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分组密码复杂线性层可分性传播的MILP刻画方法

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软件学报 2024年第4期35卷 1980-1992页

作者：黄明张莎莎洪春雷曾乐向泽军湖北大学数学与统计学学院湖北武汉433062 上海大学通信与信息工程学院上海200444 Faculty of Science The University of MelbourneMelbourne VIC3010Australia

混合整数线性规划(MILP)作为一种自动化搜索工具,被广泛地应用于搜索分组密码的差分、线性、积分等密码性质.提出一种基于动态选取策略构建MILP模型的新技术,该技术在不同的条件下采用不同的约束不等式刻画密码性质的传播.具体地,从可... 详细信息

混合整数线性规划(MILP)作为一种自动化搜索工具,被广泛地应用于搜索分组密码的差分、线性、积分等密码性质.提出一种基于动态选取策略构建MILP模型的新技术,该技术在不同的条件下采用不同的约束不等式刻画密码性质的传播.具体地,从可分性出发根据输入可分性汉明重量的不同,分别采用不同的方法构建线性层可分性传播的MILP模型.最后,将该技术应用于搜索uBlock和Saturnin算法的积分区分器.实验结果表明:对于uBlock128算法,该技术可以搜索到比之前最优区分器多32个平衡比特的8轮积分区分器.除此之外,搜索到uBlock128和uBlock256算法比之前最优区分器更长一轮的9和10轮积分区分器.对于Saturnin256算法,同样搜索到比之前最优区分器更长一轮的9轮积分区分器.

关键词：混合整数线性规划可分性线性层汉明重量积分区分器

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我国藁杆双脐螺分子溯源研究

中国血吸虫病防治杂志 2024年第3期36卷 272-278,285页

作者：段磊屈磊郭云海顾文彪吕山张仪周晓农中国疾病预防控制中心寄生虫病预防控制所(国家热带病研究中心)、国家卫生健康委员会寄生虫病原与媒介生物学重点实验室、WHO热带病合作中心、科技部国家级热带病国际联合研究中心上海200025 复旦大学生命科学学院上海200438 上海交通大学医学院-国家热带病研究中心全球健康学院上海200025

目的了解我国藁杆双脐螺来源,为我国曼氏血吸虫病流行风险评估和双脐螺控制提供依据。方法选择我国深圳市观澜河,大沙河,深圳水库,葵涌河上、下游,新圳河作为采样点,每个采样点采集10个双脐螺样本,提取螺样本基因组DNA。自南美洲巴西米... 详细信息

目的了解我国藁杆双脐螺来源,为我国曼氏血吸虫病流行风险评估和双脐螺控制提供依据。方法选择我国深圳市观澜河,大沙河,深圳水库,葵涌河上、下游,新圳河作为采样点,每个采样点采集10个双脐螺样本,提取螺样本基因组DNA。自南美洲巴西米纳斯吉拉斯州、帕拉州、联邦区、伯南布哥州、圣保罗州的5个采样点获得15个藁杆双脐螺DNA样本。对上述DNA样本的细胞色素c氧化酶亚基Ⅰ(cytochrome c oxidaseⅠ,COI)和线粒体16S核糖体RNA(16S ribosomal RNA,16S rRNA)基因进行扩增和测序。同时,从GenBank中下载藁杆双脐螺COI和16S rRNA基因序列,并获取其采样点信息。将所有基因序列进行比对并构建进化树,分析我国和南美洲双脐螺样本的遗传相似度和谱系进化关系。结果从我国双脐螺样本中共获得60个长度为529 bp的COI序列,其中3个为单倍型。从GenBank中获得165条藁杆双脐螺COI序列,与上述60条序列比对后,共获得33个单倍型。进化树分析显示,采自我国的双脐螺3个单倍型聚在一支,其中单倍型China11与GenBank中获得的来自巴西的3个样本属于同一单倍型。地理进化分析结果显示,巴西东部沿海3个采样点的样本有与我国China11相同的单倍型,另2个采样点的样本与China11亲缘关系较近。扩增我国双脐螺样本16S r DNA基因,共获得60条长度约为322 bp的序列和2个单倍型。从GenBank中获得70条藁杆双脐螺16S rDNA序列。系统进化树分析显示,我国双脐螺样本聚为一支,其中单倍型China64与来自巴西的229BS为同一单倍型。将GenBank中获取的来自巴西南部25个采样点的49个藁杆双脐螺16S r DNA序列纳入分析,发现其中3个采样点的藁杆双脐螺与我国China64有相同的单倍型。综合分析藁杆双脐螺COI和16S rRNA的地理系统进化关系,发现仅巴西东部沿海地带样本与我国双脐螺样本在两个基因片段序列上具有相同单倍型。结论我国双脐螺为藁杆双脐螺,遗传多样性较低,与来自巴西东部沿海地区的样本遗传学相似度很高,可能来源于巴西东部沿海地区。

关键词：藁杆双脐螺曼氏血吸虫分子溯源线粒体16S核糖体RNA 细胞色素c氧化酶亚基Ⅰ 中国巴西

Bureaucratic Culture and Innovation

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China & World Economy 2024年第3期32卷 31-66页

作者： Shigang Li Kexin She Li zhang International School of Business and Finance Sun Yat-sen UniversityChina National School of Development Peking UniversityChina International School of Business and Finance Key Laboratory of Mesoeconomics and Coordinated Development of Regions and IndustriesSun Yat-sen UniversityChina

This study explores the effects of bureaucratic culture on *** define bureaucratic culture as a culture in which power and officials are held in the highest *** panel data of publicly listed Chinese manufacturing firms from 2007 to 2015,we found that bureaucratic culture negatively correlated with firms'patent output.A mechanism analysis shows that bureaucratic culture hindered corporate innovation by reducing firms'research and development inputs and decreasing innovation ***,we provided evidence that anti-corruption campaigns and the development of formal institutions could neutralize the negative impact of bureaucratic culture on corporate *** study is the first to investigate quantitatively the causal effect of bureaucratic culture on corporate innovation and it can deepen the understanding of the relationship between culture and innovation in *** speculate that promoting a creative culture,particularly one that fosters entrepreneurial spirit,is of utmost importance.

关键词： bureaucratic culture corporate innovation economic growth talent allocation

Early diagnosis of esophageal cancer:How to put“early detection”into effect?

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World Journal of Gastrointestinal Oncology 2024年第8期16卷 3386-3392页

作者： Suolang Pubu Jun-Wen zhang Jian Yang Department of Gastroenterology Changdu People’s Hospital of XizangChangdu 854000Tibet Autonomous RegionChina Department of Gastroenterology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

This editorial comments on the article by Qu et al in a recent edition of World Journal of Gastrointestinal Oncology,focusing on the importance of early diagnosis in managing esophageal cancer and strategies for achieving“early detection”.The five-year age-standardized net survival for esophageal cancer patients falls short of *** detection and accurate diagnosis are critical strategies for improving the treatment outcomes of esophageal *** advancements in endoscopic technology have been significant,there seems to be an excessive emphasis on the latest high-end endoscopic devices and various endoscopic resection ***,it is imperative to redirect focus towards proactive early detection strategies for esophageal cancer,investigate the most cost-effective screening methods suitable for different regions,and persistently explore practical solutions to improve the five-year survival rate of patients with esophageal cancer.

关键词： Esophageal cancer Early diagnosis Early detection Iodine staining Five-year survival rate

绿色信贷、技术进步对黄河流域碳排放影响的空间效应

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人民黄河 2024年第7期46卷 1-7页

作者：宗鑫冯甜张光晨马明娟北方民族大学经济学院宁夏银川750021 北方民族大学数学与信息科学学院宁夏银川750021

绿色信贷和技术进步在抑制碳排放方面具有重要作用,为了给黄河流域九省(区)尽快降低碳排放量及高质量发展提供参考,依据2008—2020年黄河流域九省(区)面板数据,基于各省(区)间的地理距离矩阵、经济距离矩阵计算碳排放量全局莫兰指数、... 详细信息

绿色信贷和技术进步在抑制碳排放方面具有重要作用,为了给黄河流域九省(区)尽快降低碳排放量及高质量发展提供参考,依据2008—2020年黄河流域九省(区)面板数据,基于各省(区)间的地理距离矩阵、经济距离矩阵计算碳排放量全局莫兰指数、构建空间杜宾计量模型,分析了绿色信贷、技术进步影响黄河流域九省(区)碳排放量的空间效应和协同效应。结果表明:1)黄河流域九省(区)的碳排放量存在空间相关性,主要呈现“低-低”集聚和“高-高”集聚,绿色信贷和能源使用技术进步对碳排放量影响的空间效应显著;2)绿色信贷对碳排放量的影响具有明显的抑制作用和空间溢出效应,广义技术进步对黄河流域九省(区)碳排放量影响不大,能源使用技术进步对本省(区)和相邻省(区)碳排放量均具有长效抑制作用;3)能源使用技术进步与绿色信贷在促进黄河流域九省(区)降碳减排方面具有协同效应。

关键词：绿色信贷技术进步碳排放量空间计量黄河流域

Mechanical effects of circular liquid inclusions inside soft matrix:role of internal pressure change and surface tension

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Applied Mathematics and Mechanics(English Edition) 2021年第4期42卷 501-510页

作者： lei zhang College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China

The mechanical effects of dilute liquid inclusions on the solid-liquid composite are explored,based on an analytical circular inclusion model incorporating the internal pressure change of the liquid and the surface tension of the *** simple explicit dependences of the stress field and effective stiffness on the bulk modulus and the size of the liquid,the surface tension,and Poisson’s ratio of the matrix are *** results show that the stresses in the matrix are reduced,and the stiffness of the solid-liquid composite is enhanced with the consideration of either the surface tension or the internal pressure ***,the effective Young’s modulus predicted by the present model for either soft or stiff matrices agrees well with the known experimental *** addition,according to the theoretical results,it is possible to stiffen a soft solid by pressured gas with the presence of the surface tension of the solid-gas interface.

关键词： liquid inclusion stress field effective stiffness surface tension internal pressure change

A Novel Anti-Collision Algorithm for Large Scale of UHF RFID Tags Access Systems

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Computers, Materials & Continua 2024年第7期80卷 897-912页

作者： Xu zhang Yi He Haiwen Yi Yulu zhang Yuan Li Shuai Ma Gui Li Zhiyuan Zhao Yue Liu Junyang Liu Guangjun Wen Jian Li School of Information and Communication Engineering/Yibin Institute University of Electronic Science and Technology of ChinaChengdu611731China Department of IoT Technology Research China Mobile Research InstituteBeijing100053China The 10th Research Institute of China Electronics Technology Group Corporation Chengdu611731China College of Information and Communication National University of Defense TechnologyWuhan430019China

When the radio frequency identification(RFID)system inventories multiple tags,the recognition rate will be seriously affected due to *** on the existing dynamic frame slotted Aloha(DFSA)algorithm,a sub-frame observation and cyclic redundancy check(CRC)grouping combined dynamic framed slotted Aloha(SUBF-CGDFSA)algorithm is *** algorithm combines the precise estimation method of the quantity of large-scale tags,the large-scale tags grouping mechanism based on CRC pseudo-randomcharacteristics,and the Aloha anti-collision optimization mechanism based on sub-frame *** grouping tags and sequentially identifying themwithin subframes,it accurately estimates the number of remaining tags and optimizes frame length accordingly to improve efficiency in large-scale RFID *** outcomes demonstrate that this proposed algorithmcan effectively break through the system throughput bottleneck of 36.8%,which is up to 30%higher than the existing DFSA standard scheme,and has more significant advantages,which is suitable for application in largescale RFID tags scenarios.

关键词： Radio frequency identification anti-collision tags grouping dynamic framed slotted Aloha

Development of a novel staging classification for Siewert Ⅱ adenocarcinoma of the esophagogastric junction after neoadjuvant chemotherapy

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2541-2554页

作者： Jian zhang Hao Liu Hang Yu Wei-Xiang Xu Department of Gastrointestinal Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina

BACKGROUND Stage classification for Siewert Ⅱ adenocarcinoma of the esophagogastric junction(AEG)treated with neoadjuvant chemotherapy(NAC)has not been *** To investigate the optimal stage classification for Siewert Ⅱ AEG with *** A nomogram was established based on Cox regression model that analyzed variables associated with overall survival(OS)and disease-specific survival(DSS).The nomogram performance in terms of discrimination and calibration ability was evaluated using the likelihood-ratio test,Akaike information criterion,Harrell concordance index,time-receiver operating characteristic curve,and decision curve *** Data from 725 patients with Siewert type Ⅱ AEG who underwent neoadjuvant therapy and gastrectomy were obtained from the Surveillance,Epidemiology,and End Results *** and multivariate analyses revealed that sex,marital status,race,ypT stage,and ypN stage were independent prognostic factors of OS,whereas sex,race,ypT stage,and ypN stage were independent prognostic factors for *** factors were incorporated into the OS and DSS *** novel nomogram model performed better in terms of OS and DSS prediction compared to the 8th American Joint Committee of Cancer pathological staging system for esophageal and gastric ***,a user-friendly web application was developed for clinical *** The nomogram established specifically for patients with Siewert type Ⅱ AEG receiving NAC demonstrated good prognostic *** using external data is warranted before its widespread clinical application.

关键词： Stage classification Prognosis Esophagogastric junction cancer Neoadjuvant chemotherapy Siewert type

合并脊髓受累的瘤样原发性中枢神经系统血管炎一例

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中国医学科学院学报 2024年第3期46卷 466-470页

作者：张莉孙慧张世敏高赛武雷黄德晖中国人民解放军总医院第一医学中心神经内科医学部北京100853 南阳市第一人民医院神经内科河南南阳473000

原发性中枢神经系统血管炎(PACNS)是一种发生在中枢神经系统的主要侵犯脑、脊髓及软脑膜的中小血管的血管炎性疾病。瘤样PNCAS是PACNS的少见亚型,常被误诊为颅内恶性肿瘤,脊髓受累在PACNS中更为罕见。PACNS因临床症状及影像学表现缺乏... 详细信息

原发性中枢神经系统血管炎(PACNS)是一种发生在中枢神经系统的主要侵犯脑、脊髓及软脑膜的中小血管的血管炎性疾病。瘤样PNCAS是PACNS的少见亚型,常被误诊为颅内恶性肿瘤,脊髓受累在PACNS中更为罕见。PACNS因临床症状及影像学表现缺乏特异性,早期诊断困难。本文报道1例经病理确诊合并脊髓受累的瘤样PACNS,以提高对该病的认识。

关键词：原发性中枢神经系统血管炎脊髓受累肌电图