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Evolution of strontium isotopic composition of sea-water from Late Permian to Early Triassic based on study of marine carbonates,Zhongliang Mountain,Chongqing,China

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Science China Earth Sciences 2008年第4期51卷 528-539页

作者： HUANG SiJing Qing HaiRuo HUANG PeiPei HU ZuoWei wang qingdong ZOU MingLiang LIU HaoNian State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation Institute of Sedimentary GeologyChengdu University of TechnologyChengdu 610059China Department of Geology University of ReginaRegina S4S 0A2Canada

Collected from a Late Permian to Early Triassic sedimentary section in the Zhongliang Mountain of Chongqing, Southwest China, sixty marine carbonate samples were measured for the 87Sr/86Sr ratios, and corresponding evolution curve was constructed. The concentrations of SiO2, CaO, MgO, Mn and Sr are used to evaluate reservation of strontium isotopic composition for original seawater and the credi-bility of the dissolution method for sample preparation. The results show that most of the samples (except seven samples with the Mn/Sr ratios higher than 2) contain the original geochemistry signa-tures of ancient seawater. Compared to the published 87Sr/86Sr ratios from the Late Permian to Early Triassic, our database reported here is the largest and the curve constructed is the most complete. The strontium isotopic curve from Late Permian to Early Triassic is consistent globally and exhibits a gen-eral trend of steady increase during this period. The minimum of 87Sr/86Sr ratios (0.707011) occurs in the Late Permian (30 m in thickness below the Permian-Triassic boundary), and the maximum (0.708281), near the Early-Middle Triassic boundary. The lack of land plants and the rapid continental weathering result in the increase of 87Sr/86Sr ratios during the interval. The Permian-Triassic boundary in Zhongli-ang Mountain Section has been accepted internationally. The 87Sr/86Sr ratios of six samples near the boundary vary from 0.70714 to 0.70715 with an average of 0.70714, which is consistent with the value of 0.70715 (samples are from articulate brachiopod shells) from Korte et al. published in 2006 (within the error range in experiment). Accordingly, the strontium isotope composition in the Permian-Triassic boundary in this paper is of global significance. It can be confirmed that the 87Sr/86Sr ratios of the sea-water in the Permian-Triassic transition are in the range of 0.70714―0.70715.

关键词： Zhongliang Mountain Chongqing Late Permian-Early Triassic paleoseawater strontium isotope composition

经导管肝动脉持续灌注治疗序贯卡培他滨及PD-1抑制剂治疗不可切除肝门部胆管癌的疗效及安全性

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中国癌症防治杂志 2024年第1期16卷 90-95页

作者：刘松张永会王庆东李龙于广计临沂市肿瘤医院介入科临沂276034

目的探讨经导管肝动脉持续灌注治疗序贯卡培他滨及PD-1抑制剂治疗不可切除肝门部胆管癌的疗效及安全性。方法回顾性分析2019年10月至2021年10月在临沂市肿瘤医院收治的34例不可切除肝门部胆管癌患者的临床资料,所有患者均接受经导管肝... 详细信息

目的探讨经导管肝动脉持续灌注治疗序贯卡培他滨及PD-1抑制剂治疗不可切除肝门部胆管癌的疗效及安全性。方法回顾性分析2019年10月至2021年10月在临沂市肿瘤医院收治的34例不可切除肝门部胆管癌患者的临床资料,所有患者均接受经导管肝动脉持续灌注治疗序贯卡培他滨及PD-1抑制剂治疗,患者先完成2~6个周期mFOLFOX7-肝动脉持续灌注化疗(hepatic arterial infusion chemotherapy,HAIC)以及PD-1抑制剂动脉灌注治疗,灌注治疗后序贯行卡培他滨单药化疗及PD-1抑制剂静脉点滴治疗。观察患者的客观缓解率(objective response rate,ORR)、疾病控制率(disease control rate,DCR)以及不良反应发生情况,分析总生存期(overall survival,OS)及其影响因素。结果34例患者共行介入治疗155次,平均(4.56±1.61)次;接受2个周期介入治疗后ORR为61.76%(21/34),DCR为97.06%(33/34);完成介入治疗后总体ORR为82.35%(28/34),DCR为100.00%(34/34)。中位随访时间为17.5个月,中位OS为20.0个月(95%CI:15.0~25.0个月)。HAIC治疗相关不良反应主要为发热、腹痛、恶心呕吐及化疗药物引起的血液学毒性等,均为1~2级;PD-1抑制剂治疗相关不良反应主要为疲劳、皮疹、体表毛细血管增生等,均≤3级。多因素Cox回归分析显示,导管周浸润型是OS的危险因素(HR=2.051,95%CI:1.039~4.407,P=0.038),介入治疗5~6次为OS的保护因素(HR=0.465,95%CI:0.219~0.853,P=0.006)。结论经导管肝动脉持续灌注治疗序贯卡培他滨及PD-1抑制剂治疗不可切除肝门部胆管癌具有较好的疗效,且不良反应可控,其中生长模式分型和介入治疗次数可影响患者生存率。

关键词：肝门部胆管癌肝动脉持续化疗 PD-1抑制剂卡培他滨

Dynamic coverage of mobile multi-target in sensor networks based on virtual force

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The Journal of China Universities of Posts and Telecommunications 2024年第4期31卷 83-94页

作者： Huang qingdong wang Mei Chen Chen Han Zhuang School of Communication and Information Engineering Xi'an University of Posts and TelecommunicationsXi'an 710121China

A distributed self-control coverage method for mobile multi-target based on virtual force(MMTVF)is proposed to monitor dynamic targets using a mobile sensor network(MSN).The dynamic coverage method is introduced to maintain network connectivity and optimize the coverage of moving *** method consists of two parts,one is the virtual force model which is proposed for motion control,and the other is the whale optimization algorithm which is improved to optimize node positions and achieve a steady state *** virtual resultant force stretches the network towards uncovered targets using its multi-target attractive force,maintains network connectivity during network stretching using its attractive force,and prevents node collisions while nodes are moving using its repulsive *** operating mechanism of the multi-target attractive force and other forces is thoroughly *** criteria for the model in different application scenarios are also *** comparisons demonstrate MMTVF has significant advantages over other similar approaches.

关键词： mobile sensor network(MSN) dynamic coverage virtual force moving targets

Beam alignments based on the spectrum decomposition of orbital angular momentums for acoustic-vortex communications

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Chinese Physics B 2022年第12期31卷 296-304页

作者： Gepu Guo Xinjia Li qingdong wang Yuzhi Li Qingyu Ma Juan Tu Dong Zhang School of Computer and Electronic Information Nanjing Normal UniversityNanjing 210023China Haiying Enterprise Group Co. Ltd.Wuxi 214061China College of Ocean Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Institute of Acoustics Nanjing UniversityNanjing 210093China

Given the enhanced channel capacity of wave chirality,acoustic communications based on the orbital angular momentum(OAM)of acoustic-vortex(AV)beams are of significant interest for underwater data ***,the stringent beam alignment is required for the coaxial arrangement of transceiver arrays to ensure the accuracy and reliability of OAM *** avoid the required multiple measurements of the traditional orthogonality based algorithm,the beam alignment algorithm based on the OAM spectrum decomposition is proposed for AV communications by using simplified *** studies of the single-OAM and OAM-multiplexed AV beams show that the error of the OAM spectrum increases with the translation distance and the deflection angle of the transceiver *** achieve an ideal arrangement,two methods of the single-array translation alignment and the dual-array deflection alignment are developed based on the least standard deviation of the OAM spectrum(SD-OAM).By decreasing the SD-OAM towards zero using transceiver arrays of 16 transmitters and 16 receivers,accurate beam alignments are accomplished by multiple adjustments in three *** proposed method is also demonstrated by experimental measurements of the OAM dispersion and the SD-OAM for misaligned *** results demonstrate the feasibility of the rapid beam alignment based on the OAM spectrum decomposition by using simplified transceiver ring-arrays,and suggest more application potentials for acoustic communications.

关键词： acoustic-vortex beam beam alignment orbital angular momentum(OAM)spectrum least standard deviation acoustic communication

Pulling force of acoustic-vortex beams on centered elastic spheres based on the annular transducer model

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Chinese Physics B 2020年第5期29卷 318-325页

作者： Yuzhi Li qingdong wang Gepu Guo Hongyan Chu Qingyu Ma Juan Tu Dong Zhang School of Physics and Technology Nanjing Normal UniversityNanjing 210023China College of Ocean Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Institute of Acoustics Nanjing UniversityNanjing 210093China

To solve the difficulty of generating an ideal Bessel beam,an simplified annular transducer model is proposed to study the axial acoustic radiation force(ARF)and the corresponding negative ARF(pulling force)exerted on centered elastic spheres for acoustic-vortex(AV)beams of arbitrary *** on the theory of acoustic scattering,the axial distributions of the velocity potential and the ARF for AV beams of different orders generated by the annular transducers with different physical sizes are *** is proved that the pulling force can be generated by AV beams of arbitrary orders with multiple axial *** pulling force is more likely to exert on the sphere with a smaller k0a(product of the wave number and the radius)for the AV beam with a bigger topological charge due to the strengthened off-axis acoustic *** pulling force decreases with the increase of the axial distance for the sphere with a bigger *** pulling force areas with wider axial regions can be formed by AV beams using a bigger-sized annular *** theoretical results demonstrate the feasibility of generating the pulling force along the axes of AV beams using the experimentally applicable circular array of planar transducers,and suggest application potentials for multi-position stable object manipulations in biomedical engineering.

关键词： acoustic radiation force pulling force acoustic-vortex beams annular transducer model acoustic scattering

关节镜下自体骨软骨移植对膝关节局限性软骨损伤的临床疗效评价

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组织工程与重建外科 2024年第1期20卷 83-86,92页

作者：李杰峰金艳南王庆东康乐徐向峰李付彬漯河医学高等专科学校第二附属医院河南省漯河市462300

目的探讨关节镜下自体骨软骨移植术对膝关节局限性软骨损伤的临床疗效,并以磁共振成像(MRI)检查对疗效进行评价。方法选取2018年6月至2021年6月诊治的100例膝关节局限性软骨损伤患者,按随机数字表法分为研究组和对照组,每组各50例。研... 详细信息

目的探讨关节镜下自体骨软骨移植术对膝关节局限性软骨损伤的临床疗效,并以磁共振成像(MRI)检查对疗效进行评价。方法选取2018年6月至2021年6月诊治的100例膝关节局限性软骨损伤患者,按随机数字表法分为研究组和对照组,每组各50例。研究组采取关节镜下自体骨软骨移植术,对照组采取微骨折术治疗。采用MRI评估其手术疗效,并记录其术后膝关节软骨愈合时间;采用Lysholm膝关节功能评分表、国际膝关节文献委员会(IKDC)膝关节评估表,评估患者治疗前后膝关节功能变化;统计患者术后并发症发生率。结果研究组关节软骨愈合优良率98.00%,高于对照组84.00%(P0.05);术后6、12、24个月,研究组Lysholm评分、IKDC评分均高于对照组(P0.05)。研究组术后膝关节软骨愈合时间短于对照组(P<0.05)。结论关节镜下自体骨软骨移植术对膝关节局限性软骨损伤的远期治疗效果显著,可有效改善患者术后膝关节功能,缩短膝关节软骨愈合时间,安全性高。

关键词：关节镜自体骨软骨移植术膝关节局限性软骨损伤磁共振成像膝关节功能

Processing Seismic Ambient Noise Data to Obtain Reliable Surface Wave Dispersion Measurements

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Earthquake Research in China 2015年第2期29卷 214-224页

作者： Li Lingli wang Weitao Zhu Liangbao Chen Haopeng wang qingdong Miao Peng wang Jun Earthquake Administration of Anhui Province Mengcheng National Geophysical Observatory Institute of Geophysics CEA Department of Geophysics School of Geodesy and GeometricsWuhan University

Ambient noise tomography is a rapidly emerging field of seismological research. This paper presents the current status of ambient noise data processing and its development history over the past several years, with the intention to explain and justify this development through salient examples. The ambient noise data processing procedure can be divided into four principal phases： ① single station data preparation; ② cross- correlation and temporal stacking; ③ measurements of dispersion curves （ performed with frequency-time analysis for both group and phase speeds） ; ④ quality control, including SNR analysis and selection of the acceptable measurements. In addition, we provide a specific solution for a better use of the seismic station data to ambient noise study.

关键词： Seismic ambient noise Cross-correlation Rayleigh surface wave Dispersion curves

Multiple interface coupling on natural tourmaline enables high-efficiency removal of antibiotic:Superior property and mechanism

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Journal of Environmental Sciences 2024年第6期140卷 242-254页

作者： Jingjing Cui Xiangyu Liu Feifan Qie Chengzhe Xie qingdong He Jian Liu Steven L.Suib Wenbo wang College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China Department of Chemistry University of ConnecticutStorrsCT 06269-3060United States

Reasonably designing highly active,environmentally friendly,and cost-effective catalysts for efficient elimination of pollutants from water is desirable but ***,an efficient heterogeneous photo-Fenton catalyst tourmaline(TM)/tungsten oxide(WO_(3-x))(named TW10)containing tungsten/boron/iron(W/B/Fe)synergistic active centers and 90%of cheap natural tourmaline(TM)mineral rich in Fe and B *** TW10 catalyst can quickly activate peroxymonosulfate(PMS)to generate massive active free radicals,which may induce the rapid and efficient degradation of tetracycline(TC).The TW10/PMS/Visible light system can effectively degrade up to 98.7%of tetracycline(TC)in actual waters(***,Yellow River,and Yangtze River water),and the catalytic degradation rates reach 1.65,5.569,and 2.38 times higher than those of TM,WO_(3-x),and commercial P25(Degussa,Germany),*** addition,the catalyst can be recycled and reused multiple *** spin resonance spectroscopy(EPR),X-ray photoelectron spectroscopy(XPS),and liquid chromatograph-mass spectrometer(LC-MS)analyses confirm that the synergistic catalytic effect of W/B/Fe sites on the TW10 catalyst accelerates the electron transfer between Fe(Ⅱ)and Fe(Ⅲ),as well as between W(Ⅴ)and W(Ⅵ),and thus promotes the rapid degradation of *** catalytic reaction mechanism and degradation pathway of TC were *** work provides a feasible route for the design and development of new eco-friendly and efficient catalyst.

关键词： Tourmaline(TM) Fenton-like catalyst Tungsten oxide Peroxymonosulfate Antibiotic

Supramolecular assembly nanoparticle for trans-epithelial treatment of keratoconus

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Chinese Chemical Letters 2024年第10期35卷 1-3页

作者： Wenlong Li Feishi Shan qingdong Bao Qinghua Li Hua Gao Leyong wang State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of OphthalmologyEye Institute of Shandong First Medical UniversityQingdao266071China Eye Hospital of Shandong First Medical UniversityJi'nan 250021China College of Ophthalmology Shandong First Medical UniversityJi'nan 250000China Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of OphthalmologyEye Institute of Shandong First Medical UniversityQingdao 266071Chin Eye Hospital of Shandong First Medical University Ji'nan 250021China

Keratoconus is a clinically prevalent corneal ectasia,characterized by progressive thinning and conical protrusion of the central cornea[1].With an incidence rate of one in every 400 to 2000 individuals,it stands as a leading cause of blindness among the *** date,there are no pharmacological interventions available for the treatment of *** advanced cases culminating in blindness,corneal transplantation remains the only restorative ***,this surgical procedure carries risks of immune rejection and chronic graft failure.

关键词： corneal treatment graft