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石油大学学报（自然科学版） 2001年第6期25卷 99-104页

作者：张崇高石油大学数理系北京102200

以LR型Fuzzy数空间的距离为基础 ,给出了Fuzzy变量的Fuzzy线性回归模型的未知参数的最小二乘估计 ,论述了未知参数在FLR(R) 中的计算方法。

关键词：回归模型 LR型Fuzzy数 LR型Fuzzy数空间距离最小二乘估计

Two-stage extraction by partial grinding of impacted mandibular third molar in close proximity to the inferior alveolar nerve

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World Journal of Clinical Cases 2024年第10期12卷 1728-1732页

作者： Guang-Ming Luo zhang-Shun Yao Wei-Xiang Huang Lei-Yan Zou Yan Yang Kunbaida Outpatient department Kunming Medical University School and Hospital of StomatologyKunming 650106Yunnan ProvinceChina Yunnan Key Laboratory of Stomatology Kunming 650106Yunnan ProvinceChina

BACKGROUND Extraction of impacted third molars often leads to severe complications caused by damage to the inferior alveolar nerve(IAN).AIM To proposes a method for the partial grinding of an impacted mandibular third molar(IMM3)near the IAN to prevent IAN injury during IMM3 *** Between January 1996 and March 2.2.,2. patients with IMM3 roots near the IAN were *** first stage of the operation consisted of grinding a major part of the IMM3 crown with a high-speed turbine dental drill to achieve sufficient space between the mandibular second molar and *** 6 months,when the root tips were observed to be away from the IAN on X-ray examination,the remaining part of the IMM3 was completely *** All IMM3s were extracted easily without symptoms of IAN injury after *** Partial IMM3 grinding may be a good alternative treatment option to avoid IAN injury in high-risk cases.

关键词： Partial grinding Impacted mandibular third molar Inferior alveolar nerve Cone-beam computed tomography

CT引导下经皮肺穿刺活检术并发症发生的影响因素分析

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中国肺癌杂志 2024年第3期27卷 179-186页

作者：王星张洪张逊天津市胸科医院影像科天津300051 天津市胸科医院胸外科天津300051

背景与目的计算机断层扫描引导下经皮肺穿刺活检术(computed tomography guided percutaneous lung biopsy,CT-PLB)是目前临床广泛应用的肺部病变诊断方式,但其为有创检查,最常见的并发症为气胸和肺出血,严重时可危及生命。本研究旨在... 详细信息

背景与目的计算机断层扫描引导下经皮肺穿刺活检术(computed tomography guided percutaneous lung biopsy,CT-PLB)是目前临床广泛应用的肺部病变诊断方式,但其为有创检查,最常见的并发症为气胸和肺出血,严重时可危及生命。本研究旨在分析影响CT-PLB不同并发症发生的独立危险因素,以降低并发症发生率。方法回顾性分析2.18年5月至2.19年12.于我院行CT-PLB且临床资料完整的605例患者的资料。依病变位置分为胸膜下组和非胸膜下组,根据并发症分为气胸组、肺出血组、气胸合并肺出血组及无气胸/肺出血组,计算各并发症的发生率。分析影响不同并发症发生的危险因素及各并发症的独立危险因素。结果气胸发生率为34.1%,肺出血发生率为2..1%,同时发生气胸及肺出血63例,发生率为10.8%。影响胸膜下组气胸发生的独立危险因素为病变大小(P=0.002.。影响非胸膜下组气胸发生的独立危险因素为穿刺针走行区域平扫CT值(P=0.035)、穿刺针经过肺组织长度(P=0.003)、穿刺针经过胸壁厚度(P=0.02.);影响非胸膜下组肺出血发生的独立危险因素为穿刺针经过肺组织长度(P<0.001)、穿刺针走行区域△CT值(P=0.001)、病变大小(P=0.034)及患者体位(P=0.014)。影响气胸、肺出血同时发生的独立危险因素为穿刺针经过肺组织长度(P<0.001)、穿刺针走行区域△CT值(P<0.001)。结论 CT-PLB是一种安全、有效的诊断方式,对肺部占位性病变具有较高的诊断价值,选择合适的穿刺方案可减少气胸、肺出血等并发症,提高诊疗效率。

关键词：肺肿瘤活检计算机断层扫描气胸肺出血

稀土含硫有机配体配合物的合成与应用研究进展

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中国稀土学报 2004年第3期22卷 299-306页

作者：章伟光殷霞范军张启交黄庙由华南师范大学化学系广东广州510631 华南理工大学高分子材料科学与工程系广东广州510641

简要综述了稀土含硫有机配体配合物的常用合成方法 ,概述了该类型配合物在橡胶硫化、摩擦学、稀土农用和医药等领域的潜在应用 ,并指出了稀土含硫配合物今后的研究重点。

关键词：合成方法应用稀土配合物

晋西黄土区8种典型林分降雨再分配特征与影响因素

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应用生态学报 2024年第6期35卷 1553-1563页

作者：胡旭付照琦王彪田沁瑞葛艳灵林峰高雅洁张志强陈立欣北京林业大学水土保持学院北京100083 山西吉县森林生态系统国家野外科学观测研究站山西吉县042200

为揭示黄土区冠层降雨再分配的潜在分配特征,本研究以晋西黄土区8种典型林分(油松林、刺槐林、侧柏林、油松-刺槐混交林、侧柏-刺槐混交林、辽东栎林、山杨林和辽东栎-山杨混交林)为研究对象,探究降雨再分配过程并利用增强回归树(BRT)... 详细信息

为揭示黄土区冠层降雨再分配的潜在分配特征,本研究以晋西黄土区8种典型林分(油松林、刺槐林、侧柏林、油松-刺槐混交林、侧柏-刺槐混交林、辽东栎林、山杨林和辽东栎-山杨混交林)为研究对象,探究降雨再分配过程并利用增强回归树(BRT)模型量化林分结构和气象环境因子的相对贡献,并根据BRT模型提取的最具影响力的因素进行多元回归,同时利用挖掘数据进行模拟验证预测模型。结果表明:研究区8种典型林分的穿透雨、树干茎流和冠层截留占降雨量的比例分别为2..5%~95.1%、0~13.6%和0.7%~55.7%;产生穿透雨的单次降雨阈值中,针叶林(3.06±1.2. mm)显著高于阔叶林(1.97±0.52.mm),但与针阔混交林无显著差异(3.01±0.98 mm);产生树干茎流的单次降雨阈值中,不同组成林分中无显著差异。BRT模型中,对于穿透雨和树干茎流,林分结构因子的影响占比较小,而对于冠层截留,林分结构因子则占主导地位;降雨量是决定穿透雨和树干茎流最重要的因素;树高是决定冠层截留最重要的因素,降雨量、冠幅面积、胸径和林分密度分列其后。对比一般线性函数和幂函数,本研究建立的BRT预测模型对穿透雨和树干茎流的预测效果有所提升,对冠层截留的预测仍需探究。综上,BRT模型可较好定量化评估林分结构和气象环境因子对降雨再分配各组分的影响,且所建预测模型模拟效果良好,可为制定林木配置优化策略提供科学依据。

关键词：穿透雨树干茎流冠层截留增强回归树相对影响

Pedestrian attribute classification with multi-scale and multi-label convolutional neural networks

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High Technology Letters 2018年第1期24卷 53-61页

作者：朱建清 Zeng Huanqiang zhang Yuzhao Zheng lixin Cai Canhui Fujian Academic Engineering Research Centre in Industrial Intellectual Techniques and Systems College of Engineering Huaqiao University Quanzhou 362021 P. R. China School of Information Science and Engineering Huaqiao University Xiamen 361021 P. R. China

Pedestrian attribute classification from a pedestrian image captured in surveillance scenarios is challenging due to diverse clothing appearances,varied poses and different camera views. A multiscale and multi-label convolutional neural network( MSMLCNN) is proposed to predict multiple pedestrian attributes simultaneously. The pedestrian attribute classification problem is firstly transformed into a multi-label problem including multiple binary attributes needed to be classified. Then,the multi-label problem is solved by fully connecting all binary attributes to multi-scale features with logistic regression functions. Moreover,the multi-scale features are obtained by concatenating those featured maps produced from multiple pooling layers of the MSMLCNN at different scales. Extensive experiment results show that the proposed MSMLCNN outperforms state-of-the-art pedestrian attribute classification methods with a large margin.

关键词： pedestrian attribute classification multi-scale features multi-label classification convolutional neural network (CNN)

Characterization of distinct microbiota associated with androgenetic alopecia patients treated and untreated with platelet-rich plasma(PRP)

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Animal Models and Experimental Medicine 2024年第2期7卷 106-113页

作者： Qian zhang Yanan Wang Cheng Ran Yingmei Zhou Zigang Zhao Tianhua Xu Hongwei Hou Yuan Lu Beijing Life Science Academy BeijingChina department of Pathology Affiliated Hospital of Hebei UniversityBaodingChina department of Otolaryngology Affiliated Hospital of Hebei UniversityBaodingChina department of Dermatology Huazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina department of Dermatology Hainan Hospital of PLA General HospitalSanyaChina department of Chemical Engineering Tsinghua UniversityBeijingChina

Background:Androgenic alopecia(AGA)is the most common type of hair loss in men,and there are many studies on the treatment of hair loss by platelet-rich plasma(PRP).The human scalp contains a huge microbiome,but its role in the process of hair loss remains unclear,and the relationship between PRP and the microbiome needs further ***,the purpose of this study was to investigate the effect of PRP treatment on scalp microbiota ***:We performed PRP treatment on 14 patients with AGA,observed their clinical efficacy,and collected scalp swab samples before and after *** scalp microflora of AGA patients before and after treatment was characterized by amplifying the V3-V4 region of the 16 s RNA gene and sequencing for bacterial ***:The results showed that PRP was effective in the treatment of AGA patients,and the hair growth increased *** results of relative abundance analysis of microbiota showed that after treatment,g_Cutibacterium increased and g_Staphylococcus decreased,which played a stable role in scalp *** addition,g_Lawsonella decreased,indicating that the scalp oil production decreased after ***:The findings suggest that PRP may play a role in treating AGA through scalp microbiome rebalancing.

关键词： androgenic alopecia microbiome platelet-rich plasma scalp

Search for strong gravitational lensing effect in the current GRB data of BATSE

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Science china(Physics,Mechanics & Astronomy) 2014年第8期57卷 1592-1599页

作者： LI ChunYu LI lixin department of Astronomy Peking University Kavli Institute for Astronomy and Astrophysics Peking University

Because gamma-ray bursts （GRBs） trace the high-z universe, there is an appreciable probability for a GRB to be gravitational lensed by galaxies in the universe. Herein we consider the gravitational lensing effect of GRBs contributed by the dark matter halos in galaxies. Assuming that all halos have the singular isothermal sphere （SIS） mass profile in the mass range 101~h 1Mo 〈 M 〈 2.10^13h^-1M and all GRB samples follow the intrinsic redshift distribution and luminosity function derived from the Swift LGRBs sample, we calculated the gravitational lensing probability in BATSE, Swift/BAT and Fermi/GBM GRBs, re- spectively. With an derived probability result in BATSE GRBs, we searched for lensed GRB pairs in the BATSE5B GRB Spectral catalog. The search did not find any convincing gravitationally lensed events. We discuss our result and future obser- vations for GRB lensing observation.

关键词： star formation galactic halos gravitational lenses and luminous arcs γ-ray sources γ-ray bursts cosmology

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DNA芯片在0-1规划问题中的应用

生物化学与生物物理进展 2003年第3期30卷 412-415页

作者：张凤月殷志祥许进华中科技大学控制科学与工程系武汉430074

生物芯片技术和DNA计算分别是近年来生命科学与信息科学的新兴研究领域 ,对信息高度并行的获取与处理是二者的本质特性 .而 0 1规划问题作为运筹学中一个重要的问题 ,到目前为止还没有好的算法 .在DNA计算和DNA芯片基础上 ,提出了基于... 详细信息

生物芯片技术和DNA计算分别是近年来生命科学与信息科学的新兴研究领域 ,对信息高度并行的获取与处理是二者的本质特性 .而 0 1规划问题作为运筹学中一个重要的问题 ,到目前为止还没有好的算法 .在DNA计算和DNA芯片基础上 ,提出了基于DNA芯片解决 0 1规划问题的DNA计算新模型 ,与以往DNA计算模型相比 ,该模型具有高信息量和操作易自动化的优点 .

关键词： DNA芯片应用信息科学 0-1规划问题

Effects of human umbilical cord serum on proliferation and insulin content of human fetal islet-like cell clusters

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Hepatobiliary & Pancreatic Diseases International 2004年第1期3卷 144-148页

作者： Dong Xia, Hong-Yuan He, Zheng-Ming Lei, Pei-Ming zhang and Yong Guo Luzhou, china {2. of General Surgery, West china Hospital , and {2. of Surgery, Fifth Hospital of Sichuan Province , Chengdu 610041, china {2. of Histology and Em- bryology , and Hepatobiliary and Pancreatic Laboratory , Luzhou Medical College, Luzhou 646000, china department of General Surgery West China Hospital Chengdu 610041 China. juliahhy@***

BACKGROUND: Type 1 diabets is an autoimmune disease caused by the destruction of pancreatic β-cell with an in- creased incidence worldwide in the closing decades of the 2.th century. This study was to investigate the effects of human umbilical cord serum (UCS) on the proliferation and function of human fetal islet-like cell clusters (ICCs) in vitro. METHODS: Eight fresh pancreatic glands obtained after in- duction of labor with water bag were mildly exposed to col- lagenase V, and the digested cells were cultured in a RPMI- 1640 medium plus 10% pooled UCS or fetal calf serum (FCS) to permit cells attachment and outgrowth of ICCs. RESULTS: In 8 consecutively explanted glands, develop- ment and proliferation of ICCs were observed. In the pre- sence of FCS, the outgrowth of ICC took place on the top of a flbroblast monocellular layer. UCS affected less growth of fibroblasts and increased the formation of ICCs about four-fold compared with explants from the same glands maintained in FCS. In both UCS and FCS, the insulin con- tent of the medium was variable to a certain extent and progressively declined from day 2.to day 6. Dithizone- stained ICCs in UCS suggested that most cell clusters were islet cells ( β-cells), and the purity of islets was estimated 80%-90%. The ultrastructure of the cultured cells showed a large number of granule-containing cells, most of which were identified as β-cells. CONCLUSION: We conclude that in comparison with ex- plants with FCS, the yield of ICCs and purification of islet cells are markedly increased by UCS and may facilitate the proliferation of pancreatic β-cells intended for islet trans- plantation.

关键词： islet cell culture islet-like cells clusters umbilical cord serum fetal calf serum