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An Improved SASS Model for Sea Clutter Reflectivity at Ku-band

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An Improved SASS Model for Sea Clutter Reflectivity at Ku-ba...

Investigation of single MoFe3S4 cubane cluster——I. First successful synthesis by spontaneous self-assembly reaction and structure of （Et4N） [MoFe3S4（Et2NCSS）5]CH3CN

作者： jia-fei ZHAO Hong-min GAO Rong-kun jiaNG Xue-tian WANG School of Information and Electronics Beijing Institute of Technology

The typical models, namely, Hybrid（HYB） model, Technology Service Corporation（TSC） model, and Naval Research Laboratory（NRL） model, reveal a large deviation at medium and high grazing angles that leads to an inaccurate prediction of sea clutter backscattering coefficient, owing to a limitation of the measured Nathanson data. An improved model for sea clutter reflectivity is proposed as a function of grazing angle, azimuth direction, radar polarization and wind speed, based on the SEASAT-A Satellite Scatterometer（SASS） model with sufficient measured data at Ku-band. To deal with the redundant structure of SASS model, the improved SASS model is developed to simplify the calculation of mean backscatter coefficients of sea clutter. In addition, the design algorithm of the improved SASS model, as well as the model usage method is presented. The reliability of the improved SASS model is proved by comparisons with Nathanson models and measured sea clutter data.

关键词： HYB TSC NRL Medium and high grazing angles Sea clutter backscattering coefficient The improved SASS model Ku-band

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Chinese Journal of Chemistry 1986年第2期4卷 107-115页

作者： LIU Qiu-tian* HUANG Liang-Ren KANG Bei-Sheng LIU Chun-Wan WANG Ling-Ling LU jia-Xi, Fujian Institute of Research on the Structure of Matter, Academia Sinica, Fuzhou Fujian Institute of Research on the Structure of Matter Academia Sinica Fuzhou

A single MoFe3S4cubane-like cluster compound has been synthesized through spon-taneous self-assembly of simple inorganic salts with organosulfur ligand for the first time. （Et4N）-[MoFe3S4（Et2NCSS）5]CH3CN（1） is quite stable in air. The crystal of 1 is monoclinic with spacegroup P21/c, a=22.897（3）,b=12.399（2）,c=20.928（4）,β=97.15（1）°, and Z=4. A fullmatrix least-squares refinement with 6725 unique reflections for all nonhydrogen atoms givesR=0.068. The anion of 1 is the first isolated single MoFe3S4cubane cluster with core oxidation state [Mo-Fe3S4]4+. The distance between the two 6-coordinate metal atoms （Mo,Fe） is 2.624 , which isthe shortest M-M'bond observed for Mo-Fe-S clusters so far and the only one shorter than sim-ilar distances in FeMo-cofactor. The bond orders of this anion were calculated by EHMO method and the results coincide withthe general rule. The structural feature and the unusual stability of 1 can be attributed to the bidentatechelating effect of Et2NCSS-, which leads to high coordination of metal atoms and the various ligatedtypes.

关键词： First successful synthesis by spontaneous self-assembly reaction and structure of Et4N Investigation of single MoFe3S4 cubane cluster Et2NCSS CN

Thermal Simulation and Experimental Validation of FSEC Lithium-ion Battery Packs

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Thermal Simulation and Experimental Validation of FSEC Lithi...

2023中国汽车工程学会年会暨展览会

作者： tian Mingshuo Luo Qiao Xue Moxuan jia Xin Li jiacheng Kang Zhe Chongqing University College of Mechanical and Vehicle Engineering Chongqing University State Key Laboratory of Mechanical Transmissions

With the rapid popularization of new energy vehicles around the world,Chinese college formula racing competitions are increasingly receiving widespread attention from college *** the core component of electric racing cars,the thermal safety of lithium battery systems deserves in-depth *** thermal modeling,real-time and effective thermal monitoring,and thermal management are crucial for the safe,efficient,and reliable operation of battery *** article will take the battery system of pure electric racing cars as the research object,combined with FSEC dynamic competition,through experimental and theoretical combination,select battery cells and design modules.A new battery box is designed through CATIA,and the best battery box is obtained through ANSYS static and thermodynamic *** rationality of the battery box is verified through experiments and actual vehicle *** a series of experiments,it is found that the consistency of each battery cell is relatively *** terms of capacity,the capacity of the actual vehicle decreases by 5% during running,which can effectively complete the cycle durability working *** to the temperature chart,in an environment of 20℃,the temperature rise of the electric vehicle during running does not exceed 25℃,and the temperature difference is 4.5℃,which is consistent with the simulation model of battery box heat dissipation and meets the requirements of good heat dissipation.

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基于空气网络法的管路系统及阀门计算模型

工程热物理学报 2017年第9期38卷 1889-1895页

作者：孙科刘高文马春田牛嘉嘉西北工业大学动力与能源学院西安710072 东方汽轮机有限公司德阳618000

空气网络法因其快速实用的特点,计算得到空气网络中各截面各种参数,在航空发动机空气系统的计算研究中得到广泛应用。将空气网络法的思想应用到压缩空气供应系统中,其中主要有阀门、管道、局部损失等主要元件。因原有程序中没有阀门计... 详细信息

空气网络法因其快速实用的特点,计算得到空气网络中各截面各种参数,在航空发动机空气系统的计算研究中得到广泛应用。将空气网络法的思想应用到压缩空气供应系统中,其中主要有阀门、管道、局部损失等主要元件。因原有程序中没有阀门计算方法,首先建立阀门的计算模型,通过实验得到阀门的流量特性,形成计算方法,写入空气网络程序中。设计了一种新型数据结构来表达空气网络,重新编写了面向对象语言程序。使用空气网络程序计算不同阀门开度工况下管路的流量及重要截面上的参数,并与实验值进行对比,偏差很小,从而验证计算方法的准确可信,由此得到压缩气体供应系统的空气网络模型,应用于管路系统调控中。进行空气网络计算,根据实验台所需的气体流量及状态参数得到所需阀门的开度,快速调整阀门到所需位置。

关键词：空气网络阀门管路系统数据结构

A novel biological sources consistency evaluation method reveals high level of biodiversity within wild natural medicine:A case study of Amynthas earthworms as"Guang Dilong"

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Acta Pharmaceutica Sinica B 2023年第4期13卷 1755-1770页

作者： Zhimei Xing Han Gao Dan Wang Ye Shang Tenukeguli Tuliebieke Jibao jiang Chunxiao Li Hong Wang Zhenguo Li Lifu jia Yongsheng Wu Dandan Wang Wenzhi Yang Yanxu Chang Xiaoying Zhang Liuwei Xu Chao jiang Luqi Huang Xiaoxuan tian State Key Laboratory of Component-Based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal UniversityNanjing 210023China School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China Mudanjiang YouBo Pharmaceutical Co.Ltd. Mudanjiang 157000China Guizhou Ruihe Pharmaceutical Co.Ltd. Guizhou 550000China State Key Laboratory of Dao-di Herbs National Resource Center for Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100010China

For wild natural medicine,unanticipated biodiversity as species or varieties with similar morphological characteristics and sympatric distribution may co-exist in a single batch of medical materials,which affects the efficacy and safety of clinical *** barcoding as an effective species identification tool is limited by its low sample throughput *** this study,combining DNA minibarcode,DNA metabarcoding and species delimitation method,a novel biological sources consistency evaluation strategy was proposed,and high level of interspecific and intraspecific variations were observed and validated among 5376 Amynthas samples from 19 sampling points regarded as"Guang Dilong"and 25 batches of proprietary Chinese *** Amynthas aspergillum as the authentic source,8 other Molecular Operational Taxonomic Units(MOTUs)were ***,even the subgroups within *** revealed here differ significantly on chemical compositions and biological ***,this biodiversity could be controlled when the collection was limited to designated areas,as proved by 2796"decoction pieces"*** batch biological identification method should be introduced as a novel concept regarding natural medicine quality control,and to offer guidelines for in-situ conservation and breeding bases construction of wild natural medicine.

关键词： Traditional Chinese medicine "Guang Dilong" Metabarcoding Mini-barcode Subgroup

Clathrin-dependent endocytosis predominantly mediates protein absorption by fat body from the hemolymph in Bombyx mori

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Insect Science 2020年第4期27卷 675-686页

作者： Yu-Jie Wang Shu-Yan Li jia-Ye Zhao Kang Li Jing Xu Xian-Ying Xu Wen-Mei Wu Rong Yang Yang Xiao Ming-Qiang Ye Ji-Ping Liu Yang-Jin Zhong Yang Cao Hui-Yu Yi Ling tian Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding/Guangdong Provincial Sericulture and Mulberry Engineering Research Center College of Animal ScienceSouth China Agricultural UniversityGuangzhouChina Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Institute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhouChina The Sericultural and Agri-Food Research Institute of the Guangdong Academy of Agricultural Sciences GuangzhouChina

During insect larval-pupal metamorphosis,proteins in the hemolymph are absorbed by the fat body for the maintenance of intracellular homeostasis;however,the type of proteins and how these proteins are internalized into the fat body are *** Bombyx mori,the developmental profiles o f total proteins in the hemolymph and fat body showed that hemolymph-decreased protein bands(55-100 kDa)were in accordance with those protein bands that increased in the fat *** o f clathrin-dependent endocytosis predominantly blocked the transportation o f 55-100 kDa proteins from the hemolymph into the fat body,which was further verified by RNA interference treatment o f *** hexamerins were shown to comprise〜90%of the total identified proteins in both the hemolymph and fat body by mass spectrum(MS)*** addition,hemolymphspecific proteins were mainly involved in material transportation,while fat body-specific proteins particularly participated in *** this paper,four hexamerins were found for the first time,and potential proteins absorbed by the fat body from the hemolymph through clathrin-dependent endocytosis were *** study sheds light on the protein absorption mechanism during insect metamorphosis.

关键词： Bombyx mori clathrin-mediated endocytosis fat body hemolymph uptake of proteins

A new ambiguity resolution method applied to uncombined precise orbit determination

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A new ambiguity resolution method applied to uncombined prec...

A comparative study of primary coronary stenting andintravenous thrombolysis for acute myocardial infarctionusing^(99m) Tc-MIBI SPECT imaging

第十一届中国卫星导航年会

作者： tian Zeng Xiaodong Qin Lifen Sui Rengui Ruan Xiaolin jia Guorui Xiao Information Engineering University State Key Laboratory of Geo-Information Engineering China Satellite Launch and Tracking Control Genetal

With the continuous refinement of multi-GNSS and multi-frequency data processing, there is an increasing interest for the observation model based on uncombined(UC) strategy. Ambiguity resolution is im

关键词： Uncombined observation model precise orbit determination GPS wide lane ambiguity MW combination

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Nuclear Science and Techniques 2000年第4期11卷 210-212页

作者： WANG Tie, HU Da-Yi, LI tian-Chang, jia San-Qing (Beijing Chaoyang Hospital, Affiliale of Capital University of Medial Sciences, Beijing 100020 )

The theraputic effectiveness of primary coronary stenting was evaluated and compared with that of intravenous thrombolysis for acute myocardial infarction (AMI) using99m Tc-MIBI myocardial SPECT imaging. 42 patients with AMI were undergone primary coronary stenting (stenting group, 23 patients) or intravenous thrombolysis therapy (thrombolysis group, 19 patients). 99mTc-MIBI myocardium SPECT imaging was performed before and 1 week after steming or thrombolysis therapy. The left ventricular myocardium of each patient was divided into 20 segments. The semiquantitative score of myocardial 99mTc-MIBI uptake was eXPressed with a five-point scoring system: 0 = normal; 1 = equivocal; 2 = mild defect; 3 = severe defect; 4 = absence of activity. The scores of scanning before stenting or intravenous throm-bolysis was SBS. The scores of scaning after stenting or intravenous thrombolysis was SAS. Deducting SAS from SBS was SDS. A comparison was made between the steming group and thrombolysis group: SBS was 41.3+9.8 and 39.4+7.9 (t=1.2, p <0.05); SAS was 17.8+6.4 and 27.3+6.7 (t=5.8, p <0.01); SDS was 24.5+4.2 and 12.2+2.3 (t = 7.3, P <0.01). In the 193 defect segments before stenting, 106 segments (54.9%) restored to normal after steming. In the 149 defect segments before intravenous thrombolysis, 61 segments (40.9%) restored to normal after thrombolysis therapy. Comparing between steming group and thrombolysis group in the improved rate of myocardial perfusion defect scores there was a significant difference (p <0.01). 99mTc-MIBI myocardial SPECT imaging has been proved to be an objective parameter for evaluating the therapeutic effectiveness of the stenting and the intravenous thrombolysis in the treatment of AMI. The results indicated that primary coronary stenting seems to be more effective than intravenous thrombolysis.

关键词： ^99mTc-MIBI 锝99 放射性核素标记溶栓疗法心肌疾病放射性药物心肌显像放射性核素显像诊断

放热率对效率的影响及对HCCI燃烧负荷限值评测

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内燃机学报 2008年第2期26卷 121-127页

作者：韩永强赵佳佳张亮田永海吉林大学内燃机工程系吉林长春130025

基于理论循环和校准后的GT-Power模型研究了燃烧放热率对车用发动机热效率、最高燃烧压力、压力升高率及能量分配的影响规律。理论循环研究表明热效率仅取决于加热时刻相对于上止点的角度,与上止点前后无关,即加热时刻所对应的热效率关... 详细信息

基于理论循环和校准后的GT-Power模型研究了燃烧放热率对车用发动机热效率、最高燃烧压力、压力升高率及能量分配的影响规律。理论循环研究表明热效率仅取决于加热时刻相对于上止点的角度,与上止点前后无关,即加热时刻所对应的热效率关于上止点具有对称性。GT-Power模拟研究表明:实际循环中由于传热、摩擦损失的增加使得放热率对应热效率沿上止点不对称,持续期越长、重心越偏离上止点不对称性越明显;对于HCCI燃烧模式,由于放热持续期很短、且靠近上止点,即使完全在上止点前燃烧其热效率也较高;均质、低温、稀燃燃烧模式,由于加热量直接决定缸内温度及传热量,其负荷拓展受到理论上的限制。

关键词：内燃机燃烧放热率热效率