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物理学报 1987年第2期36卷 131-139页

作者：胡宁海刘永盛周清廉郭东耀中国科学院长春应用化学研究所吉林大学理论化学研究所

本文系统论述实现Σ_4关系计算的具体方法及其实际应用价值。对五个不同类型的已知晶体结构计算表明,利用Σ_4关系能够获得大量的、可靠性较高的O,π型结构半不变量相角。文中讨论了它们在测定晶体结构中的可能应用前景。

关键词：相角概率计算线性理论结构因子

∑关系线性理论的应用(Ⅱ)——∑_7关系的应用问题

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物理学报 1987年第2期36卷 140-148页

作者：胡宁海刘永盛周清廉郭东耀中国科学院长春应用化学研究所吉林大学理论化学研究所

本文根据“Σ关系线性理论”的原则,提出了可行的Σ_7关系运算方案。用五个不同类型的已知结构进行了验证。文中对Σ_7和Σ_3关系作了比较,并讨论了这一类关系式的实际应用价值。

关键词：线性理论约束条件符号计算结构因子

Effects of Al8Cu4Er Phase on Corrosion Behavior of Al-Cu-Mg alloy with Er addition

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Acta Metallurgica Sinica(English Letters) 2020年第10期33卷 1379-1387页

作者： Wei-ning Shi hai-Fei Zhou Xin-Fang Zhang State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Zhejiang Electric Power Corporation Research Institute Hangzhou 310014China

The effect of Al8Cu4Er phase on the corrosion behavior of Al-Cu-Mg alloy with rare earth Er addition in an under-aging state was *** results revealed that the addition Er into the Al-Cu-Mg alloy induced the formation of Al8Cu4 Er *** Al8Cu4Er phase can significantly refine the grains during recrystallization,thereby suppressing the continuous precipitation of S-phase at grain boundaries and improving the resistance to intergranular ***,the corrosion susceptibility of local regions around the Al8Cu4Er phase with large dimension was higher than that of the AlCuFeMnSi phase,but weaker than that of θ phase,resulting in decreased pitting corrosion resistance.

关键词： Aluminum alloy Er micro-alloying Corrosion Grain boundaries Secondary phase

Leaching process of phosphorus and iron from steelmaking slag into malic acid solution

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Journal of Iron and Steel Research International 2022年第6期29卷 951-960页

作者： ning-ning Lv Chang Su hui Kong hai-chuan Wang Yuan-chi Dong Key Laboratory of Metallurgical Emission Reduction and Resources Recycling Ministry of EducationAnhui University of TechnologyMa’anshan 243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina

In order to remove phosphorus element from steelmaking slag and decrease iron loss,malic acid was selected as the leaching agent to dissolve steelmaking ***,the influences of different factors,such as malic acid concentration,slag particle size,temperature,liquid/solid ratio and stirring speed,on the leaching ratios of phosphorus and iron were ***,the kinetics for the leaching process of phosphorus was *** results showed that the leaching ratios of phosphorus and iron increase significantly with increasing the malic acid solution concentration and liquid/solid *** the concentration of malic acid solution increases up to 0.01492 mol/L,about 80%phosphorus can be dissolved,and iron leaching ratio is less than 17%.In addition,decreasing slag particle size can obviously increase the leaching ratio of ***,temperature and stirring speed have no significant effect on the dissolution of phosphorus and *** leaching kinetics of phosphorus follows the unreacted shrinking core *** through product layer is the rate-limiting step of the leaching process,and the corresponding apparent activation energy is determined to be 3.32 kJ/***,a semi-empirical kinetic equation was established.

关键词： Leaching process Steelmaking slag Phosphorus Iron Malic acid solution

Fault locating for traveling-wave accelerators based on transmission line theory

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Nuclear Science and Techniques 2023年第8期34卷 24-34页

作者： Tong-ning hu hai-Meng Wang Yi-Feng Zeng Hong-Jie Xu Li Chen Guang-Yao Feng Yuan-Ji Pei State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Grid Fujian Economic Research Institute Fuzhou 350012China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Radio-frequency(RF)breakdown analysis and location are critical for successful development of high-gradient traveling-wave(TW)accelerators,especially those expected to generate high-intensity,high-power *** with commonly used schemes involving dedicated devices or complicated techniques,a convenient approach for breakdown locating based on transmission line(TL)theory offers advantages in the typical constant-gradient TW-accelerating *** deliver such an approach,an equivalent TL model has been constructed to equate the TW-accelerating structure based on the fun-damental theory of the TL transient response in the time *** equivalence relationship between the TW-accelerating structure and the TL model has been established via analytical derivations associated with grid charts and verified by TL circuit ***,to validate the proposed fault-locating method in practical applications,an elaborate analysis via such a method has been conducted for the recoverable RF-breakdown phenomena observed at an existing prototype of a TW-accelerating-structure-based beam injector constructed at the huazhong University of Science and *** addition,further considerations and discussion for extending the applications of the proposed method have been *** breakdown-locating approach involving the transient response in the framework of TL theory can be a conceivable supple-ment to existing methods,facilitating solution to construction problems at an affordable cost.

关键词： Traveling-wave structure RF breakdown Fault locating Transmission line

Classification of stellar populations in globular clusters

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Research in Astronomy and Astrophysics 2017年第5期17卷 107-112页

作者： Yue Wang Gang Zhao hai-ning Li Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences

Possessing multiple stellar populations has been accepted as a common feature of globular clusters（GCs）. Different stellar populations manifest themselves with different chemical features,e.g. the well-known O-Na anti-correlation. Generally, the first（primordial） population has O and Na abundances consistent with those of field stars with similar metallicity; while the second（polluted） population is identified by their Na overabundance and O deficiency. The fraction of the populations is an important constraint on the GC formation scenario. Several methods have been proposed for the classification of GC populations. Here we examine a criterion derived based on the distribution of Galactic field stars, which relies on Na abundance as a function of [Fe/H], to distinguish first and second stellar populations in GCs. By comparing the first population fractions of 17 GCs estimated by the field star criterion with those in the literature derived by methods related to individual GCs, we find that the field star criterion tends to overestimate the first population fractions. The population separation methods,which are related to an individual GC sample, are recommended because the diversity of GCs can be taken into consideration. Currently, more caution should be exercised if one wants to regard field stars as a reference for the identification of a GC population. However, further study on the connection between field stars and GCs populations is still needed.

关键词： stellar populations stars criterion distinguish scenario primordial abundance manifest constraint

甩带Fe_(85)Ga_(15)合金的巨磁致伸缩研究

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物理学报 2004年第9期53卷 3191-3195页

作者：刘国栋李养贤胡海宁曲静萍柳祝红代学芳张铭崔玉亭陈京兰吴光恒河北工业大学材料学院天津300130 中国科学院物理研究所磁学国家重点实验室北京100080

利用甩带快淬方法制备了Fe85Ga1 5合金样品 .测量了样品在沿带片长度方向和厚度方向上的磁致伸缩 ,发现其值分别高达 - 1 30 0ppm和 +1 1 0 0ppm .巨大磁致伸缩的获得来源于甩带样品的形状各向异性和合金内部生成的大量短程应变有序以... 详细信息

利用甩带快淬方法制备了Fe85Ga1 5合金样品 .测量了样品在沿带片长度方向和厚度方向上的磁致伸缩 ,发现其值分别高达 - 1 30 0ppm和 +1 1 0 0ppm .巨大磁致伸缩的获得来源于甩带样品的形状各向异性和合金内部生成的大量短程应变有序以及它们的择优取向 .样品温度特性的测量表明 ,在室温附近约 6 0℃宽的温度范围 ,合金的磁致伸缩数值基本保持不变 ;而在高温条件下。

关键词：磁致伸缩材料 Fe-Ga合金甩带快淬法结构取向功能材料

Decomposed Modeling of Controllable and Uncontrollable Components in Power Systems with High Penetration of Renewable Energies

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1164-1173页

作者： hai Li ning Zhang Yue Fan Ling Dong Pengcheng Cai State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Qinghai Electric Power Co. Ltd.XiningChina State Grid Xinjiang Electric Power Co. Ltd.UrumqiChina

The high penetration of variable renewable energies requires the flexibility from both the generation and demand sides. This raises the necessity of modeling stochastic and flexible energy resources in power system operation. However,some distributed energy resources have both stochasticity and flexibility, e.g., prosumers with distributed photovoltaics and energy storage, and plug-in electric vehicles with stochastic charging behavior and demand response capability. Such partly controllable participants pose challenges to modeling the aggregate behavior of large numbers of entities in power system operation. This paper proposes a new perspective on the aggregate modeling of such energy resources in power system ***, a unified controllability-uncontrollability-decomposed model for various energy resources is established by modeling the controllable and uncontrollable parts of energy resources separately. Such decomposition enables the straightforward aggregate modeling of massive energy resources with different controllabilities by integrating their controllable components with linking constraints and uncontrollable components with dependent discrete convolution. Furthermore, a two-stage stochastic unit commitment model based on the proposed model for power system operation is established. The proposed model is tested using a three-bus system and real Qinghai provincial power grid of China. The result shows that this model is able to characterize at high accuracy the aggregate behavior of massive energy resources with different levels of controllability so that their flexibility can be fully explored.

关键词： Aggregation dependent discrete convolution flexibility stochastic unit commitment virtual power plant

Material removal mechanisms and characteristics of potassium dihydrogen phosphate crystals under nanoscratching

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Advances in Manufacturing 2021年第4期9卷 558-567页

作者： ning Hou Yong Zhang Liang-Chi Zhang Ming-hai Wang School of Mechatronics Engineering Shenyang Aerospace UniversityShenyang 110136People’s Republic of China Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process Shenyang Aerospace UniversityShenyang 110136People’s Republic of China School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China

Potassium dihydrogen phosphate(KDP)crystals are important materials in high-energy laser ***,because these crystals are brittle and soft,machining-induced defects often emerge in KDP *** study aimed to investigate the material removal mechanisms and characteristics of KDP during nanoscratching using Berkovich,spherical,and conical *** found that KDP surface layers could be removed in a ductile mode at the micro/nanoscale and that dislocation motion was one of the main removal *** characteristics are related to the stress fields generated by indenter *** spherical indenter achieved a ductile removal mode more *** lateral force of nanoscratching increased with an increase in the normal *** coefficient of friction(COF)followed the same trend as the lateral force when spherical and conical indenters were ***,the COF was independent of the normal force when using a Berkovich *** found that these COF variations could be accurately described by friction models.

关键词： Potassium dihydrogen phosphate(KDP)crystals Removal mechanism Nanoscratching Indenter geometry

Size analysis of slag eye formed by gas blowing in ladle refining

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Journal of Iron and Steel Research International 2017年第3期24卷 243-250页

作者： ning-ning Lv Liu-shun Wu hai-chuan Wang Yuan-chi Dong Chang Su School of Metallurgical Engineering Anhui University of Technology Ma'anshan 243032 Anhui China Key Laboratory of Metallurgical Emission Reduction & Resources Recycling Ministry of Education Ma' anshan 243002 AnhuiChina

The formation of slag eye in a gas stirred ladle was studied through cold models and industrial trials. In the cold model,water and sodium tungstate solution were employed to simulate liquid steel,and silicon oil was employed to simulate slag. The simulation results revealed that the gas flow rate and bath height had strong effects on the slag eye size. In particular,the thickness of slag layer played a strong role in the slag eye size. In addition,the slag eye could not be formed when the thickness of the top layer was more than 4 cm in water-silicone oil ***,the section area of vessel had a great impact on the slag eye size. Industrial trials results showed a similar trend that the gas flow rate was very significant on the slag eye size. The predictions of the existing models showed larger predictions deviations compared with the experimental data. Moreover,a new model without fitting parameters was developed based on force balance and mathematical derivation,and verified by the experimental data. The new model provides the prediction with small deviations by comparing with the data acquired from cold models and industrial trials.

关键词： Slag eye Cold model Industrial trial Gas blowing Ladle refining