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统一数字证书签名服务系统设计与实现

科学技术创新 2025年第1期 96-99页

作者：樊婧竹上海浦东发展银行股份有限公司上海

随着我行零售业务数字化战略的深化开展,网银、手机APP等互联网渠道覆盖越来越广、已经成为客户交易的主要渠道。在业务快速发展的同时,我行在处理客户有关我行电子渠道纠纷时的证据证明力不足的问题也有所凸显。基于此,建立了统一数字... 详细信息

随着我行零售业务数字化战略的深化开展,网银、手机APP等互联网渠道覆盖越来越广、已经成为客户交易的主要渠道。在业务快速发展的同时,我行在处理客户有关我行电子渠道纠纷时的证据证明力不足的问题也有所凸显。基于此,建立了统一数字证书签名服务提供电子签名、数字证书、第三方存证等服务,在为客户提供更优质金融服务的同时,增加客户行为记录,固化相关交易证据,通过技术手段强化证据证明效力,有效保障各方权益。

关键词：电子签名数字证书客户行为

新课标背景下的初中英语大单元主题教学技巧探析

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英语教师 2025年第1期 166-169页

作者：范云丽江苏省苏州市常熟市海虞初级中学江苏苏州215519

基于《义务教育英语课程标准(2022年版)》提出的“发挥核心素养的统领作用”的课程理念,提出大单元主题教学有助于落实培养学生核心素养的目标。结合具体案例,从主题与教学内容的设计、教学前任务的设计、教学中的指导和教学后的活动组... 详细信息

基于《义务教育英语课程标准(2022年版)》提出的“发挥核心素养的统领作用”的课程理念,提出大单元主题教学有助于落实培养学生核心素养的目标。结合具体案例,从主题与教学内容的设计、教学前任务的设计、教学中的指导和教学后的活动组织等角度系统探索初中英语大单元主题教学技巧,在提升大单元主题教学有效性的同时,培养学生的核心素养,促进学生全面发展。

关键词：初中英语大单元主题教学核心素养

Effects of water level variations on the water quality of Huayang Lakes, China

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Journal of Geographical Sciences 2025年第1期 173-188页

作者： AN Lesheng LIU Chun fan Zhongya LIAO Kaihua WANG Wencai WANG Nan School of Resources and Environment Anqing Normal University South China Institute of Environmental Sciences Ministry of Ecology and Environment The Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyCAS

To explore water level variations and their dynamic influence on the water quality of Huayang Lakes, the water level from 1967 to 2023 and water quality from 2015 to 2023 were analyzed using the Mann–Kendall trend test, box plots, and violin plots. The results show a notable hydrological rhythm of water level alternation between dry and flood seasons in Huayang Lakes, with an average water level of 12.82 m and a monthly range of 11.21–17.24m. Since 2017, the water level of Huayang Rivers has shown a decreasing trend of –0.02 m/*** phosphorus(TP) has become the primary pollutant. The TP concentrations in Longgan Lake(the largest lake) during the dry, rising, flood, and retreating seasons from 2015 to 2023were 0.083, 0.061, 0.050, and 0.059 mg/L, respectively. The effect of water level on TP was mainly observed during the low-water period. When the water level in the dry season rose to 12.25 and 13.00 m, the percentage of TP exceeding 0.1 mg/L in Longgan Lake decreased to 55.8% and 33.3%, respectively. During the dry season, wind and wave disturbances caused the release of endogenous phosphorus in Huayang Lakes. This led to drastic fluctuations in TP concentration, reducing the correlation between water level and TP. When external control is limited, the water level during the dry season should be maintained between 12.25 and 13.0 m. Additionally, it is necessary to accelerate the restoration of submerged macrophyte species(such as Hydrilla verticillata and Vallisneria natans) in the Huayang Rivers.

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Electromagnetic three-dimensional vibration energy harvester based on an oblique cross-spring vibrator structure

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Science China Technological Sciences 2025年第1期 189-206页

作者： Yaohui AN Yimin fan Kefan XU Yuhao CHEN Yewei ZHANG Liqun CHEN School of Science Harbin Institute of Technology College of Aerospace Engineering Shenyang Aerospace University

This paper presents an electromagnetic three-dimensional vibration energy harvesting device that uses an oblique cross-spring vibrator structure to collect low-frequency vibration energy. The oblique cross-spring structure allowed the center vibrator to vibrate in any direction. Together with six-directional coils, this configuration senses and harvests environmental vibrations across all directions and levels. First, the dynamics of the oblique cross-spring vibrator structure were analyzed and a finite element simulation was performed for the magnet arrangement and mode shape of the structure. A prototype is designed,fabricated, and experimentally verified. The results showed that the efficiency of the three-dimensional energy output was higher under the same excitation, which was 2.7 times higher than that of the unidirectional output. The unidirectional output power with load is 0.94 mW at 11 Hz under 0.3 g base excitation. The highest total output power of the prototype was 50 mW when it was fixed to the leg at a running speed of 8 km/h. Consequently, the energy harvesting scheme proposed in this study has a considerable low-frequency output effect, which provides a novel means of improving the electrical performance of energy harvesting systems for self-powered IoT and sensor devices.

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Three-dimensional analysis of relationship between relative orientation and motion modes

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Chinese Journal of Aeronautics 2014年第6期27卷 1495-1504页

作者： fan Shijie fan Hongqi Xiao Huaitie fan Jianpeng Fu Qiang ATR Key Laboratory National University of Defense Technology College of Electronic Science and Engineering National University of Defense Technology

Target motion modes have a close relationship with the relative orientation of missile-totarget in three-dimensional highly maneuvering target interception. From the perspective of relationship between the sensor coordinate system and the target body coordinate system, a basic model of sensor is stated and the definition of relative angular velocity between the two coordinate systems is introduced firstly. Then, the three-dimensional analytic expressions of relative angular velocity for different motion modes are derived and simplified by analyzing the influences of target centroid motion, rotation around centroid and relative motion. Finally, the relationships of the relative angular velocity directions and values with motion modes are discussed. Simulation results validate the rationality of the theoretical analysis. It is demonstrated that there are significant differences of the relative orientation in different motion modes which include luxuriant information about motion modes. The conclusions are significant for the research of motion mode identification,maneuver detection, maneuvering target tracking and interception using target signatures.

关键词： Attitude analysis Coordinate system Motion mode Relative angular velocity Sensor Terminal guidance

Research on the architecture of submarine-fan lobes in the Niger Delta Basin,offshore West Africa

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Journal of Palaeogeography 2016年第3期5卷 185-204页

作者： Jia-Jia Zhang Sheng-He Wu Ting-En fan Hong-Jun fan Li Jiang Cheng Chen Qiong-Yuan Wu Peng Lin State Key Laboratory of Petroleum Resources and Prospecting College of GeosciencesChina University of Petroleum(Beijing) Research Institute China National Offshore Oil Corporation

As one of the most important reservoirs in submarine fan, submarine lobes are hot fields for the deep-water oil-gas exploration in the world. Although a large amount of researches have been carried out on the architecture model of submarine lobes throughout the world, some controversies still exist on aspects such as the differential distribution of composite patterns and the quantitative relationships among different sedimentary settings. This paper, which took an oilfietd in the Niger Delta Basin offshore West Afnca as an example and utilized abundant core, welt-logging and seismic data comprehensively, established the semi- quantitative to quantitative architecture model for individual lobe and lobe complex. Results show that （1） A lobe complex was composed of multiple individual lobes as the compensational stacking pattern. According to the stacked relationship among individual lobes, four types of compensational stacking pattern were classified as the inordered type, the lateral migration type, the retrograding type and the prograding type. Influenced by the laterally confined degree of palaeotopography, the basin floor fan lobe complex was easily superimposed as inordered type, showing relatively large lateral width but relatively small thickness; the slope fan lobe complex was easily superimposed as lateral migration, retrograding and pro- grading types, showing relatively small lateral width but relatively large thickness. （2） Influenced by the laterally confined degree of palaeotopography, the basin floor fan individual lobes showed relatively large planar distribution area but relatively small thickness, while the slope fan individual lobes showed relatively small planar distribution area but relatively large thickness. An individual lobe was composed of multiple lobe stories by the way of aggradation-progradation pattern. From proximal to middle and distal part of individual lobes, the bottom mass-transport-deposits and the top branch channels disappeare

关键词： Submarine lobes Composite pattern Quantitative scale Niger Delta Basin West Africa

Brazing temperature-dependent interfacial reaction layer features between CBN and Cu-Sn-Ti active filler metal

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Journal of Materials Science & Technology 2019年第10期35卷 2163-2168页

作者： Yonggang fan Junxiang fan Cong Wang School of Metallurgy Northeastern UniversityShenyang110819China Shenyang NEU New Industrial Technology Research Institute Co.LTD Northeastern UniversityShenyang110819China

CBN/Cu-Sn-Ti(CBN: cubic boron nitride) composites are prepared by active brazing sintering at 1123 K,1173 K, 1223 K and 1273 K, respectively. The effects of brazing temperature on the wettability, interfacial characteristics, and elemental distribution variations are fully investigated. When the brazing temperature is below 1223 K, completely uncoated and/or partially coated CBN particles with sharp edges can still be observed, and the reaction layer, mainly composed of Ti N and Ti B2, appears to be thin and *** the brazing temperature is 1223 K, all CBN particles are completely coated, suggesting that adequate wetting has taken place. Besides, as Ti diffuses thoroughly and enriches the interface, the reaction layer, filled primarily by Ti N, Ti B2 and Ti B, becomes thicker(about 1.30 μm), more uniform, stable and continuous. Further increasing the temperature to 1273 K is unnecessary or even harmful as the reaction layer thickness undergoes negligible change yet some tiny micro-cracks appear on the interface, which may likely deteriorate the grinding capability of the final brazing products.

关键词： Brazing temperature CBN/Cu-Sn-Ti filler metal Wettability Reaction layer

Efficient implementation of quantum arithmetic operation circuits

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Science China(Physics,Mechanics & Astronomy) 2021年第1期64卷 116-117页

作者： Heng fan Institute of Physics Chinese Academy of SciencesBeijing100190China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing100190China Songshan Lake Material Laboratory Dongguan523000China

Realization of robust quantum computing is a tremendous *** one hand,one must reduce errors as many as possible using various means[1-3];on the other hand,one may make large error rates tolerable via fault-tolerant *** achieving tolerant against noises,the cost to pay is the increased number of gates ***,an efficient implementation of fault-tolerant gates is *** already evidenced,Clifford gates with a T gate can form a universal set of fault-tolerant gates.

关键词： quantum arithmetic Efficient

Evaluating the material strength from fracture angle under uniaxial loading

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Frontiers of Structural and Civil Engineering 2019年第2期13卷 288-293页

作者： Jitang fan State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute for Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

The most common experimental methods of measuring material strength are the uniaxial compressive and tensile tests. Generally, shearing fracture model occurs in both the tests. Compressive strength is higher than tensile strength for a material. Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxial tension. In this work, a unified relation of material strength under uniaxial compression and tension is developed by correlating the shearing fracture angle in theory. This constitutive relation is quantitatively illustrated by a function for analyzing the material strength from shear fracture angle. A computational simulation is conducted to validate this theoretical function. It is full of interest to give a scientific illustration for designing the high-strength materials and engineering structures.

关键词： strength fracture mechanics