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Matched-Cladding Single-Mode Optical Fiber Optimized at 850 nm Wavelength

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光学学报 2003年第S1期23卷 67-69页

作者： Wang honghai, Tu Feng (R&D department of Yangtze Optical Fiber and Cable Co. Ltd., Wuhan, 430072, China R&D department of Yangtze Optical Fiber and Cable Co. Ltd. Wuhan 430072 China

A single-mode optical fiber with quadratic curve index profile in core layer is introduced. The profile is optimized at 850 ran wavelength. The 850 nm bandwidth of this fiber can reach up to 2056.35 ***. This fiber ca... 详细信息

关键词： mode be with of nm Matched-Cladding Single-Mode Optical Fiber Optimized at 850 nm Wavelength

Effects of SBWP Jump-Dealing on China's Book Market from the Perspectives of Competition and Antimonopoly

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China Economist 2014年第1期9卷 98-109页

作者： Yu Li Xu honghai Feng Bo Center for Economic Analysis of Law and Policy Evaluation Tianjin University of Finance and Economics

With the rise of the Internet and E-commence,it has become common for consumers in the book,clothing,electronic appliances,furniture and cosmetic industries to engage in a phenomenon termed"store-browsing-web-purchasing"(SBWP).These are customers who tend to acquire service and information about particular products at traditional(brick and motar)retail stores but purchase them online at a lower *** creates new issues and new perspectives to the science of law and *** paper addresses the issue of SBWP based on the industrial organization theory(especially the vertical dual-pricing system).It then endeavors to demonstrate the three"jump-dealing"theorems of SBWP from analyzing the business models,consumer purchasing patterns and price differences in distributing ***,we extrapolate the theory of jump-dealing and resale price maintenance(RPM)offsetting based on previous *** main conclusions are the following:if a company's RPM strategies substantially eliminate competition,then jump-dealing behavior from consumers shouM be ***,if this jump-dealing behavior from consumers brings about anti-competition and free riding problems,then a company's RPM strategies should be exempted.

关键词： store-browsing-web-purchasing(SBWP) jump-dealing price difference indistributing channels free-ridez resale price maintenance(RPM)

C-H-O Stable Isotope, Elements and Fluid Geochemistry of Uraniferous Leucogranites in Gaudeanmus Area, Southern Central Zone, Damara Orogen, Namibia

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Journal of Geoscience and Environment Protection 2017年第2期5卷 1-18页

作者： Jinyong Chen honghai Fan Shengyun Wang Dazhao Gu Beijing Research Institute of Uranium Geology Beijing China Key Laboratory of Uranium Resource Exploration and Evaluation Technology CNNC Beijing China

This paper focuses on the effect of the later hydrotherm on uraniferous leucogranites and the stages of uranium mineralization. Here, we review C-H-O stable isotope, elements and fluid geochemistry of uraniferous leucogranites in Gaudeanmus, Namibia. The results show that there is significant increasing amount of rare earth element from non-mineralized to uraniferous leucogra-nites, indicating the synchronization of REE enrichment and uranium mineralization. Uranium enrichment may have close relations with Pb, Th, Co, Ni, REE in this region, so REE and U evidently exist homology. There are at least two stages of uranium mineralization by later hydrothermal alteration: firstly, due to magnatic residual high temperature and low salinity fluid, the temperature of main metallogenetic epoch ranges from 470°C to 530°C, salinity ranges from 3.55% to 9.60% NaCleq, and C, H, O stable isotope is -23‰ - -13.6‰, -53.3‰ - -46.4‰, 7.71‰ - 8.81‰, respectively. Secondly, due to superim-posed hydrothermal fluid, the temperature, salinity, and C, H, O stable isotope is 150°C - 220°C, 4.65% - 19.05% NaCleq, -20.3‰ -?-3.7‰, -64.7‰ - -53.6‰, 1.49‰ - 1.99‰, respectively. The fluid for reformation is derived from postmagmatic fluid, mixed with a number of meteoric water.

关键词： Geochemistry C-H-O Stable Isotope Uranium Mineralization Leucogranites Gaudeanmus Damara Belt

Preparation of phosphorus-modified PITQ-13 catalysts and their performance in 1-butene catalytic cracking

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Journal of Energy Chemistry 2014年第2期23卷 193-200页

作者： Penghui Zeng Yun Liang Shengfu Ji Baojian Shen honghai Liu Baojie Wang Hongjuan Zhao Mingfu Li State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum Lanzhou Petrochemical Center Petrochemical Research InstitutePetroChina Company Limited

A series of phosphorus-modified PITQ-13 catalysts was prepared by wet impregnation of NH4H2PO4 solution into an HITQ-13 parent. The catalysts were characterized using XRD, N2 adsorption, MAS NMR and NH3-TPD. Their catalytic performance in 1-butene catalytic cracking was evaluated in a fixed fluidized bed reactor. The results showed that the crystallinity, surface area and pore volume of P-modified PITQ-13 catalysts decreased with the increasing amounts of P. The number of weak acid sites increased, whereas that of strong acidity decreased. The selectivity to propylene in 1-butene cracking reactions increased because of the decrease in strong acidity. The yield of propylene achieved 41.6% over PITQ-13-2 catalyst with a P content of 1.0 wt%, which was 5.1% greater than that achieved over HITQ-13 catalyst.

关键词： ITQ-13 zeolite phosphorus modification 1-butene cracking

An Empirical Study on the Influence of United Front Work in Universities on the Performance of Young Returnee Teachers

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An Empirical Study on the Influence of United Front Work in ...

Metabolic alteration of neuroactive steroids and protective effect of progesterone in Alzheimer's disease-like rats

作者： Hui Wang honghai Chen Chunyan Pan School of Finance Nanjing University of Finance & Economics United Front Department Nanjing University of Finance & Economics

In recent years,the number of young returnee teachers in China's colleges and universities has been increasing *** has become one of the main contents to be considered in the United Front work that how to better promote young returnee teachers to contribute to higher education,serve socialist construction and complete their personal career planning through the United Front *** paper chooses young returnees teachers in colleges and universities as the object of survey,designs questionnaires around the form of united front work,performance evaluation index of university and teaching and research *** empirical research of data,it is found that the United Front Work in colleges and universities has a significant impact on the performance of young returnee teachers,and the teaching and research conditions plays a regulatory role.

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Neural Regeneration Research 2013年第30期8卷 2800-2810页

作者： Sha Liu honghai Wu Gai Xue Xin Ma Jie Wu Yabin Qin Yanning Hou Hebei Medical University Department of Pharmacy Bethune International Peace Hospital of Chinese PLA

A correlation between metabolic alterations of neuroactive steroids and Alzheimer’s disease remains unknown. In the present study, amyloid beta （Aβ） 25-35 （Aβ25-35） injected into the bilateral campus CA1 region significantly reduced learning and memory. At the biochemical level, hippocampal levels of pregnenolone were significantly reduced with Aβ25-35 treatment. Furthermore, progesterone was considerably decreased in the prefrontal cortex and hippocampus, and 17β-estradiol was signifi-cantly elevated. To our knowledge, this is the first report showing that Aβ25-35, a main etiological factor of Alzheimer’s disease, can alter the level and metabolism of neuroactive steroids in the prefrontal cortex and hippocampus, which are brain regions significantly involved in learning and memory. Aβ25-35 exposure also increased the expression of inflammatory mediators, tumor necrosis factor-αand interleukin-1β. However, subcutaneous injection of progesterone reversed the upregulation of tumor necrosis factor-αand interleukin-1βin a dose-dependent manner. Concomitant with improved cognitive abilities, progesterone blocked Aβ-mediated inflammation and increased the survival rate of hippocampal pyramidal cells. We thus hypothesize that Aβ-mediated cognitive deficits may occur via changes in neuroactive steroids. Moreover, our findings provide a possible therapeutic strategy for Alzheimer’s disease via neuroactive steroids, particularly progesterone.

关键词： neural regeneration neurodegenerative disease neuroactive steroids Alzheimer's disease pro-gesterone amyloid beta cognition neuroprotection neuroregeneration

Injectable self-healing hydrogel with siRNA delivery property for sustained STING silencing and enhanced therapy of intervertebral disc degeneration

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Bioactive Materials 2022年第3期7卷 29-43页

作者： Jiaxin Chen Haifeng Zhu Yutao Zhu Chenchen Zhao Shengyu Wang Yixin Zheng Ziang Xie Yang Jin honghai Song Linjun Yang Jin Zhang Jiayong Dai Zhijun Hu Huaiyu Wang Department of Orthopaedic Surgery Sir Run Run Shaw HospitalZhejiang University School of MedicineKey Laboratory of Musculoskeletal System DegenerationRegeneration Translational Research of Zhejiang ProvinceEast Qing Chun RoadHangzhou310016PR China College of Chemical Engineering Fuzhou University2 Xueyuan RoadFuzhou350108PR China Center for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongPR China

Inflammatory responses of nucleus pulposus(NP)can induce imbalanced anabolism and catabolism of extracellular matrix,and the cytosolic dsDNA accumulation and STING-NF-κB pathway activation found in NP inflammation are considered as fairly important cause of intervertebral disc(IVD)***,we constructed a siSTING delivery hydrogel of aldehyde hyaluronic acid(HA-CHO)and poly(amidoamine)PAMAM/siRNA complex to intervene the abnormal STING signal for IVD degeneration treatment,where the formation of dynamic Schiff base bonds in the system(siSTING@HPgel)was able to overcome the shortcomings such as low cellular uptake,short half-life,and rapid degradation of siRNA-based *** not only formed complexes with siRNA to promote siRNA transfection,but also served as dynamic crosslinker to construct hydrogel,and the injectable and self-healing hydrogel efficiently and steadily silenced STING expression in NP ***,the siSTING@HPgel significantly eased IVD inflammation and slowed IVD degeneration by prolonging STING knockdown in puncture-induced IVD degeneration rat model,revealing that STING pathway was a therapeutic target for IVD degeneration and such novel hydrogel had great potential for being applied to many other diseases for gene delivery.

关键词： STING IVD degeneration siRNA delivery Injectable hydrogel Dynamic Schiff base

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风力机翼型动态失速数值模拟

太阳能学报 2012年第10期33卷 1641-1647页

作者：满洪海杜刚陈江北京航空航天大学航空发动机数值仿真中心北京100191

在低雷诺数下,对NACA0012翼型和风力机专用翼型S809的动态失速进行数值模拟。研究不同网格密度、湍流模型对俯仰振荡翼型数值模拟的影响,并与实验结果进行对比验证。数值模拟得出的气动力迟滞曲线与实验结果变化趋势符合较好,表明了数... 详细信息

在低雷诺数下,对NACA0012翼型和风力机专用翼型S809的动态失速进行数值模拟。研究不同网格密度、湍流模型对俯仰振荡翼型数值模拟的影响,并与实验结果进行对比验证。数值模拟得出的气动力迟滞曲线与实验结果变化趋势符合较好,表明了数值方法的有效性。采用此方法研究了北航自主开发的风力机专用翼型的动态失速特性。通过分析表明该翼型在动态失速过程中升力系数下降平缓,俯仰力矩振荡变化不显著,适合应用于兆瓦级大型风力机叶片。

关键词：动态失速风力机翼型数值模拟

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基于自由曲面设计的全景鱼眼光学系统

应用光学 2022年第3期43卷 392-398页

作者：刘洪海广东弘景光电科技股份有限公司研发中心广东中山528437

全景鱼眼光学系统的成像圆通常为完整的圆形,小于感光芯片的垂直方向尺寸,相比长方形芯片,圆形成像圆面积较小,芯片有效像素利用率低。结合全景鱼眼光学系统成像圆小于芯片的特点,介绍一种基于自由曲面设计的全景鱼眼光学系统,可实现椭... 详细信息

全景鱼眼光学系统的成像圆通常为完整的圆形,小于感光芯片的垂直方向尺寸,相比长方形芯片,圆形成像圆面积较小,芯片有效像素利用率低。结合全景鱼眼光学系统成像圆小于芯片的特点,介绍一种基于自由曲面设计的全景鱼眼光学系统,可实现椭圆形成像区域,大大提高芯片有效像素的利用率。采用光学设计软件,构建自由曲面模型,运用玻璃镜片加塑料镜片混合构成的方法,通过消像差和控制不同温度场下焦点漂移设计非对称全景鱼眼光学系统的成像区域为椭圆,实现了镜头成像像高X方向接近芯片的水平尺寸,Y方向接近芯片的垂直尺寸。在不考虑制造公差的理想情况下,对于4:3芯片,根据圆和椭圆面积公式可得圆形成像区域的芯片像素有效利用率约为58.9%,椭圆形成像区域的芯片像素有效利用率约为78.5%。仿真和计算结果表明,采用椭圆形成像光学设计比圆形成像光学设计的芯片有效像素利用率提升15%左右。

关键词：全景鱼眼光学系统自由曲面椭圆形成像区域有效像素利用率