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| 1 | Nataf transformation based point estimate method显示文摘Structural probabilistic analysis quantifies the effect of input random variables, such as material proper- ties, geometrical parameters and loading conditions, on the structural responses. The point estimate method (PEM) is a direct and easy-used way to perform the structural probabilistic analysis in practice. In this paper, a novel and efficient point estimate method is proposed for computing the first four statistical moments of structural response which is a function of input random variables. The method adopts Nataf transformation to replace Rosenblatt transformation in conventional point estimate method. Because of the nature of engineering problems and limited statistical data, the joint probability density function (PDF) of all input random variables is hard to acquire, but it must be known in Rosenblatt transformation. A more common case is that the marginal PDF of each random variable and the correlation matrix are available, which just satisfy the service condition of Nataf transformation. Hence the Nataf transformation based point estimate method is particularly suitable for engineering applications. The comparison between the proposed method and the conventional point estimate method shows that (1) they are equivalent when all random variables are mutually independent; (2) if the marginal PDFs and the correlation matrix are known, the conventional PEM cannot be applicable, but the proposed method can give a rational approximation. Finally, the procedure is demonstrated in detail through a simple illustration. | LI HongShuang LU ZhenZhou YUAN XiuKai | 2008 | Chinese Science Bulletin2008，53，17： | 34 |
| 2 | Conditional probability Markov chain simulation based reliability analysis method for nonnormal variables显示文摘Based on fast Markov chain simulation for generating the samples distributed in failure region and saddlepoint approximation(SA) technique,an efficient reliability analysis method is presented to evaluate the small failure probability of non-linear limit state function(LSF) with non-normal variables.In the presented method,the failure probability of the non-linear LSF is transformed into a product of the failure probability of the introduced linear LSF and a feature ratio factor.The introduced linear LSF which approximately has the same maximum likelihood points as the non-linear LSF is constructed and its failure probability can be calculated by SA technique.The feature ratio factor,which can be evaluated on the basis of multiplicative rule of probability,exhibits the relation between the failure probability of the non-linear LSF and that of the linear LSF,and it can be fast computed by utilizing the Markov chain algorithm to directly simulate the samples distributed in the failure regions of the non-linear LSF and those of the linear LSF.Moreover,the expectation and variance of the failure probability estimate are derived.The results of several examples demonstrate that the presented method has wide applicability,can be easily implemented,and possesses high precision and high efficiency. | YUAN XiuKai,LU ZhenZhou & QIAO HongWei School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China | 2010 | Science China(Technological Sciences)2010，53，5： | 8 |
| 3 | Distribution and Ecological Risk Assessment of HCHs and DDTs in Surface Seawater and Sediment of the Mariculture Area of Jincheng Bay,China显示文摘The distribution of hexachlorocyclohexanes(HCHs) and dichlorodiphenyltrichloroethanes(DDTs) in the surface seawater and sediment of Jincheng Bay mariculture area were investigated in the present study. The concentration of total HCHs and DDTs ranged from 2.98 to 14.87 ng L-1 and were < 0.032 ng L-1, respectively, in surface seawater, and ranged from 5.52 to 9.43 and from 4.11 to 6.72 ng g-1, respectively, in surface sediment. It was deduced from the composition profile of HCH isomers and DDT congeners that HCH residues derived from a mixture of technical-grade HCH and lindane whereas the DDT residues derived from technical-grade DDT and dicofol. Moreover, both HCH and DDT residues may mainly originate from historical inputs. The hazard quotient of α-HCH, β-HCH, γ-HCH and δ-HCH to marine species was 0.030, 0.157, 3.008 and 0.008, respectively. It was estimated that the overall probability of adverse biological effect from HCHs was less than 5%, indicating that its risk to seawater column species was low. The threshold effect concentration exceeding frequency of γ-HCH, p,p'-DDD, p,p'-DDE and p,p'-DDT in sediment ranged from 8.3% to 100%, and the relative concentration of the HCH and DDT mixture exceeded their probable effect level in sediment. These findings indicated that the risk to marine benthos was high and potentially detrimental to the safety of aquatic products, e.g., sea cucumber and benthic shellfish. | HU Yanbing SUN Shan SONG Xiukai MA Jianxin RU Shaoguo | 2015 | Journal of Ocean University of China2015，14，2： | 7 |
| 4 | Climatology and seasonal variability of satellite-derived chlorophyll a around the Shandong Peninsula显示文摘The chlorophyll a(Chl a)is an important indicator of marine ecosystems.The spatiotemporal variation of the Chl a greatly aff ects the mariculture and marine ranching in coastal waters of the Shandong Peninsula.In the current study,the climatology and seasonal variability of surface Chl-a concentration around the Shandong Peninsula are investigated based on 16 years(December 2002-November 2018)of satellite observations.The results indicate that the annual mean Chl-a concentration is greater in the Bohai Sea than in the Yellow Sea and decreases from coastal waters to off shore waters.The highest Chl-a concentrations are found in Laizhou Bay(4.2-8.0 mg/m^(3)),Haizhou Bay(4.2-5.9 mg/m^(3))and the northeast coast of the Shandong Peninsula(4.4-5.0 mg/m^(3)),resulting from the combined eff ects of the intense riverine input and long residence time caused by the concave shape of the coastline.The seasonal Chl-a concentration shows a significant spatial variation.The Chl-a concentrations in these three subregions generally exhibit an annual maximum in August/September,due to the combined eff ects of sea surface temperature,river discharge and sea surface wind.In the southeast coast region,however,the Chl-a concentration is lowest throughout the year and reaches a maximum in February with a minimum in July,forced by the seasonal evolution of the Yellow Sea Cold Water and monsoon winds.The interannual Chl-a concentration trends vary among regions and seasons.There are significant increasing trends over a large area around Haizhou Bay from winter to summer,which are mainly caused by the rising sea surface temperature and eutrophication.In other coastal areas,the Chl-a concentration shows decreasing trends,which are clearest in summer and induced by the weakening land rainfall.This study highlights the differences in the Chl-a dynamics among regions around the Shandong Peninsula and is helpful for further studies of coupled physical-ecological-human interactions at multiple scales. | Xiukai SONG Yanzhen GU Fangguo ZHAI Peiliang LI Pengxia LIU Zizhou LIU Wenfan WU Yaozu CHEN Xiangyang JIANG Jianlong HE | 2021 | Journal of Oceanology and Limnology2021，39，4： | 3 |
| 5 | A case of lethal hemolytic anemia associated with severe pneumonia caused by Mycoplasma pneumoniae显示文摘To the editor:A 31-year-old previous healthy male patient was admitted to the hospital with fever (Tmax 41℃) and non-productive cough for seven days and dyspnea for three days.On day 4 after disease onset,his chest X-ray showed right upper lung small opacity and left lung large opacity (Figure 1A).The patient has been administrated levofloxacin for two days before he came into our hospital. | Gu Li Chen Xiukai Li Huiqiao Qu Jiuxin Miao Miao Zhou Fei Zhu Yanyan Wang Xu Wang Chunlei Liu Yingmei Li Wenxiong Cao Bin | 2014 | Chinese Medical Journal2014，，21： | 3 |
| 6 | An atlas of CNV maps in cattle, goat and sheep显示文摘Copy number variation(CNV)is the most prevalent type of genetic structural variation that has been recognized as an important source of phenotypic variation in humans,animals and plants.However,the mechanisms underlying the evolution of CNVs and their function in natural or artificial selection remain unknown.Here,we generated CNV region(CNVR)datasets which were diverged or shared among cattle,goat,and sheep,including 886 individuals from 171 diverse populations.Using 9 environmental factors for genome-wide association study(GWAS),we identified a series of candidate CNVRs,including genes relating to immunity,tick resistance,multi-drug resistance,and muscle development.The number of CNVRs shared between species is significantly higher than expected(P<0.00001),and these CNVRs may be more persist than the single nucleotide polymorphisms(SNPs)shared between species.We also identified genomic regions under long-term balancing selection and uncovered the potential diversity of the selected CNVRs close to the important functional genes.This study provides the evidence that balancing selection might be more common in mammals than previously considered,and might play an important role in the daily activities of these ruminant species. | Yongzhen Huang Yunjia Li Xihong Wang Jiantao Yu Yudong Cai Zhuqing Zheng Ran Li Shunjin Zhang Ningbo Chen Hojjat Asadollahpour Nanaei Quratulain Hanif Qiuming Chen Weiwei Fu Chao Li Xiukai Cao Guangxian Zhou Shudong Liu Sangang He Wenrong Li Yulin Chen Hong Chen Chuzhao Lei Mingjun Liu Yu Jiang | 2021 | Science China(Life Sciences)2021，64，10： | 2 |
| 7 | n-Butane Oxidation over VPO Catalysts Supported on SBA-15 显示文摘 | Li Xiukai Ji Weijie Zhao Jing | 2006 | J Catal2006，238，1： | 1 |
| 8 | A Comparison Study on the Partial Oxidation of n-Butane and Propane over VPO Catalysts Supported on SBA-15, MCM-41, and Fumed SiO2 显示文摘 | Li Xiukai Ji Weijie Zhao Jing | 2006 | ApplCatal A2006，306，： | 1 |
| 9 | A comparison study on the partial oxidation of n -butane and propane over VPO catalysts supported on SBA-15,MCM-41,and fumed SiO 2 显示文摘 | Li Xiukai Ji Weijie Zhao Jing | 2006 | Appl Catal A2006，306，： | 1 |
| 10 | n -Butane oxidation over vanadium phosphorus oxide(VPO) catalysts supported on SBA-15显示文摘 | Li Xiukai Ji Weijie Zhao Jing | 2006 | J Catal2006，238，1： | 1 |
| 11 | Photocatalytic reduction of CO 2 over noble metal-loaded and nitrogen-doped mesoporous TiO 2显示文摘 | Xiukai Li Zongjin Zhuang Wei Li Huiqi Pan | 2012 | Applied Catalysis A General2012，，： | 1 |
| 12 | 2-Pro-panol photodegradation over nitrogen-doped NaNbO3powders under visible-light irradiation显示文摘 | SHI HAIFENG LI XIUKAI HIDEO IWAI | 2009 | Journal ofPhysics and Chemistry of Solids2009，70，6： | 1 |
| 13 | 2-Propanol photodegradation over lead niobates under visible light irradiation显示文摘 | Li Xiukai Tetsuya Kako Ye Jinhua | 2007 | Applied Catalysis A: General2007，326，1： | 1 |
| 14 | Monte Carlo Simulation for Moment Independent Sensi- tivity Analysis显示文摘 | Wei Pengfei Lu Zhenzhou Yuan Xiukai | 2013 | Reliability Engineering & System Safety2013，110，： | 1 |
| 15 | 2-Propanol photodegradation over lead niobates under visible light irradiation显示文摘 | Xiukai Li Tetsuya Kako Jinhua Ye | 2007 | Applied Catalysis A, General2007，，1： | 1 |
| 16 | Sensitivity of Sample for Simulation-Based Reliability Analysis Methods显示文摘In structural reliability analysis,simulation methods are widely used.The statistical characteristics of failure probability estimate of these methods have been well investigated.In this study,the sensitivities of the failure probability estimate and its statistical characteristics with regard to sample,called‘contribution indexes’,are proposed to measure the contribution of sample.The contribution indexes in four widely simulation methods,i.e.,Monte Carlo simulation(MCS),importance sampling(IS),line sampling(LS)and subset simulation(SS)are derived and analyzed.The proposed contribution indexes of sample can provide valuable information understanding the methods deeply,and enlighten potential improvement of methods.It is found that the main differences between these investigated methods lie in the contribution indexes of the safety samples,which are the main factors to the efficiency of the methods.Moreover,numerical examples are used to validate these findings. | Xiukai Yuan Jian Gu Shaolong Liu | 2021 | Computer Modeling in Engineering & Sciences2021，，1： | 1 |
| 17 | Novel Ag2 ZnGeO4 photocatalyst for dye degradation under visible light irradiation显示文摘 | Li Xiukai Ouyang Shuxin Naoki Kikugawa | 2008 | Appl Catal A: General2008，334，： | 1 |
| 18 | Ammonia decomposition over Ru and Ni catalysts supported on fumed SiO2,MCM-41,and SBA-15显示文摘 | Ji Weijie Zhao Jing | 2005 | Journal of Catalysis2005，236，： | 1 |
| 19 | The influence of water-sediment regulation on macrobenthic community structures in the Huanghe River(Yellow River)Estuary during 2012–2016显示文摘To determine if water-sediment regulation has affected macrobenthic community structure in the Huanghe River Estuary,China,macrobenthic samples were collected following regulation events from 2012 to 2016.We identify seven phyla and 138 macrobenthic species from within samples throughout the survey area,over time.Species richness and abundance in 2012 were significantly higher than in 2016.Biomass did not differ significantly during 2012–2016.Dominant species were mostly small polychaetes,with mollusks,arthropods,and echinoderms all being relatively rare.In 2016,dominant species were small polychaetes.MDS reveals macrobenthic communities at all surveyed distances from the estuary to have become the same community structure over time.Shannon-Wiener diversity and Margalef richness indexes trended down over time.CCA reveals the most dominant sediment-dwelling species to prefer lower dissolved oxygen,sulfides,and pH,and sediments with high D50 and low clay content.We speculate that water-sediment regulation has affected seabed communities,particularly Region A in our survey area. | Shaowen Li Fan Li Xiukai Song Mingliang Zhang | 2020 | Acta Oceanologica Sinica2020，39，10： | 1 |
| 20 | Dynamic chromatin architectures provide insights into the genetics of cattle myogenesis显示文摘Background Sharply increased beef consumption is propelling the genetic improvement projects of beef cattle in China.Three-dimensional genome structure is confirmed to be an important layer of transcription regulation.Although genome-wide interaction data of several livestock species have already been produced,the genome structure states and its regulatory rules in cattle muscle are still limited.Results Here we present the first 3D genome data in Longissimus dorsi muscle of fetal and adult cattle(Bos taurus).We showed that compartments,topologically associating domains(TADs),and loop undergo re-organization and the structure dynamics were consistent with transcriptomic divergence during muscle development.Furthermore,we annotated cis-regulatory elements in cattle genome during myogenesis and demonstrated the enrichments of promoter and enhancer in selection sweeps.We further validated the regulatory function of one HMGA2 intronic enhancer near a strong sweep region on primary bovine myoblast proliferation.Conclusions Our data provide key insights of the regulatory function of high order chromatin structure and cattle myogenic biology,which will benefit the progress of genetic improvement of beef cattle. | Jie Cheng Xiukai Cao Xiaogang Wang Jian Wang Binglin Yue Wei Sun Yongzhen Huang Xianyong Lan Gang Ren Chuzhao Lei Hong Chen | 2023 | Journal of Animal Science and Biotechnology2023，14，4： | 0 |
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