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| 1 | Dynamic modeling of a hose-drogue aerial refueling system and integral sliding mode backstepping control for the hose whipping phenomenon显示文摘Dynamic modeling of a hose-drogue aerial refueling system(HDARS) and an integral sliding mode backstepping controller design for the hose whipping phenomenon(HWP) during probe-drogue coupling are studied. Firstly, a dynamic model of the variable-length hose-drogue assembly is built for the sake of exploiting suppression methods for the whipping phenomenon.Based on the lumped parameter method, the hose is modeled by a series of variable-length links connected with frictionless joints. A set of iterative equations of the hose's three-dimensional motion is derived subject to hose reeling in/out, tanker motion, gravity, and aerodynamic loads accounting for the effects of steady wind, atmospheric turbulence, and tanker wake. Secondly,relying on a permanent magnet synchronous motor and high-precision position sensors, a new active control strategy for the HWP on the basis of the relative position between the tanker and the receiver is proposed. Considering the strict-feedback configuration of the permanent magnet synchronous motor, a rotor position control law based on the backstepping method is designed to insure global stability. An integral of the rotor position error and an exponential sliding mode reaching law of the current errors are applied to enhance control accuracy and robustness. Finally,the simulation results show the effectiveness of the proposed model and control laws. | Wang Haitao Dong Xinmin Xue Jianping Liu Jiaolong | 2014 | Chinese Journal of Aeronautics2014，27，4： | 17 |
| 2 | BASIC THEORY AND METHOD OF WELDING ARC SPECTRAL INFORMATION显示文摘Arc spectral information is a rising information source which can solve many problems that can not be done with arc electric information and other arc information.It is of important significance to develop automatic control technique of welding process.The basic theory and methods on it play an important role in expounding and applying arc spectral information.Using concerned equation in plasma physics and spectrum theory,a system of equations including 12 equations which serve as basic theory of arc spectral information is set up.Through analyzing of the 12 equations,a basic view that arc spectral information is the reflection of arc state and state variation,and is the most abundant information resource reflecting welding arc process is drawn.Furthermore,based on the basic theory,the basic methods of test and control of arc spectral information and points out some applications of it are discussesed. | Li Junyue Li Zhiyong Li Huan Xue Haitao School of Material Science and Engineering,Tianjin University,Tianjin 300072, China | 2004 | Chinese Journal of Mechanical Engineering2004，17，2： | 9 |
| 3 | Chemical kinetics study of hydrocarbon regeneration from organic matter in carbonate source rocks and its significance显示文摘In the comparison research of hydrocarbon regeneration, a low maturity carbonate source rock is heated to different temperatures in a gold tube to obtain a series of samples with different maturities. Then, the heated samples, before and after extraction, are subjected to Rock-Eval pyrolysis through a thermal simulation of hydrocarbon regeneration in order to inspect pyrolysis characteristics and probe into the characteristics of the chemical kinetics of each sample. The results indicate that, whether hy- drocarbon regeneration peak is delayed or advanced, the potential of hydrocarbon regeneration is closely related to the expulsion amount and breakdown maturity of primary hydrocarbon generation. After extraction, the average activation energy of artificially maturated samples increases with the in- creasing maturity, but the chemical kinetic properties of un-extracted samples decrease. The calibrated chemical kinetic models that describe extracted and un-extracted samples are applied to the Bohai Bay and the Songliao Basin, and the results indicate that the combination of the two models can explain some contradictory conclusions previously reported. These results also facilitate the quantitative evaluation of the amount of hydrocarbon regeneration by the chemical kinetic method. | LU ShuangFang ZHONG NingNing XUE HaiTao PAN ChangChun LI JiJun LI HongTao | 2007 | Science China Earth Sciences2007，50，4： | 8 |
| 4 | On extended state based Kalman filter design for a class of nonlinear time-varying uncertain systems显示文摘This paper considers the filtering problem for a class of multi-input multi-output systems with nonlinear time-varying uncertain dynamics, random process and measurement noise. An extended state based Kalman filter, with the idea of timely estimating the unknown dynamics, is proposed for better robustness and higher estimation precision. The stability of the proposed filter is rigorously proved for nonlinear timevarying uncertain system with weaker stability condition than the extended Kalman filter, i.e., the initial estimation error, the uncertain dynamics and the noises are only required to be bounded rather than small enough. Moreover, quantitative precision of the proposed filter is theoretically evaluated. The proposed algorithm is proved to be the asymptotic unbiased minimum variance filter for constant uncertainty. The simulation results of some benchmark examples demonstrate the feasibility and effectiveness of the method. | Wenyan BAI Wenchao XUE Yi HUANG Haitao FANG | 2018 | Science China(Information Sciences)2018，61，4： | 7 |
| 5 | On Designing Consistent Extended Kalman Filter显示文摘This paper studies the consistency of the extended Kalman filter(EKF) for a kind of nonlinear systems. Based on the EKF algorithm, the authors propose the quasi-consistent EKF(QCEKF)as well as the tuning law for its parameters. The quasi-consistency of the proposed algorithm is proved.Finally, the feasibility of the algorithm is illustrated by the numerical simulation on an orbit determination example. | JIANG Yanguang HUANG Yi XUE Wenchao FANG Haitao | 2017 | Journal of Systems Science & Complexity2017，30，4： | 7 |
| 6 | Doping bioactive elements into a collagen scaffold based on synchronous self-assembly/mineralization for bone tissue engineering显示文摘Pure collagen is biocompatible but lacks inherent osteoinductive,osteoimmunomodulatory and antibacterial activities.To obtain collagen with these characteristics,we developed a novel methodology of doping bioactive elements into collagen through the synchronous self-assembly/mineralization(SSM)of collagen.In the SSM model,amorphous mineral nanoparticles(AMN)(amorphous SrCO3,amorphous Ag3PO4,etc.)stabilized by the polyampholyte,carboxymethyl chitosan(CMC),and collagen molecules were the primary components under acidic conditions.As the pH gradually increased,intrafibrillar mineralization occurred via the self-adaptive interaction between the AMNs and the collagen microfibrils,which were self-assembling;the AMNs wrapped around the microfibrils became situated in the gap zones of collagen and finally transformed into crystals.Srdoped collagen scaffolds(Sr-CS)promoted in vitro cell proliferation and osteogenic differentiation of rat bone marrow mesenchymal stromal cells(rBMSCs)and synergistically improved osteogenesis of rBMSCs by altering the macrophage response.Ag-doped collagen scaffolds(Ag-CS)exhibited in vitro antibacterial effects on S.aureus,as well as cell/tissue compatibility.Moreover,Sr-CS implanted into the calvarial defect of a rat resulted in improved bone regeneration.Therefore,the SSM model is a de novo synthetic strategy for doping bioactive elements into collagen,and can be used to fabricate multifunctional collagen scaffolds to meet the clinical challenges of encouraging osteogenesis,boosting the immune response and fighting severe infection in bone defects. | Huanhuan Liu Mingli Lin Xue Liu Ye Zhang Yuyu Luo Yanyun Pang Haitao Chen Dongwang Zhu Xue Zhong Shiqing Ma Yanhong Zhao Qiang Yang Xu Zhang | 2020 | Bioactive Materials2020，5，4： | 6 |
| 7 | The role and clinical implications of microRNAs in hepatocellular carcinoma显示文摘Hepatocellular carcinoma (HCC) is common and one of the most aggressive of all human cancers. Recent studies have indicated that miRNAs, a class of small noncoding RNAs that regulate gene expression post-transcriptionally, directly contribute to HCC by targeting many critical regulatory genes. Several miRNAs are involved in hepatitis B or hepatitis C virus replication and virus-induced changes, whereas others participate in multiple intracellular signaling pathways that modulate apoptosis, cell cycle checkpoints, and growth-factor-stimulated responses. When disturbed, these pathways appear to result in malignant transformation and ultimately HCC development. Recently, miRNAs circulating in the blood have acted as possible early diagnostic markers for HCC. These miRNA also could serve as indicators with respect to drug efficacy and be prognostic in HCC patients. Such biomarkers would assist stratification of HCC patients and help direct personalized therapy. Here, we summarize recent advances regarding the role of miRNAs in HCC development and progression. Our expectation is that these and ongoing studies will contribute to the understanding of the multiple roles of these small noncoding RNAs in liver tumorigenesis. | ZHAO Xue YANG Zhen LI GuangBing LI DongKai ZHAO Yi WU Yan ROBSON Simon C. HE Lian XU YiYao MIAO R-uoYu ZHAO HaiTao | 2012 | Science China(Life Sciences)2012，55，10： | 6 |
| 8 | Correction Method of Light Hydrocarbons Losing and Heavy Hydrocarbon Handling for Residual Hydrocarbon (S_1) from Shale显示文摘In China, hot researches on shale oil were raised by the important breakthrough of shale oil in America. Obviously, the first important issue is the actual shale oil resource potential of China, and the selection of the key appraisement parameter is vital to the shale oil resource amount. Among the appraisement parameters, the oil content parameter(S1) is the key one, but the evaluation result is generally lower because of light hydrocarbon losing and heavy hydrocarbon handling. And the more important thing is that the light hydrocarbon with small molecular weight is more recoverable, and therefore its amount is important to the total shale oil yields. Based on pyrolysis experiments and the kinetic model of hydrocarbon generation, correction factors and a model of light hydrocarbon losing and heavy hydrocarbon handling were established. The results show that the correction factor of heavy hydrocarbon handling is 3.2, and that of light hydrocarbon losing is controlled by kerogen type, maturity and hydrocarbon generation environment(closed or open). | WANG Min TIAN Shansi CHEN Guohui XUE Haitao HUANG Aihua WANG Wenguang | 2014 | Acta Geologica Sinica(English Edition)2014，88，6： | 6 |
| 9 | A Study of the Migration and Accumulation Efficiency and the Genesis of Hydrocarbon Natural Gas in the Xujiaweizi Fault Depression显示文摘摘要:为了在 Xujiaweizi 调查迁居和烃天然气的累积效率,并且为它的开始的分类提供新证据,指责消沉,在一个封闭系统的一个来源岩石热分解实验被设计并且执行了。基于这,为描述从有机物的产生和碳同位素分别在这期间处理的气体的运动模型被建立,校准然后外推到由联合 Xushen-1 的热历史数据很好的地质的条件。结果显示在 Xujiaweizi 差错消沉的煤措施是典型高效率的煤气的来源,从他们产生的天然气有高迁居和累积效率,并且因而,大规模天然气累积发生在区域。在 Xujiaweizi 差错消沉的高度 / 过去成熟的煤措施与高 13C1 价值产生 coaliferous 气体(>?20%) 在迟了的阶段,使碳成为器官的链烷气体的同位素作文反常地重。另外,通过天然气的 caprock 混合和驱散能导致否定的碳同位素顺序(13C1 > 13C2 > 13C3 > 13C4 ) 器官的链烷,气体,和驱散罐头也导致器官的链烷气体的反常地重的碳同位素作文。至于无机的 nonhydrocarbon 气体水库的发现,它能是仅仅服务一补助证据而非烃气体是无机的一条直接证据。作为结果,作为无机的气体在 Xujiaweizi 差错消沉分类烃天然气需要更充分的证据。 | LI Jijun LU Shuangfang XUE Haitao HUO Qiuli XU Qingxia | 2008 | Acta Geologica Sinica(English Edition)2008，82，3： | 5 |
| 10 | A novel PTEN gene promoter mutation and untypical Cowden syndrome显示文摘Cowden syndrome (CS), an autosomal dominant disorder, is one of a spectrum of clinical disorders that have been linked to germline mutations in the phosphatase and tensin homolog (PTEN) gene. Although 70-80% of patients with CS have an identifiable germline PTEN mutation, the clinical diagnosis presents many challenges because of the phenotypic and genotypic variations. In the present study, we sequenced the exons and the promoter of PTEN gene, mutations and variations in the promoter and exons were identified, and a PTEN protein expression negative region was determined by immunohistochemistry (IHC). In conclusion, a novel promoter mutation we found in PTEN gene may turn off PTEN protein expression occasionally, leading to the disorder of PTEN and untypical CS manifestations. | Chen Liu Guangbing Li Rongrong Chen Xiaobo Yang Xue Zhao Haitao Zhao | 2013 | Chinese Journal of Cancer Research2013，25，3： | 5 |
| 11 | Scale-Dependent Nature of Porosity and Pore Size Distribution in Lacustrine Shales: An Investigation by BIB-SEM and X-Ray CT Methods显示文摘Due to heterogeneous pore distributions within shales,petrophysical properties of shales determined by scanning electron microscopy(SEM) and X-ray computed tomography(CT) methods strongly depend on the observed domain size(analysis scale). In this paper,the influence of the analysis scale on areal and bulk porosities and pore size distribution(PSD) for lacustrine shales from the Dongying sag of Bohai Bay Basin,China were investigated using broad ion beam(BIB)-SEM and X-ray CT methods.The BIB-SEM cross-sections with high imaging resolution(10 nm/pixel) and a large field of view(>1 mm2)mainly describe the 2 D nanoscale pore system in the two shales(samples F41#-2 and Y556#-1),while CTbased 3 D reconstructions with resolutions of 0.42(F41#-1) and 0.5 μm/pixel(H172#-1) reflect the 3 D submicron pore system. The results indicate that the areal(bulk) porosity exhibits a multiple power-law distribution with increasing analysis area(volume),which can be used to extrapolate the porosity of a given area(volume). Based on SEM and CT investigations,the sizes of the minimum representative elementary areas(REAs) and volumes(REVs) were determined respectively,which are closely associated with the heterogeneousness of the pore system. Minimum REAs are proposed to be 2.93×10~4(F41#-2) and 0.91×10~4μm2(Y556#-1),and minimum REVs are 0.016(F41#-1) and 0.027 mm^3(H172#-1). As the analyzed areas(volumes) are larger than the minimum REA(REV),obtained 2 D(3 D) PSDs are comparable to each other and can be considered to reflect the shale PSD. These results provide insights into the porosity and PSD characterization of shales by SEM and X-ray CT methods. | Junqian Li Pengfei Zhang Shuangfang Lu Chen Chen Haitao Xue Siyuan Wang Wenbiao Li | 2019 | Journal of Earth Science2019，30，4： | 5 |
| 12 | The Impact of Aqueous Medium on Gas Yields and Kinetic Behaviors of Hydrogen Isotope Fractionation during Organic Matter Thermal Degradation显示文摘以便在有机物期间在煤气的收益和氢同位素分别的运动行为上认出水的媒介的影响热降级,金试管仪器被用来由与不同性质和比例的水混合 nC18 进行热模拟实验。天然气部件的收益,在每个部件和试验性的温度对加热的率的氢同位素作文之中的关系被获得了,并且结果显示在更高的温度条件下面,含水的实验在煤气的收益,更多什么时候流水上有明显的影响被增加,烃气体和 H2 的更高的数量被产出,并且水的存在显然与重烃气体的存在延长温度间隔。比由无水的实验产生了的,含水的实验产生的烃气体的氢同位素才显然轻,并且与增加的水的增加的数量,烃气体的 D 价值逐渐地减少。与煤气的收益相比, 5D 价值的变化对在热模拟实验的水的媒介更敏感。与增加的水的数量相比,然而,水的中等性质在煤气的收益上有更小的影响,它仍然在水的媒介的氢同位素作文上显示出 inherit 效果。通过模型模拟和同位素分别行为分析,氢同位素分别过程能被化学运动模型很好描述,这被验证。正常甲烷和包含 D 甲烷的反应部分的差别大,相应于一样的激活精力。正常甲烷的内容在有更低的激活精力的部分显然是更高的,当包含 D 甲烷的内容在有更高的激活精力的部分是更高的时。因此,它将导致更大的氢同位素分别振幅,和 D 价值将对成熟的变化更敏感。同时,从在含水的实验的 nC18 的甲烷产生的平均激活精力在无水的实验比那高,并且越增加的水的大数量,越 larger 甲烷产生反应的平均激活精力。这在形成历史和煤气来源的关联的煤气的水库的学习为它的探索申请打了基础,它在这取向显示研究和申请前景。 | LU Shuangfang WANG Min XUE Haitao LI Jijun CHEN Fangwen XU Qingxia | 2011 | Acta Geologica Sinica(English Edition)2011，85，6： | 5 |
| 13 | Molecular Fingerprints of Soil Organic Matter in a Typical Freshwater Wetland in Northeast China显示文摘Natural wetlands are known to store huge amounts of organic carbon in their soils. Despite the importance of this storage,uncertainties remain about the molecular characteristics of soil organic matter(SOM), a key factor governing the stability of soil organic carbon(SOC). In this study, the molecular fingerprints of SOM in a typical freshwater wetland in Northeast China were investigated using pyrolysis gas-chromatography/mass-spectrometry technology(Py-GC/MS). Results indicated that the SOC, total nitrogen(TN),and total sulfur contents of the cores varied between 16.88% and 45.83%, 0.93% and 2.82%, and 1.09% and 3.79%, respectively. The bulk δ^13C and δ^15N varied over a range of 9.85‰, between –26.85‰ and –17.00‰, and between –0.126‰ and 1.002‰, respectively. A total of 134 different pyrolytic products were identified, and they were grouped into alkyl(including n-alkanes(C:0) and n-alkenes(C:1),aliphatics(Al), aromatics(Ar), lignin(Lg), nitrogen-containing compounds(Nc), polycyclic aromatic hydrocarbons(PAHs), phenols(Phs), polysaccharides(Ps), and sulfur-containing compounds(Sc). On average, Phs moieties accounted for roughly 24.11% peak areas of the total pyrolysis products, followed by Lg(19.27%), alkyl(18.96%), other aliphatics(12.39%), Nc compounds(8.08%), Ps(6.49%), aromatics(6.32%), Sc(3.26%), and PAHs(1.12%). Soil organic matter from wetlands had more Phs and Lg and less Nc moieties in pyrolytic products than soil organic matters from forests, lake sediments, pastures, and farmland.δ^13 C distribution patterns implied more C3 plant-derived soil organic matter, but the vegetation was in succession to C4 plant from C3 plant. Significant negative correlations between Lg or Ps proportions and C3 plant proportions were observed. Multiple linear analyses implied that the Ar and Al components had negative effects on SOC. Alkyl and Ar could facilitate ratios between SOC and total nitrogen(C/N), while Al plays the opposite role. Al was positively related to the ratio of dissolved organic carbon(DOC) to SOC. In summary, SOM of wetlands might characterize by more Phs and lignin and less Nc moieties in pyrolytic products. The use of Pyrolysis gas-chromatography/mass-spectrometry(Py-GC/MS) technology provided detailed information on the molecular characteristics of SOM from a typical freshwater wetland. | LI Zhe ZHANG Zhongsheng XUE Zhenshan SONG Xiaolin ZHANG Hongri WU Haitao JIANG Ming LYU Xianguo | 2019 | Chinese Geographical Science2019，29，4： | 4 |
| 14 | Hydrocarbon Generation Kinetic Characteristics from Different Types of Organic Matter显示文摘以便对比烃产生从有机物(OM ) 的不同类型的运动特征,从不同的盆的 18 件样品是用在开的系统下面的 Rock-Eval-II 仪器的 pyrolyzed。从试验性的结果,烃产生率对温度的曲线能容易被获得,它能通常被用来优化运动参数(一, E, F ) 烃产生模型。在这份报纸,与一个单个频率因素模型一起的平行一阶的反应被选择描述烃产生运动特征。烃产生运动参数表明复合结构的类型和湖的外形的化学契约打字我 OM 是相对同类的,与统治激活精力的。湖的外形类型 II2 OM 和陆上的外形的化学契约的类型打 III OM 是相对建筑群,与宽广激活精力分布,和精力与氢的减少掉的优势的激活的反应部分索引。运动参数的地质的推测上的激活精力分发空格的影响也被调查。结果证明它在烃转变比率(TR ) 上并且因此有小效果,有激活精力的合适的数字的平行一阶的反应模型能更好被用来描述烃产生过程。运动参数的 18 件样品的地质的推测结果证明烃产生的分发范围类型评价我 OM 是相对狭窄的,烃产生曲线是光滑的。在比较,为类型 II1 和类型 II2III OM 的烃产生的分发范围是相当宽的,并且烃产生曲线有变化现象。烃产生率和变化现象的分发范围与 OM 的运动参数有关;越狭窄激活精力分发,越 narrower,并且越多更光滑烃产生率分发烃产生曲线,并且反过来也如此。 | WANG Min LU Shuangfang XUE Haitao WANG Weiming LIU Min DONG Qi WANG Guihua | 2011 | Acta Geologica Sinica(English Edition)2011，85，3： | 4 |
| 15 | Modeling and simulation of a time-varying inertia aircraft in aerial refueling显示文摘Studied in this paper is dynamic modeling and simulation application of the receiver aircraft with the time-varying mass and inertia property in an integrated simulation environment which includes two other significant factors, i.e., a hose–drogue assembly dynamic model with the variable-length property and the wind effect due to the tanker's trailing vortices. By extending equations of motion of a fixed weight aircraft derived by Lewis et al., a new set of equations of motion for a receiver in aerial refueling is derived. The equations include the time-varying mass and inertia property due to fuel transfer and the fuel consumption by engines, and the fuel tanks have a rectangle shape rather than a mass point. They are derived in terms of the translational and rotational position and velocity of the receiver with respect to an inertial reference frame. A linear quadratic regulator(LQR) controller is designed based on a group of linearized equations under the initial receiver mass condition. The equations of motion of the receiver with a LQR controller are implemented in the integrated simulation environment for autonomous approaching and station-keeping of the receiver in simulations. | Wang Haitao Dong Xinmin Xue Jianping Liu Jiaolong Wang Jian | 2016 | Chinese Journal of Aeronautics2016，29，2： | 4 |
| 16 | Recent progress in the discovery of inhibitors targeting coronavirus proteases显示文摘Coronaviruses(CoVs) can cause highly prevalent diseases in humans and animals. The fatal outbreak of severe acute respiratory syndrome(SARS) and Middle East respiratory syndrome(MERS) highlights the threat posed by this unique virus subfamily. However, no specific drugs have been approved to treat CoV-associated diseases to date. The CoV proteases, which play pivotal roles in viral gene expression and replication through a highly complex cascade involving the proteolytic processing of replicase polyproteins, are attractive targets for drug design. This review summarizes the recent advances in biological and structural studies, together with the development of inhibitors targeting CoV proteases, particularly main proteases(M^(pro)s), which could help develop effective treatments to prevent CoV infection. | Haofeng Wang Song Xue Haitao Yang Cheng Chen | 2016 | Virologica Sinica2016，31，1： | 4 |
| 17 | First experimental constraints on WIMP couplings in the effective field theory framework from CDEX显示文摘We present weakly interacting massive particles(WIMPs) search results performed using two approaches of effective field theory from the China Dark Matter Experiment(CDEX), based on the data from both CDEX-1B and CDEX-10 stages. In the nonrelativistic effective field theory approach, both time-integrated and annual modulation analyses were used to set new limits for the coupling of WIMP-nucleon effective operators at 90% confidence level(C.L.) and improve over the current bounds in the low mχregion. In the chiral effective field theory approach, data from CDEX-10 were used to set an upper limit on WIMP-pion coupling at 90% C.L. We for the first time extended the limit to the m_(χ)<6 GeV/c^(2) region. | Yi Wang Zhi Zeng Qian Yue LiTao Yang KeJun Kang YuanJing Li Mehment Agartioglu HaiPeng An JianPing Chang JingHan Chen YunHua Chen JianPing Cheng Cheng Yi Chiang WenHan Dai Zhi Deng ChangHao Fang XinPing Geng Hui Gong QiuJu Guo XuYuan Guo HongJian He Li He ShengMing He JinWei Hu TuChen Huang HanXiong Huang HaiTao Jia LiPing Jia Xi Jiang HauBin Li JianMin Li Jin Li MingXuan Li RenMingJie Li Xia Li YuLan Li Bin Liao FongKay Lin ShinTed Lin ShuKui Liu YanDong Liu Yu Liu YuanYuan Liu ZhongZhi Liu Hao Ma YuCai Mao QiYuan Nie JinHua Ning Hui Pan NingChun Qi Jie Ren XiChao Ruan ChangSong Shang Vivek Sharma Ze She Lakhwinder Singh Monoj Kumar Singh TianXi Sun ChangJian Tang WeiYou Tang Yang Tian GuangFu Wang Li Wang Qing Wang Yu Chen Wang YunXiang Wang Zhen Wang Henry Tsz-King Wong ShiYong Wu YuCheng Wu HaoYang Xing Yin Xu Tao Xue YuLu Yan Nan Yi ChunXu Yu HaiJun Yu JianFeng Yue Ming Zeng BingTao Zhang Lei Zhang FengShou Zhang ZhenYu Zhang KangKang Zhao MingGang Zhao JiFang Zhou ZuYing Zhou JingJun Zhu | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，8： | 3 |
| 18 | BASIC THEORY AND APPLICATIONS OF WELDING ARC SPECTRAL INFORMATION显示文摘焊接弧光谱信息是一升起焊接信息来源。Insome 场合,它能反映焊接过程的许多物理现象并且解决不能用完弧的许多问题电的信息,声学的信息和另外的弧信息。重要意义重要意义。焊接弧上的许多年学习工作光谱 anthor 的信息从理论,方法和应用程序的三个方面被讨论。基本理论,看法和焊接弧的严峻的方法光谱信息被提出了。在应用程序方面,例如,许多使用了例子在弧有害气体监视(例如氢和氮) 与焊接弧的方法光谱信息;焊接弧光谱在自动缝接追踪被使用的焊接水池的成像;与焊接弧焊接微滴转移控制光谱信息等等,被介绍。特别,在在搏动的 GMAW 焊接微滴转移的实时控制的成功的应用程序也被介绍。这些应用程序例子证明焊接的弧光谱信息有大应用意义和发展潜力。这些内容将在适用并且传播焊接弧起一个重要作用光谱信息技术。 | LIJunyue XUE Haitao LI Huan SONG Yonglun | 2007 | Chinese Journal of Mechanical Engineering2007，20，4： | 3 |
| 19 | Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors显示文摘Commutation failure(CF)is a frequent dynamic event at inverter of LCC-HVDC systems caused by AC side faults which can lead to inverter blocking,interruption of active power transfer,and even system blackout.To eliminate CFs and improve system performance,new Flexible LCC-HVDC topologies have been proposed in previous research but with limited analysis on its economic performance.Therefore,to further validate the applicability of Flexible LCC-HVDC topologies,this paper utilizes Life-Cycle Cost Analysis model to analyze the life-cycle cost of inverter stations for conventional LCCHVDC,Capacitor Commutated Converter based HVDC(CCCHVDC)topology and Flexible LCC-HVDC topologies including Controllable Capacitor based Flexible LCC-HVDC,AC Filterless Controllable Capacitor based Flexible LCC-HVDC and improved Flexible LCC-HVDC.Through a case study based on a 500 kV,1000 MW LCC-HVDC scheme,comparison results show that the AC Filterless Controllable Capacitor based Flexible LCCHVDC topology and the improved Flexible LCC-HVDC topology have lower cost than the conventional LCC-HVDC and CCCHVDC topologies,which proves that the elimination of CFs can be achieved with reduced cost. | Nan Chen Kunpeng Zha Haitao Qu Fangling Li Ying Xue Xiao-Ping Zhang | 2022 | CSEE Journal of Power and Energy Systems2022，8，6： | 2 |
| 20 | Effects of Tidal Channels and Roads on Landscape Dynamic Distribution in the Yellow River Delta, China显示文摘Landscape characters in estuarine regions generally controlled by tidal regimes and human activities like road construction.In this work,tidal channels and road construction in the Yellow River Delta(YRD)were extracted by visual interpretation methods so as to decipher impacts of tidal channel development and road construction on landscape patch change during 1989–2016.Spatial distribution history of three wetlands,which covered by Phragmites australis(freshwater marsh,FM),Suaeda salsa(salt marsh,SM),and mudflats(MD)were also established.Results indicated that tidal channel,number,frequency,and fractal dimension were all the maximum in 2003,and the minimum in 1998,respectively.Road length,number,and density showed increasing trend during 1989–2016.MD were the predominant landscape type,followed by FM and SM during 1989-2016.Principal component analysis implied two extracted factors,F1 and F2,which could represent 91.93% of the total variations.F1 mainly proxied tidal channel development,while F2 represented road construction.A multiple linear regression analysis showed positive effects of both F1 and F2 on FM patch numbers and negative impacts on SM patch areaes with R^2 values of 0.416 and 0.599,respectively.Tidal channels were negatively related to MD patch numbers,while roads were positively related to that.In any case,road construction showed larger impacts on landscape type shifting than that of tidal channel development in the YRD. | YU Xiaojuan ZHANG Zhongsheng XUE Zhenshan WU Haitao ZHANG Hongri | 2020 | Chinese Geographical Science2020，30，1： | 2 |
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