phase diagrams as a function of the DDI strength and the ratio between inter-and intra-species *** system can show rich quantum phases including a half-quantum vortex,symmetrical(asymmetrical)phase with quantum droplets(QDs),asymmetrical segregated phase with hidden vortices(ASH phase),annular condensates with giant vortices,triangular(square)vortex lattice with QDs,and criss-cross vortex string lattice,depending on the competition between DDI and contact *** given DDI strength and rotation frequency,the increase of the SOC strength leads to a structural phase transition from an ASH phase to a tetragonal vortex lattice then to a pentagonal vortex lattice and finally to a vortex necklace,which is also demonstrated by the momentum *** rotation,the interplay of DDI and SOC may result in the formation of a unique trumpet-shaped Bloch domain *** addition,the rotation effect is ***,the system supports exotic topological excitations,such as a half-skyrmion(meron)string,triangular skyrmion lattice,skyrmion-halfskyrmion lattice,skyrmion-meron cluster,skyrmion-meron layered necklace,skyrmion-giant-skyrmion necklace lattice,and half-skyrmion-half-antiskyrmion necklace.

关键词： Bose-Einstein condensate dipole-dipole interaction spin-orbit coupling topological defects

Escin may exert a synergistic anti-inflammatory effect with glucocorticoids

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Health 2010年第2期2卷 79-81页

作者： Lei-ming Zhang Tian Wang hua-ying Fan Xin Yu Bing han Mei zhu Feng-hua Fu Department of Pharmacology School of Pharmacy Yantai University

Escin is a natural mixture of triterpenoid as- ponin isolated from the seed of the horse chestnut and demonstrates anti-oedematous and anti-inflammatory effects. As yet, the pre-cise mechanisms by which escin exerts its anti- inflammatory effects remain unclear. The data from current studies indicate that the anti-in-flammatory properties of escin were attributed to its ability to reduce the adhesiveness of neu-trophils and the associated release of inflam-matory mediators;its ability to decrease hista-minic and serotoninergic activities;its ability to inhibit phospholipase A2;its ability to decrease nuclear factor-κ B activation and down-regulate the expression of tumor necrosis factor-α. All these effects are similar to glucocorticoids. Mo- reover, escin depends on adrenal glands to ex-ert its anti-inflammatory effects. Also, our recent research showed that the serum corticosterone level in mice did not increase after a 7-day in-travenous injection of escin. The results sup-port the hypothesis that escin may exert a syn-ergistic anti-inflammatory effect with glucocor-ticoids. Confirming this hypothesis will play a role in elucidating the anti-inflammatory mech- anisms of escin.

关键词： Escin Glucocorticoids Inflammation Synergism

原油裂解气资源评价的理论技术创新与评价应用——以四川盆地震旦系—寒武系为例

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地质论评 2024年第1期70卷 309-329页

作者：郭泽清赵文智谢增业王志宏姜华李剑朱光有中国石油勘探开发研究院北京100083

四川盆地震旦系—寒武系天然气资源丰富。近年来,在四川盆地川中古隆起和北部斜坡区先后获得了两个万亿级大气区的重大发现。为了明确该领域天然气的资源规模以及未来的勘探方向和创建一套切实可行的原油裂解气资源量的评估方法,本次研... 详细信息

四川盆地震旦系—寒武系天然气资源丰富。近年来,在四川盆地川中古隆起和北部斜坡区先后获得了两个万亿级大气区的重大发现。为了明确该领域天然气的资源规模以及未来的勘探方向和创建一套切实可行的原油裂解气资源量的评估方法,本次研究基于该区天然气为古油藏原油裂解的基本认识,按照干酪根生油,再到古油藏裂解生气的技术路线对原油裂解气的资源量进行计算。应用成因法,采用PetroMod 3D盆地模拟软件,输入地层等厚图、岩相古地理图、烃源岩综合评价图、剥蚀量展布图以及生油动力学参数图版,建立整个盆地的三维地质模型,并切分为5个区块分别计算生油量,然后探讨了石油运聚系数、石油裂解率、天然气散失率以及寒武系石油运移的分配系数,并创建了天然气散失系数计算公式。在以上基础上,恢复了盆地及5个构造单元的生油史,并明确了古油藏形成的关键时刻,最终得到全盆地震旦系—寒武系常规天然气资源量为13.43×10^(12)m^(3),其中寒武系为5.43×10^(12)m^(3),震旦系为8.0×10^(12)m^(3)。并指出除了川中地区以外,川南和川东具有巨大的勘探潜力,尤其是位于川南地区德阳—安岳裂陷槽两侧的台缘带和台内颗粒滩是下一步勘探的现实领域。本次研究在理论创新和勘探实践中都具有重要意义。

关键词：四川盆地震旦系—寒武系原油裂解气资源量原油裂解率天然气散失率

基于IPSO-BP神经网络的导线舞动预警方法

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电力科学与技术学报 2024年第2期39卷 152-158页

作者：杨春侠曹倩于增豪朱陶炜李春林王文长沙理工大学土木工程学院湖南长沙410114 长沙理工大学电气与信息工程学院湖南长沙410114

为确保输电线路在易舞气象条件下的正常运维,根据线路舞动与气象条件之间的复杂映射关系,采用改进粒子群算法(improved particle swarm optimization,IPSO)对BP神经网络进行优化,提出一种基于改进粒子群算法优化BP(IPSO-BP)神经网络的... 详细信息

为确保输电线路在易舞气象条件下的正常运维,根据线路舞动与气象条件之间的复杂映射关系,采用改进粒子群算法(improved particle swarm optimization,IPSO)对BP神经网络进行优化,提出一种基于改进粒子群算法优化BP(IPSO-BP)神经网络的导线舞动预测方法。利用文本挖掘技术分析舞动影响因素,确定以档距、覆冰厚度、温度、风速、风向、相对湿度及风向与线路走向夹角为特征输入的IPSO-BP神经网络模型,通过舞动历史数据训练模型以达到预测的功能。对比IPSO-BP神经网络模型与其他算法模型的精度和稳定性,结果表明该方法具有一定的优越性。最后采用该方法预测河南谢庄地区的导线舞动,验证该方法的准确性和实用性。

关键词：输电线路舞动预警粒子群算法 BP神经网络