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| 1 | A Novel Single Phase Grounding Fault Protection Scheme Without Threshold Setting for Neutral Ineffectively Earthed Power Systems显示文摘The setting values of thresholds for fault feature parameters are critical in all kinds of protection schemes.When the detected feature parameter value exceeds the setting value,the protection will trip.However,the setting value based conventional protection schemes sometimes cannot satisfy the protection requirements of neutral ineffectively earthed power systems(NIEPS)due to wide variations in operating conditions and the complexities of fault cases.In this paper,a novel single phase grounding fault protection scheme without threshold setting is proposed.The fault detection is achieved based on operating states rather than setting values.A fuzzy c-means algorithm is used to divide the operating state of the protected feeder into non-fault states and fault states.The cluster center of each state is then obtained by classifying the historical feature samples of the protected feeder extracted under various operating conditions into their corresponding states in a constructed multi-dimensional fault feature space.The distances between the detected feature samples and the cluster centers of the non-fault and the fault states are calculated.If the distance to the fault state is shorter than that to the non-fault state,a fault is detected.Otherwise,the feeder is considered normal.A PSCAD/EMTDC simulator is used to simulate a 35 kV NIEPS under various operating conditions,non-linear loads,and complex fault cases.Results show that the proposed single phase grounding fault protection scheme without threshold setting can protect the system correctly under all kinds of faults. | Xiangjun Zeng Kun Yu Yuanyuan Wang Yao Xu | 2016 | CSEE Journal of Power and Energy Systems2016，2，3： | 9 |
| 2 | The Chinese carbon cycle data-assimilation system(Tan-Tracker)显示文摘In this study,the Chinese carbon cyle dataassimilation system Tan-Tracker is developed based on the atmospheric chemical transport model(GEOS-Chem)platform.Tan-Tracker is a dual-pass data-assimilation system in which both CO2concentrations and CO2fluxes are simultaneously assimilated from atmospheric observations.It has several advantages,including its advanced data-assimilation method,its highly efficient computing performance,and its simultaneous assimilation of CO2concentrations and CO2fluxes.Preliminary observing system simulation experiments demonstrate its robust performance with high assimilation precision,making full use of observations.The Tan-Tracker system can only assimilate in situ observations for the moment.In the future,we hope to extend Tan-Tracker with functions for using satellite measurements,which will form the quasioperational Chinese carbon cycle data-assimilation system. | Xiangjun Tian Zhenghui Xie Zhaonan Cai Yi Liu Yu Fu Huifang Zhang | 2014 | Chinese Science Bulletin2014，59，14： | 7 |
| 3 | Establishment Method of a Mixture Model and Its Practical Application for Transmission Gears in an Engineering Vehicle显示文摘Highly versatile machines, such as wheel loaders, forklifts, and mining haulers, are subject to many kinds of working conditions, as well as indefinite factors that lead to the complexity of the load. The load probability distribution function (PDF) of transmission gears has many distributions centers; thus, its PDF cannot be well represented by just a single-peak function. For the purpose of representing the distribution characteristics of the complicated phenomenon accurately, this paper proposes a novel method to establish a mixture model. Based on linear regression models and correlation coefficients, the proposed method can be used to automatically select the best-fitting function in the mixture model. Coefficient of determination, the mean square error, and the maximum deviation are chosen and then used as judging criteria to describe the fitting precision between the theoretical distribution and the corresponding histogram of the available load data. The applicability of this modeling method is illustrated by the field testing data of a wheel loader. Meanwhile, the load spectra based on the mixture model are compiled. The comparison results show that the mixture model is more suitable for the description of the load-distribution characteristics. The proposed research improves the flexibility and intelligence of modeling, reduces the statistical error and enhances the fitting accuracy, and the load spectra complied by this method can better reflect the actual load characteristic of the gear component. | WANG Jixin WANG Zhenyu YU Xiangjun YAO Mingyao YAO Zongwei ZHANG Erping | 2012 | Chinese Journal of Mechanical Engineering2012，25，5： | 6 |
| 4 | Separation and simultaneous quantitation of PGF2α and its epimer 8-iso-PGF2α using modifier-assisted differential mobility spectrometry tandem mass spectrometry显示文摘Because many therapeutic agents are contaminated by epimeric impurities or form epimers as a result of metabolism, analytical tools capable of determining epimers are increasingly in demand. This article is a proof-of-principle report of a novel DMS–MS/MS method to separate and simultaneously quantify epimers, taking PGF2α and its 8-epimer, 8-iso-PGF2α, as an example. Good accuracy and precision were achieved in the range of 10–500 ng/m L with a run time of only 1.5 min. Isopropanol as organic modifier facilitated a good combination of sensitivity and separation. The method is the first example of the quantitation of epimers without chromatographic separation. | Chunsu Liang Hui Sun Xiangjun Meng Lei Yina J.Paul Fawcett Huaidong Yu Ting Liu Jingkai Gu | 2018 | Acta Pharmaceutica Sinica B2018，8，2： | 3 |
| 5 | A correlation analysis method for analyzing tribological states using acoustic emission, frictional coefficient, and contact resistance signals显示文摘A multi-physical signal correlation analysis method is proposed to identify the different tribological properties of materials.The acoustic emission(AE),contact resistance,and frictional force behaviors during dry sliding between four metals,45#carbon steel,YG12 carbide,2A12 aluminum alloy,and H62 brass,have been studied.Both positive and negative correlations between the root mean square of the amplified AE(AE RMS)signal and the frictional coefficient have been found in the experiments.In addition,the AE RMS signal and the contact resistance changed with changing sliding speed and normal load in different ways.The different correlation behaviors have been attributed to diverse tribological states under different experimental conditions due to different material characteristics.The correlation analysis provides a new method of quantitatively identifying the tribological states and the AE sources during frictional interaction.The observed anomalous correlations between the AE signal and frictional coefficient should be properly considered according to the different material properties during industrial friction condition monitoring using AE technology. | Pengyi TIAN Yu TIAN Lei SHAN Yonggang MENG Xiangjun ZHANG | 2015 | Friction2015，3，1： | 3 |
| 6 | Frontier research of ultra-high-speed ultra-large-capacity and ultra-long-haul optical transmission显示文摘极端高速度, ultra-large-capacity 和 ultra-long-haul (3U ) 是光通讯的永久追求。作为光通讯的一个新模式, 3U 传播能极大地支持下一代光因特网和宽带活动通讯网络开发和工艺的进步,因此,它变得国际高技术知识产权竞争的焦点扎根。这篇论文在 3U 传播研究引入科学问题,关键技术和重要成就。 | Daojun XUE Shaohua YU Qi YANG Nan CHI Lan RAO Xiangjun XIN Wei LI Songnian FU Sheng CUI Demin LIU Zhuo LI Aijun WEN Chongxiu YU Xinmei WANG | 2016 | Frontiers of Optoelectronics2016，9，2： | 2 |
| 7 | DSB optical mm-wave with signal only on optical carrier generated by embedded LiNbO 3 Mach–Zehnder modulator显示文摘 | Jianxin Ma J. Yu Xiangjun Xin L. Chen Chongxiu Yu Kuiru Wang | 2008 | Optics Communications2008，，： | 1 |
| 8 | 3D imaging application in the studies of micro air vehicles 显示文摘 | Yanan Yu Qingping Yang Xiangjun Wang | 2013 | Computers in Industry (S0166-3615)2013，64，9： | 1 |
| 9 | Convergence of Multiple signaling cascades at glycogen synthase kinase-3:Edg receptor-mediated phosphorylation and inactivation by lysophosphatidie acid through a protein kinase C-dependent intraeellular pathway显示文摘 | Fang xiangjun Yu shuangxing Tangyi janos L | 2002 | Mol Cell Biol2002，22，7： | 1 |
| 10 | Finite element analysis of fluid-structure interaction for the design of MAV aerodynamic shape 显示文摘 | Yanan Yu Qingping Yang Xiangjun Wang | 2013 | Computers and Fluids (S0045-7930)2013，76，10： | 1 |
| 11 | Lake level variations of Qinghai Lake in northeastern Qinghai-Tibetan Plateau since 3.7 ka based on OSL dating显示文摘 | XiangJun Liu ZhongPing Lai David Madsen LuPeng Yu Kai Liu JingRan Zhang | 2010 | Quaternary International2010，，1： | 1 |
| 12 | Th1 and Th2 cytokine profiles induced by hepatitis C virus F protein in peripheral blood mononuclear cells from chronic hepatitis C patients显示文摘 | Ming Yue Xiaozhao Deng Xiangjun Zhai Ke Xu Jing Kong Jinhai Zhang Zhenxian Zhou Xiaojie Yu Xiaodong Xu Yunxi Liu Danyan Zhu Yun Zhang | 2013 | Immunology Letters2013，，2： | 1 |
| 13 | Experimental investigation of vibration signal of an industrial tubular ball mill:monitoring and diagnosing显示文摘 | SU Zhigang WANG Peibong YU Xiangjun | 2007 | Minerals Engineering2007，21，10： | 1 |
| 14 | Synthesis and structure analysis of aluminum doped zinc oxide powders显示文摘Hexagonal Al-doped zinc oxide (ZnO) powders with a nominal composition of Zn1-xAlxO (0≤x≤0.028) were synthesized by the co-precipitation method. The contents of the Al element in the samples were measured by the inductively coupled plasma-optical emission spectroscopy (ICP-OES) technique. The structures of the Zn1-xAlxO (0≤x≤0.028) compounds calcined at 1000 and 1200℃ have been deter- mined using the Rietveld full-profile analysis method. Rietveld refinements of the diffraction data indi- cated that the addition of Al initially has a considerably positive effect on the decreasing of the lattice parameters a and c of Zn1-xAlxO, but the effect becomes very slight and even negative with the further increase of the Al content. The solid solubility limit of Al in ZnO (mole fraction y) is 2.2l%, resulting in Zn0.978Al0.22O. It seems that when the Al content is excessive, Al prefers to form a ZnAl2O4 compound with ZnO, but not to incorporate into the ZnO lattice to occupy the Zn2+ cites. Two phases, [ZnO] (or Al-doped ZnO) and [ZnAl2O4], are obviously segregated in Zn1-xAlxO while the value of x is larger than 0.024. The UV-Vis absorption spectra show that the Al-doped ZnO exhibits a red-shift in the absorption edge without reduced transmission compared with pure ZnO, which also confirms that Al ions enter the ZnO lattice and form a Zn1-xAlxO solid solution. | NIE DengPan XUE Tao ZHANG Yu LI XiangJun | 2008 | Science China Chemistry2008，51，9： | 1 |
| 15 | A novel scheme to implement duplex 60-GHz radio-over-fiber link with 20-GHz double-sideband optical millimeter-wave transmitted along the fiber显示文摘 | Jianxin Ma J. Yu Xiangjun Xin Chongxiu Yu Lan Rao | 2008 | Optical Fiber Technology2008，，2： | 1 |
| 16 | Consistent response of nematode communities to management of coniferous plantations显示文摘Background:Crop-tree thinning (CTT) is a forest management practice aiming at enhancing the growth of target trees in plantations by harvesting neighboring trees. Along with the positive effect on tree growth, thinning represents a disturbance, which likely affects belowground organisms and may feed back to stand productivity.However, the impact of CTT on the belowground food web is poorly understood. Since nematodes are species-rich and abundant belowground organisms, occupying a variety of trophic positions in soil food webs and being sensitive to disturbances, they serve as ecological indicators of ecosystem disturbance.Results:We studied the effect of CTT on the soil nematode community structure in pine (Pinus massoniana Lamb.),Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) and cypress (Cupressus funebris Endl.) plantations in the Sichuan Basin three years after applying CTT. Crop-tree thinning significantly increased the abundance of soil nematodes in each of the plantations. Moreover, CTT significantly increased the relative abundance of herbivorous nematodes in each of the plantations. Furthermore, CTT increased the proportion of stress tolerators (c-p 1)and enrichment opportunists (c-p 2) and reduced the maturity, structure and enrichment indices of nematodes in Chinese fir and cypress plantations, while only subtle changes were observed in pine plantations. Interestingly,across plantations, the effects of CTT on soil nematode communities were mainly due to changes in microbial biomass nitrogen and understory vegetation diversity.Conclusions:Forest management practices resulting in more open canopies uniformly affect soil food webs by changing the quantity and quality of resources associated with increased understory cover and diversity as well as microbial food. These insights increase our understanding of the impacts of forest management on the structure and functioning of belowground communities, which may contribute to management and conservation policies for more sustainable forestry. | Haifeng Yin Yu Su Size Liu Xiangjun Li Xianwei Li Chuan Fan Pingting Guan Zhijing Xie Simin Wang Stefan Scheu Valentyna Krashevska | 2022 | Forest Ecosystems2022，9，4： | 1 |
| 17 | The transmission performance of the single sideband optical millimeter-wave with BPSK signal in the duplex radio-over-fiber link显示文摘 | Jianxin Ma J. Yu Xiangjun Xin Chongxiu Yu Huiying Huang Lan Rao | 2008 | Optics Communications2008，，19： | 1 |
| 18 | Pansystems GuanKong technology and information quantization 显示文摘 | Yu Hong Yi Leon (Xiangjun) Feng Yu Ran | 2003 | Kybernetes: The International Journal of Systems & Cybernetics2003，，32： | 1 |
| 19 | Maximal confidence intervals of the interval-valued belief structure and applications显示文摘 | Su Zhigang Wang Peihong Yu Xiangjun | 2011 | Information Sciences2011，181，9： | 1 |
| 20 | Reviving chloroquine for anti-SARS-CoV-2 treatment with cucurbit[7]uril-based supramolecular formulation显示文摘The wide-spreading SARS-CoV-2 virus has put the world into boiling water for more than a year,however pharmacological therapies to act effectively against coronavirus disease 2019(COVID-19)remain elusive.Chloroquine(CQ),an antimalarial drug,was found to exhibit promising antiviral activity in vitro and in vivo at a high dosage,thus CQ was approved by the FDA for the emergency use authorization(EUA)in the fight against COVID-19 in the US,but later was revoked the EUA status due to the severe clinical toxicity.Herein,we show that supramolecular formulation of CQ by a macrocyclic host,curcurbit[7]uril(CB[7]),reduced its non-specific toxicity and improved its antiviral activity against coronavirus,working in synergy with CB[7].CB[7]was found to form 1:1 host-guest complexes with CQ,with a binding constant of$104 L/mol.The CQ-CB[7]formulation decreased the cytotoxicity of CQ against Vero E6 and L-02 cell lines.In particular,the cytotoxicity of CQ(60 mmol/L)against both Vero E6 cell line and L-02 cell lines was completely inhibited in the presence of 300 mmol/L and 600 mmol/L CB[7],respectively.Furthermore,the CB[7]alone showed astonishing antiviral activity in SARS-CoV-2 infected Vero E6 cells and mouse hepatitis virus strain A59(MHV-A59)infected N2 A cells,and synergistically improved the antiviral activity of CQ-CB[7],suggesting that CB[7]-based CQ formulation has a great potential as a safe and effective antiviral agent against SARS-CoV-2 and other coronavirus. | Cheryl H.T.Kwong Jingfang Mu Shengke Li Yaohui Fang Qianyun Liu Xiangjun Zhang Hiotong Kam Simon M.Y.Lee Yu Chen Fei Deng Xi Zhou Ruibing Wang | 2021 | Chinese Chemical Letters2021，32，10： | 1 |
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