期刊文献+
共找到216篇文章
< 1 2 11 >
每页显示 20 50 100
新型关节韧带数字体查仪量化评估前交叉韧带部分损伤后的膝关节松弛度
1
作者 朱哲越 张晨 +4 位作者 葛莹 薛晗 李若尘 吴光伟 马瑞 《中国组织工程研究》 CAS 北大核心 2025年第27期5795-5801,共7页
背景:前交叉韧带部分损伤后膝关节松弛程度的量化测量对于及时诊断、后期治疗和康复非常重要。现缺乏应用关节韧带测量仪进行前交叉韧带部分损伤诊断的相关研究。目的:探讨新型关节韧带数字体查仪在前交叉韧带部分损伤中的诊断价值。方... 背景:前交叉韧带部分损伤后膝关节松弛程度的量化测量对于及时诊断、后期治疗和康复非常重要。现缺乏应用关节韧带测量仪进行前交叉韧带部分损伤诊断的相关研究。目的:探讨新型关节韧带数字体查仪在前交叉韧带部分损伤中的诊断价值。方法:纳入30名单侧前交叉韧带部分损伤患者及20名健康志愿者作为研究对象,应用国产新型关节韧带数字体查仪测量80,120,150 N三种负荷下每侧膝关节的胫骨向前位移值,比较前交叉韧带部分损伤组和对照组的胫骨向前位移值和双侧差异值,分析受试者工作特征曲线,计算曲线下面积,并确定新型关节韧带数字体查仪的诊断灵敏度及特异度。结果与结论:①前交叉韧带部分损伤组和对照组在年龄、性别、体质量指数和病程方面差异均无显著性意义(P>0.05);②前交叉韧带部分损伤组胫骨向前位移值的双侧差异值明显高于对照组(P<0.05),且前交叉韧带部分损伤组患侧的胫骨向前位移值明显高于健侧(P<0.05);③施加负荷在80 N时的诊断准确性最高(cutoff值=10.45 mm),曲线下面积为0.813(95%CI:0.708-0.919),敏感性和特异性分别为76.7%和70.0%;④提示新型关节韧带数字体查仪可以客观量化评估前交叉韧带部分损伤后的膝关节松弛度,可为怀疑前交叉韧带部分损伤的患者提供客观的诊断依据。 展开更多
关键词 前交叉韧带 前交叉韧带损伤 膝关节松弛 胫骨前移 数字化关节测量
下载PDF
Recombinant chitinase-3-like protein 1 alleviates learning and memory impairments via M2 microglia polarization in postoperative cognitive dysfunction mice
2
作者 Yujia Liu xue han +6 位作者 Yan Su Yiming Zhou Minhui Xu Jiyan Xu Zhengliang Ma Xiaoping Gu Tianjiao Xia 《Neural Regeneration Research》 SCIE CAS 2025年第9期2727-2736,共10页
Postoperative cognitive dysfunction is a seve re complication of the central nervous system that occurs after anesthesia and surgery,and has received attention for its high incidence and effect on the quality of life ... Postoperative cognitive dysfunction is a seve re complication of the central nervous system that occurs after anesthesia and surgery,and has received attention for its high incidence and effect on the quality of life of patients.To date,there are no viable treatment options for postoperative cognitive dysfunction.The identification of postoperative cognitive dysfunction hub genes could provide new research directions and therapeutic targets for future research.To identify the signaling mechanisms contributing to postoperative cognitive dysfunction,we first conducted Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses of the Gene Expression Omnibus GSE95426 dataset,which consists of mRNAs and long non-coding RNAs differentially expressed in mouse hippocampus3 days after tibial fracture.The dataset was enriched in genes associated with the biological process"regulation of immune cells,"of which Chill was identified as a hub gene.Therefore,we investigated the contribution of chitinase-3-like protein 1 protein expression changes to postoperative cognitive dysfunction in the mouse model of tibial fractu re surgery.Mice were intraperitoneally injected with vehicle or recombinant chitinase-3-like protein 124 hours post-surgery,and the injection groups were compared with untreated control mice for learning and memory capacities using the Y-maze and fear conditioning tests.In addition,protein expression levels of proinflammatory factors(interleukin-1βand inducible nitric oxide synthase),M2-type macrophage markers(CD206 and arginase-1),and cognition-related proteins(brain-derived neurotropic factor and phosphorylated NMDA receptor subunit NR2B)were measured in hippocampus by western blotting.Treatment with recombinant chitinase-3-like protein 1 prevented surgery-induced cognitive impairment,downregulated interleukin-1βand nducible nitric oxide synthase expression,and upregulated CD206,arginase-1,pNR2B,and brain-derived neurotropic factor expression compared with vehicle treatment.Intraperitoneal administration of the specific ERK inhibitor PD98059 diminished the effects of recombinant chitinase-3-like protein 1.Collectively,our findings suggest that recombinant chitinase-3-like protein 1 ameliorates surgery-induced cognitive decline by attenuating neuroinflammation via M2 microglial polarization in the hippocampus.Therefore,recombinant chitinase-3-like protein1 may have therapeutic potential fo r postoperative cognitive dysfunction. 展开更多
关键词 Chil1 hippocampus learning and memory M2 microglia NEUROINFLAMMATION postoperative cognitive dysfunction(POCD) recombinant CHI3L1
下载PDF
Effects of Shenqi Xiangyi granules in advanced gastric cancer chemotherapy
3
作者 Xiao-Jing Shi Yu Song +4 位作者 xue-xue Liang Ting Chen Huang-Yu Hao xue han Ya-Nan Chen 《World Journal of Gastrointestinal Oncology》 SCIE 2025年第1期169-175,共7页
BACKGROUND Owing to the absence of specific symptoms in early-stage gastric cancer,most patients are diagnosed at intermediate or advanced stages.As a result,treatment often shifts from surgery to other therapies,with... BACKGROUND Owing to the absence of specific symptoms in early-stage gastric cancer,most patients are diagnosed at intermediate or advanced stages.As a result,treatment often shifts from surgery to other therapies,with chemotherapy and targeted therapies being the primary options for advanced gastric cancer treatment.A total of 116 patients with advanced gastric cancer,admitted from January 2021 to December 2023,were selected and divided into two groups of 58 each using the random number table method.The control group received FOLFOX4 chemothe-rapy(oxaliplatin+calcium+folinate+5-fluorouracil)combined with intravenous sindilizumab.The observation group received the same treatment as the control group,supplemented by oral administration of Senqi Shiyiwei granules.Both groups underwent treatment cycles of 3 weeks,with a minimum of two cycles.The therapeutic efficacy,immune mechanisms,and treatment-related toxicity and side effects were compared between the groups.The objective remission rate in the observation group(55.17%)was higher than that of the control group(36.21%)(P<0.05).After two treatment cycle,CD3+,CD4+,and CD4+/CD8+levels were higher in the observation group compared to the control group,while CD8+,regulatory T cells,and natural killer cells were lower(P<0.05).Additionally,the incidence of leukopenia,nausea,and vomiting was lower in observed group(P<0.05).No significant differences were observed in the incidence of other adverse reactions(P>0.05).CONCLUSION Adjuvant therapy with Shenqixian granules may enhance the efficacy of simudizumab combined with FOLFOX4 chemotherapy in advanced gastric cancer and the immune function by increasing immune cell counts,making it a valuable option in clinical treatment. 展开更多
关键词 Sindilizumab FOLFOX4 chemotherapy Advanced gastric cancer Ginseng Qi Xiangyi granule Clinic treatment
下载PDF
本科生综合实验:4-[二(4-甲基苯)氨基]苯甲醛合成与变色性能研究 被引量:1
4
作者 潘玉珍 薛寒 +2 位作者 高雅琳 胡舒蕊 张文珠 《色谱》 CAS CSCD 北大核心 2024年第3期304-309,共6页
针对有机合成实验缺少性质研究、仪器分析实验分析方法相对独立的问题,本项目基于机械致荧光变色材料在化学前沿领域的研究,设计了一个本科生综合实验。以4,4′-二甲基三苯胺为原料,通过Vilsmeier-Haack反应合成了4-[二(4-甲基苯)氨基]... 针对有机合成实验缺少性质研究、仪器分析实验分析方法相对独立的问题,本项目基于机械致荧光变色材料在化学前沿领域的研究,设计了一个本科生综合实验。以4,4′-二甲基三苯胺为原料,通过Vilsmeier-Haack反应合成了4-[二(4-甲基苯)氨基]苯甲醛,并通过质谱、红外吸收光谱和核磁共振波谱对其结构进行了表征;然后通过紫外-可见吸收光谱、荧光光谱等对其溶剂化变色和机械致荧光变色现象进行了研究,并通过X射线粉末衍射对其机械致荧光变色机理进行了探讨。本项目将有机合成与仪器分析实验相结合,形成合成及变色性能一体化研究,实验综合性强,现象有趣,是一个兼具趣味性、科学性和综合性的本科生创新实验。该实验可以很好地激发学生对化学研究的兴趣,锻炼多项实验操作能力,提升学生的综合科研素质。 展开更多
关键词 综合性实验 三苯胺类化合物 溶剂化变色 机械致荧光变色
下载PDF
Low CO content hydrogen production from oxidative steam reforming of ethanol over CuO-CeO_2 catalysts at low-temperature 被引量:1
5
作者 xue han Yunbo Yu +1 位作者 Hong He Jiaojiao Zhao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第6期861-868,共8页
CuO-CeO2 catalysts were prepared by a urea precipitation method for the oxidative steam reforming of ethanol at low-temperature.The catalytic performance was evaluated and the catalysts were characterized by inductive... CuO-CeO2 catalysts were prepared by a urea precipitation method for the oxidative steam reforming of ethanol at low-temperature.The catalytic performance was evaluated and the catalysts were characterized by inductively coupled plasma atomic emission spectroscopy,X-ray diffraction,temperature-programmed reduction,field emission scanning electron microscopy and thermo-gravimetric analysis.Over CuOCeO2 catalysts,H2 with low CO content was produced in the whole tested temperature range of 250–450 C.The non-noble metal catalyst 20CuCe showed higher H2production rate than 1%Rh/CeO2 catalyst at 300–400 C and the advantage was more obvious after 20 h testing at400 C.These results further confirmed that CuO-CeO2 catalysts may be suitable candidates for low temperature hydrogen production from ethanol. 展开更多
关键词 CuO-CeO2 catalyst hydrogen production oxidative steam reforming LOW-TEMPERATURE
下载PDF
Lp-PLA2 LP(a)ApoB/ApoA-1水平与急性脑梗死严重程度及预后的相关性分析
6
作者 薛涵 高静 +5 位作者 王冬静 赵雪 张艳利 刘莉 王利民 刘有为 《河北医学》 CAS 2024年第5期857-863,共7页
目的:探究脂蛋白相关磷脂酶A2(Lp-PLA2)、脂蛋白a[LP(a)]、载脂蛋白B(ApoB/)/载脂蛋白A-1(ApoA-1)的表达水平与急性脑梗死(ACI)的严重程度和预后的相关性。方法:选择我院2022年1月至2023年1月收治的ACI患者122例作为病例组,根据疾病严... 目的:探究脂蛋白相关磷脂酶A2(Lp-PLA2)、脂蛋白a[LP(a)]、载脂蛋白B(ApoB/)/载脂蛋白A-1(ApoA-1)的表达水平与急性脑梗死(ACI)的严重程度和预后的相关性。方法:选择我院2022年1月至2023年1月收治的ACI患者122例作为病例组,根据疾病严重程度分为轻度组(54例)、中度组(49例)、重度组(19例),另选择同期体检健康者作为对照组(97例)。根据预后效果分为预后良好组(88例)和预后不良组(34例)。比较病例组和对照组患者的基本资料和生化指标的差异性,分析Lp-PLA2、LP(a)、ApoB/ApoA-1的表达水平对患者病情严重程度和预后效果影响。结果:病例组患者年龄、吸烟史、高血压例数、收缩压、LDL-C、LP(a)、Lp-PLA2指标高于对照组(P<0.05),HDL-C指标低于对照组(P<0.05),多因素Logistic回归分析结果,年龄、吸烟史、高血压、收缩压、HDLC、LDLC、LPa、LpPLA2、ApoB/ApoA-1是影响ACI发生的独立危险因素(P<0.05)。重度组患者Lp-PLA2、LP(a)、ApoB/ApoA-1指标显著高于轻度组和中度组(P<0.05),中度组Lp-PLA2、LP(a)、ApoB/ApoA-1指标显著高于轻度组(P<0.05),Spearman相关性比较,Lp-PLA2、LP(a)、ApoB/ApoA-1指标与患者病情严重程度呈正相关(r=0.796、0.718、0.451,P<0.05)。预后良好组患者Lp-PLA2、LP(a)、ApoB/ApoA-1指标显著高于预后不良组(P<0.05),ROC曲线分析结果显示,联合预测AUC为0.987。结论:高龄、血压血脂异常、生活习惯较差者更易患ACI,而Lp-PLA2、ApoB/ApoA-1水平与ACI的严重程度和预后效果呈明显的相关性,通过检测可有效评估患者病情发展,具有较高临床价值。 展开更多
关键词 急性脑梗死 脂蛋白相关磷脂酶 脂蛋白A 载脂蛋白B/载脂蛋白A-1
下载PDF
口腔液在新型冠状病毒感染抗体流行病学调查中的应用评价
7
作者 张霁颖 李冬梅 +10 位作者 史倩萍 黄芳 王希峰 陈丽岩 谷岩 赵晓琳 刘晓颖 韩湘华 杨睿祺 薛涵 张建辉 《首都公共卫生》 2024年第1期17-21,共5页
目的 探索无创、安全、便捷的新型生物样本口腔液在新型冠状病毒感染(以下简称新冠病毒感染)血清流行病学调查中的应用价值。方法 从北京市大兴区随机抽样选取505名社区人员,同时采集血清和口腔液样本,血清样本新冠病毒IgG抗体检测采用... 目的 探索无创、安全、便捷的新型生物样本口腔液在新型冠状病毒感染(以下简称新冠病毒感染)血清流行病学调查中的应用价值。方法 从北京市大兴区随机抽样选取505名社区人员,同时采集血清和口腔液样本,血清样本新冠病毒IgG抗体检测采用国家药品监督管理局批准的商品化试剂盒;口腔液样本新冠病毒IgG抗体检测采用北京市疾病预防控制中心建立的口腔液新冠病毒IgG抗体磁微粒化学发光法;运用Spearman相关分析,比较两种样本的新冠病毒抗体检测结果。结果 以血清抗体检测结果为对照,口腔液检测新冠病毒抗体灵敏度为94.1%,特异度为92.9%,符合率为94.1%,阳性预测值为99.8%,阴性预测值为31.0%,约登指数为87.0%,相关系数为0.754(P<0.001)。结论 口腔液和血清检测新冠病毒抗体结果具有很好的符合性,并且其无创、安全、便捷,受试者依从性好,可用于开展大规模人群抗体水平调查和监测。 展开更多
关键词 新型冠状病毒 抗体检测 口腔液
下载PDF
Responses of food production systems to climate change:sensitivity and vulnerability
8
作者 Liyong Xie Yue Li +3 位作者 Fengkui Qian Hongliang Zhao xue han Erda Lin 《Chinese Journal of Population,Resources and Environment》 2014年第3期227-232,共6页
Climate warming has prolonged the optimization of crop-growing seasons,shortened actual growth periods,and changed crop-planting boundaries.It also has boosted crop yields in certain regions while compromising crop qu... Climate warming has prolonged the optimization of crop-growing seasons,shortened actual growth periods,and changed crop-planting boundaries.It also has boosted crop yields in certain regions while compromising crop quality and affected the occurrence of meteorological disasters and pest diseases damage,which has resulted in reduction in grain yield.Crop production systems will evidence more sensitivity to climate change in future;for example,with an increase of 1°C in temperature,the average growth period will be shortened by 17 days for winter wheat and 7-8 days for maize and rice.Of course regional differences will exist.Climate change will threaten crop yield stability and affect crop quality.Vulnerability will be addressed in regard to extreme climatic events,which include reducing exposure and improving adaptive capacity,because the exposure of rain-fed agriculture is greater than that of irrigated agriculture.Therefore,we propose three suggestions to reduce the vulnerability of crop production systems to climate change.First,strengthen the evaluation capacity construction of sensitivity,which includes(1)refining and improving all types of evaluation indicator systems and models;(2)innovating and developing evaluation methods and tools;and(3)combining field observation and case studies,so that(1)the impact of climate change and sensitivity can be assessed scientifically;(2)uncertainty in the study can be identified and reduced;and(3)improved understanding of climate systems and their changes,climate change impact,and sensitivity will be achieved.Second,strengthen adaptive capacity construction for crop production systems,which includes(1)rebuilding existing farmland infrastructure to improve meteorological disaster defences;(2)adjusting agriculture structure and adopting new crop varieties with enhanced resistance;(3)popularizing water-saving technology and dry farming technology;and(4)further researching interdisciplinary theories and methods.Third,strengthen function construction for natural and social systems,which includes(1)popularizing innovative technology;(2)progressing agricultural insurance;and(3)improving energy efficiency and increasing carbon sequestration and emission reduction ability to maintain a favorable ecological environment. 展开更多
关键词 CLIMATE change food production impact and adaptation sensitivity VULNERABILITY EXPOSURE RESILIENCE
下载PDF
腹腔镜切除妊娠期阑尾的疗效分析
9
作者 黄华 马绍斌 +6 位作者 袁洋 马玲 薛寒 马帅军 马晓宇 陈玄玄 张伟博 《中国内镜杂志》 2024年第9期71-77,共7页
目的 比较腹腔镜手术和开腹手术治疗妊娠期急性阑尾炎的优势和安全性。方法 回顾性分析2004年11月-2023年4月该院收治的22例早期妊娠、中期妊娠和晚期妊娠急性阑尾炎患者的临床资料。按不同手术方式分为腹腔镜组(n=9)和开腹组(n=13),比... 目的 比较腹腔镜手术和开腹手术治疗妊娠期急性阑尾炎的优势和安全性。方法 回顾性分析2004年11月-2023年4月该院收治的22例早期妊娠、中期妊娠和晚期妊娠急性阑尾炎患者的临床资料。按不同手术方式分为腹腔镜组(n=9)和开腹组(n=13),比较两组患者感染指标和胎儿结局影响指标等。结果 两组患者住院时间、术中出血量、引流管放置率、术后C反应蛋白、降钙素原、抗生素使用时间、切口感染率、腹腔感染率、保胎治疗时间、病理学表现、早产率、分娩方式和胎儿存活率比较,差异均无统计学意义(P> 0.05);腹腔镜组手术时间长于开腹组,术后镇痛剂使用时间、首次进食时间和肛门排气时间短于开腹组,术后白细胞计数低于开腹组,差异均有统计学意义(P <0.05),两组患者麻醉方式比较,差异有统计学意义(P <0.05)。结论 腹腔镜手术治疗妊娠期急性阑尾炎,安全可行,与开腹手术相比,具有切口小、切口美观、肠道功能恢复快、进食早、感染少、母胎结局好和胎儿安全性高等优点。 展开更多
关键词 腹腔镜 开腹 手术 妊娠期 急性阑尾炎
下载PDF
The Flipping-Free Full-Parallax Tabletop Integral Imaging with Enhanced Viewing Angle Based on Space-Multiplexed Voxel Screen and Compound Lens Array
10
作者 Peiren Wang Jinqiang Bi +3 位作者 Zilong Li xue han Zhengyang Li Xiaozheng Wang 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第9期3197-3211,共15页
Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medica... Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medical diagnosis.However,the traditional structural characteristics of integral imaging display inevitably introduce the flipping effect outside the effective viewing angle.Here,a full-parallax tabletop integral imaging display without the flipping effect based on space-multiplexed voxel screen and compound lens array is demonstrated,and two holographic functional screens with different parameters are optically designed and fabricated.To eliminate the flipping effect in the reconstruction process,the space-multiplexed voxel screen consisting of a projector array and the holographic functional screen is presented to constrain light beams passing through the corresponding lens.To greatly promote imaging quality within the viewing area,the aspherical structure of the compound lens is optimized to balance the aberrations.It cooperates with the holographic functional screen to modulate the light field spatial distribution.Compared with the simulation results,the distortion rate of the imaging display is reduced to less than 9%from more than 30%.In the experiment,the floating high-quality reconstructed three-dimensional image without the flipping effect can be observed with the correct 3D perception at 96°×96°viewing angle,where 44,100 viewpoints are employed. 展开更多
关键词 Integral imaging display flipping effect large viewing angle optimized compound lens imaging distortion
下载PDF
More than a Few LAB Alleviate Common Allergies: Impact of Paraprobiotics in Comparison to Probiotical Live Cells
11
作者 Nditange Shigwedha Lanwei Zhang +7 位作者 Liubov Sichel Li Jia Pimin Gong Wenli Liu Shumei Wang Shuang Zhang xue han Wei Gao 《Journal of Biosciences and Medicines》 2014年第3期56-64,共9页
The evidence in this paper indicates that the alarming increase of common allergies can be reduced by the intake of particular “probiotics” or “paraprobiotics” along with food. This appears to build a consensus in... The evidence in this paper indicates that the alarming increase of common allergies can be reduced by the intake of particular “probiotics” or “paraprobiotics” along with food. This appears to build a consensus in the pharmaceutical and food communities about the role of probiotics in the prevention and treatments of common allergies. Food allergy is one of the common allergies, defined as an adverse health effect arising from a specific immune response that occurs reproducibly on exposure to a given food. Improving the digestion of foods and maintaining a healthy gastrointestinal (GI) tract is certainly critical to controlling food allergens. Therefore, the association between a leaky gut or an impaired intestinal permeability and food-allergenic reactions is explained. Gluten has been found to be somehow a justification for protein allergy, and should, therefore, be avoided by people with celiac disease. In several, in vitro models, surface layer (S- layer) proteins of selective paraprobiotics have shown potential in alleviating food allergies and intestinal disorders. Notably, lactobacilli paraprobiotics have proven to be the immediate immunomodulators against common allergies and other diseases, including viral (flu, hepatitis C), bacterial (bronchitis), asthma, chronic fatigue, fibromyalgia, gastrointestinal distress, and autism disorders in humans. 展开更多
关键词 Paraprobiotics Food ALLERGY S-LAYER Proteins IMMUNOGLOBULIN E (IgE) Probiotical Cell Lysates LACTIC Acid Bacteria (LAB)
下载PDF
The potential mechanism of prevention and treatment of COVID-19 by shufeng jiedu capsule was studied based on network pharmacology
12
作者 Jing-Wen Huang Li-Feng An +4 位作者 xue han Qing-Wei Li Hui xue Liu Yang Jian-Fei Duan 《Journal of Hainan Medical University》 2020年第11期13-17,共5页
Objective: To investigate the mechanism of Shufeng Jiedu Capsule(SJC) for treatment of COVID-19 based on network pharmacology. Methods: Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform ... Objective: To investigate the mechanism of Shufeng Jiedu Capsule(SJC) for treatment of COVID-19 based on network pharmacology. Methods: Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) was used to obtain the active components and targets information of Polygoni Cuspidati Rhizoma Et Radix, Forsythiae Fructus, Istidis Radix, Radix Bupleuri, Herba Patriniae, Verbenae Herb, Phragmitis Rhizoma and licorice in SJC. The Genecards databases were used to obtain COVID-19 targets. The meridian tropisms of each herb in SJC were collected from ETCM Database.the proteins interations network were build by STRING database. The GO and KEGG pathways were analyzed by the computer R language. Results: SFC contains 8herbs, 176 compounds and the corresponding targets 237. 48 COVID-19 targets are treated by SJC. Such as IL-10, IL-6, PTGS1, PTGS2, GSK3B, STAT-1, IL-17 signaling pathway, HIF-1 signaling pathway, Toll-like receptor signaling pathway, T cell receptor signaling pathway and VEGF signaling pathway may be potential targets and signaling pathways for the prevention and treatment of COVID-19. Conclusion: The COVID-19 cantreatmented the potential targets and signaling pathways by the SJC, and play the role of antipyretic, anti-inflammatory, balance immunity, antiviral and so on. It will provide strong support for the later stage experiment and clinical application of SJC. 展开更多
关键词 Shufeng Jiedu Capsule Corona Virus Disease 2019(COVID-19) Network pharmacology TARGET Signaling pathway
下载PDF
天然气管廊导管辅助泄爆装置的研究
13
作者 郝永梅 薛寒 +3 位作者 周星 成俊平 庄孙歧 许宁 《工业安全与环保》 2024年第11期23-26,32,共5页
为解决天然气管廊发生爆炸后超压以及泄放后地表二次灾害问题,研发一种天然气管廊导管辅助泄爆装置。首先介绍天然气管廊结构特点,确定使用泄爆技术缓解内部超压;然后基于侧向泄爆和水封阻火原理,设计可以实现多级缓冲和无焰排放功能泄... 为解决天然气管廊发生爆炸后超压以及泄放后地表二次灾害问题,研发一种天然气管廊导管辅助泄爆装置。首先介绍天然气管廊结构特点,确定使用泄爆技术缓解内部超压;然后基于侧向泄爆和水封阻火原理,设计可以实现多级缓冲和无焰排放功能泄爆装置;最后通过有限元对比分析直接泄爆、侧向泄爆以及无泄爆口3种方式下天然气管廊受力情况。结果表明:侧向泄爆与无泄爆口受力分布范围较广,而直接泄爆应力集中于泄爆口附近,且应力值较大。因此,在实现泄压功能同时,侧向泄爆对天然气管廊结构保护远高于直接泄爆,从而体现泄爆装置结构设计的优势。 展开更多
关键词 天然气管廊 泄爆装置 侧向泄爆 水封阻火
下载PDF
基于分级药学监护构建病区医嘱前置审核平台的实践和效果分析
14
作者 童凌斐 陈海花 +1 位作者 薛涵 侯锦霞 《药品评价》 CAS 2024年第7期785-790,共6页
目的通过构建病区医嘱前置审核平台,协助专科临床药师在一级药学监护的基础上开展个性化医嘱审核,以提升合理用药精细化管理水平。方法专科临床药师从患者疾病特点、重点监控指标和药物相关因素制定分级药学监护计划。通过改造后的信息... 目的通过构建病区医嘱前置审核平台,协助专科临床药师在一级药学监护的基础上开展个性化医嘱审核,以提升合理用药精细化管理水平。方法专科临床药师从患者疾病特点、重点监控指标和药物相关因素制定分级药学监护计划。通过改造后的信息平台,选择实际进行一级药学监护的住院患者为干预对象,实施全医嘱前置审核,并对比分析平台实施前(2022年1—6月)与实施后(2023年1—6月)的住院医嘱干预效果和质量。结果实施后的医嘱干预成功率33.57%,对比实施前的12.86%,提升了20.71%,差异有统计学意义(P<0.05)。医嘱不合理问题数由实施前的36个降为实施后的9个,下降了75%,差异有统计学意义(P<0.05)。前置审核中双签通过率下降了34.29%,必须修改、双签复核及通过概率有所提升。同时,药师、医生沟通频率提升了31.43%,其中,面对面沟通频率提升35.71%。结论病区医嘱、前置审核该平台不仅优化了药师资源配置,提升了合理用药水平,并为临床药师的绩效考核提供参考,具有推广价值。 展开更多
关键词 分级药学监护 医嘱前置审核 合理用药
下载PDF
磁热双向耦合内置式电磁感应加热辊的设计与仿真
15
作者 王野平 李晓明 薛翰 《机械制造》 2024年第2期8-12,18,共6页
对磁热双向耦合内置式电磁感应加热辊进行设计与仿真分析,根据麦克斯韦方程和温度微分方程,分别建立电磁场和温度场数学模型,通过磁热双向耦合方式进行求解。利用有限元仿真软件设计正交试验,研究线圈与辊内壁间距、电流大小、电流频率... 对磁热双向耦合内置式电磁感应加热辊进行设计与仿真分析,根据麦克斯韦方程和温度微分方程,分别建立电磁场和温度场数学模型,通过磁热双向耦合方式进行求解。利用有限元仿真软件设计正交试验,研究线圈与辊内壁间距、电流大小、电流频率、线圈匝数对升温时间和温度均匀性的影响,并通过反向传播神经网络得到最佳参数组合。结果显示,线圈与辊内壁间距16mm、电流大小105A、电流频率11.7kHz、线圈匝数104为最佳参数组合,此时升温至平均温度250℃的时间为784s,温度均匀性为1.7527。 展开更多
关键词 磁热耦合 电磁感应 加热辊 设计 分析
下载PDF
基于倾向性评分匹配的ICU中心静脉导管相关血流感染危险因素
16
作者 滕支梅 朱尚 +2 位作者 薛寒 黄劲华 孔旭辉 《中国感染控制杂志》 CAS CSCD 北大核心 2024年第11期1405-1412,共8页
目的探讨中心静脉导管相关血流感染(CLABSI)的独立危险因素,为制定感染防控的干预措施和开展针对性治疗提供依据。方法回顾性收集2019年1月—2023年12月某院诊断为CLABSI的患者,将其定义为感染组,并采用倾向性评分匹配(PSM)法1∶4匹配... 目的探讨中心静脉导管相关血流感染(CLABSI)的独立危险因素,为制定感染防控的干预措施和开展针对性治疗提供依据。方法回顾性收集2019年1月—2023年12月某院诊断为CLABSI的患者,将其定义为感染组,并采用倾向性评分匹配(PSM)法1∶4匹配置入中心静脉导管(CVC)且未发生感染的患者为对照组。以是否发生CLABSI为因变量,将匹配后两组的可能危险因素为自变量进行logistic回归分析,探索患者发生CLABSI的独立危险因素。结果共匹配CLABSI组患者42例,非CLABSI组患者168例。多因素logistic回归分析显示,急性生理学及慢性健康状况(APACHEⅡ)评分高[OR=1.217,95%CI(1.094~1.357),P<0.001]、中心静脉置管时间长[OR=1.273,95%CI(1.157~1.400),P<0.001]及股静脉置管[OR=6.846,95%CI(1.511~31.014),P=0.013]是CLABSI发生的独立危险因素。42例CLABSI患者共分离病原菌118株,以革兰阴性菌为主(56株)。结论高APACHEⅡ评分、中心静脉置管时间长及股静脉置管是CLABSI发生的独立危险因素,主要病原菌为革兰阴性杆菌,针对这些危险因素严格落实CLABSI相应的防控措施,减少感染风险。 展开更多
关键词 中心静脉导管相关血流感染 中心静脉导管 倾向性评分匹配 危险因素 CLABSI
下载PDF
11 GHz不同室内场景的WBAN信道特性研究
17
作者 魏苏皖 杨丽花 +3 位作者 薛寒 马嘉文 杨钦 吕文俊 《南京邮电大学学报(自然科学版)》 北大核心 2024年第2期53-61,共9页
为了探索高频段室内无线体域网通信的可行性,对11 GHz室内无线体域网的传播特性进行了测量与研究。基于大量的测量数据,给出了11 GHz频段室内无线体域网的路径损耗、阴影效应与均方根时延扩展的统计特性。针对体对体通信时人体相对角度... 为了探索高频段室内无线体域网通信的可行性,对11 GHz室内无线体域网的传播特性进行了测量与研究。基于大量的测量数据,给出了11 GHz频段室内无线体域网的路径损耗、阴影效应与均方根时延扩展的统计特性。针对体对体通信时人体相对角度变化的场景,提出了一种具有相对角度影响的路径损耗模型,该模型利用了与身体角度相关的路径损耗指数、浮动截距以及身体角度因子修正相对角度变化引入的路径损耗。为了验证模型的适用性,对比分析了在小型空教室和大型会议室两种不同场景下相对角度变化对信道传播特性的影响。研究结果表明:在收发端距离固定的情况下,路径损耗指数、浮动截距和由相对角度引起的路径损耗(Path Loss caused by Relative Angle,PLRA)均与相对角度具有三角函数关系;在收发端相对角度固定时,PLRA与收发端距离无关,仅与相对角度有关。上述研究结果可以为11 GHz频段在未来室内无线体域网的使用提供理论基础与实践依据。 展开更多
关键词 高频段 体域网 室内场景 路径损耗 均方根时延 相对角度
下载PDF
动态环境下基于换电模式的电动车路径问题研究
18
作者 周妮 王文 +1 位作者 薛晗 陈琼 《集美大学学报(自然科学版)》 CAS 2024年第1期39-46,共8页
在实际配送中,考虑车速受不同天气、不同时段的影响,根据电动车辆行驶速度与能耗之间的函数关系,以电动车固定行驶成本、能耗成本、时间惩罚成本构成的总运输费用最小为目标,以车辆载重、车辆电池容量、客户时间窗、车辆速度为约束条件... 在实际配送中,考虑车速受不同天气、不同时段的影响,根据电动车辆行驶速度与能耗之间的函数关系,以电动车固定行驶成本、能耗成本、时间惩罚成本构成的总运输费用最小为目标,以车辆载重、车辆电池容量、客户时间窗、车辆速度为约束条件,构建动态环境下基于换电模式和时变速度的电动汽车路径优化模型。用遗传算法对模型求解,采用实数编码、轮盘赌选择算子、随机单点交叉、随机变异的方式,并以小变异率提高局部搜索能力,然后与车辆速度恒定时的几种情况进行对比。试验结果表明,所建立的优化模型更符合实际情况,能够根据客户属性和动态环境下的路网特性,合理安排发车、规划配送路径和顺序,从而降低配送成本,为物流企业运营车辆和优化配送提供参考。 展开更多
关键词 物流配送 时变速度 遗传算法 换电式电动车 路径问题 总运输费用
下载PDF
Porous framework materials for energy&environment relevant applications:A systematic review 被引量:2
19
作者 Yutao Liu Liyu Chen +16 位作者 Lifeng Yang Tianhao Lan Hui Wang Chenghong Hu xue han Qixing Liu Jianfa Chen Zeming Feng Xili Cui Qianrong Fang Hailong Wang Libo Li Yingwei Li Huabin Xing Sihai Yang Dan Zhao Jinping Li 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第2期217-310,共94页
Carbon peaking and carbon neutralization trigger a technical revolution in energy&environment related fields.Development of new technologies for green energy production and storage,industrial energy saving and eff... Carbon peaking and carbon neutralization trigger a technical revolution in energy&environment related fields.Development of new technologies for green energy production and storage,industrial energy saving and efficiency reinforcement,carbon capture,and pollutant gas treatment is in highly imperious demand.The emerging porous framework materials such as metal–organic frameworks(MOFs),covalent organic frameworks(COFs)and hydrogen-bonded organic frameworks(HOFs),owing to the permanent porosity,tremendous specific surface area,designable structure and customizable functionality,have shown great potential in major energy-consuming industrial processes,including sustainable energy gas catalytic conversion,energy-efficient industrial gas separation and storage.Herein,this manuscript presents a systematic review of porous framework materials for global and comprehensive energy&environment related applications,from a macroscopic and application perspective. 展开更多
关键词 Porous framework materials CATALYSIS SEPARATION Gas storage Carbon neutrality
下载PDF
A retrospective analysis of mature T-and NK-cell lymphomas 被引量:2
20
作者 Junlei Jia Xiaohui Wang +14 位作者 Zheng Song Shen Meng Yue Fei Jingwei Yu Xia Liu xue han Lanfang Li Lihua Qiu Zhengzi Qian Shiyong Zhou Wenchen Gong Bin Meng Xiubao Ren Xianhuo Wang Huilai Zhang 《Cancer Biology & Medicine》 SCIE CAS CSCD 2024年第3期223-229,共7页
Mature T-and natural killer(NK)-cell lymphomas are heterogeneous groups of malignant lymphoid neoplasms arising from T and NK cells. The incidence of mature T-and NK-cell lymphomas is 2.1 per 100,000 people, according... Mature T-and natural killer(NK)-cell lymphomas are heterogeneous groups of malignant lymphoid neoplasms arising from T and NK cells. The incidence of mature T-and NK-cell lymphomas is 2.1 per 100,000 people, according to a US report~1. 展开更多
关键词 LYMPHOMA NEOPLASMS KILLER
下载PDF
上一页 1 2 11 下一页 到第
使用帮助 返回顶部