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Potential risks of spectrum whitening deconvolution——compared with well-driven deconvolution

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Petroleum Science 2009年第2期6卷 146-152页

作者： Li Guofa Zhou Hui Zhao chao State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Key Laboratory of CNPC Geophysical Exploration China University of Petroleum Beijing 102249 China

Deconvolution is widely used to increase the resolution of seismic data. To compare the resolution ability of conventional spectrum whitening deconvolution to thin layers with that of welldriven deconvolution, a complex sedimentary geological model was designed, and then the simulated seismic data were processed respectively by each of the two methods. The amplitude spectrum of seismic data was almost white after spectrum whitening, but the wavelet resolution was low. The amplitude spectrum after well-driven deconvolution deviated from white spectrum, but the wavelet resolution was high. Further analysis showed that if an actual reflectivity series could not well satisfy the hypothesis of white spectrum, spectrum whitening deconvolution had a potential risk of wavelet distortion, which might lead to a pitfall in high resolution seismic data interpretation. On the other hand, the wavelet after well- driven deconvolution had higher resolution both in the time and frequency domains. It is favorable for high resolution seismic interpretation and reservoir prediction.

关键词： Well-driven high resolution spectrum whitening deconvolution seismic wavelet

A study on volunteer augmentation navigation technology

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Science China(Physics,Mechanics & Astronomy) 2011年第6期54卷 1029-1034页

作者： WU HaiTao 1,2,LU XiaoChun 1,2,ZOU DeCai 1,2 & HAN Tao 1,2 1 National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China 2 Key Laboratory of Precision Navigation and Timing Technology,Chinese Academy of Sciences,Xi’an 710600,China 1. National Time Service Center Chinese Academy of Sciences Xi’an 710600 China2. Key Laboratory of Precision Navigation and Timing Technology Chinese Academy of Sciences Xi’an 710600 China

Navigation augmentation technology is one of the most common methods to increase the continuity,reliability and integrity of the global satellite navigation *** concept of volunteer augmentation navigation (VNA) is proposed and the elements and topological structure of VNA are also analyzed in this *** study focuses on the neural network model that volunteers and ordinary users use modern communication information network to exchange self-organizing *** neural cell model of Volunteer Augmentation Navigation using shared information is *** interactive general relative positioning is *** basic theories and methods of volunteer augmentation navigation are formed on the basis of the above-mentioned *** study of realization mechanism of volunteer augmentation technology helps to form a relatively integral architecture of volunteer augmentation navigation.A user self-service satellite navigation augmentation which combines information exchange and navigation services may strengthen the continuity,reliability and integrity of the navigation *** volunteer augmentation navigation theory proposed in this paper improves the traditional satellite navigation application model and expands the connotation and denotation of satellite navigation augmentation methods.

关键词： volunteer augmentation navigation self-organizing information exchange interactive general relative positioning

On sedimentation of phosphorus in specified area outside of the Changjiang Estuary

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Acta Oceanologica Sinica 2001年第1期20卷 85-93页

作者： Zhou Huaiyang 1,2 ,Pan Jianming 1,2 ,Chen Jianfang 1,2 ,Wang Huaizhao 1, y.Saito 3,y.Kanai 31 .SecondInstituteofOceanography ,StateOceanicAdministration ,Hangzhou 310 0 12 ,China (hyzhou @zgb com cn)2 .KeyLaboratoryofSubmarineGeoscienceofS Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Key Lab. of Submarine Geoscience State Oceanic Administration Hangzhou 310012 China Geologic Survey of Japan Tsukuba Ibaraki 305-8567 1-1-3 Higashi Japan

Phosphorus content of surface sediments(0～1cm)sampled by multicorer in specified area (31°00′～32°00′N,122°30′～124°00′E)outside of the Changjiang Estuary in October 1997 and May 1998 respectively is *** with the data of phosphorus concentration in seawaters,grain size and chemical composition as well as the isotopic sedimentary rate of surface sediment and etc.,it is recognized that seasonal variability of different water masses could be sensitively recorded in *** pattern of phosphorous in surface sediment in the area is probably both controlled by the Changjiang River diluted water mass and the Huanghai Sea and the East China Sea mixed water *** and resedimentation perhaps do actively happen in the study region that could make re suspended sediments release pollutants as phosphorus into seawater and have significant impacts on marine ecosystem,although it is indicated that at least some of phosphorus in sediments exists in immobile or inorganic forms.

关键词： The Changjiang Estuary phosphorus sediment seasonal variability

Model test of the tunnel subjected to high water pressure in Jinping Second Cascade Hydropower Station,China

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Science China(Technological Sciences) 2011年第S1期54卷 192-198页

作者： WANG JianXiu 1,2,FENG Bo 2,HU LiSheng 2,TIAN PuZhuo 2,SUI DongChang 2,TANG yiQun 1,2 &yANG Ping 1,2 1 Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China 2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University Shanghai 200092 China2. Department of Geotechnical Engineering Tongji University Shanghai 200092 China

In the area with high groundwater pressure,grout curtain is often adopted to reduce the water pressure on tunnel lining.A series of model tests for the diversion tunnel of the Jinping Second Cascade Hydropower Station,China,is designed to study the effect of grout *** impact of the thickness of grout curtain,permeability of grout curtain,internal water pressure and drainage inflow on the distribution of water pressure are *** results indicates that under un-drained condition,water pressure is equal to hydrostatic one no matter grout curtain is selected or not,water pressure under drained condition is far less than that of un-drained condition,drainage in tunnel can reduce tunnel water pressure *** same inflow,both increasing of thickness and decrease of hydraulic conductivity of grout curtain can reduce water pressure *** the same water pressure,the smaller inflow of grout curtain,the less volume of water to be *** impact of hydraulic conductivity of grout curtain is more obvious than that of *** increasing of internal water pressure,the water pressure of grout curtain increases too,and the water pressure increases nearly *** proposed thickness of grout curtain for the diversion tunnels is 16 m.

关键词： tunnel grout curtain water pressure model test

Novel Fe-based amorphous magnetic powder cores with ultra-low core losses

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Science China(Technological Sciences) 2010年第5期53卷 1290-1293页

作者： ZHANG Liang1,2,LI DeRen1,2,LU Zhichao1,2,LU CaoWei1,2,LIU TianCheng1,2,GUO Feng2,LIU KaiHuang1,WANG Jun 2 & ZHOU ShaoXiong1,2 1 Central Iron and Steel Research Institute,Beijing 100081,China 2 Advanced Technology and Materials Co.,Ltd.,Beijing 100081,China 1. Central Iron and Steel Research Institute Beijing 100081 China2. Advanced Technology and Materials Co. Ltd. Beijing 100081 China

Amorphous magnetic alloy powders were prepared from bulk metallic glasses Fe74Cr2Mo2Sn2P10Si4B4C2 with supercooled liq-uid region of 32 K by water *** magnetic powder core precursor was produced from a mixture of the amorphous alloy powder with addition of insulation and bonding materials by mold compacting at room *** annealing the core precursor,the amorphous magnetic core exhibits superior magnetic properties as compared with molypermalloy powder *** initial permeability up to 1 MHz was about 80,the flux density at 300 Oe was 1.06 T and the core loss at 100 kHz for Bm=0.1 T was only 329 kW/*** ultra-low core loss is attributed to the combination of relatively high resistivity and the amorphous structure of the Fe-based amorphous *** the outstanding magnetic properties,the Fe-based amorphous magnetic powder core had a much lower cost which renders the powder cores a potential candidate for a variety of industrial applications.

关键词： Fe-based amorphous powder water atomization amorphous powder core ultra-low core loss

Engineered Cancer Nanovaccines:A New Frontier in Cancer Therapy

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Nano-Micro Letters 2025年第2期17卷 134-168页

作者： yijie Wang Congrui Liu chao Fang Qiuxia Peng Wen Qin Xuebing yan Kun Zhang Central Laboratory and Department of Medical Ultrasound Sichuan Academy of Medical SciencesSichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaNo.32West Second SectionFirst Ring RoadChengdu 610072People’s Republic of China Department of Stomatology and Central Laboratory School of MedicineShanghai Tenth People’s HospitalTongji UniversityNO.301 Yan‑Chang‑Zhong RoadShanghai 200072People’s Republic of China Jiangsu Provincial Innovation and Practice Base for Postdoctors Suining People’s HospitalAffiliated Hospital of Xuzhou Medical UniversityNo.2Bayi West RoadSuiningXu Zhou 221000Jiangsu ProvincePeople’s Republic of China

Vaccinations are essential for preventing and treating disease,especially cancer nanovaccines,which have gained considerable interest recently for their strong anti-tumor immune *** can prompt the immune system to generate antibodies and activate various immune cells,leading to a response against tumor tissues and reducing the negative effects and recurrence risks of traditional chemotherapy and *** enhance the flexibility and targeting of vaccines,nanovaccines utilize nanotechnology to encapsulate or carry antigens at the nanoscale level,enabling more controlled and precise drug delivery to enhance immune *** nanovaccines function by encapsulating tumor-specific antigens or tumor-associated antigens within *** small size of these nanomaterials allows for precise targeting of T cells,dendritic cells,or cancer cells,thereby eliciting a more potent anti-tumor *** this paper,we focus on the classification of carriers for cancer nanovaccines,the roles of different target cells,and clinically tested cancer nanovaccines,discussing strategies for effectively inducing cytotoxic T lymphocytes responses and optimizing antigen presentation,while also looking ahead to the translational challenges of moving from animal experiments to clinical trials.

关键词： Cancer nanovaccines Immunotherapy Nanobiotechnology Immune targets Signaling pathway

Preparation and Recipe Optimization of Water-based Architectural Heat Insulation Coatings

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Journal of Wuhan University of Technology(Materials Science) 2008年第6期23卷 932-937页

作者：陈立军 School of Chemical Engineering and Materials Science Zhejiang University of Technology State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology

Water-based architectural heat insulation coatings were studied to overcome the drawbacks of conventional inorganic silicate heat insulation coatings. The heat insulation coatings were prepared with the method of mechanical agitation when the mixed organic polymer emulsions were used as binder of the coatings and the mixed heat insulating aggregates were applied as powder, and some assistants were also added. Water temperature difference in the plastic container, which was coated with heat insulation coatings, represented the heat-insulating property of the coatings. The influences of components of mixed polymer emulsion, mass ratio of polymer emulsion to powder, particle size of heat insulating aggregates, added amount of air entraining admixture and the match of thickeners on the properties of the coatings were studied. The experimental results show that the heat insulation coatings with good finishing, heat-insulation property and artificial weathering can be prepared when the binder is composed of 66.92% styrene-acrylic emulsion, 16.59% elastic emulsion and 16.49% silicone-acrylic emulsion, the mass ratio of polymer emulsion to powder is 0.45, the particle size of heat insulating aggregates is in the rang of 200 and 250 mesh size, the added amount of sericite is 15%, and the added amount of air entraining admixture is in the range of 1.0% and 1.5% and the thickeners are the mixtures of ASE-60 and RM-5000.

关键词： heat insulation coating polymer emulsion heat insulating aggregate preparation recipe optimization

Properties and applications of cold supersonic gas jet

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Science China(Physics,Mechanics & Astronomy) 2006年第6期49卷 709-715页

作者： ZHANG Shaofeng1,2,MA Xinwen1,2,LIU Huiping2,LI Bin1,2 & ZHU Xiaolong1,2 1. Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

By analyzing the formation mechanism of a supersonic gas jet,a set of equations which describe the atomic beam properties were established. The influence of initial temperature,initial pressure,background gas pressure and pumping speed was discussed in detail. A simulation program was developed based on the equations,and the results under different initial conditions were obtained. The results are in good agreement with the experimental data,and suggest that,in order to get much smaller transverse momentum in collision experiments,it is necessary to lower the initial temperature and the initial pressure of the supersonic gas jet,together with increasing the pumping speed. These results are very instructive for construction of a new generation of cold supersonic gas jets.

关键词： cold supersonic gas jet,zone of silence,nozzle,skimmer.

A study on the sharp knee and fine structures of cosmic ray spectra

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 842-847页

作者： WANG Bo1,yUAN Qiang1,FAN chao1,2,ZHANG JianLi1,HU HongBo1 & BI XiaoJun1 1 Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China 2 Department of Physics,Shandong University,Jinan 250100,China 1. Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China2. Department of Physics Shandong University Jinan 250100 China

The paper investigates the overall and detailed features of cosmic ray(CR) spectra in the knee region using the scenario of nuclei-photon interactions around the acceleration *** supernova remnants can be the physical realities of such kind of CR acceleration *** results show that the model can well explain the following problems simultaneously with one set of source parameters:the knee of CR spectra and the sharpness of the knee,the detailed irregular structures of CR spectra,the so-called"component B"of Galactic CRs,and the electron/positron excesses reported by recent *** coherent explanation serves as evidence that at least a portion of CRs might be accelerated at the sources similar to young supernova remnants,and one set of source parameters indicates that this portion mainly comes from standard sources or from a single source.

关键词： cosmic ray knee fine structures e+e-excesses "component B" single source