检索结果-南通市图书馆

Impact of consolidation pressure on contaminant migration in clay liner

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2013年第3期6卷 340-353页

作者： Zhi-hong ZHANG Zhao-gang XU Xiu-li DU hong-yan li The Key Laboratory of Urban Security and Disaster Engineering Ministry of Education Beijing University of Technology

Consolidation deformation occurs in clay liners under the self-weight of wastes at a simple garbage dump or dredged sediment dump, which leads to a decrease in the porosity. However. the migration of contaminants in clay liners is influenced by the porosity. Thus, the impact of consolidation deformation of clay liners on the migration of contaminants cannot be ignored. Based on Biot＇s consolidation theory, the contaminant migration theory, and consideration of the three kinds of migration mechanisms of convection, diffusion, and adsorption, a one-dimensional migration model of contaminants in deforming porous media was established, and the finite difference method was adopted to obtain the numerical solutions for an established initial-boundary value problem. The impact of consolidation pressure on the migration law of a contaminant was studied. The results show that, regardless of adsorption modes, different consolidation pressures have similar impacts on the migration law of the contaminant. Namely, over a certain migration time, the greater the consolidation pressure is, the smaller the migration depth of the contaminant. The results also show that, while the migration time increases, the impact of a certain increment of consolidation pressure on the variation of contaminant concentration with the depth increases gradually and, while the migration depth increases, the impact of a certain increment of consolidation pressure on the variation of the contaminant concentration with time increases gradually.

关键词： clay liner consolidation pressure consolidation deformation. contaminantmigration

Two Schemes for Probabilistic Remote Preparation of a Four-Particle Entangled Cluster-Type State

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2014年第3期61卷 305-314页

作者： HOU Kui WANG hong-yan li Yi-Bao Department of Mathematics and Physics Anhui Jianzhu University Hefei 230601 China

Using partial entangled states as the quantum channel, two schemes for probabilistic remote preparation of the four-particle cluster-type state with real and complex coefficients are presented. In the first scheme, the sender and the receiver share two partial Bell states and one partial three-qubit GHZ stats as the quantum channel, and the sender can help a remote receiver to prepare a four-particle entangled cluster-type state by using three-qubit projective measurements with certain probability. In the second scheme, the quantum channel is composed of two partial three-qubit GHZ states, the remote state preparation(RSP) can be successfully realized via the positive operator valued measure(POVM), and the two-particle projective measurements are also needed in this process. The total success probability and classical communication cost are calculated.

关键词： remote state preparation GHZ state Positive operator-valued measure classical information

Evaluation of Impact of Major Causes of Death on life Expectancy Changes in China,1990-2005

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2009年第5期22卷 430-441页

作者： yan-hong WANG li-MING li Department of Epidemiology&Biostatistics School of Public HealthPeking University Health Science CenterBeijing 100191China

Objective To evaluate the impact of major causes of death on changes of life expectancy in China. Methods life expectancy was calculated by standard life table techniques using mortality data from the national censuses in 1990 and 2000 and the 1% National Population Sampling Surveys in 1995 and 2005, Mortality data about the major causes of death from VR-MOH were used as reference values to estimate their death proportions of the specific age groups by sex and regions, as well as all-cause mortality and age-specific mortality rates of major causes of death. Decomposition method was used to quantitatively evaluate the impact. Results Three key findings were identified in our study. First, China's health challenge was shifted from diseases related to living conditions to those related to behavior and lifestyle, with rural areas relatively lagged behind urban areas, Second, the impacts of cardiovascular diseases and neoplasm on the middle aged and elderly population were stressed. Third, compared to the urban population, the rural population tended to have increasing mortality of neoplasm and cardiovascular diseases, especially in adults at the age of 15-39 years. Conclusion Further efforts should be made to reduce the incidence of neoplasm and cardiovascular diseases, especially in rural areas, by promoting healthy behavior and lifestyle and providing appropriate therapies for all patients in need.

关键词： China life expectancy Cardiovascular disease Neoplasm

Enhancement of radiosensitivity of MCF-7 breast cancer cells subjected to X-ray or carbon-ion irradiations

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2016年第1期27卷 75-81页

作者： Yi Xie Bing Wang Kaoru Tanaka hong-yan li Qiu-Yue Zhao hong Zhang Institute of Modern Physics Chinese Academy of Sciences509 Nanchang RoadLanzhou 730000China Key Laboratory of Heavy Ion Radiation Biology andMedicine of Chinese Academy of Sciences LanzhouChina Key Laboratory of Heavy Ion Radiation Medicine of GansuProvince LanzhouChina National Institute of Radiological Sciences ChibaJapan Graduate School of University of Chinese Academy of Sciences Beijing 100039China

The sensitivity of cancer cells to radiation therapy varies based on cell cycle phase. Here we evaluated the differences between X-ray and carbon-ion irradiation with respect to cellular radiosensitivity and cancer cycle arrest in the breast cancer cell line, MCF-7. The cell survival rate, cell cycle distribution and the presence of apoptosis were measured by clonogenic assay and flow cytometry. BRCA1 and p21 protein levels were analyzed by Western blot, and the levels of human telomerase reverse transcriptase(h TERT) m RNA expression and telomere length were detected with real-time polymerase chain reaction. The results show a significant dose-dependent effects on survival rate, apoptosis and protein levels in the carbon-ion group of MCF-7 cells. Decreased proliferation was not observed at 2 Gy X-ray irradiation. There were significant differences in cellular cycle arrest, apoptosis percentages and BRCA1 and p21 protein expression between X-ray and heavy-ion groups. The results indicatedthat increasing in BRCA1 and p21 expression, and attenuation of h TERT gene expression induced by heavy-ion irradiation in MCF-7 cells might relate to mechanism of cellular radiosensitivity in G2/M arrested phase.

关键词： MCF-7细胞 X射线照射放射治疗碳离子乳腺癌增敏作用人端粒酶逆转录酶细胞周期阻滞

Perturbation to Symmetries and Adiabatic Invariants of Nonholonomic System in Terms of Quasi-coordinates

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第5X期44卷 773-778页

作者： CHEN Xiang-Wei ZHAO Yong-hong li yan-Min Department of Physics Shangqiu Teachers College Shangqiu 476000 China

Based on the theory of lie symmetries and conserved quantities, the exact invariants and adiabatic invariants of nonholonomic system in terms of quasi-coordinates are studied. The perturbation to symmetries for the nonholonomic system in terms of quasi-coordinates under small excitation is discussed. The concept of high-order adiabatic invariant is presented, and the forms of exact invariants and adiabatic invariants as well as the conditions for their existence are given. Then the corresponding inverse problem is studied.

关键词： nonholonomic system in terms of quasi-coordinates perturbation exact invariant adiabatic invariant

BET in hematologic tumors:Immunity,pathogenesis,clinical trials and drug combinations

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2023年第6期10卷 2306-2319页

作者： Tao Ma yan Chen Zhi-Gang Yi yan-hong li Jun Bai li-Juan li lian-Sheng Zhang Department of Hematology The Affiliated Hospital of Southwest Medical UniversityLuzhouSichuan 646000China Department of Hematology Lanzhou University Second HospitalLanzhouGansu 730000China

The bromodomain and extra-terminal(BET)proteins act as“readers”for lysine acetylation and facilitate the recruitment of transcriptional elongation *** protein is associated with transcriptional elongation of genes such as c-MYC and BCL-2,and is involved in the regulation of cell cycle and ***,BET inhibitors(BETi)have regulatory effects on immune checkpoints,immune cells,and cytokine *** role of BET proteins and BETi in a variety of tumors has been *** paper reviews the recent research progress of BET and BETi in hematologic tumors(mainly leukemia,lymphoma and multiple myeloma)from cellular level studies,animal studies,clinical trials,drug combination,*** has a promising future in hematologic tumors,and future research directions may focus on the combination with other drugs to improve the efficacy.

关键词： BET BRD4 Clinical trials Hematologic tumors Immunity MYC

Global Periodic Attractor for Strongly Damped and Driven Wave Equations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2006年第1期22卷 75-80页

作者： hong-yan li Sheng-fan Zhou Department of Mathematics Shanghai University Shanghai 200444 China

In this paper we consider the strongly damped and driven nonlinear wave equations under homogeneous Dirichlet boundary conditions. By introducing a new norm which is equivalent to the usual norm, we obtain the existence of a global periodic attractor attracting any bounded set exponentially in the phase space, which implies that the system behaves exactly as a one dimensional system.

关键词： Wave equation global periodic attractor equivalent norm

PASS: a simple, efficient parallelism-aware solid state drive I/O scheduler

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第5期15卷 321-336页

作者： hong-yan li Nai-xue XIONG Ping HUANG Chao GUI Wuhan National Laboratory for Optoelectronics School of Computer Science and TechnologyHuazhong University of Science and Technology School of Information Management Hubei University of Economics School of Computer Science Colorado Technical University Colorado Spring

Emerging non-volatile memory technologies,especially flash-based solid state drives(SSDs),have increasingly been adopted in the storage *** provide numerous advantages over traditional mechanically rotating hard disk drives(HDDs)and have a tendency to replace *** to the long existence of HDDs as primary building blocks for storage systems,however,much of the system software has been specially designed for HDD and may not be optimal for non-volatile memory ***,in order to realistically leverage its superior raw performance to the maximum,the existing upper layer software has to be re-evaluated or *** this end,in this paper,we propose PASS,an optimized I/O scheduler at the linux block layer to accommodate the changing trend of underlying storage devices toward flash-based *** takes the rich internal parallelism in SSDs into account when dispatching requests to the device driver in order to achieve high ***,it partitions the logical storage space into fixed-size regions(preferably the component package sizes)as scheduling *** scheduling units are serviced in a round-robin manner and for every chance that the chosen dispatching unit issues only a batch of either read or write requests to suppress the excessive mutual ***,the requests are sorted according to their visiting addresses while waiting in the dispatching queues to exploit high sequential performance of *** experimental results with a variety of workloads have shown that PASS outperforms the four linux off-the-shelf I/O schedulers by a degree of 3%up to41%,while at the same time it improves the lifetime significantly,due to reducing the internal write amplification.

关键词： Solid state drive(SSD) I/O scheduler Parallelism

Non-isothermal Crystallization Kinetics and Isothermal Crystallization Kinetics in Supercooled liquid Region of Cu–Zr–Al–Y Bulk Metallic Glass

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2018年第3期31卷 290-298页

作者： Ke yang Xin-Hui Fan Bing li yan-hong li Xin Wang Xuan-Xuan Xu School of Material and Chemical Engineering Xi'an Technological University

The crystallization kinetics of Cu43Zr48Al9 and（Cu43Zr48Al9）98Y2 bulk metallic glasses in non-isothermal and isothermal conditions was studied by differential scanning *** the non-isothermal and isothermal modes,the average activation energy of（Cu43Zra8Al9）98Y2 is larger than that of Cu43Zr48Al9,meaning the higher stability against crystallization of（Cu43Zr48Al9）*** addition,the average activation energies for Cu43Zr48Al9 and（Cu43Zr48Al9）98Y2 calculated using Arrhenius equation in isothermal mode are larger than the values calculated by Kissinger-Akahira-Sunose method in non-isothermal mode,indicating that the energy barrier is higher in isothermal *** Johnson-Mehl-Avrami model was used to analyze the crystallization kinetics in the non-isothermal and isothermal *** Avrami exponent n for Cu43Zr48Al9 is above 2.5,indicating that the crystallization is mainly determined by a diffusion-controlled three-dimensional growth with an increasing nucleation rate,while the Avrami exponent n for（Cu43Zr48Al9）98Y2 is in the range of 1.5-2.5 in the non-isothermal mode,implying that the crystallization is mainly governed by diffusion-controlled three-dimensional growth with decreasing nucleation ***,the Avrami exponents n for Cu43Zr48Al9 and（Cu43Zr48Al9）98Y2 are different in the non-isothermal and isothermal conditions,which imply different nucleation and growth behaviors during the crystallization processes.

关键词： Bulk metallic glass Yttrium addition Crystallization behavior Activation energy