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Cryptanalysis of dragon scheme

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The Journal of China Universities of Posts and Telecommunications 2010年第4期17卷 80-87页

作者： yuAN feng HU yu-pu wang yan OU Hai-wen Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China School of Science Xi'an University of Architecture and Technology Xi'an 710055 China Key Laboratory of Information Security Beijing Electronic Science and Technology Institute Beijing 100070 China

Patarin proposed the dragon scheme, pointed out the insecurity of the dragon algorithm with one hidden monomial and suggested a candidate dragon signature algorithm with a complicated function. This paper presents an algebraic method to attack the candidate dragon signature algorithm. The attack borrows the basic idea of the attack due to Kipnis and Shamir, and utilizes the underlying algebraic structure of the candidate dragon signature algorithm over the extension field to derive a way to enable the variable Y be viewed as a fixed value. The attack recovers the private keys efficiently when the parameters are n≤2s and D=[logq^d]≤3.

关键词： cryptography public key cryptography polynomials mapping multivariate dragon scheme algebraic method cryptanalysis

浆膜受侵局部进展期胃癌腹腔镜根治术远期疗效分析

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中华外科杂志 2024年第8期62卷 744-750页

作者：李平昂张帆李政焰石彦钱锋赵永亮陈军谭陈俊王宗文温燕余佩武陆军军医大学第一附属医院普通外科重庆400038

目的探讨腹腔镜胃癌根治术治疗浆膜受侵局部进展期胃癌的远期效果和预后因素。方法本研究为回顾性队列研究。回顾性分析2012年10月至2018年10月陆军军医大学第一附属医院普通外科收治的495例行腹腔镜胃癌根治术的患者资料,男性356例,女... 详细信息

目的探讨腹腔镜胃癌根治术治疗浆膜受侵局部进展期胃癌的远期效果和预后因素。方法本研究为回顾性队列研究。回顾性分析2012年10月至2018年10月陆军军医大学第一附属医院普通外科收治的495例行腹腔镜胃癌根治术的患者资料,男性356例,女性139例,年龄[M(IQR)]59(16)岁(范围:18~75岁)。观察和记录患者的术后情况和远期疗效。采用Kaplan-Meier法绘制生存曲线。影响患者预后的单因素及多因素分析采用Cox比例风险模型。结果全部495例患者中,57例失访,失访率为11.5%。随访时间89(40)个月(范围:23~134个月)。5年无病生存率和总体生存率分别为56.0%和58.2%。ⅡB、ⅢA、ⅢB、ⅢC期患者5年无病生存率分别为71.2%、60.5%、51.6%、33.3%,5年总体生存率分别为71.2%、62.2%、54.1%、39.3%。多因素分析结果显示,年龄>65岁(无病生存:HR=1.402,95%CI:1.022~1.922,P=0.036;总体生存:HR=1.461,95%CI:1.057~2.019,P=0.022)、淋巴结清扫数目<25枚(无病生存:HR=1.348,95%CI:1.019~1.779,P=0.036;总体生存:HR=1.376,95%CI:1.035~1.825,P=0.028)、病理学Ⅲ期(无病生存:HR=2.131,95%CI:1.444~3.144,P<0.01;总体生存:HR=2.079,95%CI:1.406~3.074,P<0.01)及未辅助化疗(无病生存:HR=3.127,95%CI:2.377~4.113,P<0.01;总体生存:HR=3.768,95%CI:2.828~5.020,P<0.01)是患者无病生存率及总体生存率的独立不良预后因素。结论腹腔镜胃癌根治术治疗浆膜受侵局部进展期胃癌远期肿瘤学效果满意。更多的淋巴结清扫数目、术后行规范辅助化疗有望进一步提高此类患者腹腔镜胃癌根治术的预后。

关键词：胃肿瘤胃切除术腹腔镜检查浆膜局部进展期胃癌治疗结果

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我国主要麦区小麦籽粒和面粉铁含量的影响因素

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植物营养与肥料学报 2024年第4期30卷 627-640页

作者：孙蕊卿党海燕佘文婷王星舒褚宏欣王涛丁玉兰徐隽峰王朝辉西北农林科技大学资源环境学院/农业农村部西北植物营养与农业环境重点实验室陕西杨凌712100 西北农林科技大学/旱区作物逆境生物学国家重点实验室陕西杨凌712100

[目的]明确主要麦区小麦籽粒铁含量,查明影响籽粒铁向面粉分配的主要因素,为提升我国小麦铁营养提供科学依据。[方法]于2020-2021和2021-2022年两个小麦生长季,在我国17个小麦主产省/区采集424份小麦植株和土壤样品,研究小麦籽粒、面粉... 详细信息

[目的]明确主要麦区小麦籽粒铁含量,查明影响籽粒铁向面粉分配的主要因素,为提升我国小麦铁营养提供科学依据。[方法]于2020-2021和2021-2022年两个小麦生长季,在我国17个小麦主产省/区采集424份小麦植株和土壤样品,研究小麦籽粒、面粉和麸皮铁含量与小麦产量和产量构成、土壤pH以及土壤有机质、有效磷、速效钾和有效态微量元素含量的关系。[结果]我国小麦籽粒、面粉和麸皮铁含量平均分别为38.8、13.9和86.7 mg/kg,其中90.3%的籽粒和93.9%的面粉样本铁含量未达到分别为50和21 mg/kg的推荐含量。春麦区,较高的土壤有机质(37.4 g/kg)和全氮(1.90 g/kg)含量提高了土壤铁的有效性,促进了小麦对铁的吸收和铁向籽粒的转移,使得小麦籽粒和面粉铁含量相对较高,分别为41.5和15.4 mg/kg;铁含量适中组小麦收获指数、穗粒数和千粒重分别比低铁组减少13.1个百分点、32.2%和31.3%。旱作区的土壤有机质(19.7g/kg)和有效铁含量(8.9 mg/kg)在4个麦区中最低,不利于小麦对铁元素的吸收和累积,使得籽粒与面粉铁含量较低,分别为39.2和14.3 mg/kg。麦玉区(小麦–玉米区)的小麦产量显著高于其他麦区,受产量“稀释效应”的影响,籽粒和面粉铁含量最低,分别为36.7和12.7 mg/kg。稻麦区(水稻–小麦区),较高的土壤有效铁含量(133.4 mg/kg)和较低的pH值(6.6)使得小麦籽粒铁含量在4个麦区中最高,籽粒中的铁更易于向面粉转移和累积,籽粒与面粉铁含量分别为41.3和15.6 mg/kg;铁含量适中组的小麦穗粒数比低铁组增加了15.7%,千粒重降低了14.7%。[结论]适宜的土壤pH和较高的有机质、全氮及有效铁含量是小麦籽粒和面粉铁含量的关键影响因素。此外,还需通过管理措施优化穗数、穗粒数和千粒重,避免可能的稀释效应。

关键词：小麦籽粒面粉麸皮铁含量土壤pH 有效铁

Charge transporting materials for perovskite solar cells

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Rare Metals 2021年第10期40卷 2690-2711页

作者： Ting Ji Ying-Kui wang Lin feng Guo-Hui Li wen-yan wang Zhan-feng Li yu-Ying Hao yan-Xia Cui College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of TechnologyTaiyuan 030024China

Perovskite solar cells(PSCs) have made great progress since 2009 and become the focus of current research. As an important part of PSCs, charge transporting materials play an important role in the performance of the devices. In this review, we introduce the evolution of electron and hole transporting materials in PSCs in recent years and summarize some typical charge transporting materials and their applications in PSCs. For electron transporting materials, metal oxides(TiO_(2), SnO_(2) and ZnO) and organic materials(fullerenes, non-fullerenes and their derivatives)are the most widely used materials in PSCs. For hole transporting materials, small molecule spiro-OMeTAD(2,2’,7,7’-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9’-spirobifluorene), polymer PEDOT:PSS(poly(3,4-ethylenedioxythiophene): polystyrene sulfonate), PTAA(poly-[bi(4-phenyl)](2,4,3-trimethylphenyla-mine)), P3 HT(poly(3-hexythiophene)) and inorganic materials(NiOx, CuSCN, CuO) are adopted in PSCs. Finally, different types of charge transporting materials are summarized and their future development is prospected.

关键词： Perovskite Solar cells Electron transporting materials Hole transporting materials

A series of carbosilane dendrimers with acetyl end-group:From synthesis to their unique optical characteristics

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Chinese Chemical Letters 2009年第9期20卷 1085-1087页

作者： wen yan Sun Hai feng Lu Deng Xu wang Sheng yu feng School of Chemistry and Chemical Engineering Shandong University Ji'nan 250100 China

A series of c arbosilane dendrimers with acetyl end-group were synthesized. Their structures were characterized by 1H NMR, IR, and MS, respectively. Then dendrimers were coordinated with lanthanide ions （Eu3＋ and Tb3＋, respectively）. The luminescence spectra of the complexes show narrow-width emissions in visible light region. 2009 Sheng yu feng. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Synthesis Carbosilane dendrirner Luminescence Lanthanide ions

A thermochemical model description of CaO-SiO2-Al2O3 silicate system

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China Foundry 2023年第6期20卷 480-490页

作者： Qiu-lin wen feng-man Shen Hai-yan Zheng yun-bao Gao yu wang yan-chun Lou National Key Laboratory of Advanced Casting Technologies Liaoning Academy of Materials 3. School of Metallurgy Northeastern University

A thermochemical model based on the ion and molecule coexistence theory(IMCT) was developed to calculate thermodynamic data in the CaO-SiO2-Al2O3slag system, considering the influential role of oxide activities on the thermodynamic properties of slags. Using this model, iso-activity contours were obtained for oxide components CaO, SiO2and Al2O3in this system at temperatures of 1,873 K and 1,773 K. When compared with the IMCT model, it is found that the predicted activities of oxide components in the CaO-SiO2-Al2O3system using the model developed in this study better matches experimental data from literature in terms of both trend and numerical value. Therefore, the model developed in this study can serve as a robust modeling tool for metallurgical processes, and the thermodynamic data predicted by this new model can be used to improve the metallurgical technology.

关键词： thermochemical model CaO-SiO 2 -Al 2 O 3 slag system thermodynamic properties molecule coexistence theory TG223 A

电针干预对慢性疲劳综合征大鼠海马组织蛋白质磷酸化表达的影响

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针刺研究 2024年第6期49卷 594-603页

作者：杨燕孙忠人李超然冯楚文王玉琳王德龙屈媛媛郭静石天宇孙闻孙维伯杨添淞黑龙江中医药大学哈尔滨150040 黑龙江中医药大学附属第二医院哈尔滨150001 浙江中医药大学附属第三医院杭州310005 黑龙江中医药大学附属第一医院哈尔滨150040 河北燕达医院河北廊坊065201 北京中医药大学北京100029 黑龙江神志医院哈尔滨150036 哈尔滨医科大学第一临床医学院哈尔滨150001 黑龙江省中医药信息学重点实验室哈尔滨150040

目的:观察电针对慢性疲劳综合征(CFS)大鼠行为学和海马组织蛋白磷酸化的影响,探讨电针治疗CFS的作用机制。方法:将雄性SD大鼠随机分为空白组、模型组和电针组,每组12只。采用多因素慢性复合应激法制备CFS模型。电针组大鼠给予电针“神庭... 详细信息

目的:观察电针对慢性疲劳综合征(CFS)大鼠行为学和海马组织蛋白磷酸化的影响,探讨电针治疗CFS的作用机制。方法:将雄性SD大鼠随机分为空白组、模型组和电针组,每组12只。采用多因素慢性复合应激法制备CFS模型。电针组大鼠给予电针“神庭”(透刺“百会”)和“大椎”治疗,每日1次,每次15 min,连续28 d。治疗结束后观察各组大鼠体质量、摄食量和饮水量,采用实验大鼠一般情况半定量评分观察表评价大鼠的疲劳程度,采用旷场实验及Morris水迷宫实验评价大鼠焦虑程度和学习记忆能力。取各组大鼠海马组织进行磷酸化Label-free定量蛋白质组学检测。结果:治疗结束后,与空白组比较,模型组大鼠体质量降低(P<0.01),摄食量减少(P<0.05),一般情况半定量评分升高(P<0.01),旷场实验总穿格次数和进入中央区次数均增多(P<0.01),Morris水迷宫实验逃避潜伏期延长(P<0.01)、穿越原平台次数减少(P<0.01)。与模型组比较,电针组大鼠一般情况半定量评分降低(P<0.01),旷场实验总穿格次数减少(P<0.05),Morris水迷宫实验逃避潜伏期缩短(P<0.01)、穿越原平台次数增加(P<0.01)。与空白组比较,模型组有297个差异表达肽段,对应255个蛋白,与模型组比较,电针组有245个差异表达肽段,对应198个蛋白,其中共有24个重合蛋白在电针治疗后表达回调。GO分析表明,电针干预的作用在生物学过程方面主要为对蛋白质聚合和细胞骨架组织的调节,在分子功能聚类上表现为对蛋白质聚合的调节,在细胞组分聚类方面表现为对突触功能的影响。KEGG分析结果显示,电针干预对胰岛素分泌、轴突导引、磷脂酰肌醇信号系统及赖氨酸生物合成等对中枢神经系统组织功能有重要作用的信号通路产生了影响。结论:电针可以改善CFS模型大鼠的疲劳状态,缓解焦虑情绪,提高学习记忆能力,其机制可能与调节海马组织蛋白磷酸化水平有关。

关键词：电针慢性疲劳综合征磷酸化蛋白质组学液相色谱-质谱海马

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列车通过分岔隧道的气动效应研究

Journal of Central South University 2024年第3期31卷 1017-1031页

作者：方丰彦刘堂红夏玉涛许彬王鑫然霍小帅高鸿瑞粱高鹏李文辉 Key Laboratory of Traffic Safety on Track of Ministry of Education School of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075China Joint International Research Laboratory of Key Technology for Rail Traffic Safety Central South UniversityChangsha 410075China National&Local Joint Engineering Research Centre of Safety Technology for Rail Vehicle Central South UniversityChangsha 410075China School of Rail Transportation Soochow UniversitySuzhou 215131China

长大铁路隧道受特殊地质条件影响可采用分岔隧道建造。然而,列车高速穿越这种复杂构型的隧道时所引起的空气动力学效应尚不清楚。为此,本文采用三维、可压缩、非定常的雷诺时均模型,模拟研究了高速列车从不同方向通过分岔隧道时引起的... 详细信息

长大铁路隧道受特殊地质条件影响可采用分岔隧道建造。然而,列车高速穿越这种复杂构型的隧道时所引起的空气动力学效应尚不清楚。为此,本文采用三维、可压缩、非定常的雷诺时均模型,模拟研究了高速列车从不同方向通过分岔隧道时引起的气动效应。研究内容主要包括入口隧道结构为单线隧道(STE)和双线隧道(DTE)两个运行环境下的车体表面和隧道壁面的压力波动、列车气动力和周围流场特征等。研究结果表明,相比STE场景,DTE场景下车体表面和单线隧道壁面的压力峰峰值更大,并且气动阻力能耗也更大,头车的平均阻力增大19.2%。然而,STE场景下列车的侧向力波动更剧烈,其峰值相比DTE场景增加26%。本文的研究发现可为特殊铁路隧道的设计和建造提供有价值的空气动力学参考。

关键词：高速列车分岔隧道瞬态压力波气动力

Effects of febuxostat on atrial remodeling in a rabbit model of atrial fibrillation induced by rapid atrial pacing

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Journal of Geriatric Cardiology 2019年第7期16卷 540-551页

作者： Yong-yan FAN feng XU Chao ZHU wen-kun CHENG Jian LI Zhao-Liang SHAN yang LI yu-Tang wang College of Medicine Nankai UniversityTianjinChina Department of Cardiology Chinese PLA General HospitalBeijingChina Department of Bone&Joint Shijingshan Teaching Hospital of Capital Medical UniversityBeijing Shijingshan HospitalBeijingChina Department of Heart Center Beijing Friendship HospitalCapital Medical UniversityBeijingChina Department of Geriatric Cardiology Chinese PLA General HospitalBeijingChina

Background Febuxostat,a novel nonpurine selective inhibitor of xanthine oxidase(XO),may be used in the prevention and management of atrial fibrillation(AF).The purpose of this study was to evaluate the effects of febuxostat on atrial remodeling in a rabbit model of AF induced by rapid atrial pacing(RAP)and the mechanisms by which it *** Twenty-four rabbits were randomly divided into four groups:sham-operated group(Group S),RAP group(Group P),RAP with 5 mg/kg per day febuxostat group(Group LFP),and RAP with 10 mg/kg per day febuxostat group(Group HFP).All rabbits except those in Group S were subjected to RAP at 600 beats/min for four *** effects of febuxostat on atrial electrical and structural remodeling,markers of inflammation and oxidative stress,and signaling pathways involved in the left atrium were *** Shortened atrial effective refractory period(AERP),increased AF inducibility,decreased mRNA levels of Cav1.2 and Kv4.3,and left atrial enlargement and dysfunction were observed in Group P,and these changes were suppressed in the groups treated with *** atrial fibrosis was observed in Group P,as were increased levels of TGF-β1,Collagen I,andα-SMA and decreased levels of Smad7 and *** with febuxostat attenuated these *** in inflammatory and oxidative stress markers induced by RAP were consistent with the protective effects of *** This study is the first to find that febuxostat can inhibit atrial electrical and structural remodeling of AF by suppressing XO and inhibiting the TGF-β1/Smad signaling pathway.

关键词： Atrial fibrillation Atrial remodeling Febuxostat Rapid atrial pacing Xanthine oxidase