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Relationship between nano-scale deformation of coal structure and metamorphic-deformed environments

chinese Science Bulletin 2005年第16期50卷 1784-1795页

作者： ju {1. JIANG Bo HOU Quanlin WANG Guiliang College of Mineral Resource and Geosciences China University of Mining and Technology Xuzhou 221008 China Laboratory of Computational Geodynamics College of Geosciences Graduate University of Chinese Academy of Sciences Beijing 100049. China

There is a more consanguineous relation be-tween nano-scale deformation of coal structure and meta-morphic-deformed environment. In different metamor-phic-deformed environments, deformation in the coal struc-ture can occur not only at micro-scale, but also at nano-scale, and even leads to the change of molecular structure and nano-scale pore (1.0 nm) structure. The latter is the main space absorbing coalbed methane. Through X-ray diffraction (XRD) and liquid–nitrogen absorption methods, the charac-teristics of macromolecular and nano-scale pore structures of coals in different metamorphic-deformed environments and deformational series of coals have been studied. By combin-ing with high-resolution transmission electron microcopy (HRTEM), the macromolecular and nano-scale pore struc-tures are also directly observed. These results demonstrate that the stacking Lc of the macromolecular BSU in tectonic coals increases quickly from the metamorphic-deformed environment of low rank coals to that of high rank coals. For different deformed tectonic coals, in the same metamor-phic-deformed environment, the difference of Lc is obvious. These changes reflect chiefly the difference of different tem-perature and stress effect of nano-scale deformation in tec-tonic coals. The factor of temperature plays a greater role in the increase of macromolecular structure parameters Lc, the influence of stress factor is also important. With the stress strengthening, Lc shows an increasing trend, and La /Lc shows a decreasing trend. Therefore, Lc and La /Lc can be used as the indicator of nano-scale deformation degree of tectonic coals. With increasing temperature and pressure, especially oriented stress, the orientation of molecular structure be-comes stronger, and ordering degree of C-nets and the ar-rangement of BSU are obviously enhanced. For the deforma-tion of nano-scale pore structure, in the same metamor-phic-deformed environment, along with the strengthening of stress, the ratio of m

关键词：煤结构纳米变形大分子结构地质环境

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Improved geologic surface approximation using a multiquadric method with additional constraints

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Mining Science and Technology 2010年第4期20卷 600-606页

作者： SONG Xianfeng RUI Xiaoping ju {1. YANG Yongguo Laboratory of Computing Geodynamics Graduate University of Chinese Academy of Sciences Beijing 100049 China School of Resource and Geoscience China University of Mining & Technology Xuzhou 221116 China

Geologic surface approximation is profoundly affected by the presence, density and location of scattered geologic input data. Many studies have recognized the importance of utilizing varied sources of information when reconstructing a surface. This paper presents an improved geologic surface approximation method using a multiquadric function and borehole data. Additional information, i.e., inequality elevation and dip-strikes data extracted from outcrops or mining faces, is introduced in the form of physical constraints that control local changes in the estimated surface. Commonly accepted hypothesis states that geologic surfaces can be approximated to any desired degree of exactness by the summation of regular, mathematically defined, surfaces: in particular displaced quadric forms. The coefficients of the multiquadric functions are traditionally found by a least squares method. The addition of physical constraints in this work makes such an approach into a non-deterministic polynomial time problem. Hence we propose an objective function that represents the quality of the estimated surface and that includes the additional constraints by incorporation of a penalty function. Maximizing the smoothness of the estimated surface and its fitness to the additional constraints then allows the coefficients of the multiquadric function to be obtained by iterative methods. This method was implemented and demonstrated using data collected from the 81.st coal mining area of the Huaibei Coal Group.

关键词： geologic surface spatial interpolation multiquadric function exterior penalty function physical constraints

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Nd_2.e_(1.)B/α-Fe和Pr_2.e_(1.)B/α-Fe型纳米晶永磁合金工艺与性能的对比研究

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稀土 2003年第6期24卷 52-55页

作者：王浩颉孙光飞陈菊芳强文江胡国辉杨白蔺朝晖北京科技大学材料科学与工程学院

对快淬法制备的Nd2.e1.B/α-Fe和Pr2.e1.B/α-Fe型双相纳米晶永磁在快淬条件和晶化过程中的软、硬磁相之间晶粒的形核长大行为作了对比,发现PrFeB系更容易得到较好磁性能。

关键词：纳米晶双相永磁

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An improved method of rendering oil extraction contour under constrained conditions

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Mining Science and Technology 2011年第3期21卷 337-342页

作者： Rui Xiaoping Song Xianfeng Yang Yongguo ju {1. Graduate University of chinese Academy of {1. Beijing 100049 China School of Resource and Geoscience China University of Mining ＆ Technology Xuzhou 221116 China

Aiming at the issue of oil extraction data analysis and data display, this paper introduces an effective contour map rendering method considering constrained factors of the distribution of oil reservoir and geological conditions. The constraints such as faults, ridges, scarps and island areas are first classified into two categories of geometries, namely, polylines and polygons. Then, a Triangulated Irregular Network (TIN) is constructed based on the geo-locations of oil wells and further refined with local constraints of polylines and polygons. Finally, the intersections of line segments between a specified equivalent surface and the triangles in TIN are calculated and the contours are thus formed by connecting these intersection line segments. The approach is well demonstrated with the oil extraction data of Xinjiang oil field in china.

关键词： Contour mapConstrained conditionsTINInterpolationSmooth

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Personalized treatment of well-differentiated gastric neuroendocrine tumors based on clinicopathological classification and grading:A multicenter retrospective study

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chinese Medical Journal 2024年第6期137卷 720-728页

作者： ju Huang Huimin Liu Dekun Yang Tianming Xu Jing Wang Jingnan Li Department of Gastroenterology Peking Union Medical College HospitalChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100730China Key Laboratory of Gut Microbiota Translational Medicine Research Chinese Academy of Medical SciencesBeijing 100730China Department of Gastroenterology Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical CollegeYantaiShandong 264000China Department of Gastroenterology Beijing Zhong-Neng-Jian HospitalBeijing 102401China

Background:The incidence of well-differentiated gastric neuroendocrine tumors(G-NET)is increasing annually,and while they have a good prognosis and low mortality rate,their high recurrence rate makes treatment options *** study aims to determine the relationship between individualized treatment plans and the recurrence of ***:We performed a multicenter,retrospective study of 94 patients with highly differentiated G-NET and treated at Peking Union Medical College Hospital,Yantai Yuhuangding Hospital,and beijing Zhong-Neng-Jian Hospital from November 2.1. to September *** factors for recurrence of G-NETs were investigated using chi-squared test and multifactorial logistic regression ***:After a median follow-up of 49 months,the overall recurrence rate among the 94 G-NET patients was 1.%(1./94).The recurrence rates of endoscopic mucosal resection(EMR),endoscopic submucosal dissection(ESD),somatostatin analog(SSA)therapy,and surgery were 43%(6/1.),1.%(5/49),5%(1.2.),and 1.%(1.9),***-treatment recurrence rates were significantly different(P=0.01.)among four treatments(EMR,ESD,SSA,and surgery),and further subgroup comparisons revealed lower recurrence rates in the ESD and SSA groups than in the EMR *** the second month onward,SSA therapy considerably reduced the gastrin levels from 1.81.0(571.5,2.72.8)pg/mL to 461.5(2.5.3,795.0)pg/mL(Z=-3.52.1}P1..Both chi-squared test and multifactorial logistic regression analysis suggested that among the clinicopathological parameters studied,only the pre-treatment gastrin level(P=0.01. and 0.005)and the type of treatment(P=0.01. and 0.01.)were significantly associated with G-NET ***:Individualized treatment strategies may reduce the risk of relapse after G-NET ***-term SSA therapy may be a secure and efficacious treatment option for type 1.G-NET with more than six lesions,and it substantially decreases the incidence of post-treatment rec

关键词： Well-differentiated G-NET Serum gastrin Personalized treatment Endoscopic submucosal dissection Endoscopic mucosal resection Somatostatin analog therapy Surgical resection Recurrence

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Heat flow and its coalbed gas effects in the central-south area of the Huaibei coalfield, eastern china

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Science china Earth {1. 2010年第5期53卷 672-682页

作者： TAN JingQiang ju {1. ZHANG WenYong HOU QuanLin TAN YongJie College of Earth Science Graduate University of Chinese Academy of SciencesBeijing 100049China No.3 Exploration Party of Anhui Bureau of Coal Geology Suzhou 234000China Development and Research Center China Geological SurveyBeijing 100083China

Based on an analysis of the present geo-temperature field and the thermal conductivity (K) of 62.samples from the central-south area of the Huaibei coalfield in eastern china, we calculated the heat flow and plotted its distribution map. The results show that the average heat flow in the research area is about 60 mW/m2. It is different from other major energy basins in the North china Plate, but has close relationship with the regional geology and the deep geological setting. The heat flow is comparatively higher in the southeastern, central, and northwestern areas than in the northeastern and southwestern areas. The geo-temperature distribution map of the bottom interface of the Permian coal measure was drawn by calculating its embedding depth and geo-temperature gradients. Finally, the present gas generation condition of the Permian coal measure is discussed by associating with the temperature condition, the vitrinite reflectance (Ro), the metamorphism of coal and tectonic-burial evolution. The study indicates all present characters of the Permian coal measure, such as lower present temperature, higher Ro value, middle-high rank coals, and uplift and extension events after the coal measure sediment, are favorable for the generation of secondary biogenic gas, but not thermogenic gas or primary biogenic gas.

关键词： present geo-temperature thermal conductivity heat flow coalbed gas resource effect coal measure Huaibei coalfield

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三江平原湿地CH_4排放通量研究

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水土保持学报 2004年第3期18卷 194-199页

作者：郝庆菊王跃思宋长春刘广仁王毅勇王明星中国科学院大气物理研究所北京100029 中国科学院东北地理与农业生态研究所长春130012

2.02.6月到1.月在三江平原利用静态暗箱-气相色谱法对不同土壤水分状况或积水深度的毛果苔草沼泽、小叶章草甸以及灌丛进行了CH4排放的测定,结果为毛果苔草沼泽CH4排放通量(1..9mg/m2.h)>小叶章草甸(8.5mg/m2.h)>灌丛(0.75mg/m2.h),差... 详细信息

2.02.6月到1.月在三江平原利用静态暗箱-气相色谱法对不同土壤水分状况或积水深度的毛果苔草沼泽、小叶章草甸以及灌丛进行了CH4排放的测定,结果为毛果苔草沼泽CH4排放通量(1..9mg/m2.h)>小叶章草甸(8.5mg/m2.h)>灌丛(0.75mg/m2.h),差异达到高度显著水平(α=0.01.,主要是由土壤水分状况不同而造成的。由于生境的差异,3种湿地类型CH4排放通量的季节变化形式也不尽相同。温度、土壤Eh和毛果苔草生物量是影响CH4排放的重要因素,湿地CH4排放通量和箱内外温度或不同深度的地温均呈显著或极显著正相关,小叶章草甸和毛果苔草沼泽分别与1.cm及1.cm的Eh呈极显著负相关(P1.,毛果苔草生物量和CH4排放通量呈显著正相关(P<0.05)。

关键词：三江平原湿地 CH4 排放通量

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STUDY OF THE EXIT TEMPERATURE DISTRIBUTION ON COMBUSTOR WITH DUAL-SWIRLER SPRAYERS

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chinese Journal of Aeronautics 1993年第2期 122-131页

作者： Chen Hong,Chin ju-shan (Power Institute,{1. University of Aeronautics and Astronautics, {1.,china,1.0083)

A rectangular combustor, with three dual-radial-swirler mixing cup sprayers thateach has a centrifugal primer atomizer from BK-1.engine, is used. Combustion tests areconducted at ambient pressure and temperature to study the effects of different configurationsof the dual-swirler sprayer on combustor exit temperature distribustion. The resultsshow that in relation to centrifugal nozzle, the correct designed dual-swirler is able to improvethe exit temperature distribution significantly, with its Pattern Factor reduced a valueof 0.06-0.09, and that the air flow split ratio between the primary and the secondaryswirlers, the length of mixing-cup, the rotational directions between adjacent sprayers areof importance to the Pattern Factor. This will be useful to the short annular combustor developmentin chinese Aeroengine Three Main Component Development Project.

关键词： STUDY OF THE EXIT TEMPERATURE DISTRIBUTION ON COMBUSTOR WITH DUAL-SWIRLER SPRAYERS than

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Simulating the exchanges of carbon dioxide, water vapor and heat over Changbai Mountains temperate broad- leaved Korean pine mixed forest ecosystem

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Science china Earth {1. 2005年第Z1期48卷 148-159页

作者： WANG Qiufeng, NIU Dong, YU Guirui, REN Chuanyou, WEN Xuefa, CHEN Jingming & ju Weimin Institute of Geographic {1. and Natural Resources Research, {1. Academy of {1., beijing 1.01.1. china Bureau of Science and Technology for Resources and Environment, {1. Academy of {1., beijing 1.0864, china Department of Geography, University of Toronto, Toronto M5S 3G3, Canada Graduate School of the {1. Academy of {1.,{1.}, china Shenyang Agricultural University, Shenyang 1.01.1. china Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the chinese Academy of {1. Beijing 100039 China Bureau of Science and Technology for Resources and Environment Chinese Academy of Sciences Beijing 100864 China Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the chinese Academy of {1. Beijing 100039 China Shenyang Agricultural University Shenyang 100161 China Department of Geography University of Toronto Toronto M5S 3G3 Canada

A process-based ecosystem productivity model BEPS (Boreal Ecosystem Productivity Simulator) was updated to simulate half-hourly exchanges of carbon, water and energy between the atmosphere and terrestrial ecosystem at a temperate broad-leaved Korean pine forest in the Changbai Mountains, china. The BEPSh model is able to capture the diurnal and seasonal variability in carbon dioxide, water vapor and heat fluxes at this site in the growing season of 2.03. The model validation showed that the simulated net ecosystem productivity (NEP), latent heat flux (LE), sensible heat flux (Hs) are in good agreement with eddy covariance measurements with an R2.value of 0.68, 0.86 and 0.72.for NEP, LE and Hs, respectively. The simulated annual NEP of this forest in 2.03 was 300.5 gC/m2. and was very close to the observed value. Driving this model with different climate scenarios, we found that the NEP in the Changbai Mountains temperate broad-leaved Korean pine mixed forest ecosystem was sensitive to climate variability, and the current carbon sink will be weakened under the condition of global warming. Furthermore, as a process-based model, BEPSh was also sensitive to physiological parameters of plant, such as maximum Rubisco activity (Vcmax) and the maximum stomatal conductance (gmax), and needs to be carefully calibrated for other applications.

关键词： carbon cycle, water cycle, BEPSh model, eddy covariance measurement, chinaFLUX.

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Comparative study in the spontaneous response of the medial geniculate body and inferior colliculus in rats with thalamic reticular nucleus lesion after contralateral cochlear ablation

Comparative study in the spontaneous response of the medial ...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Dan-Yi LU,Shi-Gang HE,ju-Fang HE 1.CAS-Hong Kong Joint Research Laboratory for Visuo-Auditory Integration,Institute of Biophysics,{1. Academy of {1.,beijing 1.01.1.china 2.State Key Laboratory of Brain and Cognitive {1.,Institute of Biophysics,{1. Academy of {1.,1. Datun Road,beijing 1.01.1.china 3 Laboratory of Applied Neuroscience,Department of Rehabilitation {1.,The Hong Kong Polytechnic University, Hung Horn,Kowloon,Hong Kong,china

＜正＞Tinnitus is a ringing,swishing,or other type of noise that originated in the ear or *** hypothesize that damage of the cochlear hair cells causes hypersensitivity of the cells after a period of reorganization in the auditory pathway.A malfunctioning of the thalamic reticular nucleus（TRN）would decrease its inhibition to the auditory transmission and eventually causes *** the present study,we would investigate the neuronal property change in the medial geniculate body（MGB）and inferior colliculus（IC）of the rats after cochlear ablation and TRN lesion at different *** acid was injected into the TRN to lesion the *** contralateral cochlea to the recording hemisphere was ablated under an operating *** responses of the MGB and IC were recorded with the implanted extracellular electrodes while the rat was in different physiological *** found that neurons in the auditory thalamus should more changes than those in the *** results would lead us to a further investigation on the potential mechanism focusing on the changes in the MGB.

关键词： Tinnitus cochlea thalamic reticular nucleus(TRN) medial geniculate body(MGB) inferior colliculus(IC)

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