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基于分支定界技术的分组密码新型积分区分器搜索

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密码学报（中英文） 2024年第4期11卷 861-877页

作者：曾凡洋田甜信息工程大学郑州450001

积分攻击是一种针对分组密码的重要攻击技术.传统上,积分区分器是在一组给定明文下的平衡比特,即零和积分区分器.然而,一些带密钥的区分器往往被忽略,实际上对积分攻击也有一定帮助.本文提出一种新型分组密码积分区分器,称为基于密钥的... 详细信息

积分攻击是一种针对分组密码的重要攻击技术.传统上,积分区分器是在一组给定明文下的平衡比特,即零和积分区分器.然而,一些带密钥的区分器往往被忽略,实际上对积分攻击也有一定帮助.本文提出一种新型分组密码积分区分器,称为基于密钥的积分区分器,以及关于该区分器的搜索技术.本文的主要想法是首先恢复某个输出比特关于轮子密钥的超多项式作为积分区分器,然后猜测最后几轮的部分轮子密钥,通过密钥调度算法来简化超多项式.如果超多项式关于密钥变量是平衡的,则可以恢复1比特轮子密钥信息,一般情况下,可以转换为1比特的主密钥信息.为了有效搜索基于密钥的积分区分器,本文提出一种结合可分性和分支定界的方法,并将其应用到simon和Simeck算法中.针对15轮simon32、18轮simon64和15轮Simeck32,分别恢复了12、8和9个密钥超多项式,并且利用其中一个超多项式,给出了一个25轮simon32的密钥恢复攻击.此外,利用新的搜索技术,给出了18轮simon64的两个新的平衡比特.据我们所知,这是第一次使用与密钥相关的积分区分器对分组密码实施密钥恢复攻击.

关键词：积分攻击可分性质分支定界 MILP

Enhanced tensile plasticity of a CuZr-based bulk metallic glass composite induced by ion irradiation

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Journal of Materials Science & Technology 2019年第10期35卷 2221-2226页

作者： Peng Xue simon Pauly Weimin Gan Songshan Jiang Hongbo fan Zhiliang Ning Yongjiang Huang Jianfei Sun State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China IFW Dresden Institute for Complex MaterialsHelmholtzstraβe 20D-01069 DresdenGermany German Engineering Materials Science Centre(GEMS)at Heinz Maier-Leibnitz Zentrum(MLZ) Helmholtz-Zentrum Geesthacht GmbHGarchingGermany Key Laboratory of Micro-systems and Microstructures Manufacturing(Harbin Institute of Technology) Ministry of EducationHarbinChina

N^+ ion irradiation is utilized to tune the structure and mechanical properties of a Cu48Zr47.2Al4Nb0.8 bulk metallic glass composite(BMGC). Ion irradiation increases the disorder near the surface, as probed by neutron diffraction, and, moreover, causes the phase transformation from B2Cu Zr to B19’ CuZr martensitic phase in the studied BMGC. The tensile plasticity of the BMGC is dramatically improved after ion irradiation, which results from multiple shear banding on the surface and the martensitic transformation of the B2 to B19’ Cu Zr martensitic phase. The experimental results are strongly corroborated by complementary molecular dynamic simulations.

关键词： Bulk metallic glass composite Ion irradiation Neutron diffraction Molecular dynamics simulation Mechanical properties

Spatial targeting evaluation of energy and environmental performance of waste-to-energy processing

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Frontiers of Chemical Science and Engineering 2018年第4期12卷 731-744页

作者： Petar S.Varbanov Timothy G.Walmsley Yee V.fan Jiri J.Klemes simon J.Perry Sustainable Process Integration Laboratory NETME CentreFaculty of Mechanical EngineeringBmo University of Technology61669 Bmo Czech Republic Centre for Process Integration School of Chemical Engineering and Analytical ScienceThe University of ManchesterManchester M I 3ALUK

Waste-to-energy supply chains are important potential contributors to minimising the environmental impacts of municipal solid waste by reducing the amounts of waste sent to landfill, as well as the fossil fuel consumption and environmental footprints. Accounting for the spatial and transport properties of the waste-to-energy supply chains is crucial for understanding the problem and improving the supply chain designs. The most significant challenge is the distributed nature of the waste generation and the household energy demands. The current work proposes concepts and a procedure for targeting the size of the municipal solid waste collection zone as the first step in the waste-to-energy supply chains synthesis. The formulated concepts and the provided case study reveal trends of reducing the net greenhouse gas savings and energy recovery by increasing the collection zone size. Population density has a positive correlation with the greenhouse gas saving and energy recovery performance. For smaller zone size the energy recovery from waste approaches and in some cases may surpass the energy spent on waste transportation. The energy recovery and greenhouse gas savings remain significant even for collection zones as large as 200 km(2). The obtained trends are discussed and key directions for future work are proposed.

关键词： waste-to-energy supply chain optimisation GHG savings energy recovery ratio

HEAT LOSSES FROM PIPES CONNECTED TO HOT WATER STORAGE TANKS

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HEAT LOSSES FROM PIPES CONNECTED TO HOT WATER STORAGE TANKS

Modulation of graft vascular inflow guided by flowmetry and manometry in liver transplantation

2007世界太阳能大会：太阳能与人类居住

作者： Elsa Andersen Jianhua fan simon Furbo Department of Civil Engineering Technical University of Denmark 2800 Kgs.Lyngby Denmark

＜正＞The heat loss from pipe connections at the top of hot water storage tanks with and without a heat trap is investigated theoretically and compared to similar experimental *** Fluid Dynamics（CFD）is used for the theoretical *** investigations show that the heat loss from an ideally insulated pipe connected to the top of a hot water tank is mainly due to a natural convection flow in the pipe,that the heat loss coefficient of pipes connected to the top of a hot water tank is high,and that a heat trap can reduce the heat loss coefficient ***,calculations show that the yearly thermal performance of solar domestic hot water systems is strongly reduced if the hot water tank has a thermal bridge located at the top of the tank.

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Hepatobiliary & Pancreatic Diseases International 2011年第6期10卷 649-656页

作者： See Ching Chan Chung Mau Lo Kenneth SH Chok William W Sharr Tan To Cheung simon HY Tsang Albert CY Chan Sheung Tat fan Department of Surgery The University of Hong Kong 102 Pokfulam RoadHong KongChina State Key Laboratory for Liver Research The University of Hong Kong 102 Pokfulam RoadHong KongChina

BACKGROUND:Survival of the partial graft after living donor liver transplantation owes much to its tremendous regenerative *** excellent venous outflow capacity,a graft within a wide range of graft-to-standard-liver-volume ratios can cope with portal hypertension that is common in liver transplant ***,when the ratio range is exceeded,modulation of graft vascular inflow becomes necessary for graft *** interplay between graft-to-standard-liver-volume ratio and portal pressure,in the presence of portosystemic shunt or otherwise,requires individualized modulation of graft portal and arterial *** of portal inflow by shunt ligation can be guided by transonic flowmetry,whereas muting of portal inflow by splenic artery ligation can be monitored by portal electronic ***:We describe four cases to illustrate the ***:One patient had hepatic artery thrombosis resulting from splenic artery steal syndrome which was the sequela of small-for-size *** splenic artery ligation and re-anastomosis of the hepatic artery successfully muted the portal inflow and boosted the hepatic arterial *** patient with portal vein thrombosis underwent *** inflow was boosted with ligation of portosystemic shunt,which is often present in these patients with portal *** coexistence of splenic aneurysm and splenorenal shunt required ligation of both in the third *** fourth patient,with portal pressure and flow monitoring,avoided ligation of a coronary vein which became a main portal inflow after portal ***:Management of graft inflow modulation guided selectively by transonic flowmetry or portal manometry was described.

关键词： graft inflow liver transplantation modulation

Using eye movements in the dot-probe paradigm to investigate attention bias in illness anxiety disorder

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World Journal of Psychiatry 2021年第3期11卷 73-86页

作者： Yan-Bo Zhang Peng-Chong Wang Yun Ma Xiang-Yun Yang fan-Qiang Meng simon A Broadley Jing Sun Zhan-Jiang Li The Department of Clinical Psychology and National Clinical Research Center for Mental Disorders and Beijing Key Laboratory of Mental Disorders Beijing An’Ding HospitalCapital Medical Universityand Center of SchizophreniaBeijing Institute for Brain DisordersBeijing 100089China Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijing 100089China Psychology Department Beijing Tongren HospitalCapital Medical UniversityBeijing 100089China Menzies Health Institute Queensland and School of Medicine Griffith UniversityGold Coast 4222QueenslandAustralia

BACKGROUND Illness anxiety disorder(IAD)is a common,distressing,and debilitating condition with the key feature being a persistent conviction of the possibility of having one or more serious or progressive physical *** eye movements are guided by visual-spatial attention,eye-tracking technology is a comparatively direct,continuous measure of attention direction and speed when stimuli are *** have tried to identify selective visual attention biases by tracking eye movements within dot-probe paradigms because dot-probe paradigm can distinguish these attentional biases more *** To examine the association between IAD and biased processing of illness-related *** A case-control study design was used to record eye movements of individuals with IAD and healthy controls while participants viewed a set of pictures from four categories(illness-related,socially threatening,positive,and neutral images).Biases in initial orienting were assessed from the location of the initial shift in gaze,and biases in the maintenance of attention were assessed from the duration of gaze that was initially fixated on the picture per image *** The eye movement of the participants in the IAD group was characterized by an avoidance bias in initial orienting to illness-related *** was no evidence of individuals with IAD spending significantly more time viewing illness-related images compared with other *** with IAD had an attention bias at the early stage and overall attentional *** addition,this study found that patients with significant anxiety symptoms showed attention bias in the late stages of attention *** Illness-related information processing biases appear to be a robust feature of IAD and may have an important role in explaining the etiology and maintenance of the disorder.

关键词： Attention bias Selective attention Eye tracking Dot-probe Illness anxiety disorder Disengagement

The impact of family history of hepatocellular carcinoma on its patients' survival

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Hepatobiliary & Pancreatic Diseases International 2012年第2期11卷 160-164页

作者： Wing Chiu Dai Sheung Tat fan Tan To Cheung Kenneth SH Chok Albert CY Chan simon HY Tsang Ronnie TP Poon Chung Mau Lo Department of Surgery The University of Hong Kong 102 Pokfulam Road Hong Kong China State Key Laboratory for Liver Research The University of Hong Kong 102 Pokfulam Road Hong Kong China

BACKGROUND:Family history of hepatocellular carcinoma(HCC) has been identified as a risk factor for the development of the *** aim of this study is to evaluate the impact of such a history on HCC patients’ ***:Data of all HCC patients(n=4532) managed at our center from 1989 to 2008 were prospectively *** patients were quizzed on their various characteristics including family HCC ***:Totally 475(10.48%) patients had a family history of *** presented the disease at a significantly earlier age(median 53 vs 59 years,P<0.0001) and at an earlier stage(the United Network for Organ Sharing staging system).They had significantly better liver function in terms of ChildPugh classification and serum albumin and bilirubin *** more of them presented the disease without symptoms(44.0% vs 29.4%,P<0.0001).They also had significantly better overall survival under these specifications:patients in the whole study cohort,patients who had minor hepatectomy,patients with stage I disease,patients with stage II disease,and patients with stage III ***:Contrary to what is generally believed,we found in this study cohort that patients with a family history of HCC had better overall survival than those without such a *** believe this was in part due to earlier diagnosis of the disease and better liver function in this group of ***,the effects of genetic factors on the risk of HCC cannot be overlooked and are yet to be identified.

关键词： hepatocellular carcinoma family history resection survival risk factor

CD8+T cell metabolic flexibility elicited by CD28-ARS2 axisdriven alternative splicing of PKM supports antitumor immunity

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Cellular & Molecular Immunology 2024年第3期21卷 260-274页

作者： G.Aaron Holling Colin A.Chavel Anand P.Sharda Mackenzie M.Lieberman Caitlin M.James Shivana M.Lightman Jason H.Tong Guanxi Qiao Tiffany R.Emmons Thejaswini Giridharan Shengqi Hou Andrew M.Intlekofer Richard M.Higashi Teresa W.M.fan Andrew N.Lane Kevin H.Eng Brahm H.Segal Elizabeth A.Repasky Kelvin P.Lee Scott H.Olejniczak Department of Immunology Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Department of Medicine Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Human Oncology and Pathogenesis Program Memorial Sloan Kettering Cancer CenterNew YorkNY 10065USA Center for Environmental Systems Biochemistry Department of Toxicology and Cancer Biology and Markey Cancer CenterLexingtonKY 40536USA Department of Cancer Genetics and Genomics Roswell Park Comprehensive Cancer CenterBuffaloNY 14263USA Present address:University of Colorado Boulder BoulderCO 80309USA Present address:Dana Farber Cancer Institute BostonMA 02215USA Present address:Massachusetts Institute of Technology BostonMA 02139USA Present address:Melvin and Bren simon Comprehensive Cancer Center Indiana University School of MedicineIndianapolisIN 46202USA

Metabolic flexibility has emerged as a critical determinant of CD8+T-cell antitumor activity,yet the mechanisms driving the metabolic flexibility of T cells have not been *** this study,we investigated the influence of the nuclear cap-binding complex(CBC)adaptor protein ARS2 on mature T *** doing so,we discovered a novel signaling axis that endows activated CD8+T cells with flexibility of glucose ***2 upregulation driven by CD28 signaling reinforced splicing factor recruitment to pre-mRNAs and affected approximately one-third of T-cell activation-induced alternative splicing *** these effects,the CD28-ARS2 axis suppressed the expression of the M1 isoform of pyruvate kinase in favor of PKM2,a key determinant of CD8+T-cell glucose utilization,interferon gamma production,and antitumor effector ***,PKM alternative splicing occurred independently of CD28-driven PI3K pathway activation,revealing a novel means by which costimulation reprograms glucose metabolism in CD8+T cells.

关键词： Immunometabolism mRNA splicing CD8 T cells ARS2 PKM2

Pancreaticoduodenectomy with vascular reconstruction for adenocarcinoma of the pancreas with borderline resectability

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World Journal of Gastroenterology 2014年第46期20卷 17448-17455页

作者： Tan To Cheung Ronnie TP Poon Kenneth SH Chok Albert CY Chan simon HY Tsang Wing Chiu Dai See Ching Chan Sheung Tat fan Chung Mau Lo Department of Surgery Queen Mary HospitalUniversity of Hong Kong

AIM: To analyze whether pancreaticoduodenectomy with simultaneous resection of tumor-involved vessels is a safe approach with acceptable patient survival.

关键词： Adjuvant therapy Head of pancreas Liver transplant Morbidity Mortality Portal vein resection Survival analysis Whipple operation