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| 1 | Triaxial mechanical creep behavior of sandstone显示文摘Based on laboratory results of time-dependent mechanical behavior tests,we investigated short-term and mechanical creep behavior of sandstone,observed in conventional triaxial compression experiments at room temperature,using a servo-controlled rheology testing machine.Given our short-term experimental test results,we confirmed deviatoric creep stress levels of sandstone.Multiple deviatoric stress levels were applied in steps to each sample.Each deviatoric stress level before the final failed deviatoric stress was maintained for 48 h or longer.Time-dependent variations of axial strains of sandstone samples are discussed and evaluated.During the creep tests,complete tertiary creep curves of sandstone were observed under failed deviatoric stress levels with different confining pressures.Slices of coal in sandstone samples can lead to distinct tertiary creep deformation failure. | YANG Shengqi JIANG Yuzhou | 2010 | Mining Science and Technology2010，20，3： | 15 |
| 2 | Equilibrium dialysis study on the interaction between Cu(Ⅱ) and HSA or BSA显示文摘The interaction of Cu(Ⅱ) and human serum albumin (HSA) or bovine serum albumin (BSA) at physiological pH is studied by equilibrium dialysis. The successive stability constants are obtained by non-linear least square methods fitting Bjerrum formula. For both the Cu(Ⅱ)-HSA and Cu(Ⅱ)-BSA systems, the order of magnitude of K 1 and K 2 was found to be ≈10 4 mol -1·dm 3. There are about twenty stoichiometry binding sites found in one HSA or BSA molecule. They can be divided into two or three sets. Results of equilibrium dialysis experiments suggest that there exists one strong metal binding site in both Cu(Ⅱ)-HSA and Cu(Ⅱ)-BSA. It is the imidazol group nitrogen atoms of His 3 that are primarily concerned with copper binding site. After reaching dialysis equilibrium, there is the interaction among the different binding sites, the values of K all deviate from the simple statistical effect except for K-1 and K-2 in both Cu(Ⅱ)-HSA and Cu(Ⅱ)-BSA systems, and the positive cooperative effect is found. | LIANG Hong 1, XIN Bengang 1, WANG Xiujian 1, YUAN Yuzhou 1, ZHOU Yongqia 2 and SHEN Panwen 2 1. Department of Chemistry, Guangxi Normal University, Guilin 541004, China 2. Department of Chemistry, Nankai University, Tianjin 300071, China | 1998 | Chinese Science Bulletin1998，43，5： | 10 |
| 3 | In-situ sulfur isotope and trace element of pyrite constraints on the formation and evolution of the Nibao Carlin-type gold deposit in SW China显示文摘The fault-controlled Nibao Carlin-type gold deposit,together with the strata-bound Shuiyindong deposit,comprise a significant amount of the disseminated gold deposits in southwestern Guizhou Province,China.Five main types and two sub-types of pyrite at the Nibao deposit(Py1a/Py1b,Py2,Py3,Py4,Py5)were distinguished based on detailed mineralogical work.Py1,Py2and Py3 are Au-poor,whereas Py4 and Py5 are Au-rich,corresponding to a sedimentary and hydrothermal origin,respectively.Through systematic in situ analyses of NanoSIMS sulfur isotopes,the framboid pyrite Py1a with negative δ^34S values(-53.3 to-14.9%)from the Nibao deposit were found to originate from bacterial sulfate reduction(BSR)processes in an open and sulfate-sufficient condition while the superheavy pyrite Py1b(73.7–114.8%)is probably due to the potential influence of closed-system Rayleigh fractionation or the lack of preservation of deepsea sediments.Data of Py2 and Py3 plot within the area of S isotope compositions from biogenic and abiogenic sulfate reduction.In view of few coeval magmatic rocks in the mining district,the near zero δ^34S values of the Au-rich pyrites(Py4 and Py5)may discount the potential involvement of magmatic but metamorphic or sedimentary origin.LA-ICP-MS and TEM work show that Au in ore-related pyrite is present as both nanoparticles and structurally bound.LA-ICP-MS analyses show that the Au-rich pyrite also contains higher As,Cu,Sb,Tl and S than other types of pyrite,which inferred a distal manifestation of deep hydrothermal mineralization systems. | Jinxiang Li Chenghai Zhao Yong Huang Yuzhou Zhuo Jinwei Li | 2019 | Acta Geochimica2019，38，4： | 7 |
| 4 | DAMAGE DETECTION IN STRUCTURES USING MODIFIED BACK-PROPAGATION NEURAL NETWORKS显示文摘A nonparametric structural damage detection methodology based on neural networks method ispresented for health monitoring of structure-unknown systems.In this approach appropriate neural networksare trained by use of the modal test data from a ‘healthy’structure.The trained networks which are subse-quently fed with vibration measurements from the same structure in different stages have the capability of rec-ognizing the location and the content of structural damage and thereby can monitor the health of the structure.A modified back-propagation neural network is proposed to solve the two practical problems encountered bythe traditional back-propagation method,i.e.,slow learning progress and convergence to a false local mini-mum.Various training algorithms,types of the input layer and numbers of the nodes in the input layer areconsidered.Numerical example results from a 5-degree-of-freedom spring-mass structure and analyses on theexperimental data of an actual 5-storey-steel-frame demonstrate that neural-networks-based method is a robustprocedure and a practical tool for the detection of structural damage,and that the modified back-propagationalgorithm could improve the computational efficiency as well as the accuracy of detection. | Sima Yuzhou | 2002 | Acta Mechanica Solida Sinica2002，15，4： | 6 |
| 5 | 肠系膜上静脉血管鞘内入路在右半结肠切除术中的临床研究(英文)显示文摘Objective: The aim of the study was to investigate the clinical value of superior mesenteric vascular intrathecal approach in right hemicolectomy. Methods: We retrospectively studied the clinical data of 132 patients who had right hemicolectomy from June 2007 to June 2010, including 68 cases with superior mesenteric vascular intrathecal approach to resect specimen, and compared the operation time, blood loss, hospital stay and the number of dissected lymph nodes with patients treated with conventional surgery. Results: Compared the vascular intrathecal approach with conventional approach, the operation time and blood loss were decreased significantly, the number of Dukes C No. 3 lymph node dissection was increased, while the incidence of postoperative complications and hospital stay were equivalent to traditional surgery group. Conclusion: The use of vascular intrathecal approach in right hemicolectomy can significantly shorten the operation time and reduce bleeding and improve surgical radical outcomes. | Yuzhou Zhao, Guangsen Han, Yingkun Ren, Yanhui Gu, Chaomin Lu Department of General Surgery, Henan Tumor Hospital Affiliated Tumor Hospital, Zhengzhou University, Zhengzhou 450003, China | 2010 | The Chinese-German Journal of Clinical Oncology2010，9，11： | 6 |
| 6 | Identification of three major Bemisia tabaci biotypes in China based on morphological and DNA polymorphisms显示文摘The sweet potato whitefly, Bemisia tabaci, is a complex species, and many of its biotypes are important agricultural pests. The B and Q biotypes are invasive and coexist with the native Cv biotype on vegetable and ornamental crops in China. In this study, these three bio- types were identified based on their morphological characteristics, RAPD-PCR analysis, and DNA sequences of the COI gene. The ante-rior and posterior wax fringes of the B, Q, and Cv biotypes significantly differed from each other. Based on this morphological characteristic, the three biotypes can easily be distinguished in greenhouses and fields. Genomic DNA RAPD-PCR band patterns also revealed differences between these biotypes using the H16 primer. The B biotype has three bright DNA bands between 250 and 600 bp, the Q biotype only has one bright band at 300 bp, while the Cv biotype has no band between 250 and 500 bp. Both the Cv and Q biotypes have two bright bands at 750 and 1000 bp while the B biotype has only one band at 1000 bp. Based on the COI gene, the genetic identity between B and Cv, B and Q, and Q and CV was 85.8%, 94.7%, and 86.0%, respectively. The MP tree indicated that the phylogenetic relationship between the B and Q biotypes is much closer than that between the B and Cv or the Q and Cv biotypes. The uses of the morphological, RAPD-PCR, and DNA sequencing methods in biotype identification of B. tabaci are discussed. | Baoli Qiu Yanping Chen Li Liu Weilu Peng Xiaoxi Li Muhammad Z. Ahmed Vartika Mathur Yuzhou Du Shunxiang Ren | 2009 | Progress in Natural Science:Materials International2009，19，6： | 5 |
| 7 | Traffic Characteristics Based Dynamic Radio Resource Management in Heterogeneous Wireless Networks显示文摘The traffic with tidal phenomenon in Heterogeneous Wireless Networks(HWNs)has radically increased the complexity of radio resource management and its performance analysis.In this paper,a Simplified Dynamic Hierarchy Resource Management(SDHRM)algorithm exploiting the resources dynamically and intelligently is proposed with the consideration of tidal traffic.In network-level resource allocation,the proposed algorithm first adopts wavelet neural network to forecast the traffic of each sub-area and then allocates the resources to those sub-areas to maximise the network utility.In connection-level network selection,based on the above resource allocation and the pre-defined QoS requirement,three typical network selection policies are provided to assign traffic flow to the most appropriate network.Furthermore,based on multidimensional Markov model,we analyse the performance of SDHRM in HWNs with heavy tailed traffic.Numerical results show that our theoretical values coincide with the simulation results and the SDHRM can improve the resource utilization. | WEN Juan SHENG Min ZHANG Yan WANG Xijun LI Yuzhou | 2014 | China Communications2014，11，1： | 4 |
| 8 | Effect of environmental factors on the complexation of iron and humic acid显示文摘A method of size exclusion chromatography coupled with ultraviolet spectrophotometry and off-line graphite furnace atomic absorption spectrometry was developed to assess the complexation properties of iron(Fe) and humic acid(HA) in a water environment. The factors affecting the complexation of Fe and HA, such as ionic strength, p H, temperature and UV radiation, were investigated. The Fe–HA complex residence time was also studied. Experimental results showed that p H could influence the deprotonation of HA and hydrolysis of Fe, and thus affected the complexation of Fe and HA. The complexation was greatly disrupted by the presence of Na Cl. Temperature had some influence on the complexation. The yield of Fe–HA complexes showed a small decrease at high levels of UV radiation, but the effect of UV radiation on Fe–HA complex formation at natural levels could be neglected. It took about 10 hr for the complexation to reach equilibrium, and the Fe–HA complex residence time was about 20 hr.Complexation of Fe and HA reached a maximum level under the conditions of p H 6, very low ionic strength, in the dark and at a water temperature of about 25°C, for 10 hr. It was suggested that the Fe–HA complex could form mainly in freshwater bodies and reach high levels in the warm season with mild sunlight radiation. With changing environmental parameters, such as at lower temperature in winter or higher p H and ionic strength in an estuary, the concentration of the Fe–HA complex would decrease. | Kai Fang Dongxing Yuan Lei Zhang Lifeng Feng Yaojin Chen Yuzhou Wang | 2015 | Journal of Environmental Sciences2015，27，1： | 3 |
| 9 | Polymer coated nanodiamonds as gemcitabine prodrug with enzymatic sensitivity for pancreatic cancer treatment显示文摘The fabrication of Gemcitabine(GEM) prodrug was reported to be an effective method to enhance its pancreatic cancer treatment efficiency. Here, a kind of nanocarbon-based materials, nanodiamond(ND), was selected as the nanocarrier of GEM, owing to its outstanding surface properties and non-cytotoxicity. The polyelectrolytes,polyethyleneimine and polyacrylic acid, were used to self-assemble outside ND surface through electrostatic forces, followed by attachment of polyethylene glycol to address better biocompatibility. GEM was conjugated with an enzyme-sensitive peptide gly-phe-leu-gly to build up the controlled release platform. From characterization results of dynamic laser scattering, zeta potential and transmission electron microscope, the significant improvement of ND stability in physiological condition was proved. Non-cytotoxicity of this functionalized ND carriers and cytotoxicity of the prodrug against Bx PC-3 pancreatic cancer cells were indicated by methylthiazolyl tetrazolium(MTT) assay. In vivo experiments also revealed its superior anticancer effect compared with free GEM treatment. Therefore, the combination of polymer coated NDs with high surface capability and enzymeresponsive intracellular GEM release make it possible to realize higher treatment efficiency on pancreatic tumor therapy. | Wanying Ye Haijie Han Huan Li Qiao Jin Yuzhou Wu Sabyasachi Chakrabortty Tanja Weil Jian Ji | 2020 | Progress in Natural Science:Materials International2020，30，5： | 3 |
| 10 | Research on Critical Flow of Water under Supercritical Pressures in Nozzles显示文摘 | Yuzhou Chen Minfu Zhao Chunsheng Yang Keming Bi Kaiwen Du Shuming Zhang | 2012 | Journal of Energy and Power Engineering2012，6，2： | 3 |
| 11 | Simulation of Coupling Process of Flexible Needle Insertion into Soft Tissue Based on ABAQUS显示文摘In order to get to the desired target inside the body,it is essential to investigate the needle-tissue coupling process and calculate the tissue deformation.A cantilever beam model is presented to predicting the deflection and bending angle of flexible needle by analyzing the distribution of the force on needle shaft during the procedure of needle insertion into soft tissue.Furthermore,a finite element(FE)coupling model is proposed to simulate the needle-tissue interactive process.The plane and spatial models are created to relate the needle and tissue nodes.Combined with the cantilever beam model and the finite element needle-tissue coupling model,the simulation of needle-tissue interaction was carried out by the ABAQUS software.The comparing experiments are designed to understand the needle-tissue interactions,by which the same points in the experiments and simulation are compared and analyzed.The results show that the displacements in x and z directions in the simulation can accord with the experiments,and the deformation inside the tissue mainly occurs in the axial direction.The study is beneficial to the robot-assisted and virtual needle insertion procedure,and to help the physicians to predict the inside tissue deformation during the treatments. | Linze Wang Dedong Gao Jiajie Fu Yuzhou Luo Shijian Zhao | 2020 | Computers, Materials & Continua2020，，8： | 3 |
| 12 | Development and validation of an HPLC–MS/MS method to determine clopidogrel in human plasma显示文摘A quantitative method for clopidogrel using online-SPE tandem LC–MS/MS was developed and fully validated according to the well-established FDA guidelines.The method achieves adequate sensitivity for pharmacokinetic studies,with lower limit of quantifications(LLOQs)as low as 10 pg/m L.Chromatographic separations were performed on reversed phase columns Kromasil Eternity-2.5-C18-UHPLC for both methods.Positive electrospray ionization in multiple reaction monitoring(MRM)mode was employed for signal detection and a deuterated analogue(clopidogrel-d_4)was used as internal standard(IS).Adjustments in sample preparation,including introduction of an online-SPE system proved to be the most effective method to solve the analyte back-conversion in clinical samples.Pooled clinical samples(two levels)were prepared and successfully used as real-sample quality control(QC)in the validation of back-conversion testing under different conditions.The result showed that the real samples were stable in room temperature for 24 h.Linearity,precision,extraction recovery,matrix effect on spiked QC samples and stability tests on both spiked QCs and real sample QCs stored in different conditions met the acceptance criteria.This online-SPE method was successfully applied to a bioequivalence study of75 mg single dose clopidogrel tablets in 48 healthy male subjects. | Gangyi Liu Chunxia Dong Weiwei Shen Xiaopei Lu Mengqi Zhang Yuzhou Gui Qinyi Zhou Chen Yu | 2016 | Acta Pharmaceutica Sinica B2016，6，1： | 3 |
| 13 | Predictive value of MGMT promoter methylation on the survival of TMZ treated IDH-mutant glioblastoma显示文摘Objective:O6 methylguanine-DNA methyltransferase(MGMT)promoter methylation is a biomarker widely used to predict the sensitivity of IDH-wildtype glioblastoma to temozolomide therapy.Given that the IDH status has critical effects on the survival and epigenetic features of glioblastoma,we aimed to assess the role of MGMT promoter methylation in IDH-mutant glioblastoma.Methods:This study included 187 IDH-mutant glioblastomas and used 173 IDH-wildtype glioblastomas for comparison.KaplanMeier curves and multivariate Cox regression were used to study the predictive effects.Results:Compared with IDH-wildtype glioblastomas,IDH-mutant glioblastomas showed significantly higher(P<0.0001)MGMT promoter methylation.We demonstrated that MGMT promoter methylation status,as determined by a high cutoff value(≥30%)in pyrosequencing,could be used to significantly stratify the survival of 50 IDH-mutant glioblastomas receiving temozolomide therapy(cohort A);this result was validated in another cohort of 25 IDH-mutant glioblastomas(cohort B).The median progression-free survival and median overall survival in cohort A were 9.33 and 13.76 months for unmethylated cases,and 18.37 and 41.61 months for methylated cases,and in cohort B were 6.97 and 9.10 months for unmethylated cases,and 23.40 and 26.40 months for methylated cases.In addition,we confirmed that the MGMT promoter methylation was significantly(P=0.0001)correlated with longer OS in IDH-mutant patients with GBM,independently of age,gender distribution,tumor type(primary or recurrent/secondary),and the extent of resection.Conclusions:MGMT promoter methylation has predictive value in IDH-mutant glioblastoma,but its cutoff value should be higher than that for IDH-wildtype glioblastoma. | Ruichao Chai Guanzhang Li Yuqing Liu Kenan Zhang Zheng Zhao Fan Wu Yuzhou Chang Bo Pang Jingjun Li Yangfang Li Tao Jiang Yongzhi Wang | 2021 | Cancer Biology & Medicine2021，18，1： | 2 |
| 14 | Relationship between corneal biomechanical parameters and corneal sublayer thickness measured by Corvis ST and UHR-OCT in keratoconus and normal eyes显示文摘Background:To explore the relationship between corneal biomechanical parameters and corneal sublayer thickness using corneal visualization Scheimpflug technology(Corvis ST)and ultrahigh-resolution optical coherence tomography(UHR-OCT)in clinical and suspected keratoconus and normal eyes.Methods:Cross-sectional prospective study.A total of 94 eyes of 70 participants were recruited.Twenty five eyes of 19 keratoconus patients,52 eyes of 34 patients showing high risk of developing keratoconus according to the Belin/Ambrosio Enhanced Ectasia Display,and each eye of 17 normal subjects were enrolled.All participants underwent Corvis ST,Pentacam,and UHR-OCT examinations at the same time.Stiffness parameter A1(SP-A1),deformation amplitude ratio(DA ratio),and other biomechanical parameters were recorded using Corvis ST.The vertical and horizontal thickness profiles of central 3mm corneal epithelium,Bowman’s layer,and stroma as measured by the perpendicular distance between the neighboring interfaces were generated using UHR-OCT.The flat keratometry and steep keratometry were obtained using Pentacam.Analysis of correlation was applied to explore the association between variables.Results:Most of the biomechanical parameters and corneal sublayer thickness profiles showed statistical differences among three groups.A statistically significant linear relationship was noted between SP-A1 and DA ratio in all three groups.SP-A1 was found to be positively correlated with epithelial and Bowman’s layer thickness in the keratoconus(KC)group,and with stromal thickness in all three groups.In the normal and suspected keratoconus(SKC)groups,only stromal thickness was included in the stepwise linear regression to predict SP-A1,whereas in the KC group,steep keratometry and Bowman’s layer thickness were included.Conclusions:Significant and different correlations were noted between corneal stiffness and corneal sublayer thickness in different groups,indicating that corneal sublayers may play different roles in maintaining corneal biomechanical stability between keratoconus and normal eyes. | Yong Li Zhiqiang Xu Qiaoli Liu Yuzhou Wang Kan Lin Jiahui Xia Shihao Chen Liang Hu | 2021 | Eye and Vision2021，8，1： | 2 |
| 15 | Fluid properties and sources of Sixiangchang carbonate-associated mercury deposit, southwest China显示文摘Mercury mines in Guizhou province are the main base of mercury production and the most important resource base in China.The San-Dan mercury belt in Guizhou province contains a series of important mercury deposits.However,the source of metallogenic materials and the properties of metallogenic fluid of these mercury deposits have long been a controversial issue.In this study,we used cathode luminescence techniques to distinguish different stages of dolomite and calcite,laser ablation inductively coupled plasma mass spectrometry to analyze the trace elements,and stable isotope mass spectrometry techniques to analyze C-O isotopes compositions of dolomite and calcite in the Sixiangchang mercury deposit in San-Dan mercury belt.We also measured the sulfur isotope composition of cinnabar.Our study showed that dolomite can be divided into two stages,the lumpy dolomite associated with cinnabar in Dol 1 stage and dolomite vein in Dol 2 stage,which is associated with Cal 2 stage calcite vein.With the progress of mineralization,A1,As,Mo,Sb,and Sr elements were gradually enriched in the ore-forming fluid.The rare earth element(REE)partition curve of Dol 1 stage dolomite showed a trend of light REE enrichment.Cal 2 stage calcite and Dol 2 stage dolomite exhibited a flat-type REE partition curve,and Dol 2 stage dolomite showed a strong negative anomaly for Eu.δ^13C of carbonate mineral variation ranges from-6.89 to-2.16‰,whileδ^18O variation ranges from 13.80 to 23.09‰,and theδ34S variation range of cinnabar is 16.51-24.28‰.Carbonate mineral trace elements and C-O isotopes compositions suggested that early ore-forming fluid was reduced,and late ore-forming fluid was oxidized.The oreforming fluid of the Sixiangchang mercury deposit is a mixture of deep crustal fluid and meteoric water in deep thermal circulation,and involved in the oxidation of organic matter.The cinnabarδ^34S results showed that sulfur mainly came from seawater sulfate with the participation of microbial reduction.Sulfur is sedimentary in origin and was derived mainly from the host-rock strata. | Yuzhou Zhuo Yong Huang Jinwei Li Wei Gao Jinxiang Li | 2019 | Acta Geochimica2019，38，5： | 2 |
| 16 | Will high-frequency trading practices transform the financial markets in the Asia Pacific Region?显示文摘High-frequency trading(HFT)practices in the global financial markets involve the use of information and communication technologies(ICT),especially the capabilities of high-speed networks,rapid computation,and algorithmic detection of changing information and prices that create opportunities for computers to effect low-latency trades that can be accomplished in milliseconds.HFT practices exist because a variety of new technologies have made them possible,and because financial market infrastructure capabilities have also been changing so rapidly.The U.S.markets,such as the National Association for Securities Dealers Automated Quote(NASDAQ)market and the New York Stock Exchange(NYSE),have maintained relevance and centrality in financial intermediation in financial markets settings that have changed so much in the past 20 years that they are hardly recognizable.In this article,we explore the technological,institutional and market developments in leading financial markets around the world that have embraced HFT trading.From these examples,we will distill a number of common characteristics that seem to be in operation,and then assess the extent to which HFT practices have begun to be observed in Asian regional financial markets,and what will be their likely impacts.We also discuss a number of theoretical and empirical research directions of interest. | Robert J.Kauffman Yuzhou Hu Dan Ma | 2015 | Financial Innovation2015，1，1： | 2 |
| 17 | Research and development of a novel subunit vaccine for the currently circulating pseudorabies virus variant in China显示文摘Pseudorabies(PR)is a devastating viral disease which leads to fatal encephalitis and respiratory disorders in pigs.Commercial gE-deleted live pseudorabies virus(PRV)vaccine has been widely used to control this disease in China.However,the new-emerging variants of PRV compromises the protection provided by current vaccines and lead to the outbreak of PR in vaccinated pig herds.Several killed and live vaccine candidates based on current PRV variants have been reported to be effective to control the disease.A subunit vaccine based on gB protein,one major PRV glycoprotein which elicits strong humoral and cellular immune responses,however,was never evaluated for protection against the current circulating PRV variants.In this study,full-length PRV gB protein was successfully expressed in baculovirus/insect cells in the soluble format and was tested on 3-week-old piglets as a subunit vaccine.Compared with unvaccinated pigs,the gB-vaccinated pigs developed specific antibody-mediated responses and were protected from the virulent PRV HN1201 challenge.All vaccinated pigs survived without showing any PRV-specific respiratory and neurological signs,but all unvaccinated pigs died within 7 days after HN1201 challenge.Hence,this novel gB-based vaccine could be applied as an effective subunit vaccine to control PRV variant in China. | Yuzhou WANG Tongyan WANG He YAN Fanli YANG Linghua GUO Qingyuan YANG Xule HU Feifei TAN Yan XIAO Xiangdong LI Kegong TIAN | 2015 | Frontiers of Agricultural Science and Engineering2015，2，3： | 2 |
| 18 | A Data-driven Variable Reduction Approach for Transmission-constrained Unit Commitment of Large-scale Systems显示文摘This paper presents a data-driven variable reduction approach to accelerate the computation of large-scale transmission-constrained unit commitment(TCUC).Lagrangian relaxation(LR)and mixed-integer linear programming(MILP)are popular approaches to solving TCUC.However,with many binary unit commitment variables,LR suffers from slow convergence and MILP presents heavy computation burden.The proposed data-driven variable reduction approach consists of offline and online calculations to accelerate computational performance of the MILP-based large-scale TCUC problems.A database including multiple nodal net load intervals and the corresponding TCUC solutions is first built offline via the data-driven and all-scenario-feasible(ASF)approaches,which is then leveraged to efficiently solve new TCUC instances online.On/off statuses of considerable units can be fixed in the online calculation according to the database,which would reduce the computation burden while guaranteeing good solution quality for new TCUC instances.A feasibility proposition is proposed to promptly check the feasibility of the new TCUC instances with fixed binary variables,which can be used to dynamically tune parameters of binary variable fixing strategies and guarantee the existence of feasible UC solutions even when system structure changes.Numerical tests illustrate the efficiency of the proposed approach. | Yuzhou Zhou Qiaozhu Zhai Lei Wu Moammad Shahidehpour | 2023 | Journal of Modern Power Systems and Clean Energy2023，11，1： | 2 |
| 19 | The influence of borehole arrangement of soundless cracking demolition agents(SCDAs)on weakening the hard rock显示文摘The hard roof difficult to collapse easily causes gas accumulation,which threatens the production safety of coal mine.Therefore,roof pre-cracking is required.Although blasting and hydraulic fracturing can also crack the roof,blasting can easily induce rock bursts,whereas hydraulic fracturing needs complex equipment.In contrast,soundless cracking demolition agents(SCDAs)with noise-free,dust-free,and safe characteristics have obvious advantages.The main component of SCDA is calcium oxide,which reacts with water to produce higher expansion pressure.In this paper,focused on the angles of the borehole,the effect of SCDA is analyzed by numerical simulation based on Pingdingshan coal mine.The research results showed that the azimuthal angle a(between borehole projection and the roadway direction)does not significantly affect the efficacy of SCDAs,whereas the influence of borehole elevation angle b is far more significant than that of the azimuthal angle.Therefore,the angle b is a dominant factor influencing the effect of SCDAs.Based on different effects of SCDAs at different angle of boreholes,the weakening unit was established,so the SCDAs could give full play to roof fracturing.Moreover,field tests validated the importance of borehole angle on weakening the hard roofs. | Wei Tang Cheng Zhai Jizhao Xu Yong Sun Yuzhou Cong Yangfeng Zheng | 2021 | International Journal of Mining Science and Technology2021，31，2： | 2 |
| 20 | Recovery of injured corticospinal tracts after late recanalisation of basilar artery occlusion显示文摘In this study,we performed emergency stent angioplasty in a patient with basilar artery occlusion(BAO)at 21 hours after onset.Serial diffusion tensor tract imaging revealed that the ischaemic corticospinal tracts(CSTs),which passed through pontine infarct,rapidly recovered to normal level even after delayed reperfusion.This case provided in vivo evidences that ischaemic white matter was still salvageable even after prolonged ischaemia.It also provided a new method(diffusion tensor tract imaging)and a novel therapeutic target(white matter)in the evaluation and treatment of acute BAO. | Xiaodi Li Yuzhou Wang Zhanhang Wang Peiming Wang Chuanxing Shao Jinlong Ye | 2018 | Stroke & Vascular Neurology2018，3，4： | 2 |
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