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Environmental effect of vegetation restoration on degraded ecosystem in low subtropical China

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Journal of Environmental Sciences 2003年第4期15卷 514-519页

作者： PENG shao-lin YANG Liu-chun LU hong-fang South China Institute of Botany Chinese Academy of SciencesGuangzhou 510650China.

The environmental effect of degraded ecosystem's vegetation restoration in low subtropical China was studied. Results indicated that the vegetation recovery on degraded lands significantly ameliorates surrounding environment, increases species diversity, improves soil structure, raises soil fertility, enhances productivity, and promotes regional agricultural production and social economic development dramatically. Through the combining engineering and biological measures, the restoration of degraded ecosystem in low subtropical area is possible and economical. The restoration experience in Xiaoliang, Wuhua and other sites are valuable for other degraded subtropical area was introduced.

关键词： vegetation restoration degraded ecosystem low subtropical zone environment impact

Boreal Summer Intraseasonal Oscillation and Its Possible Impact on Precipitation over Southern China in 2019

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Journal of Meteorological Research 2021年第4期35卷 571-582页

作者： Jieli hong zongjian KE Yuan YUAN Xie shao Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081

Based on daily precipitation observation data in China,the intraseasonal oscillation(ISO)features of summer precipitation over southern China in 2019 have been investigated by wavelet and band-pass filtering *** results show that enhanced(suppressed)precipitation occurred over southern China during early(late)boreal *** signals of both 10-20-and 30-60-day ISO in southern China are remarkable,with the amplitude of the10-20-day ISO larger than the 30-60-day ISO in boreal summer *** synergistic effect of the 10-20-and 30-60-day ISO wet phases was found to exert a tremendous influence on persistent heavy precipitation in July 2019,when the amount of precipitation reached its maximum in southern China since *** atmospheric circulation and convection evolution characteristics of both 10-20-and 30-60-day ISO are further *** anomalous low-level anticyclone over the South China Sea is prominently linked to the wet phase of the 10-20-day ISO,whereas an anomalous low-level cyclone over southern China is dominantly associated with the wet phase of the 30-60-day *** events enhance the water vapor convergence and ascending motion over southern ***,the atmospheric circulation that accompanied the synergism of the wet phases of the 10-20-and 30-60-day ISO resulted in persistent heavy precipitation over southern China in July 2019.

关键词： heavy precipitation intraseasonal oscillation(ISO) southern China

Amplitude Oscillations of the Resonant Phenomena in a Frenkel-Kontorova Model with an Incommensurate Structure

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Chinese Physics Letters 2012年第6期29卷 68-71页

作者： YAN Yan-zong WANG Cang-Long shao Zhi-Gang YANG Lei College of Mathematics and Statistics Longdong UniversityQingyang 745000 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 College of Physics and Electronic Engineering and Joint Laboratory of Atomic and Molecular Physics of NWNU&IMP CAS Northwest Normal UniversityLanzhou 730070 Laboratary of Quantum Information Technology Institute of Condensed Matter PhysicsSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006 Department of Physics Lanzhou UniversityLanzhou 730000

Dynamical mode locking phenomena in incommensurate structures of the dc- and ac-driven overdamped FrenkelKontorova model are studied by molecular-dynamics *** is found that the Shapiro steps exhibit significantly different amplitude and frequency dependences from the ones observed in the commensurate *** step widths still oscillate with the amplitude,but the form is no longer Bessel-like,i.e.,the anomaly appears in our *** same type of anomalies is also exhibited by the critical depinning *** oscillatory behavior and the anomalies are also revealed in the ((F),Fac) phase diagram where three phases are *** oscillations are directly correlated with the existence and the stability of interference phenomena in real systems.

关键词： force steps commensurate

Tensile properties and failure analysis of Ti–6Al–4V joints by electron beam welding

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Rare Metals 2016年第6期35卷 450-455页

作者： Xiao-Guang Yang shao-Lin Li hong-Yu Qi School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics

The microstructural and mechanical characterization of electron beam welded joints of forged Ti-6Al- 4V were investigated. Microhardness tests indicate that the hardness of the fusion zone （FZ） is higher than that of the heat-affected zone （HAZ） and base metal. The tensile results show that the mechanical properties of the welded joints are comparable with those of the base metal in terms of static strength and are in accordance with the relationship between microstructure and mechanical properties of welded joints. The ultimate tensile strength of the weld is equal to that of the hourglass joint, which indicates that the mechanical properties of the longitudinal FZ and those of the transverse FZ are the same. Macromechanical behavior and macrofracture and microfracture of the base material, joint, and weld specimens are observed. A comparison among the three types of specimen fracture phenomena reveals the following distinctive differences：（1） the fracture mode, （2） the micrograph of the dimple pattern at the central region, and （3） the size of the dimple at the central region and the transition region.

关键词： Electron beam welding Microstructure Mechanical properties Failure model

The gravitational-wave physics

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National Science Review 2017年第5期4卷 687-706页

作者： Rong-Gen Cai Zhoujian Cao zong-Kuan Guo shao-Jiang Wang Tao Yang CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences Department of Astronomy Beijing Normal University School of Physical Sciences University of Chinese Academy of Sciences Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of Sciences

The direct detection of gravitational wave by Laser Interferometer Gravitational-Wave Observatory indicates the coming of the era of gravitational-wave astronomy and gravitational-wave cosmology. It is expected that more and more gravitational-wave events will be detected by currently existing and planned gravitational-wave detectors. The gravitational waves open a new window to explore the Universe and various mysteries will be disclosed through the gravitational-wave detection, combined with other cosmological probes. The gravitational-wave physics is not only related to gravitation theory, but also is closely tied to fundamental physics, cosmology and astrophysics. In this review article, three kinds of sources of gravitational waves and relevant physics will be discussed, namely gravitational waves produced during the inflation and preheating phases of the Universe, the gravitational waves produced during the first-order phase transition as the Universe cools down and the gravitational waves from the three phases:inspiral, merger and ringdown of a compact binary system, respectively. We will also discuss the gravitational waves as a standard siren to explore the evolution of the Universe.

关键词： gravitational waves inflation reheating first order phase transition binary black holes standard siren

Improved Cellulose Adsorption Method for the Preparation of Perovskite Oxides with Large Specific Surface Area at Low Temperature

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Chinese Chemical Letters 2000年第12期11卷 1103-1106页

作者： zong Ping shao Guang Tao LI Guo Xing XIONG Wei Shen YANG State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesP.O.Box 110Dalian 116023

Perovskite-type La1-xSrxMO3-delta (x=0,0.1,0.2, B=Co,Fe,Mn) oxides were prepared by pyrolysis of metal salt-(organic acid)-cellulose compound precursors. Low calcination temperatures, usually lower than 600 degreesC, were needed. The specific surface area of the as-prepared oxides is higher than that prepared by the cellulose adsorption method, and is comparable to that prepared by sol-gel method. The effective organic acid could be EDTA acid, citric acid or DL-hydroxysuccinic acid, among them, EDTA acid is the best one.

关键词： Cellulose Organic acid Perovskite Surface area Synthesis

Right-and left-sided colorectal cancers respond differently to traditional Chinese medicine

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World Journal of Gastroenterology 2017年第42期23卷 7618-7625页

作者： Shan-Shan Liu Qi Shi hong-Jia Li Wei Yang Su-Su Han shao-Qi zong Wen Li Feng-Gang Hou Oncology Department of Shanghai Municipal Hospital of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine

AIM To explore the differences in the responses of left-sided colorectal cancer(LSCRC) and right-sided colon cancer(RSCC) to traditional Chinese medicine(TCM).METHODS Patients with postoperative stage I-III colorectal cancer(CRC) were enrolled and divided into the LSCRC with or without TCM and RSCC with or without TCM groups depending on the primary tumor side and TCM administration. Patients in the TCM group were given TCM for at least 6 mo. Our research adopted diseasefree survival(DFS) as the primary endpoint. We applied a Cox proportional hazards regression model for the multivariate factor analysis using Stata 12.0 and SPSS 22.0 software for data *** Of the 817 patients included in our study, 617 had LSCRC(TCM group, n = 404; Non-TCM group, n = 213), and 200 had RSCC(TCM group, n = 132; NonTCM group, n = 68). The 6-year DFS for patients with LSCRC was 56.95% in the TCM group and 41.50% in the Non-TCM group(P = 0.000). For patients with RSCC, the 6-year DFS was 52.92% in the TCM group and 37.19% in the Non-TCM group(P = 0.003). Differences between LSCRC and RSCC were not statistically significant regardless of TCM *** Patients with either LSCRC or RSCC and who took TCM experienced longer DFS; furthermore, patients with RSCC benefited more from TCM in DFS.

关键词： Colorectal cancer Left-sided Right-sided Traditional Chinese medicine Disease-free survival

Does back cooling improve human thermal comfort in warm environments?A device for heat conduction by the semiconductor Peltier effect

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Building Simulation 2024年第8期17卷 1253-1271页

作者： Mengyuan He hong Liu Lianggen shao Baizhan Li Yuxin Wu Joint International Research Laboratory of Green Building and Built Environments(Ministry of Education) Chongqing UniversityChongqingChina National Centre for International Research of Low-carbon and Green Buildings(Ministry of Science and Technology) Chongqing UniversityChongqingChina School of Civil Engineering and Architecture Zhejiang Sci-Tech UniversityHangzhouChina

The hot environment and the metabolic heat of commuting in summer caused individual overheating and intense thermal *** cooling presents huge potential for optimizing thermal *** study investigates the performance of a back cooling device,based on the semiconductor Peltier effect,in improving thermal comfort after summer *** studied one case without cooling,and three cases with surface temperatures of the cooling device of 29,27,and 25℃using a simulated summer commute at a moderate activity *** results showed that thermal sensation,perceived sweating rate,and skin temperature decreased markedly in the cooling cases compared to the non-cooling case,with the changes being most notable in the lower back,in contact with the cooling *** decrease in overall thermal sensation and mean skin temperature was approximately 0.52 score and 0.31℃on average,respectively,with a 1.71 score increase in overall thermal *** contend that the surface temperature of local contact cooling devices should not be lower than 22℃to minimize local *** cooling devices present a huge potential for building energy-savings at ambient air temperature exceeding 30℃.Moreover,the functional paradigms for individual comfort predict improved comfort performance in future *** study contributes to the understanding on the well-being and physiological recovery of individuals after a summer commuting.

关键词： back cooling heat conduction summer commuting thermal comfort prediction

Imaging misdiagnosis and clinical analysis of significant hepatic atrophy after bilioenteric anastomosis: A case report

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World Journal of Clinical Cases 2023年第29期11卷 7234-7241页

作者： shao-Yong Liang Jian-Guo Lu zong-Ding Wang Department of Hepatobiliary Surgery Fengjie County People's HospitalChongqing 404600China Department of Radiology Fengjie County People's HospitalChongqing 404600China

BACKGROUND The occurrence of long-term bilioenteric anastomotic stenosis can readily induce liver atrophy and hyperplasia,thereby causing significant alterations in the anatomical and morphological aspects of the *** condition significantly hampers the accuracy of preoperative imaging diagnosis,while also exacerbating the complexity of surgical procedures and the likelihood of *** SUMMARY A 60-year-old female patient was admitted to the hospital presenting with recurring epigastric pain accompanied by a high *** patient had a history of cholecystectomy,although the surgical records were not *** on preoperative imaging and laboratory examination,the initial diagnosis indicated the presence of intrahepatic calculi,abnormal right liver morphology,and acute ***,during the surgical procedure,it was observed that both the left and right liver lobes exhibited evident atrophy and ***,there was a noticeable increase in the volume of the hepatic caudate lobe,and the original bilioenteric anastomosis was *** anastomosis underwent enlargement subsequent to *** a consequence of the presence of remaining stones in the caudate lobe,the second stage was effectively executed utilizing ultrasound-guided percutaneous transhepatic catheter *** the puncture,three days elapsed before the drain tip inadvertently perforated the liver,leading to the development of biliary panperitonitis,subsequently followed by pulmonary *** patient and her family strongly refused operation,and she *** The hepatic atrophy-hypertrophy complex induces notable alterations in the anatomical structure,thereby posing a substantial challenge in terms of imaging diagnosis and surgical ***,the long-term presence of hepatic fibrosis changes heightens the likelihood of complications arising from puncture procedures.

关键词： Hepatic lobe atrophy Acute cholangitis Hepatic atrophy-hypertrophy complex Hepatic calculus Case report