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Optimized operation plan for sewer sediment control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第5期11卷 335-341页

作者： yong-chao ZHOU tian LI Institute of Municipal Engineering Zhejiang University Hangzhou 310058 China College of Environmental Science and Engineering Tongji University Shanghai 200096 China

Severe operational problems of sediment deposition have frequently occurred in stormwater sewer systems in Shanghai city due to the flat topography of the area and serious illicit connections. To control sewer sediment and its subsequential problems,optimized operation plans were proposed and an innovative performance assessment method was developed. Simula-tion results demonstrated that,through changing the way of pump operation and installing necessary actuators in the system,the optimized operations,especially batch intermittent intercept plan,effectively improved the flow velocity in the entire system in dry-weather condition. In conclusion,the optimized operation is an innovative idea for improving the performance and solving the problem of sediment deposition in the sewer system in Shanghai,China.

关键词： Sewer system Sediment control Performance assessment Simulation

Tectono-Thermal Evolution, Hydrocarbon Filling and Accumulation Phases of the Hari Sag, in the Yingen-Ejinaqi Basin, Inner Mongolia,Northern China

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1157-1169页

作者： YANG Peng REN Zhanli XIA Bin tian tao ZHANG yong QI Kai REN Wenbo State Key Laboratory of Continental Dynamics Department of Geology Northwest University Guangdong Key Laboratory of Offshore Oil Exploration and Development School of Marine ScienceSun Yat-sen University Radiogenic Isotope Facility School of Earth and Environmental Sciences The University of Queensland State Key Laboratory of Ore Deposit Geochemistry Chinese Academy of Sciences Key Laboratory Coal Resource Exploration and comprehensive Utilization Ministry of Land and Resources

This work restored the erosion thickness of the top surface of each Cretaceous formations penetrated by the typical well in the Hari sag, and simulated the subsidence burial history of this well with software BasinMod. It is firstly pointed out that the tectonic subsidence evolution of the Hari sag since the Cretaceous can be divided into four phases: initial subsidence phase, rapid subsidence phase,uplift and erosion phase, and stable slow subsidence phase. A detailed reconstruction of the tectonothermal evolution and hydrocarbon generation histories of typical well was undertaken using the EASY R% model, which is constrained by vitrinite reflectance(R) and homogenization temperatures of fluid inclusions. In the rapid subsidence phase, the peak period of hydrocarbon generation was reached at c.a.105.59 Ma with the increasing thermal evolution degree. A concomitant rapid increase in paleotemperatures occurred and reached a maximum geothermal gradient of about 43-45℃/km. The main hydrocarbon generation period ensued around 105.59-80.00 Ma and the greatest buried depth of the Hari sag was reached at c.a. 80.00 Ma, when the maximum paleo-temperature was over 180℃.Subsequently, the sag entered an uplift and erosion phase followed by a stable slow subsidence phase during which the temperature gradient, thermal evolution, and hydrocarbon generation decreased gradually. The hydrocarbon accumulation period was discussed based on homogenization temperatures of inclusions and it is believed that two periods of rapid hydrocarbon accumulation events occurred during the Cretaceous rapid subsidence phase. The first accumulation period observed in the Bayingebi Formation(Kb) occurred primarily around 105.59-103.50 Ma with temperatures of 125-150℃. The second accumulation period observed in the Suhongtu Formation(Ks) occurred primarily around84.00-80.00 Ma with temperatures of 120-130℃. The second is the major accumulation period, and the accumulation mainly occurred in the Late Cr

关键词： fluid inclusion erosion thickness subsidence burial history tectono-thermal evolution hydrocarbon generation history hydrocarbon accumulation phase Inner Mongolia China

One Step Quick Detection of Cancer Cell Surface Marker by Integrated NiFe-based Magnetic Biosensing Cell Cultural Chip

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Nano-Micro Letters 2013年第3期5卷 213-222页

作者： Chenchen Bao Lei Chen tao Wang Chong Lei Furong tian Daxiang Cui yong Zhou Key Laboratory for Thin Film and Microfabrication of Ministry of Education Research Institute of Micro/Nano Science and TechnologyShanghai Jiao Tong University FOCAS Research Institute Dublin Institute of Technology

RGD peptides has been used to detect cell surface integrin and direct clinical effective therapeutic drug selection. Herein we report that a quick one step detection of cell surface marker that was realized by a specially designed NiF e-based magnetic biosensing cell chip combined with functionalized magnetic nanoparticles. Magnetic nanoparticles with 20-30 nm in diameter were prepared by coprecipitation and modified with RGD-4C, and the resultant RGD-functionalized magnetic nanoparticles were used for targeting cancer cells cultured on the NiF e-based magnetic biosensing chip and distinguish the amount of cell surface *** lines such as Calu3, Hela, A549, CaF br, HEK293 and HUVEC exhibiting different integrin expression were chosen as test samples. Calu3, Hela, HEK293 and HUVEC cells were successfully identified. This approach has advantages in the qualitative screening test. Compared with traditional method, it is fast, sensitive, low cost,easy-operative, and needs very little human intervention. The novel method has great potential in applications such as fast clinical cell surface marker detection, and diagnosis of early cancer, and can be easily extended to other biomedical applications based on molecular recognition.

关键词： Magnetic impedance Cancer cell Targeted detection Biosensing system Cell cultural chip

The hardest transition metal nitride predicted from machine learning

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Science Bulletin 2018年第15期63卷 947-948页

作者： yong, jun tian Center for High Pressure Science. State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qiahuangdaa 066004 China

Materials that possess Vickers hardness(Hv)higher than 40 GPa are known as superhard materials,which have important applications in industry and scientific ***,there are only two types of superhard materials,*** and cubic boron nitride(c-BN),which are widely used as cutting,polishing,drilling and coating *** diamond has unrivaled hardness of 60–120 GPa,its applications in some circumstances,such as cutting ferrous materials,are limited due to poor

关键词：金属氮化物机器学习涂层材料预言科学研究

Preparation of a porphyrin-polyoxometalate hybrid and its photocatalytic degradation performance for mustard gas simulant 2-chloroethyl ethyl sulfide

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Chinese Chemical Letters 2022年第5期33卷 2625-2629页

作者： Ying Yang Fangsheng tao Lijuan Zhang Yunshan Zhou Yuxu Zhong Shubo tian yong’an Wang State Key Laboratory of Chemical Resource Engineering Institute of ChemistryBeijing University of Chemical TechnologyBeijing100029 China Toxicology and Medical Countermeasures Beijing Institute of Pharmacology and ToxicologyBeijing100850China

By combining 5,10,15,20-tetra(4-chlorine)phenylporphyrin(TClPP)andα-Keggin polyoxometalate H_(5)PV_(2)Mo_(10)O_(40)(H 5 PVMo)via a simple ion-exchange method,an organic-inorganic hybrid material[C_(44)H_(28)N_(4)Cl_(4)]_(1.5)[H_(2)PMo_(10)V_(2)O_(40)]·2C_(2)H_(6)O(H_(2 )TClPP-H_(2) PVMo)was prepared and thoroughly characterized by a variety of *** homogeneous photocatalytic degradation of 2-chloroethyl ethyl sulfide(CEES)(5μL)by H_(2) TClPP-H_(2) PVMo(1×10^(−6)mol/L)was studied in methanol and methanol-water mixed solvent(v/v=1:1),in which the degradation rate of CEES reached 99.52%and 99.14%,*** reaction followed first-order reaction kinetics,and the half-life and kinetic constant in methanol and the mixed solvent were respectively 33.0min,−0.021 min−1 and 15.7min,−0.043 min−*** analysis indicated that under visible light irradiation in the air,CEES was degraded via oxidation and alcoholysis/hydrolysis in methanol and the mixed solvent.O_(2)·−and ^(1)O_(2) generated by H_(2) TClPP-H_(2) PVMo selectively oxidized CEES into a nontoxic *** oxygen capture experiments showed that H_(2) TClPP-H_(2) PVMo(φ=0.73)had a higher quantum yield of singlet oxygen than TClPP(φ=0.35)under an air atmosphere and visible light irradiation.

关键词： Chemical warfare agent Mustard gas simulant Porphyrin Polyoxometalate Photooxidation

Variable scale-convex-peak method for weak signal detection

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Science China(Technological Sciences) 2021年第2期64卷 331-340页

作者： tian RuiLan ZHAO ZhiJie XU yong State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China Department of Engineering Mechanics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Department of Applied Mathematics Northwestern Polytechnical UniversityXi’an 710072China

Avariable scale-convex-peak method is constructed to identify the frequency of weak harmonic signal. The key of this method is to find a set of optimal identification coefficients to make the transition of dynamic behavior topologically persistent. By the stochastic Melnikov method, the lower bound of the chaotic threshold continuous function is obtained in the mean-square *** intermediate value theorem is applied to detect the optimal identification coefficients. For the designated identification system, there is a valuable co-frequency-convex-peak in bifurcation diagram, which indicates the state transition of chaosperiod-chaos. With the change of the weak signal amplitude and external noise intensity in a certain range, the convex peak phenomenon is still maintained, which leads to the identification of frequency. Furthermore, the proposition of the existence of reversible scaling transformation is introduced to detect the frequency of the harmonic signal in engineering. The feasibility of constructing the hardware and software platforms of the variable scale-convex-peak method is verified by the experimental results of circuit design and the results of early fault diagnosis of actual bearings, respectively.

关键词： variable-scale Duffing system stochastic Melnikov method scale transformation circuit experiment fault diagnosis

Sensitivity of Influential Factors on Needle Insertion Experiments:A Quantitative Analysis on Phantom Deformations and Needle Deflections

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 38-48页

作者： Murong Li yong Lei tian Xu State Key Laboratory of Fluid Power&Mechatronic Systems Zhejiang UniversityHangzhou310027China

High repeatability of needle insertion experiments is essential to the needle-phantom interaction model ***,the influential factors governing the accuracy of the phantom and needle deformations have not been systematically *** this paper,the impact of influential factors,including phantom characteristic represented by the ratio of DMSO and thawing time(TT),needle properties represented by needle external diameter(NED)and operating factors such as needle insertion velocity(IV),insertion positions(IP)and repeated insertion times(RITs)are analyzed by orthogonal experiment *** range calculation shows the most sensitive parameters to phantom deformations are RITs,IV and DMSO while the most sensitive parameters to needle deflection are DMSO,TT and *** variance analysis,the significant factors on maximum tissue deformation(MTD)are IV,followed by RITs,DMSO and *** NED and TT have nearly no significant impact on *** significant sequence on maximum needle deflection(MND)is as follows:DMSO,TT and *** show that,among all impacting factors,phantom deformation is susceptible to both material properties and operative factors while the needle deflection is more susceptible to material properties of the phantom,which can help researchers in related fields to conduct experiments in a more precise manner and better understand the needle-phantom interaction mechanism.

关键词： Needle insertion Sensitivity analysis Tissue deformation Needle deflection

Effects of Warm Deformation on Mechanical Properties of TRIP Aided Fe-C-Mn-Si Multiphase Steel

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Journal of Iron and Steel Research International 2012年第6期19卷 47-52页

作者： tian yong LI Zhuan~ State Key Laboratory of Roiling and Automation Northeastern University Shenyang 110004 LiaoningChina Department o{ Material Engineering Shenyang Institute of Aeronautical Engineering Shenyang110034 Liaoning China）

Warm deformation tests were performed using a kind of tubby heater. The microstructures and mechanical properties of an Fe-C-Mn-Si multiphase steel resulting from different warm deformation temperatures were investiga- ted by using LOM （light optical microscopy）, SEM and XRD. The results indicated that the microstructure contai- ning polygonal ferrite, granular bainite and a significant amount of the stable retained austenite can be obtained through hot deformation and subsequent austempering. Warm deformation temperature affects the mechanical prop- erties of the hot rolled TRIP steels. Ultimate tensile strength balance reached maximum （881 MPa） when the speci- men was deformed at 250 ~C, and the total elongation and strength-ductility reached maximum （38% and 28 614 MPa ~ ~, respectively） at deforming temperature of 100 ~C. Martensite could nucleate when austenite was deformed above M~, because mechanical driving force compensates the decrease of chemical driving force. The TRIP effect occurs in the Fe-C-Mn-Si multiphase steel at deforming temperature ranging from 15 to 350 ~C. The results of the effects of warm deformation on the mechanical properties of the Fe-C-Mn-Si multiphase steel can provide theoretical basis for the ap- plications and the warm working of the hot rolled TRIP sheet steels in industrial manufacturing.

关键词： warm deformation Fe-C-Mn-Si multiphase steel TRIP effect mechanical property

NONLINEAR WATER WAVES IN LAGRANGIAN COORDINATES:SHALLOW FLUIDS

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Journal of Hydrodynamics 1996年第4期8卷 25-34页

作者： tian, Mei Zhu, yong Shanghai Univ Shanghai China

In this paper the KdV equation has been derived by using the Lagrangian coordinates and the head-on collision between solitary waves was studied without the assumption of irrotational motion condition. It is found tha... 详细信息

关键词： Computer simulation Flow of water Hydrodynamics Nonlinear equations Numerical analysis Water wave effects