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Noteworthy impacts of COVID-19 pandemic on cancer screening:A systematic review

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Fundamental Research 2024年第3期4卷 484-494页

作者： Huilin Wang min Yang Wei Xiong Quan Wang Bobo Zheng Yang Bai Kaiyong Zou Jibin Li Jiansong Ren Wanqing Chen Jingbo zhai Jiang Li Office for Cancer Screening National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Comprehensive Intervention National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Gynecology Endocrine&Reproductive Center National Clinical Research Center for Obstetric&Gynecologic Diseases Department of Obstetrics and GynecologyPeking Union Medical College HospitalPeking Union Medical College/Chinese Academy of Medical SciencesBeijing 100005China Ambulatory Surgery Center of Xijing Hospital Fourth Military Medical UniversityXi'an 710068China Department of General Surgery Shaanxi Provincial People’s HospitalXi'an 710068China College of Clinical Medicine Capital Medical UniversityBeijing 100069China School of Public Health Tianjin University of Traditional Chinese MedicineTianjin 301617China

The sudden onset of the coronavirus disease 2019(COVID-19)in January 2020 has affected essential global health ***-screening services that can reduce cancer mortality are strongly ***,the specific role of COVID-19 in cancer screening is not fully *** study aimed to assess the efficiency of global cancer screening programs before and during the COVID-19 pandemic and to promote potential cancer-screening strategies for the next *** searches in PubMed,Embase,and Web of Science,and manual searches were performed between January 1,2020 and March 1,*** studies that reported the number of participants who underwent cancer screening before and during the COVID-19 pandemic were *** methodological quality of the included studies was assessed using the Newcastle-Ottawa *** in cancer-screening rates were estimated using the incidence rate ratio(IRR).Fifty-five cohort studies were included in this *** screening rates of colorectal cancer using invasive screening methods(Pooled IRR=0.52,95%CI:0.42 to 0.65,p<0.01),cervical cancer(Pooled IRR=0.56,95%CI:0.47 to 0.67,p<0.01),breast cancer(Pooled IRR=0.57,95%CI:0.49 to 0.66,p<0.01)and prostate cancer(Pooled IRR=0.71,95%CI:0.56 to 0.90,p<0.01)during the COVID-19 pandemic were significantly lower than those before the COVID-19 *** screening rates of lung cancer(Pooled IRR=0.77,95%CI:0.58 to 1.03,p=0.08)and colorectal cancer using noninvasive screening methods(Pooled IRR=0.74,95%CI:0.50 to 1.09,p=0.13)were reduced with no statistical *** subgroup analyses revealed that the reduction in cancer-screening rates varied across *** results suggest that the COVID-19 pandemic has had a noteworthy impact on colorectal,cervical,breast,and prostate cancer *** innovative cancer-screening technologies is important to promote the efficiency of cancer-screening services in the post-COVID-19 era and prepare fo

关键词： Cancer screening COVID-19 pandemic Cohort study Incidence rate ratio Meta-analysis

异基因造血干细胞移植后CD4^+CD25^+调节性T细胞与移植物抗宿主病关系的研究

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临床荟萃 2008年第21期23卷 1524-1527页

作者：沈元元张爱梅李庆孙自敏翟志敏安徽医科大学附属省立医院中心实验室安徽合肥230001 安徽医科大学附属省立医院血液科安徽合肥230001

目的研究异基因造血干细胞移植(Allo-HSCT)后患者CD4+CD25+调节性T细胞(CD4+CD25+Treg)与急性移植物抗宿主病(aGVHD)、慢性移植物抗宿主病(cGVHD)的关系。方法采用流式细胞术检测50例Allo-HSCT后患者及24例健康者外周血CD4+CD25+Treg在C... 详细信息

目的研究异基因造血干细胞移植(Allo-HSCT)后患者CD4+CD25+调节性T细胞(CD4+CD25+Treg)与急性移植物抗宿主病(aGVHD)、慢性移植物抗宿主病(cGVHD)的关系。方法采用流式细胞术检测50例Allo-HSCT后患者及24例健康者外周血CD4+CD25+Treg在CD4+T细胞中的百分含量。结果50例患者均获得造血功能重建。正常对照组与无移植物抗宿主病(GVHD)组CD4+CD25高度敏感(CD4+CD25high)、CD4+CD25+CD127低度敏感(CD4+CD25+CD127low)T细胞百分比分别为(2.185±0.582)%和(6.365±2.155)%vs(2.320±2.813)%和(7.515±5.457)%(P>0.05)。aGVHD组为(1.270±1.385)%和(4.575±3.900)%,低于正常对照组与无GVHD组(均P<0.01);其中,Ⅱ~Ⅳ度aGVHD组显著低于Ⅰ度aGVHD组(P<0.01)。cGVHD组为(1.375±0.812)%和(5.620±1.770)%,低于无GVHD组(P<0.01);其中,广泛性cGVHD组低于局限性cGVHD组(P<0.05)。结论CD4+CD25+Treg的水平与Allo-HSCT后GVHD的发生及严重程度有密切关系;通过监测CD4+CD25+Treg水平对临床早期诊断GVHD及判断GVHD预后、指导免疫调节剂的应用具有重要意义。

关键词：白血病干细胞移植 T淋巴细胞,调节性移植物抗宿主病流式细胞术

尼美舒利对胆管癌细胞增殖及PCNA、Survivin蛋白表达的影响

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现代肿瘤医学 2008年第3期16卷 400-402页

作者：孔琦黄强翟志敏皖南医学院弋矶山医院普外三科安徽芜湖244100 安徽省立医院安徽合肥230000

目的:观察选择性环氧合酶-2(cyclooxygenase-2,COX-2)抑制剂尼美舒利对人胆管癌细胞系QBC939生长的抑制作用及Survivin基因表达的变化。方法:应用MTT比色法、细胞群体倍增时间观察尼美舒利对人胆管癌细胞QBC939增殖的影响,流式细胞仪检... 详细信息

目的:观察选择性环氧合酶-2(cyclooxygenase-2,COX-2)抑制剂尼美舒利对人胆管癌细胞系QBC939生长的抑制作用及Survivin基因表达的变化。方法:应用MTT比色法、细胞群体倍增时间观察尼美舒利对人胆管癌细胞QBC939增殖的影响,流式细胞仪检测细胞凋亡,免疫组织化学法观察尼美舒利对QBC939细胞PCNA,Survivin蛋白表达的影响。结果:尼美舒利呈时间、剂量依赖性抑制胆管癌增殖,高浓度(200μmol/L)尼美舒利不仅抑制胆管癌细胞增殖,而且诱导其凋亡。流式细胞仪研究显示,随药物浓度增加,细胞凋亡率显著增加。免疫组化结果显示尼美舒利处理后的QBC939细胞PCNA,Survivin蛋白的表达明显减弱。结论:尼美舒利能抑制QBC939细胞增殖,诱导其凋亡,其机制可能与PCNA,Survivin蛋白的表达下调有关。

关键词：胆管肿瘤药物筛选实验抗肿瘤脂氧合酶抑制剂

Dynamic properties of rumor propagation model induced by L´evy noise on social networks

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Chinese Physics B 2024年第9期33卷 223-237页

作者： Ying Jing Youguo Wang Qiqing zhai Xianli Sun School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Telecommunication and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China

Social networks are inevitably subject to disruptions from the physical world,such as sudden internet outages that sever local connections and impede information *** Gaussian white noise,commonly used to simulate stochastic disruptions,only fluctuates within a narrow range around its mean and fails to capture large-scale variations,L´evy noise can effectively compensate for this ***,a susceptible–infected–removed rumor propagation model with L´evy noise is constructed on homogeneous and heterogeneous networks,***,the existence of a global positive solution and the asymptotic path-wise of the solution are derived on heterogeneous networks,and the sufficient conditions of rumor extinction and persistence are ***,theoretical results are verified through numerical calculations and the sensitivity analysis related to the threshold is conducted on the model *** simulation experiments on Watts–Strogatz(WS)and Barab´asi–Albert networks,it is found that the addition of noise can inhibit the spread of rumors,resulting in a stochastic resonance phenomenon,and the optimal noise intensity is obtained on the WS *** validity of the model is verified on three real datasets by particle swarm optimization algorithm.

关键词： rumor propagation model L´evy noise extinction and persistence stochastic resonance

外周血中间型单核细胞增多与弥漫大B细胞淋巴瘤疾病进展的相关性研究

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中国实验血液学杂志 2022年第4期30卷 1116-1122页

作者：胡泉泉王会平顾康生翟志敏李延莉安徽医科大学基础医学院病理解剖学教研室安徽合肥230032 安徽医科大学第二附属医院血液科安徽合肥230601 安徽医科大学第一附属医院肿瘤科安徽合肥230022 安徽医科大学第一附属医院病理科安徽合肥230022

目的:探讨弥漫大B细胞淋巴瘤(DLBCL)患者外周血单核细胞亚群变化及临床意义。方法:采用流式细胞术检测82例DLBCL患者(包括32例初诊、29例缓解以及21例复发)和30例健康对照者外周血单核细胞亚群百分比,并分析其与DLBCL患者临床特征的相... 详细信息

目的:探讨弥漫大B细胞淋巴瘤(DLBCL)患者外周血单核细胞亚群变化及临床意义。方法:采用流式细胞术检测82例DLBCL患者(包括32例初诊、29例缓解以及21例复发)和30例健康对照者外周血单核细胞亚群百分比,并分析其与DLBCL患者临床特征的相关性及其诊断价值。结果:与健康对照组相比,DLBCL初诊组患者中间型单核细胞亚群占总单核细胞比例明显升高(t=5.888,P<0.01)。DLBCL复发组患者中间型单核细胞亚群所占比例明显高于初诊组(t=2.106,P=0.04)和缓解组(t=6.882,P<0.01),并且初诊组患者中间型单核细胞亚群比例高于缓解组(t=3.969,P<0.01)。随着国际预后指数(IPI)评分的升高,DLBCL患者的中间型单核细胞亚型百分比增多(r=0.37)。当截点值为中间型单核细胞比例10.91%时,整体样本作为早期诊断指标的灵敏度和特异度分别为90.60%和91.00%。结论:DLBCL患者疾病进展与中间型单核细胞增多相关,可作为DLBCL潜在的诊断指标。

关键词：弥漫大B细胞淋巴瘤中间型单核细胞流式细胞术疾病进展诊断指标

Elemental Compositions of Clinopyroxenes from Southern Okinawa Trough Basalt:Implications for Magmatism and Structural Environment in an Initial Back-Arc Basin

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Journal of Ocean University of China 2024年第3期23卷 643-653页

作者： GUO Kun zhai Shikui FAN Di ZHANG Xia ZHANG Yu ZHU zhimin Laoshan Laboratory Qingdao 266237China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationCollege of Marine GeosciencesOcean University of ChinaQingdao 266100China Key Laboratory of Submarine Geosciences&Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China

The major and trace elemental compositions of clinopyroxene from basalt were used to characterize the nature of the primitive magma and structural environment beneath the southern Okinawa Trough(SOT),which is an initial back-arc basin at a continental *** clinopyroxenes in the basalt were augite with variable Mg^(#)contents(73.37-78.22).The regular variations in major oxide contents(i.e.,CaO,FeO,TiO_(2),and Cr)with decreasing Mg#implied that the clinopyroxenes evolved from being enriched in Mg,Ca,and Cr to being enriched in Fe and *** clinopyroxenes had relatively low rare earth element concentrations(7.51×10^(-6) to 12.68×10^(-6))and negative Eu anomalies(δEu=0.67-0.95).The Kd_(cpx) values of clinopyroxenes(0.2-0.26),which were used to examine whether the clinopyroxene was equilibrated with its host basalt,demonstrate that these clinopyroxene phenocrysts were not captured crystals but were instead produced by crystallization differentiation of the *** calculated clinopyroxene crystallization temperatures showed a narrow range of 990-1061℃,and their crystallization pressures ranged from 2.0 to 3.2 *** geochemistry features of these clinopyroxenes indicated that the parent magma belonged to the subalkaline tholeiitic magma series and suggested that the magma experienced crystallization differentiation of olivine,plagioclase,and clinopyroxene,where the crystallization of plagioclase occurred earlier than that of *** with geophysical data,this research on primitive magma and its crystallization differentiation from clinopyroxene indicates that the SOT is in the stage of‘seafloor spreading’and that basaltic rocks produced from tholeiitic magma represent the generation of oceanic crust.

关键词： trace elements clinopyroxenes southern Okinawa Trough seafloor spreading back-arc basin

Overhead-free Noise-tolerant Federated Learning: A New Baseline

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Machine Intelligence Research 2024年第3期21卷 526-537页

作者： Shiyi Lin Deming zhai Feilong Zhang Junjun Jiang Xianming Liu Xiangyang Ji Department of Computer Science and Technology Harbin Institute of TechnologyHarbin150000China Department of Automation Tsinghua UniversityBeijing100084China

Federated learning (FL) is a promising decentralized machine learning approach that enables multiple distributed clients to train a model jointly while keeping their data private. However, in real-world scenarios, the supervised training data stored in local clients inevitably suffer from imperfect annotations, resulting in subjective, inconsistent and biased labels. These noisy labels can harm the collaborative aggregation process of FL by inducing inconsistent decision boundaries. Unfortunately, few attempts have been made towards noise-tolerant federated learning, with most of them relying on the strategy of transmitting overhead messages to assist noisy labels detection and correction, which increases the communication burden as well as privacy risks. In this paper, we propose a simple yet effective method for noise-tolerant FL based on the well-established co-training framework. Our method leverages the inherent discrepancy in the learning ability of the local and global models in FL, which can be regarded as two complementary views. By iteratively exchanging samples with their high confident predictions, the two models “teach each other” to suppress the influence of noisy labels. The proposed scheme enjoys the benefit of overhead cost-free and can serve as a robust and efficient baseline for noise-tolerant federated learning. Experimental results demonstrate that our method outperforms existing approaches, highlighting the superiority of our method.

关键词： Federated learning noise-label learning privacy-preserving machine learning edge intelligence distributed machine learning

Modeling the Diffusion of New Energy Vehicles in China Considering Subsidy Policies

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Journal of Systems Science and Information 2024年第4期12卷 457-475页

作者： Lingling PEI Ruijin zhai minghuan SHOU Jingzhong LUO School of Management Zhejiang University of Finance & Economics School of Management Hangzhou Dianzi University

The new energy vehicle(NEV) subsidy policy introduced in China in 2013 has significantly boosted the adoption and sales of NEVs, with sales increasing more than 40-fold. However, the mechanisms by which subsidy policies influence the diffusion of NEVs in China remain unclear, posing challenges for governments to design future strategies. Thus, the primary objective of this paper is to empirically examine the impact of subsidy policy on the diffusion of new energy vehicles and to forecast future development trends using the grey Bass model, a predictive model suited for new product adoption forecasting. Our findings suggest that while the sales of NEVs in China will continue to rise,the growth rate will slow. Key milestones include the first inflection points for new energy vehicles and battery electric vehicles, anticipated in 2025 and 2024 respectively, with peak sales expected in 2028 and 2027. These insights are crucial for manufacturers, enabling them to adjust their production strategies timely and enhance their resilience in the market.

关键词： grey predictive model grey Bass model subsidy policy new energy vehicle battery electric vehicle

An observed nocturnal ozone transport event in the Sichuan Basin,Southwestern China

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Journal of Environmental Sciences 2024年第4期138卷 10-18页

作者： Ruyue Guo Guangming Shi Dan Zhang Yang Chen Chao Peng Chongzhi zhai Fumo Yang Department of Environmental Science and Engineering Sichuan UniversityChengdu 610065China College of Carbon Neutrality Future Technology Sichuan UniversityChengdu 610065China National Engineering Research Center on Flue Gas Desulfurization Chengdu 610065China Chongqing Academy of Eco-Environmental Science Chongqing 401147China Research Center for Atmospheric Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Key Laboratory for Urban Atmospheric Environment Integrated Observation&Pollution Prevention and Control of Chongqing Chongqing 401147China

The ozone(O_(3))pollution in China drew lots of attention in recent years,and the Sichuan Basin(SCB)was one of the regions confronting worsening O_(3)pollution *** previous studies have shown that regional transport is an important contributor to O_(3)***,very few features of the O_(3)profile during transport have been reported,especially in the border regions between different administrative *** this study,we conducted tethered balloon soundings in SCB during the summer of 2020 and captured a nocturnal O_(3)transport event during the ***,the O_(3)transport occurred in the bottom of the residual layer,between 200 and 500 m above ground ***,the transport pathway was directed from southeast to northwest based on the analysis of the wind field and air mass *** effect of transport in the residual layer on the surface O_(3)concentration was related to the spatial distribution of O_(3).For cities with high O_(3)concentrations in the upwind region,the transport process would bring clean air masses and abate *** downwind lightly polluted cities,the transport process would slow down the decreasing or even increase the surface O_(3)concentration during the *** provided observational facts on the profile features of a transboundary O_(3)transport event between two provincial administrative divisions,which implicated the importance of joint prevention and control ***,the sounding parameters were limited and the quantitative analysis was preliminary,more integrated,and thorough studies of this topic were called for in the future.

关键词： Ozone Sichuan basin Transport event Vertical profile