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| 1 | A general alternate loading technique and its applications in the inverse designs of centrifugal and mixed-flow pump impellers显示文摘For the inverse designs of centrifugal and mixed-flow pump impellers,clarifying the generation process of secondary flows and putting forward corresponding suppression measures is an important approach to improve the impeller performance.In this paper,to provide a better qualitative insight into the generation mechanism of secondary flows in the impeller,a simple kinematic equation is derived based on the ideal assumptions,which indicates that the potential rothalpy gradient(PRG)is the most important dynamic source that actively induces secondary vortical flows.Induced by the natural adverse PRG on the S1 and S2 stream surfaces,two typical secondary flows,H-S and P-S secondary flows,are clearly presented.To specially suppress these typical secondary flows,a general alternate loading technique(GALT)is proposed,aiming to adjust the real blade loadingδp to control the PRG features.At the blade fore part,theδp on the hub streamline should be slowly increased to avoid breakneck growth of the potential rothalpy to reduce adverse streamwise PRG on the S2 streamsurface.At the blade middle part,theδp should be moderately decreased to reduce adverse streamwise PRG on the S1 streamsurface.At the blade aft part,the difference in theδp between the shroud and hub streamlines should be decreased faster to control the exit uniformity.By applying the GALT to the impeller designs of three typical pump types in hydraulic engineering,the organizational effect of the PRG on fundamental flow structures is proven.The GALT can effectively control the PRG distributions and suppress the secondary flows,thereby widening the pump’s high-efficiency zone,improving flow uniformity and suppressing pressure fluctuations.Compared with the current Z-G method and the ALT,the GALT can meet the requirements of'de-experience'better,thereby enabling the designers to obtain good products explicitly and quickly. | WANG ChaoYue WANG FuJun AN DongSen YAO ZhiFeng XIAO RuoFu LU Li HE ChengLian ZOU ZhiChao | 2021 | Science China(Technological Sciences)2021，64，4： | 7 |
| 2 | Effect of Manganese Incorporation Manner on an Iron-Based Catalyst for Fischer-Tropsch Synthesis显示文摘系统的研究被承担调查锰加入方式的效果在上组织上,性质,体积和表面分阶段执行基于铁的 Fischer-Tropsch 合成(英尺) 的作文, reduction/carburization 行为,和表面盐基度催化剂。催化剂样品被 N2 physisorption 描绘, X 光检查光电子光谱学(XPS ) , H2 (或公司) 规划温度的减小(TPR ) , CO2 规划温度的解吸附作用(TPD ) ,和 M ? ssbauer 光谱学。催化剂的英尺表演连续地在一个泥浆阶段被学习搅动的坦克反应堆(CSTR ) 。描述结果显示使用一起沉淀方法合并的锰倡导者能改进氧化铁的分散,并且减少氧化铁雏晶的尺寸。与受精方法合并的锰在催化剂的表面上被充实。因为锰的过多的丰富,与受精方法增加的锰倡导者在催化剂表面上在 H2,公司,和 syngas 压制催化剂的减小和 carburization。催化剂补充说用一起沉淀方法的锰为重烃(C12+) 有最高的公司变换(51.9%) 和最低选择。 | Tingzhen Li Yong Yang Chenghua Zhang Zhichao Tao Haijun Wan Xia An Hongwei Xiang Yongwang Li | 2007 | Journal of Natural Gas Chemistry2007，16，3： | 5 |
| 3 | Cerebral perfusion in corresponding blood supply areas of transient ischemic attack patients with intracranial stenosis Seven cases of diamox-perfusion verified by magnetic resonance-perfusion-weighted imaging显示文摘BACKGROUND: Due to collateral circulation and cerebrovascular reserve, arterial stenosis and reduced cerebral blood flow may not necessarily indicate impaired cerebral perfusion. Therefore, according to degree of stenosis and clinical symptoms, interventional surgery to relieve arterial stenosis in transient ischemic attack (TIA) patients with major intracranial stenosis is imprudent. Rather, cerebral perfusion and reserve capacity are direct indicators for the assessment of degree and presence of cerebral ischemia. OBJECTIVE: To evaluate cerebral perfusion and reserve in TIA patients with major intracranial stenosis or occlusion using magnetic resonance-perfusion-weighted imaging (MR-PWI) data prior to and following diamox administration. DESIGN, TIME AND SETTING: A self-comparative, neuroimaging observation was performed at the Neurological Department and Radiological Center of the First Affiliated Hospital of Jinan University between December 2007 and April 2009. PARTICIPANTS: Seven acute TIA patients, who were admitted to the Neurological Department of the First Affiliated Hospital of Jinan University between December 2007 and April 2009, were enrolled in the present study. Magnetic resonance imaging confirmed that no acute cerebral infarction happened, nor did bleeding exist. Magnetic resonance angiography, transcranial Doppler ultrasound, and/or digital subtraction angiography confirmed the presence of major intracranial arterial stenosis. Clinical symptoms corresponded to blood supplying regions of the arterial stenosis. METHODS: Baseline MR-PWI was performed on seven patients with intracranial stenosis or occlusion. Two grams of acetazolamide (diamox) were orally administered after 2 days. A second PWI was performed after 2 hours to compare cerebral perfusion parameters prior to and following diamox administration. MAIN OUTCOME MEASURES: PWI results of cerebral perfusion prior to and following diamox administration. RESULTS: The baseline PWI from five patients indicated decreased cerebral perfusion areas. Following oral administration of diamox, cerebral perfusion significantly decreased in those areas. Moreover, new areas of decreased cerebral perfusion were observed in two out of the five patients. In one patient, no significant decrease in cerebral perfusion was found. In another patient, baseline PWI indicated decreased cerebral perfusion in the left hemisphere. However, normal perfusion was observed in both cerebral lobes following diamox administration. CONCLUSION: TIA patients with intracranial stenosis, who are diagnosed by PWI and exhibited decreased cerebral perfusion and reserve, might require further treatment such as intervention by angioplasty. | Li'an Huang Xuewen Song Anding Xu Xueying Ling Zhichao Lin | 2010 | Neural Regeneration Research2010，5，1： | 3 |
| 4 | Experimental and Numerical Study on Co-combustion Behaviors and NO_(x) Emission Characteristics of Semi-coke and Coal in a Tangentially Fired Utility Boiler显示文摘The utilization of powdery semi-coke as a power fuel in pulverized coal-fired power plants has become a new and potential technique to consume the excess powdery semi-coke.The characteristic of low volatile results in poor combustion performance and high NO_(x) emission,and to co-fire with bituminous coal is a practical strategy to address this problem.However,the co-combustion characteristics and the inherent interaction between semi-coke and coal remain insufficiently understood.In addition,the influences of secondary air arrangement,the boiler operation load,and the fuel type on co-combustion process are still unclear,which is urgent to be further explored.In the present study,experiments and numerical simulations were jointly utilized to inquire into the co-combustion behaviors and NO_(x) emission features of semi-coke and coal.The results demonstrated that the'out-furnace method'was a suitable choice for small-capacity boiler when the proportion of semi-coke was 33%,due to the limited combinations of the semi-coke injection position.It was recommended that semi-coke was preferred to be injected from the middle layers of the furnace under the'in-furnace method'to improve the overall co-combustion performance.The critical value of the separated over fire air ratio in this study was 27.5%,over which a slight drop of carbon content in fly ash could come about.Moreover,the elevation in the proportion of separated over fire air gave rise to the significant decline of NO_(x) concentration.The constricted secondary air arrangement was preferred to be employed due to the high boiler efficiency.The separated over fire air and the surrounding air needed to maintain a wide-open degree to prevent the increase of NO_(x) emissions and the coking of nozzles.For the load reduction regulation method adopted in this study,the NO_(x) concentration first rose and then dropped,while the burnout ratio decreased obviously as the operation load was reduced.Different combinations of coal and semi-coke generated significant influences on co-combustion behaviors within the furnace.The NO_(x )generated by high-volatile fuel (bituminous coal) combustion was mainly affected by volatile-N,while the NO_(x )generated by low-volatile fuel (semi-coke) was mainly impacted by char-N.This study is of guiding significance for the efficient and clean utilization and beneficial to the large-scale application of powder semi-coke in power plants. | WANG Chang’an FENG Qinqin JIN Liyan WANG Zhichao YAO Wei WANGPengqian DU Yongbo ZHANG Xilai YANG Zhongcan CHE Defu | 2021 | Journal of Thermal Science2021，30，4： | 2 |
| 5 | 显示文摘 | Li Zhong'an Di Chong'an Zhu Zhichao | 2006 | Polymer2006，47，： | 1 |
| 6 | Research and applications of membrane bioreactors in China: Progress and prospect显示文摘 | Zhiwei Wang Zhichao Wu Suihai Mai Caifeng Yang Xinhua Wang Ying An Zhen Zhou | 2008 | Separation and Purification Technology2008，，2： | 1 |
| 7 | Effects of Qidi Tangshen granules and their separate prescriptions on podocytes in mice with diabetic nephropathy显示文摘Objective:Previous studies have found that Qidi Tangshen granules(QDTS),a combination therapy of supplementing essence(Tianjing,TJ)and unblocking the collaterals(Tongluo,TL),can reduce kidney damage in db/db mice.This study aimed to explore the effect of QDTS and their separate prescriptions on podocytes in mice with diabetic nephropathy.Methods:The db/db mice were used in this experiment as an animal model,while wild-type C57BL/6J mice were used as normal controls.At the age of 12 weeks,the db/db mice were randomly divided into 5 groups(db/db,db/dbþvalsartan,db/dbþQDTS,db/dbþTJ and db/dbþTL).The urine albumin excretion ratio(UAE)was measured by enzyme-linked immunosorbent assay before and after the intervention.The ultrastructure of the kidney podocytes was observed by transmission electron microscopy.The protein expression levels of nephrin and desmin were detected by immunohistochemistry.Results:QDTS and their separate prescriptions significantly decreased the UAE and attenuated the renal pathological injury.QDTS and their separate prescriptions also reduced the fusion rate of the foot processes and increased the expression of nephrin protein.In contrast,QDTS and their separate prescriptions(TJ and TL)reduced the expression level of desmin protein.Conclusion:QDTS and their separate prescriptions might reduce diabetes-induced renal injury by reducing podocyte damage.The therapeutic effect of QDTS was more pronounced than TJ and TL. | Borui Yu Hongfang Liu Xue Gao Qingqing Liu Qing Du Xiangming Wang Zhichao An Lin Wang Huidi Xie | 2022 | Journal of Traditional Chinese Medical Sciences2022，9，1： | 0 |
| 8 | Effect of Sulfate on an Iron Manganese Catalyst for Fischer-Tropsch Synthesis显示文摘Fischer-Tropsch 合成性能上的硫酸盐的效果在泥浆被调查 -- 在 Fe-Mn 催化剂上分阶段执行连续地搅动的坦克反应堆(CSTR ) 。与硫酸盐的不同层次使妊娠的催化剂的 physiochemical 性质被 N2 physisorption 描绘, X 光检查光电子光谱学(XPS ) , H2 (或公司) 规划温度的减小(TPR ) , M ? ssbauer 光谱学,和 CO2 规划温度的解吸附作用(TPD ) 。描述结果显示使妊娠的硫酸盐稍微减少了催化剂的 BET 表面区域和毛孔体积,在公司和 syngas 压制了催化剂减小和 carburization,并且减少催化剂表面盐基度。同时,硫酸盐的小数量的增加改进了 Fischer- Tropsch 合成(英尺) 和水气体移动(WGS ) 的活动,转移了产品点亮烃(C1 C11 ) 并且压制了重产品(C12+) 的形成。SO2 的增加 ? 4 在每 100 g Fe 0.05 0.80 g 装载的硫改进了 FTS 活动到催化剂,并且 S-05 催化剂给了最高的公司变换(62.3%) ,并且在这硫水平以外,催化剂的活动减少了。 | Tingzhen Li Yong Yang Zhichao Tao Haijun Wan Xia An Chenghua Zhang Hongwei Xiang Yongwang Li | 2007 | Journal of Natural Gas Chemistry2007，16，4： | 0 |
| 9 | Zonal disintegration test of deep tunnel under plane strain conditions显示文摘To investigate the zonal disintegration form of the surrounding rock in deep tunnels,model tests were performed in the simulation set-up of fracture mechanism and support technology of surrounding rock in deep tunnel.The test results illustrate that the first fracture of the surrounding rock occurred at the intersection of the tunnel floor and the side wall.After more serious destruction,the side wall and the vault were destroyed.Although the fracture width of each surrounding rock mass was distinct,they were relatively uniform with a nearly continuous fracture form.The width of the split bodies of the model tunnels(i.e.,the annular zonal disintegration area)developed with an increasing load.It was observed from the fitting curves of the data that all radial strain values of the surrounding rock were more symmetric with a smooth fitting curve,and the maximum value occurred near the tunnel wall before reducing instantly.The circumferential strain values were dispersed and the data were inconsistent with the fitting curve,which caused some data to be unreliable.The phenomenon of zonal disintegration was primarily caused by radial tension strain of the surrounding rock.This phenomenon would not extend indefinitely as the rupture range would be limited to a certain extent,because the maximum radial tension strain of the surrounding rock was less than the limiting value. | Zhichao Tian Chun’an Tang Yejiao Liu Yibo Tang | 2020 | International Journal of Coal Science & Technology2020，7，2： | 0 |
| 10 | On the Range of Certain ASH Algebras of Real Rank Zero显示文摘In this paper,the authors consider the range of a certain class of ASH algebras in[An,Q.,Elliott,G.A.,Li,Z.and Liu,Z.,The classification of certain ASH C^(*)-algebras of real rank zero,J.Topol.Anal.,14(1),2022,183–202],which is under the scheme of the Elliott program in the setting of real rank zero C^(*)-algebras.As a reduction theorem,they prove that all these ASH algebras are still the AD algebras studied in[Dadarlat,M.and Loring,T.A.,Classifying C^(*)-algebras via ordered,mod-p K-theory,Math.Ann.,305,1996,601–616]. | Qingnan AN Zhichao LIU | 2023 | Chinese Annals of Mathematics,Series B2023，44，2： | 0 |
| 11 | Agriculture green development in China: insights and advances显示文摘Reconciling the tasks of producing adequate amounts of nutritious food for the increasing global population while preserving the environment and natural ecosystems simultaneously is an enormous challenge. The concept of agriculture green development(AGD) and the necessary governmental policies were developed to address the aforementioned challenge in China and to help achieve the related global sustainable development goals. Agriculture green development emphasizes the synergy between green and development;current agriculture has to transform from the intensive farming with high inputs, high environmental impacts and low resource-use efficiency to a more sustainable agriculture, in order to ensure an adequate supply of nutritious food while delivering environmental integrity, improved economic profitability,and social equity. A research program on AGD was established by China Agricultural University with four research themes, namely: green crop production, green integrated crop-animal production, green food and industry,and green ecological environment and ecosystem services, to provide a scientific basis for future developments and to facilitate the implementation of AGD in practice. AGD requires a multistakeholder approach, fueled by innovative and interdisciplinary research. Joint actions have to be taken by governments, farmers, supply industries, consumers, educators, extension services and researchers to support AGD. This requires strong coordination and public awareness campaigns. This review presents the progress that has been made over the past 5 years and makes recommendations for more research and development, in order to better deliver agricultural green and sustainable development on national and international scales. | Jianbo SHEN Qichao ZHU Yong HOU Wen-Feng CONG Wen XU Jiuliang XU Zhichao AN Xiaoqiang JIAO Kai ZHANG Tianxiang YU Lin MA Oene OENEMA William J.DAVIES Fusuo ZHANG | 2024 | Frontiers of Agricultural Science and Engineering2024，11，1： | 0 |
| 12 | A Co-expression System Based on Phage and Phagemid to Select Cognate Antibody-antigen Pairs in vivo显示文摘A modified selectively infective phage (SIP) is developed to facilitate the selection of interacting antibody antigen pairs from a large single chain antibody (scFv) library in vivo. The system is constructed with a modified helper phage M13KO7 and phagemid pCANTAB 5 E. The antigen fused to the C terminal of N1 N2 domain and the scFv to the N terminal of CT domain of the gIIIp of filamentous phage are encoded on the phage and phagemid vectors respectively. The phages produced by co transformants restore infectivity via interaction between antigen and antibody fusions in the cell periplasm. In a model system, the scFv fragment of the anti hemagglutinin 17/9 antibody and its corresponding antigen are detected in the presence of a 10 5 fold excess of a non interacting control pairs, which demonstrates this system to be very sensitive and facile to screen a large single chain antibody library. | 胡学军 Zhang Zhichao Yuan Xiaodong Bao Yongming An Lijia | 2002 | High Technology Letters2002，8，2： | 0 |
| 13 | Effect of Deformation Condition on Axial Compressive Precision Forming Process of Tube with Curling Die显示文摘The effect of the deformation condition on the axial compressive precision forming process of tube with curling die was investigated by using a rigid-plastic FEM. The results show that the forming accuracy depends mainly on geometric condition rp/d0, little on tube material properties and friction condition; the relative gap △/2rp of double-walled tubes obtained decreases with Increasing rp/d0, and there is a parameter k for a given to/do or rp/t0, when rp/d0 >k, △/2rp< 1, otherwise △/2rp>1. | He YANG and Zhichao SUN College of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 0 |
| 14 | On the classification of certain real rank zero C^(*)-algebras显示文摘In this paper,we give a classification of real rank zero C^(*)-algebras that can be expressed as inductive limits of a sequence of a subclass of Elliott-Thomsen algebras C. | Qingnan An Zhichao Liu Yuanhang Zhang | 2022 | Science China Mathematics2022，65，4： | 0 |
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