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蛋白质磷酸化作用的结构基础

生物化学与生物物理进展 1997年第4期24卷 290-295页

作者：李林中国科学院上海生物化学研究所上海200031

蛋白质可逆磷酸化涉及到几乎所有细胞活动的调节 .

关键词：蛋白质磷酸化结构基础调节作用

Pt Complexes with High Molecular Weight Polyvinylmethyldimethylsiloxane Ligands Supported on Diatomite for Liquid-phase Hydrosilylation of 3, 3, 3-Trifluoropropene with Methyldichlorosilane

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Chinese Chemical Letters 2006年第6期17卷 803-806页

作者： Hong Liu LIA0 Huai Jun ZHU Feng Yi LI College of Chemical and Energy South China University of Technology Guangzhou 510640 Chemistry Department of Nanchang University Nanchang 330047

Pt complexes with high molecular weight polyvinylmethyldimethylsiloxane （HMPVMS） ligands supported on diatomite as a catalyst for the hydrosilylation of 3, 3, 3-trifluoropropene and methyldichlorosilane. Results show that this catalyst displays good thermal stability, high activity and excellent recyclability, and it can be readily fabricated by a simple process.

关键词： Pt hydmsilylation high molecular weight polyvinylmethyldimethylsiloxane.

Nanowire encapsulation with polymer for electrical isolation and enhanced optical properties

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Nano Research 2017年第8期10卷 2657-2666页

作者： Tuomas Haggren Ali Shah Anton Autere Joona-Pekko Kakko veer Dhaka Maria Kim Teppo Huhtio Zhipei Sun Harri Lipsanen Department of Micro- and Nanosciences Micronova Aalto University P.O. Box 13500 Fl-00076 Aalto Finland

Light management and electrical isolation are essential for the majority of optoelectronic nanowire （NW） devices. Here, we present a cost-effective technique, based on vapor-phase deposition of parylene-C and subsequent annealing, that provides conformal encapsulation, anti-reflective coating, improved optical properties, and electrical insulation for GaAs nanowires. The process presented allows facile encapsulation and insulation that is suitable for any nanowire structure. In particular, the parylene-C encapsulation functions as an efficient antireflection coating for the nanowires, with reflectivity down to 〈1% in the visible spectrum. Furthermore, the parylene-C coating increases photoluminescence intensity, suggesting improved light guiding to the NWs. Finally, based on this process, a NW LED was fabricated, which showed good diode performance and a clear electroluminescence signal. We believe the process can expand the fabrication possibilities and improve the devices. performance of optoelectronic nanowire

关键词： antireflection GaAs parylene-C metallo-organic vapor phase epitaxy (MOVPE) annealing light emitting diode (LED)

The Transport Properties of Concrete under the Simultaneous Coupling of Fatigue Load and Environment Factors

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 181-186页

作者： WANG Caihui SUN Wei JING Jinyang HAN Jiande R0NG Hui School of Materials Science and Engineering Southeast University Jiangsu Key Laboratory of Construction Materials

A set of coupling experimental instrument was designed to study the transport properties of chloride ion in concrete under simultaneous coupling action of fatigue load and environmental factors. Firstly the water-saturated performance of modem concrete was investigated, then diffusion performance of chloride ion under different stress levels and different temperature were studied respectively; meanwhile, the time- dependent behavior of the chloride ion diffusion in concrete was also researched. The results showed that the saturation degree of concrete can reach as high as 99%. Besides, diffusion coefficient of chloride ion increased with increasing of the stress level and temperature, and when the stress level and temperature are at 0.6 and 60 ℃ respectively, the diffusion coefficient is 6.3 ×10 -14 m2/s, moreover the diffusion coefficient of chloride ion in concrete decreased with time under the simultaneous coupling action of fatigue load and environment factors.

关键词： chloride diffusion fatigue load concrete stress level temperature time dependent

ROLLING CONTACT FATIGUE BEHAVIOR OF CERAMIC BALLS LUBRICATED BY LUBRICANTS WITH EXTREME PRESSURE ADDITIVES

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 195-199页

作者： ZHANG Feng S0NG Baoyu QU Jianjun LIU Weimin School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000 China

An experiment is conducted to investigate the effects of lubricant10#, which contains extreme pressure additives T304 and T305, on the rolling contact fatigue （RCF） life of the contact pairs of a Si3N4 ceramic ball and a steel rod. The experimental investigation is carried out using a ball-rod RCF test rig. The results show that the extreme pressure additives increase the anti-contact-fatigue performance of ceramic balls; When the content of the additives varies from 1% to 5%, the increasing gradient of the RCF life curve decreases; And the oil sample with 1% T305 additive corresponds to the maximal gradient of the RCF life curve, with the RCF life being increased by about 10.77 times. The fatigue surface of the ceramic ball is analyzed with scanning electron microscope （SEM） and X-ray electron dispersion analysis（EDAX）, and the physical model of extreme pressure additives＇ increasing the RCF life of the ceramic ball is proposed. It is found that the extreme pressure additives form a corrosive film and a transfer film on the surface of the ceramic ball, which decrease the surface tangential stress, and to increase the surface energy is the most effective means for increasing the RCF life.

关键词： Ceramic bearing Si3N4 ceramic Rolling contact fatigue Extreme pressure additive

A New Perspective of the Physical Processes Associated with the Clear-Sky Greenhouse Effect over High Latitudes

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Advances in Atmospheric Sciences 2004年第2期21卷 171-180页

作者： Zuohao CA0 Ronald E．STEWART M．K．YAU MeteorologicalServiceofCanada，Ontario，Canada DepartmentofAtmosphericandOceanicSciences，McGillUniversityMontreal，Quebec，Canada

The physical processes associated with the clear-sky greenhouse effect in the presence of water vapor are examined by including surface emissivity in the greenhouse effect formulation, and by introducing a new way to partition physical processes of the greenhouse effect. In this new framework, it is found that the clear-sky greenhouse effect is governed by three physical processes associated with (1) the temperature contrast between the surface and the atmosphere, (2) the interaction between the surface emissivity and the temperature contrast, and (3) the surface emissivity. The importance of the three physical processes is assessed by computing their vertical and spectral variations far the subarctic winter and summer standard atmosphere using the radiation model MODTRAN3 (Moderate Resolution Transmittance code Version 3). The results show that the process associated with the temperature contrast between the surface and the atmosphere dominates over the other two processes in magnitude. The magnitude of this process has substantial variations in the spectral region of 1250 to 1880 cm-1 and in the far infrared region. Due to the low-level temperature inversion over the subarctic winter, there exists a negative contribution to the greenhouse trapping. The seasonal variations are, however, dominated by the processes associated with the interaction between the surface emissivity and the temperature contrast as well as the surface emissivity itself. The magnitudes of these two physical processes contributing to the greenhouse trapping over the subarctic winter are about 7 to 10 times of those over the subarctic summer, whereas the magnitude of the processes associated with the temperature contrast in the subarctic summer is only about 2 times of that in the subarctic winter.

关键词： greenhouse effect surface ernissivity physical processe high latitude seasonal variation

ALGORITHM AND IMPLEMENTATION OF AUTO-SEARCHING WELD LINE FOR WELDING MOBILE ROBOT

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 176-180页

作者： ZHANG Ke Lü Xueqin　 WU Yixiong L0U Songnian Institute of Welding Engineering Shanghai Jiaotong UniversityShanghai 200030 China

An algorithm of auto-searching weld line for welding mobile robot is presented. Auto-searching weld line is that the robot can automatically recognize a weld groove according to the characteristics of the weld groove before welding, and then adjust itself posture to the desired status preparing for welding, namely, it is a process that the robot autonomously aligns itself to the center of welding seam. Firstly, the configuration of welding mobile robot with the function of auto-searching weld line is introduced, then the algorithm and implementation of auto-searching weld line are presented on the basis of kinematics model of the robot, at last trajectory planning among auto-searching weld line is investigated in detail. The experiment result shows that the developed welding mobile robot can successfully implement the task of auto-searching weld line before welding, tracking error precision can be controlled to approximate ±1.5 mm, and satisfy the requirement of practical welding project.

关键词： Welding mobile robot Auto-searching weld line Trajectory planning

Artificial intelligence and machine learning in drug discovery and development

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Intelligent Medicine 2022年第3期2卷 134-140页

作者： veer Patel Manan Shah Ahmedabad International School AhmedabadGujaratIndia Department of Chemical Engineering School of TechnologyPandit Deendayal Energy UniversityGandhinagarGujaratIndia

The current rise of artificial intelligence and machine learning has been *** has reduced the human workload improved quality of life *** article describes the use of artificial intelligence and machine learning to augment drug discovery and development to make them more efficient and *** this study,a systematic evaluation of studies was carried out;these were selected based on prior knowledge of the authors and a keyword search in publicly available databases which were filtered based on related context,abstract,methodology,and full *** body of work supported the roles of machine learning and artificial intelligence in facilitating drug development and discovery processes,making them more cost-effective or altogether eliminating the need for clinical trials,owing to the ability to conduct simulations using these *** also enabled researchers to study different molecules more extensively,without any *** results of this paper demonstrate the prevalent application of machine learning and artificial intelligence methods in drug discovery,and indicate a promising future for these technologies;these results should enable researchers,students,and pharmaceutical industry to dive deeper into machine learning and artificial intelligence in a drug discovery and development context.

关键词： Artificial intelligence Machine learning Drug discovery

Sintering Properties and Optimal Blending Schemes of Iron Ores

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Journal of Iron and Steel Research International 2012年第6期19卷 1-5页

作者： Dauter0liveira WUSheng—li DAIYu—ming XUJian CHEN Hong SchoolofMetallurgicalandEcologicalEngineering UniversityofScienceandTechnologyBeijingBeijing100083China； VALEShanghaiOffice Shanghai200070China

In order to obtain good sintering performance, it is important to understand sintering properties of iron ores. Sintering properties including chemical composition, granulation and high-temperature behaviors of ores from China, Brazil and Australia. Furthermore, several indices were defined to evaluate sintering properties of iron ores. The results show that： for chemical composition, Brazilian ores present high TFe, low SiOz, and low Alz03 con- tent. For granulation, particle diameter ratio of Brazilian ores are high; particle intermediate fraction of Chinese con- centrates are low; and average particle size and clay type index of Australian ores are high. For high-temperature properties, ores from China, Brazil and Australia present different characteristics. Ores from different origins should be mixed together to obtain good high-temperature properties. According to the analysis of each ore＇s sintering prop- erties, an ore blending scheme （Chinese concentrates 20 ^-1- Brazilian ores 400//oo -k Australian ores 40 ~） was sugges- ted. Moreover, sinter pot test using blending mix was performed, and the results indicated that the ore blending scheme led to good sintering performance and sinter quality.

关键词： sintering iron ores sintering property indices ore blending scheme