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Geological features and hydrocarbon accumulation in the Xinken oil field,Tarim Basin

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Chinese Journal Of Geochemistry 2013年第4期32卷 367-379页

作者： SONG lichen ZHU Guangyou LIU Xingwang ZHU Yongfeng SU Jin WANG Kai Research Institute of Petroleum Exploration and Development PetroChina Research Institute of Petroleum Exploration and Development Tarim Oilfield CompanyPetroChina

Recently,a large-scale Ordovician oil and gas pool has been discovered in Xinken,north of the Tarim Basin,and it has strongly heterogeneous reservoirs and complicated fluid *** analyzing oil,gas and water samples collected from this area,in combination of field production and testing data,this study reveals that the Xinken oil pool contains dominantly normal oil characterized by low viscosity,low sulphur,and high *** has a low content of natural gas,which presents typical characteristics of wet gas and is oil-associated ***-gas correlation shows that the oil was from the Middle-Upper Ordovician source rocks and the charge and accumulation of oil and gas took place in the Late Hercynian *** by paleogeomorphology,sedimentary facies,ancient karstification,faults,and other factors in the Caledonian Period,the Ordovician carbonate reservoirs are dominated by dissolved pores,cavities and *** reservoir body of fractures and cavities is distributed in the shape of strip and laminate along faults and excellent reservoirs are mostly in the range of 70–100 m below the top of the Yijianfang *** a whole,the Xinken oil pool is a fracture-cavity pool controlled by interbedded karst reservoirs and is a complex composed of stacked karst fractures and cavities of various *** contains oil in large areas horizontally,which is quasi-laminated in distribution,and the accumulation of oil and gas is controlled by the distribution and development degree of the Ordovician carbonate *** study shows that this area has abundant resources and a great exploration potential for oil and gas.

关键词：塔里木盆地北部油气成藏地质特征碳酸盐岩储层石油伴生气油田储层控制非均质储层

Sustainable propane dehydrogenation reaction triggered by strong metal-support interaction

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Science China Chemistry 2024年

作者： lichen Liu Avelino Corma Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University Instituto de Tecnología Química Universitat Politécnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC)

This Highlight is inspired by a recent article in Science in which Gong and co-workers from Tianjin University reported a discovery of defective TiOxoverlayers on metallic Ni nanoparticles induced by strong metal-support interaction and their applications in propane dehydrogenation reaction[1]. This work represents a conceptual innovation in the design of sustainable catalysts with state-of-the-art efficiency for alkane dehydrogenation reactions based on ecofriendly metal oxides and non-noble metals.

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Wear Resistance of 3Cr2W8V Rough Surfaces

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Journal of Bionic Engineering 2005年第2期2卷 81-86页

作者： ZhouHong WangWei RenLu-quan LiYue lichen KeyLaboratoryofAutomobileMaterials（MinistryofEducation China）JilinUniversityChangchun130022P.R.China KeyLaboratoryofTerrain-MachineBionicsEngineering（MinistryofEducation China）JilinUniversityChangchun130022P.R.China DepartmentofElementTeaching JilinUniversityChangchun130012P.R.China

Three types of rough surface were processed by laser irradiation on the 3Cr2W8V material hot-work die steel surface. The wear experiments with smooth surface and rough surface samples were repeated on the pin-tray wear machine. According to the wear results, we studied the regularity of wear resistance of different rough surface samples. The results indicated that bionic rough surface can improve the wear resistance of the material and the wear resistance can be increased 1-2 times, compared with the smooth surface. Also, the wear resistance of the rough surface was affected by laser current and duration of impulse. The bigger the laser current or the impulse duration, the better is the wear resistance. When the distance between the same kind of units which are distributed on the surfaces is changed, the wear resistance changes. The wear resistance of a bionic rough surface on which the grid units were distributed at spacing of 1 mm was the best. And we designed the wear models.

关键词： wear bionic rough surface laser

Approximation Algorithms for Solving the 1-Line Minimum Steiner Tree of Line Segments Problem

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Journal of the Operations Research Society of China 2024年第3期12卷 729-755页

作者： Jian-Ping Li Su-Ding Liu Jun-Ran lichen Peng-Xiang Pan Wen-Cheng Wang Department of Mathematics Yunnan UniversityKunming650504YunnanChina School of Mathematics and Physics Beijing University of Chemical TechnologyBeijing650504China

We address the 1-line minimum Steiner tree of line segments(1L-MStT-LS)***,given a set S of n disjoint line segments in R^(2),we are asked to find the location of a line l and a set E_(l) of necessary line segments(i.e.,edges)such that a graph consisting of all line segments in S ∪ E_(l) plus this line l,denoted by T_(l)=(S,l,E_(l)),becomes a Steiner tree,the objective is to minimize total length of edges in E_(l) among all such Steiner ***,we are asked to find a set E_(0) of necessary edges such that a graph consisting of all line segments in S ∪ E_(0),denoted by T_(S)=(S,E_(0)),becomes a Steiner tree,the objective is to minimize total length of edges in E_(0) among all such Steiner trees,we refer to this new problem as the minimum Steiner tree of line segments(MStT-LS)*** addition,when two endpoints of each edge in Eo need to be located on two different line segments in S,respectively,we refer to that problem as the minimum spanning tree of line segments(MST-LS)*** obtain three main results:(1)Using technique of Voronoi diagram of line segments,we design an exact algorithm in time O(n log n)to solve the MST-LS problem;(2)we show that the algorithm designed in(1)is a 1.214-approximation algorithm to solve the MStT-LS problem;(3)using the combination of the algorithm designed in(1)as a subroutine for many times,a technique of finding linear facility location and a key lemma proved by techniques of computational geometry,we present a 1.214-approximation algorithm in time O(n^(3) log n)to solve the 1L-MStT-LS problem.

关键词： 1-Line minimum Steiner tree of line segments Minimum spanning tree of line segments Voronoi diagram of line segments Steiner ratio Approximation algorithms

iRGD-reinforced, photo-transformable nanoclusters toward cooperative enhancement of intratumoral penetration and antitumor efficacy

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Nano Research 2020年第10期13卷 2706-2715页

作者： Jing Yan Rongying Zhu Fan Wu Ziyin Zhao Huan Ye Mengying Hou Yong Liu lichen Yin Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory of Carbon-Based Functional Materials and DevicesCollaborative Innovation Center of Suzhou Nano Science&TechnologySoochow UniversitySuzhou 215123China Department of Thoracic Surgery The Second Afliated Hospital of Soochow UniversitSuzhou 215004China

Insufficient intratumoral penetration greatly hurdles the anticancer performance of nanomedicine. To realize highly efficient tumor penetration in a precisely and spatiotemporally controlled manner, far-red light-responsive nanoclusters (NCs) capable of size shrinkage and charge conversion were developed and co-administered with iRGD to synergistically improve the intratumoral penetration and the anticancer efficacy. The NCs were constructed using the singlet oxygen-sensitive (SOS) polyethylene glycolpolyurethane-polyethylene glycol (PEG-(1O2)PU-PEG) triblock copolymer to encapsulate the doxorubicin (DOX)-loaded, chlorin e6 (Ce6)-conjugated polyamindoamine (PAMAM) dendrimer (DCD) via the double-emulsion method. Co-administration of iRGD notably increased the permeability of NCs within tumor vasculature and tumor tissues. In addition, upon far-red light irradiation (660 nm) of tumors at low optical density (10 mW/cm2), the generated 1O2 could disintegrate the NCs and release the DCD with positive surface charge and ultra-small size (~ 5 nm), which synergized with iRGD to enable deep intratumoral penetration. Consequently, the local 1O2 at lethal concentrations along with the released DOX efficiently and cooperatively eradicated tumor cells. This study provides a convenient approach to spatiotemporally promote the intratumoral penetration of nanomedicine and mediate programmed anticancer therapy.

关键词： intratumoral penetration light-responsiveness singlet oxygen-degradable polymer size shrinkage charge conversion iRGD

Carbon-based supports for the electrocatalysis under industrially relevant conditions

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Science China Chemistry 2024年第4期67卷 1051-1055页

作者： Xue Yang Xianrui Gu Yang Song Guolin Hou Cheng Wang lichen Liu Wei Lin Center for Renewable Energy SINOPEC Research Institute of Petroleum ProcessingBeijing 100083China Engineering Research Center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China

1 *** materials are ideal catalyst supports for functional metal components due to their appropriate physicochemical characteristics,such as high surface areas,tunable pore structures,variable morphologies and versatile surface properties based on chemical modifications,low cost and facile preparations from diverse precursors[1,2].

关键词： versatile facile supports

Application of autologous tumor cell vaccine and NDV vaccine in treatment of tumors of digestive traet

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World Journal of Gastroenterology 2003年第3期9卷 495-498页

作者： WeiLiang HuiWang Tie-MieSun Wen-QingYao Li-lichen YuJin Chun-LingLi Fan-JuanMeng LiaoningProvincalTumorResearchInstitute Shenyang110042LiaoningProvinceChina DepartmentofColoproctologySurgeryofLiaoningTumorHospital Shenyang110042LiaoningProvinceChina

AIM. TO treat patients with stage I-IV malignant tumors of digestive tract using autologous tumor cell vaccine and NDV(Newcastle disease virus) vaccine, and observe the survival period and curative ***: 335 patients with malignant tumors of digestive tract were treated with autologous tumor cell vaccine and NDV vaccine. The autologous tumor cell vaccine received were assigned for long-term survival observation. While these failed to obtain the autologous tumor tissue were given with NDV vaccine for a received short-term observation on curative ***: The colorectal cancer patients treated with autologous tumor cell vaccine were divided into two groups:the controlled group (subjected to resection alone) (n=257),the vaccine group (subjected to both resection and immunotherapy) (n=310). 25 patients treated with NDV immunotherapy were all at stage IV without having *** postoperation adjuvant therapy patients, the 5, 6 and 7-year survival rates were 66.51%, 60.52 %, 56.50 %respectively; whereas in patients with resection alone, only 45.57 %, 44.76 % and 43.42 % respectively. The average survival period was 5.13 years (resection alone group 4.15 years), the median survival period was over 7 years (resection alone group 4.46 years). There were significant differences between the two groups. The patients treated with resection plus vaccine were measured delayed-type hypersensitivity (DTH) reactions after vaccination, (indurative scope >5 mm).The magnitude of DTH was related to the prognosis. The 5-year survival rate was 80 % for those with indurations greater than 5 mm, compared with 30 % for those with indurations less than 5 ram. The 1-year survival rate was 96 % for 25 patients treated with NDV immunotherapy. The total effective rate (CR+PR) was 24.00 % in NDV immunotherapy; complete remission (CR) in 1 case (4.00 %), partial remission (PR) in 5 cases (20.00 %), stabilizedin in 16 cases (64.00 %),progression (PD) in 1 case (4.00 %). After NDV

关键词：消化道肿瘤同源性肿瘤细胞疫苗 NDV疫苗免疫疗法生存率

Novel transmission property of zero-index metamaterial waveguide doped with gain and lossy defects

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Chinese Physics B 2023年第10期32卷 531-536页

作者：朱琼干柴立臣路海 Department of Science Taiyuan Institute of TechnologyTaiyuan 030008China Engineering Laboratory for Optoelectronic Technology and Advanced Manufacturing School of PhysicsHenan Normal UniversityXinxiang 453007China

Taking inspiration from quantum parity–time(PT) symmetries that have gained immense popularity in the emerging fields of non-Hermitian optics and photonics, the interest of exploring more generalized gain-loss interactions is never seen down. In this paper we theoretically present new fantastic properties through a zero-index metamaterial(ZIM) waveguide loaded gain and loss defects. For the case of epsilon-and-mu-near-zero(EMNZ) based ZIM medium, electromagnetic(EM)waves are cumulative and the system behaves as an amplifier when the loss cavity coefficient is greater than the gain cavity coefficient. Conversely, when loss is less than gain, EM waves are dissipated and the system behaves as an ***, our investigation is extended to non-Hermitian scenarios characterized by tailored distributions of gain and loss in the epsilon-near-zero(ENZ) host medium. The transport effect in ZIM waveguide is amplified in one mode, while it is dissipative in the other mode, which breaks the common sense and its physic is analyzed by magnetic flux. That is which cavity has the smaller loss/gain coefficient, the larger its magnetic flux, which cavity dominates. This paper is of significant importance in the manipulation of electromagnetic waves and light amplification as well as the enhancement of matter interactions.

关键词： zero-index metamaterial non-Hermitian gain-loss interaction magnetic flux

RESEARCH ON MODEL AND METHOD OF NETWORK-BASED COOPERATIVE COMMERCE CHAIN IN AUTOMOBOLE INDUSTRY

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Chinese Journal of Mechanical Engineering 2003年第4期16卷 405-407页

作者： Xiong lichen ZichenZhang FeiGu XinjianInstitute of Modem AdvancedProduction Engineering,Zhejiang University,Hangzhou 310027, China Institute of Modern Advanced Production Engineering Zhejiang University Hangzhou 310027

Based on the analysis on the development of the cooperative commerce inautomobile industry, the systematic model of the cooperative commerce chain in automobile industryis illustrated, the flow of agent-based NCCC (network-based cooperative commerce chain) system isdescribed, and the method and NCCC system in automobile industry are developed, and so thecorrectness and the feasibility of the theory and the method are confirmed.

关键词： Cooperative commerce Automobile industry Intelligent agent