In Situ High-performance Gel Polymer Electrolyte with Dual-reactive Cross-linking for Lithium Metal Batteries

Lithium metal batteries have been considered as one of the most promising next-generation power-support devices due to their high specific energy and output voltage.However,the uncontrollable side-reaction and lithium dendrite growth lead to the limited serving life and hinder the practical application of lithium metal batteries.Here,a tri-monomer copolymerized gel polymer electrolyte(TGPE)with a cross-linked reticulation structure was prepared by introducing a cross-linker(polyurethane group)into the acrylate-based in situ polymerization system.The soft segment of polyurethane in TGPE enables the far migration of lithium ions,and the-NH forms hydrogen bonds in the hard segment to build a stable cross-linked framework.This system hinders anion migration and leads to a high Li^(+)migration number(t_(Li^(+))=0.65),which achieves uniform lithium deposition and effectively inhibits lithium dendrite growth.As a result,the assembled symmetric cell shows robust reversibility over 5500 h at a current density of 1 mA cm^(-2).The LFP∷TGPE∷Li cell has a capacity retention of 89.8%after cycling 800 times at a rate of 1C.In summary,in situ polymerization of TGPE electrolytes is expected to be a candidate material for high-energy-density lithium metal batteries.

Bibliometric analysis of the status and trend of biological soil crusts research from 1912 to 2023

Biological soil crusts(BSCs)play an important role in soil development and ecological function,and it is more important for quantitatively analyzing the processes and trends of BSCs to identify the advantages and disadvantages of BSCs research for the development and application of BSCs theory.Bibliometric analysis of 2,186 BSCs literatures from Web of Science showed an exponential growth trend,as China and the United States as the top 2 in terms of publication volume.High quality publications are mainly from European and American countries,such as the United States,Germany and Spain.The top 3 publishers are Journal of Arid Environments,Soil Biology&Biochemistry and Plant and Soil,and disciplines include ecology,environmental science,and soil science,etc..Research institutions mainly affiliate to the Chinese Academy of Sciences,United States Department of the Interior,United States Geological Survey,Hebrew University of Jerusalem,Consejo Superior de Investigaciones Cientificas,and Universidad Rey Juan Carlos.Authors mainly come from United States,Israel,Spain and China.Funds are mainly from the National Natural Science Foundation of China,Spanish Government,Chinese Academy of Sciences,and National Science Foundation of the United States.Biological soil crusts(biocrusts,cyanobacteria,lichens,moss crusts,bryophytes),drylands,climate change,photosynthesis and desert are high-frequency keywords.Future research will focus on the driving mechanisms of BSCs on global biogeochemical cycles,maintaining global biodiversity on important ecological processes,global C,N,and P cycles.The impact on biological invasion,sandstorms,and water balance,multifunctional and reciprocal mechanisms for maintaining the stability of desert and sandy ecosystems,and impact on the formulation of management policies for arid ecosystems,corresponding to global climate change,and the estimation of regional,local,and microscale distribution of BSCs based on machine deep learning modeling gradually focus on.The ecosystem service functions of BSCs,the soil and water conservation and soil stability mediated by BSCs in arid and semi-arid regions,and the excavation of stress resistant genes for BSCs will be emphasized.

Study on the mechanism of SND in the treatment of anxiety disorders based on network pharmacology, molecular docking and experiment validation

Background:Sini decoction(SND)is a classic traditional Chinese medicine(TCM)formulation that can be used to treat anxiety-related disorders,but the active substance and underlying molecular mechanism of its anxiolytic effects are unknown.In this study,network pharmacology,molecular docking research and experimental verification methods were used to preliminarily explore the bioactive compounds and potential target mechanisms of SND anxiolytic.Methods:The active components and corresponding targets of SND were collected by TCMSP.GeneCards,OMIM,PharmGkb,TTD and Drugbank were used to search for the targets of anxiety disorders.The core target of SND in the treatment of anxiety was screened by PPI.R language was used to analyze the intersection targets of SND in the treatment of anxiety disorders by GO and KEGG enrichment analysis.AutoDock Vina was used for molecular docking,and Discovery Studio was used for visual conformation analysis after docking.The anti-anxiety effect and molecular mechanism of SND were studied by in vivo experiment.Results:Based on network pharmacological analysis,we obtained 112 active ingredients and 350 effective targets related to anxiety from SND.In PPI analysis,26 targets such as STAT3,MAPK3,MAPK1,MAPK14,SRC,HSP90AA1,TP53 and PIK3CA were identified as core targets.GO and KEGG analysis showed that the anxiolytic mechanism of SND may be related to the neuroactive ligand-receptor interaction pathway and inflammatory pathway.Molecular docking showed that quercetin,naringenin,licochalcone A had high affinity with JAK2,MAPK14 and MAPK3.Animal experiments have shown that SND reverses the upregulation of GluN2B(NMDAR)and GluA1(AMPAR)proteins,and SND improves anxiety disorders by regulating glutamate transmitter levels,which may be related to neuroactive ligand-receptor interaction pathways,particularly glutamate receptors.Conclusion:This study shows that SND can improve FS-induced behavioral changes in mice and can modulate hippocampal synapse-associated protein defects,partially reversing glutamate receptor expression through the neuroactive ligand-receptor interaction pathway,and further improved anxiety disorders.At the same time,combined with network pharmacology and molecular docking,the key components,core targets and related pathways of SND are discussed,which shows that the active components of SND play an effective role in anxiety through multi-targets and multi-pathways,which provides a reference for the material basis and mechanism of SND.

马尔康6.0级震群地震藏族民居震害调查与分析

为掌握马尔康6.0级震群地震中藏族民居的震害情况,对地震灾区进行广泛的调查,总结藏族民居的建筑特点与结构特点,分析石木结构、木结构和生土结构的主要震害特征和破坏原因,并对不同结构类型的建筑震害数量和地质灾害隐患点数量进行统计和分析。研究结果表明:此次地震中,石木结构震害较严重,主要破坏特征为整体倒塌、局部倒塌、墙体破坏、梁柱破坏和屋盖破坏。木结构震害较轻,主要破坏特征为围护墙倒塌、开裂以及屋面溜瓦。由于距离震中较远,生土结构的震害最轻,主要破坏特征为墙体开裂。石木结构和木结构倒塌破坏占比分别为0.9%和0.0%,严重损坏占比分别为19.0%和17.2%。木结构多为非结构构件损坏,抗震能力强于石木结构。同时,地震诱发山体落石、山体滑坡,导致建筑被掩埋、道路中断、水利和通讯设施受损,地质灾害隐患点数量为663处。针对不同藏族民居的震害特征和破坏统计,建议在保留藏族民居建筑特色的前提下,发展受力机理清晰的结构体系,加强藏族民居的抗震措施,并重视该地区的震群型地震效应。根据次生灾害的破坏情况和统计,建议灾后重建中,藏族民居应合理选址,加强地质灾害的监测和预警,并完善防治次生灾害设施。

Repurposing drugs for solid tumor treatment:focus on immune checkpoint inhibitors

Cancer remains a significant global health challenge with limited treatment options beyond systemic therapies,such as chemotherapy,radiotherapy,and molecular targeted therapy.Immunotherapy has emerged as a promising therapeutic modality but the efficacy has plateaued,which therefore provides limited benefits to patients with cancer.Identification of more effective approaches to improve patient outcomes and extend survival are urgently needed.Drug repurposing has emerged as an attractive strategy for drug development and has recently garnered considerable interest.This review comprehensively analyses the efficacy of various repurposed drugs,such as transforming growth factor-beta(TGF-β)inhibitors,metformin,receptor activator of nuclear factor-κB ligand(RANKL)inhibitors,granulocyte macrophage colony-stimulating factor(GM-CSF),thymosinα1(Tα1),aspirin,and bisphosphonate,in tumorigenesis with a specific focus on their impact on tumor immunology and immunotherapy.Additionally,we present a concise overview of the current preclinical and clinical studies investigating the potential therapeutic synergies achieved by combining these agents with immune checkpoint inhibitors.

7.5 Fr电子输尿管软镜治疗小负荷上尿路结石的临床观察

目的探讨7.5 Fr一次性电子输尿管软镜治疗输尿管上段或肾内单发小负荷结石的有效性和安全性。方法回顾性分析2021年6月至2022年12月手术干预的输尿管上段或肾内单发结石患者400例,结石直径1 cm左右,按手术方式分为观察组和对照组,各200例,分别行7.5 Fr和8.5 Fr一次性电子输尿管软镜联合钬激光碎石取石术,术中分别置入9.5/11.5 Fr和12/14 Fr输尿管软镜鞘,钬激光碎石,套石篮取石。观察两组围术期指标、并发症情况、随访结果及手术前后白细胞计数、中性粒细胞比值、C反应蛋白等感染指标。结果观察组200例(100%)患者均一期置鞘完成手术,无分次手术干预或改行经皮肾镜激光碎石术。对照组151例(75.5%)一期置鞘完成手术,余49例中分次进行手术干预7例,改行经皮肾镜激光碎石术42例。两组患者术后复查X线示结石均清除,无残留。观察组术中出血量明显少于对照组,术后血尿持续时间、腰腹部疼痛持续时间及住院时间明显短于对照组,差异均有统计学意义(P<0.05);两组手术时间、置镜成功率及结石清除率比较均无统计学差异(P>0.05)。术后两组患者均不留置导尿管,无感染发生,未出现尿源性脓毒血症。术后观察组15例(7.5%)、对照组73例(36.5%)发生输尿管双J管留置相关并发症(腹痛、血尿或膀胱刺激征),两组比较无统计学差异(P>0.05)。两组手术前、后白细胞计数、中性粒细胞比值、C反应蛋白等感染指标比较均无统计学差异(P>0.05)。结论7.5 Fr一次性电子输尿管软镜治疗输尿管上段或肾内单发小负荷结石(直径1 cm左右)置镜成功率及结石清除率高,创伤小,患者恢复快,安全有效。

0.03%他克莫司软膏联合多磺酸粘多糖乳膏治疗面部单纯糠疹的效果观察

目的:观察探讨0.03%他克莫司软膏联合多磺酸粘多糖乳膏治疗面部单纯糠疹的美学效果。方法:选取2019年11月-2022年1月门诊收治的105例面部单纯糠疹患儿为观察对象,通过随机数字法随机分为联合组(n=53)和对照组(n=52),对照组给予多磺酸粘多糖乳膏治疗,联合组在对照组基础上加用0.03%他克莫司软膏治疗,比较两组治疗后的临床疗效、症状体征评分、皮肤生理功能指标[角质层含水量(Water content of stratum corneum,WCSC)、皮肤油脂(Skin sebum,SC)、经表皮水分流失(Transepidermal water loss,TEWL)]、复发情况、不良反应及美学效果满意度。结果:治疗4周后,联合组总有效率为88.68%,对照组为71.15%,差异有统计学意义(P<0.05)。治疗前两组患儿各项症状体征评分差异均无统计学意义(P>0.05);治疗4周后,两组患儿鳞屑、瘙痒、色素减退、皮损面积及皮损数量评分均较治疗前显著降低(P<0.05),且联合组各症状体征评分明显低于对照组(P<0.05);治疗前两组患儿皮肤生理功能指标差异均无统计学意义(P>0.05);治疗4周后,两组患儿WCSC和SC均显著升高(P<0.05),TEWL均显著降低(P<0.05),且联合组改善优于对照组(P<0.05);结束治疗随访4周,联合组患儿复发率(14.89%)低于对照组(27.03%),差异无统计学意义(P>0.05);治疗期间,两组患儿均未出现明显不良反应;联合组患儿美学效果总满意度(96.23%)显著高于对照组(82.69%)(P<0.05)。结论:0.03%他克莫司软膏联合多磺酸粘多糖乳膏治疗面部单纯糠疹疗效显著,可有效改善患儿皮损症状和皮肤生理功能,能有效预防复发,提高美学效果,且安全性好,值得临床推广应用。

联合检测血清铁蛋白和甲胎蛋白在原发性肝癌患者中应用效果的研究

目的研究检测原发性肝癌患者血清铁蛋白和甲胎蛋白获得的临床效果。方法选取2022年1-12月就诊144例原发性肝癌患者,将其作为研究对象进行组别划分。其中144例原发性肝癌患者为研究组,100名正常人员为对照组,比较两组的甲胎蛋白(AFP)和血清铁蛋白(SF)测定结果、AFP和SF阳性率。结果研究组的血清AFP和SF测定结果较对照组明显,且与对照组的AFP和SF阳性率比较,研究组数值更高(P<0.05)。结论经血清铁蛋白和甲胎蛋白联合检测原发性肝癌,发现实际诊断价值较高,能发挥良好的应用效果。

Absorptive root-multidimension strategy links air temperature and species distribution in a montane forest

Background: Air temperature affects absorptive root traits, which are closely related to species distribution.However, it is still unclear how air temperature regulates species distribution through changes in absorptive root traits. Seven functional traits of the absorptive roots of 240 individuals of 52 species, soil properties and air temperature were measured along an elevational gradient on Mt. Fanjingshan, Tongren City, Guizhou, and then the direct and indirect effects of these controls on species distribution were detected.Results: Absorptive roots adapted to air temperature with two strategies. The first strategy was positively associated with the specific root area(SRA) and specific root length(SRL) and was negatively associated with the root tissue density(RTD), representing the classic root economics spectrum(RES). The second strategy was represented by the trade-off between root diameter, mycorrhizal fungi colonization(MF) and SRL, representing the collaboration gradient with “do it yourself” resource uptake ranging from “outsourcing” to mycorrhizal resource uptake. Air temperature regulated species distribution in six ways: directly reducing species importance value;indirectly increasing the species importance value by reducing soil nitrogen content or increasing soil pH by reducing soil moisture inducing absorptive roots to change from “do it yourself” resource absorption to “outsourcing” resource absorption;indirectly decreasing the species importance value by decreasing soil moisture to change from“outsourcing”resource absorption to “do it yourself” resource absorption;indirectly increasing the species importance value with increasing soil pH by reducing soil moisture resulting in absorptive root traits turning into nutrient foraging traits;and indirectly decreasing the species importance value by promoting absorptive root traits to nutrient conservation traits.Conclusions: Absorptive root traits play a crucial role in the regulation of species distribution through multiapproaches of air temperature.

Macrophage involvement in the pathological evolution of ulcerative colitis-associated colon cancer and progress of related traditional Chinese medicine drug interventions

Intestinal macrophages are essential players in intestinal inflammation and intestinal immune homeostasis.Intestinal macrophages have the ability to polarize into two distinct phenotypes based on various environmental signals.These phenotypes include the typically activated pro-inflammatory M1 phenotype and the alternatively activated anti-inflammatory M2 phenotype.Under normal circumstances,intestinal macrophages prevent inflammatory damage to the gut.However,when genetic and environmental factors influence the polarization of intestinal macrophages,it can lead to an imbalance in M1/M2 macrophage activation and subsequently an imbalance in the control of intestinal inflammation.It transforms physiological inflammation into pathological intestinal damage.In patients with ulcerative colitis-associated cancer(UC-CRC),intestinal inflammatory disorders are closely associated with intestinal M1/M2 macrophage polarization imbalance.Consequently,restoring the polarization equilibrium of M1/M2 macrophages might be an evidence of traditional Chinese medicine in the treatment of UC-CRC,the pivotal role o effective measure to prevent and treat UC-CRC.This paper aims to examine the clinicalf macrophage polarization in UC-CRC pathogenesis,and the potential mechanisms of traditional Chinese medicine in regulating macrophage polarization to treat UC-CRC.Our goal is to provide novel insights into the clinical practice,basic research,and drug development of UC-CRC.

Relationship between Interaction Anxiousness,Academic Resilience,Cultural Intelligence and Ego-Identity among Chinese Vocational Pathway University Students:A Conditional Process Analysis Model

Background:University students’ego-identity,an essential component of their psychological development and mental health,has widely attracted the attention of policymakers,schools,and parents.Method:A total of 298 Chinese vocational pathway undergraduates were recruited,and a conditional process analysis model was adopted to explore the interaction mechanism of ego-identity.Results:The results suggest that the ego-identity of Chinese vocational pathway undergraduates is significantly affected by interaction anxiousness,academic resilience,and cultural intelligence.(1)Interaction anxiousness significantly and positively predicts ego-identity.(2)Academic resilience positively and partially mediates the effect of interaction anxiousness on ego-identity.(3)Cultural intelligence significantly and positively moderates the relationship between interaction anxiousness and ego-identity.However,a similar moderating effect was not found between interaction anxiousness and academic resilience.(4)As cultural intelligence increases,the negative influence of interaction anxiousness on ego-identity gradually diminishes,whatever the cultural intelligence level.Conclusions:Interaction anxiousness,academic resilience,and cultural intelligence are essential determinants of ego-identity among Chinese vocational pathway undergraduates.Strategic interventions should be utilized to enhance their abilities to alleviate interpersonal tensions,promote their resilience in facing academic difficulties,cope with diverse cultures,and boost their sense of self-confirmation.

Study on the correlation between CD80/CD163 and clinical prognosis and the syndrome differentiation in patients with colorectal cancer

Background:To analyze the expression of cluster of differentiation 80(CD80)/cluster of differentiation 163(CD163)in colorectal cancer(CRC)patients and their correlation with the syndrome of traditional Chinese medicine,pathology and prognosis.Methods:(1)The correlation between the pathological characteristics of 232 postoperative CRC patients and the deficiency and excess syndromes of traditional Chinese medicine was analyzed using the chi-square test,Spearman’s correlation,and Cox regression methods.(2)Immunohistochemistry and quantitative real-time PCR were used to detect the expression of CD80 and CD163 in cancer and paracancer tissues of CRC patients.(3)The relationships between the changes of CD80 and CD163 and the prognosis of CRC patients with deficiency syndrome.Patient survival were analyzed using cardinality and Cox regression proportional-hazards model regression.Results:(1)The degree of differentiation and tumor node metastasis stage of CRC were statistically different between patients with deficiency and excess syndromes(P<0.05);carcinoembryonic antigen and carbohydrate antigen 19-9 were highly expressed in the excess syndrome group,and both were significantly correlated with the distribution of traditional Chinese medicine syndromes(P<0.001);deficiency and excess syndromes,and carbohydrate antigen 19-9 were all independent factors affecting the postoperative survival of CRC patients.(2)The distribution of post-operative survival in CRC patients was significantly correlated with the distribution of the disease type(P<0.001).(3)The expression levels of CD163 protein and message RNA were significantly higher in CRC cancer tissues than in paraneoplastic tissues(P<0.001);whereas the expression of CD80 was significantly higher in paraneoplastic tissues than in cancer tissues(P<0.001).(4)The expression levels of CD80/CD163 were significantly different in different parts of the tissues of patients with deficiency and excess syndromes(P<0.001).(5)CRC patients with high CD80 expression and low CD163 expression had longer survival cycles(P<0.001).Conclusion:The malignant progression of CRC patients with deficiency syndrome is faster than that with excess syndrome.The correlation between deficiency and excess syndromes and the expression levels of CD80 and CD163 could be an independent risk factor for the survival prognosis of patients with CRC.

Clinicopathological study of malignant peripheral nerve sheath tumors in the head and neck:Case reports and review of literature

BACKGROUND Malignant peripheral nerve sheath tumor(MPNST)is a rare and aggressive soft tissue sarcoma that poses a major diagnostic and therapeutic challenge.CASE SUMMARY We retrospectively reviewed patients with head and neck MPNSTs treated in our hospital from 2000 to 2021.The clinical features,pathological manifestations,treatments,and prognoses were summarized.We also reviewed the literature,focusing on MPNST in the mandible and maxilla.The study population consisted of five women and five men aged 22–75 years(mean age,49 years).Of the 10 patients,7 were initial cases and 3 were recurrent cases.All lesions were sporadic.The most common site was the mandible.The most frequently encountered symptoms were a progressive mass and local swelling.Complete or partial loss of trimethylation at lysine 27 of histone H3(H3K27me3)was evident on staining in four of nine cases(one case was excluded due to lack of tissue for evaluation of loss of H3K27me3).The 2-and 5-year disease-specific survival rates were 86%a nd 43%,respectively.The average survival time was 64 mo.CONCLUSION MPNST is a highly malignant tumor with a poor prognosis,prone to a high risk of recurrence and distant metastasis.Complete surgical resection is the main treatment.

Retraction:Macrophage involvement in the pathological evolution of ulcerative colitis-associated colon cancer and progress of related traditional Chinese medicine drug interventions

Traditional Medicine Research has retracted this article upon the request of the editor-in-chief and academic committee.On June 5,2023,we received a complaint regarding possible picture plagiarism within the article,which promoted the decision to retract this article.Following a comprehensive examination,it was determined that the content depicted in this article's pictures was identical to that found in another published paper.Consequently,the editorial office determined that retracting the article was necessary.

电磁法分离高丰度铷-87及其应用

铷钟作为北斗卫星导航定位系统的核心部分,提供高精度的时间基准信号。其精度会直接影响北斗系统的性能,高丰度的同位素铷-87是铷钟的核心工作物质,是决定铷钟精度的重要因素。美、俄均利用电磁分离技术分离铷钟所需的高丰度铷-87同位素。目前国内同位素电磁分离铷-87同位素的产量仅能满足小部分需求。随着航天、芯片钟等领域对高丰度铷同位素需求大幅增长,导致国内铷同位素缺口进一步增加,未来每年对铷-87需求可能达数百克至数公斤量级。本研究通过分析量子时频领域的发展现状,掌握量子时频领域铷钟对铷-87同位素的需求情况,据此拟为电磁法分离制备铷同位素的产业化发展提供参考。铷-87同位素分离制备可通过技术攻关和规模化建设提升分离效率,降低生产成本,可为解决铷-87同位素自主可控提供重要保障。

运用重复力模型估计天目多胎羊繁殖性状的遗传参数

本研究旨在通过探究绵羊新品种——天目多胎羊胎产羔数与胎平均初生重、胎产羔重、胎产活羔数的遗传关系,进一步了解其繁殖性能,为新品种培育提供理论依据。以浙江赛诺生态农业有限公司养殖的天目多胎羊为研究对象,收集胎产羔数、胎平均初生重、胎产羔重、胎产活羔数繁殖性状数据各5543条,运用SAS 9.2软件GLM程序对影响天目多胎羊繁殖性状的固定效应进行分析;运用DMU软件中AI-REML算法结合单/多性状重复力模型对4个繁殖性状进行遗传参数估计。结果表明,胎产羔数、胎平均初生重、胎产羔重和胎产活羔数的遗传力分别为0.007、0.014、0.006、0.012,均表现为低遗传力;繁殖性状间的遗传相关系数范围为-0.962~0.745,其中胎产羔数和胎产活羔数与胎平均初生重均呈较强负相关(-0.962和-0.605),其余性状间均呈现正相关。可见,上述天目多胎羊繁殖性状均为低遗传力性状,提高产羔数引起的低初生重可通过饲养管理进行弥补,这有益于新品种的选育。

上海轨道交通30年客流特征分析

上海的轨道交通始建于20世纪90年代,经过30年的建设和发展,目前已经形成了约800 km的超大网络,地铁运营里程位居世界首位,2019年前网络客流规模已经超过日均1000万乘次,在城市交通中的地位日益突出。为了更好地反映轨道交通与城市发展的关系,为正在开展的轨道交通线网优化和深化研究提供启示和借鉴,通过分析上海轨道交通30年客流特征的变化,反映不同阶段的轨道交通网络与城市格局演变的相互关系,进而重点阐述现状轨道交通不同类型线路的客流特征,总结当前网络中存在的一些问题,并提出未来提升客流效益的建议。

肺癌人工智能细胞病理诊断系统的研发及诊断价值探讨

背景传统细胞病理诊断肺癌虽具有优势,但受医师主观经验和工作负荷影响较大。以深度学习算法模型为代表的新一代人工智能,能够自动提取和归纳医学图像中的特征,在智能诊断中展现出显著优势。目的结合人工智能和数字病理学新技术,研发适用于肺癌的人工智能细胞病理诊断系统并对其诊断价值进行评价。方法选取解放军总医院第一医学中心2021年5月—2023年7月临床拟诊肺癌患者533例,其中最终病理确诊肺癌354例(包括腺癌98例、鳞癌140例、小细胞癌116例),非肺癌179例。将选取病例的气管镜活检标本及胸腔积液标本进行涂片、染色、扫描。使用随机选取的340例样本(肺癌病例229例和非肺癌病例111例)的数字病理切片分别对备选的检测模型和分类模型进行训练、验证及测试,根据测试结果,择优选取YOLO v7检测模型及Vision Transformer分类模型为基本架构初步建立肺癌人工智能细胞病理诊断系统。利用训练过的人工智能细胞病理诊断系统对剩下的193例未经训练的样本进行诊断测试,以病理学诊断结果为标准比较判读结果。结果本研究研发的人工智能细胞病理诊断系统在肺癌诊断中的准确率为91.2%(176/193),敏感度为98.4%(123/125),特异度为77.9%(53/68),阳性预测值为89.1%(123/138),阴性预测值为96.4%(53/55),Youden指数为0.763,Kappa值为0.798。结论人工智能细胞病理诊断系统对肺癌的诊断敏感度和准确率均较高,可有效提高肺癌诊断效率,但该系统仍需进一步优化,从而提高诊断特异度。

镉胁迫对不同品种白菜生长生理及亚细胞分布的影响

为了解镉胁迫对不同品种白菜生长生理、亚细胞分布的影响,采用盆栽试验的方法,设置不同镉浓度处理,研究贵州常栽的三个品种白菜生长、生理及亚细胞分布差异。结果显示:镉胁迫下,春信火锅王生长状态较好,且总体表现为低浓度促进,高浓度抑制的规律(地上部干重在迟白二号上的表现除外)。白菜叶绿素含量(SPAD)总体呈先增加后降低的趋势,叶绿素的最大值体现在春信火锅王上,迟白二号各部位镉含量与叶绿素含量呈显著负相关关系;植物络合素(PCs)浓度总体呈升高-降低-升高的趋势,春信火锅王地上部镉含量和可溶性组分镉含量与PCs呈显著负相关关系。三个品种白菜各部位的镉含量均随外源镉增加显著增加(P<0.05),表现为地上部>根部。不同品种白菜富集转运能力有较大差异,表现为青脆迟白菜>迟白二号>春信火锅王。三个品种白菜地上部鲜质量与有效态镉均具有显著负相关关系。不同浓度镉处理下白菜叶片镉的亚细胞分布规律总体上为细胞壁>可溶性组分>细胞器,但随镉处理浓度增大,细胞壁组分镉的占比降低,可溶性部分镉占比增大甚至超过细胞壁镉含量占比。综上,本研究三个品种白菜中,春信火锅王有较强的耐镉能力,适合在镉高背景地区种植。

缩比电容器装置噪声特性及其影响因素研究

滤波电容器装置作为换流站主要噪声源之一,对换流站周边的噪声影响尤为显著。为准确掌握滤波电容器装置的噪声特性,排除现场测量时其他声源的干扰,文中利用电容器单元组成缩比电容器装置,在半消声室内对其进行了噪声测量,总结分析了噪声的频谱特性,并对空间分布特性进行了讨论,发现缩比电容器装置的噪声辐射具有明显的方向性和对称性。此外,通过改变加载条件和布置方式进行了噪声特性的影响因素分析,结果表明:同样加载条件下平卧时装置非套管侧的声压级会更高;电容器单元数量减少一半,声压级约下降3 dB,但非套管侧声压级会出现“饱和”现象;当底面间距、侧面间距约为3/4声波波长时,装置套管侧方向有对应频率声压级的极小值。研究结果为电容器装置的噪声评估和降噪设计提供了基础数据支持,存在参考借鉴的意义。