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北京市规划和自然资源委员会北京市农业农村局关于印发《加强耕地和永久基本农田保护促进种植类设施农业高质量发展指导意见》的函(京规自函〔2.2.〕2.89号)

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北京市人民政府公报 2024年第12期 30-36页

作者： 1.北京市规划和自然资源委员会 2.北京市农业农村局北京市规划和自然资源委员会北京市农业农村局

各涉农区人民政府:为落实《自然资源部农业农村部国家林业和草原局关于严格耕地用途管制有关问题的通知》(自然资发〔2.2.〕1.6号)、《北京市规划和自然资源委员会北京市农业农村局北京市园林绿化局关于加强和规范设施农业用地管理的通... 详细信息

各涉农区人民政府:为落实《自然资源部农业农村部国家林业和草原局关于严格耕地用途管制有关问题的通知》(自然资发〔2.2.〕1.6号)、《北京市规划和自然资源委员会北京市农业农村局北京市园林绿化局关于加强和规范设施农业用地管理的通知》(京规自发〔2.2.〕62.)要求,进一步规范耕地和永久基本农田上种植类农业设施用地管理,现将《加强耕地和永久基本农田保护促进种植类设施农业高质量发展指导意见》印发给你们,请认真组织实施。

关键词：永久基本农田用途管制园林绿化局种植类自然资源部北京市农业设施用地加强和规范

CMC surfaces in the hyperbolic 3.space

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Chinese Science Bulletin 1998年第7期43卷 547-550页

作者： YU Zuhuan 1. 2.and LI Zhenqi 1. 3.1. Institute of Mathematics, Fudan {1., Shanghai 2.043., China 2. Department of Mathematics,Sichuan Union {1., Chengdu 61.064, China 3. Department of Mathematics, Nanchang {1., Nanchang 3. nstitute of Mathemalics Fudan University Shanghai China Department of Mathematics Sichuan Union University Chengdu China Department of Mathematics Nanchang University Nanchang China

CMC-H surfaces satisfying H≥1.are studied. It is proved that these surfaces possess a natural representation which is a generalization of the Bryant’s result.

关键词： hyperbolic space CMC surface Weierstrass representation.

Study on the two and three-parameter working stability regions of 3.-TZP suspension

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Science China(Technological Sciences) 2006年第5期49卷 547-568页

作者： CHEN Youqiang1. 2. ZHANG Xinni3. CHEN Sha’ou3.& QI Ping3.1. Department of Chemistry, Qingdao {1., Qingdao 2.6071. China 2. Department of Chemistry, Tsinghua {1., {2. 1.0084, China 3. Department of Physics, Qingdao {1., Qingdao 2.6071. China Department of Chemistry Qingdao University Qingdao China Department of Chemistry Tsinghua University Beijing China Department of Physics Qingdao University Qingdao China

We determined the variation tendency of viscosity (η) at various solids load- ing (α) for 3.-TZP suspension as a function of dispersant concentration (Cw) using vis- cosity measurement, measured the diameter of particles as a function of Cw in very dilute suspension using light scattering method, and obtained the surface features of the sedi- ment of suspension with different Cw using SEM. We also discussed the influence of the microstructure of adsorbed polymer layers on particles and their interactions in the dis- persing medium on the stability of suspension. Then two different stable states and two different unstable states for 3.-TZP suspension were given. Accordingly, the (Cw, η), (Cw, α), and (α, η) two-parameter, and (Cw, α, η) three-parameter stability maps were con- structed. Based on the DLVO theory calculations, the dispersant concentration, particle distance (r), and interparticle potential energy (VT) maps with various solids loading for 3.-TZP aqueous suspension were also constructed. In (Cw, r) two-parameter coordinate system, the stable motion region map for particles was established. The Cw, α, and VT,max (the highest potential energy) surface of the potential barrier map was obtained through calculation and simulation on the basis of the surfaces of Cw, r, VT maps introduced above. The (Cw, α) two-parameter stability map was then obtained from the Cw, α, VT,max map. The results showed that this theoretical map can qualitatively prove the experimentally obtained results—the existence of different dispersed states of particles in suspension system and the variation tendency of suspension stability with changing each parame- ter—were reasonable.

关键词： 3.-TZP, suspension, stability, DLVO theory, interparticle potential energy.

A novel endorectal RF coil for high resolution MRI and spectroscopy of the prostate

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Progress in Natural Science:Materials International 2005年第5期15卷 472-476页

作者： ZHANG Hongjie 1.2. SONG Xiaoyu1. WANG Xiaoying3. XU Pingfang1.and BAO Shanglian1.*(1. {1. Key Laboratory of Medical Physics & Engineering, Peking university, {1. 1.0871. China 2. Navy General Hospital, {1. 1.003., China 3. Peking university First Hospital, {1. 1.003., China) beijing Key Lab. of Med. Phys. and Eng. Peking Univ. Beijing 100871 China Navy General Hospital Beijing 100037 China Peking Univ. First Hospital Beijing 100034 China

The diagnosis of prostate diseases by magnetic resonance imaging (MRI) in vivo is sometimes difficult for the lower signal to noise ratio (SNR). To increase the SNR of the prostate image, we designed a RF coil that can be inserted into rectum and was named endorectal coil. The properties of RF coil were evaluated using a network analyzer. Moreover the images and spectroscopy of a special phantom were acquired and the results were compared to those of the commercial TORSO coil (G.E. Medical Systems, USA). Our coil gave a significantly higher SNR at the region of interest (ROI). The achieved high local SNR and resulting high spatial resolution would add more anatomic and biochemical information to the diagnosis of prostate diseases.

关键词： MRI RF coil endorectal coil.

Mineralogy and crystal structure determination of Mg-fillowite

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Science China Earth Sciences 2005年第5期48卷 635-646页

作者： MA Zhesheng 1., SHI Nicheng 1.& YE Danian 2.1. China {1. of geosciences, {2. 1.0083. China 2. Institute of geology, Chinese Academy of Sciences, {2. 1.002., China China university of {1.sciences Beijing China Institute of geology Chinese Academy of Sciences Beijing China

Accurate crystal structure determination of complex phosphate Mg-fillowite ? Na2.a(Mn4Mg2.e)7[PO4]6 has been finished. Mg-fillowite occurs in muscovite-pegmatite in the Altay area, Xinjiang, China. It is of the trigonal lattice, with space group R-3. unit cell a=1.51.3.3. nm, c=4.3.2}1.2. nm, V=8.573. nm3. Z = 1.. The R-factor of the determination accuracy is R (I > 2. ( I )) = 0.0776. The cationic polyhedra consist of two kinds of structural units: compound col- umn and screw column. In three-dimensional space, they are linked with each other through corner sharing or edge sharing to build the entire structure. There are 45 atoms in an asymmetric unit and 72. atoms in a unit cell. In terms of types and connection manners of the coordination polyhedra, the degree of complicity is rarely seen in all mineral crystal structures. Study of such a structure is significant for the classification of phosphate and the building rule of coordination polyhedra in a complex crystal structure.

关键词： Mg-fillowite, complex phosphate, crystal structure, coordination polyhedron.

一石二鸟：工业机器人何以推动减污降碳与经济增长协同发展

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济南大学学报(社会科学版) 2024年

作者：李建强何志文王长松 1.南昌大学经济管理学院 2.南昌大学中国中部经济社会发展研究中心 3.江西省农业科学院农业经济与信息研究所南昌大学经济管理学院南昌大学中国中部经济社会发展研究中心江西省农业科学院农业经济与信息研究所

技术进步是推动减污降碳与经济增长协同共进的关键。工业机器人作为先进技术资本的典型代表，成为当代实现环境与经济双赢目标的重要突破口。基于2.1.-2.1.年的城市面板数据，测算减污降碳与经济增长协同绩效（3.绩效），并实证分析工... 详细信息

技术进步是推动减污降碳与经济增长协同共进的关键。工业机器人作为先进技术资本的典型代表，成为当代实现环境与经济双赢目标的重要突破口。基于2.1.-2.1.年的城市面板数据，测算减污降碳与经济增长协同绩效（3.绩效），并实证分析工业机器人对城市3.绩效的影响及其作用机制。研究发现：(1.工业机器人能显著提升城市3.绩效，这一结果在运用计划生育政策作为工具变量等一系列检验后依然稳健；(2.工业机器人主要通过技能互补效应和技术创新效应影响城市3.绩效，而劳动生产率效应尚未显现；(3.在劳动力丰裕城市、低市场干预城市与高创新投入城市，工业机器人对3.绩效的促进效应更为明显。其中，劳动力禀赋不足是劳动生产率效应失位的重要原因，且市场干预和创新投入的不同会导致技能互补效应和技术创新效应的差异。

关键词：工业机器人减污降碳经济增长 3.绩效

北京市规划和自然资源委员会北京市体育局印发《关于规范和加强新建充气膜体育建筑规划管理工作的指导意见(试行)》的通知(京规自发〔2.2.〕3.2}号)

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北京市人民政府公报 2024年第12期 48-52页

作者： 1.北京市规划和自然资源委员会 2.北京市体育局北京市规划和自然资源委员会北京市体育局

市规划自然资源委各分局、各区体育局:为进一步规范和加强我市充气膜体育建筑管理,防范安全隐患,提高服务水平,市规划自然资源委会同市体育局起草了《关于规范和加强新建充气膜体育建筑规划管理工作的指导意见(试行)》,现予以印发,请认... 详细信息

市规划自然资源委各分局、各区体育局:为进一步规范和加强我市充气膜体育建筑管理,防范安全隐患,提高服务水平,市规划自然资源委会同市体育局起草了《关于规范和加强新建充气膜体育建筑规划管理工作的指导意见(试行)》,现予以印发,请认真遵照执行。

关键词：规范和加强自然资源充气膜体育局提高服务水平北京市意见

Calculating soil moisture by remote sensing and analyzing hydrologic cycle process in the Yellow River basin

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Science China(Technological Sciences) 2004年第Z1期47卷 1-13页

作者： YANG Shengtian1.& LIU Changming1. 2.1. School of Environmental Sciences, {1. Normal university, {1. 1.0875, China 2. Institute of geographic Science and Natural Resources Research, {1. 1.01.1. China School of Environmental Sciences Beijing Normal University Beijing China Institute of geographic Science and Natural Resources Research Beijing China

Based on the AVHRR pathfinder remote sensing data, soil moisture, precipitation and evaporation during the period of 1.82.1.98, soil moisture of all layers of soil-profile (0—1.m) in the Yellow River basin over the 1. years are calculated by the remote sensing model of calculating soil water. The Yellow River basin is divided into seven subcatchments as control sections at the location of six hydrologic stations (Lanzhou, Toudaoguai, Longmen, Sanmenxia, Huayuankou and Lijin). After calculating soil moisture and obtaining runoff data and precipitation data, the dynamical features of hydrological cycle in the Yellow River basin are analyzed for the period from 1.82.to 1.88 using water balance method. The conclusions are as follows: It is feasible to calculate the soil water on the macro-scale, in the soil profile with temporal continuity by means of remote sensing and survey in land. Some values of the key water cycle factors in the Yellow River are obtained, which include the annual precipitation of 4000 km3. the evapotranspiration of 3.00-3.00 km3. and the soil moisture transformation of ?500- 500 km3. Consequently, we analyzed the process of the water cycle in the Yellow River over the 1. years, and the results show that the segment upstream of Lanzhou city is a relatively humid region, and the area of internal waters and the reaches of Shanshan is the most desiccated region. Therefore, the runoff in the depth process is intensive and the runoff-generating process is weak in more arid regions.

关键词： the Yellow River, soil moisture, remote sensing, hydrologic cycle.

Key technology of mine underground mobile positioning based on LiDAR and coded sequence pattern

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中国有色金属学会会刊：英文版 2011年第S3期21卷 570-576页

作者： WANG Zhi1. 2. WU Li-xin1. 2. LI Hui-ying3.1. College of Resources and Civil Engineering, Northeastern university, Shenyang 1.0004, China 2. Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs and Ministry of Education, beijing Normal university, beijing 1.0875, China 3. College of Computer Science and Technology, Jilin university, Changchun 1.001.0} China College of Resources and Civil Engineering Northeastern University Shenyang 110004 China Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs and Ministry of Education Beijing Normal University Beijing 100875 China College of Computer Science and Technology Jilin University Changchun 130012 China

Technologies of underground mobile positioning were proposed based on LiDAR data and coded sequence pattern landmarks for mine shafts and tunnels environment to meet the needs of fast and accurate positioning and navigation of equipments in the mine underground without satellite navigation signals. A coded sequence pattern was employed for automatic matching of 3. scans. The methods of SIFT feature, Otsu segmentation and fast hough transformation were described for the identification, positioning and interpretation of the coded sequence patterns, respectively. The POSIT model was presented for speeding up computation of the translation and rotation parameters of LiDAR point data, so as to achieve automatic 3. mapping of mine shafts and tunnels. The moving positioning experiment was applied to evaluating the accuracy of proposed pose estimation method from LiDAR scans and coded sequence pattern landmarks acquired in an indoor environment. The performance was evaluated using ground truth data of the indoor setting so as to measure derivations with six degrees of freedom.

关键词： LiDAR coded sequence pattern mobile positioning SLAM algorithm POSIT algorithm