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Effects of permissive hypocaloric vs standard enteral feeding on gastrointestinal function and outcomes in sepsis

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World Journal of Gastroenterology 2021年第29期27卷 4900-4912页

作者： Jia-Kui sun Shuai Nie Yong-Ming Chen Jing zhou Xiang Wang su-Ming zhou Xin-Wei Mu Department of Critical Care Medicine Nanjing First HospitalNanjing Medical UniversityNanjing 210006Jiangsu ProvinceChina Department of Geriatric Intensive Care Unit The First Affiliated Hospital of Nanjing Medical University(Jiangsu Province People’s Hospital)Nanjing 210006Jiangsu ProvinceChina

BACKGROUND Intestinal mucosal barrier injury and gastrointestinal dysfunction are important causes of ***,few studies have investigated the effects of enteral underfeeding on gastrointestinal function in ***,no consensus on goal enteral caloric intake has been reached in *** To investigate the effects of different goal caloric requirements of enteral nutrition on the gastrointestinal function and outcomes in the acute phase of *** Patients were randomly assigned to receive 30%(defined as group A),60%(group B),or 100%(group C)of goal caloric requirements of enteral nutrition in this prospective pilot clinical *** acute gastrointestinal injury(AGI)grades,incidence of feeding intolerance(FI),daily caloric intake,nutritional and inflammatory markers,and biomarkers of mucosal barrier function were collected during the first 7 d of enteral *** clinical severity and outcome variables were also *** A total of 54 septic patients were *** days to goal calorie of group C(2.55±0.82)were significantly longer than those of group A(3.50±1.51;P=0.046)or B(4.85±1.68;P<0.001).The FI incidence of group C(16.5%)was higher than that of group A(5.0%)or B(8.7%)(P=0.009).No difference in the incidence of FI symptoms was found between groups A and *** serum levels of barrier function biomarkers of group B were significantly lower than those of group A(P<0.05)on the 7th day of *** prealbumin and IL-6 levels of group A were lower than those of group B(P<0.05)on the 7th day of *** significant differences in the clinical outcome variables or 28-d mortality were found among the three *** Early moderate enteral underfeeding(60%of goal requirements)could improve the intestinal barrier function and nutritional and inflammatory status without increasing the incidence of FI symptoms in ***,further large-scale prospective clinical trials and animal studies are required to test our fin

关键词： Enteral feeding Enteral nutrition Gastrointestinal function Intestinal mucosal barrier Sepsis

Impact of Media Information on Social Response in Disasters:A Case Study of the Freezing‑Rain and Snowstorm Disasters in Southern China in 2008

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International Journal of Disaster Risk Science 2024年第1期15卷 73-87页

作者： Jia He Wenjing Duan Yuxuan zhou Yun su College of Geographic Science and Tourism Xinjiang Normal UniversityUrumqi 830054China Xinjiang Laboratory of Lake Environment and Resources in Arid Zone Urumqi 830054China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China

Disaster information content is an objective mapping of disaster situations,social response,and public *** response to emergency is an important mechanism for implementing and guaranteeing emergency management of major natural hazard-related *** how disaster information content affects social response to emergencies is helpful for managing risk communication and efficient disaster *** on the 2008 freezing-rain and snowstorm disasters in southern China,this study used Python to extract 7,857 case-related media reports and applied natural language processing for text *** used three typical cases to identify and analyze disaster media report content and the relationship between these reports and the social response to the *** categories of disaster response-such as prewarning and forecasting,announcements by the authorities,and social mobilization-appeared in the disaster information in the media,along with disaster impact information,that is,real-time disaster *** response information and an appropriate amount of disaster impact information played important roles in prewarning,disaster relief,public opinion guidance,and social stability maintenance and can serve important functions in communicating with all stakeholders of emergency management,assisting or influencing emergency departments or individuals in decision making,and eliminating "information islands." Empathy caused the general public to become "disaster responders" through receiving *** and an excess of negative information may have a perverse amplification effect on public opinion and increase the unpredictability of the disaster situation and the risk of social crisis.

关键词： Emergency management Freezing-rain and snowstorm disasters Media reports on disasters Social response to emergencies China

Fabricating functionally graded Fe-Cr-Co permanent magnetic alloys via laser powder bed fusion

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Journal of Iron and Steel Research International 2024年第3期31卷 729-737页

作者： Ya-zhou He Ya-qing Hou Peng Shen Hao Zhang Dong zhou Hang su Central Iron and Steel Research Institute Co. Ltd.Beijing 100081China Material Digital R&D Center China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China

Laser powder bed fusion(LPBF)in-situ alloying technology offers the possibility to construct gradient materials with varied structures and *** graded Fe-Cr-Co permanent magnetic alloys were fabricated by LPBF and in-situ alloying mixed powders of Fe,Cr,and Co *** effects of different Fe,Cr and Co contents on the microstructure,magnetic properties and hardness of Fe-Cr-Co alloys prepared by LPBF were *** as-built Fe-Cr-Co alloys present a single body-centered-cubic phase and have a homogeneous distribution of *** mechanical properties and magnetic properties of the compositionally graded sample show a gradient *** the increase in Cr content,the Vickers hardness of the sample increases,and the saturation magnetization of the sample *** optimal magnetic properties in an isotropic state are given as coercivity HcB=21.65 kA/m,remanence Br=0.70 T and energy product(BH)_(max)=5.35 kJ/m^(3),which are comparable to or higher than the reported magnetic properties in an isotropic state prepared by traditional powder *** in-situ alloying technology has the potential to further explore Fe-Cr-Co magnetic materials,such as those consisting of multiple or more constituent elements,and to maximize the compositional flexibility of magnetic materials.

关键词： Fe-Cr-Co alloy Laser powder bed fusion In-situ alloying Functional material Magnetic property

Time-domain dynamic constitutive model suitable for mucky soil site seismic response

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 1-13页

作者： Dong Qing Chen su Jin Liguo zhou Zhenghua Li Xiaojun Architectural Engineering Institute Huaiyin Institute of TechnologyHuai’an 223600China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100020China Institute of Geophysics China Earthquake AdministrationBeijing 100089China College of Transportation Science and Engineering Nanjing Tech UniversityNanjing 211816China

Soil nonlinear behavior displays noticeable effects on the site seismic *** study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton *** integrating shear modulus and combining the dynamic skeleton curve and the damping degradation coefficient,the constitutive equation of the logarithmic dynamic skeleton can be obtained,which considers the damping effect in a soil dynamics *** on the finite difference method and the multi-transmitting boundary condition,a 1D site seismic response analysis program called Soilresp1D has been developed herein and used to analyze the time-domain seismic response in three types of *** the same time,this study also provides numerical simulation results based on the hyperbolic constitutive model and the equivalent linear *** results verify the rationality of the new soil dynamic constitutive *** can analyze the mucky soil site nonlinear seismic response,reflecting the deformation characteristics and damping effect of the silty *** hysteresis loop area is more extensive,and the residual strain is evident.

关键词： seismic response time-domain dynamic constitutive model logarithmic dynamic skeleton dampening effect mucky soil

基于全生命周期的广义源网荷储一体化的电力系统协调优化配置研究

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电网与清洁能源 2024年第8期40卷 74-84页

作者：苏舟钟鸣睿王喆李秉晨赵晓莉国网陕西省电力有限公司经济技术研究院中国能源建设集团陕西省电力设计院有限公司

随着新能源渗透率的提高电网各要素的耦合日益密切，传统规划方法无法实现“源网荷储”的一体化规划及应对规划过程中涌现的不确定性。在此背景下，采用全生命周期评估方法，基于广义源网荷储一体化进行电力系统优化配置。首先，建立了... 详细信息

随着新能源渗透率的提高电网各要素的耦合日益密切，传统规划方法无法实现“源网荷储”的一体化规划及应对规划过程中涌现的不确定性。在此背景下，采用全生命周期评估方法，基于广义源网荷储一体化进行电力系统优化配置。首先，建立了电力系统优化配置模型，主要包含能源系统结构及配置、储能模型、网架结构调整模型。其次，从优化策略的角度，基于全生命周期评估方法综合考虑双碳目标、可再生能源消纳责任指标、能源市场交易等方面对广义源网荷储一体化的碳排放进行评估。最后，利用某区域规划年目标网架构成的算例对所提模型进行验证。结果表明，本文所研究优化配置能够有效促进新能源消纳，降低系统投资成本。

关键词：全生命周期电力系统规划优化运行可再生能源碳排放

The variation of transition location in response to the variation of the amplitudes of initial disturbances

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Science China(Physics,Mechanics & Astronomy) 2010年第6期53卷 1109-1115页

作者： su CaiHong & zhou Heng Department of Mechanics,Tianjin University,Tianjin 300072,China Department of Mechanics Tianjin University Tianjin China

The transition location of a boundary layer depends on the amplitude and characteristic of initial disturbances. The larger the amplitude and the amplification rate of the initial disturbances are,the more upstream the transition location is. However,the environment surrounding the flying vehicle is variable,so the amplitude and characteristic of the disturbances triggered in the boundary layer through receptivity are also variable. In this paper,how the transition location varies in response to the variation of the initial disturbance amplitudes is studied by using direct numerical simulation. The results show that if the initial disturbance amplitudes become smaller,the transition location moves downstream correspondingly,but there is a time delay compared to the time of arrival of the disturbances with reduced amplitudes. Moreover,the speed of moving downstream is appreciably lower than the propagation speed of the disturbances. On the other hand,if the amplitudes of the initial disturbances recover their original value,the transition would immediately take place whenever the disturbances reach the former transition location,but the laminar flow between the new and old transition locations would not become turbulent immediately. Theoretical explanations are provided based on the transition mechanism found by our group.

关键词： transition boundary layer stability modification of mean flow direct numerical simulation

Experimental investigation of tubing collar's influence on hydrodynamic behavior of annular duct flow

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Petroleum Science 2022年第5期19卷 2326-2342页

作者： Yi-su zhou Zhong-Wei Huang Zhuang-Zhuang Zhang Tian-Wen Jiang Rui-Yue Yang Ming-He Zhang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum ChangpingBeijing 102249China China University of Petroleum(Beijing) ChangpingBeijing 102249China

Tubing collars’influence on hydrodynamic behavior of annular duct flow has been investigated using Particle Image Velocity(PIV)*** has become an efficient method for complex transient flows visualization.A water flow loop with two replaceable variable cross-sections(VCS),75-90 mm and 90-110 mm,in a 129 mm inner diameter(ID)pipe was *** whole field of the variable cross-section annulus(VCSA)was visualized,including forward-facing step(FFS),narrow annulus(NA),and backwardfacing step(BFS)*** VCSA ratio and Reynolds(Re)number influence on streamline distribution,velocity distribution,and turbulence intensity were *** showed that the recirculation is easier to form in BFS than FFS flow under the same *** VCSA ratio affects the formation of recirculation zones and the location of the reattachment *** number mainly affects BFS flow by influencing the main velocity component-axial *** turbulence intensity is relatively high in BFS than FFS flow and is larger at y/h>1.0 than y/h<***,the streamwise cohere nt structures reveal that the first two modes are predominant and represent the main characteristics of the flow by proper orthogonal decomposition(POD)method.

关键词： Variable cross-section annulus flow sudden contraction and expansion Hydrodynamic behavior PIV POD

逆向形变场的雅可比行列式在形变配准算法评估中的应用

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中华放射医学与防护杂志 2024年第2期44卷 133-139页

作者：黎恩廷郑万佳连锦兴朱伟婷周酥安雅琪黄思娟杨鑫中山大学附属第八医院放射科深圳518033 中国人民解放军南部战区空军医院肿瘤科广州510050 广州中医药大学第一附属医院放疗科广州510000 广州新华学院生物医学工程学院广州510520 中山大学肿瘤防治中心、华南肿瘤学国家重点实验室、肿瘤医学协同创新中心、广东省鼻咽癌诊治研究重点实验室广州510060

目的提出量化评估不同形变图像配准(DIR)算法的新指标,增加形变配准向临床实践进一步发展的可能。方法首先基于正向形变场(DVF)的雅可比行列式(JD)提出雅可比行列式均值(JDM),然后引入逆向DVF的JD,提出DVF雅可比行列式误差(DJDE)。在肺... 详细信息

目的提出量化评估不同形变图像配准(DIR)算法的新指标,增加形变配准向临床实践进一步发展的可能。方法首先基于正向形变场(DVF)的雅可比行列式(JD)提出雅可比行列式均值(JDM),然后引入逆向DVF的JD,提出DVF雅可比行列式误差(DJDE)。在肺癌和鼻咽癌图像上采用光流场形变配准算法(OF-DIR)和快速弹性正则化Demons形变配准算法(FD-DIR)进行配准。最后使用JDM和DJDE,以及雅可比行列式负值百分比(JDNP)、逆一致性误差(ICE)及归一化均方误差(NMSE)进行配准算法评估。对比不同评估指标在不同肿瘤图像以及不同算法上的差异,并采用受试者工作特征曲线(ROC)进行分析。结果在肺癌中,OF-DIR的JDM、NMSE、DJDE和ICE均优于FD-DIR,差异具有统计学意义(z=-2.24、-4.84;t=4.01、6.54,P0.05)。在肺癌及鼻咽癌中,OF-DIR的JDNP均差于FD-DIR,差异具有统计学意义(z=-4.29、-4.02,P<0.01)。此外,DJDE在ROC曲线上更具特异性及敏感性(AUC=0.77),针对不同部位肿瘤图像有不同表现结果。结论JDM及DJDE是评估形变算法的有效指标,肺癌及鼻咽癌均适合使用OF-DIR,而FD-DIR在使用时需注意器官组织动度对配准效果的影响。

关键词：雅可比行列式形变配准算法评估肺癌鼻咽癌形变场

Flexible, thermal processable, self-healing, and fully bio-based starch plastics by constructing dynamic imine network

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Green Energy & Environment 2024年第10期9卷 1610-1618页

作者： Xiaoqian Zhang Haishan Zhang Guowen zhou Zhiping su Xiaohui Wang State Key Laboratory of Pulp and Paper Engineering South China University of Technology

The serious environmental threat caused by petroleum-based plastics has spurred more researches in developing substitutes from renewable *** is desirable for fabricating bioplastic due to its abundance and renewable ***,limitations such as brittleness,hydrophilicity,and thermal properties restrict its widespread *** overcome these issues,covalent adaptable network was constructed to fabricate a fully bio-based starch plastic with multiple advantages via Schiff base *** strategy endowed starch plastic with excellent thermal processability,as evidenced by a low glass transition temperature （Tg=20.15℃）.Through introducing Priamine with long carbon chains,the starch plastic demonstrated superior flexibility （elongation at break=45.2%） and waterproof capability （water contact angle=109.2°）.Besides,it possessed a good thermal stability and self-adaptability,as well as solvent resistance and chemical *** work provides a promising method to fabricate fully bio-based plastics as alternative to petroleum-based plastics.

关键词： Bioplastic Covalent adaptable networks Schiff base chemistry Thermal processability Self-healing