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Friedrich Ackermann’s scientific research program

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Geo-Spatial Information Science 2023年第2期26卷 141-150页

作者： wolfgang Förstner Department of Photogrammetry UniversityBonnGermany

We sketch Friedrich Ackermann’s research program following the concept of Imre Lakatos,with some historical key developments in the theory and application of aerotriangulation and image *** research program,with its core being statistical estimation theory,has decisively influenced photogrammetry since the 60s,is still fully alive,and a challenge for today’s methods of image *** describe(1)Lakatos’concept of a scientific research program,with its negative and positive heuristics and(2)Ackermann’s research program,clearly made explicit in his PhD,with its mathematical model,the ability to predict theoretical precision and reliability,the potential of analyzing rigorous and approximate method,and the role of *** development of aerotriangulation,later augmented by image matching techniques,is closely connected to Ackermann’s successful attempts to integrate basic research and practical applications.

关键词： Friedrich Ackermann scientific research program aerotriangulation image matching role of theory and application

Unusual Polarization Properties of Supernova Remnant G4.8＋6.2 at 1400MHz

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Chinese Physics Letters 2003年第6期20卷 969-971页

作者： ZHANGXi-Zhen R.G.Strom W.reich NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 AstronomicalInstitute UniversityofAmsterdamNetherlands Max-Planck-InstitutfuerRadioastronomie Postfach202453010BonnGermany

Unusual polarization properties of the high galactic latitude supernova remnant (SNR) G4.8+6.2 are reported. The percentage polarization is larger than 70% over the two main shells of G4.8+6.2 at 1400MHz. It is the second SNR with such high polarization at such a low frequency among the known 225SNRs. We show that this is very unusual for an SNR. Its morphology and polarization are very similar to those of the supernova remnant DA530 (G93.0+6.5), which is another high Galactic latitude SNR.

关键词： Polarization

PREDICTIVE MODELS AND GENERATIVE COMPLEXITY

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Journal of Systems Science & Complexity 2012年第1期25卷 30-45页

作者： wolfgang LHR Max Planck Institute for Mathematics in the Sciences Inselstraβe 22D-04103 LeipziqGermany

The causal states of computational mechanics define the minimal sufficient memory for a given discrete stationary stochastic process. Their entropy is an important complexity measure called statistical complexity （or true measure complexity）. They induce the s-machine, which is a hidden Markov model （HMM） generating the process. But it is not the minimal one, although generative HMMs also have a natural predictive interpretation. This paper gives a mathematical proof of the idea that the s-machine is the minimal HMM with an additional （partial） determinism condition. Minimal internal state entropy of a generative HMM is in analogy to statistical complexity called generative complexity. This paper also shows that generative complexity depends on the process in a nice way. It is, as a function of the process, lower semi-continuous （w.r.t. weak-, topology）, concave, and behaves nice under ergodic decomposition of the process.

关键词： Causal states complexity s-machine generative complexity HMM partially deterministicHMM predictive model statistical.

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Measurement-While-Milling(MWM):An innovative approach for increasing the casing milling efficiency in deep drilling operations

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Petroleum Research 2023年第3期8卷 360-369页

作者： Mohammed A.Namuq Mouhammed Jandal Berro Matthias reich The American University of Kurdistan Petroleum Engineering DepartmentZakho Road42001DuhokKurdistan Region of IraqIraq H.Anger's Sons-Drilling and Well Construction Company Gutenbergstraße 3337235Hessisch LichtenauGermany TU Bergakademie Freiberg Institute of Petroleum EngineeringAgricolastr.2209599FreibergGermany

Deep boreholes are secured by steel tubes(casings)which are run in the hole and cemented in *** most cases,these casings are considered a permanent ***,sometimes they have to be removed in order to repair or abandon the *** the casing is cemented in place,it cannot be pulled,but needs to be milled to small chips which are flushed out of the borehole by the drilling *** of the main challenges in casing milling operations is continuous and complete chip *** the metal chips are too long,chip nests will grow around the milling *** a result,this will restrict the annulus flow area and affect the chip removal in *** obvious solution in such condition is to do round tripping and clean the chip nest which is associated with the risk of injuries,as well as,increasing the none-productive *** the worst case,the poor cleaning and circulation of chips can even end up with the milling string stucking problem in boreholes,consequently long-time fishing *** to the available literatures,hardly any study for identifying the chip shapes and accordingly adapting the operation parameters to the casing milling process environment downhole to keep milling within desired generated chip shapes and sizes could be *** paper presents an encouraging idea to monitor the milling process in real time by utilizing the acoustic emission signals(vibration modes)accompanied with the milling process to identify the desired chip shape and size *** laboratory tests have been carried out to investigate and study the acoustic emission signals accompanying the casing milling process to identify the chip shapes and *** preliminary test results show very good correlation and agreement between the chip length formed during those specific tests and the observed burst events in the measured *** study results have demonstrated the functionality of the new concept,and thus confirmed that it is a very promising idea to

关键词： Oil/Gas well casing milling Measurement while milling Casing milling chips shape detection Acoustic emission accompanied with casing milling operations Casing milling experiments

U-Pb zircon ages for the Luzhenguan Complex in northern part of the eastern Dabie orogen

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Science China Earth Sciences 2005年第9期48卷 1357-1367页

作者： wolfgang Siebe Institut für Geowissenschaften Universit?t Tübingen Tübingen 72074 Germany

The study presents U-Pb zircon ages for granitic gneiss and amphibolite from the Luzhenguan Complex (LZC) in northern part of the eastern Dabie Orogen and their geological significance. Two granitic gneisses and one amphibolite give protolith zircon U-Pb ages of 740 Ma and 725 Ma, respectively. The ages show that the LZC is composed mainly of Neoproterzoic acid and basic igneous rocks, suggesting that there is no Paleozoic active continental marginal rock association in the southern margin of the North China Block in northern part of the eastern Dabie Mountain. Based on the ages and combining the geological and geophysical analyses, the middle-low grade metamorphic rocks in the North Huiyang Belt (NHB) can be divided into three parts, which are the LZC composed mainly of the Neoproterzoic acid and basic igneous rocks, the Neoproterzoic Xianrechong Formation and Xiangyunzhai Formation and the Devonian Zhu- foan Formation and Pangjialing Formation of the Foziling Group, and the suture zone between the Yongtze Block and the North China Block is inferred to be thrust under the NHB.

关键词： Dabie orogen, Luzhenguan Complex, U-Pb zircon age, Neoproterzoic.

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264米的美国魔鬼塔为什么全球登顶者不足百人？

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环球人文地理 2024年第13期 90-97页

作者：李嘉麟 Dan Gary GRP Imagery kellyvandellen Kyle samantha Jacob wolfgang flickr

在美国怀俄明州，有一座不足300米的“矮山”。别看它不高，论起攀登难度，就连珠峰登顶者都对它望洋兴叹。在美国怀俄明州东北部，有一座由火山岩和沉积岩构成的圆柱形岩石塔——魔鬼塔。它矗立在一望无际的草原上，显得格外突兀。谁...

在美国怀俄明州，有一座不足300米的“矮山”。别看它不高，论起攀登难度，就连珠峰登顶者都对它望洋兴叹。在美国怀俄明州东北部，有一座由火山岩和沉积岩构成的圆柱形岩石塔——魔鬼塔。它矗立在一望无际的草原上，显得格外突兀。谁能相信，近百年来，能够登上264米塔顶的登山者不足百人。那么，魔鬼塔是怎么形成的呢？这个问题，让好事者争论了一百多年。

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Eco-environmental surface modelling requires integration of both extrinsic and intrinsic informations

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Science China Earth Sciences 2021年第1期64卷 185-186页

作者： wolfgang HABER Technical University of Munich WZW FacultyFreising D-85354Germany

Extrinsic information,from satellite observations and the outputs of spatial models,and intrinsic information,from ground observations and spatial sampling,provide two different but complementary streams of information about the Earth’s *** extrinsic and intrinsic informations are indispensable for the modelling of the Earth’s surface systems along with an appropriate method for integrating these two kinds of *** on this idea,the fundamental theorem for Earth’s surface system modeling(FTESM)was proposed,from which several corollaries have been deduced,corresponding to spatial interpolation,spatial upscaling,spatial downscaling,data fusion and model-data assimilation,respectively(Yue et al.,2016).

关键词： surface. intrinsic interpolation

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Gluon number fluctuations and diffusive scaling effect

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Frontiers of physics 2011年第1期6卷 100-105页

作者： wolfgang FISCHER Department of Physics Bielefeld University of Applied Sciences Bielefeld 33615 Germany

The diffusive scaling is studied based on pomeron loop equations in the fixed coupling case. At Y 〉〉 YDS, the gluon number fluctuations become important, the geometric scaling is replaced by the diffusive scaling. In the diffusive scaling regime, the deep inelastic scattering （DIS） total scattering cross-section is a function of single variable ln[1/（r^2Qs^2（z））]. We show that the deep inelastic scattering experimental data lie on a single curve, which seems to indicate the existence of the diffusive scaling phenomenology in the deep inelastic scattering.

关键词： gluon number fluctuations proton structure function pomeron loop

STING-ing Pain:How Can Pro-inflammatory Signaling Attenuate Pain?

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Neuroscience Bulletin 2021年第7期37卷 1075-1078页

作者： wolfgang Liedtke Department of Neurology Duke University School of MedicineDurhamNC 27710USA Department of Anesthesiology Duke University School of MedicineDurhamNC 27710USA Department of Neurobiology Duke University School of MedicineDurhamNC 27710USA Duke Neurology Clinics for Headache Head-Pain and Trigeminal Sensory DisordersDurhamNC 27705USA Clinics for Innovative Pain Therapy Department of AnesthesiologyDuke UniversityRaleighNC 27512USA Chair of Neurology Global Scientific Development CouncilRegeneron PharmaceuticalsTarrytownNY 10591USA

Inflammation typically induces pain by producing pro-inflammatory mediators,but increasing evidence also indicates a role for inflammation in the resolution of pain by inducing anti-inflammatory and pro-resolution med... 详细信息

关键词： inflammatory interferon rigorous