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1282篇 您的检索式:作者名="Xiaodong Zhang"
    题名 作者 年代 出处 被引量
1Efficient genome editing in plants using a CRISPR/Cas system显示文摘Zhengyan Feng Botao Zhang Wona Ding Xiaodong Liu Dong-Lei Yang Pengliang Wei Fengqiu Cao Shihua Zhu Feng Zhang Yanfei Mao Jian-Kang Zhu 2013Cell Research2013,23,10:211
2Suppression of tumorigenesis by human mesenchymal stem cells in a hepatoma model显示文摘人的间充质的干细胞(hMSCs ) 装家到肿瘤地点并且禁止肿瘤细胞的生长。很少对内在的分子的机制被知道连接 hMSCs 到肿瘤房间的指向的抑制。在这研究,我们从 hMSCs 用一个动物移植模型,一个合作文化系统和调节媒介在二根人的 hepatoma 房间线(H7402 和 HepG2 ) 上调查了 hMSCs 的效果。当 SCID 老鼠与 H7402 细胞和 Z3 hMSCs 的一个相等的数字被注射时,动物移植研究证明肿瘤形成的潜伏的时间被延长并且肿瘤尺寸更小。当 co 有教养时与 Z3 房间, H7402 细胞增殖减少了,增加的 apoptosis,和 Bcl-2 的表示, c-Myc,原子抗原(PCNA ) 和 survivin 低是的增殖的房间调整了。在有调节媒介的处理源于 Z3 hMSC 文化以后, H4702 房间出现了减少的形成殖民地的能力和减少的增长。Immunoblot 分析证明 beta-catenin, Bcl-2, c-Myc, PCNA 和 survivin 表示是在 H7402 和 HepG2 房间调整的 down。总起来说,我们的调查结果证明 hMSCs 禁止 H7402 和 HepG2 人的肝癌症房间线的恶意的显型,它包括增长,形成殖民地的能力和 oncogene 表示试管内和体内。而且,我们的研究提供表明小径的 Wnt 可以在调停 hMSC 的指向和肿瘤房间抑制有一个角色的证据。Ling Qiao Zhili Xu Tiejun Zhao Zhigang Zhao Mingxia Shi Robert C Zhao Lihong Ye Xiaodong Zhang 2008Cell Research2008,18,4:68
3Focal depth research of earthquakes in China's Mainland: Implication for tectonics显示文摘Focal depth data of earthquakes in China's Mainland are processed and analyzed in this paper, as well as the relationship between the focal depths and large-scale tectonic structures. As a basic parameter for earthquakes, focal depth is used to investigate deep environment of seis-mogenic regions, tectonic backgrounds for concentration and release of seismic energy, the inner crustal deformation and its mechanic features. Depth data of 31282 ML≥2.0 events with 1st class and 2nd class precision in China's Mainland from Jan. 1, 1970 to May 31, 2000 are used to get spatial features of earthquakes distributed with depth and to provide average depth for each grid area throughout China. Researches show that the average depth (D) for all the earthquakes used in this paper is (16±7) km, and (13±6) km and (18±8) km for the events in eastern China and western China, respectively. The area with the deepest focal depth is located in southwest Xinjiang region, near the western and southwestern ends of the TarimZHANG Guomin WANG Suyun LI Li ZHANG Xiaodong MA Hongsheng 2002Chinese Science Bulletin2002,47,12:38
4Evaluation of a granulated formula for the nerve root type and vertebral artery type of cervical spondylosis:a multicenter,single-blind,randomized,controlled,phase Ⅲ clinical trial显示文摘OBJECTIVE:To evaluate the effectiveness and safety of cervical spondylosis formula granules in reducing the symptoms of patients with the nerve root type and the vertebral artery type of cervical spondylosis.METHODS:This was a multicenter, single-blind,randomized, controlled trial.From April 2002 to November 2003, 499 patients were randomly assigned to either the treatment or the control group.The treatment group was orally administered granules prepared with a formula for cervical spondylosis, while the control group was given Jingfukang granules.The treatment course was 1 month for both groups.RESULTS:In patients with the nerve root type of cervical spondylosis, the total effect rate in the treatment group(87.21%) was significantly higher than that in the control group(80.70%, P < 0.01).After the treatment period in both groups, the treatment group had a significantly greater rate of resolution of pain, numbness of the upper limbs, muscle strength of the upper limbs, and fatigue than the control group(all P < 0.05).In patients with the vertebral artery type of cervical spondylosis, the total effect rate in the treatment group(82.07%) was similar to that in the control group(71.21%, P >0.05).After the treatment period in both groups,the treatment group had a significantly greater rate of resolution of weakness of the waist and knees than the control group(P < 0.05).CONCLUSION:The cervical spondylosis formula granules significantly improve numbness, muscle strength, and fatigue, and reduce pain in patients with the nerve root type of cervical spondylosis,and improve the weakness of the waist and knees in patients with the vertebral artery type of cervical spondylosis.Luo Xiaodong Wang Peng Li Zhe Liang De Huang Feng Liu Jinwen Chen Xinyu Hu Guoheng Fang Suting Zhang Huajian 2017Journal of Traditional Chinese Medicine2017,37,2:28
5Toward Wisdom-Evolutionary and Primitive-Concise 6G:A New Paradigm of Semantic Communication Networks显示文摘The sixth generation(6G)mobile networks will reshape the world by offering instant,efficient,and intelligent hyper-connectivity,as envisioned by the previously proposed Ubiquitous-X 6G networks.Such hyper-massive and global connectivity will introduce tremendous challenges into the operation and management of 6G networks,calling for revolutionary theories and technological innovations.To this end,we propose a new route to boost network capabilities toward a wisdom-evolutionary and primitive-concise network(WePCN)vision for the Ubiquitous-X 6G network.In particular,we aim to concretize the evolution path toward the WePCN by first conceiving a new semantic representation framework,namely semantic base,and then establishing an intelligent and efficient semantic communication(IE-SC)network architecture.In the IE-SC architecture,a semantic intelligence plane is employed to interconnect the semantic-empowered physical-bearing layer,network protocol layer,and application-intent layer via semantic information flows.The proposed architecture integrates artificial intelligence and network technologies to enable intelligent interactions among various communication objects in 6G.It features a lower bandwidth requirement,less redundancy,and more accurate intent identification.We also present a brief review of recent advances in semantic communications and highlight potential use cases,complemented by a range of open challenges for 6G.Ping Zhang Wenjun Xu Hui Gao Kai Niu Xiaodong Xu Xiaoqi Qin Caixia Yuan Zhijin Qin Haitao Zhao Jibo Wei Fangwei Zhang 2022Engineering2022,8,1:28
6Metallogenesis related to Mesozoic Granitoids in the Nanling Range, South China and Their Geodynamic Settings显示文摘Affected by the compressive stress from the South-Central (Indo-China) Peninsula, the Indosinianorogenesis, characterized by collision, thrust and uplifting, took place inside the South China Plate during 250?230 Ma.The ages of the Indosinian granitoids in the Nanling Range and vicinity areas are mostly 240?205 Ma, indicating that theywere emplaced in both late collision and post-collision geodynamic environments. No important granite-relatedmetallogenesis occurred in this duration. A post-orogenic setting started at the beginning of the Yanshanian Period, whichcontrolled large-scale granitic magmatism and related metallogenesis. This paper makes the first attempt to divide theYanshanian Period into three sub-periods, i.e. the early, middle and late Yanshanian Periods, based mainly on the featuresof magmatism, especially granitoids and related metallogenesis and their geodynamic environments. The magmaticassociation of the Early Yanshanian (about 185?170 Ma) comprises four categories of magmatism, i.e. basalt, bimodalvolcanics, A-type granite and intraplate high-K calc-alkaline (HKCA) magmatism, which indicates an extension-thinningof lithosphere and upwelling of mantle material to a relative small and local extent. Pb-Zn, Cu and Au mineralizationsassociated with HKCA magmatism represents the first high tide of Mesozoic metallogenesis in the Nanling Range area.During the middle Yanshanian, the lithosphere was subjected to more extensive and intensive extending and thinning, andhence mantle upwelling and basaltic magma underplating caused a great amount of crust remelting granitoids. This periodcan be further divided into two stages. The first stage (170?150 Ma) is represented by large-scale emplacement of crustremelting granites with local tungsten mineralization at its end. The second stage (150?140 Ma) is the most important timeof large-scale mineralizations of non-ferrous and rare metals, e.g. W, Sn, Nb-Ta, Bi, Mo, Be, in the Nanling Range area.The late Yanshanian (140?65 Ma) was generally characterized by full extension and breakup of the lithosphere of SouthChina. However, owing to the influence of the Pacific Plate movement, the eastern part of South China was predominatedby subduction-related compression, which resulted in magmatism of calc-alkaline and shoshonite series and relatedmetallogeneses of Au, Ag, Pb-Zn, Cu and (Mo, Sn), followed by extension in its late stage. In the Nanling Range area, thelate Yanshanian magmatism was represented by granitic volcanic-intrusive complexes and mafic dikes, which aregenetically related to volcanic-type uranium and porphyry tin deposits, and the mobilization-mineralization of uraniumfrom pre-existing Indosinian granites.HUA Renmin CHEN Peirong ZHANG Wenlan YAO Junming LIN Jinfu ZHANG Zhanshi GU Shengyan LIU Xiaodong QI Huawen 2005Acta Geologica Sinica(English Edition)2005,79,6:22
7The implementation of an improved NPML absorbing boundary condition in elastic wave modeling显示文摘在向前当模特儿的有弹性的波浪,吸收边界条件(ABC ) 被用来从模型截断边界减轻不希望得到的思考。完美地匹配的层(PML ) 证明了是最好的可得到的 ABC。然而,传统的切开 PML (SPML ) ABC 有一些严肃的劣势:例如,全球 SPML ABC 要求更多计算记忆,尽管实现是容易的。本地 SPML ABC 的实现也有一些困难,自从边和角落必须被考虑。因为卷绕旋转,传统的非切开的完美地匹配的层(NPML ) ABC 有复杂计算。在这篇论文,基于 ABC 与复杂转移频率的拉长函数(CFS ) 相结合的非切开的完美地匹配的层(NPML ) ,我们为与简单计算方程,小存储器要求,和容易的编程吸收边界条件的 PML 介绍一个新奇数字实现方法。Qin Zhen Lu Minghui Zheng Xiaodong Yao Yao Zhang Cai Song Jianyong 2009Applied Geophysics2009,6,2:21
8Hydrometallurgical purification of metallurgical grade silicon显示文摘The effects of the particle size of ground metallurgical grade silicon (MG-Si), the sort of acids, and the type of stirring on the purified efficiency of MG-Si were investigated. It was found that a particle size less than 0.1 mm was most effective for acid leaching; the extraction yield of impurities was increased by 9% with HF leaching compared with HCl leaching and HNO3 leaching, and increased by 7% with ultrasonic stirring compared with mechanical stirring. The principle of hydrometallurgical purification of metallurgical grade silicon under ultrasonic fields was also discussed.MA Xiaodong ZHANG Jian WANG Tongmin LI Tingju 2009Rare Metals2009,28,3:20
9Modeling spatio-temporal distribution of soil moisture by deep learning-based cellular automata model显示文摘Soil moisture content (SMC) is a key hydrological parameter in agriculture,meteorology and climate change,and understanding of spatio-temporal distributions of SMC in farmlands is important to address the precise irrigation scheduling.However,the hybrid interaction of static and dynamic environmental parameters makes it particularly difficult to accurately and reliably model the distribution of SMC.At present,deep learning wins numerous contests in machine learning and hence deep belief network (DBN) ,a breakthrough in deep learning is trained to extract the transition functions for the simulation of the cell state changes.In this study,we used a novel macroscopic cellular automata (MCA) model by combining DBN to predict the SMC over an irrigated corn field (an area of 22 km^2) in the Zhangye oasis,Northwest China.Static and dynamic environmental variables were prepared with regard to the complex hydrological processes.The widely used neural network,multi-layer perceptron (MLP) ,was utilized for comparison to DBN.The hybrid models (MLP-MCA and DBN-MCA) were calibrated and validated on SMC data within four months,i.e.June to September 2012,which were automatically observed by a wireless sensor network (WSN) .Compared with MLP-MCA,the DBN-MCA model led to a decrease in root mean squared error (RMSE) by 18%.Thus,the differences of prediction errors increased due to the propagating errors of variables,difficulties of knowing soil properties and recording irrigation amount in practice.The sequential Gaussian simulation (s Gs) was performed to assess the uncertainty of soil moisture estimations.Calculated with a threshold of SMC for each grid cell,the local uncertainty of simulated results in the post processing suggested that the probability of SMC less than 25% will be difference in different areas at different time periods.The current results showed that the DBN-MCA model performs better than the MLP-MCA model,and the DBN-MCA model provides a powerful tool for predicting SMC in highly non-linear forms.Moreover,because modeling soil moisture by using environmental variables is gaining increasing popularity,DBN techniques could contribute a lot to enhancing the calibration of MCA-based SMC estimations and hence provide an alternative approach for SMC monitoring in irrigation systems on the basis of canals.SONG Xiaodong ZHANG Ganlin LIU Feng LI Decheng ZHAO Yuguo YANG Jinling 2016Journal of Arid Land2016,8,5:20
10From concept to reality-A review to the primary test stand and its preliminary application in high energy density physics显示文摘Pulsed power technology,whereas the electrical energy stored in a relative long period is released in much shorter timescale,is an efficient method to create high energy density physics(HEDP)conditions in laboratory.Around the beginning of this century,China Academy of Engineering Physics(CAEP)began to build some experimental facilities for HEDP investigations,among which the Primary Test Stand(PTS),a multi-module pulsed power facility with a nominal current of 10 MA and a current rising time~90 ns,is an important achievement on the roadmap of the electro-magnetically driven inertial confinement fusion(ICF)researches.PTS is the first pulsed power facility beyond 10 TW in China.Therefore,all the technologies have to be demonstrated,and all the engineering issues have to be overcome.In this article,the research outline,key technologies and the preliminary HEDP experiments are reviewed.Prospects on HEDP research on PTS and pulsed power development for the next step are also discussed.Jianjun Deng Weiping Xie Shuping Feng Meng Wang Hongtao Li Shengyi Song Minghe Xia Ji Ce An He Qing Tian Yuanchao Gu Yongchao Guan Bin Wei Xianbin Huang Xiaodong Ren Jiakun Dan Jing Li Shaotong Zhou Hongchun Cai Siqun Zhang Kunlun Wang Qiang Xu Yujuan Wang Zhaohui Zhang Guilin Wang Shuai Guo Yi He Yiwei Zhou Zhanji Zhang Libing Yang Wenkang Zou 2016Matter and Radiation at Extremes2016,1,1:19
11Adoptive cell transfer therapy for hepatocellular carcinoma显示文摘Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. This malignancy is associated with poor prognosis and high mortality. Novel approaches for prolonging the overall survival of patients with advanced HCC are urgently needed. The antitumor activities of adoptive cell transfer therapy (ACT), such as strategies based on tumor-infiltrating lymphocytes and cytokine-induced killer cells, are more effective than those of traditional strategies. Currently, chimeric antigen receptor T-cell (CAR-T) immunotherapy has achieved numerous breakthroughs in the treatment of hematological malignancies, including relapsed or refractory lymphoblastic leukemia and refractory large B-cell lymphoma? Nevertheless, this approach only provides a modest benefit in the treatment of solid tumors. The clinical results of CAR-T immunotherapy for HCC that could be obtained at present are limited. Some published studies have demonstrated that CAR-T could inhibit tumor growth and cause severe side effects. In this review, we summarized the current application of ACT, the challenges encountered by CAR-T technology in HCC treatment, and some possible strategies for the future direction of immunotherapeutic research.Renyu Zhang Zhao Zhang Zekun Liu Ding Wei Xiaodong Wu Huijie Bian Zhinan Chen 2019Frontiers of Medicine2019,13,1:17
12Prostate cancer identification: quantitative analysis of T2-weighted MR images based on a back propagation artificial neural network model显示文摘Computer-aided diagnosis(CAD) systems have been proposed to assist radiologists in making diagnostic decisions by providing helpful information. As one of the most important sequences in prostate magnetic resonance imaging(MRI), image features from T2-weighted images(T2WI) were extracted and evaluated for the diagnostic performances by using CAD. We extracted 12 quantitative image features from prostate T2-weighted MR images. The importance of each feature in cancer identification was compared in the peripheral zone(PZ) and central gland(CG), respectively. The performance of the computer-aided diagnosis system supported by an artificial neural network was tested. With computer-aided analysis of T2-weighted images, many characteristic features with different diagnostic capabilities can be extracted. We discovered most of the features(10/12) had significant difference(P<0.01) between PCa and non-PCa in the PZ, while only five features(sum average, minimum value, standard deviation, 10 th percentile, and entropy) had significant difference in CG. CAD prediction by features from T2 w images can reach high accuracy and specificity while maintaining acceptable sensitivity. The outcome is convictive and helpful in medical diagnosis.ZHAO Kai WANG ChengYan HU Juan YANG XueDong WANG He LI FeiYu ZHANG XiaoDong ZHANG Jue WANG XiaoYing 2015Science China(Life Sciences)2015,58,7:16
13Slope spectrum critical area and its spatial variation in the Loess Plateau of China显示文摘斜坡光谱被证明了是在在中国黄土地面的学习揭示 geomorphological 特征的重要方法论。在导出斜坡系列的批评区域的决心是一项不可缺少的任务。与学习区域的尺寸的增加一起,导出的系列越来越同样地正在变得,以便他们的差别能被忽略赞成一个标准。随后,测试尺寸被定义为斜坡光谱批评区域(SSCA ) 。SSCA 是斜坡光谱计算的基础不仅而且到某程度,黄土地势的 geomorphological 开发的思考。高分辨率 DEM 在提取斜坡光谱是重要的。有在北 Shaanxi 省的黄土高原的不同地形区域的一套 48 DEM 为实验被选择。SSCA 的空间分发与一个 geo 统计的分析方法被调查,导致从 6.18 km 2到 35.1 km 2 的价值。主要试验性的结果证明 SSCA 的空间分发与土壤侵蚀紧张的空间分发被相关,到反映地面复杂性的某个程度。斜坡光谱的批评区域从北方介绍 weak-strong-weak 的一个空间变化趋势给南方。四个地面参数,溪谷密度,斜坡偏斜度,地面驱动力(T d ) 和斜坡(求救) 的斜坡,被选择为指示物。在那里存在在 SSCA 和溪谷密度之间的一种好指数的功能关系,地面驱动力(T d ) 和在 SSCA 和斜坡偏斜度之间的一种对数函数关系。斜坡偏斜度增加,和溪谷密度,地面驱动力和求救与增加 SSCA 减少。SSCA 能作为一个区别因素被利用识别黄土地形,因为 SSCA 和黄土地形的进化的空间分布是关联词。从台地跟随黄土地形的进化到溪谷多山的区域,这也证明 SSCA 能代表本地地形的发展度。黄土高原的批评稳定的区域代表黄土地形的开发的度。它的主要意义是稳定的区域的感觉能被用来决定最小的地理单位。TANG Guoan SONG Xiaodong LI Fayuan ZHANG Yong XION-GLiyang 2015Journal of Geographical Sciences2015,25,12:16
14A Numerical Research on a Compressibility-correlated Langtry's Transition Model for Double Wedge Boundary Layer Flows显示文摘新压缩的可能性关联在 Langtry 的本地基于变量的转变模型被介绍在两倍楔吃惊 / 边界层相互作用上调查现象。计算分析与试验性的数据相比被做了在极超音速的双楔边界层上估计墙温度和前缘鼻子半径的影响。laminar 边界层分离发生在第一个斜面上,这被发现了。而且,墙温度和前缘鼻子半径在纽结在分离特征上有显著影响。当使用修改转变模型时,有试验性的数据的计算压力系数分发和边界层侧面的比较证明更好的结果能被完成。ZHANG Xiaodong GAO Zhenghong 2011Chinese Journal of Aeronautics2011,24,3:16
15Hepatitis B virus X protein promotes liver cell proliferation via a positive cascade loop involving arachidonic acid metabolism and p-ERK1/2显示文摘肝炎 B 病毒 X 蛋白质(HBx ) 在 hepatocellular 癌的发展起一个关键作用。这里,我们寻求了识别 HBx 由调停的机制肝房间增长。我们发现那 HBx upregulated cyclooxygenase-2 (COX-2 ) 的层次, 5-lipoxygenase (5 哈鱼) 和 phosphorylated 在肝房间的细胞外的调整信号的蛋白质 kinases 1/2 (p-ERK1/2 ) 。导致 HBx 的 p-ERK1/2 被 Gi/o 蛋白质,艇长或哈鱼的抑制废除。另外, HBx 增加了前列腺素 E2 (PGE2 ) 的数量,免除房间线的 leukotriene B4 (LTB4 ) 源于 hepatocytes。而且,这些释放 arachidonic 酸代谢物能激活 ERK1/2。有趣地,激活 ERK1/2 能 upregulate 以一种积极反馈方式的 COX-2 和 5 哈鱼的表示。在结论, HBx 经由包含 COX-2, 5 哈鱼,释放 arachidonic 酸代谢物, Gi/o 蛋白质和 p-ERK1/2 的一个积极反馈环提高并且维持肝房间增长。Changliang Shan Fuqing Xu Shuai Zhang Jiacong YOU Xiaona You Liyan Qiu Jie Zheng Lihong Ye Xiaodong Zhang 2010Cell Research2010,20,5:15
16Integrating TM and Ancillary Geographical Data with Classification Trees for Land Cover Classification of Marsh Area显示文摘The main objective of this research is to determine the capacity of land cover classification combining spec- tral and textural features of Landsat TM imagery with ancillary geographical data in wetlands of the Sanjiang Plain, Heilongjiang Province, China. Semi-variograms and Z-test value were calculated to assess the separability of grey-level co-occurrence texture measures to maximize the difference between land cover types. The degree of spatial autocorrelation showed that window sizes of 3×3 pixels and 11×11 pixels were most appropriate for Landsat TM im- age texture calculations. The texture analysis showed that co-occurrence entropy, dissimilarity, and variance texture measures, derived from the Landsat TM spectrum bands and vegetation indices provided the most significant statistical differentiation between land cover types. Subsequently, a Classification and Regression Tree (CART) algorithm was applied to three different combinations of predictors: 1) TM imagery alone (TM-only); 2) TM imagery plus image texture (TM+TXT model); and 3) all predictors including TM imagery, image texture and additional ancillary GIS in- formation (TM+TXT+GIS model). Compared with traditional Maximum Likelihood Classification (MLC) supervised classification, three classification trees predictive models reduced the overall error rate significantly. Image texture measures and ancillary geographical variables depressed the speckle noise effectively and reduced classification error rate of marsh obviously. For classification trees model making use of all available predictors, omission error rate was 12.90% and commission error rate was 10.99% for marsh. The developed method is portable, relatively easy to im- plement and should be applicable in other settings and over larger extents.NA Xiaodong ZHANG Shuqing ZHANG Huaiqing LI Xiaofeng YU Huan LIU Chunyue 2009Chinese Geographical Science2009,19,2:14
17Modeling the climate effects of different subregional uplifts within the Himalaya-Tibetan Plateau on Asian summer monsoon evolution显示文摘Considering the different uplifting time of different subregions of the Himalaya-Tibetan Plateau(TP),a series of numerical simulations have been conducted with the Community Atmosphere Model(CAM4) developed at the National Center for Atmospheric Research to explore the effects of the phased tectonic uplift of the Himalaya-TP on the evolution of Asian summer monsoons.The results show that the uplifts of the Himalaya and northern TP significantly affect the evolutions of South Asian summer monsoon and northern East Asian summer monsoon respectively.That is,the tectonic uplift of the Himalaya intensifies the South Asian summer monsoon circulation and increases the precipitation in South Asia,whereas the uplift of the northern TP intensifies the northern East Asian summer monsoon circulation and increases the precipitation in northern East Asia.Compared with previous simulations,current comparative analyses of modeling results for different subregional uplifts within the Himalaya-TP help deepen our understanding of the evolutionary history of Asian monsoons.ZHANG Ran 1,JIANG DaBang 1,2,3,LIU XiaoDong 4 & TIAN ZhiPing 2,5 1 Climate Change Research Center,Chinese Academy of Sciences,Beijing 100029,China 2 Nansen-Zhu International Research Centre,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 3 Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Chinese Academy of Sciences,Beijing 100029,China 4 State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,China 5 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 2012Chinese Science Bulletin2012,57,35:14
18Rapid aerobic granulation in an SBR treating piggery wastewater by seeding sludge from a municipal WWTP显示文摘Aerobic sludge granulation was rapidly obtained in the erlenmeyer bottle and sequencing batch reactor(SBR) using piggery wastewater.Aerobic granulation occurred on day 3 and granules with mean diameter of 0.2 mm and SVI_(30) of 20.3 mL/g formed in SBR on day 18.High concentrations of Ca and Fe in the raw piggery wastewater and operating mode accelerated aerobic granulation,even though the seed sludge was from a municipal wastewater treatment plant(WWTP).Alpha diversity analysis revealed Operational Taxonomic Units,Shannon,ACE and Chao 1 indexes in aerobic granules were 2013,5.51,4665.5 and 3734.5,which were obviously lower compared to seed sludge.The percentages of major microbial communities,such as Protect)acteria,Bacteroidetes and Firmicutes were obviously higher in aerobic granules than seed sludge.Chlorqflexi,Planctomycetes,Actinobactena,TM7 and Aridobacteria showed much higher abundances in the inoculum.The main reasons might be the characteristics of raw piggery wastewater and granule structure.Jun Liu Jun Li Xiaodong Wang Qi Zhang Helen Littleton 2017Journal of Environmental Sciences2017,29,1:14
19Identification and standardization of maneuvers based upon operational flight data显示文摘To find a way of loads analysis from operational flight data for advanced aircraft,maneuver identification and standardization jobs are conducted in this paper. For thousands of sorties from one aircraft, after studying the flight attitude when performing actions, the start and end time of the maneuvers can be determined. According to those time points, various types of maneuvers during the flight are extracted in the form of multi-parameters time histories. By analyzing the numerical range and curve shape of those parameters, a characteristic data library is established to model all types of maneuvers. Based on this library, a computer procedure using pattern-recognition theory is programmed to conduct automatic maneuver identification with high accuracy. In that way, operational loads are classified according to maneuver type. For a group of identified maneuvers of the same type, after the processes of time normalization, trace shifting, as well as averaging and smoothing, the idealization standard time history of each maneuver type is established.Finally, the typical load statuses are determined successfully based on standard maneuvers. The proposed method of maneuver identification and standardization is able to derive operational loads effectively, and might be applied to monitoring loads in Individual Aircraft Tracking Program(IATP).Wang Yongjun Dong Jiang Liu Xiaodong Zhang Lixin 2015Chinese Journal of Aeronautics2015,28,1:13
20Achieve Personalized Anonymity Through Query Blocks Exchanging显示文摘In cyberspace security,the privacy in location-based services(LBSs) becomes more critical. In previous solutions,a trusted third party(TTP) was usually employed to provide disturbance or obfuscation,but it may become the single point of failure or service bottleneck. In order to cope with this drawback,we focus on another important class,establishing anonymous group through short-range communication to achieve k-anonymity with collaborative users. Along with the analysis of existing algorithms,we found users in the group must share the same maximum anonymity degree,and they could not ease the process of preservation in a lower one. To cope with this problem,we proposed a random-QBE algorithm to put up with personalized anonymity in user collaboration algorithms,and this algorithm could preserve both query privacy and location privacy. Then we studied the attacks from passive and active adversaries and used entropy to measure user's privacy level. Finally,experimental evaluations further verify its effectiveness and efficiency.Chunguang Ma Lei Zhang Songtao Yang Xiaodong Zheng Pinhui Ke 2016China Communications2016,13,11:13
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