期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到9,139篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Pull-out重建法与Fast-fix缝合法治疗内侧半月板后根损伤的疗效对比 认领 引用
1
作者 沈哲源 彭巧英 +2 位作者 张占丰 郭松华 吴荣 《中国骨伤》 CAS CSCD 2026年第1期43-51,共9页
目的:探讨Pull out重建法与Fast fix全内缝合法对内侧半月板后根损伤患者中期的膝关节功能、骨关节炎进展及半月板外移的作用。方法:2019年6月至2022年1月共纳入接受手术治疗的75例内侧半月板后根损伤患者,根据治疗方式的不同,分为Pull ... 目的:探讨Pull out重建法与Fast fix全内缝合法对内侧半月板后根损伤患者中期的膝关节功能、骨关节炎进展及半月板外移的作用。方法:2019年6月至2022年1月共纳入接受手术治疗的75例内侧半月板后根损伤患者,根据治疗方式的不同,分为Pull out重建组以及Fast fix缝合组。Pull out重建组44例,男9例,女35例;年龄(51.23±4.89)岁;左侧17例,右侧27例。Fast fix缝合组31例,男7例,女24例;年龄(52.13±5.47)岁;左侧11例,右侧20例。采用Lysholm功能问卷和国际膝关节文献委员会膝关节评估表(International Knee Documentation Committee,IKDC)评分对患者膝关节功能进行评分。通过膝关节X线及MRI检查,评估关节炎进展情况和半月板愈合情况。结果:两组患者均获得随访,Pull out固定组(52.05±8.27)个月,Fast fix缝合组(52.00±7.13)个月。Pull out组手术时间(50.94±5.66)min长于Fast fix组的(31.34±3.99)min,差异有统计学意义(P=0.000)。Pull out组完全愈合34例,部分愈合9例,未愈合1例;Fast fix组完全愈合21例,部分愈合8例,未愈合2例;差异无统计学意义(P>0.05)。两组术前及末次随访K L分级以及MRI检查的软骨损伤分级比较,差异均无统计学意义(P>0.05);两组末次随访与术前比较,差异均无统计学意义(P>0.05)。两组末次随访,Lysholm评分及IKDC评分总分比较,差异无统计学意义(P>0.05)。Pull out组术前半月板外移22例,末次随访半月板外移30例,差异有统计学意义(P=0.010);Fast fix组术前半月板外移17例,末次随访半月板外移23例,差异有统计学意义(P=0.000)。Pull out组半月板外移术前3.05(2.50,4.08)mm,末次随访3.35(2.73,4.00)mm,差异无统计学意义(P=0.183);Fast fix组半月板外移术前3.50(2.30,4.30)mm,末次随访3.60(2.90,4.60)mm,差异有统计学意义(P=0.000)。两组末次随访时半月板外移发生率和外移程度比较,差异均无统计学意义(P>0.05)。结论:Pull out修复法与Fast fix缝合法治疗内侧半月板后根损伤的患者时均能够改善膝关节功能。两种治疗方式术后均可获得满意的愈合率,并且均不会导致膝骨关节炎的快速进展。 展开更多
关键词 半月板后根损伤 半月板修复 Pull out重建法 全内缝合法
暂未订购 下载PDF
A dual-band filtering push‒pull power amplifier with a large frequency ratio employing a hybrid-mode bandpass response balun 认领 引用
2
作者 Jiyang CHU Xiang WANG +5 位作者 Tianxiang CHEN Jindong ZHANG Jun HU Huangyan LI Boyu SIMA Wen WU 《ENGINEERING Information Technology & Electronic Engineering》 SCIE EI CSCD 2026年第2期95-103,共9页
A dual-band filtering push‒pull power amplifier(PA)with a large frequency ratio is presented in this paper.The proposed filtering power dividing/combining network is based on a hybrid-mode filtering balun using micros... A dual-band filtering push‒pull power amplifier(PA)with a large frequency ratio is presented in this paper.The proposed filtering power dividing/combining network is based on a hybrid-mode filtering balun using microstrip line(MSL)and substrate integrated waveguide(SIW).The MSL filtering balun operates in the S-band,with a frequency range of 2.6‒2.86 GHz.Meanwhile,the SIW filtering balun is designed for Ku-band operation,covering a frequency range of 13‒13.65 GHz.Under these conditions,the prototype is capable of attaining a frequency ratio as high as five times the original value.Due to the inherent differential characteristic of the hybrid-mode filtering balun with a large frequency ratio,the proposed push‒pull PA not only realizes filtering functionality but also achieves second-harmonic suppression.To validate the designed concept,the proposed prototype has been designed,fabricated,and measured.Measurement results demonstrate that the proposed PA achieves a 7 dB small-signal gain while maintaining out-of-band spurious rejection during active testing.The developed dual-band filtering push‒pull PA delivers excellent performance,with a peak output power of 36.8 dBm at low frequencies and 36 dBm at high frequencies.Moreover,by employing dual-band filtering baluns,the PA inherently suppresses even-order harmonics while simultaneously providing filtering characteristics in both operational bands,which effectively suppresses near-band spurious signals. 展开更多
关键词 Large frequency ratio Dual-band filtering balun Harmonic suppression Push‒pull power amplifier
暂未订购 下载PDF
RNA pull-down联合质谱分析lncRNA HSFAS在增生性瘢痕中的作用及机制 认领 引用 被引量：1
3
作者 夏童童 马芳 +8 位作者 孙浩原 刘虹麟 张正皓 杨佳琪 张慧萍 吴凯 沈江涌 姜怡邓 李桂忠 《中国组织工程研究》 CAS 北大核心 2025年第12期2492-2499,共8页
背景:课题组前期研究发现,增生性瘢痕特异性长链非编码RNA HSFAS是一种可用于增生性瘢痕诊断的新型生物标志物,但其如何在增生性瘢痕中发挥作用尚不清楚。目的:探讨长链非编码RNA HSFAS在增生性瘢痕中的作用及机制。方法:临床收集3例行... 背景:课题组前期研究发现,增生性瘢痕特异性长链非编码RNA HSFAS是一种可用于增生性瘢痕诊断的新型生物标志物,但其如何在增生性瘢痕中发挥作用尚不清楚。目的:探讨长链非编码RNA HSFAS在增生性瘢痕中的作用及机制。方法:临床收集3例行增生性瘢痕组织切除手术患者的新鲜增生性瘢痕皮肤组织和增生性瘢痕旁正常皮肤组织标本,应用免疫荧光技术检测两种皮肤组织冰冻切片中长链非编码RNA HSFAS的表达。应用酶消化法体外分离增生性瘢痕皮肤组织与正常皮肤组织原代成纤维细胞,采用qRT-PCR检测细胞中长链非编码RNA HSFAS mRNA表达,通过RNA pull-down联合质谱技术检测与长链非编码RNA HSFAS相互结合的蛋白,利用GO和KEGG分析长链非编码RNA HSFAS参与增生性瘢痕进展的主要功能和通路,通过catRAPID和RPISeq网站分析确定长链非编码RNA HSFAS与蛋白的靶向结合。结果与结论:①与正常皮肤组织相比,增生性瘢痕组织中的长链非编码RNA HSFAS表达升高(P<0.05);与正常皮肤组织来源成纤维细胞相比,增生性瘢痕组织来源成纤维细胞中长链非编码RNA HSFAS mRNA表达升高(P<0.05);②RNA pull-down联合质谱技术明确与长链非编码RNA HSFAS相互结合的蛋白有510个;GO和KEGG分析结果显示:这些蛋白主要涉及RNA剪接和加工、染色体合成和分离、细胞周期等过程,其中涉及RNA剪接和加工的蛋白有支架附着因子B2和DICER1,并且与长链非编码RNA HSFAS的结合分数较高;生物信息学技术分析验证结果显示,长链非编码RNA HSFAS与支架附着因子B2和DICER1蛋白存在相互结合;③结果显示,长链非编码RNA HSFAS可能通过与支架附着因子B2和DICER1蛋白相互结合调控RNA剪接和加工修饰影响基因表达,从而促进增生性瘢痕的发生发展。 展开更多
关键词 增生性瘢痕 lncRNA HSFAS 成纤维细胞 RNA pull-down 质谱分析
暂未订购 下载PDF
腹膜透析拔管中pull技术与常规技术疗效比较 认领 引用
4
作者 周美央 周参新 潘翠萍 《中国现代医生》 2025年第21期14-17,共4页
目的比较pull技术拔管和常规开放手术拔管在腹膜透析(peritonealdialysis,PD)导管拔除中的临床疗效。方法回顾性分析2017年1月至2024年8月宁波大学附属人民医院收治的拟行PD导管拔除的81例PD患者,根据拔管方式分为常规拔管组(n=43)和pul... 目的比较pull技术拔管和常规开放手术拔管在腹膜透析(peritonealdialysis,PD)导管拔除中的临床疗效。方法回顾性分析2017年1月至2024年8月宁波大学附属人民医院收治的拟行PD导管拔除的81例PD患者,根据拔管方式分为常规拔管组(n=43)和pull技术拔管组(n=38)。常规拔管组采用开放式手术拔管,pull技术拔管组采用pull技术拔管;对比分析两组患者的围术期指标及术后并发症。结果Pull技术拔管组患者的手术时间、术中出血量及住院时间均显著优于常规拔管组(P0.05)。结论Pull技术作为微创拔管方法,具有创伤小、恢复快、医疗成本低等优势,可作为PD导管拔除的首选术式。 展开更多
关键词 腹膜透析 pull技术拔管 术后疼痛 并发症 感染
暂未订购 下载PDF
基于logistic回归模型的Pull Request合并结果预测 认领 引用
5
作者 陈萍 周礼亮 张卫丰 《软件导刊》 2025年第4期89-92,共4页
Pull Request是GitHub中代码贡献的一种重要方法,当开发人员希望将其代码更改从本地机器合并到存储项目中所有源代码的主存储库时,需要提交Pull Request。基于logistic回归模型对Pull Request被拒绝情况进行预测实验,预测实验中考虑的... Pull Request是GitHub中代码贡献的一种重要方法,当开发人员希望将其代码更改从本地机器合并到存储项目中所有源代码的主存储库时,需要提交Pull Request。基于logistic回归模型对Pull Request被拒绝情况进行预测实验,预测实验中考虑的输入特征为通过数据挖掘关联规则找出的影响Pull Request被拒绝的相关因素,主要包括修改变更的代码特性、Pull Request描述的文本特性、开发人员以前行为的贡献者特性以及Pull Request过程的交互等。实验评估了包含12个开源项目中140 155个Pull Request的有效性。结果表明,基于logistic回归模型的预测结果准确率为0.84,召回率为0.99,F1分数为0.91,相较基线方法均有一定提高。分析预测实验结果表明,通过数据挖掘中关联规则找出的影响因素对Pull Request合并结果具有足够的影响力,可以帮助开发人员将精力集中在主要因素上,或分配更多资源来克服关键问题,有利于避免开发人员提交的Pull Request被拒绝,减少项目成本和时间。 展开更多
关键词 Pull Request 影响因素 数据挖掘 回归模型 GitHub
暂未订购 下载PDF
腹膜透析“pull”拔管术并发症的影响因素及防治 认领 引用
6
作者 林则行 郭汉城 +6 位作者 姚春萌 肖良祥 戴韵馨 吴赛 王福珍 谢祖刚 姚翠微 《临床荟萃》 CAS 2025年第1期39-43,共5页
目的探讨腹膜透析(腹透)“pull”拔管术后并发症及其相关影响因素,进一步优化“pull”技术,减少并发症的发生。方法纳入2018年9月1日至2023年10月31日厦门大学附属中山医院等四家医院腹透中心的腹透患者98例及国内外公开发表关于腹透“p... 目的探讨腹膜透析(腹透)“pull”拔管术后并发症及其相关影响因素,进一步优化“pull”技术,减少并发症的发生。方法纳入2018年9月1日至2023年10月31日厦门大学附属中山医院等四家医院腹透中心的腹透患者98例及国内外公开发表关于腹透“pull”拔管术的文献(纳入中文和英文文献,排除样本量不足或描述不清的文献)中339例患者。比较其临床资料。结果腹透中心98例患者中13例出现并发症,多因素logistic回归分析提示体质量指数为腹透患者“pull”拔管术后出现并发症的独立危险因素(P<0.05)。与文献组比较,本研究组腹透管断裂、腹壁渗血占比均较大(P<0.05)。98例患者中腹透管断裂7例,可能与牵拉次数、牵拉角度、牵拉力度有关。98例患者中因拔管前外cuff距离皮肤出口小于2 cm或出口及外cuff感染8例,行改良的“pull”拔管术后,均未观察到并发症。因浅cuff反复感染及脱出7例,采用Seldinger法穿刺置管联合“pull”拔管术更换腹透管。结论“pull”拔管术是一种简单、可行、经济、并发症少且可控的非侵入性拔管方法。 展开更多
关键词 腹膜透析 “pull”拔管术 并发症 影响因素分析
暂未订购 下载PDF
“Push”and“Pull”Factors Influencing Rural College Students’Grassroots Employment in the Context of the Rural Revitalization Strategy from the Perspective of Counselor Guidance 认领 引用
7
作者 Ji LIU Jiasen PAN 《Asian Agricultural Research》 2025年第12期9-12,17,共4页
This study focuses on the talent supply-demand contradiction in grassroots employment under the Rural Revitalization Strategy.It systematically analyzes the internal and external driving mechanisms behind rural colleg... This study focuses on the talent supply-demand contradiction in grassroots employment under the Rural Revitalization Strategy.It systematically analyzes the internal and external driving mechanisms behind rural college students decisions to pursue careers at the grassroots level,exploring the"push-pull"factors and the guiding role of university counselors.Employing a mixed-methods approach combining literature review and in-depth interviews,the analysis reveals that urban employment competition pressure,high cost of living coupled with economic burdens,and household registration and social resource barriers constitute the primary"push"factors.Conversely,national policy support,emotional attachment to one s hometown and the need for value realization,as well as grassroots development opportunities and growth potential,serve as the main"pull"factors.University counselors play a significant guiding role in the employment decision-making process of rural college students.Through ideological guidance,information dissemination,capacity building,and psychological support,they enhance students job-seeking capabilities and adaptability to grassroots work,thereby strengthening their identification with such career paths.This paper provides practical insights for counselors facilitating the return of rural college students to grassroots employment. 展开更多
关键词 Rural college students Grassroots employment Push and Pull factors Counselor guidance Rural revitalization
暂未订购 下载PDF
CTCPPre: A prediction method for accepted pull requests in GitHub 认领 引用 被引量：5
8
作者 JIANG Jing ZHENG Jia-teng +1 位作者 YANG Yun ZHANG Li 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第2期449-468,共20页
As the popularity of open source projects,the volume of incoming pull requests is too large,which puts heavy burden on integrators who are responsible for accepting or rejecting pull requests.An accepted pull request ... As the popularity of open source projects,the volume of incoming pull requests is too large,which puts heavy burden on integrators who are responsible for accepting or rejecting pull requests.An accepted pull request prediction approach can help integrators by allowing them either to enforce an immediate rejection of code changes or allocate more resources to overcome the deficiency.In this paper,an approach CTCPPre is proposed to predict the accepted pull requests in GitHub.CTCPPre mainly considers code features of modified changes,text features of pull requests’description,contributor features of developers’previous behaviors,and project features of development environment.The effectiveness of CTCPPre on 28 projects containing 221096 pull requests is evaluated.Experimental results show that CTCPPre has good performances by achieving accuracy of 0.82,AUC of 0.76 and F1-score of 0.88 on average.It is compared with the state of art accepted pull request prediction approach RFPredict.On average across 28 projects,CTCPPre outperforms RFPredict by 6.64%,16.06%and 4.79%in terms of accuracy,AUC and F1-score,respectively. 展开更多
关键词 accepted pull request prediction code review GitHub pull-based software development
暂未订购 下载PDF
A woman broke the world record for pull⁃ups 认领 引用
9
作者 胡金莹 《疯狂英语（新读写）》 2025年第9期55-56,79,共2页
A 34⁃year⁃old Australian woman broke the Guinness World Record for the most pull⁃ups performed by a woman in 24 hours by doing 7,079 pull⁃ups.To say Olivia Vinson put the old record for most pull⁃ups by a woman in 24 ... A 34⁃year⁃old Australian woman broke the Guinness World Record for the most pull⁃ups performed by a woman in 24 hours by doing 7,079 pull⁃ups.To say Olivia Vinson put the old record for most pull⁃ups by a woman in 24 hours to shame would be an understatement,considering that the Australian fitness enthusiast nearly doubled it.The achieve⁃ment began as a wild proposition from her husband and coach,and even though initially she just laughed at the idea of challenging a world record,it eventually started to make sense.Olivia trained for three months before taking on the challenge in September of last year,but 12 hours into her attempt,she pulled a bicep tendon(肱二头肌腱),which made her unable to perform pull⁃ups anymore.She had to cancel the whole thing,but after healing for a few months,she was back to breaking the Guinness World Record. 展开更多
关键词 pull ups guinness world record fitness enthusiast Olivia Vinson bicep tendon
暂未订购 下载PDF
Push/Pull和CONWIP/Pull生产控制模式对比分析 认领 引用 被引量：7
10
作者 林勇 乐晓娟 付秋芳 《工业工程》 2006年第2期6-10,共5页
针对制造企业如何有效地进行生产控制的问题,对Push/Pull、CONWIP、CONWIP/Pull生产控制模式作了详细介绍,对比分析了Push/Pull、CONWIP/Pull两种混合生产控制,对混合生产控制方法做出了研究展望。
关键词 生产控制模式 Push/Pull CONWIP/Pull 对比分析
暂未订购 下载PDF
Parameters Design of Pull-off Deceptive Jamming to Terminal Guidance Radar 认领 引用 被引量：5
11
作者 李云杰 张延彬 高梅国 《Journal of Beijing Institute of Technology》 EI CAS 2010年第3期362-366,共5页
A deceptive pull-off jamming method to terminal guidance radar is put forward in this paper.The design rules about the important jamming parameters are discussed in detail,including the number of the decoy targets in ... A deceptive pull-off jamming method to terminal guidance radar is put forward in this paper.The design rules about the important jamming parameters are discussed in detail,including the number of the decoy targets in range dimension,the velocity of the range gate pull-off,and the number of the decoy targets in velocity dimension and the velocity of the Doppler frequency pull-off.Also,the steps to design these parameters are brought out.The rules and design procedure discussed in this paper have important meaning for the choice of the reasonable jamming parameters in the practical applications,which can help to obtain good jamming effect. 展开更多
关键词 terminal guidance radar deceptive jamming range gate pull-off velocity Doppler frequency pulloff velocity
暂未订购 下载PDF
Mechanical properties and supporting effect of CRLD bolts under static pull test conditions 认领 引用 被引量：15
12
作者 Xiao-ming Sun Yong Zhang +3 位作者 Dong Wang Jun Yang Hui-chen Xu Man-chao He 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第1期1-9,共9页
A device for supporting soft rock masses combined with a constant resistance structure characterized by constant resistance and large deformation at the end of a steel bar, known as the constant resistance and large d... A device for supporting soft rock masses combined with a constant resistance structure characterized by constant resistance and large deformation at the end of a steel bar, known as the constant resistance and large deformation（CRLD） bolt, has recently been developed to counteract soft rock swelling that often occurs during deep mining. In order to further study the mechanical properties of the CRLD bolt, we investigated its mechanical properties by comparison with the conventional strength bolt（rebar） using static pull tests on many aspects, including supporting capacity, elongation, radial deformation, and energy absorption. The tests verified that the mechanical defects of the rebar, which include the decrease of bolt diameter, reduction of supporting capacity, and emergence and evolution of fracture until failure during the whole pull process, were caused by the Poisson＇s ratio effect. Due to the special structure set on the CRLD bolt, the bolt presents a seemingly unusual phenomenon of the negative Poisson＇s ratio effect, i.e., the diameter of the constant resistance structure increases while under-pulling. It is the very effect that ensures the extraordinary mechanical properties, including high resistance, large elongation, and strong energy absorption. According to the comparison and analysis of numerical simulation and field test, we can conclude that the CRLD bolt works better than the rebar bolt. 展开更多
关键词 deep mining bolts mechanical properties rock support static pull test
暂未订购 下载PDF
Theoretical and experimental study of the pulling force of jet bits in radial drilling technology 认领 引用 被引量：7
13
作者 Ruichang Guo Gensheng Li +3 位作者 Zhongwei Huang Shouceng Tian Xiaoning Zhang Wei Wu 《Petroleum Science》 SCIE CAS 2009年第4期395-399,共5页
Radial drilling technology, of which the jet bit is the key device, is a research focus in the field of oil drilling and production. This paper establishes mechanical equations for jet bits and analyzes the hydroseal ... Radial drilling technology, of which the jet bit is the key device, is a research focus in the field of oil drilling and production. This paper establishes mechanical equations for jet bits and analyzes the hydroseal of backward jets in bottom holes. Meanwhile this paper establishes a mechanical equation for a high pressure hose and analyzes the axial force distribution. Laboratory experiments indicate that the flow rate, the angle between the backward nozzle axis and the jet bit axis, and the hole diameter are the major influencing factors; the generation of the pulling force is mainly due to the inlet pressure of the jet bit; the backward jets can significantly increase not only the pulling force but also the stability of jet bits. The pulling force would reach 8,376 N under experimental conditions, which can steadily pull the high-pressure hose forward. 展开更多
关键词 Radial drilling water jet jet bit depression effect pulling force
暂未订购 下载PDF
Transumbilical enterostomy for Hirschsprung’s disease with a two-stage laparoscopy-assisted pull-through procedure 认领 引用 被引量：5
14
作者 Pei-Pei Xu Xiao-Pan Chang +6 位作者 Xi Zhang Shui-Qing Chi Guo-Qing Cao Shuai Li De-Hua Yang Xiang-Yang Li Shao-Tao Tang 《World Journal of Gastroenterology》 SCIE CAS 2019年第46期6781-6789,共9页
BACKGROUND A one-stage laparoscopic operation has recently been considered a favorable option for the management of patients with Hirschsprung's disease(HD)due to its superior cosmetic results.One-stage transanal ... BACKGROUND A one-stage laparoscopic operation has recently been considered a favorable option for the management of patients with Hirschsprung's disease(HD)due to its superior cosmetic results.One-stage transanal endorectal pull-through for the treatment of rectosigmoid HD has been widely used in newborns without complications.However,enterostomy is required in some HD cases for enterocolitis and dilated colon.Our transumbilical enterostomy(TUE)and twostage laparoscopy-assisted anorectoplasty were effective and achieved a similar cosmetic effect to one-stage laparoscopy on the abdominal wall in patients with anorectal malformation,but the effect in patients with HD is unclear.AIM To evaluate the safety,efficacy and cosmetic results of TUE in two-stage laparoscopy-assisted pull-through for HD.METHODS From June 2013 to June 2018,53 patients(40 boys,13 girls;mean age at enterostomy:5.5±2.2 mo)who underwent enterostomy and two-stage laparoscopy-assisted pull-through for HD with stoma closure were reviewed at our institution.Two enterostomy approaches were used:TUE in 24 patients,and conventional abdominal enterostomy(CAE)in 29 patients.Eleven patients with rectosigmoid HD had severe preoperative enterocolitis or a dilated colon.26 patients had long-segment HD,and 16 patients had total colonic aganglionosis(TCA).The patients with left-sided HD underwent the two-stage laparoscopic Soave procedure,and the patients with right-sided HD and TCA underwent the laparoscopic Duhamel procedure.Demographics,enterostomy operative time,complications and cosmetic results were respectively evaluated.RESULTS There were no differences between the groups with respect to gender,age at enterostomy,weight and clinical type(P>0.05).No conversion to open technique was required.Two patients experienced episodes of stomal mucosal prolapse in the TUE group and 1 patient in the CAE group(8.33%vs 3.45%,P>0.05).No parastomal hernia was observed in either of the two groups.Wound infection at the stoma was seen in 1 case in the TUE group,and 2 cases in the CAE group(4.17%vs 6.90%,P>0.05).No obstruction was noted in any of the patients in the TUE group,whereas obstruction was found in 1 patient in the CAE group.Enterocolitis was observed in 3 and 5 patients in the TUE and CAE group,respectively(12.50%vs 17.24%,P>0.05).There was no significant difference between the TUE group and CAE group in terms of the incidence of soiling and constipation(P>0.05).The cosmetic result using the scar score in the TUE group was better than that in the CAE group(6.83±0.96 vs 13.32±1.57,P<0.05).CONCLUSION TUE is a safe and feasible method for the treatment of HD,and the staged enterostomy and two-stage laparoscopy-assisted pull-through achieved a similar cosmetic effect to the one-stage laparoscopic procedure. 展开更多
关键词 Hirschsprung's disease Transumbilical enterostomy Conventional abdominal enterostomy Laparoscopy Pull through Cosmetic result
暂未订购 下载PDF
Microstructure and mechanical properties of friction pull plug welding for2219-T87 aluminum alloy with tungsten inert gas weld 认领 引用 被引量：9
15
作者 Zhen Shao Lei Cui +4 位作者 Lijun Yang Peng Lu Huimiao Wang Zhuanping Sun Jianling Song 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第6期1216-1224,共9页
The friction pull plug welding(FPPW)of the 2219-T87 tungsten inert gas(TIG)welded joint was investigated,and the microstructures,precipitate evolution,mechanical properties,and fracture morphologies of this joint were... The friction pull plug welding(FPPW)of the 2219-T87 tungsten inert gas(TIG)welded joint was investigated,and the microstructures,precipitate evolution,mechanical properties,and fracture morphologies of this joint were analyzed and discussed.In this study,defectfree joints were obtained using a rotational speed of 7000 r/min,an axial feeding displacement of 12 mm,and an axial force of 20-22 kN.The results indicated that within these welding parameters,metallurgical bonding between the plug and plate is achieved by the formation of recrystallized grains.The microstructural features of the FPPW joint can be divided into different regions,including the heat-affected zone(HAZ),thermomechanically affected zone(TMAZ),recrystallization zone(RZ),heat-affected zone in the TIG weld(TIG-HAZ),and the thermomechanically affected zone in the TIG weld(TIG-TMAZ).In the TIG-TMAZ,the grains were highly deformed and elongated due to the shear and the extrusion that produces the plug during the FPPW process.The main reason for the softening in the TMAZ is determined to be the dissolution ofθ’and coarsening ofθprecipitate particles.In a tensile test,the FPPW joint welded with an axial force of 22 kN showed the highest ultimate tensile strength of 237 MPa.The locations of cracks and factures in the TIG-TMAZ were identified.The fracture morphology of the tensile sample showed good plasticity and toughness of the joints. 展开更多
关键词 friction pull plug welding tungsten inert gas weld microstructures constituent particles mechanical properties
暂未订购 下载PDF
Exploiting push-pull strategy to combat the tea green leafhopper based on volatiles of Lavandula angustifolia and Flemingia macrophylla 认领 引用 被引量：13
16
作者 HAN Shan-jie WANG Meng-xin +3 位作者 WANG Yan-su WANG Yun-gang CUI Lin HAN Bao-yu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2020年第1期193-203,共11页
Thirteen volatile compounds were identified from Flemingia macrophylla plants. Eight major components significantly attracted the tea green leafhoppers, Empoasca flavescens F. Based on their relative abundances, follo... Thirteen volatile compounds were identified from Flemingia macrophylla plants. Eight major components significantly attracted the tea green leafhoppers, Empoasca flavescens F. Based on their relative abundances, following synthetic blends were made for field experiments: 1) eight-component-attractant blend included Z-3-hexen-1-ol, Z-3-hexenyl acetate, Z-ocimene, Me SA, Z-3-hexenyl butyrate, dodecane, hexadecane and nonanal at 10, 10, 1, 11, 2, 6, 2 and 4 mg mL^-1 in n-hexane, respectively;2) four-component-attractant blend #1 contained hexadecane, Z-3-hexenyl acetate, Z-3-hexen-1-ol and nonanal at 2, 10, 10 and 4 mg mL^-1 in n-hexane, respectively;3) four-component-attractant blend #2 contained hexadecane, Z-3-hexenyl acetate, Z-3-hexen-1-ol and Me SA at 2, 10, 10 and 11 mg mL^-1 in n-hexane, respectively. Thymol and 1-methoxy-4-methyl-2-(1-methylethyl)-benzene, identified from Lavandula angustifolia aeration samples, significantly repelled the leafhopper as strong repellents when tested alone or in combination at 10 mg mL^-1. For field bioassays, each attractant lure was attached to a bud green sticky board hung from a bamboo stick at above tea plant level for catching the leafhoppers, whereas the repellent dispenser was tied to a tea branch inside tea clump for pushing the leafhoppers away from tea clumps. The results showed that the eight-component-attractant blend caught similar numbers of the leafhopper as did the four-component-attractant blend #1 at about 53–79 leafhoppersrap/day, which were significantly higher than those on the hexane-control bud green sticky boards. Average leafhopper catches from un-baited sticky boards were about 51–73 leafhoppersrap/day when pushed by the repellents placed inside tea plants, with the two-component-repellent blend being more effective than their single components. When the two-component-repellent blend was further tested with the three attractant blends in a push-pull fashion, average trap catches ranged from 62 to 92 leafhoppersrap/day. Control efficacy on the leafhoppers within the push-pull zones increased progressively from day 1(43%) to day 5(73%). This push-pull approach might have a great potential as a green control strategy for combating the tea green leafhoppers. 展开更多
关键词 push-pull strategy attractants repellents Flemingia macrophylla tea green leafhopper tea plantation
暂未订购 下载PDF
大粒度Pull Request描述自动生成 认领 引用 被引量：2
17
作者 邝砾 施如意 +2 位作者 赵雷浩 张欢 高洪皓 《软件学报》 EI CSCD 北大核心 2021年第6期1597-1611,共15页
在GitHub平台中,许多项目贡献者在提交Pull Request(PR)时往往会忽略提交PR描述,这使得提交的PR容易被评审者忽略或者拒绝.因此,自动生成PR描述以帮助项目贡献者提高PR通过率是很有必要的.然而,现有PR描述生成方法的表现会受到PR粒度影... 在GitHub平台中,许多项目贡献者在提交Pull Request(PR)时往往会忽略提交PR描述,这使得提交的PR容易被评审者忽略或者拒绝.因此,自动生成PR描述以帮助项目贡献者提高PR通过率是很有必要的.然而,现有PR描述生成方法的表现会受到PR粒度影响,无法有效为大粒度的PR生成描述.因此,该工作专注于大粒度PR描述的自动生成.首先对PR中的文本信息进行预处理,将文本中的单词作为辅助节点构建词-句异质图,以建立PR语句间的联系;随后对异质图进行特征提取,并将提取后的特征输入至图神经网络进行图表示学习,通过节点间的消息传递,使句子节点学习到更丰富的内容信息;最后,选择带有关键信息的句子组成PR描述.此外,针对PR数据集缺少人工标注的真实标签而无法进行监督学习的问题,使用强化学习指导PR描述的生成,以最小化获得奖励的负期望为目标训练模型,该过程与标签无关,并且直接提升了生成结果的表现.在真实的数据集上进行了实验,实验结果表明,提出的大粒度PR描述生成方法在F1值和可读性上优于现有方法. 展开更多
关键词 Pull Request描述 异质图神经网络 强化学习 非结构性文档 摘要生成
暂未订购 下载PDF
GST Pull-down实验鉴定NF-κB相互作用多肽 认领 引用 被引量：5
18
作者 李生茂 梁华平 +1 位作者 徐祥 刘东擘 《免疫学杂志》 CAS 北大核心 2006年第1期94-97,共4页
目的体外鉴定NF-κB相互作用多肽与p50和p65间的相互作用。方法首先构建GST-作用多肽融合蛋白的原核表达载体pET-42a/polypeptide及NF-κB p50和p65亚基保守结构域的原核表达载体pET22b/p50和pET22b/p65,并在大肠杆菌E.coliBL-21中诱导... 目的体外鉴定NF-κB相互作用多肽与p50和p65间的相互作用。方法首先构建GST-作用多肽融合蛋白的原核表达载体pET-42a/polypeptide及NF-κB p50和p65亚基保守结构域的原核表达载体pET22b/p50和pET22b/p65,并在大肠杆菌E.coliBL-21中诱导表达,后进行GST pull-down实验验证多肽与NF-κB p50和p65的结合效应。结果经诱导表达获得了可溶性的GST-多肽融合蛋白和具有DNA结合活性的p50p、65蛋白,GST pull-down实验证实3条多肽与p50发生特异地相互作用。结论证实3条多肽在体外能与p50发生物理性的相互作用,这为获得靶向NF-κB的功能拮抗多肽工作奠定了基础。 展开更多
关键词 GST Pull—down实验 多肽 NF—κB p50/p65 蛋白间相互作用
暂未订购 下载PDF
应用GST pull-down技术筛选番茄SIVQ6互作蛋白 认领 引用 被引量：4
19
作者 原贵波 莫双榕 +5 位作者 钱莹 臧栋楠 杨帆 蒋红亮 武媛 丁海东 《中国农业科学》 CAS CSCD 北大核心 2020年第15期3146-3157,共12页
【目的】含有VQ基序(VQ)的蛋白质是植物特异性蛋白质,具有保守的“FxxhVQxhTG”氨基酸序列,调节植物生长和发育。番茄SlMPK1在高温胁迫过程中发挥重要作用,酵母双杂交(Y2H)显示SlVQ6蛋白能够与SlMPK1相互作用,通过GST pull-down技术进... 【目的】含有VQ基序(VQ)的蛋白质是植物特异性蛋白质,具有保守的“FxxhVQxhTG”氨基酸序列,调节植物生长和发育。番茄SlMPK1在高温胁迫过程中发挥重要作用,酵母双杂交(Y2H)显示SlVQ6蛋白能够与SlMPK1相互作用,通过GST pull-down技术进一步验证SlMPK1与SlVQ6的互作以及SlVQ6的互作网络,为研究SlVQ6介导的高温应答信号通路奠定基础。【方法】通过pGEX-4T-1-PC-VQ6质粒构建,以含有目的基因SIVQ6的菌液为模板,设计特异性引物,扩增目的基因序列,将获得的目的基因VQ6克隆到载体pGEX-4T-1的BamHⅠ和NotⅠ的酶切位点之间,将获得的重组质粒pGEX-4T-1-PC-VQ6转入TOP10克隆菌株经IPTG(异丙基硫代半乳糖苷)诱导表达,通过GST柱亲和纯化获得目标蛋白PC-VQ6,进而获得预期GST-SlVQ6融合蛋白,通过体外磷酸化进一步确定SlVQ6是否是SlMPK1的下游底物;以GST-SlVQ6为诱饵蛋白固定于GST Sepharose Beads上,与番茄叶片总蛋白孵育后洗脱,收集洗脱液进行SDS-PAGE凝胶电泳验证,通过LC-MS/MS检测SlVQ6可能互作的候选蛋白,并对筛选的SIVQ6互作蛋白通过GO、KEGG和蛋白互作网络进行生物信息学分析。【结果】成功构建pGEX-4T-1-PC-SlVQ6基因重组表达质粒,并获得带有GST标签的GST-SlVQ6融合蛋白,其分子量大小约为54 kD;将GST-SlVQ6和His-SlMPK1进行体外磷酸化试验,SlMPK1能够磷酸化SlVQ6,而作为阴性对照的GST与SlMPK1无相互作用,且SlVQ6不存在自磷酸化的现象,表明GST-SlVQ6和His-SlMPK1具有相互作用,且SlVQ6是SlMPK1的下游底物;以GST-SlVQ6融合蛋白为诱饵蛋白(空GST为阴性对照),利用pull-down试验筛选番茄叶片组织蛋白中与SlVQ6蛋白结合的蛋白,经SDS-PAGE分离、液相色谱-串联质谱(LC-MS/MS)鉴定以及Mascot与蛋白数据库检索,共鉴定出37个与SlVQ6结合的蛋白,包括蛋白激酶Receptor for Activated C Kinase 1B(RACK1B),通过GO、KEGG和蛋白互作网络的生物信息学分析,表明这些蛋白参与多种信号通路,其中8个核糖体蛋白可能与高温胁迫密切相关。【结论】SlVQ6是SlMPK1的底物蛋白,且37个蛋白可能与SlVQ6互作,这些蛋白与胁迫反应有着密切的联系,可能会在提高番茄植株高温耐受性等方面发挥重要作用。 展开更多
关键词 番茄 SlVQ6 SlMPK1 pull-down 互作蛋白
暂未订购 下载PDF
一种磁微执行器Pull-in模型 认领 引用 被引量：6
20
作者 方玉明 黄庆安 李伟华 《Journal of Semiconductors》 CAS 北大核心 2007年第10期1647-1651,共5页
与静电微执行器类似,磁微执行器中也存在重要的Pull-in失稳问题.对于宏观器件,由于磁芯磁阻可以忽略,所以可以利用电磁类比,得到Pull-in失稳参数.但对于微观器件,磁芯磁阻不可以忽略,也不可以利用电磁类比.文中首先采用力法对磁微执行器... 与静电微执行器类似,磁微执行器中也存在重要的Pull-in失稳问题.对于宏观器件,由于磁芯磁阻可以忽略,所以可以利用电磁类比,得到Pull-in失稳参数.但对于微观器件,磁芯磁阻不可以忽略,也不可以利用电磁类比.文中首先采用力法对磁微执行器Pull-in的失稳现象进行了分析和建模,考虑了微磁芯磁阻,在建立磁微执行器动态小信号模型的基础上,导出了两个Pull-in失稳方程.通过求解这两个方程,可以得到Pull-in失稳电流和位置两个重要参数.然后又采用能量法研究了同样的Pull-in失稳现象,得出了和力法相同的结论.最后,给出了一个分析实例,以反映微磁芯磁阻对Pull-in的影响.文中的结论对于磁微执行器的设计具有重要意义. 展开更多
关键词 磁 微执行器 Pull-in
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈