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针对传统阶梯型高阶螺旋相位板在光纤端面上制作难度大和使用过程中容易损坏的问题，文章提出了一种在光纤端面上制作平面型螺旋相位板的设计方案。这种相位板在不同方位角上高度相同，通过控制不同方位角处的折射率可获得不同的拓扑荷数。文章使用菲涅尔衍射理论对该方案产生的涡旋电场分布及光强分布进行了详细的理论分析，同时采用时域有限差分方法对基模高斯光束通过具有不同拓扑荷数的平面型螺旋相位板后在光纤中的传播过程进行了仿真验证。仿真结果表明，该种光纤端面平面型相位板对于高阶和低阶模式都能产生高质量的涡旋光束，有效克服了传统阶梯型螺旋相位板存在的不足。

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background In relation to neurodevelopmental hypothesis in the etiology of schizophrenia, brain-derived neurotrophic factor (BDNF) as a neurotrophin occupies a relatively dominant position in neuronal development and is a potential biomarker for schizophrenia, and previous studies have suggested that its serum concentration and genetic polymorphisms play a vital role in the pathogenesis of schizophrenia, but this remains controversial. Objective To analyze the difference in BDNF serum concentration between schizophrenic patients and healthy controls, and to explore the correlation of three BDNF single nucleotide polymorphism(SNPs) including rs11030101, rs2030324 and rs6265 with BDNF serum concentration and clinical symptoms in patients with schizophrenia, thus providing references for the clinical treatment of schizophrenia. Methods A case-control study was conducted on 55 patients with schizophrenia who attended the Zhongshan Third People's Hospital from January 2019 to December 2020 and met the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5), and 31 healthy controls concurrently recruited from the hospital or general population. Positive and Negative Symptom Scale (PANSS) was utilized to evaluate the psychiatric symptoms of patients with schizophrenia. BDNF serum concentration in all participants was measured using enzymelinked immunosorbent assay (ELISA), and the genotype distributions of three BDNF SNPs (rs11030101, rs2030324, rs6265) were investigated by polymerase chain reaction sequence-based typing method. Results BDNF serum concentration in patient group was lower than that in control group, with statistical difference(t=-3. 804, P<0. 01). In terms of clinical symptoms, PANSS total score, excitement/hostility domain score, and depression/anxiety domain score demonstrated statistical difference among patients with different genotypes at SNP rs11030101(t=2. 022, Z=-2. 696, -2. 467, P<0. 05 or 0. 01). No statistical difference was noted in BDNF serum concentration in patients with different genotypes at three BDNF SNPs(Z=1. 483, F=2. 584, 0. 417, P>0. 05). Conclusion Patients with schizophrenia are found to have low BDNF serum concentration, and the three BDNF SNPs (rs11030101, rs2030324, rs6265) are not associated with BDNF serum concentration, whereas the BDNF rs11030101 polymorphism may contribute to the manifestation of clinical symptoms of excitement/hostility and depression/anxiety in patients with schizophrenia. Furthermore, BDNF serum concentration seems to be more dependent on clinical diagnosis effect rather than genetic polymorphism.[Funded by Guangdong Province Medical Science and Technology Research Fund Project (number, A2021205); Zhongshan Medical Research Program(number, 2022J221)]. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Fuzhou University is the property of Journal of Fuzhou University, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Aeronautical Materials is the property of Editorial Board of Journal of Aeronautical Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The finite element analysis is used to predict the bending capacity and failure mechanism of composite hat-stiffened panel with pre-filled blocks, and the experiment verification is completed. Firstly, based on the finite element software ABAQUS, a solid finite element analysis model of hat-stiffened panel with pre-filled blocks is established, and cohesive zone model is used to simulate the interface between the rib and skin. At the same time, based on the Hashin and Tsai-Wu criteria, the user-defined material subroutine (UMAT) is written. The results show that load capacity, damage mechanism and failure location of the finite element simulation are consistent with the results of the experiment, and the load-displacement curve is roughly the same. When the ultimate load is reached, the rib fails at the junction of the chopped fiber block and the foam in the form of “compression”, resulting in a decrease in the structural load-bearing capacity. There is no debonding phenomenon between the ribs and the skin in the experiment and simulation. Moreover, increasing the number of rib layers and the length of chopped fiber blocks can effectively improve the structural load-bearing capacity. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Fuzhou University is the property of Journal of Fuzhou University, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The sliding step technique of woman shot-putter Liu Xiangrong was studied. It was found that the sliding time should be shortened to 0.4 s and the sliding distance extended to 0.8 m. The height difference between the shot put and the body weight center should reduce to 0.2 m and the included angle between upper legs increase to more than 110° so as to maintain a smooth sliding. While the body lifted, the angle between the right leg and the ground should be controlled within 60° and the body inclination angle within 40° , thus the body weight vertical speed was reduced and the horizontal speed increased. When the highest speed of the shot put was the same as the speed of the body weight center, the horizontal speed of the later sliding step could maintain consistent. [ABSTRACT FROM AUTHOR]

The sliding stage technique of five women shot putters of China was studied. It was found that the head height and shoulder height should be averagely 0.8 m and 0.7 m, respectively. The body weight center should also be lowered. A 20 °trunk anteversion angle is proper. The hip should shift rearward the throwing orientation. By these, a tucked body like a pressed spring is shaped so as to prepare the low, smooth and fast sliding step. [ABSTRACT FROM AUTHOR]

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)