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Sagging damage characteristics of hull girder with trapezoidal cross-section subjected to near-field underwater explosion

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Defence Technology（防务技术） 2023年第3期21卷 1-13页

作者： Hai-tao Li Xin-ying Zheng Chi Zhang zhi-yuan mei Xue-fei Bai Kai Liu College of Naval Architecture and Ocean Engineering Naval University of EngineeringWuhan430033PR China

To investigate the overall damage characteristics and failure modes of a warship subjected to an underwater non-contact near-field explosion,a hull girder with a trapezoidal cross-section was designed,manufactured,and *** design criteria and parameters were determined according to the similarity *** responses of the girder freely floating on water were obtained under varying conditions,including stand-off distance,charge mass,and position of *** morphologies of the girder model were *** on our analysis,basic conditions for sagging damage of the hull girder are *** aim of this study was to determine an efficient method of attack resulting in the most severe damage to the ship *** experimental results show that the girder mainly exhibits a first-order response when the first wet frequency of the girder is close to the frequency of the explosion bubble *** largest deformation was observed when the underwater explosion occurred directly below the midspan of the girder compared to other explosions of the same intensity at different attack *** the ratio of stand-off to maximum bubble radius(λ)satisfies 0.7≤λ<2,the bubble mainly causes sagging damage instead of ***λdecreases(1≤λ<2),the sagging damage increases under the same charge ***,asλdecreases further(0.7≤λ<1),the sagging deformation *** is likely due to the impact of the liquid jet formed by the collapsing bubble,which causes the girder deformation to shift from sagging back to hogging *** initial shock wave excites the high-frequency response of the girder structure but contributes very little to the overall velocity and ***,bubble pulsation typically causes a low-frequency response,which will affect the velocity and displacement of the *** low-pressure region of the flow field formed by bubble pulsation and resonant coupling between the girder and the bubble are the predominant

关键词： underwater bubble girder

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Transformation of Cabbage(Brassica oleracea ***) with Bt cry1Ba3 Gene for Control of Diamondback Moth

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Agricultural Sciences in China 2011年第11期10卷 1693-1700页

作者： YI Deng-xia CUI Lei LIU Yu-mei ZHUANG Mu ZHANG Yang-yong FANG zhi-yuan YANG Li-mei Key Laboratory of Horticultural Crops Genetic Improvement Ministry of Agriculture~Institute of Vegetables and Flowers Chinese Academyof Agricultural Sciences Beijing 100081 P.R.China

To obtain transgenic cabbage line with broad insect resistance, a new synthetic Bacillus thuringiensis crylBa3 gene was introduced into white cabbage via Agrobacterium tumefaciens-mediated transformation and 37 transformants were obtained. Polymerase chain reaction （PCR） and Southern blot analyses confirmed that crylBa3 was successfully inserted into the genome of cabbage. Reverse transcription-polymerase chain reaction （RT-PCR） demonstrated that crylBa3 was expressed. Western blot results confirmed the production of insecticidal protein encoded by crylBa3. Insect bioassays showed that transgenic cabbages effectively controlled both susceptible and CrylAc-resistant diamondback moth （DBM） larvae.

关键词： Bacillus thuringiensis crylBa3 cabbage diamondback moth resistance

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Study on the Relationship Between the Ploidy Level of Microspore-Derived Plants and the Number of Chloroplast in Stomatal Guard Cells in Brassica oleracea

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Agricultural Sciences in China 2009年第8期8卷 939-946页

作者： yuan Su-xia,LIU Yu-mei,FANG zhi-yuan,YANG Li-mei,ZHUANG Mu,ZHANG Yang-yong and SUN Pei-tian Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China [a]Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences Beijing 100081 P. R. China

The relationship between the ploidy level of microspore-derived plants and chloroplast number in stomatal guard cells was studied in cabbage, broccoli, and Chinese kale. In the experiment, distribution statistics analysis and t-test were used to perform statistical analysis on chloroplast number of different ploidy level in those stomatal guard cells mentioned above, and morphology identifying and chromosome counting were used to test accuracy of counting chloroplast number in stomatal guard cells. The chloroplast average number in stomatal guard cells was very similar among the different leaf positions on the same plant and among significantly among the different ploidy the different locations in the same stoma in the same variety. All the leaf, while the chloroplast number varied distributions of the chloroplast number in different ploidy stoma were normal distribution fitted. A correlation has been established between ploidy and chloroplast number in the stomatal guard cells. In every single stoma of microspore-derived plants, the chloroplast number for a haploid should not be more than 10, diploids 11 to 15, and polyploids more than 15. The accuracy of this method for identification of different ploidy plants was 93.93%. Furthermore, the accuracy of this method was reliable and did not vary with the plants growth conditions. Therefore, the chromosome ploidy of plants derived from microspore culture in cabbage, broccoli, and Chinese kale can be identified by simply counting the chloroplast number in stomatal guard cells.

关键词： Brassica oleracea stomatal guard cells chloroplast number identification of ploidy

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S vacant CuIn_(5)S_(8) confined in a few-layer MoSe_(2) with interlayerexpanded hollow heterostructures boost photocatalytic CO_(2) reduction

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Rare Metals 2022年第1期41卷 144-154页

作者： Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng Cai Xiao-Xiao Zou Jing-Wen Jiang zhi-yuan mei Gen-Fu Zhao Xiao-Fei Yang Hong Guo School of Materials and Energy Yunnan UniversityKunming 650091China Nanomaterials and Energy Lab Department of Mechanical and Materials EngineeringWestern UniversityLondonON N6A 5B9Canada

The conversion of CO_(2)into CO,CH_(4)and other hydrocarbons through solar energy can alleviate the energy shortage *** design a novel photocatalyst with S defects CuIn_(5)S_(8)@MoSe_(2)hollow *** interlayerexpanded MoSe_(2)can increase the adsorption of *** unique hollow structure can improve the light utilization efficiency and the electron–holes ***_(5)S_(8)with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO_(2)***,S vacant CuIn_(5)S_(8)confined in a few-layers MoSe_(2)with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO_(2)*** 8-h light reaction,the outputs of CO and CH_(4)for the 15.3 wt%CuIn_(5)S_(8)@MoSe_(2)sample containing S vacancies(Vs)are 30.4 and 14.7 lmol·g^(-1),*** mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.

关键词： Sulfur vacancy CuIn_(5)S_(8) MoSe_(2)heterojunction Photocatalytic CO_(2)reduction

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Computed tomography enterography-based radiomics for assessing mucosal healing in patients with small bowel Crohn's disease

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World Journal of Gastroenterology 2025年第3期31卷 62-72页

作者： Hao Ding yuan-yuan Fang Wen-Jie Fan Chen-Yu Zhang Shao-Fei Wang Jing Hu Wei Han Qiao mei Department of Gastroenterology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Department of Radiation Oncology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Department of Gastroenterology Suzhou First People's HospitalSuzhou 234099Anhui ProvinceChina

BACKGROUND Mucosal healing(MH)is the major therapeutic target for Crohn's disease(CD).As the most commonly involved intestinal segment,small bowel(SB)assessment is crucial for CD ***,it poses a significant challenge due to its limited accessibility through conventional endoscopic *** To establish a noninvasive radiomic model based on computed tomography enterography(CTE)for MH assessment in SBCD *** Seventy-three patients diagnosed with SBCD were included and divided into a training cohort(n=55)and a test cohort(n=18).Radiomic features were obtained from CTE images to establish a radiomic *** demographics were analysed to establish a clinical model.A radiomic-clinical nomogram was constructed by combining significant clinical and radiomic *** diagnostic efficacy and clinical benefit were evaluated via receiver operating characteristic(ROC)curve analysis and decision curve analysis(DCA),*** Of the 73 patients enrolled,25 patients achieved *** radiomic-clinical nomogram had an area under the ROC curve of 0.961(95%confidence interval:0.886-1.000)in the training cohort and 0.958(0.877-1.000)in the test cohort and provided superior clinical benefit to either the clinical or radiomic models alone,as demonstrated by *** These results indicate that the CTE-based radiomic-clinical nomogram is a promising imaging biomarker for MH and serves as a potential noninvasive alternative to enteroscopy for MH assessment in SBCD patients.

关键词： Crohn’s disease Computed tomography enterography Mucosal healing Nomogram Radiomics

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基于三全育人的高职英语教学改革探究

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湖北开放职业学院学报 2021年第16期34卷 171-172,178页

作者：袁芝妹湖南外国语职业学院湖南长沙410000

随着素质教育理念的提出,高职教师教学工作发生了根本性变化。为响应习近平总书记在全国教育大会上所提出的新时代教育理念,相关部门颁布了以“三全育人”为核心的教育政策,加速我国高职院校教育体系的改革。高职英语教师要立足于社会... 详细信息

随着素质教育理念的提出,高职教师教学工作发生了根本性变化。为响应习近平总书记在全国教育大会上所提出的新时代教育理念,相关部门颁布了以“三全育人”为核心的教育政策,加速我国高职院校教育体系的改革。高职英语教师要立足于社会发展与人才需求的角度,充分发挥自身优势,将“三全育人”的本质渗透到课堂教学中,通过多种形式的教学情境与手段,加强人才培养力度的同时,促进其行为认知、综合能力的多元化的发展,为高职英语教学工作的高质量开展打下坚实基础。

关键词：三全育人高职英语教学改革融合措施

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浅谈战役卫勤支援保障系统野外驻训的使用管理

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医疗卫生装备 2009年第2期30卷 86-87页

作者：王军袁志美解放军第255医院河北唐山063000

目的:探讨战役卫勤支援保障系统野外驻训时的使用管理。方法:对战役卫勤支援保障系统在野外驻训时建立定人定位的管理模式、三级检查制度、装备使用维修保养和激励机制的管理方法。结果:它保证了战役卫勤支援保障系统装备良好的性能,防... 详细信息

目的:探讨战役卫勤支援保障系统野外驻训时的使用管理。方法:对战役卫勤支援保障系统在野外驻训时建立定人定位的管理模式、三级检查制度、装备使用维修保养和激励机制的管理方法。结果:它保证了战役卫勤支援保障系统装备良好的性能,防止了装备的遗失和损坏,保证了野战医疗所人员与该系统装备达到人机结合。结论:它可以使战役卫勤支援保障系统内装备得到及时的维修和保养。

关键词：战役卫勤支援保障系统野外驻训使用管理

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VRLA电池用木素性能比较

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电池 2016年第5期46卷 275-277页

作者：刘玉郭志刚梅园李桂发天能集团研究院浙江湖州313100

从结构、循环伏安、电池性能和高温化成等方面,对3种木素进行研究。挪威产木素A,循环性能较好,电池失水较少;国产木素C,低温性能较好,适用于高温环境或南方区域用的电池。

关键词：木素低温性能循环性能失水铅酸电池

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人工智能背景下高职外语类人才培养转型研究

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湖北开放职业学院学报 2023年第6期36卷 149-151页

作者：袁芝妹王丽湖南外国语职业学院湖南长沙410000

在人工智能、大数据、云技术的综合支持下,高等教育迎来了又一次教育改革契机。在高职外语类人才培养中,凭借传统教学模式和经验,教师开展语言输出和传授式教学活动,很难有效发展学生语言思维、语言素养,学生的外语对话和学习体验感不... 详细信息

在人工智能、大数据、云技术的综合支持下,高等教育迎来了又一次教育改革契机。在高职外语类人才培养中,凭借传统教学模式和经验,教师开展语言输出和传授式教学活动,很难有效发展学生语言思维、语言素养,学生的外语对话和学习体验感不强。通过引入基于人工智能支持的教育技术,学校可结合学生外语学习的个性化需求,打造智慧化教学模式。基于此,本文阐述人工智能+教育的概念,分析人工智能与外语人才培养结合的价值,基于高职外语类人才培养现状,探索人才培养转型路径。

关键词：人工智能高职院校外语类专业人才培养

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校企共建跨境电商校内校外双实训基地探索与实践

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湖北开放职业学院学报 2020年第20期33卷 34-35,38页

作者：袁芝妹梁婷婷湖南外国语职业学院湖南长沙410000

世界经济一体化进程的加快与互联网技术的迅猛发展,推动着跨境电商行业的崛起,但由于行业发展仍处于初级阶段,高校关于该学科的教学仍不够健全。本文简要概述了校企共建跨境电商双实训基地的重要意义,分析了跨境电商校内校外双实训基地... 详细信息

世界经济一体化进程的加快与互联网技术的迅猛发展,推动着跨境电商行业的崛起,但由于行业发展仍处于初级阶段,高校关于该学科的教学仍不够健全。本文简要概述了校企共建跨境电商双实训基地的重要意义,分析了跨境电商校内校外双实训基地建设的思路,并提出了基地建设实践的具体措施,仅供参考。

关键词：校企共建跨境电商双实训基地产教融合双师教育

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