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A splicing algorithm for best subset selection in sliced inverse regression
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作者 Borui Tang Jin Zhu +1 位作者 Tingyin Wang Junxian Zhu 《中国科学技术大学学报》 北大核心 2025年第5期22-34,21,I0001,共15页
In this study,we examine the problem of sliced inverse regression(SIR),a widely used method for sufficient dimension reduction(SDR).It was designed to find reduced-dimensional versions of multivariate predictors by re... In this study,we examine the problem of sliced inverse regression(SIR),a widely used method for sufficient dimension reduction(SDR).It was designed to find reduced-dimensional versions of multivariate predictors by replacing them with a minimally adequate collection of their linear combinations without loss of information.Recently,regularization methods have been proposed in SIR to incorporate a sparse structure of predictors for better interpretability.However,existing methods consider convex relaxation to bypass the sparsity constraint,which may not lead to the best subset,and particularly tends to include irrelevant variables when predictors are correlated.In this study,we approach sparse SIR as a nonconvex optimization problem and directly tackle the sparsity constraint by establishing the optimal conditions and iteratively solving them by means of the splicing technique.Without employing convex relaxation on the sparsity constraint and the orthogonal constraint,our algorithm exhibits superior empirical merits,as evidenced by extensive numerical studies.Computationally,our algorithm is much faster than the relaxed approach for the natural sparse SIR estimator.Statistically,our algorithm surpasses existing methods in terms of accuracy for central subspace estimation and best subset selection and sustains high performance even with correlated predictors. 展开更多
关键词 splicing technique best subset selection sliced inverse regression nonconvex optimization sparsity constraint optimal conditions
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Peripheral blood lymphocyte subset deficiency in acute-on-chronic liver failure and reconstitution following liver transplantation
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作者 Bo Peng Zhi-Xin Li +8 位作者 Min Yang Kai Liu Xu-Yu Xiang Ying Zhang Jun-Hui Li Peng-Peng Zhang Quan Zhuang Ke Cheng Ying-Zi Ming 《World Journal of Gastroenterology》 2025年第43期101-111,共11页
BACKGROUND Patients with acute-on-chronic liver failure(ACLF)experience severe immune dysfunction.Liver transplantation(LT)significantly improves survival outcomes.However,the characteristics of peripheral blood lymph... BACKGROUND Patients with acute-on-chronic liver failure(ACLF)experience severe immune dysfunction.Liver transplantation(LT)significantly improves survival outcomes.However,the characteristics of peripheral blood lymphocyte subsets(PBLSs)in this patient population are not well defined,and the dynamics of immune reconstitution post-LT are insufficiently understood.AIM To characterize PBLSs in patients with ACLF prior to LT and to evaluate PBLS reconstitution after LT.METHODS Clinical data from patients undergoing LT in the Transplantation Center,The Third Xiangya Hospital from January 2022 to December 2023 were analyzed retrospectively.Our cohort comprised 44 patients with ACLF,16 patients with acute decompensation of cirrhosis,and 23 patients with compensated cirrhosis.Twenty healthy volunteers were included as controls.PBLSs were evaluated across all groups.The relationship between PBLSs and post-LT prognosis was assessed,and dynamic changes in PBLSs among patients with ACLF were analyzed at different time points.RESULTS Patients with ACLF exhibited a marked reduction in PBLSs compared with healthy volunteers.Natural killer(NK)cell counts were further reduced in patients with ACLF when compared with patients with compensated cirrhosis.PBLSs did not correlate with the etiology or severity of ACLF or with established liver failure scores.Following LT,a rapid restoration of NK cells and B cells was observed in patients with ACLF.However,the cluster of differentiation(CD)3+T cell and CD4+T cell counts decreased 14 days post-LT and subsequently returned to preoperative levels by day 21.CONCLUSION Patients with ACLF exhibited markedly reduced PBLSs,with decreased NK cells potentially linked to progression from compensated cirrhosis to liver failure.NK and B cell were rapidly restored after LT. 展开更多
关键词 Peripheral blood lymphocyte subset Acute-on-chronic liver failure Liver transplantation Immune reconstitution Postoperative prognosis
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On Modal Logics of Subset Spaces
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作者 Shengyang Zhong 《逻辑学研究》 2025年第3期1-24,共24页
In modal logic,topological semantics is an intuitive and natural special case of neighbourhood semantics.This paper stems from the observation that the satisfaction relation of topological semantics applies to subset ... In modal logic,topological semantics is an intuitive and natural special case of neighbourhood semantics.This paper stems from the observation that the satisfaction relation of topological semantics applies to subset spaces which are more general than topological spaces.The minimal modal logic which is strongly sound and complete with respect to the class of subset spaces is found.Soundness and completeness results of some famous modal logics(e.g.S4,S5 and Tr)with respect to various important classes of subset spaces(eg intersection structures and complete fields of sets)are also proved.In the meantime,some known results,e.g.the soundness and completeness of Tr with respect to the class of discrete topological spaces,are proved directly using some modifications of the method of canonical mode1,without a detour via neighbourhood semantics or relational semantics. 展开更多
关键词 subset spaces modal logics topological semantics modal logics egs s satisfaction relation modal logictopological semantics neighbourhood semanticsthis
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Adjusting Accuracy of Digital Image Correlation Through Variable Subsets and Application in Airship Envelope
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作者 ZHU Fangtao VWANG Quanbao +1 位作者 XIE Weicheng DUAN Dengping 《Journal of Shanghai Jiaotong university(Science)》 2025年第2期239-251,共13页
The stratospheric airship is affected by harsh conditions in the stratosphere environment.To ensure the safety of the airship,it is necessary to detect the material state of the airship envelope.Since digital image co... The stratospheric airship is affected by harsh conditions in the stratosphere environment.To ensure the safety of the airship,it is necessary to detect the material state of the airship envelope.Since digital image correlation possesses non-contact strain measurement ability,this paper explores the infuence of different shapes of the subset on measurement accuracy.Through the results,it is found that increasing the aspect ratio of subsets can improve the strain accuracy measured in the c-direction,and reducing the aspect ratio can improve the strain accuracy measured in the y-direction.This trend becomes more obvious as the strain increases.Based on this discovery,a subset adaptive algorithm is proposed.The feasibility of the algorithm is verified by experiments,and the precision of strain measurement can be effectively improved by adjusting the threshold value.Therefore,the algorithm can be utilized to increase the measurement accuracy in the larger strain direction without changing the size of the subset. 展开更多
关键词 shape of subset digital image correlation strain of airship envelope self-adaptive selection
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Impact of oxaliplatin and trastuzumab combination therapy on tumor markers and T lymphocyte subsets for advanced gastric cancer 被引量:2
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作者 Cheng-Wan Zheng Yun-Mo Yang Hui Yang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第9期3905-3912,共8页
BACKGROUND Advanced gastric cancer(AGC)remains a challenging malignancy with poor prognosis.The combination of oxaliplatin and trastuzumab has shown promising results in AGC treatment.This study aimed to investigate t... BACKGROUND Advanced gastric cancer(AGC)remains a challenging malignancy with poor prognosis.The combination of oxaliplatin and trastuzumab has shown promising results in AGC treatment.This study aimed to investigate the effects of oxaliplatin and trastuzumab combination therapy on serum tumor markers and T lymphocyte subsets in patients with AGC and to explore their potential as predictive biomarkers for treatment response.AIM To investigate the impact of oxaliplatin and trastuzumab combination therapy on serum markers and T cell subsets in patients with AGC.METHODS This prospective study enrolled 60 patients with AGC.All patients received oxaliplatin(130 mg/m^(2),every 3 weeks)and trastuzumab(8 mg/kg loading dose,followed by 6 mg/kg every 3 weeks)for six cycles.Serum carcinoembryonic antigen(CEA),cancer antigen 19-9(CA19-9),and cancer antigen 72-4(CA72-4)were measured before and after treatment.T-lymphocyte subsets,including CD3+,CD4+,CD8+,and CD4+/CD8+ratios,were also evaluated.The clinical response was assessed using the Response Evaluation Criteria in Solid Tumors version 1.1.RESULTS After six cycles of treatment,the CEA,CA19-9,and CA72-4 serum levels significantly decreased compared to baseline levels(P<0.001).The percentages of CD3+and CD4+T lymphocytes increased significantly(P<0.05),whereas the percentage of CD8+T lymphocytes decreased(P<0.05).The CD4+/CD8+ratio also significantly increased after treatment(P<0.05).Patients with a higher decrease in serum tumor markers(≥50%reduction)and a higher increase in CD4+/CD8+ratio(≥1.5-fold)showed better clinical response rates(P<0.05).CONCLUSION Oxaliplatin and trastuzumab combination therapy effectively reduced serum tumor marker levels and modulated T lymphocyte subsets in patients with AGC.Combination therapy not only has a direct antitumor effect,but also enhances the immune response in patients with AGC.Serum tumor markers and T lymphocyte subsets may serve as potential predictive biomarkers for treatment response in patients with AGC receiving combination therapy. 展开更多
关键词 Advanced gastric cancer OXALIPLATIN TRASTUZUMAB Serum tumor markers T lymphocyte subsets Predictive biomarkers
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Machine learning-enhanced Monte Carlo and subset simulations for advanced risk assessment in transportation infrastructure
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作者 Furquan AHMAD Pijush SAMUI S.S.MISHRA 《Journal of Mountain Science》 SCIE CSCD 2024年第2期690-717,共28页
The maintenance of safety and dependability in rail and road embankments is of utmost importance in order to facilitate the smooth operation of transportation networks.This study introduces a comprehensive methodology... The maintenance of safety and dependability in rail and road embankments is of utmost importance in order to facilitate the smooth operation of transportation networks.This study introduces a comprehensive methodology for soil slope stability evaluation,employing Monte Carlo Simulation(MCS)and Subset Simulation(SS)with the"UPSS 3.0 Add-in"in MS-Excel.Focused on an 11.693-meter embankment with a soil slope(inclination ratio of 2H:1V),the investigation considers earthquake coefficients(kh)and pore water pressure ratios(ru)following Indian zoning requirements.The chance of slope failure showed a considerable increase as the Coefficient of Variation(COV),seismic coefficients(kh),and pore water pressure ratios(ru)experienced an escalation.The SS approach showed exceptional efficacy in calculating odds of failure that are notably low.Within computational modeling,the study optimized the worst-case scenario using ANFIS-GA,ANFIS-GWO,ANFIS-PSO,and ANFIS-BBO models.The ANFIS-PSO model exhibits exceptional accuracy(training R2=0.9011,RMSE=0.0549;testing R2=0.8968,RMSE=0.0615),emerging as the most promising.This study highlights the significance of conducting thorough risk assessments and offers practical insights into evaluating and improving the stability of soil slopes in transportation infrastructure.These findings contribute to the enhancement of safety and reliability in real-world situations. 展开更多
关键词 Monte Carlo Simulation subset Simulation Machine Learning Seismic coefficient
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Comparison of Block Design Nonparametric Subset Selection Rules Based on Alternative Scoring Rules
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作者 Gary C. McDonald Sajidah Alsaeed 《Applied Mathematics》 2024年第5期355-389,共35页
This article compares the size of selected subsets using nonparametric subset selection rules with two different scoring rules for the observations. The scoring rules are based on the expected values of order statisti... This article compares the size of selected subsets using nonparametric subset selection rules with two different scoring rules for the observations. The scoring rules are based on the expected values of order statistics of the uniform distribution (yielding rank values) and of the normal distribution (yielding normal score values). The comparison is made using state motor vehicle traffic fatality rates, published in a 2016 article, with fifty-one states (including DC as a state) and over a nineteen-year period (1994 through 2012). The earlier study considered four block design selection rules—two for choosing a subset to contain the “best” population (i.e., state with lowest mean fatality rate) and two for the “worst” population (i.e., highest mean rate) with a probability of correct selection chosen to be 0.90. Two selection rules based on normal scores resulted in selected subset sizes substantially smaller than corresponding rules based on ranks (7 vs. 16 and 3 vs. 12). For two other selection rules, the subsets chosen were very close in size (within one). A comparison is also made using state homicide rates, published in a 2022 article, with fifty states and covering eight years. The results are qualitatively the same as those obtained with the motor vehicle traffic fatality rates. 展开更多
关键词 Order Statistics Rank Scoring Methods Probability of a Correct Selection subset Size Motor Vehicle Traffic Fatality Rates Homicide Rates Asymptotic Distributions
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北斗双频精密单点定位模糊度固定及性能分析 被引量:4
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作者 赵琳 孙治国 +3 位作者 杨福鑫 张洁 谭波 李亮 《哈尔滨工程大学学报》 北大核心 2025年第2期283-291,共9页
为了全面评估北斗全球导航卫星系统精密单点定位模糊度固定的性能,本文基于北斗B1I/B3I双频无电离层组合精密单点定位模糊度固定(PPP-AR)模型,通过设计宽巷、窄巷部分模糊度子集选取的质量控制策略以保障模糊度固定的可靠性,对全球36个... 为了全面评估北斗全球导航卫星系统精密单点定位模糊度固定的性能,本文基于北斗B1I/B3I双频无电离层组合精密单点定位模糊度固定(PPP-AR)模型,通过设计宽巷、窄巷部分模糊度子集选取的质量控制策略以保障模糊度固定的可靠性,对全球36个测站60 d的静态数据进行性能评估。研究表明:在首次固定时间、固定解收敛时间和固定成功率方面,亚太BDS-2/3最好,亚太BDS-3次之,非亚太BDS-3最差。虽然BDS-2/3的平均固定成功率最高,但高度角优先固定方法未顾及固定成功率对PPP-AR核检的影响,使得部分观测时间的固定成功率有所下降。北斗固定解定位精度均为厘米级,以亚太BDS-2/3静态模式为例,北、东、天的均方根值分别为0.7、0.6和1.9 cm。 展开更多
关键词 北斗全球导航卫星系统 精密单点定位模糊度固定 双频无电离层组合 宽巷 窄巷 部分模糊度子集选取 质量控制 高度角优先固定方法
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Correlation Study Between T Lymphocyte Subsets and Rheumatoid Arthritis
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作者 Wei Gou 《Journal of Clinical and Nursing Research》 2024年第7期178-183,共6页
Objective:To study the effect of Helicobacter pylori infection on rheumatoid arthritis and T-lymphocyte subpopulations in patients with rheumatoid arthritis and to provide a new method for the treatment of rheumatoid ... Objective:To study the effect of Helicobacter pylori infection on rheumatoid arthritis and T-lymphocyte subpopulations in patients with rheumatoid arthritis and to provide a new method for the treatment of rheumatoid arthritis by removing Helicobacter pylori from patients.Methods:60 patients with rheumatoid arthritis admitted to the hospital from May 2022 to May 2023 were selected for the study,and all patients underwent a 13-carbon urea breath test to detect gastric H.pylori and the test results showed that 20 cases were negative and 40 cases were positive.The 40 positive patients were divided into the treatment group(n=20)and non-treatment group(n=20)by random number table method and the treatment group was given anti-Helicobacter pylori treatment,and the non-treatment group was given maintenance rheumatoid basic treatment,comparing the anti-cyclic citrulline peptide(CCP),DS28 score,peripheral blood T-lymphocyte subsets(CD4^(+)T-lymphocytes,CD8^(+)T-lymphocytes,CD4^(+)/CD8^(+)ratio)before and after the treatment of patients by 13-carbon urea respiration test(pylori-negative group,20 patients)and those who were positive for the treatment of H pylori(pylori-positive group,40 patients).Besides,the correlation of peripheral blood T-lymphocyte subsets and disease activity between treatment and non-treatment groups in the pylori-positive group was identified together with the correlation of DS28 scores,TNF-αlevels,sedimentation and immunoglobulin,lymphocyte subsets in the pylori-positive treatment group and positive non-treatment group as well as the level of globulin,lymphocyte subsets,and peripheral blood lymphocytes before and after treatment.Results:Before treatment,CCP,DS28 score,CD8^(+)T lymphocyte level of the pylori-negative group were lower than that of the positive group,and CD4^(+)T lymphocyte and CD4^(+)/CD8^(+)ratio were higher than that of the positive group(P<0.05);after treatment,the indexes of the pylori-positive group improved,and there was no significant difference in the comparison of the indexes with those of the pylori-negative group(P>0.05);the positive treatment group had a DS28(3.19±1.02)points,positive non-treatment group DS28(5.36±1.85)points,non-treatment group DS28 score and CD4^(+)T lymphocytes,CD4^(+)/CD8^(+)negative correlation with CD8^(+)T lymphocytes showed a positive correlation(P<0.05);before the treatment,pylori-positive treatment group and non-treatment group DS28 scores,TNF-αlevels,peripheral blood T lymphocyte subpopulation levels were not significantly different(P>0.05);after treatment,DS28 score,TNF-αlevel,CD8^(+)T of the treatment group were lower than those of the non-treatment group,and CD4^(+)T lymphocytes and CD4^(+)/CD8^(+)ratio were higher than those of the non-treatment group(P<0.05).Conclusion:H.pylori affects the level of T lymphocyte subsets in patients with rheumatoid arthritis,and there is a certain correlation between the two.Removal of H.pylori can improve the level of T lymphocyte subsets,which is important for the treatment of patients with rheumatoid arthritis. 展开更多
关键词 Peripheral blood T lymphocyte subsets Rheumatoid arthritis Helicobacter pylori Intestinal flora dysbiosis
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多发性骨髓瘤患者骨髓T细胞亚群及PD-1表达的临床意义 被引量:1
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作者 陈红 任家材 +3 位作者 赵媛 张之钰 谢燕 金木兰 《中国组织化学与细胞化学杂志》 2025年第2期125-133,共9页
目的探讨多发性骨髓瘤患者骨髓T细胞亚群及各亚群PD-1表达的临床意义。方法收集2023年9月-2024年9月首都医科大学附属北京朝阳医院石景山院区20例初诊多发性骨髓瘤(newly diagnosed multiple myeloma,NDMM)患者、20例诊断为贫血的非肿... 目的探讨多发性骨髓瘤患者骨髓T细胞亚群及各亚群PD-1表达的临床意义。方法收集2023年9月-2024年9月首都医科大学附属北京朝阳医院石景山院区20例初诊多发性骨髓瘤(newly diagnosed multiple myeloma,NDMM)患者、20例诊断为贫血的非肿瘤患者(对照组)的骨髓标本,利用流式细胞术检测骨髓T细胞亚群及各亚群PD-1的表达水平;同时对NDMM组骨髓行免疫分型,并分析免疫细胞PD-1的表达与各临床指标及骨髓瘤细胞抗原表达之间的相关性。结果NDMM组CD8^(+)T细胞比例明显高于对照组,CD3^(+)T细胞、CD4^(+)T细胞PD-1的表达量明显升高;DS-Ⅲ期患者骨髓中CD8^(+)T细胞比例显著高于Ⅰ/Ⅱ期,ISS-Ⅲ期患者CD4^(+)T细胞PD-1表达量显著高于Ⅰ/Ⅱ期患者;CD3^(+)T细胞比例与骨髓瘤CD19表达量呈正相关,CD4^(+)T细胞与骨髓瘤细胞CD200表达量呈负相关性;PD-1^(+)CD3^(+)T细胞与CD27表达量呈负相关,PD-1^(+)CD4^(+)T细胞与Hb呈负相关。结论MM骨髓微环境处于免疫失调状态,免疫细胞PD-1的表达与不良临床反应及骨髓瘤细胞不良免疫表型相关,从而影响患者的结局及转归。 展开更多
关键词 多发性骨髓瘤 T细胞亚群 PD-1 流式细胞术
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系统性红斑狼疮患者淋巴细胞亚群变化与疾病活动的相关性及预测系统损害价值 被引量:1
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作者 俞烜华 张伟桢 +4 位作者 刘昌泉 吕雪冰 吴月萍 陈蓉艳 黄惠娟 《中华全科医学》 2025年第9期1555-1560,共6页
目的 探讨系统性红斑狼疮(SLE)患者淋巴细胞亚群变化与疾病活动的相关性及预测不同系统损害的价值,为评估SLE疾病活动及系统损害提供实验室指标。方法 入组2023年3月—2024年6月福建中医药大学附属人民医院收治的SLE患者85例及健康对照8... 目的 探讨系统性红斑狼疮(SLE)患者淋巴细胞亚群变化与疾病活动的相关性及预测不同系统损害的价值,为评估SLE疾病活动及系统损害提供实验室指标。方法 入组2023年3月—2024年6月福建中医药大学附属人民医院收治的SLE患者85例及健康对照80例,SLE以疾病是否活动及不同系统损害等分组,检测各组T淋巴细胞亚群、B淋巴细胞、NK细胞计数,采用相关性分析、logistic回归分析研究各指标与SLE疾病活动指标的相关性及预测不同系统损害的价值。结果 SLE患者及疾病活动组CD3^(+)、CD4^(+)、CD8^(+)T淋巴细胞、B淋巴细胞、NK细胞绝对计数较健康对照组及疾病无活动组均降低;SLE肾脏病变、血液系统受累、关节炎、浆膜炎组CD3^(+)、CD4^(+)、CD8^(+)T淋巴细胞绝对计数较无相应系统损害组均降低;肾脏病变组NK细胞绝对计数降低;合并感染组CD3^(+)、CD8^(+)T淋巴细胞绝对计数均降低(P<0.05)。红细胞沉降率(ESR)、抗dsDNA抗体、CD3^(+)、CD4^(+)、CD8^(+)T淋巴细胞绝对计数、NK细胞、B淋巴细胞绝对计数联合检测预测SLE疾病活动的AUC为0.882。补体(C)3、CD3^(+)、CD4^(+)、CD8^(+)T淋巴细胞绝对计数、NK细胞绝对计数预测SLE肾脏病变的AUC为0.833。结论 SLE及疾病活动、不同系统损害、合并感染等组患者淋巴细胞亚群均异常,联合检测淋巴细胞亚群、SLE疾病活动指标可评估SLE疾病活动及预测不同系统损害等。 展开更多
关键词 系统性红斑狼疮 淋巴细胞亚群 疾病活动 系统损害
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玉屏风颗粒联合乙酰半胱氨酸对支原体肺炎患儿疗效及T淋巴细胞的影响 被引量:1
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作者 冯慧玲 王凯悦 +1 位作者 宋建刚 薛峥峰 《中国药物应用与监测》 2025年第2期352-355,共4页
目的探讨玉屏风颗粒联合乙酰半胱氨酸对支原体肺炎患儿的疗效及T淋巴细胞亚群的影响。方法选取2021年1月至2023年1月于延安大学附属医院就诊102例支原体肺炎患儿进行回顾性分析,根据治疗方法将患者分为对照组(乙酰半胱氨酸治疗)51例和... 目的探讨玉屏风颗粒联合乙酰半胱氨酸对支原体肺炎患儿的疗效及T淋巴细胞亚群的影响。方法选取2021年1月至2023年1月于延安大学附属医院就诊102例支原体肺炎患儿进行回顾性分析,根据治疗方法将患者分为对照组(乙酰半胱氨酸治疗)51例和试验组(乙酰半胱氨酸联合玉屏风颗粒治疗)51例。比较两组患儿临床疗效、症状消退时间、T淋巴细胞亚群变化及不良反应。结果试验组治疗后总有效率为96.08%(49/51)高于对照组的82.35%(42/51)(χ^(2)=4.993,P=0.025)。试验组患儿咳嗽、发热、喘息、啰音消退时间[分别为(5.35±0.89)d、(3.23±0.65)d、(2.67±0.58)d、(5.74±0.78)d]均短于对照组[分别为(6.12±1.32)d、(4.01±0.96)d、(3.54±0.84)d、、(6.45±1.12)d](t=3.454、4.805、6.087、3.715,均P<0.001)。试验组和对照组T淋巴细胞亚群CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)水平[分别为(65.87±7.23)%、(36.87±7.23)%、(1.47±0.42)、(61.23±6.18)%、(31.23±6.12)%、(1.26±0.25)]均高于治疗前[分别为(54.46±5.59)%、(26.45±5.59)%、(0.95±0.24)、(54.14±5.37)%、(26.14±5.37)%、(0.93±0.21)],且试验组高于对照组(t=3.484、4.252、3.068,均P<0.05)。两组不良反应总发生率分别为9.80%(5/51)、5.88%(3/51),差异无统计学意义(χ^(2)=0.136,P=0.713)。结论玉屏风颗粒联合乙酰半胱氨酸治疗支原体肺炎患儿疗效良好,能够更快缓解症状,改善T淋巴细胞亚群分布,且安全性良好。 展开更多
关键词 玉屏风颗粒 乙酰半胱氨酸 肺炎支原体肺炎 T淋巴细胞亚群 临床疗效
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基于SBAS InSAR技术的叙古高速沿线滑坡识别与监测 被引量:1
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作者 杨辰 金源 +1 位作者 邓飞 史绪国 《自然资源遥感》 北大核心 2025年第1期161-168,共8页
叙永—古蔺高速公路(叙古高速)位于四川盆地南缘,线路周边地质条件复杂,其安全运营受到地质灾害威胁,因此,叙古高速沿线地质灾害的识别分析具有十分重要的意义。合成孔径雷达干涉测量(interferometric synthe-tic aperture Radar,InSAR... 叙永—古蔺高速公路(叙古高速)位于四川盆地南缘,线路周边地质条件复杂,其安全运营受到地质灾害威胁,因此,叙古高速沿线地质灾害的识别分析具有十分重要的意义。合成孔径雷达干涉测量(interferometric synthe-tic aperture Radar,InSAR)技术具有全天时全天候、覆盖范围大和毫米级地表形变监测的优势,在广域滑坡识别监测中发挥了重要作用。基于此,采用小基线集(small baseline subset,SBAS)InSAR技术对2017年2月—2020年9月Sentinel-1升降轨数据集进行处理分析,获取叙古高速沿线地表形变速率,共探测到包括集美滑坡等在内的18处滑坡体,分析发现滑坡形变主要与人为活动相关。结果同时表明,升降轨数据结合有助于更准确地识别灾害点分布。随着数据的积累与技术的不断发展,InSAR技术可以在地质灾害防治中发挥越来越重要的作用。 展开更多
关键词 滑坡探测 合成孔径雷达干涉测量 叙古高速 小基线数据集
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系统性红斑狼疮患者淋巴细胞亚群和TLR9及TLR2预测继发真菌感染的临床价值 被引量:1
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作者 杨建敏 王怡佳 +2 位作者 杨惠芳 王涵 周杨 《中华医院感染学杂志》 北大核心 2025年第4期523-527,共5页
目的 探讨系统性红斑狼疮(SLE)患者外周血淋巴细胞亚群和Toll样受体(TLR)9、TLR2表达水平,并分析各指标对继发真菌感染的预测价值。方法 选取南阳市第一人民医院2020年1月-2023年12月收治的80例SLE患者为研究对象。根据患者是否继发真... 目的 探讨系统性红斑狼疮(SLE)患者外周血淋巴细胞亚群和Toll样受体(TLR)9、TLR2表达水平,并分析各指标对继发真菌感染的预测价值。方法 选取南阳市第一人民医院2020年1月-2023年12月收治的80例SLE患者为研究对象。根据患者是否继发真菌感染分为感染组(n=24)与未感染组(n=56),分析两组患者一般资料、外周血淋巴细胞亚群和TLR9、TLR2表达水平,并采用受试者工作特征(ROC)曲线分析外周血淋巴细胞亚群和TLR9、TLR2水平对SLE患者继发真菌感染的预测价值。结果 感染组抗菌药物使用时间(2.15±0.42)周长于未感染组(P<0.001)。感染组TLR9为(11.60±1.28)高于未感染组(P<0.001),感染组CD_(4)^(+)T细胞、CD_(8)^(+)T细胞、总T细胞、总B细胞、TLR2分别为(344.74±69.26)、(338.27±73.21)、(625.42±168.87)、(92.46±17.83)/μl、(42.08±14.09)低于未感染组(P<0.001)。ROC曲线分析显示,外周血CD_(4)^(+)T细胞、CD_(8)^(+)T细胞、总T细胞、总B细胞、TLR9、TLR2对SLE患者继发真菌感染均有预测效能(P<0.05),其曲线下面积(AUC)分别为0.934、0.923、0.909、0.819、0.757、0.784,其中CD_(4)^(+)T细胞≤386.10/μl时预测效能最高,敏感性为83.33%,特异性为91.07%。结论 淋巴细胞亚群与TLR9、TLR2水平可早期预测SLE患者继发真菌感染发生,其中CD_(4)^(+)T细胞水平预测效能最高。 展开更多
关键词 系统性红斑狼疮 继发真菌感染 淋巴细胞亚群 TOLL样受体9 TOLL样受体2 预测价值
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甲型流感病毒合并肺炎支原体感染患儿淋巴细胞亚群和炎性细胞因子变化与肺炎严重程度的相关性 被引量:1
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作者 付书琴 贾婉玉 +2 位作者 宋春兰 李鹏 成怡冰 《中华实用诊断与治疗杂志》 2025年第3期238-243,共6页
目的 观察甲型流感病毒(IAV)合并肺炎支原体(MP)感染患儿外周血淋巴细胞亚群、炎性细胞因子水平变化,探讨其与肺炎严重程度的相关性。方法 2023年3月—2024年5月河南省儿童医院诊治IAV合并MP感染患儿240例,未发生肺炎者120例为无肺炎组... 目的 观察甲型流感病毒(IAV)合并肺炎支原体(MP)感染患儿外周血淋巴细胞亚群、炎性细胞因子水平变化,探讨其与肺炎严重程度的相关性。方法 2023年3月—2024年5月河南省儿童医院诊治IAV合并MP感染患儿240例,未发生肺炎者120例为无肺炎组,发生肺炎者120例参照临床肺部感染评分分为重症感染组33例和轻度感染组87例。比较3组入院次日外周血CD3^(+)T淋巴细胞百分比、CD4^(+)/CD8^(+)比值、CD19^(+)B淋巴细胞百分比、自然杀伤(NK)细胞百分比及血清白细胞介素(IL)-4、IL-5、IL-6、IL-8、IL-10、IL-17a、肿瘤坏死因子-α(TNF-α)、干扰素(IFN)-α、IFN-γ水平;采用Spearman相关法分析CD3^(+)T淋巴细胞百分比、CD4^(+)/CD8^(+)比值及IL-6、IL-10、IL-4、IFN-γ与肺炎严重程度的相关性。结果 (1)3组CD3^(+)T淋巴细胞百分比、CD4^(+)/CD8^(+)比值及CD19^(+)B淋巴细胞百分比比较差异均有统计学意义(H=6.574~71.531,P均<0.05),NK细胞百分比比较差异无统计学意义(H=1.749,P=0.417)。重症感染组CD3^(+)T淋巴细胞百分比[50.62%(47.17%,55.31%)]、CD4^(+)/CD8^(+)比值[0.83(0.63,1.75)]均低于轻度感染组[54.17%(50.65%,61.44%)、1.36(0.82,1.69)]和无肺炎组[67.17%(62.35%,73.35%)、1.38(1.09,1.73)](P<0.05),轻度感染组均低于无肺炎组(P<0.05);无肺炎组CD19^(+)B淋巴细胞百分比[(23.24±6.49)%]低于轻度感染组[(25.32±7.65)%]和重症感染组[(28.77±7.54)%](P<0.05),轻度感染组与重症感染组比较差异无统计学意义(P>0.05)。(2)3组血清IL-4、IL-6、IL-10、IFN-γ水平比较差异均有统计学意义(H=6.574~69.080,P均<0.05),IL-5、IL-8、TNF-α、IFN-α、IL-17a水平比较差异均无统计学意义(H=2.626~6.832,P均>0.05)。重症感染组血清IL-4[3.46(2.37,4.31)ng/L]、IL-6[37.4(30.89,64.23)ng/L]、IL-10[32.44(19.69,52.86)ng/L]、IFN-γ[2.72(1.18,4.04)ng/L]水平均高于轻度感染组[2.65(1.57,4.15)、19.57(5.19,37.78)、24.07(8.99,40.62)、2.50(1.53,4.22)ng/L]和无肺炎组[2.18(1.10,3.26)、7.24(4.50,10.00)、9.72(5.75,15.63)、1.96(1.11,3.03)ng/L](P<0.05),轻度感染组均高于无肺炎组(P<0.05)。(3)CD3^(+)T淋巴细胞百分比(r=-0.554,P<0.001)、CD4^(+)/CD8^(+)比值(r=-0.632,P=0.001)与肺炎严重程度呈负相关,IL-6(r=0.532,P<0.001)、IL-10(r=0.525,P<0.001)、IL-4(r=0.569,P=0.001)、IFN-γ(r=0.564,P=0.015)与肺炎严重程度呈正相关。结论 CD3^(+)T淋巴细胞百分比及CD4^(+)/CD8^(+)比值降低,IL-6、IL-10、IL-4、IFN-γ升高的IAV合并MP感染患儿易发生肺炎,且上述指标表达与肺炎严重程度相关。 展开更多
关键词 甲型流感病毒 肺炎支原体 儿童 T淋巴细胞亚群 炎性细胞因子 自然杀伤细胞
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原发性胆汁性胆管炎患者外周血T细胞亚群及其功能改变的临床价值探讨
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作者 郑立明 刘津含 +3 位作者 李洪 柳龙根 郑国军 戴思佳 《细胞与分子免疫学杂志》 北大核心 2025年第5期437-443,共7页
目的分析原发性胆汁性胆管炎(PBC)患者外周血淋巴细胞亚群及细胞因子白细胞介素1β(IL-1β)、IL-2、IL-4、IL-5、IL-6、IL-8、IL-10、IL-12P70、IL-17A、肿瘤坏死因子α(TNF-α)、γ干扰素(IFN-γ)及IFN-α水平,以期为PBC致病机制的研... 目的分析原发性胆汁性胆管炎(PBC)患者外周血淋巴细胞亚群及细胞因子白细胞介素1β(IL-1β)、IL-2、IL-4、IL-5、IL-6、IL-8、IL-10、IL-12P70、IL-17A、肿瘤坏死因子α(TNF-α)、γ干扰素(IFN-γ)及IFN-α水平,以期为PBC致病机制的研究提供思路。方法回顾性分析2023-01-01/2024-06-30期间常州市第三人民医院初次诊断为PBC的住院患者和同期健康体检者的临床资料及实验室检查数据。结果共收集到符合纳、排标准的152例PBC住院患者和96例同期健康体检者的病历资料。两组患者的基线资料及检验数据间存在显著性差异。经倾向性得分匹配平衡后,每组最终各纳入61例患者,确保了患者的年龄和性别在两组间均衡可比。结果分析显示,PBC患者外周血总淋巴细胞的百分比显著升高(31.9%vs 17.8%),以CD4^(+)T细胞升高为主(46.77%vs 41.19%),而CD8^(+)T细胞显著降低(19.73%vs 22.07%)。CD4^(+)程序性死亡蛋白1(PD-1)+T细胞和CD8^(+)PD-1^(+)T细胞明显升高,且CD8^(+)PD-1^(+)T细胞与PBC患者的肝脏炎症程度呈正相关(r=0.41)。CD4^(+)T细胞线粒体质量(MM)显著升高,而CD8^(+)T细胞MM及T细胞线粒体膜电位(MMP)未见异常改变。此外,PBC患者血浆中IL-4、IL-8、IL-10及IFN-α水平存在异常升高,IL-5和IL-1β与PBC患者的肝脏纤维化程度呈负相关(r=-0.52)。结论PBC患者CD4^(+)T细胞过度活化和增殖,CD8^(+)T细胞受到抑制,PD-1的高表达导致T细胞耗竭,揭示了PBC患者的免疫状态发生显著改变,这种改变与疾病的进展相关。此外,细胞因子可能参与PBC的免疫调节过程,对疾病的致病机制产生影响。通过对淋巴细胞亚群及细胞因子水平的监测,有助于评估PBC患者的免疫状态和疾病活动性,从而指导个体化的治疗策略。 展开更多
关键词 原发性胆汁性胆管炎(PBC) 淋巴细胞亚群 细胞因子
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支持子集匹配且可验证的云辅助多方PSI协议
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作者 赖成喆 张晗玥 +1 位作者 秦宝东 郑东 《密码学报(中英文)》 北大核心 2025年第3期627-644,共18页
隐私集合交集(private set intersection,PSI)协议一直是解决用户隐私保护需求和合作共享需求间矛盾的有效工具.面对计算资源受限场景下的多方求交计算,本文提出了支持子集匹配且可验证的云辅助多方PSI协议(tag-based and verifiable cl... 隐私集合交集(private set intersection,PSI)协议一直是解决用户隐私保护需求和合作共享需求间矛盾的有效工具.面对计算资源受限场景下的多方求交计算,本文提出了支持子集匹配且可验证的云辅助多方PSI协议(tag-based and verifiable cloud-assisted multi-party PSI,TVC-MPSI).首先,TVC-MPSI应用星型网络拓扑结构,增加对单个云服务器的安全要求,仅利用密文交集基数和交集的多项式形式确保了交集的可验证性;其次,当客户端的集合包含多个子集时,引入了Pedersen门限可验证的秘密共享技术来实现对集合子集的匹配,从而实现细粒度的交集运算;除此之外,引入基于RSA的局部可验证签名算法(local verifiable aggregate signatures,LVS),保证云服务器端和客户端身份的不可伪造性;最后,通过正确性和安全性分析,以及全面的性能对比,表明协议在保证安全性的同时拥有较好的性能. 展开更多
关键词 隐私集合交集协议 云辅助 多方 子集 隐私
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外周血T淋巴细胞亚群表达水平对多发性骨髓瘤患儿预后的预测价值 被引量:1
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作者 张小丽 李样 高慧娟 《实用癌症杂志》 2025年第2期337-340,344,共5页
目的探究外周血T淋巴细胞亚群表达水平对多发性骨髓瘤(MM)患儿预后的预测价值。方法收集90例MM患儿临床资料进行回顾性分析。根据患儿预后情况将其分为良好组(n=68例)和不良组(n=22例)。比较两组患儿的一般资料、CD3^(+)、CD4^(+)、CD8^... 目的探究外周血T淋巴细胞亚群表达水平对多发性骨髓瘤(MM)患儿预后的预测价值。方法收集90例MM患儿临床资料进行回顾性分析。根据患儿预后情况将其分为良好组(n=68例)和不良组(n=22例)。比较两组患儿的一般资料、CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)、NK细胞的表达情况,并分析外周血T淋巴细胞亚群相关指标表达水平对MM患儿预后的评估价值。结果两组患儿年龄、性别、M蛋白、血肌酐比较差异不显著(P>0.05)。不良组CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)、NK细胞均显著低于良好组(t=3.276,P=0.002、t=6.635,P=0.000、t=2.242,P=0.028、t=6.271,P=0.000),CD8^(+)高于良好组,差异有统计学意义(t=3.603,P=0.001)。外周血T淋巴细胞亚群相关指标CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)、NK细胞的表达水平在MM患儿预后的评估中有良好的应用价值,AUC分别为0.701、0.880、0.711、0.621、0.860、0.959,上述指标联合应用对MM患儿预后的预测效能最高,AUC最大,为0.959,灵敏度为0.935,特异度为0.921。CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)、NK细胞的预测阈值分别为57.252%、34.255%、42.241%、0.847、22.144%。结论外周血T淋巴细胞亚群表达水平对MM患儿预后有良好的预测价值,可将外周血T淋巴细胞亚群检测作为临床上MM患儿预后的评估方法。 展开更多
关键词 T淋巴细胞亚群 多发性骨髓瘤 预后 预测
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基于两次量子搜索的K子集和问题求解
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作者 叶天语 吴恒 甘志刚 《通信学报》 北大核心 2025年第7期182-190,共9页
针对K子集和问题,提出了一种基于两次量子搜索的高效量子算法。第一次量子搜索通过变异Grover算子生成包含所有元素个数为K的子集的量子叠加态;具体地,首先通过Oracle算子进行相位翻转标记所有含K个元素的子集,然后通过扩散算子放大标... 针对K子集和问题,提出了一种基于两次量子搜索的高效量子算法。第一次量子搜索通过变异Grover算子生成包含所有元素个数为K的子集的量子叠加态;具体地,首先通过Oracle算子进行相位翻转标记所有含K个元素的子集,然后通过扩散算子放大标记的目标子集的概率幅值。第二次量子搜索则通过另一个变异Grover算子从所有元素个数为K的子集中找到K个元素和等于目标值的子集;具体地,首先通过特定的和校验Oracle算子标记所有的元素和等于目标值且只含K个元素的子集,然后通过扩散算子放大标记子集的概率幅值。仿真实验结果表明,所提方法准确率大于或等于89%,较现有方法准确率更高。 展开更多
关键词 K子集和问题 GROVER量子搜索算法 布尔可满足性问题 量子线路
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职业性噪声对劳动者免疫功能的影响
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作者 李聪 吴奇峰 +3 位作者 蔡品 李霞 肖明慧 梁伟辉 《职业卫生与应急救援》 2025年第4期487-490,共4页
目的探讨职业性噪声对劳动者免疫功能的影响。方法采用整群抽样法,以广东省2019年3月—2020年3月在岗职业健康检查时被界定为疑似职业性噪声聋的65名劳动者为研究对象,以是否存在耳鸣症状分为耳鸣组(n=35)和无耳鸣组(n=30);以45名无职... 目的探讨职业性噪声对劳动者免疫功能的影响。方法采用整群抽样法,以广东省2019年3月—2020年3月在岗职业健康检查时被界定为疑似职业性噪声聋的65名劳动者为研究对象,以是否存在耳鸣症状分为耳鸣组(n=35)和无耳鸣组(n=30);以45名无职业性噪声接触的健康人员为对照组。检测3组人群晨起空腹静卧状态下静脉血T淋巴细胞亚群、免疫球蛋白IgG、IgM、IgA及补体C3、C4水平,并比较上述指标的组间差异。结果与对照组比较,无耳鸣组及耳鸣组的CD3^(+)T细胞、CD3^(+)CD4^(+)T细胞、CD3^(+)CD8^(+)T细胞水平及CD3^(+)CD4^(+)T/CD3^(+)CD8^(+)T细胞比值差异均无统计学意义(P>0.05);耳鸣组的免疫球蛋白IgM水平低于对照组(P<0.05),无耳鸣组及耳鸣组的补体C3水平均高于对照组(P<0.05);其余指标在3组间比较,差异均无统计学意义(P>0.05)。结论职业性噪声可能对劳动者的体液免疫与固有免疫系统产生影响,对细胞免疫系统无影响。 展开更多
关键词 职业性噪声 T淋巴细胞亚群 免疫球蛋白 细胞免疫 体液免疫
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