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Preparation of NiFe binary alloy nanocrystals for nonvolatile memory applications

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Science China(Technological Sciences) 2010年第9期53卷 2320-2322页

作者： WANG Li,SUN HongFang,ZHOU HuiHua & ZHU Jing beijing national center for{3. microscopy Laboratory,Department of Materials Science and Engineering,tsinghua university,beijing 100084,China beijing national center for{3. microscopy Laboratory Department of Materials Science and Engineering Tsinghua University Beijing China

In this work,an idea which applies binary alloy nanocrystal floating gate to nonvolatile memory application was *** relationship between binary alloy’s work function and its composition was discussed theoretically.A nanocrystal floating gate structure with NiFe nanocrystals embedded in SiO2 dielectric layers was fabricated by magnetron *** micro-structure and composition deviation of the prepared NiFe nanocrystals were also investigated by TEM and EDS.

关键词： nanocrystal nonvolatile memory work function magnetron sputtering

Anomalous magnetotransport in LaMn_(1-x)Te_xO_3

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Science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 987-992页

作者： TAN GuoTai1,2, CHEN ZhengHao3.& ZHANG XiaoZhong4,5 1 Key Laboratory of Beam Technology & Materials Modification of the Ministry of Education, Institute of Low Energy Nuclear Physics, beijing Normal university, beijing 100875, China 2 beijing Radiation center, beijing 100875, China 3.Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, beijing 100080, China 4 Key Laboratory of Advanced Materials of the Ministry of Education, Department of Materials Science and Engineering, tsinghua university, beijing 100084, China 5 beijing national center for electron microscopy, tsinghua university, beijing 100084, China Key Laboratory of Beam Technology & Materials Modification of the Ministry of Education Institute of Low Energy Nuclear Physics Beijing Normal University Beijing China beijing Radiation center Beijing China Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing China Key Laboratory of Advanced Materials of the Ministry of Education Department of Materials Science and Engineering Tsinghua University Beijing China beijing national center for{3. microscopy Tsinghua University Beijing China

The LaMn1-xTexO3.δ (x=0.1, 0.2, 0.3. were synthesized using solid-state reaction method for the first time. X-ray photoemission spectrum (XPS) shows that in the samples the Te ions have a valence of Te4+, and Mn3. ions are partly converted into Mn2+ and Mn4+ due to the excess oxygen and Te doping. The magnetotransport associated with Mn2+, Mn3. and Mn4+ was investigated. The experimental results show that the samples are insulator at 0 T when the amount of Mn3. is much larger or less than the sum of Mn2+ and Mn4+; by contrast, the samples display metal to insulator transition with increasing temperature when the amount of Mn3. is close to the sum of Mn2+ and Mn4+. These anomalous magnetotransport behaviors were analyzed in the frame of the double-exchange (DE) mechanism.

关键词： colossal magnetoresistance La-Te-Mn-O magnetotransport

RRM:An incentive reputation model for promoting good behaviors in distributed systems

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Science in China(Series F) 2008年第11期51卷 1871-1882页

作者： ZHANG Hong1,2,DUAN HaiXin1,3.& LIU Wu1,3.1 tsinghua national Laboratory for Information Science and Technology,tsinghua{3.,beijing 100084,China 2 Department of Computer Science and Technology,tsinghua{3.,beijing 100084,China 3.Network Research center,tsinghua{3.,beijing 100084,China tsinghua national Laboratory for Information Science and Technology Tsinghua University Beijing China Department of Computer Science and Technology Tsinghua University Beijing China Network Research center Tsinghua University Beijing China

Reputation systems represent soft security mechanisms that complement traditional information security mechanisms. They are now widely used in online e-commerce markets and communities in order to stimulate good behaviors as well as to restrain adverse behaviors. This paper analyzes the limitations of the conversational reputation models and proposes an incentive reputation model called the resilient reputation model （RRM） for the distributed reputation systems. The objective of this reputation model is not only to encourage the users to provide good services and, therefore, to maximize the probability of good transaction outcomes, but also to punish those adverse users who are trying to manipulate the application systems. The simulation results indicate that the proposed reputation model （RRM） could effectively resist against the common adverse behaviors, while protecting the profits of sincere users from being blemished by those adversaries.

关键词： reputation model distributed system trust soft security

Theoretical research progress in new-generation Internet architecture

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Science in China(Series F) 2008年第11期51卷 1634-1660页

作者： WU JianPing1,2,3.LIU Ying2,3.& WU Qian2,3.1 Department of Computer Science,tsinghua university,beijing{3.,China 2 Network Research center,tsinghua university,beijing{3.,China 3.tsinghua national Laboratory for Information Science and Technology(TNList) ,beijing{3.,China Department of Computer Science Tsinghua University Beijing China Network Research center Tsinghua University Beijing China tsinghua national Laboratory for Information Science and Technology (TNList) Beijing China

Internet has become the most important information infrastructure supporting modern socio-economic development, social progress and technological Innovation. Invented 3. years ago, today Internet is facing increasingly severe technical challenges. This paper introduces the progress of the major international newgeneration Internet research plans; analyzes its basic characteristics and the principal contradictions during the development; detsiledly introduces the research carried out by 973.Project ＂Research of Future Internet Architecture＂ on the key scientific issues of new-generation Internet architecture and its latest research results; and looks to the future of the research-focus faced with the new situations of the basic research of new-generation Internet architecture as well as the new demands of innovative applications on Internet architecture.

关键词： new-generation Internet network architecture multi-dimension scalability

A formal method to real-time protocol interoperability testing

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Science in China(Series F) 2008年第11期51卷 1723-1744页

作者： WANG ZhiLiang1,3.YIN Xia2,3.& JING ChuanMing2,3.1 Network Research center,tsinghua university,{3. 100084,China 2 Department of Computer Science and Technology,tsinghua university,{3. 100084,China 3.tsinghua national Laboratory for Information Science and Technology(TNList) ,{3. 100084,China Network Research center Tsinghua University Beijing China tsinghua national Laboratory for Information Science and Technology (TNList) Beijing China Department of Computer Science and Technology Tsinghua University Beijing China

Interoperability testing is an important technique to ensure the quality of implementations of network communication protocol. In the next generation Internet protocol, real-time applications should be supported effectively. However, time constraints were not considered in the related studies of protocol interoperability testing, so existing interoperability testing methods are difficult to be applied in real-time protocol interoperability testing. In this paper, a formal method to real-time protocol interoperability testing is proposed. Firstly, a formal model CMpTIOA （communicating multi-port timed input output automata） is defined to specify the system under test （SUT） in real-time protocol interoperability testing; based on this model, timed interoperability relation is then defined. In order to check this relation, a test generation method is presented to generate a parameterized test behavior tree from SUT model; a mechanism of executability pre-determination is also integrated in the test generation method to alleviate state space explosion problem to some extent. The proposed theory and method are then applied in interoperability testing of IPv6 neighbor discovery protocol to show the feasibility of this method.

关键词： protocol testing interoperability testing real-time testing test generation timed input output automata(TIOA)

A TTCN-3.based protocol testing system and its extension

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Science in China(Series F) 2008年第11期51卷 1703-1722页

作者： YIN Xia1,3.WANG ZhiLiang2,3.JING ChuanMing1,3.& SHI XinGang2,3.1 Department of Computer Science and Technology,tsinghua university,beijing{3.,China 2 Network Research center,tsinghua university,beijing{3.,China 3.tsinghua national Laboratory for Information Science and Technology(TNList) ,beijing{3.,China Department of Computer Science and Technology Tsinghua University Beijing China tsinghua national Laboratory for Information Science and Technology (TNList) Beijing China Network Research center Tsinghua University Beijing China

The protocol testing technology used in the next generation Internet should satisfy some new challenges and requirements. This paper focuses on the test suite description and test implementation techniques. TTCN-3.is chosen as the test suite description language and extended in both syntax and semantics to satisfy the requirements of protocol robustness testing. PITSv3. a protocol integrated testing system based on TTCN-3. is developed, and the extensions for robustness testing are implemented. Finally, two practical test applications are presented.

关键词： protocol testing TTCN-3 PITSv3 robustness testing

Chinese expert consensus on refined diagnosis,treatment,and management of advanced primary liver cancer(2023.edition)

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A measurement error model for microarray data analysis

肝脏研究（英文） 2024年第2期8卷 61-71页

作者： Xiufeng Liu Feng Xia Yue Chen Huichuan Sun Zhengqiang Yang Bo Chen Ming Zhao Xinyu Bi Tao Peng Aizier Ainiwaer Zhiwen Luo Fusheng Wang Yinying Lu national Clinical Research center for Infectious Diseases Society of Hepatology,beijing Medical Association Translational Medicine Branch,China Association of Gerontology and Geriatrics Department of Medical Oncology Bayi Hospital Affiliated to Nanjing Chinese Medical University NanjingJiangsuChina Department of Hepatobiliary Surgery Southwest HospitalArmy Medical University ChongqingChina Senior Department of Hepatology The Fifth Medical Center of PLA General HospitalBeijingChina Department of Liver Surgery and Transplantation Liver Cancer InstituteZhongshan HospitalFudan UniversityShanghaiChina Department of Interventional Therapy National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Department of Minimally Invasive Interventional Therapy Liver Cancer Study and Service GroupSun Yat-sen University Cancer CenterGuangzhouGuangdongChina Department of Hepatobiliary Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina Senior Department of Infectious Diseases The Fifth Medical Center of PLA General HospitalBeijingChina Comprehensive Liver Cancer center The Fifth Medical Center of PLA General HospitalBeijingChina

Hepatocellular carcinoma(HCC),commonly known as primary liver cancer,is a major cause of malignant tumors and cancer-related deaths in China,accounting for approximately 85％of all cancer cases in the *** guidelines have been used to diagnose and treat liver ***,these guidelines provide a broad definition for classifying advanced liver cancer,with an emphasis on a singular approach,without considering treatment options for individual ***,it is necessary to establish a comprehensive and practical expert consensus,specifically for China,to enhance the diagnosis and treatment of HCC using the Delphi *** classification criteria were refined for Chinese patients with HCC,and the corresponding optimal treatment regimen recommendations were *** recommendations took into account various factors,including tumor characteristics,vascular tumor thrombus grade,distant metastasis,liver function status,portal hypertension,and the hepatitis B virus replication status of patients with primary HCC,along with treatment *** findings and rec-ommendations provide detailed,scientific,and reasonable individualized diagnosis and treatment strategies for clinicians.

关键词： Hepatocellular carcinoma (HCC) Targeted therapy Immunotherapy Refined diagnosis and treatment Expert consensus

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Progress in Natural Science:Materials International 2005年第7期15卷 614-620页

作者： ZHOU Yiming and CHENG Jing ( Department of Biological Sciences and Biotechnology, tsinghua university, beijing 100084, China State Key Laboratory of Biomembrane and Membrane Biotechnology, tsinghua university, beijing 100084, China national Engineering Research center for beijing Biochip Technology, 18 Life Science Parkway, beijing 102206, China) Department of Biological Sciences and Biotechnology Tsinghua University Beijing 100084 China State Key Laboratory of Biomembrane and Membrane Biotechnology Tsinghua University Beijing 100084 China national Engineering Research center for beijing Biochip Technology 18 Life Science Parkway Beijing 102206 China

Microarray technology has been widely used to analyze the gene expression levels by detecting fluorescence intensity in a high throughput fashion. However, since the measurement error produced from various sources in microarray experiments is heterogeneous and too large to be ignored, we propose here a measurement error model for microarray data processing, by which the standard deviation of the measurement error is demonstrated to be linearly increased with fluorescence intensity. A robust algorithm, which estimates the parameters of the measurement error model from a single microarray without replicated spots, is provided. The model and algorithm for estimating of the parameters from a given data set are tested on both the real data set and the simulated data set, and the result has been proven satisfactory. And, combining the measurement error model with traditional Z-test method, a full statistical model has been developed It can significantly improve the statistical inference for identifying differentially expressed genes.

关键词： microarray measurement error model parameter estimation differentially expressed genes.

Scheduling of Development Projects with Uncertain Iterations

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Journal of Systems Engineering and electronics 2001年第2期12卷 82-86页

作者： Yan Jihong & Wu Cheng national CIMS Engineering Research center, tsinghua university,{3., P R. China national CIMS Engineering Research center Tsinghua University Beijing 100084 P. R. China

This paper studies the scheduling of design projects in concurrent development process with uncertain number of feedback revisions. An optimization based methodology that combines heuristic algorithm, artificial intelligence (fuzzy, genetic algorithm) and scheduling theory is developed. In the algorithm, weighting values of some key factors are defined by genetic algorithm. In addition, fuzzy logic is used to decide the ability coefficients of different roles taken by designers. Moreover, the process of pre-release and feedback revision is realized. Simulation example is a fraction of practical development project, and satisfied results are obtained.

关键词： Concurrent engineering Product development process Optimization scheduling.