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| 1 | Water protection in the western semiarid coal mining regions of China: A case study显示文摘The coal industry in China has been moving from the semiarid eastern to the drier western regions since the beginning of this century.Water protection is of the utmost concern for coal mining in these regions.Lu'an,as one of the state coal mining bases in China,has been seeing increasingly heavier pressure for the protection of water resources.This article considers Lu'an as an example and describes the ways these concerns may be alleviated.High mine-water utilization rates have effectively reduced wasting of water and,consequently,have reduced water demand.Using the top layers of the Ordavician as aquifuge barriers can prevent floor karst water inrush into the longwall face and can protect the regional Ordovician karst water resources at the same time.The strength of the overlying Quaternary clay can protect against roof collapse and has successfully preserved the Quaternary porous water resource. | Huang Hanfu Wang Changshen Bai Haibo Wang Zihe | 2012 | International Journal of Mining Science and Technology2012，22，5： | 5 |
| 2 | Synthesis and characterization of oriented linked LiFePO4 nanoparticles with fast electron and ion transport for high-power lithium-ion batteries显示文摘有不同形态学和尺寸的 LiFePO 4 nanoparticles 作为表面活化剂用环境地良性、便宜的甘油经由一个 solvothermal 方法被综合。粒子的形态学,尺寸,和结构被发现仔细联系到甘油的集中。面向非主要连接了 LiFePO 4 nanorods --[010 ] 与甘油的合适的集中被获得。nanorods 显示出好电子、离子的传导性,导致优异的率能力和骑车的性能。这表演非主要被归因于面向的连接[010 ] ,小粒子尺寸沿着[010 ] ,并且在 Fe 地点的李的职业。162.4 | Yi Jiang Ruiyuan Tian Haiqiang Liu Jiankun Chen Xinghua Tan Lina Zhang Guangyao Liu Hanfu Wang Lianfeng Sun Weiguo Chu | 2015 | Nano Research2015，8，12： | 4 |
| 3 | Annular flexible thermoelectric devices with integrated-module architecture显示文摘Organic and composite thermoelectric(TE)materials have witnessed explosive developments in recent years.Design strategy of their flexible devices is vital to achieve high performance and suit various application environments.Here,we propose a design strategy of annular flexible TE devices with integrated-module architecture,where the independent modules made up of alternatively connected p-n couples are connected in series,and then rounded head-to-tail into annular configuration.The achieved devices can not only save plenty of space owing to their highly integrated structure design,but also be directly mounted on cylindrical objects(like pipes)to suit versatile applications.More importantly,the annular TE devices display excellent performances,superior to most previous work and the traditional serial single-layer film structure.For example,the annular device with eight modules consisting of three p-n couples reveals an output power of 12.37μW at a temperature gradient of 18 K,much higher than that of the corresponding single-layer film structure(1.74μW).The integration process is simple and easy to scale up.This architecture design strategy will greatly speed up the TE applications and benefit the research of organic and composite TE materials. | Dawei Qu Xuan Huang Xin Li Hanfu Wang Guangming Chen | 2020 | npj Flexible Electronics2020，4，1： | 3 |
| 4 | Solvent - induced microphase separation in diblock copolymer thin films with reversibly switchable morphology 显示文摘 | Juan Peng Yu Xuan Hanfu Wang | 2004 | J Chem Phys2004，120，11： | 1 |
| 5 | A Wavy-Structured Highly Stretchable Thermoelectric Generator with Stable Energy Output and Self-Rescuing Capability显示文摘Thermoelectric generators(TEGs)demonstrate great potential for flexible and wearable electronics due to the direct electrical energy harvested from waste heat.Good wearability requires high mechanical flexibility and preferable stretchability,while current TEGs are primarily developed with rigid or non-stretchable components,which do not conform well to human skin or accommodate human motions,thus hindering further applications. | Zhuoxin Liu Xiaodong Wang Shasha Wei Haicai Lv Jiaqian Zhou Peng Peng Hanfu Wang Guangming Chen | 2021 | CCS Chemistry2021，3，10： | 1 |
| 6 | Tailoring microstructure and electrical transportation through tensile stress in Bi_(2)Te_(3) thermoelectric fibers显示文摘Bismuth telluride(Bi_(2)Te_(3))has attracted much attention in the field of thermoelectrics since it is one kind of commercial room-temperature thermoelectric material.Herein three kinds of Bi_(2)Te_(3) thermoelectric fibers with internal tensile stress are fabricated utilizing an optical fiber template method.The effects of internal stress on the microstructure and the electrical transportation of Bi_(2)Te_(3) thermoelectric fibers are investigated.The Bi_(2)Te_(3) cores in the fibers are highly crystalline and possess a tensile nanosheet structure with preferential orientation as evidenced by X-ray diffraction and Raman studies.Tensile stress can enhance electrical properties of the fibers.And a paper cup generator covered with 20 pieces of optimized fibers provides a μW-level output power.It is inferred that tensile stress tuning can be an effective tool for the material optimization of thermoelectric performance. | Min Sun Guowu Tang Bowen Huang Zhongjia Chen Yu-Jun Zhao Hanfu Wang Ziwen Zhao Dongdan Chen Qi Qian Zhongmin Yang | 2020 | Journal of Materiomics2020，6，3： | 0 |
| 7 | BEHAVIOR OF STOCHASTIC APPROXIMATIONALGORITHM IN ROOT SET OF REGRESSIONFUNCTION显示文摘By convergence of a stochastic approximation (SA) algorithm one usually means that the distance d(xn, J) between the estimate xn given by the algorithm and the root set J of the regression function tends to zero. This paper characterizes the properties of the limit points of xn. An illustrative example is given to show that xn may move about in J even thought d(xn, J) 0. Finally, the paper gives conditions guaranteeing not only d(xn, J)0 but also the convergence of {xn} itself in the one-dimensional case. | WANG Guanjun CHEN Hanfu (Institute of Systems Science, Academia of Sinica, Beijing 100080, China) | 1999 | Systems Science and Mathematical Sciences1999，12，1： | 0 |
| 8 | CONTINUOUS-TIME KIEFER-WOLFOWITZ ALGORITHM WITH RANDOMIZED DIFFERENCES显示文摘A continuous-time Kiefer-Wolfowitz algorithm with randomized differences andwith truncations at randomly varying bounds is proposed. It is shown that the algorithmconverges to the desired value almost surely under mild conditions. The rate of convergenceand the asymptotic normality of the algorithm are also established. | CHEN Hanfu WANG Qian(Institute Of Systems Science, Academia Silica, Beijing 100080, China) | 1998 | Systems Science and Mathematical Sciences1998，11，4： | 0 |
| 9 | Construction of a cement-rebar nanoarchitecture for a solution-processed and flexible film of a Bi_(2)Te_(3)/CNT hybrid toward low thermal conductivity and high thermoelectric performance显示文摘Solution processability and flexibility still remain major challenges for many thermoelectric(TE)materials,including bismuth telluride(Bi_(2)Te_(3)),a typical and commercially available TE material.Here,we report a new solutionprocessed method to prepare a flexible film of a Bi_(2)Te_(3)/single-walled carbon nanotube(SWCNT)hybrid,where the dissolved Bi_(2)Te_(3) ion precursors are mixed with dispersed SWCNTs in solution and recrystallized on the SWCNT surfaces to form a“cement-rebar”-like architecture.The hybrid film shows an n-type characteristic,with a stable Seebeck coefficient of^(−1)00.00±1.69μVK^(−1) in air.Furthermore,an extremely low in-plane thermal conductivity of∼0.33Wm^(−1) K^(−1) is achieved at 300 K,and the figure of merit(ZT)reaches 0.47±0.02.In addition,the TE performance is independent of mechanical bending.The unique“cement-rebar”-like architecture is believed to be responsible for the excellent TE performances and the high flexibility.The results provide a new avenue for the fabrication of solution-processable and flexible TE hybrid films and will speed up the applications of flexible electronics and energy conversion. | Zhijun Chen Haicai Lv Qichun Zhang Hanfu Wang Guangming Chen | 2022 | Carbon Energy2022，4，1： | 0 |
| 10 | Task scheduling for transport and pick robots in logistics:a comparative study on constructive heuristics显示文摘We study the Transport and Pick Robots Task Scheduling(TPS)problem,in which two teams of specialized robots,transport robots and pick robots,collaborate to execute multi-station order fulfillment tasks in logistic environments.The objective is to plan a collective time-extended task schedule with the minimization of makespan.However,for this recently formulated problem,it is still unclear how to obtain satisfying results efficiently.In this research,we design several constructive heuristics to solve this problem based on the introduced sequence models.Theoretically,we give time complexity analysis or feasibility guarantees of these heuristics;empirically,we evaluate the makespan performance criteria and computation time on designed dataset.Computational results demonstrate that coupled append heuristic works better for the most cases within reasonable computation time.Coupled heuristics work better than decoupled heuristics prominently on instances with relative few pick robot numbers and large work zones.The law of diminishing marginal utility is also observed concerning the overall system performance and different transport-pick robot numbers. | Hanfu Wang Weidong Chen | 2021 | Autonomous Intelligent Systems2021，1，1： | 0 |
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