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| 1 | Urban Green Space Planning Based on Computational Fluid Dynamics Model and Landscape Ecology Principle:A Case Study of Liaoyang City,Northeast China显示文摘As a result of environmental degradation,urban green space has become a key issue for urban sustainable development.This paper takes Liaoyang City in Northeast China as an example to develop green space planning using the computational fluid dynamics (CFD) model,landscape ecological principles and Geographical Information System (GIS).Based on the influencing factors of topography,building density and orientation,Shou Mountain,Longding Mountain and the Taizi River were selected as the urban ventilation paths to promote wind and oxygen circulation.Oxygen concentration around the green spaces gradually decreased with wind speed increase and wind direction change.There were obvious negative correlation relationships between the oxygen dispersion concentration and urban layout factors such as the building plot ratio and building density.Comparison with the field measurements found that there was significant correlation relationship between simulated oxygen concentration and field measurements (R 2=0.6415,p<0.001),moreover,simulation precision was higher than 92%,which indicated CFD model was effective for urban oxygen concentration simulation.Only less than 10% areas in Liaoyang City proper needed more green space urgently to improve oxygen concentration,mainly concentrated in Baitai and west Wensheng districts.Based on land-scape ecology principle,green space planning at different spatial scales were proposed to create a green space network system for Liaoyang City,including features such as green wedges,green belts and parks.Totally,about 2012 ha of green space need to be constructed as oxygen sources and ventilation paths.Compared with the current green space pattern,proposed green space planning could improve oxygen concentration obviously.The CFD model and research results in this paper could provide an effective way and theory support for sustainable development of urban green space. | ZHOU Yuan SHI Tiemao HU Yuanman GAO Chang LIU Miao FU Shilei WANG Shizhe | 2011 | Chinese Geographical Science2011，21，4： | 9 |
| 2 | Sediment pollution characteristics and in situ control in a deep drinking water reservoir显示文摘Sediment pollution characteristics, in situ sediment release potential, and in situ inhibition of sediment release were investigated in a drinking water reservoir. Results showed that organic carbon(OC), total nitrogen(TN), and total phosphorus(TP) in sediments increased from the reservoir mouth to the main reservoir. Fraction analysis indicated that nitrogen in ion exchangeable form and Na OH-extractable P(Fe/Al-P) accounted for 43% and 26% of TN and TP in sediments of the main reservoir. The Risk Assessment Code for metal elements showed that Fe and Mn posed high to very high risk. The results of the in situ reactor experiment in the main reservoir showed the same trends as those observed in the natural state of the reservoir in 2011 and 2012; the maximum concentrations of total OC, TN, TP, Fe,and Mn reached 4.42 mg/L, 3.33 mg/L, 0.22 mg/L, 2.56 mg/L, and 0.61 mg/L, respectively. An in situ sediment release inhibition technology, the water-lifting aerator, was utilized in the reservoir. The results of operating the water-lifting aerator indicated that sediment release was successfully inhibited and that OC, TN, TP, Fe, and Mn in surface sediment could be reduced by 13.25%, 15.23%, 14.10%, 5.32%, and 3.94%, respectively. | Zizhen Zhou Tinglin Huang Yang Li Weixing Ma Shilei Zhou Shenghai Long | 2017 | Journal of Environmental Sciences2017，29，2： | 6 |
| 3 | eGPS 1.0: comprehensive software for multi-omic and evolutionary analyses显示文摘It has become increasingly challenging for researchers to analyze the exponentially expanding amount of multi-omic data.Here,we describe multi-functional software named evolutionary GenotypePhenotype Systems(eGPS)that enables users to perform comprehensive multiomic and evolutionary analyses.The eGPS combines the power of cloud computing and the advantage of desktop application,has a user-friendly graphic interface and is highly interactive. | Dalang Yu Lili Dong Fangqi Yan Hailong Mu Bixia Tang Xiao Yang Tao Zeng Qing Zhou Feng Gao Zhonghuang Wang Ziqian Hao Hongen Kang Yi Zheng Hongwei Huang Yuzhang Wei Wei Pan Yaochen Xu Junwei Zhu Shilei Zhao Ciran Wang Pengyu Wang Long Dai Mushan Li Li Lan Yiwei Wang Hua Chen Yi-Xue Li Yun-Xin Fu Zhen Shao Yiming Bao Fangqing Zhao Luo-Nan Chen Guo-Qing Zhang Wenming Zhao Haipeng Li | 2019 | National Science Review2019，6，5： | 4 |
| 4 | High coercivity Nd-Ce-Fe-B nanostructured ribbons prepared from melt spinning technique显示文摘The Ce-substituted(Nd1-xCex)12.2 Fe81.6 B6.2(x=0.0, 0.2, 0.4, 0.6) nanocrystalline ribbons were prepared by annealing amorphous ribbons from melt spinning. It is found that all ribbons are in a multiphase state consisting of a-Fe phase, Nd(Ce)-rich phases and RE2 Fe14 B(RE = Nd, Ce) phases. However, the coercivity of all annealed ribbons can reach a considerably high value without doping any heavy rare earth or other coercivity enhanced elements. A strong intergranular exchange coupling appears in these nanocrystalline ribbons. The Nd12.2 Fe81.6 B6.2 ribbons with multiphase have a coercivity of about 11.3 k Oe, and the coercivity decreases slightly with increasing Ce content. A coercivity of 7.5 kOe can be obtained when60 at% of Nd is replaced by Ce(x = 0.6) due to the grain refinement and the strong intergranular exchange coupling. This provides a practical approach of fabricating high coercivity Ce-substituted Nd-Fe-B materials. | Liang Zha Zhou Liu Hao Chen Mingzhu Xue Guanyi Qiao Shilei Ding Xin Wen Meiling Zhang Youfang Lai Wenyun Yang Jingzhi Han Dong Zhou Chenyao Zhu Jinbo Yang | 2019 | Journal of Rare Earths2019，37，10： | 1 |
| 5 | Remote weak-signal measurement via bound states in optomechanical systems显示文摘A scheme for remote weak-signal sensors is proposed,in which a coupled-resonator optical waveguide(CROW),as a transmitter,couples to a hybrid optomechanical cavity and an observing cavity at its two ends.Non-Markovian theory is employed to study the weak-force sensor by treating the CROW as a non-Markovian reservoir of cavity fields.The dissipationless bound states in the non-Markovian regime are conducive to remotely transmitting a signal in the CROW.Our results show that a sensor with ultrahigh sensitivity can be achieved with the assistance of bound states under certain parameter regimes. | Xun Li Biao Xiong Shilei Chao Chengsong Zhao Hua-Tang Tan Ling Zhou | 2021 | Communications in Theoretical Physics2021，73，2： | 1 |
| 6 | Nonreciprocal ground-state cooling of mechanical resonator in a spinning optomechanical system显示文摘We theoretically present a scheme for nonreciprocal ground-state cooling in a double-cavity spinning optomechanical system which is consisted of an optomechanical resonator and a spinning optical harmonic resonator with directional driving.The optical Sagnac effect generated by the whispering-gallery cavity(WGC)rotation creates frequency difference between the WGC mode,we found that the mechanical resonator(MR)can be cooled to the ground state when the propagation direction of driving light is opposite to the spin direction of the WGC,but not from the other side,vice versa,so that the nonreciprocal cooling is achieved.By appropriately selecting the system parameters,the heating process can be completely suppressed due to the quantum interference effect.The proposed approach provides a platform for quantum manipulation of macroscopic mechanical devices beyond the resolved sideband limit. | Junya Yang Chengsong Zhao Zhen Yang Rui Peng Shilei Chao Ling Zhou | 2022 | Frontiers of physics2022，17，5： | 0 |
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