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A Fusion Localization Method Based on Target Measurement Error Feature Complementarity and Its Application

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Journal of Beijing Institute of Technology 2024年第1期33卷 75-88页

作者： Xin Yang hongming Liu Xiaoke Wang Wen yu Jingqiu Liu Sipei Zhang Shanghai Electro-Mechanical Engineering Institute Shanghai Academy of Spaceflight TechnologyShanghai 201109China

In the multi-radar networking system,aiming at the problem of locating long-distance targets synergistically with difficulty and low accuracy,a dual-station joint positioning method based on the target measurement error feature complementarity is *** dual-station joint positioning,by constructing the target positioning error distribution model and using the complementarity of spatial measurement errors of the same long-distance target,the area with high probability of target existence can be ***,based on the target distance information,the midpoint of the intersection between the target positioning sphere and the positioning tangent plane can be solved to acquire the target's optimal positioning *** simulation demonstrates that this method greatly improves the positioning accuracy of target in azimuth *** with the traditional the dynamic weighted fusion(DWF)algorithm and the filter-based dynamic weighted fusion(FBDWF)algorithm,it not only effectively eliminates the influence of systematic error in the azimuth direction,but also has low computational ***,for the application scenarios of multi-radar collaborative positioning and multi-sensor data compression filtering in centralized information fusion,it is recommended that using radar with higher ranging accuracy and the lengths of baseline between radars are 20–100 km.

关键词： dual-station positioning feature complementarity information fusion engineering applicability

Numerical simulation of groundwater under complex karst conditions and the prediction of roadway gushing in a coal mine:a case study in the Guang'an Longtan Reservoir in Sichuan Province, China

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Acta Geochimica 2016年第1期35卷 72-84页

作者： Jiang Chengxin Shi Huapeng Li Ya yu hongming Faculty of Engineering China University of Geosciences

Numerical simulation of groundwater in karst areas has long been restricted by the difficulty of generalizing the hydrogeological conditions of reservoirs and of determining the relevant parameters due to the anisotropy and discontinuity of the karst water-bearing media in these areas. In this study, we used the Guang'an Longtan Coal mine in Sichuan as an example, and generalized the complex hydrogeological conditions in the reservoir area. A finite element numerical flow model was used to simulate current and future scenarios of roadway gushing at the bottom of the coal mine at pile number 1 + 700 m. The results show that the roadway section corresponding to valleys has a gushing quantity of 4323.8–4551.25 m^3/d before impoundment. Modeled water inflow after impoundment increased to 1.6 times the water inflow before impoundment, which threatens the impoundment as well as the roadway's normal operation. Therefore, roadway processing measures are needed to guarantee the safety of the impoundment and of the mining operation.

关键词：地下水数值模拟喀斯特地区煤矿巷道广安市四川水文地质条件蓄水安全市区

Synthesis and electrochemical performance of YF_3-coated LiMn_2O_4 cathode materials for Li-ion batteries

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Rare Metals 2011年第1期30卷 39-43页

作者： CAO Jina CAO Gaoshao yu hongming XIE Jian ZHAO Xinbing Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Spinel LiMn2O4 cathodes were coated with 1 mol% YF3.X-ray diffraction（XRD） analyses showed that Y and/or F did not enter the lattice of the LiMn2O4 *** electron microscopy（TEM） showed that a compact YF3 layer of 5-20 nm in thickness was coated onto the surface of LiMn2O4 *** electron microscopy（SEM） observation showed that the YF3 coating caused the agglomeration of LiMn2O4 *** cycling test demonstrated that the YF3 coating can improve the electrochemical performance of LiMn2O4 at both 20 and 55°***,YF3-coated LiMn2O4 exhibited an improved rate capability compared with the uncoated one at high rates over *** immersion test in electrolytes showed that YF3-coated LiMn2O4 is more erosion resistant than the uncoated one.

关键词： lithium batteries coatings cathodes electrochemical properties

Preparation of Nano-structured LiFe_xMn_(1-x)PO_4(x=0,0.2,0.4) by Reflux Method and Research on the Influences of Fe(Ⅱ) Substitution

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Journal of Materials Science & Technology 2012年第9期28卷 823-827页

作者： Zhao Yang hongming yu Chunyang Wu Gaoshao Cao Jian Xie Xinbing Zhao Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Nano structured LiFexMn1-xPO4 （x=0, 0.2, 0.4） materials were successfully prepared by one-step reflux method in a water/PEG400 mixed solvent, and were coated by carbon using glucose as the precursor. The materials were characterized by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM） and transmission electron microscopy （TEM）. The electrochemical properties of the materials were investigated by galvanostatic cycling, cyclic voltammetry （CV） and electrochemical impedance spectroscopy （EIS）. It was found that the materials consisted of nanorods with a diameter of 50 nm and a length of 500 nm. Galvanostatic cycling showed that the capacity of LiMnPO4 could be largely increased by Fe2＋ substitution. At a current rate of C/20, the capacity of the three samples （x=0, 0.2, 0.4） were 47, 107 and 150 mA-h.g-1, respectively. CV result showed that the Fe2＋ substitution could decrease the polarization during charging/discharging, ac- celerating the electrochemical process. EIS result showed that the Fe2＋ substitution could decrease the charge transfer resistance between the electrode and electrolyte, as well as increase the Li-ion diffusion coefficient in the bulk material, resulting in an improved electrochemical performance.

关键词： LiFexMn1-xPO4 Reflux method Carbon coating Cyclic voltammetry (CV) Electrochemical impedance spectroscopy (EIS)

Doping Effects on Electronic Conductivity and Electrochemical Performance of LiFePO_4

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Journal of Materials Science & Technology 2009年第3期25卷 405-409页

作者： Jiezi Hu Jian Xie Xinbing Zhao hongming yu Xin Zhou Gaoshao Cao Jiangping Tu State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Department of Chemistry Mie University 1577 Kurimamachiyacho Tsu Mie 514-8507 Japan

Olivine-structured pure LIFePO4 and doped LI（M, Fe）PO4 （M=La, Ce, Nd, Mn, Co, Ni） have been synthesized by a solvothermal method. X-ray diffraction and field emission scanning electron microscopy analyses indicate that the as-prepared LiFePO4 is well-crystallized nanopowders without any detectable impurity phases. The electronic conductivity of LiFePO4 is enhanced by around 1-3 orders by doping. It was found that doping alone is not sufficient for the high-rate performance of LiFePO4 and surface coating with such as carbon should be needed. The best dopant for LiFePO4 is Nd among those studied in the present work. Accordingly, doping with 1 mol fraction Nd leads to an increase in 70 mAh/g at 0.1 C for the hydrothermally synthesized sample and 50 mAh/g at 1.0 C after carbon-coating in comparison with the undoped samples.

关键词： Lithium iron phosphate Doping Conductivity Hydrothermal synthesis

Generic Interpretable Reaction Condition Predictions with Open Reaction Condition Datasets and Unsupervised Learning of Reaction Center

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Research 2024年第2期2023卷 773-794页

作者： Xiaorui Wang Chang-yu Hsieh Xiaodan Yin Jike Wang yuquan Li Yafeng Deng Dejun Jiang Zhenxing Wu Hongyan Du hongming Chen yun Li Huanxiang Liu yuwei Wang Pei Luo Tingjun Hou Xiaojun Yao Dr.Neher's Biophysics Laboratory for lnnovative Drug Discovery State Key Laboratory of Quality Research in Chinese MedicineMacao Institute for Applied Research in Medicine and HealthMacao University of Science and TechnologyMacao999078China innovation Institute for Artificial Intelligence in Medicine of Zhejiang University College of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China Faculty of Applied Sciences Macao Polytechnic UniversityMacao999078China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou730000China Carbon Silicon AI Technology Co. LtdHangzhouZhejiang 310018China Center of Chemistry and Chemical Biology Guangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou 510530China College of Pharmacy Shaanxi University of Chinese MedicineXianyangShaanxi712044China

Effective synthesis planning powered by deep learning(DL)can significantly accelerate the discovery of new drugs and ***,most DL-assisted synthesis planning methods offer either none or very limited capability to recommend suitable reaction conditions(RCs)for their reaction ***,the prediction of RCs with a DL framework is hindered by several factors,including:(a)lack of a standardized dataset for benchmarking,(b)lack of a general prediction model with powerful representation,and(c)lack of *** address these issues,we first created 2 standardized RC datasets covering a broad range of reaction classes and then proposed a powerful and interpretable Transformer-based RC predictor named *** careful design of the model architecture,pretraining method,and training strategy,Parrot improved the overall top-3 prediction accuracy on catalysis,solvents,and other reagents by as much as 13.44%,compared to the best previous model on a newly curated ***,the mean absolute error of the predicted temperatures was reduced by about 4℃.Furthermore,Parrot manifests strong generalization capacity with superior cross-chemical-space prediction *** analysis indicates that Parrot effectively captures crucial chemical information and exhibits a high level of interpretability in the prediction of *** proposed model Parrot exemplifies how modern neural network architecture when appropriately pretrained can be versatile in making reliable,generalizable,and interpretable recommendation for RCs even when the underlying training dataset may still be limited in diversity.

关键词： versatile absolute generalization

Experimental study on enhancement of the metastatic potential of portal vein tumor thrombus-originated hepatocellular carcinoma cells using portal vein serum

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Chinese Journal of Cancer Research 2014年第5期26卷 588-595页

作者： yufu Tang hongming yu Long Zhang Kang Wang Weixing Guo Jie Shi Shupeng Liu Mengchao Wu Hongyang Wang Shuqun Cheng Eastern Hepatobiliary Surgery Hospital Second Military Medical University Department of Hepatobiliary Surgery General Hospital of Shenyang Military Area Command Changhai Hospital Second Military Medical University International Cooperation Laboratory on Signal Transduction of Eastern Hepatobiliary Surgery Institute Second Military Medical University

Objective： Portal vein metastasis of hepatocellular carcinoma（HCC） results in a poor prognosis and seriously affects the survival rate of patients. The mechanism underlying the formation of portal vein tumor thrombus（PVTT） is complex and is not yet fully understood. This study was conducted to investigate the impact of portal vein blood on the proliferation, metastasis, invasion and apoptosis of PVTT cells and to explore its possible mechanisms, which was expected to lay a foundation for ascertaining the mechanism underlying the portal vein metastasis of HCC.Methods： Peripheral blood and portal vein blood were collected from patients with HCC, and the sera from these two sources were used to culture the PVTT-originated HCC cell line CSQT-2. The cells were collected after 24 h, and flow cytometry was performed to detect cell proliferation, cell cycle stages and apoptosis. Transwell migration and invasion assays were applied to detect the metastasis and invasion of the cells in each group. The changes in the expression of MMP-2 and MMP-9 in cells were detected via Western blotting. The contents of IL-12, IFN-γ, IL-1β, IL-2 and TNF-α in the two groups of sera were quantified using corresponding kits. Results： Compared with the group of cells cultured with peripheral serum, the cells cultured with portal vein serum showed significantly lower apoptosis（P〈0.01）, significantly enhanced cell metastasis and invasion（P〈0.01）, whereas cell proliferation and the stages of the cell cycle did not differ significantly（P〉0.05）. A significantly increased expression level of MMP-2 has been observed in tumor cells treated portal vein serum. In addition, compared with peripheral serum, the content of IL-12 was significantly decreased in portal vein serum（P〈0.05）, while the contents of IFN-γ, IL-1β, IL-2, and TNF-α did not differ significantly（P〈0.05）. Conclusions： Portal vein serum from HCC patients could inhibit the apoptosis of PVTT-originated HCC cells and promote cell metasta

关键词： Hepatocellular carcinoma(HCC) portal vein portal vein tumor thrombus(PVTT) metastasis

Effect Blasting Excavation of yujiapeng Tunnel on Stability of Nearby Giant Dangerous Rock Masses (DRM)

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Journal of China University of Geosciences 2001年第2期12卷 142-144页

作者： yu hongming Hu Yanxin Engineering Faculty, China University of Geosciences, Wuhan 430074 Engineering Faculty China University of Geosciences

On the basis of the interpretation of engineering geology of the tunnel and of its adjacent dangerous rock masses (DRM), this paper presents the energy and vibration parameters of the explosion that propagates in different blasting modes according to the experimental formulas now usually employed. Then the stability checking computation of T 8-T 12 area, the most dangerous area of DRM, is conducted under the limited blasting condition and with the limited equilibrium method. The result shows that the effect on the stability is only 5.5 % and that this area also contains certain safety reserves.

关键词： blast energy propagation vibration parameters safety reserves.

网络环境下高校图书馆文献流通服务创新策略探究

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大学（研究与管理） 2022年第10期 23-26页

作者：于宏明咸阳师范学院图书馆陕西咸阳712000

高校图书馆是大学生开展自主学习、拓展知识层次与视野的主要场所,高校图书馆收藏的文献资料是广大师生丰富思想内涵的主要源泉。然而,高校图书馆职能作用的发挥,在很大程度上依赖于高校图书馆文献流通服务水平。对此,高校图书馆需要依... 详细信息

高校图书馆是大学生开展自主学习、拓展知识层次与视野的主要场所,高校图书馆收藏的文献资料是广大师生丰富思想内涵的主要源泉。然而,高校图书馆职能作用的发挥,在很大程度上依赖于高校图书馆文献流通服务水平。对此,高校图书馆需要依据广大师生对文献资料的实际需求,及时开展服务创新,使各项文献流通服务举措更好地服务于高校教育,促进育人质量的全面提升。文章分析了网络环境对高校图书馆文献流通服务的影响、特点以及二者之间的对应关系,针对网络环境下高校图书馆文献流通服务创新策略进行了相关探究,提出了相应措施建议,以期切实发挥高校图书馆的育人职能,推动我国高等人才培养质量的全面提升。

关键词：网络环境下高校图书馆文献流通服务创新策略