595 nm PDL与1064 nm Nd:YAG激光联合治疗婴儿尿布区溃疡性血管瘤疗效分析

目的:评价595 nm PDL与1064 nm Nd:YAG激光联合治疗婴儿尿布区溃疡性血管瘤的疗效及安全性。方法:针对尿布区域溃疡性血管瘤患者,溃疡创面采用PDL治疗,光斑直径7 mm,脉宽1.5 ms,能量密度7~9 J/cm^(2),每周重复治疗1次。非溃疡部分采用PDL和1064 nm Nd:YAG激光模式联合治疗。激光参数如下,PDL采用7 mm光斑,脉宽6 ms,能量密度12 J/cm^(2),Nd:YAG脉宽45 ms,能量密度30~40 J/cm^(2),每两周进行1次。结果:共治疗32例患者,溃疡面治疗1周后,有9例患者开始愈合,治疗2周后进行随访,有28例患者溃疡面逐渐愈合。非溃疡处皮损经2~6次治疗后,29例患者皮疹消退60%以上。3例溃疡面较大者出现明显瘢痕。结论:595 nm PDL与1064 nm Nd:YAG激光联合治疗婴儿尿布区溃疡性血管瘤安全有效。

基于JAK2/STAT3/PDL1通路研究白术内酯Ⅱ对肺癌小鼠细胞凋亡的影响

通过观察白术内酯Ⅱ(atractylenolideⅡ,AT-Ⅱ)对Lewis肺癌小鼠JAK2/STAT3/PDL1通路的影响,探究其对小鼠肿瘤组织细胞凋亡的作用机制。建立肺癌小鼠模型,成瘤后,将小鼠随机分为4组,即模型组、白术内酯Ⅱ低、中、高剂量组,每组10只。白术内酯Ⅱ低、中、高剂量组灌胃0.2 mL白术内酯Ⅱ(剂量依次为25、50、100 mg/kg),1次/d,模型组灌胃等体积溶剂,1次/d。各组连续干预21 d,末次给药后24 h,处死小鼠,分离肿瘤组织、脾组织。观察各组肿瘤体积随时间变化,计算脾指数、肿瘤生长抑制率;采用TUNEL荧光染色法观察各组肿瘤组织细胞凋亡情况;采用Western blot法测定肿瘤组织JAK2、p-JAK2、STAT3、p-STAT3、PDL1蛋白表达情况;免疫荧光法测定p-JAK2、p-STAT3、F4/80^(+)、CD206^(+)表达。于脾指数而言,给药组与模型组差异无统计学意义(P>0.05);与模型组相比,白术内酯Ⅱ低、中、高剂量组的肿瘤体积、肿瘤质量显著减小(P<0.05);肿瘤生长抑制率明显提高;TUNEL法荧光染色显示:与模型组相比,白术内酯Ⅱ低剂量组细胞凋亡指数差异无统计学意义(P>0.05),白术内酯Ⅱ中剂量组细胞凋亡指数升高(P<0.05),白术内酯Ⅱ高剂量组细胞凋亡指数显著升高(P<0.01);Western blot实验结果显示:给药组肿瘤组织中p-JAK2、p-STAT3、PDL1蛋白的表达较模型组显著降低;免疫荧光实验测定p-JAK2、p-STAT3、CD206^(+)给药组显著降低(P<0.01)、F4/80^(+)无显著差异(P>0.05)。以上实验结果表明AT-Ⅱ能够基于JAK2/STAT3通路调控PDL1表达,影响Lewis肺癌小鼠肿瘤组织细胞凋亡。

AF患者LAAO术前LAA开口参数与术中置入封堵器尺寸的相关性及术后PDL发生的影响因素分析

目的分析心房颤动(AF)患者左心耳封堵(LAAO)术前左心耳(LAA)开口参数与术中置入封堵器尺寸的相关性及术后器械周围残余分流(PDL)发生的影响因素。方法回顾性分析2019年1月至2022年12月于山西医科大学第二医院成功实施LAAO术的83例非瓣膜性AF患者的临床资料。根据术后PDL发生情况将其分为PDL组(23例)和无PDL组(60例)。比较两组患者的临床资料和LAA开口参数。采用Pearson相关分析无PDL组LAA开口参数与术中置入封堵器尺寸的相关性。采用logistic回归分析术后PDL发生的影响因素。结果PDL组年龄显著小于无PDL组(P<0.05),两组性别、合并基础疾病情况比较差异无统计学意义(P>0.05)。PDL组LAA开口长径、短径、周长、面积大于无PDL组,差异有统计学意义(P<0.05)。Pearson相关分析结果显示,无PDL组LAA开口长径、短径、周长、面积与置入封堵器尺寸呈正相关(P<0.05)。多因素logistic回归分析结果显示,较大的年龄是术后PDL发生的独立保护因素,较大的LAA开口短径是术后PDL发生的独立危险因素(P<0.05)。结论LAA开口参数与封堵器尺寸呈正相关,其中LAA开口面积与封堵器尺寸的相关性最好,可为临床上封堵器的选择提供指导作用。较大的年龄是LAAO术后PDL发生的独立保护因素,较大的LAA开口短径是LAAO术后PDL发生的独立危险因素。

Effects of retained dry material on the impact,overflow and landing dynamics

During long-term operation,the performance of obstacles would be changed due to the material accumulating upslope the obstacle.However,the effects of retained material on impact,overflow and landing dynamics of granular flow have not yet been elucidated.To address this gap,physical flume tests and discrete element simulations are conducted considering a range of normalized deposition height h0/H from 0 to 1,where h0 and H represent the deposition height and obstacle height,respectively.An analytical model is modified to evaluate the flow velocity and flow depth after interacting with the retained materials,which further serve to calculate the peak impact force on the obstacle.Notably,the computed impact forces successfully predict the experimental results when a≥25°.In addition,the results indicate that a higher h0/H leads to a lower dynamic impact force,a greater landing distance L,and a larger landing coefficient Cr,where Cr is the ratio of slope-parallel component of landing velocity to flow velocity just before landing.Compared to the existing overflow model,the measured landing distance L is underestimated by up to 30%,and therefore it is insufficient for obstacle design when there is retained material.Moreover,the recommended Cr in current design practice is found to be nonconservative for estimating the landing velocity of geophysical flow.This study provides insightful scientific basis for designing obstacles with deposition.

PD-1/PDL-1抑制剂在头颈鳞癌中的研究现状

头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)是常见的恶性肿瘤,复发转移是其治疗失败的根本原因。随着近年来免疫治疗的探索,尤其是PD-1/PD-L1抑制剂的临床应用,已在多种恶性肿瘤中证明了其有效性和安全性。在复发/转移性(recurrent/metastatic,R/M)HNSCC中,指南推荐帕博利珠单抗和纳武利尤单抗作为一线治疗的选择方案。尽管免疫疗法在HNSCC中取得了初步胜利,但因其临床应用响应率低、免疫应激、耐药等问题,在治疗上仍极具挑战。如何实现精准免疫治疗获益仍是目前亟需探索新的治疗模式。通过研究PD-1/PD-L1通路有助于了解免疫治疗的作用机制,发掘更多的潜在获益人群,探索新治疗策略。因此,本文就PD-1/PD-L1抑制剂在HNSCC中的临床应用现状做一综述,为临床治疗策略提供参考。

腹膜纤维化与血浆/腹透液中分泌型PDL1水平的相关性研究

目的探讨免疫检查点程序性细胞死亡配体1(PDL1)的分泌形式可溶性细胞程序性死亡配体1(sPDL1)与腹膜纤维化(PF)进展的相关性。方法对不同腹膜透析(PD)时长、不同PF程度的PD患者进行观察,检测PD脱落细胞PDL1表达、血浆和PD液中的sPDL1分泌情况;使用腹膜间皮细胞(HPMC)建立高糖纤维化模型并用慢病毒进行PDL1下调处理,评估PDL1/sPDL1与间皮细胞转分化的相关性。结果PD治疗之后sPDL1显著上调;与PD液sPDL1相比,血浆sPDL1与原发疾病等因素具有相关性;PD液sPDL1与PF水平呈正相关;高水平sPDL1患者更易进入腹膜功能下一阶段;PD液sPDL1与脱落细胞PDL1表达呈正相关;在高糖刺激下,PDL1及sPDL1在HPMC中的表达显著升高,随后α-SMA和snail的表达上调;慢病毒下调PDL1及sPDL1后,间皮细胞α-SMA及snail相应下调。结论PD液sPDL1与PD治疗的相关性较高;PD液sPDL1的增高可能为纤维化的早期征兆,提示腹膜溶质转运功能的升高;高糖诱导下,sPDL1在HPMC中过表达,促进细胞转分化,诱导PF的进展。

Stability Analysis of Nonlinear Models of Nose Landing Gear Shimmy

Shimmy can reduce the service life of the nose landing gear, affect ride comfort, and even cause fuselage damage leading to aircraft crashes. Taking a light aircraft as the research object, the torsional freedom of landing gear around strut axis and lateral deformation of tire are considered. Since the landing gear shimmy is a nonlinear system, a nonlinear mechanical model of the front landing gear shimmy is established. Sobol index method is proposed to analyze the influence of structural parameters on the stability region of the nose landing gear, and Routh-Huritz criterion is used to verify the reliability of the analysis results of Sobol index method. We analyse the effect of torsional stiffness of strut, caster length, rated initial tire inflation pressure, rake angle, and vertical force on the stability region of theront landing gear. And the research shows that the optimization of the torsional stiffness of the strut and the caster length of the nose landing gear should be emphasized, and the influence of vertical force on the stability region of the nose landing gear should be paid attention to.

白术内酯Ⅱ逆转M2型巨噬细胞极化调控PDL1表达抑制A549细胞迁移

探究白术内酯Ⅱ(atractylenolideⅡ,AT-Ⅱ)对M2型巨噬细胞极化与A549细胞迁移能力的影响,并分析其潜在机制。利用PMA将THP-1细胞诱导成M0巨噬细胞,然后加入IL-4和IL-13继续诱导为M2型巨噬细胞。利用Transwell小室将M2型巨噬细胞与A549细胞共培养,分别给予0、2.5、5μmol/L的AT-Ⅱ进行作用。采用MTT实验测定共培养条件下AT-Ⅱ对A549细胞活力的影响;采用Real-time PCR检测M2型巨噬细胞Arg-1的mRNA表达水平;采用ELISA检测共培养体系中TNF-α、IL-1β的含量;采用WB检测A549细胞TLR4、p-p65、NF-κB(p65)、PDL1的蛋白表达水平;采用划痕实验检测A549细胞的迁移能力。结果显示,共培养条件下,与对照组相比,实验组(2.5、5μmol/L)A549细胞活力降低(2.5μmol/L组P>0.05、5μmol/L组P<0.01);M2型巨噬细胞特异性基因Arg-1的mRNA表达水平显著降低(P<0.01);M1型巨噬细胞相关炎性因子TNF-α、IL-1β含量增多但无显著差异(P>0.05);A549细胞TLR4/NF-κB信号通路相关蛋白TLR4、p-p65、NF-κB(p65)蛋白表达水平降低(P<0.01);A549细胞PDL1蛋白表达水平显著降低(P<0.01),A549细胞迁移能力下降。以上结果表明,AT-Ⅱ可以逆转M2型巨噬细胞极化,抑制A549细胞TLR4/NF-κB信号通路降低PDL1的表达水平,从而抑制肺癌细胞的迁移。

NLR和SII对PD1/PDL1抑制剂治疗晚期子宫内膜癌患者预后的预测价值

目的 研究中性粒细胞-淋巴细胞比率(NLR)和系统免疫炎症指数(SII)对PD1/PDL1抑制剂治疗晚期子宫内膜癌(EC)患者预后的预测价值。方法 选取2019年11月—2021年11月就诊的146例晚期EC,收集其临床病理资料;以无进展生存期为标准,绘制受试者工作特征(ROC)曲线,计算NLR和SII的最佳截断值,根据最佳截断值分为H/L-NLR组、H/L-SII组,计算各组治疗客观缓解率和疾病控制率,绘制生存曲线评价NLR、SII对PD1/PDL1抑制剂治疗晚期EC患者生存的影响。结果 ROC曲线分析结果显示,当NLR最佳截断值为5.71时,诊断敏感度为52.1%,特异度为79.1%;当SII最佳截断值为803.23时,诊断敏感度为85.1%,特异度为59.9%。L-NLR组和L-SII组疾病控制率分别高于H-NLR组和H-SII组(P<0.01)。L-NLR组和L-SII组中位生存期显著长于H-NLR组和H-SII组。结论 NLR和SII预测PD1/PDL1抑制剂治疗晚期EC患者的价值较高,低于最佳截断值的NLR和SII患者预后较好。

Study of the inflammatory activating process in the early stage of Fusobacterium nucleatum infected PDLSCs

Fusobacterium nucleatum(F.nucleatum)is an early pathogenic colonizer in periodontitis,but the host response to infection with this pathogen remains unclear.In this study,we built an F.nucleatum infectious model with human periodontal ligament stem cells(PDLSCs)and showed that F.nucleatum could inhibit proliferation,and facilitate apoptosis,ferroptosis,and inflammatory cytokine production in a dose-dependent manner.The F.nucleatum adhesin Fad A acted as a proinflammatory virulence factor and increased the expression of interleukin(IL)-1β,IL-6 and IL-8.Further study showed that Fad A could bind with PEBP1 to activate the Raf1-MAPK and IKK-NF-κB signaling pathways.Time-course RNA-sequencing analyses showed the cascade of gene activation process in PDLSCs with increasing durations of F.nucleatum infection.NFκB1 and NFκB2 upregulated after 3 h of F.nucleatum-infection,and the inflammatory-related genes in the NF-κB signaling pathway were serially elevated with time.Using computational drug repositioning analysis,we predicted and validated that two potential drugs(piperlongumine and fisetin)could attenuate the negative effects of F.nucleatum-infection.Collectively,this study unveils the potential pathogenic mechanisms of F.nucleatum and the host inflammatory response at the early stage of F.nucleatum infection.

Phenomenology of plume-surface interactions and preliminary results from the Tianwen-1 landing crater on Mars

The plume-surface interaction(PSI)is a common phenomenon that describes the environment surrounding the landers resulting from the impingement of hot rocket exhaust on the regolith of planetary bodies.The PSI will cause obscuration,erosion of the planetary surface,and high-speed spreading of dust or high-energy ejecta streams,which will induce risks to a safe landing and cause damage to payloads on the landers or to nearby assets.Safe landings and the subsequent scientific goals of deep-space exploration in China call for a comprehensive understanding of the PSI process,including the plume flow mechanics,erosion mechanism,and ejecta dynamics.In addition,the landing crater caused by the plume provides a unique and insightful perspective on the understanding of PSI.In particular,the PSI can be used directly to constrain the composition,structure,and mechanical properties of the surface and subsurface soil.In this study,we conducted a systematic review of the phenomenology and terrestrial tests of PSI:we analyzed the critical factors in the PSI process and compared the differences in PSI phenomena between lunar and Martian conditions;we also reviewed the main erosion mechanisms and the evolution and development of terrestrial tests on PSI.We discuss the problems with PSI,challenges of terrestrial tests,and prospects of PSI,and we show the preliminary results obtained from the landing crater caused by the PSI of Tianwen-1.From analysis of the camera images and digital elevation model reconstructions,we concluded that the landing of Tianwen-1 caused the deepest crater(depth>40 cm)on a planetary surface reported to date and revealed stratigraphic layers in the subsurface of Martian soil.We further constrained the lower bounds of the mechanical properties of Martian soil by a slope stability analysis of the Tianwen-1 landing crater.The PSI may offer promising opportunities to obtain greater insights into planetary science,including the subsurface structure,mineral composition,and properties of soil.

Autonomous landing scene recognition based on transfer learning for drones

In this paper, we study autonomous landing scene recognition with knowledge transfer for drones. Considering the difficulties in aerial remote sensing, especially that some scenes are extremely similar, or the same scene has different representations in different altitudes, we employ a deep convolutional neural network(CNN) based on knowledge transfer and fine-tuning to solve the problem. Then, LandingScenes-7 dataset is established and divided into seven classes. Moreover, there is still a novelty detection problem in the classifier, and we address this by excluding other landing scenes using the approach of thresholding in the prediction stage. We employ the transfer learning method based on ResNeXt-50 backbone with the adaptive momentum(ADAM) optimization algorithm. We also compare ResNet-50 backbone and the momentum stochastic gradient descent(SGD) optimizer. Experiment results show that ResNeXt-50 based on the ADAM optimization algorithm has better performance. With a pre-trained model and fine-tuning, it can achieve 97.845 0% top-1 accuracy on the LandingScenes-7dataset, paving the way for drones to autonomously learn landing scenes.

Indirect contact matters:Mid-flight external trunk perturbation increased unilateral anterior cruciate ligament loading variables during jump-landings

Purpose:To determine the effect of unanticipated mid-flight medial-lateral external perturbation of the upper or lower trunk on anterior cruciate ligament(ACL)loading variable s during jump-landings.Methods:Thirty-two participants performed double-leg vertical jump-landings while bilateral kinematics and kinetics were collected under 6conditions(upper or lower trunk perturbation locations;no,left,or right perturbation directions).Two customized catapult apparatuses were created to apply pushing perturbation to participants near the maximal jump height.Results:The ball contacted participants near the center of mass for the lower-trunk conditions and approximately 23 cm above the center of mass for the upper-trunk conditions.Under upper-trunk perturbation,the contralateral leg demonstrated significantly smaller knee flexion angles at initial contact and greater peak knee abduction angles,peak vertical ground reaction forces,peak knee extension moments,and peak knee adduction moments compared to other legs among all conditions.Under lower-trunk perturbation,the contralateral leg showed significantly smaller knee flexion angles at initial contact and increased peak vertical ground reaction forces and peak knee extension moments compared to legs in the no-perturbation conditions.Conclusion:Mid-flight external trunk pushing perturbation increased ACL loading variables for the leg contralateral to the perturbation.The uppertrunk perturbation resulted in greater changes in ACL loading variables compared to the lower-trunk perturbation,likely due to trunk and ipsilateral leg rotation and more laterally located center of mass relative to the contralateral leg.These findings may help us understand the mechanisms of indirect-contact ACL injuries and develop jump-landing training strategies under mid-flight trunk perturbation to better prevent ACL injury.

PD-1/PDL-1治疗的肺癌患者衰弱现状及影响因素分析

目的:调查了解PD-1/PDL-1治疗的肺癌患者衰弱现状,并分析其影响因素。方法:采用一般情况调查表、微型营养评定法简版、Barthel指数、中文版格列宁根衰弱指标量表、安德森症状评估量表修订版对天津市某三级甲等肿瘤专科医院接受PD-1/PDL-1治疗的190例肺癌患者进行横断面调查。结果:190例患者中,发生衰弱57例(30.0%),23例(12.1%)患者处于衰弱前期,未发生衰弱者110例(57.9%)。Lasso回归结果显示,Barthel指数、营养分数、有睡眠问题、合并症数量、症状分数、疲乏、苦恼、健忘、悲伤、便秘和体质量下降是PD-1/PDL-1治疗的肺癌患者衰弱发生的影响因素。结论:PD-1/PDL-1治疗的肺癌患者衰弱发生率较高,应关注自理能力差、营养不良、有睡眠问题、合并症数量≥2以及症状分数高的患者,采取有针对性的干预措施来积极应对,预防或是延缓PD-1/PDL-1治疗的肺癌患者衰弱的发生与发展。

盐碱地肥沃耕层构建水肥盐综合调控机理与技术研究进展

盐碱地是我国重要的后备耕地资源,我国历来高度重视盐碱地的改良和利用工作,但目前盐碱区淡水资源短缺严重制约了盐碱地的改良利用。如何在水资源约束下,优化调控土壤水肥盐动态是当前盐碱地可持续利用中亟待解决的关键科学问题。近年来,大量研究利用有机培肥、耕作、节水灌溉、田间覆盖、咸水利用等农艺措施,在盐碱地建立“控盐、保肥、保水”的肥沃耕作层,显著改变了水肥盐在土壤-植物-大气连续体中的运移过程,实现了盐碱地质量和产能快速提升,上述内容也日益成为盐碱地改良利用中的重要研究方向。本文系统总结了盐碱地改良和肥沃耕层构建等方面的研究进展,并针对盐碱地肥沃耕层构建下土壤水肥盐综合调控及其与植物生长的协同关系等进行了展望,以期为盐碱地可持续改良利用提供参考。

我国沿海滩涂盐碱地改良与综合利用现状与展望

沿海滩涂盐碱地是我国重要的后备土地资源,其生态生产力价值是沿海“蓝碳”的重要组成部分。针对长期以来沿海地区盐碱地综合利用效率低下和经济、生态、社会效益不高等问题,本文通过梳理沿海滩涂开发的历史和现状,总结不同改良方式主导的滩涂盐碱地利用方式的转变,评估滩涂盐碱地的生态生产力价值,分析滩涂盐碱地利用亟需解决的问题,以期为新时期我国沿海滩涂盐碱地的改良与综合利用提供参考。

595 nm脉冲染料激光器治疗婴幼儿浅表血管瘤的临床疗效及影响因素分析

目的:回顾性研究Vbeam 595 nm脉冲染料激光器(PDL)治疗婴幼儿血管瘤(IHs)中期临床效果,分析探索其可能的影响因素。方法:收集2020年1月至2022年12月唐山市妇幼保健院行PDL治疗的219例IHs患儿,并至少随访6个月,分析治疗效果与月龄、血管瘤部位、厚度及治疗次数等之间的关系。结果:219例患儿总体中位月龄7个月,平均月龄(4~10)个月,总计219处病损。月龄、病损特征等一般资料在性别间差异无统计学意义(P>0.05)。治疗总体有效率92.7%,中位治疗次数3次,平均(2~4)次。男女性别间比较、治疗次数及治疗结局差异无统计学意义(P>0.05)。疗效差的6人,月龄13(8,19)个月;疗效一般的10人,月龄13(8,14)个月;疗效好的31人,月龄8(4,10)个月;疗效优的172人,月龄6(4,9)个月;不同疗效患儿间月龄差异具有统计学意义(Z=24.863,P<0.001),疗效优的患儿月龄较小。血管瘤患儿的治疗结局与其病变厚度、面积大小及治疗次数有相关性(r=-0.32、-0.46、-0.46,P<0.05),治疗有效主要集中在2~4次的治疗中。治疗引起的不良反应为皮肤红斑,总体半年后残留并发症率为5.48%。结论:595 nm PDL联合动态冷却装置(DCD)治疗为IHs提供了一种安全、有效的治疗方式,在早期对IHs进行干预,可以提高治疗效果,减少治疗疗程,从而进一步减少相应并发症可能。

黄河流域(山东段)工业用地错配时空格局与应对策略

以黄河流域(山东段)9个设区市所辖77个区县为研究单元,利用2011—2020年山东省供地信息库中的工业用地供应数据,以及同期工业经济统计数据,分析黄河流域(山东段)工业用地供应与工业利润总额时空变化特征,通过空间错配指数分析工业用地错配时空格局,并从科学配置、存量挖潜、提质增效和层级协同4个方面提出应对策略。研究对于实现黄河流域(山东段)土地资源高效利用与聚集区域高质量发展具有重要意义。

湖南耕地土壤和稻米重金属污染防控实践与思考

湖南省是我国主要产粮区之一。由于矿产经济活动及其他人类活动,大面积耕地土壤受到重金属污染,从而一些地方的稻米重金属含量超过国家食品卫生标准。本研究对湖南省耕地土壤与稻米重金属污染现状和成因进行剖析。结果表明:湖南耕地土壤重金属污染特征是复合污染为主,污染程度逐年上升,主要分布在湘江流域和工矿区,并逐渐蔓延至养殖区,稻米重金属污染主要以Cd为主,其次是As和Pb。针对湖南稻米重金属污染的各种防控措施,阐述其工作原理、应用实例和优缺点,然后对湖南省开展的土壤重金属污染修复措施和研究进行总结与思考,提出应当构建一种基于土壤组成的原味钝化材料耦合易操作农艺措施的经济、绿色、高效的综合性技术方案,以期来修复耕地土壤重金属污染和降低稻米重金属含量,保障粮食安全生产。

中国极端天气气候研究——“地球系统与全球变化”重点专项项目简介及最新进展

全球变暖背景下,极端天气气候事件频发,并表现出群发性、持续性、复合性等特点,不可预测性增加;持续性强降水、极端低温、复合型极端高温干旱、群发性热浪和台风等极端天气气候事件对我国经济社会和可持续发展影响巨大。然而,上述极端天气气候事件的新特征、关键过程和机理尚不完全清楚,重大极端事件的预报预测水平亟待提升。文章首先简要介绍“地球系统与全球变化”重点专项项目“中国极端天气气候事件的形成机理及其预测和归因”的基本情况。项目拟在分析全球变化背景下对我国造成重大影响的极端天气气候事件新特征的基础上,深入研究多尺度海-陆-气耦合过程影响极端天气气候事件的机理,挖掘极端天气气候事件次季节-季节预测的前兆信号;发展动力与物理统计相结合的极端事件预测新方法,研制针对中国极端事件的新一代高分辨率数值预报与检测归因系统。文章重点总结了自2022年12月项目立项至今取得的最新研究成果和进展。