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A new generic open pit mine planning process with risk assessment ability

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International Journal of Coal Science & Technology 2016年第4期3卷 407-417页

作者： Ngoc Luan mai Oktay Erten Erkan Topal Westem Australian School of Mines Curtin University of Technology Bentley WA 6102 Australia Nazarbayev University Astana Kazakhstan

Conventionally, mining industry relies on a deterministic view, where a unique mine plan is determined based on a single resource model. A major shortfall of this approach is the inability to assess the risk caused by the well-known geological uncertainty, i.e. the in situ grade and tonnage variability of the mineral deposit. Despite some recent attempts in developing stochastic mine planning models which have demonstrated promising results, the industry still remains sceptical about this innovative idea. With respect to unbiased linear estimation, kriging is the most popular and reliable deterministic interpolation technique for resource estimation and it appears to remain its popularity in the near future. This paper presents a new systematic framework to quantify the risk of kriging-based mining projects due to the geological uncertainties. Firstly, conditional simulation is implemented to generate a series of equally-probable orebody realisations and these realisations are then compared with the kriged resource model to analyse its geological uncertainty. Secondly, a production schedule over the life of mine is determined based on the kriged resource model. Finally, risk profiles of that production schedule, namely ore and waste tonnage production, blending grade and Net Present Value （NPV）, are constructed using the orebody realisations. The proposed model was applied on a multi-element deposit and the result demonstrates that that the kriging-based mine plan is unlikely to meet the production targets. Especially, the kriging-based mine plan overestimated the expected NPV at a magnitude of 6.70% to 7.34% （135 M$ to 151 M$）. A new multivariate conditional simulation framework was also introduced in this paper to cope with the multivariate nature of the deposit. Although an iron ore deposit is used to prove the concepts, the method can easily be adapted to other kinds of mineral deposits, including surface coal mine.

关键词： Open pit mine planning geological uncertainty Multivariate conditional simulation grade/tonnage curves

New Tripartite Nonlinear Entangled State Representation in Quantum Mechanics

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Communications in Theoretical Physics 2008年第10期50卷 867-872页

作者： KUANg mai-Hua MA Shan-Jun LIU Dong-Mei College of Physics ＆ Communication Electronics Jiangxi Normal University Nanchang 330022 China

Based on the technique of integral within an ordered product of nonlinear bosonic operators,we constructa new kind of tripartite nonlinear entangled state |α,γ〉_λ in 3-mode Fock space,which can make up a complete ... 详细信息

关键词： nonlinear 3-mode entangled state

Pathological conditions re-shape physiological Tregs into pathological Tregs

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Burns & Trauma 2015年第1期3卷 10-20页

作者： William y yang ying Shao Jahaira Lopez-Pastrana Jietang mai Hong Wang Xiao-feng yang Centers for Metabolic Disease Research Cardiovascular Researchand Thrombosis ResearchDepartment of PharmacologyTemple University School of MedicineMERB 10593500 North Broad StreetPhiladelphiaPA 19140USA Department of Microbiology and Immunology Temple University School of MedicinePhiladelphiaPA 19140USA

CD4^(+)FOXP3^(+)regulatory T cells(Tregs)are a subset of CD4 T cells that play an essential role in maintaining peripheral immune tolerance,controlling acute and chronic inflammation,allergy,autoimmune diseases,and anti-cancer immune *** the past 20 years,a significant progress has been made since Tregs were first characterized in *** concepts and principles regarding Tregs generation,phenotypic features,subsets(tTregs,pTregs,iTregs,and iTreg35),tissue specificity(central Tregs,effector Tregs,and tissue resident Tregs),homeostasis(highly dynamic and apoptotic),regulation of Tregs by receptors for PAMPs and DAMPs,Treg plasticity(re-differentiation to other CD4 T helper cell subsets,Th1,Th2,Tfh,and Th17),and epigenetic regulation of Tregs phenotypes and functions have been *** this concise review,we want to briefly analyze these eight new progresses in the study of *** have also proposed for the first time a novel concept that“physiological Tregs”have been re-shaped into“pathological Tregs”in various pathological *** of the improvement in our understanding on this important cellular component about the immune tolerance and immune suppression would lead to the future development of novel therapeutics approaches for acute and chronic inflammatory diseases,allergy,allogeneic transplantation-related immunity,sepsis,autoimmune diseases,and cancers.

关键词： Regulatory T cells Immune suppression Epigenetic mechanisms Histone modifications Metabolic cardiovascular diseases

Diffusion Dynamics of Cux Cluster on Cu（111） Surface

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Chinese Journal of Chemical Physics 2008年第1期21卷 27-31页

作者： Jian-feng Tang mai-chang Xu Xue-song Li Wo-yun Long Department of Applied Physics Hunan Agricultural University Changsha 410128 China Department of Maths and Physics Hunan Institute of Engineering Xiangtan 411104 China

The diffusion dynamics of small two-dimensional atomic clusters Cux （1≤x≤8） on Cu（lll） surface were studied using the molecular dynamics simulations and a modified analytic embedded-atom method in the temperature range from 200 K to 800 K. The cluster size and temperature dependence of the diffusion coefficients and migration energies are presented. Our simulations show that the diffusion migration energy of the CuT cluster is the highest and the prefactor for the CuT cluster is almost three orders of magnitude larger than that for single atom diffusion. This conclusion is consistent with the experimental results for similar metals. In addition, the dependence of cluster diffusion on film growth is also discussed.

关键词： Cluster Molecular dynamics Surface diffusion

A Linear Perturbed Palais-Smale Condition for Lower Semicontinuous Functions on Banach Spaces

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Acta Mathematica Sinica,English Series 2008年第11期24卷 1853-1860页

作者： Li Xing CHENg Xiao yan LIU mai Fang ZUO Department of Mathematics Xiamen University Xiamen 361005 P. R. China

This paper introduces a notion of linear perturbed Palais-Smale condition for real-valued functions on Banach spaces. In terms of strongly exposed points, it presents a characterization which guarantees linear perturbed Palais-Smale condition holds for lower semicontinuous functions with bounded effective domains defined on a Banach space with the Radon-Nikody＇m property; and gives an example showing that linear perturbed P-S condition is strictly weaker than the P-S condition.

关键词： Palais-Smale condition variational question perturbed optimization Radon-Nikody'm property Banach space

geometric phase opens new frontiers in nonlinear frequency conversion of light

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Frontiers of physics 2022年第1期17卷 1-5页

作者： mai Tal Danielle Ben Haim Tal Ellenbogen Department of Physical Electronics Faculty of EngineeringTel-Aviv UniversityTel-Aviv6779801Israel Raymond and Beverly Sackler School of Physics and Astronomy Tel-Aviv UniversityTel-Aviv6779801Israel Center for Light-Matter Interaction Tel-Aviv UniversityTel-Aviv6779801Israel

Nonlinear frequency conversion of light involves in-teraction of photons through the nonlinear dielec-tric response of mat erials to genera te light at new *** first demonstration of nonlinear optical frequency conver... 详细信息

关键词： nonlinear light frontier

Heuristic and Bent Key Exchange Secured Energy Efficient Data Transaction for Traffic Offloading in Mobile Cloud

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Computers, Materials & Continua 2020年第12期65卷 1925-1943页

作者： Nithya Rekha Sivakumar Sara ghorashi Mona Jamjoom mai Alduaili Computer Science Department College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia

In today’s world,smart phones offer various applications namely face detection,augmented-reality,image and video processing,video gaming and speech *** the increasing demand for computing resources,these applications become more *** Computing(CC)environment provides access to unlimited resource pool with several features,including on demand self-service,elasticity,wide network access,resource pooling,low cost,and ease of *** Cloud Computing(MCC)aimed at overcoming drawbacks of smart phone *** task remains in combining CC technology to the mobile devices with improved battery life and therefore resulting in significant *** remote execution,recent studies suggested downloading all or part of mobile application from mobile *** the other hand,in offloading process,mobile device energy consumption,Central Processing Unit(CPU)utilization,execution time,remaining battery life and amount of data transmission in network were related to one or more constraints by frameworks *** address the issues,a Heuristic and Bent Key Exchange(H-BKE)method can be considered by both ways to optimize energy consumption as well as to improve security during ***,an energy efficient offloading model is designed using Reactive Heuristic Offloading algorithm where,the secondary users are allocated with the unused primary users’***,a novel AES algorithm is designed that uses a Bent function and Rijndael variant with the advantage of large block size is hard to interpret and hence is said to ensure security while accessing primary users’unused spectrum by the secondary *** are conducted for efficient offloading in mobile cloud and performance valuations are carried on the way to demonstrate that our projected technique is successful in terms of time consumption,energy consumption along with the security aspects covered during offloading in MCC.

关键词： Cloud computing mobile cloud computing heuristic bent key exchange reactive offloading

Metal-organic frameworks enable broad strategies for lithium-sulfur batteries

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National Science Review 2021年第12期8卷 104-121页

作者： Cheng Zhou Zhaohuai Li Xu Xu Liqiang mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology International Schoo of Materials Science and Engineering Wuhan University of Technology Foshan Xianhu Laboratory of the Advanced Energy Science and Technology guangdong Laboratory

The lithium-sulfur(Li-S) battery is considered to be a potential next-generation power battery system,however, it is urgent that suitable materials are found in order to solve a series of challenges, such as the shuttle effect and lithium dendrite growth. As a multifunctional porous material, metal-organic frameworks(MOFs) can be used in different parts of Li-S batteries. In recent years, the application of MOFs in Li-S batteries has been developed rapidly. This review summarizes the milestone works and recent advances of MOFs in various aspects of Li-S batteries, including cathode, separator and electrolyte. The factors affecting the performance of MOFs and the working mechanisms of MOFs in these different parts are also discussed in detail. Finally, the opportunities and challenges for the application of MOFs in Li-S batteries are proposed. We also put forward feasible solutions to related problems. This review will provide better guidance for the rational design of novel MOF-based materials for Li-S batteries.

关键词： metal-organic frameworks lithium-sulfur batteries cathode separator electrolyte

Kinetics of methanol steam reforming over COPZr-2 catalyst

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Journal of Natural gas Chemistry 2008年第2期17卷 171-174页

作者： yongfeng Li Weiming Lin Lin yu Zhifeng Hao Rongjian mai Faculty of Chemical Engineering and Light lndustry Guangdong University of Technology Guangzhou 510006 Guangdong China Sehool of Chemical and Energy Engineering South China University of Technology Guangzhou 510640 Guangdong China

The COPZr-2 catalyst, which was prepared in our prophase research, showed good catalytic performance in methanol steam reforming reaction. In this article, the best one was chosen as an example to study the reaction kinetics of methanol steam reforming over this type of catalyst. First, the effects of methanol conversion to outlet CO2 and methanol conversion to outlet CO on methanol pseudo contact time W/FMeOH were investigated. Then by applying the reaction route that methanol direct reforming （DR） and methanol decomposition （DE） were carried out in parallel, the reaction kinetic model with power function type was established. And the parameters for the model were estimated using a non-linear regression program which computed weighted least squares of the defined objects function. Finally, the kinetic model passed the correlation test and the F-test.

关键词： methanol reforming kinetics COPZr-2