检索结果-南通市图书馆

Formation and corrosion properties of Fe-based bulk metallic glasses

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

International Journal of minerals,Metallurgy and Materials 2010年第3期17卷 323-326页

作者： Chun-lei Zhu Qing wang jie Zhang Ying-min wang Chuang Dong School of Material Science and Engineering Dalian University of Technology Dalian 116024 China

Bulk metallic glass （BMG） formation was explored in the Fe-B-Si-Nb alloy system though combined use of the atomic cluster line approach and the minor alloying strategy. The basic ternary compositions in the Fe-B-Si system were determined by the intersection points of two cluster lines, namely, Fe-B cluster to Si and Fe-Si cluster to B. 3at% -4at% Nb was added to the quaternary Fe-B-Si-Nb alloy. The casting experiments revealed that good glass-forming ability （GFA） occurred at the （Fe73.4Si8.2B18.4）96Nb4 composition, and 3-mm diameter BMG samples were made. The glass transition temperature （Tg）, crystallization temperature （Tx）, and supercooled liquid region （△Tx=Tx-Tg） of this BMG were measured to be 866, 889, and 23 K, respectively. The BMG shows a high Vickers hardness of about Hv 1164, a Young＇s modulus of 180 GPa, and a good corrosion resistance in the solutions of 1 mol/L HCl and 3wt% NaCl.

关键词： bulk metallic glasses (BMG) cluster atomic cluster corrosion glass-forming ability

Image Steganalysis System optimization Based on Boundary Samples

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2014年第6期21卷 57-62页

作者： Li-Na wang min-jie wang Ting-Ting Zhu Qing Dou Key Laboratory of Aerospace Information Security and Trusted Computing ministry of Education Wuhan University School of Computer Wuhan University

In the image steganalysis,the training samples often determine the performance of the model when the features and classification are in the same *** the existing research on steganalysis lacks the in-depth study of the classifier's training method which may deeply influence the detection *** paper provides an optimization of universal steganalysis based on the boundary samples classification concerning about image *** paper proposes a strategy of selecting boundary samples in steganalysis and divides the training samples into good samples,poor samples and boundary samples three categories and then chose the optimal threshold to get boundary samples through *** experimental results show the effectiveness of boundary sample,which dramatically improve detection capability especially for the low embedding rate Stego-image.

关键词： image steganalysis digital forensics support vector machine(SVM) boundary samples

Spectroscopic Parameters of X^3∑^-, a^1△, and A^＇3△ Electronic States of SO Radical

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2012年第5期25卷 533-539,I0003页

作者： jie-min wang Heng-qiang Feng Jin-feng Sun De-heng Shi Zun-lue Zhu Department of Physics and Electronic Information Luoyang Normal CollegeLuoyang 471022China College of Physics and Information Engineering Henan Normal UniversityXinxiang 453007China

The potential energy curves （PECs） of three low-lying electronic states （X^3∑, a^1△, and a^3△） of SO radical have been studied by ab initio quantum chemical method. The calcula- tions were carried out with the full valence complete active space self-consistent field method followed by the highly accurate valence internally contracted multireference configuration in- teraction （MRCI） approach in combination with correlation-consistent basis sets. Effects of the core-valence correlation and relativistic corrections on the PECs are taken into account. The core-valence correlation correction is carried out with the cc-pCVDZ basis set. The way to consider the relativistic correction is to use the second-order Douglas-Kroll Hamiltonian approximation, and the correction is performed at the level of cc-pV5Z basis set. To obtain more reliable results, the PECs determined by the MRCI calculations are also corrected for size-extensivity errors by means of the Davidson modification （MRCI＋Q）. These PECs are extrapolated to the complete basis set limit by the two-point energy extrapolation scheme. With these PECs, the spectroscopic parameters are determined.

关键词： Spectroscopic parameter Core-valence correlation Relativistic correction Extrapolation

Pharmacological treatment of inhalation injury after nuclear or radiological incidents: The Chinese and German approach

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

Military Medical Research 2019年第2期6卷 159-169页

作者： Tian-Tian Yan Guo-An Lin min-jie wang Andreas Lamkowski Matthias Port Alexis Rump Military Burn Center the990th Hospital of the Joint Logistics SupportForces of Chinese PLA(the159th Hospital of Chinese PLA)Zhumadian463000HenanChina Bundeswehr Institute of Radiobiology MunichGermany

Inhalation injury is often associated with burns and significantly increases morbidity and mortality. The main toxic components of fire smoke are carbon monoxide, hydrogen cyanide, and irritants. In the case of an incident at a nuclear power plant or recycling facility associated with fire, smoke may also contain radioactive material. Medical treatments may vary in different countries, and in this paper, we discuss the similarities and differences in the treatments between China and Germany. Carbon monoxide poisoning is treated by 100% oxygen administration and,if available, hyperbaric oxygenation in China as well as in Germany. In addition, antidotes binding the cyanide ions and relieving the respiratory chain are important. Methemoglobin-forming agents(e.g., nitrites, dimethylaminophenol)or hydroxocobalamin(Vitamin B12) are options. The metabolic elimination of cyanide may be enhanced by sodium thiosulfate. In China, sodium nitrite with sodium thiosulfate is the most common combination. The use of dimethylaminophenol instead of sodium nitrite is typical for Germany, and hydroxocobalamin is considered the antidote of choice if available in cases of cyanide intoxications by fire smoke inhalation as it does not further reduce oxygen transport capacity. Systematic prophylactic use of corticosteroids to prevent toxic pulmonary edema is not recommended in China or Germany. Stable iodine is indicated in the case of radioiodine exposure and must be administered within several hours to be effective. The decorporation of metal radionuclides is possible with Ca(DTPA)or Prussian blue that should be given as soon as possible. These medications are used in both countries, but it seems that Ca(DTPA) is administered at lower dosages in China. Although the details of the treatment of inhalation injury and radionuclide(s) decorporation may vary, the general therapeutic strategy is very similar in China and Germany.

关键词： Fire smoke Inhalation injury Carbon monoxide Cyanide Radionuclide incorporation Decorporation

Parallel Bootload System via DSP

在线全文

学校读者我要写书评

暂无评论

微计算机信息 2008年第16期24卷 75-77页

作者： YAN jie-min XU Ru wang Deqing Communication engineering Department of Xiamen University Xiamen 361005China

The consideration of bootload is absolutely necessarily in the design of DSP systems. By designing a minimum system us-ing TMS320VC5502 and flash memory, this article designs an integrated scheme of its parallel bootload method. In addition, the ISP (In System Programming) technology for flash memory and the method of creating a boot table is discussed. Finally, application codes are successfully loaded from outer flash into internal RAM on the system, and the off-line execution is implemented.

关键词：平行引导装入系统数字信号处理极小值闪速存储器

The development of China National Geography Olympiad and the International Geography Olympiad

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2014年第4期24卷 767-768,F0003页

作者： WEI Dongying YANG jie wang min College of Geography Beijing Normal University Beijing 100875 China

The International Geography Olympiad （IGEO） is a competition for the best ][6 to 19 year old students from all over the world. Four students represent each country in a series of Geography tests in （generally） a four-five day program. The aims of the IGEO are to： 1. stimulate active interest in geographical and environmental studies among young people; 2. contribute positively to debate about the importance of geography as a senior secondary school subject by drawing attention to the quality of geographical knowledge, skills and interests among young people;

关键词：中学生中小学生奥林匹克

Passively stabilized single-photon interferometer

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第11期31卷 231-235页

作者： Hai-Long Liu min-jie wang Jia-Xin Bao Chao Liu Ya Li Shu-Jing Li Hai wang The State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

A single-photon interferometer is a fundamental element in quantum information *** most previously reported works,single-photon interferometers use an active feedback locking system to stabilize the relative phase between two arms of the ***,we use a pair of beam displacers to construct a passively stable single-photon *** relative phase stabilization between the two arms is achieved by stabilizing the temperature of the beam displacers.A purely polarized single-photon-level pulse is directed into the interferometer input *** analyzing and measuring the polarization states of the single-photon pulse at the output port,the achieved polarization fidelity of the interferometer is about 99.1±0.1%.Our passively stabilized single-photon interferometer provides a key element for generating highfidelity entanglement between a photon and atomic memory.

关键词： passively stable single-photon interferometer atom-photon entanglement polarization fidelity

Computed morphometric analysis and expression of alpha fetoprotein in hepatocellular carcinoma and its related lesion

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2000年第3期6卷 415-416页

作者： Li Juan Shen Zong Ji Zhang Yang ming Ou Hua Xian Zhang Run Huang Yun He min jie wang Guo Shu Xu Department of Pathology Kunming Medical CollegeKunming 650031China Department of Image Analyses Scientific Experiment Center Yunnan UniversityKunming 650091

INTRODUCTION Hepatocellular carcinoma(HCC)is closely relatedwith hepatitis and *** order to investigatethe pathogenesis and early pathologic diagnosis ofHCC,HCC and related lesions were analyzedqualitively and quantit... 详细信息

关键词： liver neoplasms carcinoma hepatocellular alpha fetoprotein morphometry

In vivo study of extracellular matrix coating enhancing fixation of the pedicle screw-bone＇s interface

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

Chinese Medical Journal 2011年第23期124卷 3945-3952页

作者： LIU Guo-min ZHANG Xing-yi XU Chuan-jie ZHU Xiao-min wang Jun LIU Yi Department of Ortiaopedics Department of Thoracic Surgery Changchun Jilin 130041 China

Based on in vivo research on the effect of the coating of the extracellular matrix composition of pedicle screws on the conduction and induction of bone formation in young sheep, the aim of this study was to investigate the application of coated pedicle screws in sheep with scoliosis whose spines are under constant development. Methods Four groups of pedicle screws were randomly implanted into bilateral L2-L5 pedicles of 2.5- to 3-month-old sheep. A static experiment was performed on one side and a loading test was performed on the other side by implanting connecting rods at the L2-L3 and L4-L5 segments. The changes in the force on the coated screws and the combination of the surface of the coated screws with the surrounding bone in the growth process of young sheep＇s spines with aging were observed. After 3 months, the lumbar vertebrae with the screws were removed and examined by micro-CT, histological, and biomechanical analyses. Results Under nonloading conditions, there is bone formation around the surfaces of coated screws. The bone forming on the surface of collagen/chondroitin sulfate/hydroxyapatite coating of pedicle screws is the most, the one of the collagen / chondroitin sulfate coating and hydroxyapatite coating is followed, and no significant difference between the two groups. In terms of the trabecular bone morphology parameters of the region of interest around the surface of the pedicle screws, such as bone mineral content, bone mineral density, tissue mineral content, tissue bone mineral density, bone volume fraction, and connection density, those associated with collagen/chondroitin sulfate/hydroxyapatite coatings are largest and those unassociated with coatings are smallest. Under nonloading conditions, the pullout strength of the collagen/chondroitin sulfate/hydroxyapatite-coated screws was largest, and that of the uncoated screws was minimal （P 〈0.01）. Under loading conditions, the maximum pullout strength of each group of pedicle screws was less

关键词： hydroxyapatite collagen chondroitin sulfate micro-CT biomechanics