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Bioactive Materials 2021年第5期6卷 1318-1329页

作者： Minqi Wang Hanjun Li Yiqi Yang Kai Yuan Feng Zhou haibei liu Qinghui Zhou Shengbing Yang Tingting Tang Shanghai Key Laboratory of Orthopaedic Implants Department of Orthopaedic SurgeryShanghai Ninth People’s HospitalShanghai Jiao Tong UniversitySchool of MedicineShanghai200011China Shanghai Graphic Design Information Co.Ltd Shanghai200011China

Large bone defects face a high risk of pathogen exposure due to open wounds,which leads to high infection rates and delayed bone *** promote successful repair of infectious bone defects,fabrication of a scaffold with dual functions of osteo-induction and bacterial inhibition is *** study describes creation of an engineered progenitor cell line(C3H10T1/2)capable of doxycycline(DOX)-mediated release of bone morphogenetic protein-2(BMP2).Three-dimensional bioprinting technology enabled creation of scaffolds,comprising polycaprolactone/mesoporous bioactive glass/DOX and bioink,containing these engineered *** vivo and in vitro experiments confirmed that the scaffold could actively secrete BMP2 to significantly promote osteoblast differentiation and induce ectopic bone ***,the scaffold exhibited broad-spectrum antibacterial capacity,thereby ensuring the survival of embedded engineered cells when facing high risk of *** findings demonstrated the efficacy of this bioprinted scaffold to release BMP2 in a controlled manner and prevent the occurrence of infection;thus,showing its potential for repairing infectious bone defects.

关键词： 3D bioprinting Genetic engineering Bone repair Antibacterial activity Infectious bone defect

Superiority of sugammadex in preventing postoperative pulmonary complications

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Chinese Medical Journal 2023年第13期136卷 1551-1559页

作者： haibei liu Rong Luo Shuangjiao Cao Bixing Zheng Ling Ye Wensheng Zhang Department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan 610041China Translational Neuroscience Center Sichuan UniversityChengduSichuan 610041China Department of Pain West China Hospital of Sichuan UniversityChengduSichuan 610041China

Background:Postoperative pulmonary complications often lead to increased mortality and financial *** paralysis plays a critical role in postoperative pulmonary *** meta-analysis was performed to determine whether sugammadex overmatches neostigmine in reducing postoperative pulmonary ***:PubMed,Embase,Web of Science,Medline through Ovid,Cochrane Library,Wanfang,China National Knowledge Infrastructure,and Chinese BioMedical Literature Databases were searched from their inception to 24 June,*** effects models were used for all *** risk of bias tool was used to assess the quality of RCTs,while Newcastle Ottawa Quality Assessment Scale was used to assess for the quality of cohort ***:Seventeen studies were included in the *** data from cohort studies showed reversing neuromuscular blocking with sugammadex had less risk of compound postoperative pulmonary complications(relative risk[RR]:0.73;95%confidence interval[CI]:0.60-0.89;P=0.002;I^(2)=81%),pneumonia(RR:0.64;95%CI:0.48-0.86;I^(2)=42%)and respiratory failure(RR:0.48;95%CI:0.41-0.56;I^(2)=0%).However,pooled data from RCTs did not show any difference between the two groups in pneumonia(RR:0.58;95%CI:0.24-1.40;I^(2)=0%)and no respiratory failure was reported in the included *** difference was not found between sugammadex and neostigmine about atelectasis in pooled data from either RCTs(RR:0.85;95%CI:0.69-1.05;I^(2)=0%)or cohort studies(RR:1.01;95%CI:0.87-1.18;I^(2)=0%).Conclusion:The evidence of superiority of sugammadex was limited by the confounding factors in cohort studies and small scale of *** sugammadex precedes neostigmine in preventing pulmonary complications after surgery is still ***-designed RCTs with large scale are ***:PROSPERO(https://***/PROSPERO/);CRD 42020191575.

关键词： Sugammadex Neostigmine Pulmonary complications Pneumonia Paralysis

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中美房地产金融风险比较及我国的应对策略

上海金融 2009年第2期 66-68页

作者：刘海北浙江大学

近年来,伴随我国房地产市场的高速发展,金融特别是银行信贷在不断提供支撑的同时,其面临的风险也不断积聚。美国次贷危机的爆发,让我们有机会冷静审视当前我国房地产金融面临的风险和形势,通过对比,不难发现中美两国房地产金融风险有着... 详细信息

近年来,伴随我国房地产市场的高速发展,金融特别是银行信贷在不断提供支撑的同时,其面临的风险也不断积聚。美国次贷危机的爆发,让我们有机会冷静审视当前我国房地产金融面临的风险和形势,通过对比,不难发现中美两国房地产金融风险有着许多相似之处。借鉴美国的经验和教训,本文提出应对我国房地产金融风险的对策。

关键词：中国美国房地产金融风险策略

Physical-Rheological Properties and Performances of Rejuvenated(Styrene-Butadiene-Styrene)Asphalt with Polymerized-MDI and Aromatic Oil

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1633-1646页

作者： Ao Lu Ming Xiong Chen Chen Liangjiang Li haibei Tan Xiong Xu Hubei Regional Management Headquarters CCCC Asset Management Co.Ltd.Beijing101399China School of Civil Engineering and Architecture Wuhan Institute of TechnologyWuhan430073China Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures Wuhan Institute of TechnologyWuhan430073China

Traditional asphalt rejuvenators,like aromatic oil(AO),are known to be effective in improving the low-temperature properties and fatigue performances of aged SBS(styrene-butadiene-styrene)modified asphalt(SBSMA)binders and ***,these rejuvenators inevitably compromise their high-temperature properties and deformation resistances because they dilute asphalt binder but do not fix the damaged structures of aged *** this study,a highly-active chemical called polymerized 4,4-diphenylmethane diisocyanate(PMDI)was used to assist the traditional AO asphalt *** physical and rheological characteristics of rejuvenated SBSMA binders and the moisture-induced damage and rut deformation performances of corresponding mixtures were comparatively *** results showed that the increasing proportion of AO compromises the hightemperature property and hardness of aged SBSMA binder,and an appropriate amount of PMDI works to compensate such losses;3%rejuvenator at mass ratio of AO:PMDI=70:30 can have a rejuvenated SBSMA binder with a high-temperature performance similar to that of fresh binder,approximately at 71.4°C;the use of AO can help reduce the viscosity of PMDI rejuvenated SBSMA binder for improving its workability;PMDI can help improve the resistance of AO rejuvenated SBSMA binder to deformation,especially at elevated temperatures,through its chemical reactions with aged SBS;moisture induction can enhance the resistance to damage of rejuvenated mixtures containing AO/PMDI or only PMDI;and the rejuvenator with a mass ratio of AO:PMDI=70:30 can lead the rejuvenated mixture to meet the application requirement,with a rut depth of only 2.973 mm,although more PMDI can result in a higher resistance of rejuvenated mixtures to high-temperature deformation.

关键词： Aged SBS modified asphalt polymerized 4,4-diphenylmethane diisocyanate aromatic oil physical properties rheological properties mixture performance

基于深度信念网络的多品种水稻生物量无损检测

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农业机械学报 2019年第11期50卷 136-143页

作者：段凌凤潘井旭郭子龙刘海北覃建祥柯希鹏华中农业大学工学院武汉430070 华中农业大学作物遗传改良国家重点实验室武汉430070

提出了基于深度信念网络的多品种生殖生育期水稻生物量无损检测方法。对在正常生长及干旱胁迫两个不同环境下的483个水稻品种,分别于胁迫前、胁迫后和复水后3个时间点进行图像采集。利用HSL颜色空间固定阈值分割法分割图像,并对处理后... 详细信息

提出了基于深度信念网络的多品种生殖生育期水稻生物量无损检测方法。对在正常生长及干旱胁迫两个不同环境下的483个水稻品种,分别于胁迫前、胁迫后和复水后3个时间点进行图像采集。利用HSL颜色空间固定阈值分割法分割图像,并对处理后的图像进行特征提取,共提取57个特征值。对数据进行归一化处理后,构建基于深度信念网络的水稻生物量模型,根据决定系数R^2、平均相对误差(MAPE)及相对误差绝对值的标准差(SAPE)选择最优模型,并与逐步线性回归模型进行比较。结果表明,基于深度信念网络的生物量测量模型性能更优,R^2为0.9299,MAPE为11.19%,SAPE为18.36%。本研究提供了一种精度高且适用于多品种、不同生殖生育期、不同生长环境的水稻生物量无损检测模型,为水稻研究提供了新的测量工具。

关键词：水稻生物量深度信念网络多品种生殖生育期无损检测

Frequency Regulation of VSC-MTDC System with Offshore Wind Farms

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC)system with offshore wind farms enhances the frequency stability by compensating the power for a disturbed AC ***,it is difficult to reasonably allocate frequency-regulation resources due to a lack of coordination mechanisms between wind farms and the MTDC ***,it is difficult for the frequency control of the wind farms to manage changes in wind speed;and the risk of wind-turbine stalls is ***,based on the kinetic energy of wind turbines and the power margin of the converters,the frequency-regulation capability of wind turbines is evaluated,and a dynamic frequency-support scheme considering the real-time frequency-support capability of the wind turbines and system frequency evolution is proposed to improve the frequency-support performance.A power adaptation technique at variable wind speeds is developed;the active power in the frequency-support stage and restoration stage is switched according to the wind speed.A hierarchical zoning frequency-regulation scheme is designed to use the frequency-regulation resources of different links in the MTDC system with wind *** simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind-speed changes and avoids multiple frequency dips.

关键词： Wind generation voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC) frequency regulation cooperative control adaptive control variable wind speed

A Novel Design of a Pre-separation Panel Structure to Protect Against the Impact of an Explosion in an Aircraft Plenum Chamber

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Acta Mechanica Solida Sinica 2024年第1期37卷 166-180页

作者： Zongxing liu Xiang Yang Jun liu School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China COMAC Shanghai Aircraft Design and Research Institute Shanghai 201210China

To reduce the damage of the pressurizing panel structure of a fuselage caused by an explosion at the“least risk bomb location”in an aircraft structure,a new pre-separation panel structure was designed to resist blast ***,the dynamic strain response and morphology of impact damage of the new pre-separation panel were measured in an impact damage ***,the commercial software LS-DYNA was used to calculate the propagation of the blast shock wave,and the results were compared with empirical equations to verify the rationality of the numerical calculation ***,the fluid–structure coupling method was used to calculate the damage process of the pre-separation panel structure under the impact of an explosion wave and an impact *** calculated results were in good agreement with the test results,which showed the rationality of the calculation method and the *** residual strength of the damaged pre-separation panel was significantly higher than that of the original damaged *** results show that the new pre-separation panel structure is reasonable and has certain significance for guiding the design of plenum chambers with strong resistance to implosion for aircraft fuselages.

关键词： Pre-separation panel structure Explosive response Residual strength Aircraft plenum chamber Least risk bomb location

我国ChatGPT研究领域热点主题识别与演化路径分析

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图书馆学研究 2024年第3期 2-12,77页

作者：王海蓓潘辉中国人民公安大学侦查学院华南理工大学图书馆

文章采用信息计量法与内容分析法,运用VOSviewer可视化分析工具构建我国ChatGPT研究领域的科学知识图谱,全面剖析ChatGPT研究领域的研究特征、热点主题分布以及演化路径,并提出研究展望,为ChatGPT理论研究和应用发展提供学理依据及实践... 详细信息

文章采用信息计量法与内容分析法,运用VOSviewer可视化分析工具构建我国ChatGPT研究领域的科学知识图谱,全面剖析ChatGPT研究领域的研究特征、热点主题分布以及演化路径,并提出研究展望,为ChatGPT理论研究和应用发展提供学理依据及实践指导。研究结果表明,国内ChatGPT研究主要围绕AIGC、教育变革、学术研究、媒介传播、图书馆服务、风险与治理、信息资源管理服务以及数字中国发展8个热点主题开展,形成以ChatGPT为代表的涵盖社会发展变革、应用场景开发、风险问题研判、知识信息生产传播、赋能数字化转型5条路径的多主体发展问题研究路径。

关键词： ChatGPT 热点主题识别演化路径生成式人工智能 AIGC

Effectiveness and safety of acupuncture in treatment of pregnancyrelated symptoms:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第1期44卷 16-26页

作者： liu Tingting liu Tongou liu Mingfu School of Traditional Chinese Medicine Clinical Medicine Hubei University of Traditional Chinese MedicineWuhan 430000China First Clinical College of Hubei University of Traditional Chinese Medicine Wuhan 430000China Department of Acupuncture and Tuina Affiliated Hospital of Hubei University of Traditional Chinese MedicineHubei Provincial Hospital of Traditional Chinese MedicineWuhan 430000China

OBJECTIVE:To systematically evaluate the efficacy and safety of acupuncture(AM)in the treatment of pregnancyrelated symptoms such as acute vomiting during ***:We comprehensively searched the available literature up to November 2021,including Pub Med,Embase,Cochrane Library,Chinese Biomedical Literature Database,and China National Knowledge Infrastructure Database,for randomized controlled trials(RCTs)on AM for the treatment of severe vomiting,insomnia,pharyngeal and pelvic pain,mood abnormalities,and dyspepsia during ***:Sixteen RCTs with a cumulative sample size of 1178 cases were *** these,964 patients were included in the *** Meta-analysis results showed that AM was more efficient than Western medicine in treating discomfort during pregnancy[odds ratio(OR)=1.19,95%confidence interval(CI)(1.11,1.28),P<0.01].AM was better than the control group in improving the visual analog scale scores[standard mean difference(SMD)=0.62,95%CI(0.53,0.71),P<0.01].AM was superior to the control group in improving Numerical Rating Scale(NRS)symptom scores[OR=7.31,95%CI(3.36,15.94),P<0.01].There was no significant difference in adverse effects between the AM and sham-AM groups and the analgesic drug group[OR=0.70,95%CI(0.39,1.28),P=0.25],but the treatment and control groups had mild adverse effects with a low ***:AM is more effective than other treatments or pharmacotherapy alone in the treatment of pregnancy-related symptoms,and is relatively ***,the quality of the included trials was rather poor,and high-quality studies are required to confirm our findings.

关键词： acupuncture pregnancy nausea vomiting sleep initiation and maintenance disorders low back pain pelvic pain mood abnormalities Meta-analysis systematic review

Stochastic Unit Commitment with High-Penetration Offshore Wind Power Generation in Typhoon Scenarios

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 535-546页

作者： Yanqi liu Dundun liu Hongcai Zhang State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China University of Macao Zhuhai UM Science and Technology Research Institute ZhuhaiChina

To tackle the energy crisis and climate change,wind farms are being heavily invested in across the *** China's coastal areas,there are abundant wind resources and numerous offshore wind farms are being *** secure operation of these wind farms may suffer from typhoons,and researchers have studied power system operation and resilience enhancement in typhoon ***,the intricate movement of a typhoon makes it challenging to evaluate its spatial-temporal *** published papers only consider predefined typhoon trajectories neglecting *** address this challenge,this study proposes a stochastic unit commitment model that incorporates high-penetration offshore wind power generation in typhoon *** adopts a data-driven method to describe the uncertainties of typhoon trajectories and considers the realistic anti-typhoon mode in offshore wind farms.A two-stage stochastic unit commitment model is designed to enhance power system resilience in typhoon *** formulate the model into a mixed-integer linear programming problem and then solve it based on the computationally-efficient progressive hedging algorithm(PHA).Finally,numerical experiments validate the effectiveness of the proposed method.

关键词： Unit commitment two-stage stochastic programming offshore wind farm typhoon