|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Finite element modeling of pore-fluid flow in the Dachang ore district,Guangxi,China:Implications for hydrothermal mineralization显示文摘当温度坡度足够地高时,在地球的上面的外壳以内在多孔的岩石和破裂中与毛孔液体的发行量联系的对流的热转移是实质的。以便在 Guangxi 的 Dachang 矿石区域理解 Sn-polymetallic 矿化作用的过程,一个有限元素方法在这研究被使用了在这个区域模仿毛孔液体流动和热转移。根据相关地质、构造、地球物理的限制,一个计算模型被建立。它使计算模拟和敏感分析能为调查可以在这个区域影响热水的矿石开始的形成矿石的毛孔液体流动和其它钥匙因素被执行。相关模拟结果显示了那:(1 ) 在矿石区域能为毛孔液体作为优先的小径服务的 Dachang 的可渗透的差错地区流动在上一地区性规模;并且(2 ) 毛孔液体流动能影响咸度分发。这个后者因素是 Sn-polymetallic 矿化作用发生在这个区域的原因的部分。 | Minghui Ju Chongbin Zhao Tagen Dai Jianwen Yang | 2011 | Geoscience Frontiers2011，2，3： | 8 |
| 2 | Abrasion Resistance Enhancement of Ultrafine-structured WC-Co Coating Fabricated by using in situ Synthesized Composite Powder显示文摘The ultrafine WC—Co composite powder was synthesized by a newly developed rapid route based on in situ reactions.By using the as-synthesized composite powder,the granulation processing was then carried out to prepare the ultrafine-structured thermal spraying feedstock.The influences of the heat-treatment process on density of the feedstock powder,phase constitution and wear resistance of the resultant WC—Co coatings fabricated by high velocity oxy-fuel(HVOF) were investigated.The results showed that increasing the heating temperature and extending the holding time leaded to remarkable increase in the density and flowability of the feedstock powder.As a result,the decarburization of the in-flight particles could be decreased and the wear resistance of coating was significantly enhanced.The present study demonstrated that the developed techniques for the ultrafine powder and its thermal-sprayed coatings had very promising applications in scaling up to produce ultrafine-structured cermet coatings with excellent performance. | Haibin Wang Xiaoyan Song Chongbin Wei Yang Gao Guangsheng Guo | 2013 | Journal of Materials Science & Technology2013，29，11： | 7 |
| 3 | A new alternative approach for investigating acidization dissolution front propagation in fluid-saturated carbonate rocks显示文摘The natural phenomenon associated with the chemical dissolution of dissolvable minerals of rocks can be employed to develop innovative technology in mining and oil extracting engineering.This paper presents a new alternative approach for theoretically dealing with chemical dissolution front(CDF) propagation in fluid-saturated carbonate rocks.Note that the CDF is represented by the porosity front in this study.In this new approach,the porosity,pore-fluid velocity and acid concentration are directly used as independent variables.To illustrate how to use the present new approach,an acidization dissolution system(ADS) consisting of carbonate rocks,which belongs to one of the many general chemical dissolution systems(CDSs),is taken as an application example.When the acid dissolution capacity(ADC) number(that is defined as the ratio of the volume of the carbonate rock dissolved by an acid to that of the acid) approaches zero,the present new approach can be used to obtain analytical solutions for the stable ADS.However,if the ADC number is a nonzero finite number,then numerical solutions can be only obtained for the ADS,especially when the ADS is in an unstable state.The related theoretical results have demonstrated that:(1) When the ADS is in a stable state and in the case of the ADC number approaching zero,the present new approach is mathematically equivalent to the previous approach,in which the porosity,pore-fluid pressure and acid concentration are used as independent variables.However,when the ADS is in an unstable state,the use of the present new approach leads to a free parameter that needs to be determined by some other ways.(2) The existence of a non-step-type dissolution front within a transient region should at least satisfy that none of the ADC number,injected acid velocity and reciprocal of the dissolution reaction rate is equal to zero in the stable ADS. | ZHAO ChongBin HOBBS Bruce ORD Alison | 2017 | Science China(Technological Sciences)2017，60，8： | 6 |
| 4 | Effect of Carbon Addition on Microstructure and Properties of WC-Co Cemented Carbides显示文摘Based on a unique method to synthesize WC-Co composite powder by insitu reactions of metal oxides and carbon, the effects of the carbon addition in the initial powders on the phase constitution, microstructure and mechanical properties of the cemented carbides were investigated. It is found that with a suitable carbon addition the pure phase constitution can be obtained in the sintered bulk from the composite powder. The mechanical properties of the cemented carbides depend on the phase constitution and the WC grain structure. To obtain the excellent properties of the WC-Co bulk, it is important to obtain the pure phase constitution from the appropriate carbon addition in the initial powders and a suitable grain size. | Chongbin Wei Xiaoyan Song Jun Fu Xiaosen Lv Haibin Wang Yang Cao ShixianZhao Xuemei Liu | 2012 | Journal of Materials Science & Technology2012，28，9： | 5 |
| 5 | Advances in numerical algorithms and methods in computational geosciences with modeling characteristics of multiple physical and chemical processes显示文摘This paper aims to provide a brief introduction to recent advances in numerical algorithms and methods in the emerging computational geoscience filed with general simulation characteristics of modeling multiple chemical and physical processes that take place in ore-generating systems within the Earth's crust. Due to significant differences between Earth systems and engineering systems, the existing numerical algorithms and methods, which are designed for simulating realistic problems in the engineering fields, may not be straightforwardly used to simulate ore-generating problems without significant improvements. Thus, extensive and systematic studies have been conducted, in recent years, to develop new numerical algorithms and methods for simulating different aspects of ore-generating problems. Not only can the outcomes of these studies provide new simulation tools for better understanding the controlled dynamic mechanisms that take place in ore-generating systems, but also they have enriched the research contents of computational mechanics in the broad sense. | ZHAO ChongBin | 2015 | Science China(Technological Sciences)2015，58，5： | 4 |
| 6 | Multi-state autonomous drilling for lunar exploration显示文摘Due to the lack of information of subsurface lunar regolith stratification which varies along depth, the drilling device may encounter lunar soil and lunar rock randomly in the drilling process. To meet the load safety requirements of unmanned sampling mission under limited orbital resources, the control strategy of autonomous drilling should adapt to the indeterminable lunar environments. Based on the analysis of two types of typical drilling media(i.e., lunar soil and lunar rock), this paper proposes a multi-state control strategy for autonomous lunar drilling. To represent the working circumstances in the lunar subsurface and reduce the complexity of the control algorithm, lunar drilling process was categorized into three drilling states: the interface detection, initiation of drilling parameters for recognition and drilling medium recognition. Support vector machine(SVM) and continuous wavelet transform were employed for the online recognition of drilling media and interface, respectively. Finite state machine was utilized to control the transition among different drilling states. To verify the effectiveness of the multi-state control strategy, drilling experiments were implemented with multi-layered drilling media constructed by lunar soil simulant and lunar rock simulant. The results reveal that the multi-state control method is capable of detecting drilling state variation and adjusting drilling parameters timely under vibration interferences.The multi-state control method provides a feasible reference for the control of extraterrestrial autonomous drilling. | Chen Chongbin Quan Qiquan Shi Xiaomeng Deng Zongquan Tang Dewei Jiang Shengyuan | 2016 | Chinese Journal of Aeronautics2016，29，5： | 3 |
| 7 | A unified theory for sharp dissolution front propagation inchemical dissolution of fluid-saturated porous rocks显示文摘This paper presents a unified theory to deal with when, why and how a sharp acidization dissolution front(ADF), which is represented by the porosity distribution curve, can take place in an acidization dissolution system composed of fluid-saturated porous rocks. The theory contains the following main points:(1) A reaction rate of infinity alone can lead to a sharp ADF of the Stefan-type in the acidization dissolution system. This sharp front is unstable when permeability in the downstream region is smaller than that in the upstream region.(2) For a finite reaction rate, when the acid dissolution capacity number approaches zero,the ADF can have a sharp profile of the Stefan-type either on a much smaller time scale or on a much larger time scale than the dissolution time scale. In the former case, the ADF may become unstable on a much larger time scale than the transport time scale, while in the latter case, it may become unstable if the growth rate of a small perturbation is greater than zero.(3) On the dissolution time scale, even if both the reaction rate is finite and the acid dissolution capacity number approaches zero, the profile of an ADF may not be sharp because it is in a transient state. In this case, not only can an ADF change its profile with time, but also its morphology can grow if the growth rate of a small perturbation is greater than zero. Due to the involvement of both the change rate and the growth rate of the ADF profile, it is necessary to conduct a transient linear stability analysis for determining whether or not a time-dependent ADF is stable in the acidization dissolution system. | ZHAO ChongBin HOBBS Bruce ORD Alison | 2019 | Science China(Technological Sciences)2019，62，1： | 3 |
| 8 | An efficient time-integration method for nonlinear dynamic analysis of solids and structures显示文摘This paper presents an efficient time-integration method for obtaining reliable solutions to the second-order nonlinear dynamic problems in structural engineering. This method employs both the backward-acceleration differentiation formula and the trapezoidal rule, resulting in a self-starting, single step, second-order accurate algorithm. With the same computational effort as the trapezoidal rule, the proposed method remains stable in large deformation and long time range solutions even when the trapezoidal rule fails. Meanwhile, the proposed method has the following characteristics: (1) it is applicable to linear as well as general nonlinear analyses; (2) it does not involve additional variables (e.g. Lagrange multipliers) and artificial parameters; (3) it is a single-solver algorithm at the discrete time points with symmetric effective stiffness matrix and effective load vectors; and (4) it is easy to implement in an existing computational software. Some numerical results indicate that the proposed method is a powerful tool with some notable features for practical nonlinear dynamic analyses. | LIU TianYun LI QingBin ZHAO ChongBin | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，4： | 2 |
| 9 | Transient-state instability analysis of dissolution-timescale reactive infiltration in fluid-saturated porous rocks: Purely mathematical approach显示文摘This paper deals with how the purely mathematical approach can be used to solve transient-state instability problems of dissolution-timescale reactive infiltration(DTRI) in fluid-saturated porous rocks. Three key steps involved in such an approach are:(1) to mathematically derive an analytical solution(known as the base solution or conventional solution) for a quasi-steady state problem of the dissolution timescale, which is viewed as a frozen state of the original transient-state instability problem;(2)to mathematically deduce a group of first-order perturbation partial-differential equations(PDEs) for the quasi-steady state problem;(3) to mathematically derive an analytical solution(known as the perturbation solution or unconventional solution) for this group of first-order perturbation PDEs. Because of difficulty in mathematically solving a transient-state instability problem of DTRI in general cases, only a special case, in which some nonlinear coupling between governing PDEs of the problem can be decoupled, is considered to illustrate these three key steps in this study. The related theoretical results demonstrated that the transient chemical dissolution front can become unstable in the DTRI system of large Zh numbers when the long wavelength perturbations are applied to the system. This new finding may lay the theoretical foundation for developing innovative technique to exploit shale gas resources in the deep Earth. | ZHAO ChongBin HOBBS Bruce ORD Alison | 2020 | Science China(Technological Sciences)2020，63，2： | 2 |
| 10 | Finite element modeling of methane gas migration in coal seams显示文摘 | Zhao Chongbin Valliappan S | 1995 | Computers and Structures1995，55，40： | 1 |
| 11 | Analytical solutions for mining induced horizontal stress in floors of coal mining panels 显示文摘 | Zhao Chongbin Hebblewhite B K Galvin J M | 2000 | Computer Methods in Applied Mechanics and Engineering2000，184，1： | 1 |
| 12 | On the randomness test and its incompleteness 显示文摘 | SHI Hongsong ZHANG Chongbin YANG Yongsheng | 2011 | Jour- nal of Tsinghua University (Sci &Tech)2011，51，10： | 1 |
| 13 | Effects of WC particle size on densification and properties of spark plasma sintered WC-Co cermet显示文摘 | Shixian Zhao Xiaoyan Song Chongbin Wei | 2009 | International Journal of Refractory Metals and Hard Materials2009，27，6： | 1 |
| 14 | Coupling method of finite and infinite elements for strip foundation wave problem 显示文摘 | CHUAN Z CHONGBIN Z | 1987 | Earthquake Engineering and Structural Dynamics1987，15，： | 1 |
| 15 | An upscale theory of particle simulation for two-dimensional quasi-static problems显示文摘 | ZHAO CHONGBIN HOBBS E ORD A | 2007 | International Journal for Numerical Methods in Engineering2007，72，： | 1 |
| 16 | Coupling method of finite and infinite elements for strip foundation wave problems 显示文摘 | Zhang Chuhan Zhao Chongbin | 1987 | Earthquake Engineering & Structural Dynamics1987，15，： | 1 |
| 17 | Coupling method of finite and infinite elements for strip foundation wave problems显示文摘 | Zhang Chuhan Zhao Chongbin | 1987 | Earthquake Engineering and Structural Dynamics1987，15，： | 1 |
| 18 | Two different mathematical schemes for solving chemical dissolution-front instability problems in fluid-saturated rocks显示文摘Chemical dissolution-front instability(CDFI)problems usually involve multiple temporal and spatial scales,as well as multiple processes.A key issue associated with solving a CDFI problem in a fluid-saturated rock is to mathematically establish a theoretical criterion,which can be used to judge the instability of a chemical dissolution-front(CDF)propagating in the fluidsaturated rock.This theoretical paper deals with how two different mathematical schemes can be used to precisely establish such a theoretical criterion in a purely mathematical manner,rather than in a numerical simulation manner.The main distinguishment between these two different mathematical schemes is that in the first mathematical scheme,a curved surface coordinate system is used,while in the second mathematical scheme,a planar surface coordinate system is employed.In particular,all the key mathematical deduction steps associated with using these two different mathematical schemes are described and discussed in great detail.The main theoretical outcomes of this study have demonstrated that(1)two different mathematical schemes under consideration can produce exactly the same theoretical criterion;(2)the main advantage of using the first mathematical scheme is that the interface conditions at the curved interface between the downstream and upstream regions can be easily described mathematically;(3)the main advantage of using the second mathematical scheme is that the first-order perturbation equations of the CDFI problem can be easily described in a purely mathematical manner. | ZHAO ChongBin HOBBS Bruce ORD Alison | 2022 | Science China(Technological Sciences)2022，65，1： | 1 |
| 19 | Structural controls on fluid flow and related mineralization in the Xiangshan uranium deposit,Southern China显示文摘 | Ge Lin Ye Zhou Xiangrong Wei Chongbin Zhao | 2006 | Journal of Geochemical Exploration2006，89，： | 1 |
| 20 | Transient infinite element for seepage problems in infinite media显示文摘 | Chongbin Z Valliappan S | 1993 | Int J for Num and Analy Meth in Geomechanics1993，17，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员