检索结果-南通市图书馆

集成电路应用 2024年第3期41卷 266-267页

作者：党政延长油田股份有限公司南泥湾采油厂陕西716000

阐述配电线路安全运行管理中的问题及原因,探讨计算机仿真技术在优化过程中的应用。通过建立准确的模型和仿真环境,利用大数据分析和优化算法,提出一种基于计算机仿真的方法。

关键词：计算机仿真技术配电线路优化大数据分析

1990—2019年中国胆囊癌疾病负担研究及未来趋势分析

在线全文

学校读者我要写书评

暂无评论

中国全科医学 2024年第14期27卷 1742-1749页

作者：刘珊山李初谊郑英卢利霞李斌于晓辉党政中国人民解放军联勤保障部队第九四〇医院甘肃省兰州市730050 甘肃中医药大学第一临床医学院甘肃省兰州市730050

背景胆囊癌早期发现难度大,治疗效果不佳,病死率很高,对于胆囊癌流行病学的进一步研究,可为胆囊癌的防治策略制订提供一定价值数据依据。目的分析1990—2019年中国胆囊癌疾病负担流行趋势,估计其年龄、时期和队列效应及未来变化趋势。... 详细信息

背景胆囊癌早期发现难度大,治疗效果不佳,病死率很高,对于胆囊癌流行病学的进一步研究,可为胆囊癌的防治策略制订提供一定价值数据依据。目的分析1990—2019年中国胆囊癌疾病负担流行趋势,估计其年龄、时期和队列效应及未来变化趋势。方法于2023年3—6月检索2019年全球疾病负担研究(GBD 2019)数据库,提取1990—2019年中国胆囊癌的发病率、患病率、死亡率、伤残调整寿命年(DALYs)率以及对应的标化率等疾病负担相关数据,通过Joinpoint软件计算其年度变化百分比(APC)、平均年度变化百分比(AAPC)分析1990—2019年中国胆囊癌的疾病负担变化趋势情况。构建贝叶斯年龄-时期-队列(BAPC)模型预测2020—2030年中国胆囊癌的发病情况。结果1990—2019年中国胆囊癌标化发病率由1990年1.58/10万上升至2019年的2.01/10万,AAPC为0.82%(95%CI=0.65%~1.00%);标化患病率由1990年的1.64/10万上升至2019年的2.40/10万,AAPC为1.34%(95%CI=1.14%~1.54%);标化死亡率由1990年的1.61/10万上升至2019年的1.82/10万,AAPC为0.40%(95%CI=0.24%~0.56%);标化DALYs率由1990年的35.18/10万上升至2019年的37.71/10万,AAPC为0.25%(95%CI=0.12%~0.38%);趋势变化均具有统计学意义(P<0.001)。BAPC模型分析结果显示,1990—2019年中国胆囊癌发病率和死亡率净漂移值分别为0.99(95%CI=0.81~1.18)和0.42(95%CI=0.21~0.63),胆囊癌发病率和死亡率随年龄增长均呈上升趋势,80岁及以上年龄组人群胆囊癌发病率均达到最高,发病和死亡风险随时期推移均呈现先下降后上升再下降趋势,均在2005—2009年达峰值,随出生队列推移均呈现先上升后下降趋势。BAPC模型预测结果显示,2020—2030年中国胆囊癌造成的标化发病率、患病率、死亡率和DALYs率均呈略微上升趋势。结论1990—2019年中国胆囊癌标化发病率、患病率、死亡率和DALYs率均呈上升趋势,疾病负担仍较为严重,应加强男性人群和老年人群胆囊癌防治,大力开展防癌知识宣传、控制胆管疾病和推广健康生活方式,以降低胆囊癌疾病负担。

关键词：胆囊肿瘤胆囊癌全球疾病负担发病率患病率死亡率伤残调整寿命年趋势分析

同方期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

过失犯的正当化事由研究

甘肃政法大学学报 2024年第1期 57-69页

作者：朴宗根党政西北政法大学刑事法学院西北政法大学陕西省乾县人民检察院

依据三阶层的犯罪论体系,犯罪过失具有双重机能,既是构成要件要素又是责任要素,而且在评价内容上也有所不同.从理论上讲,具备构成要件符合性的过失行为可以成立正当防卫的正当化事由,实践中也有相关判例.但依据我国传统刑法理论,对违法... 详细信息

依据三阶层的犯罪论体系,犯罪过失具有双重机能,既是构成要件要素又是责任要素,而且在评价内容上也有所不同.从理论上讲,具备构成要件符合性的过失行为可以成立正当防卫的正当化事由,实践中也有相关判例.但依据我国传统刑法理论,对违法性不能独立进行评价或判断,所以从法律效果而言,只能直接地、无条件地排除犯罪构成.在实践中,因过失犯的社会危害性明显小于故意犯,对存在正当化事由的过失犯罪,一般通过刑法第13条之规定出罪,但这种处理方式缺乏充分的论证和必要的理论支撑.因此,内地法系国家刑法关于过失犯的正当化理论,对我国过失犯排除社会危害性理论体系的构建有一定的启示意义.

关键词：过失犯正当化事由违法性正当防卫紧急避险

维普期刊数据库博看期刊

等温温度对Ti-Mo微合金高强双相钢相变及组织性能的影响

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2024年第8期45卷 146-153页

作者：何平王巍李群芳王礼凡党正卓胡海江武汉科技大学耐火材料与冶金国家重点实验室湖北武汉430081 宝山钢铁股份有限公司中央研究院上海201999

采用热模拟实验、光学显微镜、显微硬度仪和透射电镜等研究了等温温度对Ti-Mo微合金高强双相钢相变、组织及性能的影响。结果表明:当等温温度在750~725℃时,实验钢组织主要为马氏体+少量贝氏体或铁素体,随着等温温度降低(≤700℃),铁素... 详细信息

采用热模拟实验、光学显微镜、显微硬度仪和透射电镜等研究了等温温度对Ti-Mo微合金高强双相钢相变、组织及性能的影响。结果表明:当等温温度在750~725℃时,实验钢组织主要为马氏体+少量贝氏体或铁素体,随着等温温度降低(≤700℃),铁素体含量增多,排碳行为增加了过冷奥氏体的稳定性,抑制了中低温区贝氏体相变,在随后的冷却阶段,过冷奥氏体更倾向转变为马氏体。铁素体与马氏体的显微硬度均随等温温度降低而增加,但进一步降低温度,马氏体硬度基本保持稳定(361 HV0.1);650℃时铁素体显微硬度最高(242 HV0.1),这主要是由于铁素体内部产生了大量细小的相间析出,同时析出强化作用减小了铁素体与马氏体的硬度差异,降低了双相钢强度对马氏体体积分数的依赖性,等温温度较高时,相间析出形成被抑制。

关键词：铁素体/马氏体双相钢 Ti-Mo微合金钢等温相变相间析出显微硬度

Optimal impulsive rendezvous for highly elliptical orbits using linear primer vector theory

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第3期37卷 194-207页

作者： Maozhang zheng Jianjun LUO Zhaohui dang National Key Laboratory of Aerospace Flight Dynamics Northwestern Polytechnical UniversityXi’an 710072China

In this paper,minimum-fuel rendezvous is investigated for the case in which the reference orbit is highly *** this end,the well-known Tschauner-Hempel equations are used to describe the relative motions between rendezvous spacecraft and the ***’s primer vector theory is then applied on this linear but time-varying *** analytical solution of the required primer vector for this problem is then derived by using a recently developed *** the existing non-optimal solutions which don’t satisfy the conditions,the methods are further designed to improve the performance by shifting impulses or adding a new ***,two algorithms are developed for free-impulse time-fixed rendezvous *** first algorithm can determine the globally optimal trajectory with the optimal number of *** second one enables for fast trajectory *** proposed algorithms have been successfully applied to coplanar and three-dimensional rendezvous problems in which the target is flying on highly elliptical orbits.

关键词： Orbital transfer Optimal trajectory Primer vector Tschauner-Hempel equations Globally planning Fast planning

在线全文

学校读者我要写书评

暂无评论

定日镜场的输出热功率计算模型

台州学院学报 2024年第3期46卷 1-8,15页

作者：郑铛陆尹立胡宇冬李韶伟台州学院电子与信息工程学院浙江临海317000

基于全国大学生数学建模竞赛赛题的定日镜场分布数据,根据太阳视运动方法,建立太阳跟踪运动模型、阴影挡光效率理论模型、相邻定日镜遮挡选取模型与镜面反射光锥模型,得出了定日镜场的年平均光学效率、年平均输出热功率,以及单位面积的... 详细信息

基于全国大学生数学建模竞赛赛题的定日镜场分布数据,根据太阳视运动方法,建立太阳跟踪运动模型、阴影挡光效率理论模型、相邻定日镜遮挡选取模型与镜面反射光锥模型,得出了定日镜场的年平均光学效率、年平均输出热功率,以及单位面积的镜面年平均输出热功率,最后通过输出功率的拟合结果展现了模型的合理性。

关键词：定日镜遮挡阴影挡光效率太阳跟踪运动镜面反射光锥

Molecular mechanisms of stress resistance in sorghum: Implications for crop improvement strategies

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第3期23卷 741-768页

作者： Hongxiang zheng Yingying dang Xianmin Diao Na Sui Shandong Provincial Key Laboratory of Plant Stress/College of life Sciences Shandong Normal UniversityJinan 250014China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Abiotic stresses, such as drought, salt, extreme temperatures, and heavy metal pollution, are the main environmental factors that limit crop growth and yield. Sorghum, a C4 grass plant with high photosynthetic efficiency, can grow in adverse environmental conditions due to its excellent stress resistance characteristics. Therefore, unraveling the stress-resistance mechanism of sorghum could provide a theoretical basis for developing and cultivating various stress-resistant crops. This understanding could also help to create a conducive environment for using marginal soil in agriculture and ensuring food security. In this review, we discuss the adaptation mechanisms of sorghum under drought, salinity, temperature, and soil heavy metal stresses, the specific response to stress, the screening of sorghum-resistant germplasm, and the identification and functional analysis of the relevant genes and quantitative trait loci(QTL). In addition, we discuss the application potential of different stress-tolerant sorghum germplasms reported to date and emphasize the feasibility and potential use in developing and promoting highly stress-tolerant sorghum in marginal soil.

关键词： abiotic stress C4 plants QTL sorghum stress resistance yield stability

Impact of pathological response after preoperative transcatheter arterial chemoembolization(TACE)on incidences of microvascular invasion and early tumor recurrence in hepatocellular carcinoma:a multicenter propensity score matching analysis

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2022年第3期11卷 386-399页

作者： Yun Yang zheng dang Peng Lu Youwen Qian Kongying Lin Zeya Pan Wan Yee Lau Weiping Zhou The Third Department of Hepatic Surgery Eastern Hepatobiliary Surgery HospitalShanghaiChina Department of Hepatobiliary Surgery 940 Hospital of PLA Joint Logistic Support ForceLanzhouChina Department of Hepatobiliary Surgery Hainan Hospital of Chinese PLA General HospitalSanyaChina Department of Pathology Eastern Hepatobiliary Surgery HospitalShanghaiChina Department of Hepatopancreatobiliary Surgery Mengchao Hepatobiliary Hospital of Fujian Medical UniversityFuzhouChina Faculty of Medicine the Chinese University of Hong KongHong KongChina Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer(SMMU) Ministry of EducationShanghaiChina Shanghai Key Laboratory of Hepatobiliary Tumor Biology(EHBH) ShanghaiChina

Background:To study the influence of pathological responses(PR)after transcatheter arterial chemoembolization(TACE)on incidences of microvascular invasion(MVI)and early recurrence in hepatocellular carcinoma(HCC)***:Between 2013 to 2015,consecutive HCC patients who underwent liver resection with“curative”intent at three hospitals were enrolled in this *** with different areas of PR after preoperative TACE were compared with those without preoperative TACE on the incidences of MVI,early recurrence rates and patterns of recurrence before and after propensity score matching(PSM).Results:Of 1,970 patients,737 patients who received preoperative TACE were divided into three groups according to the areas of PR:≥90%(n=226),60-90%(n=447),and<60%(n=64).PR≥90%was an independent protective factor of incidences of MVI[odds ratio(OR),0.144;95%confidence interval(CI),0.082-0.245,P<0.001)and early recurrence(HR,0.742;95%CI,0.561-0.963,P=0.032);while PR<60%was an independent risk factor of incidences of MVI(OR,6.076;95%CI,3.004-11.728,P<0.001)and early recurrence(HR,1.428;95%CI,1.095-1.929;P=0.009).Furthermore,patients with PR<60%were significantly more likely to develop multiple intrahepatic recurrences involving multiple hepatic segments when compared with patients without preoperative ***:This study indicated the area of PR after TACE was closely associated with the incidences of MVI and early tumor *** with PR<60%were at significantly higher risks of having more MVI,early and multiple tumor recurrences.

关键词： Hepatocellular carcinoma(HCC) transcatheter arterial chemoembolization(TACE) pathological response microvascular invasion(MVI) early recurrence

Phase Transitions for Products of Characteristic Polynomials under Dyson Brownian Motion

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2021年第3期37卷 509-524页

作者： Peter J.FORRESTER dang-zheng LIU ARC Centre of Excellence for Mathematical and Statistical Frontiers School of Mathematics and StatisticsThe University of MelbourneVictoria 3010Australia CAS Key Laboratory of Wu Wen-Tsun Mathematics School of Mathematical SciencesUniversity of Science and Technology of ChinaHefei 230026P.R.China

We study the averaged products of characteristic polynomials for the Gaussian and Laguerre β-ensembles with external source, and prove Pearcey-type phase transitions for particular full rank perturbations of source. The phases are characterised by determining the explicit functional forms of the scaled limits of the averaged products of characteristic polynomials, which are given as certain multidimensional integrals, with dimension equal to the number of products.

关键词： Random matrices Dyson Brownian motion β-ensembles phase transitions

Boron-doped high-entropy oxide toward high-rate and long-cycle layered cathodes for wide-temperature sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第8期95卷 577-587,I0012页

作者： Yuzhen dang Zhe Xu Yurong Wu Runguo zheng Zhiyuan Wang Xiaopin Lin Yanguo Liu zheng-Yao Li Kai Sun Dongfeng Chen Dan Wang School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina Neutron Scattering Laboratory Department of Nuclear PhysicsChina Institute of Atomic EnergyBeijing 102413China

03-type layered metal oxides hold great promise for sodium-ion batteries cathodes owing to their energy density ***,the severe irreversible phase transition and sluggish Na^(+)diffusion kinetics pose significant challenges to achieve high-performance layered ***,a boron-doped03-type high entropy oxide Na(Fe_(0.2)Co_(0.15)Cu_(0.05)Ni_(0.2)Mn_(0.2)Ti_(0.2))B_(0.02)O_(2)(NFCCNMT-B_(0.02))is designed and the covalent B-O bonds with high entropy configuration ensure a robust layered *** obtained cathode NFCCNMT-B_(0.02)exhibits impressive cycling performance(capacity retention of 95%and 82%after100 cycles and 300 cycles at 1 and 10 C,respectively)and outstanding rate capability(capacity of 83 mAh g^(-1)at 10 C).Furthermore,the NFCCNMT-B_(0.02)demonstrates a superior wide-temperature performance,maintaining the same capacity level(113,4 mAh g^(-1)@-20℃,121 mAh g^(-1)@25℃,and 119 mAh g^(-1)@60℃)and superior cycle stability(90%capacity retention after 100 cycles at 1 C at-20℃).The high-entropy configuration design with boron doping strategy contributes to the excellent sodium-ion storage *** high-entropy configuration design effectively suppresses irreversible phase transitions accompanied by small volume changes(ΔV=0.65 A3).B ions doping expands the Na layer distance and enlarges the P3 phase region,thereby enhancing Na^(+)diffusion *** work offers valuable insights into design of high-performance layered cathodes for sodium-ion batteries operating across a wide temperature.

关键词： High entropy oxide Born substitution Phase transition Na~+diffusion kinetics Sodium-ion batteries