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The differential fault analysis on block cipher FeW

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Cybersecurity 2023年第2期6卷 62-74页

作者： Haiyan Xiao Lifang Wang Jinyong chang School of Computer Science Northwestern Polytechnical UniversityXiAn 710055People's Republic of China Engineering University of PAP XiAn 710055People's Republic of China School of Information and Control Engineering XiAn University of Architecture and TechnologyXi'An 710055People's Republic of China State Key Laboratory of Information Security(SKLOIS) Institute of Information EngineeringChinese Academy of SciencesBeijing 100089People's Republic of China

Feather weight(FeW)cipher is a lightweight block cipher proposed by Kumar et *** 2019,which takes 64 bits plaintext as input and produces 64 bits *** Kumar et ***,FeW is a software oriented design with the aim of achieving high efficiency in software based *** seems that FeW is immune to many cryptographic attacks,like linear,impossible differential,differential and zero correlation ***,in recent work,Xie et *** the security of *** precisely,they proved that under the differential fault analysis(DFA)on the encryption states,an attacker can completely recover the master secret *** this paper,we revisit the block cipher FeW and consider the DFA on its key schedule algorithm,which is rather popular cryptanalysis for kinds of block *** particular,by respectively injected faults into the 30th and 29th round subkeys,one can recover about 55/80~69%bits of master *** the brute force searching remaining bits,one can obtain the full master secret *** simulations and experiment results show that our analysis is practical.

关键词： Differential fault analysis Block cipher FeW Side channel attack

Reactions of Rare-Earth Metal Based Lewis Pairs with Azides

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Chinese Journal of Chemistry 2020年第6期38卷 559-564页

作者： Yifan Dong Kejian chang Xin Xu Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China

The reactivity of homoleptic rare-earth metal aryloxide based Lewis pairs toward organic azide substrates has been investigated *** of RE(OAr)3(RE=La,Sm,X and Sc,Ar=2,6-'Bu2-C6H3),PEt3 and Me3SiN3 in 2:1:1 molar ratio resulted in formation of separated ion pair complexes[Me3Si-PEt3]^+[(ArO)3RE-N=N=N-RE(OAr)3]^-under mild *** of phosphine with the nitrogen-containing Lewis base l,4-diazabicyclo[2.2.2]octane(DABCO)produced analogous rare-earth azide complexes with[Me3Si-DABCO]+*** contrast,reaction of the La(OAr)3/PEt3 Lewis pair with 1-adamantyl azide(AdN3)afforded the typical frustrated Lewis pair-type 1,1-addition product.A tetrahydrofuran ring-opening reaction was also observed for the resulting rare-earth azide complex with the[Me3Si-PEt3]+cation,with cleavage of the C—0 bond by Si/P cooperation.

关键词： azide rare complexes

Science news release and its benefi ts to your research

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World Journal of Gastroenterology 2007年第45期13卷 6120-6121页

作者： You-De chang World Journal of Gastroenterology The WJGPress PO Box 2345 Beijing 100023 China

News release to the latest science f indings is benef icial to both researchers and their served institutions as well as the public. It will help to set a bridge of communication between researchers, the public and media, and publishers, making the latest research findings well known to the public. World Journal of Gastroenterology has currently freely opened the News Release Service System (WJG-NRSS) for original articles with potential signifi cance and novelty for news release to mass media to broaden the f indings to the public.

关键词： Gastroenterology

Synthesis of C-fused Penems By Br-or Cl-Promoted S-Heterocyclization

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Chemical Research in Chinese Universities 2002年第1期18卷 93-94页

作者： SHI Hong-chang Department of Chemistry Tsinghua UniversityBeijing 100084P.R.China

In the past several years, much research work has been done for the synthesis of C-fused bicyclo-β-lactam compounds and a concise "Double Annulation" procedure has been developed. The β-lactam ring is formed by the classical Staudinger reaction between α-(alkylthio) acyl chloride and an equivalent a, β-unsaturated imine. The sulfur ring is subsequently fused onto the β-lactam unit by means of a halogen-promoted heterocyclization process. This procedure was applied to the synthesis of penem as illustrated in Fig. 1. The obtained X-penems are a kind of important intermediates for synthesizing a series of β-lactam compounds, for example, they are carboxylated by coupling reactions on the C atom which is linked to halagen, forming penem. An important purpose in the research field is to probe into new β-lactam medicines.

关键词： β -Lactam S-heterocyclization Br-penem Cl-penem

Dosimetric risk factors for radiation esophagitis in patients with breast cancer following regional nodal radiation

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World Journal of Clinical Cases 2024年第17期12卷 2995-3003页

作者： Mei-Chen Ji Zhi-Jia Li Ke Li Yun-Xiao Wang Bo Yang Lin-Lin Lv Ying Su Zhi-Wei Zhang Zhong-Chao Huo Qing Qi Yong-chang Lu Zhi-Qiang Cui Yan-Bao Liu Oncology Center The Affiliated Hospital of Hebei University of EngineeringHandan 056002Hebei ProvinceChina General Surgery Department Handan First HospitalHandan 056002Hebei ProvinceChina Department of Breast Surgery The Affiliated Hospital of Hebei University of EngineeringHandan 056002Hebei ProvinceChina School of Clinical Medicine Hebei University of EngineeringHandan 056002Hebei ProvinceChina

BACKGROUND Radiation esophagitis(RE)is one of the most common clinical symptoms of regional lymph node radiotherapy for breast ***,there are fewer studies focusing on RE caused by hypofractionated radiotherapy(HFRT).AIM To analyze the clinical and dosimetric factors that contribute to the development of RE in patients with breast cancer treated with HFRT of regional lymph *** Between January and December 2022,we retrospectively analysed 64 patients with breast cancer who met our inclusion criteria underwent regional nodal intensity-modulated radiotherapy at a radiotherapy dose of 43.5 Gy/*** Of the 64 patients in this study,24(37.5%)did not develop RE,29(45.3%)developed grade 1 RE(G1RE),11(17.2%)developed grade 2 RE(G2RE),and none developed grade 3 RE or *** univariable logistic regression analysis found G2RE to be significantly correlated with the maximum dose,mean dose,relative volume 20-40,and absolute volume(AV)*** stepwise linear regression analyses found AV30 and AV35 to be significantly associated with G2RE(P<0.001).The optimal threshold for AV30 was 2.39 mL[area under the curve(AUC):0.996;sensitivity:90.9%;specificity:91.1%].The optimal threshold for AV35 was 0.71 mL(AUC:0.932;sensitivity:90.9%;specificity:83.9%).CONCLUSION AV30 and AV35 were significantly associated with *** thresholds for AV30 and AV35 should be limited to 2.39 mL and 0.71 mL,respectively.

关键词： Breast cancer Dosimetric parameters Radiation esophagitis Esophagitis Hypofractionated radiotherapy

Population Spatial Distribution Based on Luojia 1-01 Nighttime Light Image:A Case Study of Beijing

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Chinese Geographical Science 2021年第6期31卷 966-978页

作者： SUN Lu WANG Jia chang Shuping Institute of GIS RS&GPSBeijing Forestry UniversityBeijing100083China Beijing Key Laboratory of Precise Forestry Beijing Forestry UniversityBeijing100083China

With the continuous development of urbanization in China,the country’s growing population brings great challenges to urban *** mastering the refined population spatial distribution in administrative units,the quantity and agglomeration of population distribution can be estimated and *** will provide a basis for a more rational urban *** paper takes Beijing as the research area and uses a new Luojia1-01 nighttime light image with high resolution,land use type data,Points of Interest(POI)data,and other data to construct the population spatial index system,establishing the index weight based on the principal component *** comprehensive weight value of population distribution in the study area was then used to calculate the street population distribution of Beijing in *** the population spatial distribution was visualize using GIS *** accuracy assessments by comparing the result with the WorldPop data,the accuracy has reached *** proposed method was validated as a qualified method to generate population spatial *** contrast of local areas,Luojia 1-01 data is more suitable for population distribution estimation than the NPP/VIIRS(Net Primary Productivity/Visible infrared Imaging Radiometer)nighttime light *** geospatial big data and mathematical models can be combined to create more accurate population maps in the future.

关键词： Luojia1-01 nighttime light image principal component analysis points of interest landuse type data population spatial distribution

Effects of areca nut consumption on cell differentiation of osteoblasts, myoblasts, and fibroblasts

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BIOCELL 2023年第2期47卷 283-287页

作者： YUNG-FU chang Department of Biomedical Science and Environmental Biology Kaohsiung Medical UniversityKaohsiung807Taiwan Department of Medical Research Kaohsiung Medical University HospitalKaohsiung807Taiwan Translational Research Center of Neuromuscular Diseases Kaohsiung Medical University HospitalKaohsiung807Taiwan

Areca nut is used worldwide as a hallucinogenic addicting drug along the tropical ***,a toxic compound,is the most important alkaloid in areca *** adverse effects of oral uptake and chewing of areca nut are well *** example,the possibility of cancer caused by chewing areca nuts is widely *** areca nut has other adverse effects on other organs,including abnormal cell differentiation,oral cancer,and several other *** use of areca nut is also associated with low *** musculature is the largest organ in the body and is attached to the *** embryo development,the differentiation of bone and muscle cells is *** this article,we reviewed the effects of areca nut and arecoline on embryonic cell differentiation,particularly osteoblasts,myoblasts,and fibroblasts.

关键词： Areca nut Cell differentiation Osteoblast Myoblast Fibroblast

Gas-solid flow in a high-density circulating fluidized bed riser with Geldart group B particles

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Particuology 2016年第6期14卷 103-109页

作者： Jian chang KaiZhang Wenqi Zhu Yongping Yang Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation North China Electn'c Power University Belting 102206 China

We carried out experiments to explore and characterize the gas-solid flow dynamics of Geldart group B particles in a dense circulating fluidized bed riser. By reducing the pressure drop across the solid control valve and increasing the solid inventory in the storage tank, a high solid circulation rate and a solid holdup above 0.075 throughout the riser were simultaneously achieved. At a solid-to-gas mass flux ratio of approximately 105, flow transitioned from fast fluidization to a dense suspension upflow. In the axial direction of the riser, solid holdup had an exponential profile, increasing with increasing solid circulation rate and Jot decreasing superficial gas velocity. From the riser＇s center to its wall, the solid holdup increased markedly, exhibiting a steep parabolic profile. Increasing the solid circulation rate increased the radial non-uniformity of the solid concentration, while increasing the superficial gas velocity had the opposite effect, In our dense circulating fluidized bed riser, Geldart group B particles had similar slip characteristics to Geldart group A particles,

关键词： Circulating fluidized bed riser Dense gas-solid flow High density High flux Hydrodynamics Geldart group B particle

A THREE-PARAMETER FAULT-DETECTION SOFTWARE RELIABILITY MODEL WITH THE UNCERTAINTY OF OPERATING ENVIRONMENTS

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Journal of Systems Science and Systems Engineering 2017年第1期26卷 121-132页

作者： Kwang Yoon Song In Hong chang Hoang Pham Department of Computer Science and Statistics Chosun University Gwangju 62022 Korea Department of Industrial and Systems Engineering Rutgers University NJ 08855-8018 USA

As requirements for system quality have increased, the need for high system reliability is also increasing. Soflnvare systems are extremely important, in terms of enhanced reliability and stability, for providing high quality services to customers. However, because of the complexity of software systems, soft-ware development can be time-consuming and expensive. Many statistical models have been developed in the past years to estimate soflnvare reliability. In this paper, we propose a new three-parameter fault-detection software reliability model with the uncertainty of operating environments. The explicit mean value function solution for the proposed model is presented. Examples are presented to illustrate the goodness-of-fit of the proposed model and several existing non-homogeneous Poisson process （NHPP） models based on three sets of failure data collected from software applications. The results show that the proposed model fits significantly better than other existing NHPP models based on three criteria such as mean squared error （MSE）, predictive ratio risk （PRR）, and predictive power （PP）.

关键词： Nonhomogeneous Poisson process ratio risk predictive power fault detection software reliability mean squared error predictive