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一种高泛化能力的神经网络气动力降阶模型

空气动力学学报 2017年第2期35卷 205-213页

作者：尹明朗寇家庆张伟伟西北工业大学翼型叶栅空气动力学国家重点实验室陕西西安710072 布朗大学工程学院美国普罗文登02906

神经网络模型的泛化能力是指模型对于新样本的适应能力,而当前基于神经网络的非线性气动力模型往往泛化能力不足。针对这一局限,发展了一种基于计算流体力学的带验证信号气动力降阶模型,用于跨声速气动力预测。采用递归径向基函数神经网... 详细信息

神经网络模型的泛化能力是指模型对于新样本的适应能力,而当前基于神经网络的非线性气动力模型往往泛化能力不足。针对这一局限,发展了一种基于计算流体力学的带验证信号气动力降阶模型,用于跨声速气动力预测。采用递归径向基函数神经网络,通过引入差分进化算法,对模型中隐含层神经元宽度进行优化,优化目标为验证信号的均方根误差最小。训练信号采用结构大幅振荡的位移和气动力响应,用小扰动下微幅运动的信号作为验证信号。算例表明建立的降阶模型不仅具有比全阶数值模拟更短的计算时长,并且由于采用了小幅运动的验证信号,使模型在不同频率和振幅下的泛化能力得到增强。

关键词：非定常气动力降阶模型神经网络泛化能力验证信号

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退变性脊柱侧凸主弯区的退变程度分析

中国组织工程研究 2025年第15期29卷 3206-3214页

作者：王明朗蒋琳宋彬张力张强冯大雄资阳市雁江区人民医院脊柱外科四川省资阳市641300 西南医科大学附属医院脊柱外科四川省泸州市646000

背景:退变性脊柱侧凸的发病机制不清,主弯区非对称退变可能与侧凸发生、发展紧密相关,充分认识主弯区的退变有助于为临床治疗策略提供更多参考。目的:探讨退变性脊柱侧凸主弯区退变程度与脊柱骨盆参数之间的关系,了解其发病机制。方法:... 详细信息

背景:退变性脊柱侧凸的发病机制不清,主弯区非对称退变可能与侧凸发生、发展紧密相关,充分认识主弯区的退变有助于为临床治疗策略提供更多参考。目的:探讨退变性脊柱侧凸主弯区退变程度与脊柱骨盆参数之间的关系,了解其发病机制。方法:收集西南医科大学附属医院脊柱外科2018年7月至2023年11月就诊的退变性脊柱侧凸患者的病历及影像学资料。比较顶椎上、下关节突关节凹侧、凸侧关节炎的差异;分析脊柱侧凸严重程度、脊柱骨盆参数、关节突关节炎等参数之间的相关性;探究脊柱侧凸严重程度、脊柱骨盆参数、关节突关节炎等参数之间的影响作用。结果与结论:①在顶椎关节突关节中,凹侧比凸侧关节突关节炎严重,差异有显著性意义(P<0.001);在顶椎同侧(凹侧或凸侧)上关节突关节炎比下关节突关节炎严重,差异有显著性意义(P<0.001);②骨盆入射角随着腰椎前凸角减小而减小(rs=0.509,P<0.001);顶椎侧方骨赘差值随着腰椎前凸角减小而增加(rs=-0.285,P=0.033);关节突关节不对称角随着骨盆入射角减小而增加(rs=-0.379,P=0.004);③L5倾斜角、椎间盘角度是主弯Cobb角增大的危险因素(B=1.012,P<0.001;B=0.620,P=0.016);骨盆入射角是主弯Cobb角增大的保护因素(B=-0.264,P=0.003);④提示退变性脊柱侧凸顶椎区域凹侧退变程度重于凸侧;顶椎关节突关节不对称角及关节突关节炎严重程度与脊柱侧凸严重程度无明显相关性;腰椎前凸角和骨盆入射角在维持脊柱正常序列中发挥关键作用,且骨盆入射角是主弯Cobb角增大的保护因素;L5倾斜角和椎间盘角度是主弯Cobb角增大的危险因素。

关键词：退变性脊柱侧凸主弯区顶椎不对称退变关节突关节炎

Structure and Oriented Growth of CoCr Films With Amorphous Ti Underlayer

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Chinese Physics Letters 1994年第8期11卷 506-509页

作者： YAN minglang GENG Shengli YANG Zheng Institute of Physics Academia SinicaBeijing 100080 Research Institute of Magnetic Materials Lanzhou UniversityLanzhou 730000

CoCr films with and without amorphous Ti underlayers were deposited by rf magnetron *** studied the growth characteristics and the dispersion of crystallographic orientation of CoCr films over a thickness range from 20 to 600nm.A 20nm-thick CoCr film with Ti underlayer possesses hcp structure and its c-axis is normal to the film ***,the CoCr flim without Ti underlayer is *** their structure are amorphous or hcp texture,the Ti underlayers always promote preferred orientation of CoCr films at the early growth stage.

关键词： amorphous film CoCr

Surface texturing for adaptive Ag/MoS_2 solid lubricant plating

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Rare Metals 2012年第6期31卷 560-565页

作者： Huang Zhongjia Liu minglang Xiong Dangsheng Li Jianliang Anhui Polytech Univ Anhui Key Lab High Performance Nonferrous Met Mat Wuhu 241000 Peoples R China Nanjing Univ Sci & Technol Dept Mat Sci & Engn Nanjing 210094 Jiangsu Peoples R China

The objective of this research is to prepare specially designed surface texture on hard steel surface by electrochemical micromachining (EM) and to incorporate electroless plated Ag/MoS2 solid lubricant coating into the dimples of EM textured steel surface to effectively reduce friction and wear of steel-steel contacts. The friction and wear behavior of the Ag/MoS2 solid lubricant coating on EM textured steel surface was evaluated in relation to the size and spacing of the dimples thereon. The microstructure of as-plated Ag/MoS2 solid lubricant coating and the morphology and elemental composition of the worn coating surface and counterface steel surface were analyzed by means of optical microscopy, scanning electron microscopy, and energy dispersive spectrometry. It is found that electroless plated Ag/MoS2 coating is able to greatly reduce the friction and wear of the EM textured steel disc coupled with GCr15 steel ring, mainly because of the formation of solid self-lubricating layer on the EM textured steel surface and of transferred lubricating film on counterface steel surface. The diameter and spacing of the dimples are suggested as 500 μm for acquiring the best wear resistance of the hard steel discs after electrochemical micromachining treatment and electroless plating of Ag/MoS2 solid lubricating coating.

关键词： hard steel electrochemical micromachining surface texturing electroless plating Ag/MoS2 lubricating coating behavior friction and wear

Giant Magnetoresistance of Fe/Ag Multilayer Films with Ultrathin Fe Layers

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Chinese Physics Letters 1994年第12期11卷 775-777页

作者： LI Shuxiang YU Chengtao YAN minglang LAI Wuyan WANG Yizhong State Key Laboratory for Magnetism Institute of PhysicsAcademia SinicaBeijing 100080

A giant magnetoresistive effect in as-deposited Fe/Ag multilayer films with ultrathin Fe layers has been *** magnetoresistance in this system is presented first as a function of Fe layer thickness *** sample with Fe layer thickness of 4Åexhibits a magnetoresistance ratio as large as 14.3%at *** magnetoresistance ratio decreases approximately an order of magnitude with increasing tFe from 4 to 10Åand then changes slightly with further increasing *** the hysteresis loop measurement,it is found that the interlayer coupling changes from antiferromagnetic to ferromagnetic with increasing *** feature of material at the interface might be responsible for all these findings.

关键词： magnetoresistance slightly ferromagnetic

Photoluminescence manipulation in two-dimensional transition metal dichalcogenides

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Journal of Materiomics 2023年第4期9卷 768-786页

作者： minglang Gao Lingxiao Yu Qian Lv Feiyu Kang Zheng-Hong Huang Ruitao Lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055China

Two-dimensional transition metal dichalcogenides(TMDCs)have been regarded as an intriguing platform for exploring novel physical phenomena and optoelectronic devices due to their excitonic emission characteristics derived from the atomic thin thickness and reduced dielectric screening ***,monolayer TMDCs with a direct bandgap exhibiting strong photoluminescence(PL)are promising candidates for the light-emitting devices,while the interlayer excitons in heterostructures hold great potential for the photonic chips and optical communication ***,the non-ideal photoluminescent intensity and quality due to the ultrathin thickness and high defect density of experimentally obtained monolayer TMDCs limit the further development for the light-emission ***,we summarize the research progress on the PL manipulation of the excitonic emission in TMDCs,where the PL intensity enhancement and emission wavelength regulation are *** concept and characteristics of excitons are overviewed firstly,followed by the discussion on the evaluation and characterization of excitonic *** state-of-the-art progress on the manipulation of the neutral excitons and interlayer excitons PL are then ***,the challenges and prospects are proposed.

关键词： 2D materials TMDCs Neutral exciton Interlayer exciton Photoluminescence enhancement

Status　Analysis　and　Improvement　Proposal　of　Control　System　for　Sinusoidal　Power　Supplies

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IMP & HIRFL Annual Report 1996年第1期 104-106页

作者： Chen minglang

ＳｔａｔｕｓＡｎａｌｙｓｉｓａｎｄＩｍｐｒｏｖｅｍｅｎｔＰｒｏｐｏｓａｌｏｆＣｏｎｔｒｏｌＳｙｓｔｅｍｆｏｒＳｉｎｕｓｏｉｄａｌＰｏｗｅｒＳｕｐｐｌｉｅｓ￥ＣｈｅｎＭｉｎｇｌａｎｇＴｈｅｓｉｎｕｓｏｉｄａｌｐｏｗｅｒ... 详细信息

ＳｔａｔｕｓＡｎａｌｙｓｉｓａｎｄＩｍｐｒｏｖｅｍｅｎｔＰｒｏｐｏｓａｌｏｆＣｏｎｔｒｏｌＳｙｓｔｅｍｆｏｒＳｉｎｕｓｏｉｄａｌＰｏｗｅｒＳｕｐｐｌｉｅｓ￥ＣｈｅｎＭｉｎｇｌａｎｇＴｈｅｓｉｎｕｓｏｉｄａｌｐｏｗｅｒｓｕｐｐｌｉｅｓｉｎＳＦＣａｒｅｖ...

关键词： System Control Analysis

GLTSCR1 coordinates alternative splicing and transcription elongation of ZO1 to regulate colorectal cancer progression

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Journal of Molecular Cell Biology 2022年第2期14卷 43-55页

作者： Fengyan Han Beibei Yang Mingyue Zhou Qiong Huang minglang Mai Zhaohui Huang Maode Lai Enping Xu Honghe Zhang Department of Pathology and Women’s Hospital Zhejiang University School of MedicineResearch Unit of Intelligence Classification of Tumor Pathology and Precision TherapyChinese Academy of Medical Sciences(2019RU042)Hangzhou 310058China Cancer Epigenetics Program Wuxi School of MedicineJiangnan UniversityWuxi 214122China Key Laboratory of Disease Proteomics of Zhejiang Province Zhejiang UniversityHangzhou 310058China Cancer Center Zhejiang UniversityHangzhou 310058China Department of Pharmacology China Pharmaceutical UniversityNanjing 210009China

Alternative splicing(AS)and transcription elongation are vital biological processes,and their dysregulation causes multiple diseases,including ***,the coregulatory mechanism of AS and transcription elongation in tumors remains *** study demonstrates a novel AS pattern of tight junction protein 1(ZO1)regulated by the RNA polymerase II elongation rate in colorectal cancer(CRC).Glioma tumor suppressor candidate region gene 1(GLTSCR1)decreases the transcription elongation rate of ZO1 to provide a time window for binding of the splicing factor HuR to the specific motif in intron 22 of ZO1 and spliceosome recognition of the weak 3 and 5 splice sites in exon 23 to promote exon 23 *** exon 23 inclusion in ZO1 suppresses migration and invasion of CRC cells,our findings suggest a novel potential therapeutic target for CRC.

关键词： colorectal cancer alternative splicing transcription elongation GLTSCR1

Improvement of Control for High Voltage DC Power Supplies

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IMP & HIRFL Annual Report 1995年 84-85页

作者： Chen minglang and Wang Renhe

Ｉｍｐｒｏｖｅｍｅｎｔ　ｏｆ　Ｃｏｎｔｒｏｌ　ｆｏｒ　Ｈｉｇｈ　Ｖｏｌｔａｇｅ　ＤＣ　Ｐｏｗｅｒ　ＳｕｐｐｌｉｅｓＩｍｐｒｏｖｅｍｅｎｔｏｆＣｏｎｔｒｏｌｆｏｒＨｉｇｈＶｏｌｔａｇｅＤＣＰｏｗｅｒＳｕｐｐｌｉｅｓ￥Ｃ...

Ｉｍｐｒｏｖｅｍｅｎｔ　ｏｆ　Ｃｏｎｔｒｏｌ　ｆｏｒ　Ｈｉｇｈ　Ｖｏｌｔａｇｅ　ＤＣ　Ｐｏｗｅｒ　ＳｕｐｐｌｉｅｓＩｍｐｒｏｖｅｍｅｎｔｏｆＣｏｎｔｒｏｌｆｏｒＨｉｇｈＶｏｌｔａｇｅＤＣＰｏｗｅｒＳｕｐｐｌｉｅｓ￥ＣｈｅｎＭｉｎｇｌａｎｇａｎｄＷａｎ...

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