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Phosphatic microspherules and their geobiological implications from the Frasnian-Famennian transition at the Yangdi section, Guilin, South china

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Science china Earth Sciences 2014年第6期57卷 943-956页

作者： huang cheng GONG YiMing State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

Abundant perfectly-preserved phosphatic microspherules have been discovered across the Frasnian-Famennian （F-F） transition from the Yangdi section in Guilin, Guangxi, South china. They are mostly spherical or elliptical in shape and about 150 gin in diameter with smooth exterior surfaces. Each microspherule consistently possesses a small dimple on the surface. The internal texture of microspherules consists of concentric light-colored apatite and dark-colored organic matter bands alternating around a central core. conodonts have also been found preserved together with phosphatic microspherules in the same horizon, and the abundance of the former is obviously higher than that of the latter. Laser Raman spectral studies show close similarities in spectral patterns between the outer shells of phosphatic microspherules and the blade of the conodont genus Palmatolepis sp., as well as between the microspherule nucleus and the platform of the same conodont genus. Furthermore, the statistical results and geochemical data demonstrate that the elevated abundance of phosphatic microspherules roughly coincides with the blooms of bacteria and algae, but is later than the sharp increase of oceanic nutrients. The phosphatic microspherules are inter- preted here to be the ＇otoliths＇ secreted by conodont animals based on the compositional similarities between phosphatic mi- crospherules and conodonts and their interrelated abundances. In addition, an analogous study reveals morphological and tex- tural similarities between fish otoliths and phosphatic microspherules. The formation of phosphatic microspherules is probably related to seawater eutrophication. We speculate that the explosive growth of bacteria and algae is probably caused by the en- richment of nutrients that is most likely associated with the increase of terrestrial inputs, submarine hydrothermal activities or the upwelling anoxic bottom waters in the late Devonian, which would stimulate the conodont animals to secrete

关键词： microspherules conodont animal otoliths eutrophication Devonian F-F South china

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Major government customer and management earnings forecasts

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Frontiers of Business Research in china 2020年第3期14卷 350-369页

作者： Agnes c.S.cheng Wenli huang Shaojun Zhang School of Accounting and Finance Faculty of BusinessThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

This paper examines whether customer base composition in the US,that is,whether a firm's major customers are government entities or publicly traded companies,affects the properties of its management earnings forecasts(MEFs).Using a sample of 1,168 MEFs from 1998 to 2014,we find that firms whose major customers are government entities(i.e.,govemment suppliers)issue more precise and more accurate MEFs than firms whose major customers are public companies(i.e.,corporate suppliers).Moreover,when managers disclose negative information to the market,earnings forecasts issued by government suppliers have greater price impact than those issued by corporate ***,our empirical results suggest that having major govemment customers has a positive impact on the quality of MEFs.

关键词： customer-supplier relationship Demand uncertainty Government supplier Information spillover Management earnings forecasts(MEFs)

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Geometric and analytic problems for a real submanifold in c^n with cR singularities

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Science china Mathematics 2017年第6期60卷 995-1004页

作者： huang Xiaojun Department of Mathematics Rutgers University New Brunswick NJ 08903 USA

In this survey article, we present some known results and also propose some open questions related to the analytic and geometric aspects of Bishop submanifolds in a complex space. We mainly focus on those problems that the author and his coauthors have recently worked on. The article also contains an example of a Bishop submanifold in c^3 of real codimension two, which cannot be quadratically flattened at a cR singular point but is cR non-minimal at any cR point. This provides a counter-example to a question asked in a private communication by Zaistev(2013).

关键词： cR singular points Bishop invariants local hull of holomorphy hyperbolic structure Levi-flat hypersurfaces holomorphic disks

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Microstructure and Internal Friction Behavior of Laser 3D Printed Fe-Based Amorphous composites

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 196-204页

作者： Shuilong huang Qingjun chen Li Ji Kan Wang Guosheng huang School of Material Science and Engineering Nanchang Hangkong UniversityNanchang330063China State Key Laboratory for Marine corrosion and Protection Luoyang Ship Material Research Institute(LSMRI)Qingdao266237China

Laser 3D printing,also known as laser additive manufacturing(LAM),is favored for its ability to form bulk metallic glass(BMG)and its composite materials(BMGcs)with freeform *** this work,two different kinds of Fe_(41)co_(7)cr_(15)Mo_(14)c_(15)B_(6)Y_(2)amorphous coatings(A and B)were prepared by using LAM technology under air-and water-cooled conditions,respectively;meanwhile,to reduce the cracks generated due to the residual thermal stresses,coating c obtained by air-sweep annealing of B with a low energy-density *** morphology and amorphous content and microstructure of the coatings were investigated,the results show many cracks in coating B deposited under water-cooled conditions,and its microstructure shows an amorphous-crystal-nanocrystalline mixed *** was suppressed in coating c,obtained by air-sweep annealing based on coating B,but the amorphous content was reduced from 32.6 to 13.4%.And the hardness and corrosion resistance of the coating will increase with the increase in the amorphous ***,the internal friction behavior of a BMGcs was prepared on the basis of the process of sample c is compared with that of as-cast amorphous *** results show that the low temperature internal friction behavior of BMGcs is affected by the defects produced during printing,and the high temperature internal friction behavior is affected by the precipitated hard phase.

关键词： Laser 3D printing Amorphous coating Microstructure corrosion resistance Internal friction behavior

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Reliability-based multidisciplinary design optimization using incremental shifting vector strategy and its application in electronic product design

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Acta Mechanica Sinica 2018年第2期34卷 285-302页

作者： Z.L.huang Y.S.Zhou c.Jiang J.Zheng X.Han School of Mechanical and Electrical Engineering Hunan City University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle Engineering Hunan University

Use of multidisciplinary analysis in reliabilitybased design optimization(RBDO) results in the emergence of the important method of reliability-based multidisciplinary design optimization(RBMDO). To enhance the efficiency and convergence of the overall solution process,a decoupling algorithm for RBMDO is proposed ***, to decouple the multidisciplinary analysis using the individual disciplinary feasible(IDF) approach, the RBMDO is converted into a conventional form of RBDO. Secondly,the incremental shifting vector(ISV) strategy is adopted to decouple the nested optimization of RBDO into a sequential iteration process composed of design optimization and reliability analysis, thereby improving the efficiency significantly. Finally, the proposed RBMDO method is applied to the design of two actual electronic products: an aerial camera and a car pad. For these two applications, two RBMDO models are created, each containing several finite element models(FEMs) and relatively strong coupling between the involved disciplines. The computational results demonstrate the effectiveness of the proposed method.

关键词： Reliability-based design optimization(RBDO) Multidisciplinary design optimization(MDO) Incremental shifting vector(ISV) Decoupling algorithm Electronic product

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A Specific Peptide Vaccine Against IDH1(R132H) Glioma

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Neuroscience Bulletin 2022年第2期38卷 223-225页

作者： Yuqian huang Yongjie Wang Zhihui huang college of Pharmacy Department of NeurosurgeryThe Affiliated HospitalHangzhou Normal UniversityHangzhou 311121ZhejiangChina Key Laboratory of Elemene class Anti-cancer chinese Medicines Engineering Laboratory of Development and Application of Traditional Chinese MedicinesCollaborative Innovation Center of Traditional Chinese Medicines of Zhejiang ProvinceHangzhou Normal UniversityHangzhou 311121ZhejiangChina

Malignant tumors of the central nervous system(cNS)have the poorest prognosis among the *** are the most commonly occurring tumors of the cNS[1],accounting for almost 30%of all primary brain tumors and 80%of all malignant brain tumors[2].In 2016,the World Health Organization(WHO)assigned gliomas into four grades(I-IV)based on molecular parameters and light microscopic features[3];WHO grade I is the least malignant while grade IV is the *** cells are believed to be derived from neuroglial stem or progenitor cells,and are characterized by active growth,strong invasion and rapid *** on morphological similarities to the neuroglial cell types found in the normal brain,gliomas are histologically classified into astrocytomas,oligodendrogliomas,mixed oligoastrocytic gliomas,and ependymomas.

关键词： IDH1 invasion Glioma

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The Auslander-type condition of triangular matrix rings

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Science china Mathematics 2012年第8期55卷 1647-1654页

作者： huang chongHui huang ZhaoYong School of Mathematics and Physics University of South China Hengyang 421001 China Department of Mathematics Nanjing University Nanjing 210093 China

Let R be a left and right Noetherian ring and n, k be any non-negative integers. R is said to satisfy the Auslander-type condition Gn（k） if the right fiat dimension of the （i ＋ 1）-th term in a minimal injective resolution of RR is at most i ＋ k for any 0 ≤ i ≤ n - 1. In this paper, we prove that R is Gn（k） if and only if so is a lower triangular matrix ring of any degree t over R.

关键词： Auslander-type condition triangular matrix rings, fiat dimension, minimal injective resolutions,mlnlm^l A.t r^nlllti^n~

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Oxidation of As(Ⅲ) by potassium permanganate

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Journal of Environmental Sciences 2007年第7期19卷 783-786页

作者： LI Na FAN Maohong Van Leeuwen Johannes Saha Basudeb YANG Hongqun huang c. P. Department of civil Construction and Environmental Engineering Center for Sustainable Environmental Technology Iowa State University Ames Iowa 50011 USA. center for Sustainable Environmental Technology Iowa State University Ames Iowa 50011 USA Department of chemistry Iowa State University Ames Iowa 50011 USA Department of chemical and Materials Engineering University of Alberta Edmonton Alberta T6G 2G6 Canada Department of civil and Environmental Engineering University of Delaware Newark DE 19716 USA

The oxidation of As（Ⅲ） with potassium permanganate was studied under conditions including pH, initial As（Ⅲ） concentration and dosage of Mn（Ⅶ）. The results have shown that potassium permanganate was an effective agent for oxidation of As（Ⅲ） in a wide pH range. The pH value of tested water was not a significant factor affecting the oxidation of As（Ⅲ） by Mn（Ⅲ）. Although theoretical redox analyses suggest that Mn（Ⅶ） should have better performance in oxidization of As（Ⅲ） within lower pH ranges, the experimental results show that the oxidation efficiencies of As（Ⅲ） under basic and acidic conditions were similar, which may be due to the adsorption of As（Ⅲ） on the Mn（OH）2 and MnO2 resulting from the oxidation of As（Ⅲ）.

关键词： arsenite arsenate oxidation potassium permanganate

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LOcAL c-cOSINE FAMILY THEORY AND APPLIcATION

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chinese Annals of Mathematics,Series B 1995年第2期16卷 213-232页

作者： huang FALUN huang TINGWEN SIcHUAN UNIV DEPT MATHCHENGDU 610064PEOPLES R CHINA

This paper introduces the concept of local c-cosine family and inverstigate its basic properties. In particular,a characterization of the complete infinitesimal generator of a local c-cosinefacely is *** an application of this theory to the second order abstract cauchy problems,a characterization of the local c-well-posedness of these problems is given in terms of thelocal c-cosine family theory.

关键词： Local c-cosine family Asymptotic c-cosine resolvent complete generator Second order cauchy problem.

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A Two-Level Additive Schwarz Preconditioner for Local c^0 Discontinuous Galerkin Methods of Kirchhoff Plates

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communications on Applied Mathematics and computation 2019年第2期1卷 167-185页

作者： Jianguo huang Xuehai huang School of Mathematical Sciences and MOE-LSCShanghai Jiao Tong UniversityShanghai 200240China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China

A two-level additive Schwarz preconditioner based on the overlapping domain decomposition approach is proposed for the local c0 discontinuous Galerkin (LcDG) method of Kirchhoff *** with the help of an intergrid transfer operator and its error estimates,it is proved that the condition number is bounded by O(1 + (H4/δ4)),where H is the diameter of the subdomains and δ measures the overlap among *** for some special cases of small overlap,the estimate can be improved as O(1 + (H3/δ3)).At last,some numerical results are reported to demonstrate the high efficiency of the two-level additive Schwarz preconditioner.

关键词： Kirchhoff plate c^0 discontinuous Galerkin Two-level additive Schwarz preconditioner Intergrid transfer operator

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