436 research outputs found
Phorbia gemmullata Feng, Liu & Zhou 1984
No full textgemmullata Feng, Liu & Zhou, 1984: 4 (Phorbia). Holotype male with labels: (1) handwritten on white label: “ Erlang Mountain / 80.9.19”; (2) handwritten on white label: “ Phorbia gemmullata sp.nov. ”; (3) printed with handwritten inscriptions on red label: “ TYPE / Phorbia / gemmullata / Feng et al. / 1981 ”. Preservation: pinned; genitalia dissected and mounted on slide. Additional notes: Holotype collected by Guilan Liu and Wenzhao Zeng at Erlang Mountain, Sichuan Province, 2790 meters above sea level. Current name: Phorbia gemmullata Feng, Liu & Zhou, 1984.Published as part of ZHANG, XUFENG & ZHU, WEIBING, 2014, The types of Anthomyiidae (Diptera) in the Shanghai Entomological Museum, Chinese Academy of Science, China, pp. 1-67 in Zootaxa 3756 (1) on page 24, DOI: 10.11646/zootaxa.3756.1.1, http://zenodo.org/record/503313
DIRECT OBSERVATION OF ELEMENTARY STERS IN CHARGE TRANSFER MEDIATED BY SURFACE STATES ON TiO2 ILLUMINATION
No full textSoil water dynamics and deep soil recharge in a record wet year in the southern Loess Plateau of China
No full textTerrestrial water cycles are influenced by hydrologic and textural properties of the deep loess layer in the Loess Plateau. Analyses of soil water profile distributions are needed to understand the regional water cycle processes and to guide agricultural production and sustainability. The objective of this study was to quantify the extent of deep soil water recharge and soil water profile dynamics during 1987-2003, especially in a record wet year of 2003, in common cropping systems in a semiarid-subhumid region of the southern Loess Plateau. The Chinese Ecological Research Network (CERN) site and a long-term rotation experiment site in a flat tableland were selected for this study. Soil moisture profiles were measured by a neutron probe to a depth of 6 m in 2003. The precipitation of 954 mm at the Changwu County Meteorological Station in 2003 was 63.4% higher than the long-term average (584 mm), and was a record high since 1957. Although cropping systems affected deep soil water recharge, the persistent dry soil layer formed between 2- and 3-m depths in croplands, resulting from many years of intensive cropping, was fully replenished in all cropping systems in 2003. Further frequency analysis indicated that the desiccated layer between 2- and 3-m depths would be fully recharged at least once in about 10 years for all existing cropping systems excluding continuous alfalfa. This finding should alleviate concerns about the formation of a permanent deep-soil desiccation layer as well as its potential impact on the long-term sustainability of the existing intensive cropping systems in the region. (C) 2010 Elsevier B.V. All rights reserved
Assessing and regulating the impacts of climate change on water resources in the Heihe watershed on the Loess Plateau of China
No full textClimate change can cause considerable changes in water resources and assessing the potential impacts can provide important information for regional sustainable development. The objectives were to evaluate the possible impacts of climate change during 2010-2039 on water resources (runoff, soil water content, and evapotranspiration) in the Heihe watershed on the Loess Plateau of China and to further explore adaptive measures to cope with the changes. Projections of four climate models (CCSR/NIES, CGCM2, CSIRO-Mk2, and HadCM3) under three emission scenarios (A2, B2, and GGa) were used to estimate future changes in precipitation, maximum and minimum temperature based on Change Factor method. The Soil and Water Assessment Tool (SWAT) was employed to simulate the hydrologic responses to climate changes. The CA-Markov model was used to develop land use scenarios. Compared with the present climate, the climate models predicted a -2.3% to 7.8% change in annual precipitation, 0.7 to 2.2A degrees C rises in maximum temperature, and 1.2 to 2.8A degrees C rises in minimum temperature. Without consideration of land use change, SWAT predicted a -19.8% to 37.0% change for runoff, -5.5% to 17.2% change for soil water content, and 0.1% to 5.9% increase for evapotranspiration during 2010-2039 under all climate scenarios. Though the change of hydrometeorolocial variables are complex, they would possibly increase with great probability, and the hydrological regime would be influenced such as a decrease in runoff in winter months. With land use changes, the projected land use of 2015 would increase soil water content by 4.0% and surface runoff by 5.7% while slightly decrease evapotranspiration by 0.6% compared with the 2000 land use. This result showed that adjustment of land use patterns was capable of regulating water resources and could be used to mitigate the adverse effects of climate change
Guo leng tai ba-nie-lin he jin de xing mao zhuan bian
No full textPh.D.Metallic glass materials have been intensively investigated because of their specific mechanical properties and phase separation in metallic glass has been widely studied due to its important physical principle signification. In particular, despite having a negative heat of mixing, amorphous phase separation has been observed directly in Pd-Ni-P system by Lan, and then Wu has shown that the phase separation was consistent with a spinodal decomposition mechanism by Small angle X-ray scattering (SAXS) technique. Recently, Wu and Lo have demonstrated that the metastable liquid miscibility gap (MLMG) in undercooled molten Pd-Ni-P is arisen from two short range orders (SROs) SROs, one of which is of an icosahedral short-range order while the other one is of an unknown nature. This thesis is an effort for determining the complete metastable liquid miscibility gap in Pd-Ni-P and studying the corresponding crystallization mechanism.First, I will introduce my work on successful determination of complete MLMG by identifying the crystallization morphology of the undercooled molten Pd-Ni-P. The molten Pd-Ni-P inside the MLMG can form an interconnected crystalline structure (called spinodal structure in this thesis) at a temperature range from 773 to 823 K, while alloy outside the MLMG crystallizes into a dendrite and eutectic structure in the same temperature range. Combining the incomplete cross-section of the MLMG at 613 K determined by amorphous phase separation observation and study of the two SROs, it can be concluded that the MLMG is a triangle prism in shape.Next, I will introduce my research on the crystallization behaviors of spinodal Pd-Ni-P at different temperatures. Two crystallization microstructure transitions are observed in the MLMG undercooling range. In the small undercooling range, large wavelength spinodal structure is obtained. In the intermediate undercooling range, spinodal liquids tend to crystallize into a eutectic structure. And in the deeper undercooling, spinodal liquids can crystallize into small wavelength spinodal structure. The spinodal wavelength decreases rapidly with undercooling. By Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) studies, the diffusion ability between the two spinodal liquids and crystal phase grain size can be observed. According to the experiment results, we proposed crystallization mechanisms at different undercooling ranges.近年來，金屬玻璃由於其獨特的力學性能被廣泛關註。金屬玻璃的相分離現象由於其物理原理的重要性也被深入研究，特別是對於擁有負混合熱的合金系統。蘭思在具有負混合熱的Pd-Ni-P體系中觀察到了非晶相分離，吳楨舵通過X射線小角衍射證明非晶相分離來自spinodal分解。近期，吳楨舵和盧彥峰發現Pd-Ni-P體系中存在的亞穩液態混溶間隙是有兩種短程有序結構產生的。其中壹種是二十面體的短程有序結構，另壹種則是未知性質的短程有序結構。本文先通過對結晶形貌的識別確定了完整亞穩液態混溶間隙的形狀。當成分在混溶間隙內的熔融的Pd-Ni-P樣品在773K至823K溫度範圍內結晶時，會得到壹種連續糾纏的晶體結構，在本文中稱為旋結線結構。否則會得到樹枝狀的共融結構。同時，結合了觀察不同成分Pd-Ni-P在613K溫度下是否發生非晶相分離現象所得到的部分混溶間隙截面和兩種短程有序結構的性質，我們認為Pd-Ni-P體系的亞穩液態混溶間隙的形狀是壹個三棱柱。在確認完亞穩液態混溶間隙之後，我們研究了由旋結線分解導致相分離的Pd-Ni-P樣品的結晶行為。我們發現在亞穩液態混溶間隙溫度範圍內存在兩個結晶結構的轉變。在比較小的過冷溫度範圍內，大波長的旋結線結構可以被觀測到。在中間的過冷溫度範圍內，結晶行為逐漸轉變為生長成均勻共晶的結構。在高度過冷溫度範圍內，小波長的旋結線結構可以重新被觀測到。已知過冷溫度得到旋節線結構的體總波長隨過冷度的增大減小。掃描電子顯微鏡和透射電子顯微鏡的研究結果表明兩個旋節線分解液體之間存在的相互擴散能力和晶相顆粒大小幾乎不隨溫度變化。結合實驗結果我們提出了不同冷卻溫度下發生旋節線分解後的Pd-Ni-P合金液體的結晶機制。Zhou, Wenzhao = 過冷態鈀-鎳-磷合金的形貌轉變 / 周文釗.Thesis Ph.D. Chinese University of Hong Kong 2017.Includes bibliographical references (leaves 151-158).Abstracts also in Chinese.Title from PDF title page (viewed on 22, August, 2019).Zhou, Wenzhao = Guo leng tai ba-nie-lin he jin de xing mao zhuan bian / Zhou Wenzhao
Study on monitoring of deep foundation pit with SMW engineering method plus anchor cable retaining structure
No full textPost-occupancy evaluation to improve the clinical laboratory in tertiary hospitals in Shaoxing
Full text linkNowadays, medical technology is developing at high speed, and laboratory medicine has been developed. As a hospital clinical laboratory in vital sectors, the laboratory is getting more and more attention from society. It not only needs to meet the work needs of the inspectors, but also considers the psychological needs of the inspectors. An efficient and clean working environment helps improve the efficiency and work comfort of inspectors. In China, most of the laboratory design does not have efficient circulation planning, and there is no clear functional division, which hinders the space of the laboratory from achieving maximum efficiency. Relatively few researchers have investigated the impact of the physical environment on inspectors.
This research concentrates on the effect of the design of the clinical laboratory to develop an efficient and clean environment for inspectors. A method combining practice and theory is proposed to investigate the spatial and social attributes of the laboratory. According to the design before and after the reconstruction of the same hospital's laboratory, the spatial layout of the laboratory is analyzed and studied to understand the work requirements and work of the inspectors. Based on the spatial syntactic theory, the layout of the laboratory is simulated by measuring the spatial properties of the laboratory plan. The comparative analysis of the results reveals the problems that need to be improved in the laboratory, This study also proposes methods for laboratory improvement and behavioral research, which can be used in other studies. In addition to spatial layout design, architects also need to consider other influencing factors, including the location and orientation of the room and users’ psychology.
Keywords: Clinical laboratory design, Space Syntax, Spatial desig
Post-occupancy evaluation to improve the clinical laboratory in tertiary hospitals in Shaoxing
Full text linkNowadays, medical technology is developing at high speed, and laboratory medicine has been developed. As a hospital clinical laboratory in vital sectors, the laboratory is getting more and more attention from society. It not only needs to meet the work needs of the inspectors, but also considers the psychological needs of the inspectors. An efficient and clean working environment helps improve the efficiency and work comfort of inspectors. In China, most of the laboratory design does not have efficient circulation planning, and there is no clear functional division, which hinders the space of the laboratory from achieving maximum efficiency. Relatively few researchers have investigated the impact of the physical environment on inspectors.
This research concentrates on the effect of the design of the clinical laboratory to develop an efficient and clean environment for inspectors. A method combining practice and theory is proposed to investigate the spatial and social attributes of the laboratory. According to the design before and after the reconstruction of the same hospital's laboratory, the spatial layout of the laboratory is analyzed and studied to understand the work requirements and work of the inspectors. Based on the spatial syntactic theory, the layout of the laboratory is simulated by measuring the spatial properties of the laboratory plan. The comparative analysis of the results reveals the problems that need to be improved in the laboratory, This study also proposes methods for laboratory improvement and behavioral research, which can be used in other studies. In addition to spatial layout design, architects also need to consider other influencing factors, including the location and orientation of the room and users’ psychology.
Keywords: Clinical laboratory design, Space Syntax, Spatial desig
Modeling and Power Quality Assessment in Shipboard Microgrids
Full text linkThis project provides PQ assessment methods for SMGs under both unbalanced and harmonic AC bus voltage conditions. The impact of voltage unbalance combined with harmonics on the SMG behaviors are analyzed, some models and controllable experimental research are proposed and carried out in a real ship under sea-going conditions. The experiments are presented considering real non-linear bow thruster load and high power ballast pump loads at steady and transient conditions. In addition, the transient impact of voltage dips has been carefully analyzed based on maritime standards methods. The research work done proposed modelling methods based on the critical ship system parameters, which can be easily applied for PQ assessment onboard. Moreover, voltage dips caused by pump loads can lead to generator unbalanced fundamental current and harmonic current surges, which also have been analyzed
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