Subjects: Other Disciplines >> Synthetic discipline submitted time 2024-03-05 Cooperative journals: 《第八届海峡两岸暨港澳地区高校现代书院制教育论坛 》
Abstract：大学新生从高中到大学的转变过程中，不仅需要完成自身的角色转变，更重要的是从外因驱动到内因驱动的学习动力转变。通过对北京航空航天大学大类培养模式下本科新生进行调研，发现学生在对大学学习的适应性、计划制定习惯和学习规划、大学目标的清晰度、自我效能感及学习成就感上还存在一些不足。建议高校开展学业和职业生涯教育，帮助学生明确学习目标;开展一对一学业咨询和心理咨询，纾解学生压力;加强新生导师、班主任建设，弘扬优良学风;发挥朋辈带头作用，树立先进榜样。采取多种手段激发学生学习动力、提高学生自我效能，助力新生做学习生活的主导者。
Subjects: Other Disciplines >> Synthetic discipline submitted time 2024-03-05 Cooperative journals: 《第八届海峡两岸暨港澳地区高校现代书院制教育论坛 》
Abstract：创新性的将“三全育人”理念融入书院辅导员谈心谈话工作中，构建了全流程、全方位、全员的谈心谈话工作机制。通过全流程的谈心谈话解决目前谈心谈话工作缺乏体系设计的问题，从而实现学生工作的精准思政;通过全方位的谈心谈话解决内容单一的问题，从而精准排险;通过全员的谈心谈话解决数据分析不足的问题，从而实现精准关爱。研究贡献有助于提升书院辅导员谈心谈话工作的可操作性与科学性。
Subjects: Physics >> Nuclear Physics submitted time 2023-12-24
HE Ziyang
WU Xiaoguang
JIANG Wei
LI Congbo
ZHOU Zhenxiang
SUN Qi
GUO Mingwei
WU Hongyi
LI Zhihuan
FAN Ruirui
TANG Jingyu
LI Tianxiao
HU Shouyang
ZHI Yu
SONG Jinxing
LI Peiyu
LUAN Guangyuan
ZHANG Qiwei
WANG Zhaohui
CHEN Xiongjun
Abstract： Isomer with long lifetime and high excitation energy has great significant in the fields of national strategic security and energy storage. Mastering the method of inducing isomer to decay is the key technology. However, this technology has got into trouble in recent years. For mastering the method of inducing isomer to decay, it is beneficial to start the research on the formation, excitation and de-excitation mechanism of isomer from the view of atomic nucleus structure. In terms of experimental technology, we use the white light neutron beams to bombard Hf target. We established a triple coincidence measurement system, whcih consisted of GTAF-II and HPGE, combined with white light neutron time of flight. Through the analysis of experimental data, we found the sign of the $^{178}$Hf isomeric state exciting to the transition level and releasing rapidly.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2022-04-07 Cooperative journals: 《计算机应用研究》
Abstract： For the accuracy and real-time performance of multiple input multiple output (MIMO) nonlinear time-delay system, we propose the identification scheme based on multi-dimensional Taylor Network (MTN) . We use MTN as an identification model. MTN identification model’s learning algorithm adopts the WE-CG algorithm, which combines the weight-elimination (WE) algorithm with the conjugate gradient (CG) algorithm. WE algorithm can simplify the structure of MTN model so as to reduce computational complexity and improve the real-time performance. Finally, there are two experimental examples containing a numerical example and a project one to verify the effectiveness of the proposed identification scheme. And we use the traditional MTN identification scheme to compare. Both the accuracy and the computational complexity analysis illustrate the accuracy and the real-time performance of the proposed scheme. Results from our experiments and comparison show that the proposed scheme can identify the MIMO nonlinear time-delay system accurately, and the proposed identification scheme has a simpler structure and lower computational complexity than the traditional MTN identification scheme.
Subjects: Computer Science >> Other Disciplines of Computer Science submitted time 2021-10-07
Abstract： Blockchain is a new decentralized infrastructure and distributed computing paradigm rising with the increasing popularity of digital cryptocurrencies such as bitcoin. At present, it has attracted great attention and extensive attention from government departments, financial institutions, science and technology enterprises and capital markets. While the digital currency represented by bitcoin has achieved great success, it also has many defects and brings a series of social problems. This paper proposes a new issuance mode of digital currency and asymmetric token (NFT), which can effectively make up for the defects of current digital currency and create greater social value. " "
Peer Review Status:
Awaiting Review
Subjects: Management Science >> Management Engineering submitted time 2021-07-16
Abstract： "
Peer Review Status:Awaiting Review
Subjects: Psychology >> Other Disciplines of Psychology submitted time 2021-02-25
Abstract： Previous brain imaging studies have shown that the specialized experience achieved by expert sports players after years of training contributes to plasticity in both brain function and structure. However, changes in brain plasticity related to participating in various types of sports, specifically sports that involve higher-level strategies and cognitive function, remain unclear. Table tennis is a sport requiring high levels of strategy. Thus, the present study investigated the white matter structure of the brain in expert table tennis players who had undergone long-term training. Given the accumulating evidence that action processing in the brain occurs along two distinct pathways—dorsal and ventral—we hypothesized that, in addition to changes in the white matter of the dorsal sensorimotor system, the white matter in the ventral pathway linking brain regions related to higher-level cognitive function would differ between expert table tennis players and nonplayers. An investigational group of 31 expert table tennis players (20.06 ± 1.69 years of age) and a control group of 28 college students (20.68 ± 1.66 years of age) who had no professional training in table tennis were recruited for the study. The table tennis players were members of university teams, and each player had more than 7 years of table tennis training. Diffusion tensor imaging techniques were used to compare white matter microstructure properties of the brain between expert players and nonplayers. Statistical analyses were performed using independent t-tests. Further analysis was conducted for the expert player group to assess whether any correlation existed between fractional anisotropy (FA) values and training time. Consistent with our hypothesis, the white matter microstructure properties of both the dorsal and ventral pathways in expert table tennis players significantly differed from those in nonplayers. Specifically, FA values in the bilateral corticospinal tracts, which mainly connect brain regions in the dorsal sensorimotor system, were higher in experts than in nonplayers. Compared with nonplayers, expert players also had higher FA values in the left inferior longitudinal fasciculus and bilateral inferior occipitofrontal fasciculus of the ventral pathway, which are involved in higher-level cognitive processing, such as semantic processing or thinking. By contrast, no white matter region showed a higher FA value in nonplayers than in expert players, and no region was found with axial diffusivity difference between the groups. Additionally, radial diffusivity was lower in the left superior longitudinal fasciculus and bilateral inferior occipitofrontal fasciculus in experts than in nonplayers. Correlation analysis of the expert group showed significant positive correlations between training time and FA values in both the left superior longitudinal fasciculus in the ventral pathway and bilateral corticospinal tracts in the dorsal pathway. Taken together, these findings suggest that enhanced structural integrity of the white matter in both the dorsal and ventral pathways is associated with long-term, expert table tennis training. The observed structural plasticity is conducive to promoting cognitive processing of concrete sensorimotor and abstract information, which would enable expert players to excel at sports requiring a high level of strategy. "
Peer Review Status:Awaiting Review
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-04 Cooperative journals: 《金属学报》
Abstract：利用透射电子显微镜研究了一种低合金钢中马氏体的微结构. 研究发现, 淬火态的马氏体由铁素体基体和弥散于基体中的高密度纳米小颗粒组成, 这种小颗粒的晶体结构可标定为六角结构的?相. ?相与铁素体基体(α-Fe)的取向关系为:[113]α//[2113]ω，(110)α//(1101)ω 和(211)α//(0110)ω, 点阵常数aω =1.414aα, cω =0.866aα. 马氏体中的碳原子呈非均匀分布, 铁素体基体具有很低的碳含量, 合金中的碳原子主要富集在ω相中.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-04 Cooperative journals: 《金属学报》
Abstract：通过对胶体晶体模板的反向复制, 制备了反点阵列孔径各异的Au/TiO2复合薄膜. 采用SEM, AFM, XRD, UV-Vis和四探针测试仪等手段对复合薄膜的结构和光催化性能进行了表征. 通过对胶体晶体模板和反点阵列几何模型的计算, 讨论了Au反点阵列在TiO2薄膜表面的覆盖面积与模板中微球粒径的关系. 结果表明: 反点阵列孔径对复合薄膜的光催化性能有显著影响. 孔径增大，使反点阵列的导电性能得以提高, 载流子的输运效率得到增强, 促使了光催化性能的提高; 同时, 孔径增大又造成光生电子向反点阵列迁徙过程中的复合几率加大, 反而使光催化性能降低. 两种作用共同导致了Au/TiO2复合薄膜的光催化性能随Au反点阵列孔径的增大出现先提高后降低的变化规律, 并在孔径为3.3 μm时达到最高.
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