Two kinds of average approximation accuracy

Rough set theory places great importance on approximation accuracy,which is used to gauge how well a rough set model describes a target concept.However,traditional approximation accuracy has limitations since it varies with changes in the target concept and cannot evaluate the overall descriptive ability of a rough set model.To overcome this,two types of average approximation accuracy that objectively assess a rough set model’s ability to approximate all information granules is proposed.The first is the relative average approximation accuracy,which is based on all sets in the universe and has several basic properties.The second is the absolute average approximation accuracy,which is based on undefinable sets and has yielded significant conclusions.We also explore the relationship between these two types of average approximation accuracy.Finally,the average approximation accuracy has practical applications in addressing missing attribute values in incomplete information tables.

Multi-modal knowledge graph inference via media convergence and logic rule

Media convergence works by processing information from different modalities and applying them to different domains.It is difficult for the conventional knowledge graph to utilise multi-media features because the introduction of a large amount of information from other modalities reduces the effectiveness of representation learning and makes knowledge graph inference less effective.To address the issue,an inference method based on Media Convergence and Rule-guided Joint Inference model(MCRJI)has been pro-posed.The authors not only converge multi-media features of entities but also introduce logic rules to improve the accuracy and interpretability of link prediction.First,a multi-headed self-attention approach is used to obtain the attention of different media features of entities during semantic synthesis.Second,logic rules of different lengths are mined from knowledge graph to learn new entity representations.Finally,knowledge graph inference is performed based on representing entities that converge multi-media features.Numerous experimental results show that MCRJI outperforms other advanced baselines in using multi-media features and knowledge graph inference,demonstrating that MCRJI provides an excellent approach for knowledge graph inference with converged multi-media features.

Effects of High-Intensity Intermittent Training on Metabolic Parameters and Irisin Levels in High-Fat-Fed Rats

Objective:To investigate the effects of high-intensity intermittent training(HIIT)on preventing significant weight gain and provide scientific theoretical support and practical guidance for reducing the occurrence of obesity.Methods:Twenty-four Sprague-Dawley rats were randomly divided into four groups:the control sedentary group(CS),the high-fat sedentary group(HS),the high-fat continuous exercise group(HE),and the high-fat intermittent exercise group(HI).The HE and HI groups underwent five days of continuous low-intensity exercise and eight weeks of high-intensity intermittent exercise.Weekly monitoring included measurements of food intake and body weight.An automatic biochemical analyzer was used to assess blood lipid and glucose levels,while ELISA kits measured serum insulin and irisin content.H&E staining was used to observe adipocyte size.Results:In the HS group,body weight,blood lipid levels,blood glucose levels,and adipocyte size significantly increased,while the QUICKI index decreased.In the HI group,body weight,blood lipid levels,blood glucose levels,and adipocyte size decreased,and the QUICKI index increased.The effects of high-intensity intermittent exercise were superior to those of continuous low-intensity exercise.In the HI group,serum irisin levels did not change significantly after exercise,while in the HE group,there was a slight upward trend in irisin levels.Conclusion:A high-fat diet induced abnormal metabolism in rats.HIIT effectively prevents metabolic abnormalities induced by a high-fat diet,and its effects are more pronounced than those of low-intensity exercise.HIIT stimulates the secretion of blood irisin,affecting secretion levels,and may represent a novel mechanism for maintaining metabolic homeostasis.This has important implications for controlling significant weight gain.

Overexpression of Dlx2 enhances osteogenic differentiation of BMSCs and MC3T3-E1 cells via direct upregulation of Osteocalcin and Alp

Genetic studies have revealed a critical role of Distal-homeobox (Dlx) genes in bone formation,and our previous study showed that Dlx2 overexpressing in neural crest cells leads to profound abnormalities of the craniofacial tissues.The aim of this study was to investigate the role and the underlying molecular mechanisms of Dlx2 in osteogenic differentiation of mouse bone marrow stromal cells (BMSCs) and pre-osteoblast MC3T3-E1 cells.Initially,we observed upregulation of Dlx2 during the early osteogenesis in BMSCs and MC3T3-E1 cells.Moreover,Dlx2 overexpression enhanced alkaline phosphatase (ALP) activity and extracellular matrix mineralization in BMSCs and MC3T3-E1 cell line.In addition,micro-CT of implanted tissues in nude mice confirmed that Dlx2 overexpression in BMSCs promoted bone formation in vivo.Unexpectedly,Dlx2 overexpression had little impact on the expression level of the pivotal osteogenic transcription factors Runx2,Dlx5,Msx2,and Osterix,but led to upregulation of Alp and Osteocalcin (OCN),both of which play critical roles in promoting osteoblast maturation.Importantly,luciferase analysis showed that Dlx2 overexpression stimulated both OCN and Alp promoter activity.Through chromatin-immunoprecipitation assay and site-directed mutagenesis analysis,we provide molecular evidence that Dlx2 transactivates OCN and Alp expression by directly binding to the Dlx2-response cis-acting elements in the promoter of the two genes.Based on these findings,we demonstrate that Dlx2 overexpression enhances osteogenic differentiation in vitro and accelerates bone formation in vivo via direct upregulation of the OCN and Alp gene,suggesting that Dlx2 plays a crucial role in osteogenic differentiation and bone formation.

Rho-associated protein kinase modulates neurite extension by regulating microtubule remodeling and vinculin distribution

Rho-associated protein kinase is an essential regulator of cytoskeletal dynamics during the process of neurite extension. However, whether Rho kinase regulates microtubule remodeling or the distri- bution of adhesive proteins to mediate neurite outgrowth remains unclear. By specifically modulat- ing Rho kinase activity with pharmacological agents, we studied the morpho-dynamics of neurite outgrowth. We found that lysophosphatidic acid, an activator of Rho kinase, inhibited neurite out- growth, which could be reversed by Y-27632, an inhibitor of Rho kinase. Meanwhile, reorganization of microtubules was noticed during these processes, as indicated by their significant changes in the soma and growth cone. In addition, exposure to lysophosphatidic acid led to a decreased mem- brane distribution of vinculin, a focal adhesion protein in neurons, whereas Y-27632 recruited vin- culin to the membrane. Taken together, our data suggest that Rho kinase regulates rat hippocampal neurite growth and microtubule formation via a mechanism associated with the redistribution of vinculin.

Simulation and experimental study of a novel bifacial structure of silicon heterojunction solar cell for high efficiency and low cost

A novel structure of Ag gridlSiN_(x)/n+-c-Si/n-c-Si/i-a-Si:H/p^(+)-a-Si:HlTCO/Ag grid was designed to increase the ef-ficiency of bifacial amorphous/crystalline silicon-based solar cells and reduce the rear material consumption and production cost.The simulation results show that the new structure obtains higher efficiency compared with the typical bifa-cial amorphous/crystalline silicon-based solar cell because of an increase in the short-circuit current(J_(sc)),while retaining the advantages of a high open-circuit voltage,low temperature coefficient,and good weak-light performance.Moreover,real cells composed of the novel structure with dimensions of 75 mm×75 mm were fabricated by a special fabrication recipe based on industrial processes.Without parameter optimization,the cell efficiency reached 21.1%with the J_(sc)of 41.7 mA/cm^(2).In addition,the novel structure attained 28.55%potential conversion efficiency under an illumination of AM 1.5 G,100 mW/cm^(2).We conclude that the configuration of the Ag grid/SiN_(x)/n^(+)-c-Si/n-c-Si/i-a-Si:H/p^(+)-a-Si:H/TCO/Ag grid is a promising structure for high efficiency and low cost.

Comprehensive classifications for the endovascular recanalization of vertebral artery stump syndrome

Background:and purpose:To share our single-center vertebral artery stump syndrome(VASS)treatment experience and assess the role of comprehensive classification based on anatomic development,proximal conditions,and distal conditions(PAD).Materials and methods:Data were retrospectively collected from patients who underwent endovascular thrombectomy(EVT)at the Stroke Center of the First Hospital of Jilin University between January 2016 and December2021.Among patients with acute ischemic stroke in the posterior circulation,those with acute occlusion of the intracranial arteries and occlusion at the origin of the vertebral artery confirmed by digital subtraction angiography were selected.The clinical data were summarized and analyzed.Results:Fifteen patients with VASS were enrolled in the study.The overall success rate of surgical recanalization was 80%.The successful proximal recanalization rate was 70.6%,and the recanalization rates for P1,P2,P3,and P4 were 100%,71.4%,50%,and 66.67%,respectively.The mean operation times for the A1 and A2 types were124 and 120 min,respectively.The successful distal recanalization rate was 91.7%,and the recanalization rates for types D1,D2,D3,and D4 were 100%,83.3%,100%,and 100%,respectively.Five patients experienced perioperative complications(incidence rate:33.3%).Distal embolism occurred in three patients(incidence rate:20%).No dissection or subarachnoid hemorrhage occurred in any patient.Conclusion:EVT is a technically feasible treatment for VASS,and comprehensive PAD classification can,to a certain extent,help initially estimate the difficulty of surgery and provide guidance for interventional procedures.

聚苯砜对苯二甲酰胺/苝系荧光材料复合静电纺膜的制备与表征

聚苯砜对苯二甲酰胺(PSA)纤维在防护领域具有广泛的应用,笔者在其纺丝溶液中引入苝系荧光功能材料POSS-PDI-POSS,通过静电纺制备了PSA纤维膜。研究了助纺剂聚丙烯腈(PAN)、共溶剂氯仿、荧光功能材料的引入对PSA溶液流变、电导率和纺丝成形性能的影响,发现在PAN添加量为3%(w)、氯仿添加量为6%(w)和0.4%(w)的POSS-PDI-POSS时可制备纤维直径集中分布在250～600 nm的纤维膜,该纤维膜可发射550 nm的黄绿色荧光(490 nm光激发)和发射580 nm的红色荧光(530 nm光激发)。

Optimal Resources Dispatching Technology of Distribution Network Rush-Repairing

Confronted with the requirement of higher efficiency and higher quality of distribution network fault rush-repair, the subject addressed in this paper is the optimal resource dispatching issue of the distribution network rush-repair when single resource center cannot meet the emergent resource demands. A multi-resource and multi-center dispatching model is established with the objective of “the shortest repair start-time” and “the least number of the repair centers”. The optimal and worst solutions of each objective are both obtained, and a “proximity degree method” is used to calculate the optimal resource dispatching plan. The feasibility of the proposed algorithm is illustrated by an example of a distribution network fault. The proposed method provides a practical technique for efficiency improvement of fault rush-repair work of distribution network, and thus mostly abbreviates power recovery time and improves the management level of the distribution network.

基于深共熔溶剂的电解液用于CuCl_(2)电化学行为研究

电解液是电化学体系的重要组成部分。近年来,科研领域新出现的电解液概念极大地丰富了电解液的内涵。为拓宽学生的知识构架,培养学生的创新和科学发展意识,有必要将新型的电解液概念引入物理化学课堂教学和实验教学中。本实验利用深共熔溶剂同时具备溶剂和电解液特点,对基于氯化胆碱的两种深共熔溶剂的粘度和电导率进行测定,并进一步应用于玻碳电极和Pt电极上CuCl2的循环伏安测定。本实验将科研成果引入教学中,引导学生了解学科领域的发展,有助于学生科学思维能力的培养,激发学生对科学研究的兴趣。

Coulomb exploded directional double ionization of N2O molecules in multicycle femtosecond laser pulses

We experimentally investigate Coulomb exploded directional double ionization of N2O molecules in elliptically polarized femtosecond laser pulses.The denitrogenation and deoxygenation channels are accessed via various pathways.It leads to distinct asymmetries in directional breaking of the doubly ionized N2O molecules versus the instantaneous laser field vector, which is revealed by tracing the sum-momentum spectra of the ionic fragments as a recoil of the ejected electrons.Our results demonstrate that the accessibility of the Coulomb exploded double ionization channels of N2O molecules are ruled by the detailed potential energy curves, and the directional emission of the fragments are governed by the joint effects of the electron localization-assisted enhanced ionization of the stretched molecules and the profiles of the molecular orbitals.

Antibody to collapsin response mediator protein 1 promotes neurite outgrowth from rat hippocampal neurons

This study examined the role of collapsin response mediator protein 1 （CRMP-1） on neurite outgrowth from rat hippocampal neurons by blocking its function using an antibody. Hippocampal neurons, cultured in vitro, were treated （blocked） using a polyclonal antibody to CRMP-1, and neurite outgrowth and cytoskeletal changes were captured using atomic force microscopy and laser confocal microscopy. Control cells, treated with normal rabbit IgG, established their characteristic morphology and had a large number of processes emerging from the soma, including numerous branches. Microtubules were clearly visible in the soma, formed an elaborate network, and were aligned in parallel arrays to form bundles which projected into neurites. After blocking with CRMP-1 antibody, the number of branches emerging from axons and dendrites significantly increased and were substantially longer, compared with control cells. However, the microtubule network nearly disappeared and only a few remnants were visible. When CRMP-1 antibody-blocked neurons were treated with the Rho inhibitor, Y27632, numerous neurites emerged from the soma, and branches were more abundant than in control neurons. Although the microtubules were not as clearly visible compared with neurons cultured in control medium, the microtubule network recovered in cells treated with Y27632, when compared with cells that were blocked by CRMP-1 antibody （but not treated with Y27632）. These results demonstrate that neurite outgrowth from hippocampal neurons can be promoted by blocking CRMP-1 with a polyclonal antibody.

Nomogram for Predicting the Severity of Coronary Artery Disease in Young Adults≤45 Years of Age with Acute Coronary Syndrome

Background:A non-invasive predictive model has not been established to identify the severity of coronary lesions in young adults with acute coronary syndrome(ACS).Methods:In this retrospective study,1088 young adults(≤45 years of age)first diagnosed with ACS who underwent coronary angiography were enrolled and randomized 7:3 into training or testing datasets.To build the nomogram,we determined optimal predictors of coronary lesion severity with the Least Absolute Shrinkage and Selection Operator and Random Forest algorithm.The predictive accuracy of the nomogram was assessed with calibration plots,and performance was assessed with the receiver operating characteristic curve,decision curve analysis and the clinical impact curve.Results:Seven predictors were identified and integrated into the nomogram:age,hypertension,diabetes,body mass index,low-density lipoprotein cholesterol,mean platelet volume and C-reactive protein.Receiver operating characteristic analyses demonstrated the nomogram’s good discriminatory performance in predicting severe coronary artery disease in young patients with ACS in the training(area under the curve 0.683,95%confidence interval[0.645–0.721])and testing(area under the curve 0.670,95%confidence interval[0.611–0.729])datasets.The nomogram was also well-calibrated in both the training(P=0.961)and testing(P=0.302)datasets.Decision curve analysis and the clinical impact curve indicated the model’s good clinical utility.Conclusion:A simple and practical nomogram for predicting coronary artery disease severity in young adults≤45 years of age with ACS was established and validated.

Review on the Command Platform of Production and Rush-Repairs for Distribution Network

The command platform of production and rush-repairs for distribution Network is a supporting platform, based on information technology, for the business applications of the command center. This article briefly described the basic functions and structural features of the platform, and discussed in detail the integration of business information, the contents and solutions needed to be focused on during inter-system data exchange, and the implementation techniques of the command platform. The benefits of the platform in the improvement of the distribution network production and rush-repairs are finally summed up. The entire above are provided as references.

Application of Rubidium in the Field of Medicine and Health

With the continuous development of science and technology,the role of rare and precious metal resources in medical treatment,economy and strategy has become increasingly prominent.This paper reviewed the application research of rare precious metal rubidium(Rb)in the field of medicine and health,mainly including the application significance of Rb in the field of medical and health,typical applications and problems in the field of medicine and health,and the important research significance of the research and development of medicine.

Highly selective and efficient photocatalytic NO removal:Charge carrier kinetics and interface molecular process

The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.

Aiming at early-stage vulnerable plaques:A nanoplatform with dual-mode imaging and lipid-inflammation integrated regulation for atherosclerotic theranostics

The vulnerable plaques in atherosclerosis can cause severe outcome with great danger of acute cardiovascular events.Thus,timely diagnosis and treatment of vulnerable plaques in early stage can effectively benefit the clinical management of atherosclerosis.In this work,a targeting theranostic strategy on early-stage vulnerable plaques in atherosclerosis is realized by a LAID nanoplatform with X-CT and fluorescent dual-mode imaging and lipid-inflammation integrated regulation abilities.The iodinated contrast agents(ICA),phenylboronic acid modified astaxanthin and oxidized-dextran(oxDEX)jointly construct the nanoparticles loaded with the lipid-specific probe LFP.LAID indicates an active targeting to plaques along with the dual-responsive disassembly in oxidative stress and acidic microenvironment of atherosclerosis.The X-CT signals of ICA execute the location of early-stage plaques,while the LFP combines with lipid cores and realizes the recognition of vulnerable plaques.Meanwhile,the treatment based on astaxanthin is performed for restraining the progression of plaques.Transcriptome sequencing suggests that LAID can inhibit the lipid uptake and block NF-κB pathway,which synergistically demonstrates a lipid-inflammation integrated regulation to suppression the plaques growing.The in vivo investigations suggest that LAID delivers a favorable theranostics to the early-stage vulnerable plaques,which provides an impressive prospect for reducing the adverse prognosis of atherosclerosis.

GTF2H4 regulates partial EndMT via NF-κB activation through NCOA3 phosphorylation in ischemic diseases

Partial endothelial-to-mesenchymal transition(EndMT)is an intermediate phenotype observed in endothelial cells(ECs)undergoing a transition toward a mesenchymal state to support neovascularization during(patho)physiological angiogenesis.Here,we investigated the occurrence of partial EndMT in ECs under hypoxic/ischemic conditions and identified general transcription factor IIH subunit 4(GTF2H4)as a positive regulator of this process.In addition,we discovered that GTF2H4 collaborates with its target protein excision repair cross-complementation group 3(ERCC3)to co-regulate partial EndMT.Furthermore,by using phosphorylation proteomics and site-directed mutagenesis,we demonstrated that GTF2H4 was involved in the phosphorylation of receptor coactivator 3(NCOA3)at serine 1330,which promoted the interaction between NCOA3 and p65,resulting in the transcriptional activation of NF-κB and the NF-kB/Snail signaling axis during partial EndMT.In vivo experiments confirmed that GTF2H4 significantly promoted partial EndMT and angiogenesis after ischemic injury.Collectively,our findings reveal that targeting GTF2H4 is promising for tissue repair and offers potential opportunities for treating hypoxic/ischemic diseases.

野油菜黄单胞菌中LipB-LipA是唯一的硫辛酰化途径

【目的】硫辛酸是细胞内重要的辅因子,参与多种基础代谢过程。野油菜黄单胞菌(Xcc)是十字花科植物黑腐病的病原菌,在全球范围内引起植物病害,引起重大经济损失。为此研究Xcc中硫辛酸的合成途径,为防治黑腐病提供新思路。【方法】利用大肠杆菌硫辛酸合成关键酶LipA和LipB序列,同源比对发现Xcc基因组中XC0713(XccLipA)和XC0712(XccLipB)具有较高的同源性。采用PCR方法分别扩增XccLipA和XccLipB基因,并连入表达载体pBAD24M后分别互补大肠杆菌突变株,并检测转化子生长表型。利用同源重组方法,获得替换突变株,分析其生长性状,并利用剪叶法检测替换突变株对寄主植物甘蓝的致病力。【结果】XcclipA和XcclipB能分别恢复大肠杆菌lipA和lipB突变株在基础培养上生长。XcclipA和XcclipB都是菌体生长的必需基因,不能直接被敲除。但导入pSRK-EclplA后,成功分别获得XcclipA和XcclipB敲除突变株。两种EclplA替换后的敲除突变株在基础培养上都不能生长,添加硫辛酸后能恢复生长表型。在丰富培养基上,XcclipB敲除突变株能正常生长,而XcclipA敲除突变株不能生长,添加硫辛酸后生长也能恢复。分别测定不同培养条件下生长曲线,也得到同样的结果。寄主植物侵染结果显示,与野生菌相比,XcclipA敲除突变株致病性几乎丧失,而XcclipB敲除突变株的致病性与野生菌无显著性差异。【结论】Xcc中lipA编码硫辛酸合成酶,lipB编码辛酰转移酶,两者都是必需基因。Xcc中LipB-LipA途径是唯一的硫辛酰化途径,而没有外源性的硫辛酸途径。lipA敲除后显著影响Xcc的致病性,可作为抗菌药物筛选的靶点。

年龄调整的Charlson合并症指数影响腹腔镜胃癌根治术患者预后的多中心回顾性研究

目的探讨年龄调整的Charlson合并症指数(ACCI)对腹腔镜胃癌根治术患者预后的影响。方法采用回顾性队列研究方法。收集2016年9月至2017年10月中国腹腔镜胃肠外科研究组-04研究中19家医院收治的242例(福建医科大学附属协和医院54例、莆田市第一医院32例、上海交通大学医学院附属仁济医院32例、福建医科大学附属漳州市医院31例、南方医科大学南方医院17例、南京医科大学第一附属医院11例、青海大学附属医院8例、梅州市人民医院8例、福建省立医院7例、复旦大学附属中山医院6例、龙岩市第一医院6例、新疆医科大学附属第一医院5例、陆军军医大学第一附属医院5例、广州中医药大学第二附属医院4例、四川大学华西医院4例、北京大学肿瘤医院4例、厦门大学附属第一医院3例、广东省人民医院3例、西安交通大学第一附属医院2例)行腹腔镜胃癌根治术患者的临床病理资料;男193例,女49例;年龄为62(23~74)岁。观察指标:(1)患者年龄分布与合并症及ACCI情况。(2)ACCI分组及临床病理特征比较。(3)术后早期并发症发生情况及术后早期并发症影响因素分析。(4)随访情况。(5)影响患者3年无复发生存率的因素分析。采用门诊或电话方式进行随访,了解患者术后生存情况。随访时间截至2020年12月。正态分布的计量资料以x±s表示,组间比较采用t检验;偏态分布的计量资料以M(Q_(1),Q_(3))或M(范围)表示,组间比较采用Mann-Whitney U检验。计数资料以绝对数或百分比表示,组间比较采用χ^(2)检验或Fisher确切概率法。等级资料比较采用非参数秩和检验。采用X-Tile软件(3.6.1)分析ACCI分组临界值。采用Kaplan-Meier法计算生存率和绘制生存曲线,采用Log-Rank检验进行生存分析。采用Logistic回归模型分析术后早期并发症影响因素。采用COX比例风险模型进行3年无复发生存率影响的单因素和多因素分析,多因素分析以逐步回归法纳入P<0.05的单因素指标和临床上与预后密切相关的变量。结果(1)患者年龄分布与合并症及ACCI情况。242例患者中,<50岁28例,50~59岁68例,60~69岁113例,70~79岁33例;合并轻度肝病、伴有终末器官损害的糖尿病、脑血管疾病、消化性溃疡、充血性心力衰竭、慢性肺疾病、不伴终末器官损害的糖尿病分别为1、1、2、2、6、8、9例。242例患者ACCI为2(0~4)。(2)ACCI分组及其临床病理特征比较。X-Tile软件分析结果显示:ACCI=3为最佳分组临界值。根据ACCI最佳分组临界值将242例患者分为低ACCI组(ACCI<3)194例和高ACCI组(ACCI≥3)48例。低ACCI组患者年龄,体质量指数,术前合并症,美国麻醉医师协会分级(Ⅰ级、Ⅱ级、Ⅲ级),肿瘤长径,组织学类型(印戒细胞癌或低分化腺癌、中分化或高分化腺癌),肿瘤病理学T分期(T1期、T2期、T3期、T4期),化疗周期分别为(58±9)岁,(22.6±2.9)kg/m2,31例,106、85、3例,(4.0±1.9)cm,104、90例,16、29、72、77例,6(4,6)个;高ACCI组患者上述指标分别为(70±4)岁,(21.7±2.7)kg/m2,23例,14、33、1例,(5.4±3.1)cm,36、12例,3、4、13、28例,4(2,5)个;两组患者上述指标比较,差异均有统计学意义(t=-14.37、1.98,χ^(2)=22.64,Z=-3.11,t=-2.91,χ^(2)=7.22,Z=-2.21、-3.16,P<0.05)。(3)术后早期并发症发生情况及术后早期并发症影响因素分析。242例患者中,33例发生术后早期并发症,包括局部并发症20例,系统性并发症16例,部分患者同时合并多种并发症。20例局部并发症包括腹腔感染12例,吻合口漏7例,切口感染、腹腔出血、吻合口出血各2例,淋巴液漏1例。16例系统性并发症包括肺部感染11例,心律失常、脓毒血症各2例,肝衰竭、肾衰竭、肺动脉栓塞、深静脉血栓、尿路感染、尿潴留各1例。33例发生术后早期并发症患者Clavien-Dindo并发症分级Ⅰ级、Ⅱ级、Ⅲa级、Ⅲb级、Ⅳ级分别为3、22、5、2、1例。低ACCI组患者术后早期并发症、局部并发症、系统性并发症分别为22、13、9例;高ACCI组患者上述指标分别为11、7、7例;两组患者早期并发症、系统性并发症比较,差异均有统计学意义(χ^(2)=4.38,4.66,P<0.05);局部并发症比较,差异无统计学意义(χ^(2)=2.20,P>0.05)。Logistic回归分析结果显示:ACCI是影响腹腔镜胃癌根治术后发生早期并发症的相关因素(比值比=2.32,95%可信区间为1.04~5.21,P<0.05)。(4)随访情况。242例患者均获得随访,随访时间为36(1~46)个月。随访期间,53例患者死亡,13例带瘤生存。242例患者3年无复发生存率为73.5%。低ACCI组患者随访时间为36(2~46)个月,随访期间,29例患者死亡,10例带瘤生存,患者3年无复发生存率为80.0%;高ACCI组患者上述指标分别为35(1~42)个月,24、3例,47.4%;两组患者3年无复发生存率比较,差异有统计学意义(χ^(2)=30.49,P<0.05)。(5)影响患者3年无复发生存率的因素分析。单因素分析结果显示:术前合并症、ACCI、肿瘤长径、组织学类型、血管侵犯、淋巴管侵犯、神经侵犯、肿瘤病理学TNM分期、术后早期并发症是影响腹腔镜胃癌根治术后3年无复发生存率的相关因素(风险比=2.52,3.64,2.62,0.47,2.87,1.90,1.86,21.77,1.97,95%可信区间为1.52~4.17,2.22~5.95,1.54~4.46,0.27~0.80,1.76~4.70,1.15~3.12,1.10~3.14,3.01~157.52,1.11~3.50,P<0.05)。多因素分析结果显示:ACCI、肿瘤病理学TNM分期、辅助化疗是腹腔镜胃癌根治术后3年无复发生存率的独立影响因素(风险比=3.65,11.00,40.66,0.39,95%可信区间为2.21~6.02,1.40~86.73,5.41~305.69,0.22~0.68,P<0.05)。结论ACCI是影响腹腔镜胃癌根治术后发生早期并发症的相关因素,ACCI、肿瘤病理学TNM分期、辅助化疗是腹腔镜胃癌根治术后3年无复发生存率的独立影响因素。