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215篇 您的检索式:作者名="LENG Huang"
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1Guidelines for evaluation and management of cerebral collateral circulation in ischaemic stroke 2017显示文摘Collateral circulation plays a vital role in sustaining blood flow to the ischaemic areas in acute,subacute or chronic phases after an ischaemic stroke or transient ischaemic attack.Good collateral circulation has shown protective effects towards a favourable functional outcome and a lower risk of recurrence in stroke attributed to different aetiologies or undergoing medical or endovascular treatment.Over the past decade,the importance of collateral circulation has attracted more attention and is becoming a hot spot for research.However,the diversity in imaging methods and criteria to evaluate collateral circulation has hindered comparisons of findings from different cohorts and further studies in exploring the clinical relevance of collateral circulation and possible methods to enhance collateral flow.The statement is aimed to update currently available evidence and provide evidence-based recommendations regarding grading methods for collateral circulation,its significance in patients with stroke and methods under investigation to improve collateral flow.Liping Liu Jing Ding Xinyi Leng Yuehua Pu Li-An Huang Anding Xu Ka Sing Lawrence Wong Xin Wang Yongjun Wang 2018Stroke & Vascular Neurology2018,3,3:37
2Diagnostic value of cancer-testis antigen mRNA in peripheral blood from hepatocellular carcinoma patients显示文摘AIM:To evaluate the diagnostic value of cancer-testis antigen(CTA) mRNA in peripheral blood samples from hepatocellular carcinoma(HCC) patients.METHODS:Peripheral blood samples were taken from 90 patients with HCC before operation.Expression of melanoma antigen-1(MAGE-1),synovial sarcoma X breakpoint-1(SSX-1),and cancer-testis-associated protein of 11 kDa(CTp11) mRNA in peripheral blood mononuclear cells(PBMC) was tested by nested reverse transcriptspolymerase chain reaction(RT-PCR).Serum α-fetoprotein(AFP) in these patients was also determined.RESULTS:The positive rate of MAGE-1,SSX-1 and CTp11 transcripts was 37.7%,34.4%,31.1% in PBMC samples,and 74.4%,73.3%,62.2% in their resected tumor samples,respectively.The positive rate for at least one of the transcripts of three CTA genes was 66.7% in PBMC samples and 91.1% in their resected tumor samples.MAGE-1,SSX-1 and/or CTp11 mRNA were not detected in the PBMC of those patients from whom the resected tumor samples were MAGE-1,SSX-1 and/or CTp11 mRNA negative,nor in the PBMC samples from 20 healthy donors and 10 cirrhotic patients.Among the 90 patients,the serum AFP in 44 patients met the general diagnostic standard(AFP > 400 μg/L) for HCC,and was negative(AFP ≤ 20 μg/L) or positive with a low concentration(20 μg/L < AFP ≤ 400 μg/L) in the other patients.The positive rate for at least one of the transcripts of three CTA genes in PBMC samples from the AFP negative or positive patients with a low concentration was 69.2% and 45.0%,respectively.Of the 90 patients,71(78.9%) were diagnosed as HCC by nested RT-PCR and serum AFP.Although the positive rate for at least one of the transcripts of three CTA genes in PBMC samples from 53 patients at TNM stage or was obviously higher than that in PBMC samples from 37 patients at stage or(77.9% vs 51.4%,P = 0.010),the CTA mRNA was detected in 41.7% and 56.0% of PBMC samples from HCC patients at stages andrespectively.CONCLUSION:Detecting MAGE-1,SSX-1 and CTp11 mRNA in PBMC improves the total diagnostic rate of HCC.Li Zhao Dong-Cheng Mou Zeng-An Wu Ji-Run Peng Lei Huang Xi-Sheng Leng 2010World Journal of Gastroenterology2010,16,32:22
3Total glucosides of paeony attenuates animal psoriasis induced inflammatory response through inhibiting STAT1 and STAT3 phosphorylation显示文摘OBJECTIVE Psoriasis is an immune system meditated disease,especially T cells.It disturbed many people around the world and hard to therapy.Paeonia lactiflora Pall has been used as a medicine in china for thousands of years.Recent studies has found that the main component of Paeonia lactiflora Pall can alleviates the immune response in many diseases.In this study,we researched the effects and possible mechanisms of total glucosides of paeony(TGP)on animal psoriasis in order to study the therapeutic effects and mechanisms of TGP in 5%propranolol creaminduced psoriasis in guinea pigs and Imiquimod(IMQ)cream-induced psoriasis in mice.METHODS The effect of TGP was evaluated using a psoriasis-like model of guinea pigs and mice.Ear thickness was accessed,and pathology injury was observed by HE staining.The levels of serum IL-1β,IL-6,IL-12,IL-17,IL-23,TNF-α,and IFN-γ,skin IL-17A,IL-22 and orphan nuclear receptor(RORγt)mRNA expression,proliferating cell nuclear antigen(PCNA),total or phosphorylated signal transducers and activators of transcription(STAT1 and STAT3)were determined by ELISA,real time PCR,immu⁃nohistochemical staining,and Western blotting,respectively.RESULTS Compared with model group,TGP treatment decreased the ear thickness,improved pathology of psoriasis,alleviated IMQ-induced keratinocyte proliferation,reduced the inflammatory cytokine,and downregulated IL-17A,IL-22,and RORγt mRNA in mice.Further study indicated that TGP inhibited STAT1 and STAT3 phosphorylation in lesion skins of psoriasis-like mice.CONCLUSION TGP alleviates the symptoms of psoriasis-like guinea pigs and mice,and the possible mechanism may relate to inhibit T helper 17(TH17)cell differentiation and keratinocytes proliferation by inhibiting STAT1 and STAT3 phosphorylation.LI Bin-bin HE Shu-cheng LIU Rui HUANG Liang-liang LIU Ge WANG Rui-xuan YANG Zhuo-yue LIU Xin-yi LENG Ye LIU Dan YE Cheng-yu LI Yun-man CHEN Yong-jian IN Hong FANG Wei-rong 2019中国药理学与毒理学杂志2019,33,9:21
4Near-diffraction-limited linearly polarized narrow-linewidth random fiber laser with record kilowatt output显示文摘In this paper, we propose and experimentally investigate a linearly polarized narrow-linewidth random fiber laser(RFL) operating at 1080 nm and boost the output power to kilowatt level with near-diffraction-limited beam quality using a master oscillation power amplifier. The RFL based on a half-opened cavity, which is composed of a linearly polarized narrow-linewidth fiber Bragg grating and a 500 m piece of polarization-maintained Ge-doped fiber, generates a 0.71 W seed laser with an 88 pm full width at half-maximum(FWHM) linewidth and a 22.5 dB polarization extinction ratio(PER) for power scaling. A two-stage fiber amplifier enhances the seed laser to the maximal 1.01 k W with a PER value of 17 dB and a beam quality of M_x^2=1.15 and M_y^2=1.13. No stimulated Brillouin scattering effect is observed at the ultimate power level, and the FWHM linewidth of the amplified random laser broadens linearly as a function of the output power with a coefficient of about 0.1237 pm∕W.To the best of our knowledge, this is the first demonstration of a linearly polarized narrow-linewidth RFL with even kilowatt-level near-diffraction-limited output, and further performance scaling is ongoing.JIANGMING XU LONG HUANG MAN JIANG JUN YE PENGFEI MA JINYONG LENG JIAN WU HANWEI ZHANG PU ZHOU 2017Photonics Research2017,5,4:20
5Age-specific prevalence of human papillomavirus by grade of cervical cytology in Tibetan women显示文摘背景人的乳头状瘤病毒(HPV ) 被相信是最普通的性播送的感染。然而,很少在中国对 HPV 类型的流行和分发被知道。我们试图在居住在 China.Methods A 的西藏的自治区域的女人为反常颈的细胞学象风险一样估计流行和 HPV 类型的分发代表性的学习被执行包含 3036 个女人的一件样品。一张流行病学的问询表被使用,颈的标本为基于液体的细胞学和 HPV DNA 察觉被获得。统计分析在这张人口包括了 chi 平方和逻辑回归 model.Results,(111/3036 )3.66% 有未经决定的意义(子囊) 的不正常的有鳞的房间, 1.45%(44/3036 ) 低档有鳞的 intraepithelial 损害(LSIL ) 并且(33/3036 )1.09% 有高级有鳞的 intraepithelial 损害(HSIL ) 。西藏的女人(5.74% , 137/2387 ) 展出更低的反常细胞学比非西藏的女人评价(8.01% , 52/649, P=0.03 ) 。HPV 感染的全面流行是 9.19%(279/3036 ) 。我们没能到年龄在 HPV 流行识别任何差别。在有正常,子囊, LSIL 和 HSIL 的组,全面 HPV 流行是 7.41%(211/2847 ) , 24.32%(27/111 ) , 56.82%(25/44 ) 并且 45.45%(15/33 ) 分别地。HPV 16 (1.52%,46/3036 ) 是最普通的类型,并且在有子囊的女人也是最流行的(8.11% , 9/111 ) 并且 HSIL (15.15% , 5/33 ) 。为西藏的女人的最普通的 HPV 类型是 HPV 16 (1.42% , 34/2387 ) 而为非西藏的个人它是 HPV 33 (2.31% , 15/649 ) 。279 个感染 HPV 的女人, 40 个个人(14.34%) 与多重 HPV 确实介绍了。有二怀孕的女人是更可能的有反常细胞学油迹(OR=1.67; 95% CI:1.07-2.61 ).Conclusions HPV 确实的低流行在居住在中国的西藏的自治区域的女人被观察。反常颈的细胞学和 HPV 类型分布的流行在西藏、非西藏的女人之间是不同的。JIN Qiong SHEN Keng LI Hui ZHOU Xian-rong HUANG Hui-fang LENG Jin-hua 2010Chinese Medical Journal2010,,15:19
6Emodin, an 11β-hydroxysteroid dehydrogenase type I inhibitor, regulates adipocyte function in vitro and exerts anti-diabetic effect in ob/ob mice显示文摘Yue-jing WANG Su-ling HUANG Ying FENG Meng-meng NING Ying LENG 2012Acta Pharmacologica Sinica2012,33,9:19
7Graphene-based Li-ion hybrid supercapacitors with ultrahigh performance显示文摘有一个成长要求让混合 supercapacitor 系统克服存在产生的精力密度限制电的双层电容器(EDLC ) ,在力量与最小的牺牲导致下 generation-II supercapacitors 密度和周期生活。这里,一个先进基于 graphene 的混合系统,由插入 graphene 的 Li4Ti5O12 (LTO ) 组成合成阳极(G-LTO ) 和三维的多孔的 graphene 蔗糖阴极,为两个都联合 Li 离子电池(精力来源) 和 supercapacitors (力量来源) 的好处的目的被制作了。基于 Graphene 的材料关于混合 supercapacitor 的高效在两个电极起一个重要作用。例如,与 175Kai Leng Fan Zhang Long Zhang Tengfei Zhang Yingpeng Wu Yanhong Lu Yi Huang Yongsheng Chen 2013Nano Research2013,6,8:15
8NLRC5 regulates MHC class I antigen presentation in host defense against intracellular pathogens显示文摘像点头的受体(NLR ) 是对微生物引起的感染在天生的免疫起关键作用的细胞内部的蛋白质的一个家庭。NLRC5, NLR 家庭的最大的成员,最近吸引了许多注意。然而,在 vitro,研究在主人防卫并且在调整有免疫力的发信号的小径关于 NLRC5 的角色报导了不一致的结果。在里面 NLRC5 的 vivo 功能仍然保持未知。这里,我们报导 NLRC5 是对在 vivo 的细胞内部的病原体的主人防卫的一个批评管理者。NLRC5 明确地为涉及 MHC 一级抗原表示的基因的表示被要求。NLRC5 缺乏的老鼠显示了在 MHC 一级基因和伴随物失败的表示的一个深刻缺点激活 L。monocytogenes 特定的 CD8 + T 房间回答,包括的激活,增长和 cytotoxicity,和变异的老鼠更产生病原体感染。调停 NLRP3 的 inflammasome 激活部分也在 NLRC5 缺乏的老鼠被损害。然而, NLRC5 为 NF-κ 的导致病原体的表示是非必需的; B 依赖的支持 inflammatory 基因以及类型我干扰素基因。因此, NLRC5 极其调整 MHC 一级抗原表示控制细胞内部的病原体感染。Yikun Yao Yalong Wang Fuxiang Chen Yin Huang Shu Zhu Qibin Leng Hongyan Wang Yufang Shi Youcun Qian 2012Cell Research2012,22,5:13
9LSD1 coordinates with the SIN3A/HDAC complex and maintains sensitivity to chemotherapy in breast cancer显示文摘Yang Yang Wei Huang Rongfang Qiu Ruiqiong Liu Yi Zeng Jie Gao Yu Zheng Yongqiang Hou Shuang Wang Wenqian Yu Shuai Leng Dandan Feng Yan Wang 2018Journal of Molecular Cell Biology2018,10,4:10
10Aspirin inhibits proliferation of gemcitabine-resistant human pancreatic cancer cells and augments gemcitabine-induced cytotoxicity显示文摘Yan-qiu OU Wen bo ZHU Yan LI Peng-xin QIU Yi-jun HUANG Jun XIE Song-min HE Xiao-ke ZHENG Tian-dong LENG Dong XU Guang-mei YAN 2010Acta Pharmacologica Sinica2010,31,1:9
11Characterization and fine mapping of an early senescence mutant (es-t) in Oryza sativa L.显示文摘An es-t (early senescence-temporary) mutant, produced by ethylene methylsulfonate treatment of strain Nipponbare, was identified in rice. The leaves of es-t appeared yellow at the seedling stage, and had decreased chlorophyll content. Rust spots were found during growth in es-t, especially at the leaf margin and tip. The plants showed a typical early-senescence phenotype at the milky stage. The leaf surface of es-t appeared smoother than wild-type leaves under a scanning electron microscope, because the leaves lack siliceous protuberances around the stoma. Chloroplasts grow abnormally and are filled with many starch grains in es-t. Paraffin section analysis showed that the development of the sclerenchyma cells and vascular bundles were also abnormal in es-t. Genetic analysis indicated that es-t was controlled by a recessive gene, which was finely mapped to a 42-kb interval on chromosome 5. These results will facilitate the positional cloning and functional studies of the gene.YANG YaoLong RAO YuChun LIU HuiJuan FANG YunXia DONG GuoJun HUANG LiChao LENG YuJia GUO LonBiao ZHANG GuangHeng HU Jiang GAO ZhenYu QIAN Qian ZENG DaLi 2011Chinese Science Bulletin2011,56,23:8
12Theory and experimental verification of valveless piezoelectric pump with rotatable unsymmetrical slopes显示文摘A valveless piezoelectric pump with rotatable unsymmetrical slopes is developed in this research.It has the following features:The pump integrates driving and transporting,and it can mix different fluids while transporting them.In this paper,firstly,the design of the valveless piezoelectric pump with rotatable unsymmetrical slopes was proposed,and the single-direction flow principle was explained.Then,the fluid mechanics model of the valveless piezoelectric pump with rotatable unsymmetrical slopes was established.Meanwhile,the numerical simulation of the pump was performed.Finally,the experiments on relationship between the rotation angles of the slope and the flow rates were conducted.The experimental results showed that the maximum flow was 32.32 mL min 1.The maximum relative error between the theoretical results and the experimental ones was 14.59%.For the relationship between rotation angles and flow ratio of two inlets,the relative error between the experimental and theoretical maxima was 3.75%.Thus,the experiments proved the feasibility of the pump design and verified the theory.ZHANG JianHui XIA QiXiao HUANG Yi LENG XueFei HUANG Jun ZHAO ChunSheng 2011Science China(Technological Sciences)2011,54,11:7
13The effects of air temperature and precipitation on the net primary productivity in China during the early 21st century显示文摘Research on how terrestrial ecosystems respond to climate change can reveal the complex interactions between vegetation and climate,net primary productivity (NPP),an important vegetation parameter and ecological indicator,fluctuates within any given ecological environment or regional carbon budget.In this study, spatial interpolation was used to generate a spatial dataset, with 1-km spatial resolution,with meteorological data from 736 observation stations across China.An improved CASA model was used to simulate NPP over the period of 2001-2013 by taking into account land-cover change in every year during the same period.We propose the grid- based spatial patterns and dynamics of annual NPP,annual average temperature,and annual total precipitation based on the model.We also used the model to demonstrate the spatial correlation between NPP,temperature,and pre- cipitation in the study area with special focus on the impact of climate change in the early 21st century.Results showed that the spatial pattern of NPP over all of China is characterized by higher values in the southeast and lower values in the northwest.The spatial pattern of temperature indicates substantial latitudinal differences across the country,and the spatial pattem of precipitation shows a ribbon of decline from the southeast coast to the northwest inland.Most areas show an upward trend in NPP. Temperatures appear to decrease across the country during the global warming hiatus (1998-2008),and are accom- panied by an increase in precipitation over most regions.The correlation between NPP and annual average temperature is weak.Alternatively,NPP and annual total precipitation are positively correlated in northern and central China at a coefficient above 0.64(p <0.01)yet negatively correlated in the eastem parts of the Qinghai- Tibet Plateau and Sichuan Basin.Results can provide useful information for improving parameters for calibra- tion of the terrestrial ecosystem process model.Qianfeng WANG Jingyu ZENG Song LENG Bingxiong FAN Jia TANG Cong JIANGs Yi HUANG Qing ZHANG Yanping QU Wnlin WANG Wei SHUI 2018Frontiers of Earth Science2018,12,4:6
14Functionalized graphene oxide based on p-phenylenediamine as spacers and nitrogen dopants for high performance supercapacitors显示文摘p-Phenylenediamine(PPD)functionalized graphene oxide(GO)materials(PPDG)were prepared through a one-step solvothermal process and their application as supercapacitors(SCs)were studied.The PPD is not only as the spacers to prevent aggregating and restacking of the graphene sheets in the preparing process but also as nitrogen sources to obtain the nitrogen-doped graphene.The structures of PPDG were characterized by Fourier transformed infrared spectroscopy(FT-IR),X-ray diffraction spectroscopy(XRD),Raman spectroscopy and X-ray photoelectron spectroscopy(XPS)and the results show that the nitrogen-doped graphene was achieved with nitrogen content as high as 10.85 at.%.The field emission scanning electron microscopy(FE-SEM)and high resolution transmission electron microscopy(HR-TEM)have confirmed that the morphologies of PPDG were loose layered with less aggregation,indicating that PPD molecules,as spacers,effectively prevent the graphene sheets from restacking during the solvothermal reaction.The special loose textures make PPDG materials exhibit excellent electrochemical performance for symmetric SCs with superior specific capacitance(313 F/g at 0.1 A/g),rate capability and cycling stability.The present synthesis method is convenient and may have potential applications as ultrahigh performance SCs.Yanhong Lu Yi Huang Fan Zhang Long Zhang Xi Yang Tengfei Zhang Kai Leng Mingjie Zhang Yongsheng Chen 2014Chinese Science Bulletin2014,59,16:5
15Copula-based identification of the non-stationarity of the relation between runoff and sediment load显示文摘It is important to identify the non-stationarity in the relation between runoff and sediment load under the backdrop of the changing environment.This relation helps to further understand the mechanisms of runoff and sediment yield.A copula-based method was used to detect possible change points in the relation between runoff and sediment load in the Wei River Basin(WRB),China,where soil erosion is a very severe issue.The modified Mann-Kendall trend test method was applied to obtain the trends of runoff and sediment load spanning 1960-2010 at monthly and annual timescales.Finally,the causes of the identified non-stationarity of the relation between runoff and sediment load were roughly analyzed from the perspective of climate change and human activities.Results indicated that:(1)the runoff and sediment load in the Jinghe and Wei rivers were generally characterized by noticeably decreasing trends at both monthly and annual timescales;(2)both the Jinghe and Wei rivers had a common change point(2002),implying that the stationarity of the relation between runoff and sediment load in the Jinghe and Wei River was invalid;(3)human activities including increasing water consumption and growing application of soil conservation practices are dominant factors resulting in non-stationarity in the relation between runoff and sediment load in the WRB.This study provides a new idea for identifying the non-stationarity of multivariate relation in the hydro-meteorological field under the background of the changing environment.Shengzhi Huang Pei Li Qiang Huang Guoyong Leng 2017International Journal of Sediment Research2017,32,2:5
16Development of the bunch-by-bunch beam current acquisition system at SSRF显示文摘In this paper,we report the development of a bunch-by-bunch beam current acquisition system.Through a waveform-reconstruction algorithm,the system realizes high equivalent sampling rate with a relatively low inherent rate.Based on the EPICS environment,information communication with other systems can be achieved.Preliminary test results in commissioning the SSRF storage ring show that the system can reconstruct the beam waveform of single bunch,providing a convenient and reliable method for the top-up operation in the future.HUANG Siting LENG Yongbin YAN Yingbing 2009Nuclear Science and Techniques2009,20,2:4
17Phase Ⅱ open-label study of recombinant circularly permuted TRAIL as a single-agent treatment for relapsed or refractory multiple myeloma显示文摘Background: Despite the recent development of new therapies, multiple myeloma(MM) remains an incurable disease. Thus, new, efective treatments are urgently needed, particularly for relapsed or refractory MM(RRMM). In an earlier phase I study, a novel form of recombinant human Apo2L/tumor necrosis factor-related apoptosis-inducing ligand(TRAIL) that is currently in clinical development for the treatment of hematologic malignancies, i.e., circularly permuted TRAIL(CPT), was well tolerated at a dose of 2.5 mg/kg per day and showed promising preliminary activity in patients with RRMM. This phase II, open-label, multicenter study further investigated the eicacy and safety of 2.5-mg/kg per day CPT as single-agent therapy for patients with RRMM.Methods: Patients with RRMM were treated once daily with CPT(2.5 mg/kg, intravenously) for 14 consecutive days for each 21-day cycle. Clinical response and toxicity were assessed after each treatment cycle.Results: Twenty-seven patients received CPT. Using the European Group for Blood and Marrow Transplantation criteria, we calculated the overall response rate of 33.3% with 1 near-complete response(n CR) and 8 partial responses(PRs). The clinical beneit rate(48.1%) included 1 nCR, 8 PRs, and 4 minimal responses. The most common treatmentrelated adverse events(TRAEs) were fever, aspartate aminotransferase elevation, alanine aminotransferase elevation, leucopenia, rash, neutropenia, and thrombocytopenia. We graded toxicity using the Common Toxicity Criteria for Adverse Events, version 3.0, and determined that 37.0% of patients had at least 1 grade 3–4 TRAE.Conclusions: CPT as a single agent can elicit a response in patients with RRMM and is well tolerated. Further clinical investigation is warranted.Yun Leng Lugui Qiu Jian Hou Yaozhong Zhao Xuejun Zhang Shifang Yang Hao Xi Zhongxia Huang Ling Pan Wenming Chen 2016Chinese Journal of Cancer2016,35,12:4
18Optical properties and chemical composition of PM_(2.5) in Shanghai in the spring of 2012显示文摘The semi-diurnal mean aerosol mass concentration, chemical composition, and optical properties of PM2.5were investigated in Shanghai during the spring of 2012. Slight pollution was observed during the study period. The average PM2.5 concentration was 64.11 土 22.83(xg/m3. The mean coefficients of extinction,scattering, and absorption at 532 nm were 125.9 士 78.5,91.1 士 56.3,and 34.9 士 23.6 Mm-1, respectively. A relatively low mean single scattering albedo at 532 nm(0.73 士 0.04) and low level of elemental carbon(EC,2.67 士 1.96 |xg/m3) suggested that the light absorption was enhanced due to the internal mixing of the EC.Sulfate contributed the most to aerosol light scattering in Shanghai. The chemical composition of PM2.5was dominated by particulate organic matter, sulfate, nitrate, ammonium, and EC. Anthropogenic sources made a significant contribution to the emission and loading of the particulate pollutants. A relatively good correlation between the aerosol chemical composition and the cloud condensation nuclei(CCN) activation indicated that aerosol chemistry is an important factor that influences the saturated hygroscopicity and growth of the aerosol.Guanghan Huang Tiantao Cheng Renjian Zhang Jun Tao Chunpeng Leng Yunwei Zhang Shuping Zha Deqin Zhang Xiang Li Chunyang Xu 2014Particuology2014,12,2:4
19Projected changes in mean and interannual variability of surface water over continental China显示文摘Five General Circulation Model(GCM) climate projections under the RCP8.5 emission scenario were used to drive the Variable Infiltration Capacity(VIC) hydrologic model to investigate the impacts of climate change on hydrologic cycle over continental China in the 21 st century. The bias-corrected climatic variables were generated for the Fifth Assessment Report of the Intergovernmental Panel on Climate Change(IPCC AR5) by the Inter-Sectoral Impact Model Intercomparison Project(ISIMIP). Results showed much larger fractional changes of annual mean Evapotranspiration(ET) per unit warming than the corresponding fractional changes of Precipitation(P) per unit warming across the country, especially for South China, which led to a notable decrease of surface water variability(P-E). Specifically, negative trends for annual mean runoff up to -0.33%/ year and soil moisture trends varying between -0.02% to -0.13%/year were found for most river basins across China. Coincidentally, interannual variability for both runoff and soil moisture exhibited significant positive trends for almost all river basins across China, implying an increase in extremes relative to the mean conditions. Noticeably, the largest positive trends for runoff variability and soil moisture variability, which were up to 0.41%/year and 0.90%/year, both occurred in Southwest China. In addition to the regional contrast, intra-seasonal variation was also large for the runoff mean and runoff variability changes, but small for the soil moisture mean and variability changes. Our results suggest that future climate change could further exacerbate existing water-related risks(e.g., floods and droughts) across China as indicated by the marked decrease of surface water amounts combined with a steady increase of interannual variability throughout the 21 st century. This study highlights the regional contrast and intra-seasonal variations for the projected hydrologic changes and could provide a multi-scale guidance for assessing effective adaptation strategies for China on a river basin, regional, or as a whole.LENG GuoYong TANG QiuHong HUANG MaoYi HONG Yang Leung L RUBY 2015Science China Earth Sciences2015,58,5:4
20Pheromone Model Selection in Ant Colony Optimization for the Travelling Salesman Problem显示文摘As a meta-heuristic approach,Ant colony optimization(ACO) has many applications.In the algorithm selection of pheromone models is the top priority.Selecting pheromone models that don't suffer negative biases is a natural choice.Specifically for the travelling salesman problem,the first order pheromone is widely recognized.When come across travelling salesman problem,we study the reasons for the success of ant colony optimization from the perspective of pheromone models,and unify different order pheromone models.In tests,we have introduced the concept of sample locations and the similarity coefficient to pheromone models.The first order pheromone model and the second order pheromone model are compared and are further analysed.We illustrate that the second order pheromone model has better global search ability and diversity of population than the former.With appropriate-scale travelling salesman problems,the second order model performs better than the first order pheromone model.LIU Shufen LENG Huang HAN Lu 2017Chinese Journal of Electronics2017,26,2:3
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