检索结果-南通市图书馆

新型缓蚀剂在化工设备安全方面实验研究与应用

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

科学技术与工程 2017年第3期17卷 273-276页

作者：李茜中海油天津化工研究设计院有限公司天津300131

针对化工生产过程中化工设备腐蚀现象严重,直接威胁到化工设备的安全问题,开发新型缓蚀剂Anti-C。通过动态失重实验对比传统缓蚀剂与Anti-C缓蚀剂的缓蚀效果,发现Anti-C缓蚀剂能够使腐蚀速率降低66%。实验对比发现,Anti-C缓蚀的最佳使... 详细信息

针对化工生产过程中化工设备腐蚀现象严重,直接威胁到化工设备的安全问题,开发新型缓蚀剂Anti-C。通过动态失重实验对比传统缓蚀剂与Anti-C缓蚀剂的缓蚀效果,发现Anti-C缓蚀剂能够使腐蚀速率降低66%。实验对比发现,Anti-C缓蚀的最佳使用浓度为150 mg/L,随着温度和压力的上升,Anti-C缓蚀剂的效果逐渐变差,但是变差的趋势变缓。实际应用中,Anti-C缓蚀化工设备效果明显,能够有效保护化工设备安全。

关键词：化工设备安全缓蚀剂

MEASUREMENT OF WELDING DYNAMIC DISPLACEMENT FIELDS BY ELECTRONIC SPECKLE PATTERN INTERFERENCE

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 841-844页

作者： D.q. li,D. li,L.H. Nan and X.T. Tian National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001,China

In order to effectively control the stress and distortion which produced in welding process, the dynamic change laws of displacement field is the most important factor. The characteristics of the welding dynamic displacement field is high temperature, high strain velocity, thus ordinary methods such as resistance strain gauge or Moiré method can not be used for the measurement of the zone of high temperature. Speckle interference method has the merits of non-contact, resistance to the disturbance of impure lights, high accuracy of measurement (half of wavelength).The paper represents the measurement of dynamic displacement field of argon-arcspot welding, by which it shows that the method of speckle interference is feasible for the measurement of welding dynamic displacement.

关键词： welding dynamic displacement field laser speckle inference image processing

The Three-Dimensional TWT Multi-Signal Nonlinear Beam-Wave Interaction

在线全文

学校读者我要写书评

暂无评论

The Three-Dimensional TWT Multi-Signal Nonlinear Beam-Wave I...

Primary tracheobronchial anaplastic large cell lymphoma in an 8-year-old child presenting with asthma-like symptoms

2002 3rd International Conference on Microwave and Millimeter Wave Technology

作者： J.q.li Y.L.Mo Y.Zhang Institute of High Energy Electronics University of Electronic Science and Technology of China

＜正＞Based upon the model of Rowe’s transmission -line equivalent circuit,using the maximal common submultiple fundamental frequency,a 3-dimensional（3D） multi-signal nonlinear model of beam-wave interaction in a helix traveling-wave tube （TWT） has been *** 3D model describes 2D RF fields,3D ac space-charge fields and 3D ac electron *** model has been implemented in the HTWT3D code,which can calculate any number of simultaneous signals,including input signals and their intermodulation *** from the HTWT3D code are shown to compare with measurements of output powers *** power.

关键词： Radio frequency Power generation Transmission lines Equivalent circuits Electron beams Power system modeling Communication systems Artificial satellites Space charge Optical modulation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Medical Journal 2014年第4期127卷 794-795页

作者： Shi H Han YP Bai C li q He MX Huang L Ma DL Department of Respiratory Medicine Changhai Hospital Second Military Medical University Shanghai 200433 China Department of Pathology Changhai Hospital Second Military Medical University Shanghai 200433 China

Primary tracheobronchial anaplastic large cell lymphoma （ALCL） is very *** spite of its rarity,tracheobronchial tumor can cause life-threatening airway obstruction because of its growing site and biological *** we r... 详细信息

关键词： anaplastic large cell lymphoma trachealbronchial anaplastic lymphoma kinase

Transcatheter Decompression of the Left Atrium in an Adolescent with a Double Inlet Left Ventricle, Severe Parachute Mitral Valve Stenosis and Pulmonary Hypertension

在线全文

学校读者我要写书评

暂无评论

World Journal of Cardiovascular Diseases 2017年第12期7卷 451-457页

作者： Y. H. Cai q. li Z. li G. Yang D. Schranz MINGCI Cardiovascular Hospital Heart Center Wuxi China

A 17-year-old adolescent with non-operated double inlet left-ventricle and severe stenosed parachute mitral valve is reported. He was admitted with repetitive syncope related to intermittent atrial fibrillation. life-threatening syncope combined with pre- and post-capillary pulmonary hypertension together with his single ventricle pathophysiology led to the decision for left atrial decompression by percutaneous static atrial septum ballooning after transseptal needle perforation. Aiming to create a restrictive atrial septum defect, unloading of the left atrium without disturbing the balanced hemodynamics was directed for a long-term palliation or as a basis for a further surgical follow-up approach.

关键词： Double Inlet Left Ventricle Parachute Mitral Valve Pulmonary Hypertension Left Atrial Decompression

Effect of Substrate Bias on Microstructure and Properties of Tetrahedral Amorphous Carbon Films

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

Effect of Substrate Bias on Microstructure and Properties of...

EXPERIMENTAL STUDY ON REACTION SYNTHESIS OF TiC IN Al-Ti-C SYSTEM

The Fourth International Conference on Physical and Numerical Simulation of Materials (ICPNS’2004)

作者： J.q.ZHU J.C.HAN S.H.MENG q.li M.L.TAN Center of Composite Materials Harbin Institute of Technology Harbin 150001 China Center of Composite Materials Harbin Institute of Technology Harbin 150001 China Center of Composite Materials Harbin Institute of Technology Harbin 150001 China Center of Composite Materials Harbin Institute of Technology Harbin 150001 China Center of Composite Materials Harbin Institute of Technology Harbin 150001 China

＜正＞The microstructure and properties of tetrahedral amorphous carbon （ta-C） films deposited by the filtered cathodic vacuum arc technology has been investigated by visible Raman spectroscopy, AFM and Nano-indentor. The Raman spectra have been fitted with a single skewed Lorentzian lineshape described by BWF function defining coupling coefficient, which characterizes the degree of asymmetry and is correlated with the sp3 content. When the substrate bias is -80 V, the sp3 content is the most and simultaneously the coupling coefficient is the least, following with the minimum root mean square surface roughness （Rq=0.23 nm） and the highest hardness （51.49 GPa）, Young’s modulus （512.39 GPa）, and critical scratching load （11.72 mN）. As the substrate bias is increased or decreased, the sp3 content and other properties lower correspondingly.

关键词： Tetrahedral amorphous carbon Filtered cathodic vacuum arc substrate bias

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1998年第4期11卷 255-260页

作者： E.L. Zhang B.Yang S.Y. Zeng and q.C. li(School of Materials Science and Engineering, Harbin Institute of Technology, BOX 428, Harbin 150001.)China)M.Z.Ma (Jiamusi University Jiamusi 154002, China) Harbin Inst of Technology Harbin China

The reaction process and mechanistn of reaction synthesis of TiC in Al-Ti-C system have been investigated in detail by observing the microstructure of the water quenched preform with SEM and EDX. The results showed that the reaction processing can be divided into three stages: aluminium powder is melted firstly, then titanium dissolves in the melted aluminium and Al3Ti is formed around titanium powder, titanium concentrates around carbon powder and a Ti-rich layer is observed around carbon pariicles,in which titanium atom reacts with carbon atom to synthesize TiC;TiC precipitates out of the melt, and diffuses out of the layer. A solution-precipitation mechanism and a reaction model were set up based on the experimental results.

关键词： kinetic process Al/TiC microstructure composite mechanism

THE MAGNETORESISTANT BEHAVIOR OF Ni_(85)Fe_(15) ALLOY FILM IMPLANTED BYCo^+

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 562-565页

作者： G.q. li, S. Z. Sun , Z. Xianyu , L.H. Sun and D. R. li Departmentof Physics, Northeastern University,Shenyang 110006 ,China

Implanting 1 ×1016 to1 ×1017 Co+/cm2 into Ni85 Fe15 alloy film anditschangesof mag netoresistantcharacters were researched . The results show that Co+ is very spectacular on modifying Ni85 Fe15 alloyfilm’s magnetoresistancecharacters. Atlower dose,theanisotrop ic magnetoresistivity ratio( AMR) and thesaturated magnetic field didn’tchange almost. ATmedium dose, the saturated magnetic field does not have great change either, butits AMRisraised from 1 % upto 3% . Thisiscomparabletothebest AMRvalueof permalloy based magnetoresistant material prepared by other methods. But the ion implantation tech niqueisrathersimpler. Whentheimplanting doseishigher,its AMRisalsoenhanced notice ably. However,theincreaseof saturated field saysthe material’sstructurecharacters have changed radically.

关键词： anisotropic magnetoresistivityratio, Ni85 Fe15 alloy, film ,ionimplanta tion

Conversion of solid organic wastes into oil via Boettcherisca peregrine(Diptera:Sarcophagidae) larvae and optimization of parameters for biodiesel production

在线全文

学校读者我要写书评

暂无评论

Conversion of solid organic wastes into oil via Boettcherisc...