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Positron Emission Tomography Lung Image Respiratory Motion Correcting with Equivariant Transformer

Computers, Materials & Continua 2024年第5期79卷 3355-3372页

作者： Jianfeng He Haowei Ye jie Ning Hui Zhou Bo she Faculty of Information Engineering and Automation Kunming University of Science and TechnologyYunnan Key Laboratory of Artificial IntelligenceKunming650500China School of Physics and Electronic Engineering Yuxi Normal UniversityYuxi653100China PET/CT Center Affiliated Hospital of Kunming University of Science and TechnologyFirst People’s Hospital of Yunnan ProvinceKunming650031China

In addressing the challenge of motion artifacts in Positron Emission Tomography (PET) lung scans, our studyintroduces the Triple Equivariant Motion Transformer (TEMT), an innovative, unsupervised, deep-learningbasedframework for efficient respiratory motion correction in PET imaging. Unlike traditional techniques,which segment PET data into bins throughout a respiratory cycle and often face issues such as inefficiency andoveremphasis on certain artifacts, TEMT employs Convolutional Neural Networks (CNNs) for effective featureextraction and motion ***’s unique approach involves transforming motion sequences into Liegroup domains to highlight fundamental motion patterns, coupled with employing competitive weighting forprecise target deformation field generation. Our empirical evaluations confirm TEMT’s superior performancein handling diverse PET lung datasets compared to existing image registration networks. Experimental resultsdemonstrate that TEMT achieved Dice indices of 91.40%, 85.41%, 79.78%, and 72.16% on simulated geometricphantom data, lung voxel phantom data, cardiopulmonary voxel phantom data, and clinical data, respectively. Tofacilitate further research and practical application, the TEMT framework, along with its implementation detailsand part of the simulation data, is made publicly accessible at https://***/yehaowei/temt.

关键词： PET lung scans respiratory motion correction triple equivariant motion transformer lie group motion decomposition

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Synergism of solar-driven interfacial evaporation and photo-Fenton Cr(Ⅵ) reduction by sustainable Bi-MOF-based evaporator from waste polyester

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Journal of Energy Chemistry 2024年第7期94卷 527-540页

作者： Zifen Fan jie Liu Huajian Liu Lijie Liu Yan she Xueying Wen Huiyue Wang Guixin Hu Ran Niu Jiang Gong Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSemiconductor Chemistry CenterSchool of Chemistry and Chemical EngineeringHuazhong University of Science andTechnologyWuhan430074HubeiChina

The integration of interfacial solar steam generation and photocatalytic degradation technology has pro-vided a promising platform to simultaneously produce freshwater and degrade ***,con-structing low-cost,multi-functional evaporators for treating Cr(Ⅵ)-polluted water remains challenging,and the synergistic mechanism on Cr(Ⅵ)reduction is ***,we propose the combined strategy of ball milling and solution mixing for the sustainable production of Bi-MOF microrod from waste poly(ethylene terephthalate),and construct Bi-MOF-based solar evaporators for simultaneous photo-Fenton Cr(Ⅵ)reduction and freshwater ***,the evaporator comprised of Bi-MOF microrod and graphene nanosheet possesses high light absorption,efficient photothermal conversion,and good hydro-philic *** to the advantages,the hybrid evaporator exhibits the evaporation rate of 2.16 kg m^(-2) h^(-1) and evaporation efficiency of 87.5%under 1 kW m^(-2) of *** integrating with photo-Fenton reaction,the Cr(Ⅵ)reduction efficiency is 91.3%,along with the reaction kinetics of 0.0548 min^(-1),surpassing many advanced *** the outdoor freshwater production and Cr(Ⅵ)reduction,the daily accumulative water yield is 5.17 kg m^(-2) h^(-1),and the Cr(Ⅵ)reduction efficiency is 99.9%.Furthermore,we prove that the localization effect derived from the interfacial solar-driven evap-oration enhances H_(2)O_(2) activation for the photo-Fenton reduction of Cr(Ⅵ).Based on the result of density functional theory,Bi-MOF microrod provides rich active centers for H_(2)O_(2) activation to produce active sites such as e-or-O_(2).This study not only proposes a new strategy to construct multi-functional solar evaporators for freshwater production and catalytic reduction of pollutants,but also advances the chem-ical upcycling of waste polyesters.

关键词： Interfacial solar steam generation Cr(VI)reduction Photo-Fenton reaction Metal-organic framework Waste plastic upcycling

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Clinical risk factors for preterm birth and evaluating maternal psychology in the postpartum period

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World Journal of Psychiatry 2024年第5期14卷 661-669页

作者： Jia-Jun Chen Xue-Jin Chen Qiu-Min she jie-Xi Li Qiu-Hong Luo Department of Clinical Laboratory Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Otolaryngology Head and Neck Surgery Outpatient Shenzhen Children’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Prevention and Health Care Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Obstetrics Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina

BACKGROUND Although the specific pathogenesis of preterm birth(PTB)has not been thoroughly clarified,it is known to be related to various factors,such as pregnancy complications,maternal socioeconomic factors,lifestyle habits,reproductive history,environmental and psychological factors,prenatal care,and nutritional *** has serious implications for newborns and families and is associated with high mortality and ***,the prediction of PTB risk can facilitate early intervention and reduce its resultant adverse *** To analyze the risk factors for PTB to establish a PTB risk prediction model and to assess postpartum anxiety and depression in *** A retrospective analysis of 648 consecutive parturients who delivered at shenzhen Bao’an District Songgang People’s Hospital between January 2019 and January 2022 was *** to the diagnostic criteria for premature infants,the parturients were divided into a PTB group(n=60)and a full-term(FT)group(n=588).Puerperae were assessed by the Self-rating Anxiety Scale(SAS)and Self rating Depression Scale(SDS),based on which the mothers with anxiety and depression symptoms were screened for further *** factors affecting PTB were analyzed by univariate analysis,and the related risk factors were identified by logistic *** According to univariate analysis,the PTB group was older than the FT group,with a smaller weight change and greater proportions of women who underwent artificial insemination and had gestational diabetes mellitus(P<0.05).In addition,greater proportions of women with reproductive tract infections and greater white blood cell(WBC)counts(P<0.05),shorter cervical lengths in the second trimester and lower neutrophil percentages(P<0.001)were detected in the PTB group than in the FT *** PTB group exhibited higher postpartum SAS and SDS scores than did the FT group(P<0.0001),with a higher number of mothers experiencing anxiety and depress

关键词： Preterm birth Risk factors Postpartum psychological state Risk model Prediction

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Effects of desert plant communities on soil enzyme activities and soil organic carbon in the proluvial fan in the eastern foothills of the Helan Mountain in Ningxia,China

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Journal of Arid Land 2024年第5期16卷 725-737页

作者： sheN Aihong SHI Yun MI Wenbao YUE Shaoli she jie ZHANG Fenghong GUO Rui HE Hongyuan WU Tao LI Hongxia ZHAO Na College of Forestry and Prataculture of Ningxia University Yinchuan 750021China School of Geography and Planning of Ningxia University Yinchuan 750021China Ningxia Hui Autonomous Region Agricultural Comprehensive Development Center Yinchuan 750002China Ningxia Helan Mountain National Nature Reserve Administration Yinchuan 750021China Yinchuan Yinxi Ecological Protection Forest Management Center Yinchuan 750002China

It is of great significance to study the effects of desert plants on soil enzyme activities and soil organic carbon(SOC)for maintaining the stability of the desert *** this study,we studied the responses of soil enzyme activities and SOC fractions(particulate organic carbon(POC)and mineral-associated organic carbon(MAOC))to five typical desert plant communities(Convolvulus tragacanthoides,Ephedra rhytidosperma,Stipa breviflora,Stipa tianschanica ***,and Salsola laricifolia communities)in the proluvial fan in the eastern foothills of the Helan Mountain in Ningxia Hui Autonomous Region,*** recorded the plant community information mainly including the plant coverage and herb and shrub species,and obtained the aboveground biomass and plant species diversity through sample surveys in late July *** samples were also collected at depths of 0–10 cm(topsoil)and 10–20 cm(subsoil)to determine the soil physicochemical properties and enzyme *** results showed that the plant coverage and aboveground biomass of *** community were significantly higher than those of ***,***,and *** *** communities(P<0.05).Soil enzyme activities varied among different plant *** the topsoil,the enzyme activities of alkaline phosphatase(ALP)andβ-1,4-glucosidas(βG)were significantly higher in *** and *** *** communities than in other plant communities(P<0.05).The topsoil had higher POC and MAOC contents than the ***,the content of POC in the topsoil was 18.17%–42.73%higher than that in the *** structural equation model(SEM)indicated that plant species diversity,soil pH,and soil water content(SWC)were the main factors influencing POC and *** soil pH inhibited the formation of POC and promoted the formation of ***,SWC stimulated POC production and hindered MAOC *** study aimed to gain insight into the effects of desert plant c

关键词： proluvial fan desert plant community soil enzyme activity particulate organic carbon mineral-associated organic carbon Helan Mountain

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The effect of secondary phase on corrosion behaviors of the titanium–zirconium–molybdenum alloy

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Tungsten 2024年第2期6卷 342-354页

作者： Song-Wei Ge Ping Hu jie Deng Shi-Lei Li Hai-Rui Xing Jia-Yu Han Xing-Jiang Hua Li Wang Jun-Zhou Yang Bo Jin Wen Zhang Kuai-she Wang School of Metallurgy Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China Western Xinxing Rare and Precious Metals Co. Ltd.Shangluo 726000China Northwest Institute for Non-Ferrous Metal Research Xi’an 710016China

As the range of applications for molybdenum and its alloys has expanded,the corrosive environment for molybdenum alloys has become more *** the past,the content of doping elements has been studied to investigate their infl uence on the corrosion performance of titanium–zirconium–molybdenum(TZM)*** this paper,it is considered that the second phase in the alloy is the main factor aff ecting the corrosion performance of TZM *** comparing the corrosion behavior of molybdenum metal and TZM alloy,the eff ect of the secondary phase on corrosion behaviors of TZM alloy has been *** results show that the second phase reduces the corrosion resistance of the TZM *** potential of the second phase is 73.7 mV higher than that of the Mo matrix,which contributes to the formation of microscopic electric *** the action of microscopic electric couples,pitting corrosion is preferentially formed at the interface between the second phase and the matrix,which accelerates the corrosion of the *** paper provides a theoretical basis for the application of TZM alloys in corrosive environments.

关键词： Secondary phase Electrochemical corrosion Titanium–zirconium–molybdenum(TZM) Galvanic corrosion Corrosion resistance

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基于聚集诱导效应(AIE)-激发态分子内质子转移(ESIPT)效应的四苯乙烯荧光探针对Zn(Ⅱ)检测研究

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有机化学 2024年第4期44卷 1337-1342页

作者：张继东杨垚张杰厍伟安康学院化学化工学院陕西省富硒食品质量监督检验中心陕西安康725000 中国富硒产业研究院农业农村部富硒产品开发与质量控制重点实验室陕西安康725000

设计合成了一种以四苯乙烯为荧光基团、邻香草醛为识别基团的聚集诱导效应(AIE)Zn^(2+)荧光探针.探针的结构通过^(1)H NMR、质谱及X射线单晶衍射进行了表征.荧光光谱研究发现,探针对Zn^(2+)表现出良好的选择性和灵敏性,荧光强度随着Zn^(... 详细信息

设计合成了一种以四苯乙烯为荧光基团、邻香草醛为识别基团的聚集诱导效应(AIE)Zn^(2+)荧光探针.探针的结构通过^(1)H NMR、质谱及X射线单晶衍射进行了表征.荧光光谱研究发现,探针对Zn^(2+)表现出良好的选择性和灵敏性,荧光强度随着Zn^(2+)的浓度增大而逐渐增强.通过Job plot和单晶结构表征发现,探针与Zn^(2+)是2∶1的结合模式,检测限为56.2 nmol·L^(-1).检测机理归因于激发态分子内质子转移(ESIPT)和AIE效应.该新型AIE探针可作为分析测定Zn^(2+)的一种便捷工具.

关键词：四苯乙烯聚集诱导发光荧光探针锌配合物

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信号交叉口右转渠化岛区域非机动车过街冲突

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科学技术与工程 2024年第15期24卷 6485-6492页

作者：揭文祺马社强中国人民公安大学交通管理学院北京100038

为科学评价信号交叉口右转渠化岛设置给非机动车过街带来的交通安全风险,实地采集了南昌市5个信号交叉口的视频,并提取了各交叉口右转渠化岛区域机非冲突数据、交叉口几何设计特征、交叉口渠化方式以及交通流特性等数据;采用改进型距离... 详细信息

为科学评价信号交叉口右转渠化岛设置给非机动车过街带来的交通安全风险,实地采集了南昌市5个信号交叉口的视频,并提取了各交叉口右转渠化岛区域机非冲突数据、交叉口几何设计特征、交叉口渠化方式以及交通流特性等数据;采用改进型距离碰撞时间(time to collision,TTC)对交通冲突进行判定,共得到304起冲突事件;基于贝叶斯方法构建了考虑不同交叉口间异质性的随机效应冲突模型,对比了固定效应与随机效应负二项模型的拟合优度并分析了显著影响因素;基于随机效应模型,确定了期望机非冲突数计算公式,绘制了不同交通流情况下信号交叉口渠化岛设置标准曲线并提供了案例说明。研究表明:相比于固定效应模型,随机效应模型对机非冲突有更好的拟合效果;相比于无渠化岛交叉口,软渠化岛和硬渠化岛的设置会导致交通冲突分别增加38%和61.4%;右转机动车交通量、过街非机动车交通量和非机动车违法行驶数量每增加1%,将导致机非冲突分别增加0.85%、0.44%和0.18%;右转机动车平均速度每增加1%,将导致机非冲突减少2.5%。研究成果为定量化分析交通冲突影响要素提供了有效思路,可为右转渠化岛交通设计提供理论支撑。

关键词：交通冲突信号交叉口右转渠化岛设置方法交通冲突模型

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中华乌塘鳢(Bostrychus sinensis)白细胞介素8基因的克隆及免疫应答表达分析

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海洋与湖沼 2024年第2期55卷 499-508页

作者：陈林杰沈斌张建设浙江海洋大学、国家海洋设施养殖工程技术研究中心浙江舟山316022

由细菌等感染引起的疾病对中华乌塘鳢(Bostrychus sinensis)养殖业的可持续发展造成严重威胁。白细胞介素8(Interleukin-8,IL-8)在调节炎症反应和抗感染免疫方面扮演着重要的作用。利用PCR扩增和克隆测序获得了中华乌塘鳢IL-8(命名为BsI... 详细信息

由细菌等感染引起的疾病对中华乌塘鳢(Bostrychus sinensis)养殖业的可持续发展造成严重威胁。白细胞介素8(Interleukin-8,IL-8)在调节炎症反应和抗感染免疫方面扮演着重要的作用。利用PCR扩增和克隆测序获得了中华乌塘鳢IL-8(命名为BsIL-8)cDNA序列。BsIL-8 cDNA序列全长1244 bp,包含576 bp的5’端非编码区序列(5’-UTR),312 bp的开放阅读框序列(ORF)和356 bp的3’端非编码区序列(3’-UTR)。BsIL-8共编码103个氨基酸,包含1个由18个氨基酸组成的信号肽和1个由62个氨基酸组成的SCY结构域。其中,SCY结构域包含1个CXC基序(Cys^(30)-Arg^(31)-Cys^(32))以及4个保守的半胱氨酸残基(Cys^(30)、Cys^(32)、Cys^(57)和Cys^(73))。序列分析结果表明,BsIL-8与大弹涂鱼(Boleophthalmus pectinirostris)的IL-8序列相似性和一致性最高(分别为92.4%和86.4%)。基因组织表达分布结果显示,BsIL-8基因在主要组织器官中呈泛在性表达,头肾BsIL-8基础表达量最高,肝脏次之,外周血最低。Poly(I:C)免疫刺激后,BsIL-8在4个重要免疫器官(脾脏、肝脏、头肾和外周血)中的表达量均发生了显著的上调(分别在刺激后3、12、24和24 h时表达量达到最高,P<0.01)。副溶血弧菌(Vibrio parahaemolyticus)感染后,BsIL-8基因在脾脏和外周血中的表达量均显著上调(均在感染后12 h时表达量达到最高,P<0.01),而在肝脏和头肾中的表达量均显著下调(均在感染后12 h时表达量达到最低,P<0.01)。综上所述,BsIL-8基因参与了中华乌塘鳢抗感染免疫应答过程。

关键词：中华乌塘鳢(Bostrychus sinensis) 白细胞介素8(IL-8) 基因表达免疫应答副溶血弧菌

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Effect of foot reflexology on an infant with sensorineural hearing loss:A case report

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World Journal of Clinical Cases 2024年第8期12卷 1437-1441页

作者： Yu-Jun Lee Mao-Qing Chen jie Dong Graduate School Xi'an International Studies UniversityNorth Sichuan Medical UniversityXi'an 710061Shaanxi ProvinceChina Department of Neural Disease North Sichuan Medical UniversityNanchong 635200Sichuan ProvinceChina Department of Nursing North Sichuan Medical UniversityNachong 635200Sichuan ProvinceChina Key Laboratory for Artificial Intelligence and Cognitive Neuroscience of Language Xi’an International Studies UniversityXi’an 710128Shaanxi ProvinceChina

BACKGROUND Our study contributes to the further understanding of the mechanism of foot *** reflexology has been reported to affect hearing recovery,but no physiological evidence has been *** lack of evidence hampers the acceptance of the technique in clinical *** SUMMARY A girl was taken to North Sichuan Medical University Affiliated Hospital for a hearing screen by her *** parents reported that her hearing level was the same as when she was *** girl was diagnosed with sensorineural hearing loss(SNHL)by a doctor in the otolaryngology *** we introduced the foot reflexology project,the parents agreed to participate in the *** 6 months of foot reflexology treatment,the hearing threshold of the girl recovered to a normal level,below 30 *** Foot reflexology should be encouraged in clinical practice and for families of infants with SNHL.

关键词： Infant with sensorineural hearing loss Foot reflexology Functional connectivity Language development Case report

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基于状态平面分析法的LLC谐振变换器四阶段软启动

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中国电机工程学报 2024年第16期44卷 6597-6609,I0026页

作者：李佳昊陈捷侯俊峰江凌峰佘焱王勇上海交通大学电气工程系上海市闵行区200240

LLC谐振变换器的启动过程是一个复杂的动态过程,现有的启动方案往往很难同时保证谐振电流在电流限值之下且启动过程迅速。为实现快速且稳定的软启动,该文提出基于状态平面分析法的LLC四阶段软启动方案。通过对LLC启动过程中状态轨迹的分... 详细信息

LLC谐振变换器的启动过程是一个复杂的动态过程,现有的启动方案往往很难同时保证谐振电流在电流限值之下且启动过程迅速。为实现快速且稳定的软启动,该文提出基于状态平面分析法的LLC四阶段软启动方案。通过对LLC启动过程中状态轨迹的分析,将LLC的启动过程分为4个阶段,并对各个阶段的谐振电流进行计算,保证谐振电流的最大值不超过电流限值,根据各个阶段设计不同的实现方式,并介绍LLC四阶段软启动方案的数字控制实现方法。搭建仿真模型和实验样机,验证LLC四阶段软启动方案的安全性与快速性以及计算方法的精确性与合理性。

关键词： LLC谐振变换器软启动状态轨迹

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