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Journal of Materials Science & technology 2023年第35期166卷 113-122页

作者： Z.G.tai G.t.Sun X.H.Zhang X.B.yang t.Wang Z.y.Fang Q.ye L.C.jia H.Q.Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

to suppress the inner charge recombination and inject vast electrons,Cdte nanocrystals are embedded into ultrathin ZnIn_(2)S_(4) nanosheets to construct ZnIn_(2)S_(4)/Cdte heterostructures,where the nanocrystals are generated by a laser irradiation *** optimal ZnIn_(2)S_(4)/Cdte heterojunction exhibits an excellent catalytic activity of 24.3 mmol/h/g,which is relatively high among the ZnIn_(2)S_(4)-based photocatalysts with-out noble *** enhancement is ascribed to a win-win mechanism of nanoscale heterojunctions and sulfur *** strong electron coupling effect,which is verified by density functional the-ory(DFt)calculations,impels the photo-generated electrons transfer from Cdte to ZnIn_(2)S_(4),boosting the charge ***,the sulfur vacancies existing in ZnIn_(2)S_(4) can capture photoelectrons and act as active sites,facilitating the H_(2) generation *** addition,the ZnIn_(2)S_(4) base and the ZnIn_(2)S_(4)/Cdte heterojunction also possess an evident photothermal effect and renewable cycle phenomena,enhancing the photocatalytic *** research provides new insights into the regulation of charge transfer through embedding nanocrystals.

关键词： Photocatalysis Hydrogen evolution Laser irradiation Heterostructure Sulfur vacancies

A PRACtICAL PARALLEL DIFFERENCE SCHEME FOR PARABOLIC EQUAtIONS

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Journal of Computational Mathematics 2004年第1期22卷 55-60页

作者： jia-quanGao RDCPS InstituteofSoftwareChineseAcademyofSciencesP.O.Box8718Beijing100080China

A practical parallel difference scheme for parabolic equations is constructed as follows:to decompose the domain Ω into some overlapping subdomains, take flux of the last time layer as Neumann boundary conditions for the time layer on inner boundary points of subdomains, solve it with the fully implicit scheme on each subdomain, then take correspondent values of its neighbor subdomains as its values for inner boundary points of each subdomain and mean of its neighbor subdomain and itself at overlapping *** scheme is unconditionally convergent. though its truncation error is O(t + h), the convergent order for the solution can be improved to O(t + h^2).

关键词： Parallel difference scheme Parabolic equation Segment Explicit-implicit

A New Feistel-type White-Box Encryption Scheme

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Journal of Computer Science & technology 2017年第2期32卷 386-395页

作者： ting-ting Lin Xue-jia Lai Wei-jia Xue yin jia Cryptography and Information Security Laboratory Department of Computer Science Shanghai Jiao Tong University Shanghai 200240 China Irdeto Canada Ottawa Ontario K2K3G5 Canada

the white-box attack is a new attack context in which it is assumed that cryptographic software is implemented on an un-trusted platform and all the implementation details are controlled by the attackers. So far, almost all white-box solutions have been broken. In this study, we propose a white-box encryption scheme that is not a variant of obfuscating existing ciphers but a completely new solution. the new scheme is based on the unbalanced Feistel network as well as the ASASASA （where ＂A＂ means affine, and ＂S＂ means substitution） structure. It has an optional input block size and is suitable for saving space compared with other solutions because the space requirement grows slowly （linearly） with the growth of block size. Moreover, our scheme not only has huge white-box diversity and white-box ambiguity but also has a particular construction to bypass public white-box cryptanalysis techniques, including attacks aimed at white-box variants of existing ciphers and attacks specific to the ASASASA structure. More precisely, we present a definition of white-box security with regard to equivalent key, and prove that our scheme satisfies such security requirement.

关键词： white-box equivalent key Feistel network cryptography ASASASA

GRAIN GROWING DyNAMICS OF MgO-CaO COMPOSItE CERAMICS

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Acta Metallurgica Sinica(English Letters) 2000年第6期13卷 1155-1158页

作者： t.M. jia and G. y. An (Harbin University of technology, Harbin 150001, China) S.X. Che (Liaoning Institute of technology, Jinzhou 121000, China) Harbin Univ. of technol. Harbin 150001 China

the grain growing dynamics including the growing process, the growing exponent and the growing activation energy is obtained for the MgO-CaO composite ceramics with the additions of Fe2O3, CeO2 and/or ZrO2 as fluxes by measuring the size of grains with the method of Straight Line Across. the results show that all of the additions, in which Fe2O3 is the strongest, have notable effects on the grain growing dynamics by reducing the growing activation energy and promoting the grain growing. the research gives a good reference for the additions of fluxes to the matrix of ceramic filter.

关键词： MgO-CaO composite ceramics growing exponent activation energy

Dementia studies in Chinese populations

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Neuroscience Bulletin 2014年第2期30卷 207-216页

作者： Jin-Jing Pei Maria Stella t. Giron jianping jia Hui-Xin Wang Department of Neurology Xuan Wu Hospital Capital Medical University Beijing 100053 China KI-Alzheimer's Disease Research Center Department of Neurobiology Care Sciences and Society Karolinska InstitutetNovum 141 86 Stockholm Sweden Aging Research Center Department of Neurobiology Care Sciences and Society Karolinska Institutet and StockholmUniversity G~vlegatan 16 113 30 Stockholm Sweden

Variations in the prevalence of dementia in different ethnic groups have been reported worldwide, and a number of reviews have provided a picture of epidemiological studies in dementia research. However, little is known about epidemiological studies in Chinese populations. In this review, we searched PubMed and the Web of Science for original research articles published in English up to July 2013 on the prevalence, incidence, risk factors, and prognosis of dementia in Chinese populations worldwide. Except for the prevalence, we included only population-based follow-up studies. We identified 25 studies in elderly Chinese residents in China's Mainland, Hong Kong, taiwan, and Singapore, and found a higher prevalence of dementia in China's Mainland than in the other locations, which may be due to that the studies from China's Mainland are more recent than those from other locations. A notable increase in incidence was observed when dementia cases were diagnosed using 10/66 diagnostic criteria compared to other criteria. Studies on risk factors for dementia were limited and mostly from China's Mainland. Age, gender, education, smoking, and alcohol consumption were related to the risk of dementia in Chinese populations. Only two prognostic studies were identified, and age, gender, and residential area were related to the prognosis of dementia. In conclusion, the prevalence, incidence, and risk factors for dementia found in Chinese populations were comparable to other ethnic groups, but no conclusive results on prognosis were found. the differences in prevalence and incidence were influenced by the diagnostic criteria and the time of study. Longitudinal population-based studies on the incidence, risk factors, and prognosis of dementia in Chinese populations are required.

关键词： dementia epidemiology risk factors prognosis prevalence incidence

the Module-Phase Synchronization of Complex-Valued Neural Networks with time-Varying Delay and Stochastic Perturbations

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Journal of Systems Science & Complexity 2021年第6期34卷 2139-2154页

作者： NIAN Fuzhong LI jia School of Computer Sz Communication Lanzhou University of TechnologyLanzhou 730050China

the problem of exponential module-phase synchronization of complex-valued neural networks(CVNNs)with time-varying delay and stochastic perturbations was *** model of CVNNs with time-varying delay and stochastic perturbations was *** error system was deduced and the module-phase synchronization was *** on the principle of Lyapunov stability theory,the appropriate controller was designed to control the ***,the effectiveness and reliability of the method were verified by the numerical simulations.

关键词： Complex-valued neural networks exponential module-phase synchronization Lyapunov function time-varying delay

Monitoring the Expression of Maize Genes in Developing Kernels under Droug ht Stress usingOligo-microarray

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Journal of Integrative Plant Biology 2010年第12期52卷 1059-1074页

作者： Meng Luo jia Liu R. Dewey Lee Brian t. Scully Baozhu Guo the University of Georgia Department of Crop and Soil Sciences Tifton GA 31793 USA J. Craig Venter Institute Rockville MD 20850 USA US D-epartment of Agriculture Agricultural Research Service Crop Protection and Management Research Unit Tifton GA 31793 USA

Preharvest aflatoxin contamination of grain grown on the US southeastern Coast Plain is provoked and aggravated by abiotic stress. the primary abiotic stress is drought along with high temperatures. the objectives of the present study were to monitor gene expression in developing kernels in response to drought stress and to identify drought-responsive genes for possible use in germplasm assessment. the maize breeding line tex6 was used, and gene expression profiles were analyzed in developing kernels under drought stress verses well-watered conditions at the stages of 25, 30, 35, 40, 45 d after pollination （DAP） using the 70 mer maize oligo-arrays. A total of 9 573 positive array spots were detected with unique gene IDs, and 7 988 were common in both stressed and well-watered samples. Expression patterns of some genes in several stress response-associated pathways, including abscisic acid, jasmonic acid and phenylalanine ammonia-lyase, were examined, and these specific genes were responsive to drought stress positively. Real-time quantitative polymerase chain reaction validated microarray expression data. the comparison between tex6 and B73 revealed that there were significant differences in specific gene expression, patterns and levels. Several defense-related genes had been downregulated, even though some defense-related or drought responsive genes were upregulated at the later stages.

关键词： Drought stress Gene expression Drought Genes Stress Uses Water Acids Breeds (animals) Maize

Physical properties of γ Doradus pulsating stars and their relationship with long-period δ Scuti variables

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Research in Astronomy and Astrophysics 2019年第1期19卷 1-20页

作者： Sheng-Bang Qian Lin-jia Li jia-jia He jia Zhang Li-ying Zhu Zhong-tao Han yunnan Observatories Chinese Academy of Sciences Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Center for Astronomical Mega-Science Chinese Academy of Sciences University of Chinese Academy of Sciences

We present LAMOSt data on 168 γ Doradus(γ Dor) pulsating stars including stellar atmospheric parameters of 137 variables and spectral types for all of the samples. the distributions of period(P), temperature(t), gravitational acceleration(log(g)) and metallicity [Fe/H] are shown. It is found that most γ Dor variables are main-sequence stars with early F spectral types and temperatures from 6880 K to7280 K. they are slightly more metal poor than the Sun with a metallicity range from-0.4 to 0. On the H-R and log g-t diagrams, both the γ Dor and δ Scuti(δ Sct) stars occupy in the same region and some are beyond the borders predicted by current stellar pulsation theories. It is discovered that the physical properties of γ Dor stars are similar to those of long-period δ Sct(P > 0.3 d) stars. the stellar atmospheric parameters are all correlated with the pulsation period for short-period δ Sct variables(P t there are no such relations for γ Dor or long-period δ Sct stars. these results reveal that γ Dor and long-period δ Sct are the same group of pulsating stars and they are different from short-period δ Sct variables. Meanwhile, 33γ Dor stars are identified as candidates of binary or multiple systems.

关键词： stars:fundamental parameters stars:oscillations stars:binaries:spectroscopic stars:variables:other

AN AFFINE SCALING INtERIOR ALGORItHM VIA CONJUGAtE GRADIENt PAtH FOR SOLVING BOUND-CONStRAINED NONLINEAR SyStEMS

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Journal of Computational Mathematics 2008年第4期26卷 578-597页

作者： Chunxia jia Detong Zhu Mathematics and Sciences College Shanghai Normal University Shanghai 200234 China Business College Shanghai Normal University Shanghai 200234 China

In this paper we propose an affine scaling interior algorithm via conjugate gradient path for solving nonlinear equality systems subject to bounds on variables. By employing the affine scaling conjugate gradient path search strategy, we obtain an iterative direction by solving the linearize model. By using the line search technique, we will find an acceptable trial step length along this direction which is strictly feasible and makes the objective func- tion nonmonotonically decreasing. the global convergence and fast local convergence rate of the proposed algorithm are established under some reasonable conditions. Furthermore, the numerical results of the proposed algorithm indicate to be effective.

关键词： Conjugate gradient path Interior points Affine scaling.