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Search Results: 1 - 10 of 228032 matches for " Li-Dong Wang "
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An Extension to Security Auditing Mechanism of Linux Shell
Linux Shell安全审计机制的扩展

WANG Li-dong,WANG Li-dong,
汪立东
,方滨兴

软件学报 , 2002,
Abstract: Command history records generated by Unix shell is one of the important sources of system auditing information. But command history does not include sufficient information for intrusion detection and the history records can be easily modified by user themselves. With Linux loadable kernel module technique and system call interception, an extension to security auditing mechanism of Linux shell is implemented in this paper, and then some examples are given for security monitoring with the new mechanism.
Circulating microRNAs: Novel biomarkers for esophageal cancer
Sheng-Li Zhou, Li-Dong Wang
World Journal of Gastroenterology , 2010,
Abstract: Esophageal carcinogenesis is a multi-stage process, involving a variety of changes in gene expression and physiological structure change. MicroRNAs (miRNAs) are a class of small non-coding endogenous RNA molecules. Recent innovation in miRNAs profiling technology have shed new light on the pathology of esophageal carcinoma (EC), and also heralded great potential for exploring novel biomarkers for both EC diagnosis and treatment. Frequent dysregulation of miRNA in malignancy highlights the study of molecular factors upstream of gene expression following the extensive investigation on elucidating the important role of miRNA in carcinogenesis. We herein present a thorough review of the role of miRNAs in EC, addressing miRNA functions, their putative role as oncogenes or tumor suppressors and their potential target genes. The recent progresses in discovering the quantifiable circulating cancer-associated miRNAs indicate the potential clinical use of miRNAs as novel minimally invasive biomarkers for EC and other cancers. We also discuss the potential role of miRNAs in detection, screening and surveillance of EC as miRNAs can be a potential target in personalized treatment of EC.
Preparation of Pr0.7Ca0.3MnO3 Nanocrystalline Films by Chemical Solution Deposition Route
用化学溶液沉积方法制备Pr0.7Ca0.3MnO3薄膜

WANG Qun,DONG Rui,CHEN Li-Dong,
王群
,董睿,陈立东

无机材料学报 , 2004,
Abstract: Mixed-valent manganites Pr1-xCaxMnO3 are the object of continuously growing interest in the field of superconductors and colossal magnetoresistance (CMR) materials. In this work, Pr1-xCaxMnO3 films were successfully prepared by a novel and simple chemical solution deposition method using Pt/Ti/SiO2/Si as the substrate. X-ray diffraction, FT-IR, SEM, AFM, electron microprobe analysis and Auger microprobe analysis were adopted for the characterization of the prepared material. It is proved that Pr1-xCaxMnO3 films obtained are of single-phase with perovskite structure. The constituent elements are homogeneous, and Pr0.7Ca0.3MnO3 particles are densely and compactly distributed in the films.
N-Benzyl-N-(4-chlorophenyl)acrylamide
Yi-Min Hu,Li-Dong Zhang,Jing Wang,Dong Cheng
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680706432x
Abstract: In the molecular structure of the title compound, C16H14ClNO, the acrylamide unit is essentially planar and makes dihedral angles of 80.06 (12) and 68.91 (13)°, respectively, with the benzene and phenyl rings. The dihedral angle between the two rings is 49.79 (11)°. In the crystal structure, molecules are connected via weak C—H...O and C—H...π interactions, forming a molecular tape running along the b axis.
Method for evaluating real performance costs of applications
一种评测应用程序实际性能开销的方法

QIAN Li-ping,WANG Li-dong,
钱丽萍
,汪立东

计算机应用 , 2006,
Abstract: A method to evaluate performance cost of applications was Presented based on execution delay of benchmarking-sequence. With well-chosen benchmark programs and well-designed viewpoints planted in them, the real costs of performance of a certain application can be evaluated relatively by calculating the delay of the characteristic viewpoints before and during executing the application under test. Such method was implemented on Linux with techniques of loadable kernel module and system call interception.
Partitioning multi-frames tasks among heterogeneous multi-processors based on genetic algorithms
基于遗传算法的异构多核多帧任务分配*

XU Cheng,WANG Li-dong,LIU Yan,
徐成
,王立东,刘彦

计算机应用研究 , 2009,
Abstract: Given a set of tasks and a collection of different kind processors, the problem was determining whether the tasks could be partitioned among the processors in such a manner that all timing constraints were met. This problem was intractable. A new task model: built heterogeneous multi-processors multi-frame task model and solution in genetic algorithms. Result shows that new model is more generalized, achieves larger succeed partitioning percent; the algorithms have lower time-complexity and reliable result.
对10轮AES-128的中间相遇攻击
A meet-in-the-middle attack on 10-round AES-128

许力冬,王明强
XU Li-dong
, WANG Ming-qiang

- , 2018, DOI: 10.6040/j.issn.1671-9352.0.2017.465
Abstract: 摘要: 给出了AES-128相邻两轮的轮密钥之间的一个线性关系。通过将这一关系与Hüseyin Demirci和Ali Ayd?n Sel?uk在2008年提出的一个5轮AES区分器相结合,构造了一个8轮AES区分器。在这个8轮AES区分器的基础上,设计了一个对10轮AES-128的中间相遇攻击方案。这一方案在预计算阶段可以节省相当大的存储空间。
Abstract: Some relationship between different adjacent round keys of AES-128 was discovered. Combining this relationship with the principle of the 5-round distinguisher presented by Hüseyin Demirci and Ali Ayd?n Sel?uk in 2008, an 8-round distinguisher was proposed. Based on this distinguisher, a meet-in-the-middle attack on 10-round AES-128 was designed. And, this distinguisher can save a considerable memory space in the precomputation step
Microbiology, ecology, and application of the nitrite-dependent anaerobic methane oxidation process
Li-Dong Shen
Frontiers in Microbiology , 2012, DOI: 10.3389/fmicb.2012.00269
Abstract: Nitrite-dependent anaerobic methane oxidation (n-damo), which couples the anaerobic oxidation of methane to denitrification, is a recently discovered process mediated by “Candidatus Methylomirabilis oxyfera.” M. oxyfera is affiliated with the “NC10” phylum, a phylum having no members in pure culture. Based on the isotopic labeling experiments, it is hypothesized that M. oxyfera has an unusual intra-aerobic pathway for the production of oxygen via the dismutation of nitric oxide into dinitrogen gas and oxygen. In addition, the bacterial species has a unique ultrastructure that is distinct from that of other previously described microorganisms. M. oxyfera-like sequences have been recovered from different natural habitats, suggesting that the n-damo process potentially contributes to global carbon and nitrogen cycles. The n-damo process is a process that can reduce the greenhouse effect, as methane is more effective in heat-trapping than carbon dioxide. The n-damo process, which uses methane instead of organic matter to drive denitrification, is also an economical nitrogen removal process because methane is a relatively inexpensive electron donor. This mini-review summarizes the peculiar microbiology of M. oxyfera and discusses the potential ecological importance and engineering application of the n-damo process.
Effect of inhibitors on macroscopical oxidation kinetics of calcium sulfite
ZHAO Yi,WANG Li-dong,WANG Xiao-ming,LI Qiang-wei,XU Pei-yao,
ZHAO Yi
,WANG Li-dong,WANG Xiao-ming,LI Qiang-wei,XU Pei-yao

环境科学学报(英文版) , 2005,
Abstract: In the presence of inhibitors, the macroscopical oxidation kinetics of calcium sulfite, the main byproduct in wet limestone scrubbing, was studied for the first time by adding different inhibitors and varying pH, concentration of calcium sulfite, oxygen partial pressure, concentration of inhibitors and temperature. The mathematical model about the general oxidation reaction was established, which was controlled by three steps involving dissolution of calcium sulfite, mass transfer of oxygen and chemical reaction in the solution. It was concluded that the general reaction was controlled by mass transfer of oxygen under uncatalyzed conditions, while it was controlled by dissolution of calcium sulfite after adding three kinds of inhibitors. Thus, the theory was provided for investigating the mechanism and oxidation kinetics of sulfite. The beneficial references were also supplied for design of oxidation technics in the wet limestone scrubbing.
Measuring the space between vagina and rectum as it relates to rectocele
Jin Liu, Li-Dong Zhai, Yun-Sheng Li, Wan-Xiang Liu, Rui-Hua Wang
World Journal of Gastroenterology , 2009,
Abstract: AIM: To measure the normal space between the posterior wall of the vagina and the anterior wall of the respectively rectum using computed tomography (CT) and reveal its were relationship to rectocele.METHODS: A total of twenty female volunteers without rectocele were examined by CT scan. We performed a middle level continuous horizontal pelvic scan from the upper part to the lower part and collected the measurement data to analyze the results using t-test.RESULTS: Twenty volunteers were enrolled in the study. The space between the posterior wall of the vagina and the anterior wall of the rectum was measured at three levels (upper 1/3, middle, lower 1/3 level of vagina). The results showed that the space from the posterior wall of the vagina to the anterior wall of the rectum at the upper 1/3 level and the middle level was 3.896 ± 0.3617 mm and 4.6575 ± 0.3052 mm, respectively. When the two groups of data were compared, we found the space at the upper 1/3 level was shorter than at the middle level (P < 0.01). Moreover, at the lower 1/3 level the space measured was 10.058 ± 0.4534 mm. The results revealed that the space at the lower 1/3 level was longer than that at the middle level (P < 0.01).CONCLUSION: These measurement data may be helpful in assessing rectocele clinical diagnosis and functional outcomes of rectocele repair.
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