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单侧双通道内镜下单纯减压与腰椎椎间融合术治疗Ⅰ度退变性腰椎滑脱的疗效比较研究

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中国修复重建外科杂志 2024年第2期38卷 169-175页

作者：付豪胡宇童杨东方王鑫许卫兵大连医科大学研究生院辽宁大连116044 大连市中心医院骨科辽宁大连116033 苏州大学附属第二医院骨科/骨质疏松中心江苏苏州215006 苏州大学研究生院江苏苏州215006 海军军医大学附属长征医院骨科上海200003

目的比较单侧双通道内镜(unilateral biportal endoscopy,UBE)下单纯减压与腰椎椎间融合术(unilateral biportal endoscopic lumbar interbody fusion,ULIF)治疗Ⅰ度退变性腰椎滑脱(degenerative lumbar spondylolisthesis,DLS)的疗效。方法回顾性分析2021年10月—2022年10月收治并符合选择标准的58例Ⅰ度DLS患者临床资料,其中采用UBE下单纯减压治疗28例(减压组)、ULIF治疗30例(ULIF组)。两组患者性别、年龄、手术节段以及术前腰痛疼痛视觉模拟评分(VAS)、腿痛VAS评分、Oswestry功能障碍指数(ODI)、C反应蛋白(C-reactive protein,CRP)、红细胞沉降率(erythrocyte sedimentation rate,ESR)、椎间盘高度(disk height,DH)、节段前凸(segmental lordosis,SL)等基线资料比较,差异均无统计学意义(P>0.05)。比较两组手术时间、术后引流量、术后离床活动时间,术后腰痛VAS评分、腿痛VAS评分、ODI、实验室检查指标(CRP、ESR)、影像学参数(DH、SL)。结果与ULIF组相比,减压组手术时间短、术后引流量少且患者开始离床活动更早,差异均有统计学意义(P0.05),而ULIF组术后3 d上述指标均较术前升高(P0.05)外,两组腰、腿痛VAS评分其他时间点间比较,差异均有统计学意义(P0.05)。两组术后ODI均较术前改善(P0.05);术后两时间点组间差异均无统计学意义(P0.05);而ULIF组上述两指标均较术前升高,差异有统计学意义(P<0.05)。两组间DH、SL手术前后差值比较,差异有统计学意义(P<0.05)。结论UBE下单纯减压治疗Ⅰ度DLS可取得良好疗效,与ULIF相比可缩短手术时间、减少术后引流量、促进患者早期离床活动,炎症反应小,术后恢复快;但ULIF对于恢复椎间盘高度、节段前凸更有优势。

关键词：退变性腰椎滑脱单侧双通道内镜减压椎间融合术

氮添加下丛枝菌根真菌对羊草生长及养分吸收的影响

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中国草地学报 2024年第5期46卷 44-51页

作者：周小国胡雨彤赵婷婷郭亮廖雨刘公社王永斌新疆农业大学资源与环境学院新疆乌鲁木齐830052 新疆土壤与植物生态过程重点实验室新疆乌鲁木齐830052 中国科学院植物研究所北方资源植物重点实验室北京100093 新疆锦芳园草原生态科技开发有限公司新疆呼图壁831200

为了解氮添加和丛枝菌根真菌对羊草生长及养分吸收的影响,本研究以干旱区羊草为对象,采用苯菌灵抑制土著AMF水平,测定5个氮水平(0、2.5、5.0、10.0、20.0 g N/m^(2))下的羊草菌根侵染率、土壤孢子密度、生物量、株高、光合特性、植株碳... 详细信息

为了解氮添加和丛枝菌根真菌对羊草生长及养分吸收的影响,本研究以干旱区羊草为对象,采用苯菌灵抑制土著AMF水平,测定5个氮水平(0、2.5、5.0、10.0、20.0 g N/m^(2))下的羊草菌根侵染率、土壤孢子密度、生物量、株高、光合特性、植株碳、氮及磷含量。结果表明,苯菌灵处理(-AMF处理)显著降低羊草菌根侵染率和土壤孢子密度(P<0.05),降低幅度分别为33.02%~71.36%和48.03%~57.14%。氮和AMF显著增加了羊草地上部生物量(P<0.05),同时羊草地下生物量也表现增加趋势,但对株高和根冠比无显著影响。氮添加对羊草净光合速率、蒸腾速率和气孔导度有一定影响,但不同氮添加水平下-AMF处理对羊草光合特性无显著影响。-AMF处理降低了羊草植株碳、氮及磷含量。通径分析表明,氮添加是影响植株氮和磷含量的主要因素,其次是植株碳含量,最后是AMF。综上所述,AMF通过显著影响羊草植株碳含量从而对氮和磷含量产生影响。

关键词：羊草氮添加丛枝菌根真菌光合特性养分吸收

HTDcr:a job execution framework for high-throughput computing on supercomputers

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Science China(Information Sciences) 2024年第1期67卷 69-85页

作者： Jiazhi JIANG Dan huANG hu CHEN yutong LU Xiangke LIAO School of Computer Science and Engineering Sun Yat-sen University School of Software Engineering South China University of Technology

High-throughput computing(HTC) is a computing paradigm that aims to accomplish jobs by easily breaking them into smaller,independent ***,it requires a large amount of computing power for a long *** existing HTC frameworks are job-oriented without support for coscheduling with hardware architecture and task-level ***,most of the frameworks reach a limited scale,and their usability needs further ***,we present HTDcr,a job execution framework for the HTC on *** study aims to improve the throughput,task dispatching,and usability of the *** detail,the throughput optimizations include a sophisticated designed task management system,a hierarchical scheduler,and the co-optimization of the task-scheduling strategy with the application and hardware *** optimizations for usability include a programable execution workflow,mechanisms for more robust and reliable service qualities,and a fine-grained resource allocation system for the colocation of multiple *** to our evaluations,HTDcr can achieve outstanding scalability and high throughput on large-scale clusters for the HTC *** evaluate HTDcr with several microbenchmarks and real-world applications on Tianhe-2 and Sunway TaihuLight to demonstrate its effects on existing design *** instance,the task scheduling for two real-world applications integrated with the application and hardware characteristics achieves 1.7× and 1.9× speedups over the basic task-scheduling strategy.

关键词： high-throughput computing supercomputer task scheduling middleware password guessing

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施用不同肥料对藜麦光合生理特性的影响

天津农业科学 2024年第5期30卷 1-7页

作者：马艳雨蒋梦珂胡雨彤冯耀祖张少民贾宏涛新疆农业大学资源与环境学院新疆乌鲁木齐830052 新疆土壤与植物生态过程重点实验室新疆乌鲁木齐830052 新疆农业科学院科技成果转化中心新疆乌鲁木齐830091 新疆农业科学院核技术生物技术研究所新疆乌鲁木齐830091

探讨施用不同肥料对藜麦光合特性和产量的影响,筛选出适宜旱作藜麦优质高产栽培的最佳肥料,为新疆藜麦旱作生产提供理论参考。以藜麦品种伊藜早1号为研究对象,在盆栽条件下开展试验,共设置了5个处理,分别为不施肥处理(CK)、生物炭处理(S... 详细信息

探讨施用不同肥料对藜麦光合特性和产量的影响,筛选出适宜旱作藜麦优质高产栽培的最佳肥料,为新疆藜麦旱作生产提供理论参考。以藜麦品种伊藜早1号为研究对象,在盆栽条件下开展试验,共设置了5个处理,分别为不施肥处理(CK)、生物炭处理(S)、控释肥处理(K)、腐植酸处理(F)和当地施肥处理(D),各处理肥料均作为基肥一次性施入。测定灌浆期藜麦植株高度、茎粗、相对叶绿素含量(SPAD值)、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间二氧化碳浓度(Ci)、光能利用效率(Eu)、瞬时水分利用效率(WUE)、成熟期产量等指标。结果表明:藜麦的株高在K处理下显著增高(P<0.05);茎粗在S处理下达到最大值,其与CK和D处理相比,茎粗分别增加了49.56%和51.82%;S、K、F、D处理下的SPAD值较CK均显著增加(P<0.05);藜麦在灌浆期的Pn、Gs、Tr、Ci、Eu和WUE均在K处理下最大;S、K、F、D处理均可以提高藜麦的产量,其中K处理下主穗质量、千粒质量和产量分别比CK增长185.44%、65.00%、57.64%;相关分析表明,在灌浆期,藜麦的籽粒产量与主穗质量、千粒质量呈极显著相关,主穗质量、千粒质量与净光合速率呈极显著正相关。综上所述,在施肥量一致的情况下,控释肥处理更能满足藜麦生长后期的养分需求,进而实现藜麦高产。

关键词：藜麦光合参数控释肥产量

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Cardiac energy metabolism disorder mediated by energy substrate imbalance and mitochondrial damage upon tebuconazole exposure

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Journal of Environmental Sciences 2024年第2期136卷 270-278页

作者： Tingting Ku Jindong hu Mengmeng Zhou Yuanyuan Xie yutong Liu Xin Tan Lin Guo Guangke Li Nan Sang College of Environmental Science and Resources Research Center of Environment and HealthShanxi UniversityTaiyuan 030006China

Tebuconazole exposure has been described as an increasing hazard to human *** increasing number of recent studies have shown a positive association between tebuconazole exposure and cardiovascular disease risk,which is characterized by the reduction of adenosine triphosphate(ATP)***,researches on the damage of tebuconazole exposure to energy metabolism and the related molecular mechanisms are *** the present study,male C57BL/6 mice were treated with tebuconazole at different low concentrations for 4 *** results indicated that tebuconazole could accumulate in the heart and further induce the decrease of ATP content in the mouse ***,tebuconazole induced an obvious shift in substrate utilization of fatty acid and glucose by disrupting their corresponding transporters(GLUT1,GLUT4,CD36,FABP3 and FATP1)expression,and significantly repressed the expression of mitochondrial biogenesis(Gabpa and Tfam)and oxidative phosphorylation(CS,Ndufa4,Sdhb,Cox5a and Atp5b)related genes in a dosedependent *** investigation revealed that these alterations were related to the IRS1/AKT and PPARγ/RXRα*** findings contribute to a better understanding of triazole fungicide-induced cardiovascular disease by revealing the key indicators associated with this phenomenon.

关键词： Tebuconazole Cardiotoxicity Energy metabolic disorders Energy substrate Mitochondrial damage

Optimization of Grain Boundary Character Distribution in Fe-18Cr-18Mn-0.63N High-Nitrogen Austenitic Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2013年第5期26卷 497-502页

作者： Feng SHI Xiaowu LI yutong hu Chuan SU Chunming LIU Institute of Materials Physics and Chemistry College of Sciences Northeastern University School of Materials and Metallurgy Northeastern University

Grain boundary engineering（GBE） is a practice of improving resistance to grain boundary failure of the material through increasing the proportion of low Σ coincidence site lattice（CSL） grain boundaries（special grain boundaries） in the grain boundary character distribution（GBCD）. The GBCD in a cold rolled and annealed Fe-18Cr-18Mn-0.63N high-nitrogen austenitic stainless steel was analyzed by electron back scatter difraction（EBSD）. The results show that the optimization process of GBE in the conventional austenitic stainless steel cannot be well applied to this high-nitrogen austenitic stainless steel. The percentage of low ΣCSL grain boundaries could increase from 47.3% for the solid solution treated high-nitrogen austenitic stainless steel specimen to 82.0% for the specimen after 5% cold rolling reduction and then annealing at 1423 K for 10 *** special boundaries of high proportion efectively interrupt the connectivity of conventional high angle grain boundary network and thus achieve the GBCD optimization for the high-nitrogen austenitic stainless steel.

关键词： High nitrogen austenitic stainless steel Grain boundary character distri-bution CSL grain boundary EBSD

Molecular mechanism of lycopene cyclases regulating carotenoids ratio in different branches during tea leaf and flower development

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Horticultural Plant Journal 2023年第6期9卷 1177-1192页

作者： Anqi Peng Xiaoyan Tang Yingying Feng Yun huang Jilai Cui Kai Tian Mengqian Lu Yifan Zhao Yuting Pan Sanjin Wang yutong hu Wei Zhao Chuankui Song Qiang Wang State Key Laboratory of Tea Plant Biology and Utilization and International Joint Laboratory on Tea Chemistry and Health Effects Anhui Agricultural UniversityAnhuiHefei 230036China Hefei Ecological Environment Monitoring Center AnhuiHefei 230036China College of Life Science Xinyang Normal UniversityXinyangHenan 464000China Henan Field Observation and Research Station of Headwork Wetland Ecosystem of the Central Route of South-to-North Water Diversion Project School of Life Sciences and Agricultural EngineeringNanyang Normal UniversityNanyangHenan 473061China

Carotenoids are essential components in tea quality, contributing to leaf color and aroma. However, little information about carotenoids in different tea cultivars and their biosynthesis regulation mechanism during leaf development is known. Here we analyzed carotenoids by HPLC in the buds and leaves of 113 tea cultivars harvested on the same day. By profile clustering, carotenoids were divided into five groups. Same group cultivars displayed divergence in the total content of carotenoids but a similar molar ratio. To figure out the molecular mechanisms of this phenomenon, we further characterized all functional lycopene cyclases, which are the branch point of the carotenoid biosynthesis pathway. Two β-lycopene cyclases(CsLCYB1 and CsLCYB2) and one ε-lycopene cyclase(CsLCYE1) were cloned. Subcellular localization analysis showed that all cloned CsLCYs were localized in plastids. Enzyme activity assays in E. coli indicated both CsLCYBs catalyzed lycopene into β-carotene, and CsLCYE1 produced δ-carotene and ε-carotene. We found CsLCYB1 and CsLCYE1 predominantly expressed in leaf, while CsLCYB2was mainly expressed during flowering stages. Suppression by antisense oligonucleotides reduced CsLCYB1 and CsLCYE1 transcripts and led to reduction of both β,β-branch and β,ε-branch carotenoids in leaf. The expression levels of CsLCYB1 showed a significant positive correlation withβ,β-branch carotenoids in leaf. Our study provides carotenoid profiles of different tea cultivars, which can assist tea producers in selecting cultivars of interest. Meanwhile, we proposed the molecular mechanism of carotenoids reflecting the tenderness of tea plant leaf from a metabolic flux perspective, and suggested lycopene cyclase that could be applied to the breeding of tea varieties with different branch carotenoids.

关键词： Camellia sinensis Carotenoids Lycopene cyclase Metabolicﬂux Leaf development Flower

Optimization of groove texture profile to improve hydrodynamic lubrication performance:Theory and experiments

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Friction 2020年第1期8卷 83-94页

作者： Wei WANG Yongyong HE Jun ZHAO Junyuan MAO yutong hu Jianbin LUO State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Intelligent&Connected Vehicle Testing Department China Software Testing CenterBeijing 100048China

It is well known that groove texture with a careful design can be used to enhance the load‐carrying capacity of oil film under the conditions of hydrodynamic *** this study,a general parametric model was developed,and agenetic algorithm‐sequential quadratic programming hybrid method was adopted to obtain the global‐optimum profile of the groove *** optimized profiles at different rotating speeds are all *** numerical analysis results verified the effect of the *** addition to the numerical optimization,experiments were conducted to validate the superiority of the optimized *** experimental results show that the optimized groove texture can efficiently reduce the coefficient of friction(COF)and the temperature rise of the *** particular,the optimized groove textures can achieve stable ultra‐low COF values(COF<0.01)under certain conditions.

关键词： groove texture hydrodynamic lubrication laser texturing ultra‐low coefficient of friction

Theoretical study on the effective thermal conductivity of silica aerogels based on a cross-aligned and cubic pore model

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Chinese Physics B 2024年第6期33卷 28-36页

作者：郑坤灿李震东曹豫通刘犇胡君磊 School of Energy and Environment Inner Mongolia University of Science and TechnologyBaotou 014010China Inner Mongolia Key Laboratory of Efficient and Clean Combustion Baotou 014010China

Aerogel nanoporous materials possess high porosity, high specific surface area, and extremely low density due to their unique nanoscale network structure. Moreover, their effective thermal conductivity is very low, making them a new type of lightweight and highly efficient nanoscale super-insulating material. However, prediction of their effective thermal conductivity is challenging due to their uneven pore size distribution. To investigate the internal heat transfer mechanism of aerogel nanoporous materials, this study constructed a cross-aligned and cubic pore model(CACPM) based on the actual pore arrangement of SiO_(2) aerogel. Based on the established CACPM, the effective thermal conductivity expression for the aerogel was derived by simultaneously considering gas-phase heat conduction, solid-phase heat conduction, and radiative heat transfer. The derived expression was then compared with available experimental data and the Wei structure model. The results indicate that, according to the model established in this study for the derived thermal conductivity formula of silica aerogel, for powdery silica aerogel under the conditions of T = 298 K, a_(2)= 0.85, D_(1)= 90 μm, ρ = 128 kg/m^(3), within the pressure range of 0–10^(5)Pa, the average deviation between the calculated values and experimental values is 10.51%. In the pressure range of 10^(3)–10^(4)Pa, the deviation between calculated values and experimental values is within 4%. Under these conditions, the model has certain reference value in engineering verification. This study also makes a certain contribution to the research of aerogel thermal conductivity heat transfer models and calculation formulae.

关键词： silica aerogel effective thermal conductivity two pore-size structure model porous medium heat transfer