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Oncology Research 2024年第4期32卷 691-702页

作者： JIJIE XIAO HONG XIAO YUJUN CAI jianwei liao JUE LIU LIN YAO SHAOLIN LI Department of Radiology The Fifth Affiliated Hospital of Sun Yat-Sen UniversityZhuhai510900China Department of Ultrasound The Third Affiliated Hospital of Sun Yat-Sen UniversityGuangzhou528405China PCFM Lab of Ministry of Education School of Materials Science and EngineeringGuangzhou510275China

Osteosarcoma is a malignant tumor originating from bone tissue that progresses rapidly and has a poor patient *** has shown great potential in the treatment of ***,the immunosuppressive microenvironment severely limits the efficacy of osteosarcoma *** dual pH-sensitive nanocarrier has emerged as an effective antitumor drug delivery system that can selectively release drugs into the acidic tumor ***,we prepared a dual pH-sensitive nanocarrier,loaded with the photosensitizer Chlorin e6(Ce6)and CD47 monoclonal antibodies(aCD47),to deliver synergistic photodynamic and immunotherapy of *** laser irradiation,Ce6 can generate reactive oxygen species(ROS)to kill cancer cells directly and induces immunogenic tumor cell death(ICD),which further facilitates the dendritic cell maturation induced by blockade of CD47 by ***,both calreticulin released during ICD and CD47 blockade can accelerate phagocytosis of tumor cells by macrophages,promote antigen presentation,and eventually induce T lymphocyte-mediated antitumor ***,the dual pH-sensitive nanodrug loaded with Ce6 and aCD47 showed excellent immune-activating and anti-tumor effects in osteosarcoma,which may lay the theoretical foundation for a novel combination model of osteosarcoma treatment.

关键词： Immunotherapy Osteosarcoma Nanodrug Photodynamic therapy CD47

TP53-specific mutations serve as a potential biomarker for homologous recombination deficiency in breast cancer:a clinical next-generation sequencing study

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Precision Clinical Medicine 2024年第2期7卷 122-131页

作者： Yongsheng Huang Shuwei Ren Linxiaoxiao Ding Yuanling jiang Jiahuan Luo Jinghua Huang Xinke Yin Jianli Zhao Sha Fu jianwei liao Cellular&Molecular Diagnostics Center Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Department of Clinical Laboratory The Sixth Affliated HospitalSun Yat-sen UniversityGuangzhou 510655China Breast Tumor Center Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Guangzhou Regenerative Medicine and Health Guangdong LaboratorySun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China

Background:TP53 mutations and homologous recombination deficiency(HRD)occur frequently in breast ***,the characteristics of TP53 pathogenic mutations in breast cancer patients with/without HRD are not ***:Clinical next-generation sequencing(NGS)of both tumor and paired blood DNA from 119 breast cancer patients(BRCA-119 cohort)was performed with a 520-gene ***,tumor mutation burden(TMB),and genomic HRD scores were assessed from NGS *** data from 47 breast cancer patients in the HRD test cohort were analyzed for further ***:All TP53 pathogenic mutations in patients had somatic origin,which was associated with the protein expression of estrogen receptor and progestogen *** to patients without TP53 pathologic mutations,patients with TP53 pathologic mutations had higher levels of HRD scores and different genomic *** frequency of TP53 pathologic mutation was higher in the HRDhigh group(HRD score≥42)relative to that in the HRD-low group(HRD score<42).TP53 has different mutational characteristics between the HRD-low and HRD-high ***53-specific mutation subgroups had diverse genomic features and ***,TP53 pathogenic mutations predicted the HRD status of breast cancer patients with an area under the curve(AUC)of ***53-specific mutations,namely HRD-low mutation,HRD-high mutation,and HRD common mutation,predicted the HRD status of breast cancer patients with AUC values of 0.32,0.72,and 0.58,***,TP53 HRD-high mutation and HRD common mutation combinations showed the highest AUC values(0.80)in predicting HRD ***:TP53-specific mutation combinations predict the HRD status of patients,indicating that TP53 pathogenic mutations could serve as a potential biomarker for poly-ADP-ribose polymerase(PARP)inhibitors in breast cancer patients.

关键词： next-generation sequencing homologous recombination deficiency TP53 breast cancer

MNi_(4.8)Sn_(0.2)(M=La, Nd)-supported multi-walled carbon nanotube composites as hydrogen storage materials

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Chinese Science Bulletin 2007年第12期52卷 1616-1622页

作者： REN jianwei liao ShiJun LIU JunMin College of Chemistry South China University of Technology Guangzhou 510641 China

Two composites LaNi4.8Sn0.2/CNTs and NdNi4.8Sn0.2/CNTs were prepared by an impregnation-reduction method. Their hydrogen storage capacity could reach up to 2.96 wt% and 2.88 wt% respectively at room temperature and 1.0 MPa pressure. These values, which might result from the synergetic effect between the alloy nanoparticles and the pretreated CNTs, were three times higher than those of the unsupported MNi4.8Sn0.2 (M=La, Nd) alloys under the same conditions. XRD and TEM revealed that the alloy particles were uniformly dispersed on the CNTs and the average particle size was ca. 30 nm. The composites also showed good stability and the hydrogen storage capacity decreased by less than 6% after 100 adsorption-desorption cycles. Moreover, no noticeable change in crystalline structure was observed for the composites.

关键词：储氢材料碳纳米管稀土金属元素镍锡

Hydrogen storage of multiwalled carbon nanotubes coated with Pd-Ni nanoparticles under moderate conditions

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Chinese Science Bulletin 2006年第24期51卷 2959-2963页

作者： REN jianwei liao Shijun LIU Junmin College of Chemistry South China University of Technology Guangzhou 510641 China

A type of novel material with a high hy-drogen storage capacity was prepared by supporting PdNi18 alloy nanoparticles,which were synthesized by using a new colloid method,on the surface of pretreated multiwalled carbon nanotubes (MWCNTs). The average PdNi18 alloy particle sizes calculated from XRD patterns were ca. 3 nm,and the high dis-persion of these particles on MWCNTs was con-firmed by TEM image. Hydrogen storage perform-ance of the composite was investigated under mod-erate pressure (0.1―1.5 MPa) at room temperature,and a maximum storage capacity of ca. 2.3 wt% was achieved under 1.5 MPa at room temperature,which was much higher than that reported previously under the same conditions.

关键词：多壁碳纳米管纳米颗粒贮氢能力钯镍合金

集成磁共振成像技术评估COVID-19康复患者神经损伤

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中山大学学报（医学科学版） 2024年第1期45卷 114-120页

作者：谢青吴文浩廖健伟王国杰李绍林张亚琴中山大学附属第五医院放射科广东珠海519000

【目的】应用集成磁共振成像技术(SyMRI)评估COVID-19康复患者脑灰质微结构的改变。【方法】29例COVID-19康复患者分为重症患者组(SG=11例)和普通患者组(OG=18例),选取年龄、性别、体质指数(BMI)和教育年限相匹配的健康志愿者作为健康... 详细信息

【目的】应用集成磁共振成像技术(SyMRI)评估COVID-19康复患者脑灰质微结构的改变。【方法】29例COVID-19康复患者分为重症患者组(SG=11例)和普通患者组(OG=18例),选取年龄、性别、体质指数(BMI)和教育年限相匹配的健康志愿者作为健康对照组(HC=23例)。所有受试者均行SyMRI扫描,生成T1、T2定量图谱,利用自动解剖标记(AAL)模板将T1和T2图谱分割成90个感兴趣区(ROIs)。通过对ROI内的所有体素进行平均得到每个ROI的T1、T2弛豫值。分析比较三组间90个脑区的T1、T2值。【结果】HC相比,SG在双侧眶内额上回、双侧海马旁回、双侧豆状壳核、双侧颞中回、双侧颞下回、左侧眶部额上回、左侧眶部额下回、左侧直回、左侧前扣带与旁扣带脑回、右侧内侧和旁扣带脑回、左侧后扣带回、左侧缘上回的T2值显著升高(P<0.05);与OG相比,SG在左侧直回、左侧海马旁回、双侧颞中回、双侧颞下回的T2值显著升高(P<0.05)。与HC相比SG在双侧眶内额上回、左侧直回、左侧前扣带和旁扣带脑回、右侧后扣带回、左侧海马旁回、左侧舌回、左侧豆状壳核、左侧丘脑的T1值显著升高(P<0.05);与OG相比,SG在右侧后扣带回、右侧距状裂周围皮层、左侧豆状壳核的T1值显著升高(P<0.05)。【结论】COVID-19患者即使在康复后脑灰质微结构仍可能存在持续性或迟发性损伤,且损伤程度与病情严重程度相关;SyMRI可作为一项敏感的工具评估中枢神经系统(CNS)微结构损伤情况,有助于早期临床诊断。

关键词：合成磁共振成像技术新型冠状病毒感染康复期中枢神经系统神经损伤

Resource Search in Unstructured Peer-to-Peer System Based on Multiple-Tree Overlay Structure

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Wuhan University Journal of Natural Sciences 2007年第5期12卷 887-892页

作者： YU Jianqiao liao jianwei College of Computer and Information Science Southwest University Chongqing 400715 China

We propose a multiple-tree overlay structure for resource discovery in unstructured P2P systems. Peers that have similar interests or hold similar type of resources will be grouped into a tree-like cluster. We exploit the heterogeneity of peers in each cluster by connecting peers with more capacities closer to the root of the tree. The capacity of a peer can be defined in different ways （e.g. higher network bandwidth, larger disk space, more data items of a certain type etc.） according to different needs of users or applications.

关键词： unstructured P2P system tree-like cluster similar interest

TBM隧道连续皮带机辅助驱动方案经济性分析

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铁道建筑技术 2024年第8期 84-87页

作者：廖建炜冀国栋王灿林中铁十八局集团有限公司天津300222 中铁十八局集团市政工程有限公司天津300222

详细阐述TBM隧道连续皮带机滚筒转载式和磁力摩擦式辅助驱动的工作原理及驱动方式,并依托山西中部引黄工程输水隧洞,从设备采购成本、维修成本、综合成本等方面对两种辅助驱动的经济性进行对比分析。研究结果表明:磁力摩擦式辅助驱动可... 详细信息

详细阐述TBM隧道连续皮带机滚筒转载式和磁力摩擦式辅助驱动的工作原理及驱动方式,并依托山西中部引黄工程输水隧洞,从设备采购成本、维修成本、综合成本等方面对两种辅助驱动的经济性进行对比分析。研究结果表明:磁力摩擦式辅助驱动可避免渣料高位卸载转运对皮带造成的冲击,有助于降低皮带故障率,减少皮带维修时间及成本;采用磁力摩擦式辅助驱动在工程初期投入较高,但综合成本相对较低,对于早期资金较为充裕的工程而言,宜选择磁力摩擦式辅助驱动进行施工。

关键词： TBM隧道连续皮带机出渣辅助驱动磁力摩擦式滚筒转载式经济性对比

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集成MRI对腰椎间盘退行性病变的诊断价值

中国研究型医院 2024年第3期11卷 44-48页

作者：廖健伟梁晓玲李葳冯嘉欣刘金李绍林中山大学附属第五医院放射科珠海519000

目的探索集成MRI(SyMRI,合成磁共振成像MAGiC序列)技术在腰椎间盘退行性病变中的诊断价值。方法本研究为前瞻性研究。采用简单随机抽样法收集2020年3月—2022年5月接受腰椎MR检查的126例腰痛患者(共630个腰椎间盘),所有患者均行常规腰... 详细信息

目的探索集成MRI(SyMRI,合成磁共振成像MAGiC序列)技术在腰椎间盘退行性病变中的诊断价值。方法本研究为前瞻性研究。采用简单随机抽样法收集2020年3月—2022年5月接受腰椎MR检查的126例腰痛患者(共630个腰椎间盘),所有患者均行常规腰椎MR与MAGiC序列的数据采集。对所有腰椎间盘退变进行Pfirrmann分级,并分别对MAGiC序列测定的髓核纵向弛豫时间(T1值)、横向弛豫时间(T2值)和质子密度值(PD值)进行定量分析。采用Spearman分析评估MAGiC序列各定量值(T1、T2和PD值)与Pfirrmann各分级间的差异。采用Pearson相关性分析统计MAGiC序列各定量值与年龄、性别、BMI,以及功能障碍指数量表(ODI)、视觉模拟评分法(VAS)的相关性。采用ROC评估MAGiC序列各定量值对腰椎间盘退变的诊断效能。结果 Spearman分析结果显示,腰椎间盘髓核MAGiC序列(T1、T2和PD值)与Pfirrmann各分级具有显著相关性(r值分别为-0.493、-0.526、-0.556,P均<0.001),其中,T1值与PfirrmannⅠ~Ⅲ级呈显著负相关,T2值与PfirrmannⅠ~Ⅳ级呈显著负相关,PD值与PfirrmannⅠ~Ⅴ级呈显著负相关。Pearson相关性分析显示髓核的T1、T2、PD值均与年龄、腰痛相关评分量表(ODI、VAS)呈显著负相关(P均<0.05)。ROC曲线结果显示T1、T2、PD值定量诊断腰椎间盘退行性病变的AUC值分别为0.764、0.779和0.780。结论 SyMRI技术对腰椎间盘退行性病变的诊断效能较好,有望成为临床诊断和预测该病的影像标志物。

关键词：腰椎腰痛磁共振成像腰椎间盘退变

Transient AC Overvoltage Suppression Orientated Reactive Power Control of the Wind Turbine in the LCC-HVDC Sending Grid

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CES Transactions on Electrical Machines and Systems 2024年第2期8卷 152-161页

作者： Bo Pang Xiao Jin Quanwang Zhang Yi Tang Kai liao jianwei Yang Zhengyou He IEEE College of Electrical Engineering Southwest Jiaotong UniversityChengdu 610031China State Grid Zhejiang Electric Power Company HangzhouChina

High-voltage direct current(HVDC) transmission is a crucial way to solve the reverse distribution of clean energy and loads. The line commutated converter-based HVDC(LCCHVDC) has become a vital structure for HVDC due to its high technological maturity and economic advantages. During the DC fault of LCC-HVDC, such as commutation failure, the reactive power regulation of the AC grid always lags the DC control process, causing overvoltage in the AC sending grid, which brings off-grid risk to the wind power generation based on power electronic devices. Nevertheless, considering that wind turbine generators have fast and flexible reactive power control capability, optimizing the reactive power control of wind turbines to participate in the transient overvoltage suppression of the sending grid not only improves the operational safety at the equipment level but also enhances the voltage stability of the system. This paper firstly analyses the impact of wind turbine's reactive power on AC transient overvoltage. Then, it proposes an improved voltage-reactive power control strategy, which contains a reactive power control delay compensation and a power command optimization based on the voltage time series prediction. The delay compensation is used to reduce the contribution of the untimely reactive power of wind turbines on transient overvoltage, and the power command optimization enables wind turbines to have the ability to regulate transient overvoltage, leading to the variation of AC voltage, thus suppressing the transient overvoltage. Finally, the effectiveness and feasibility of the proposed method are verified in a ±800kV/5000MW LCC-HVDC sending grid model based on MATLAB/Simulink.

关键词： Commutation failure LCC-HVDC Transient overvoltage Wind power

Review of the Analysis and Suppression for High-frequency Oscillations of the Grid-connected Wind Power Generation System

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CES Transactions on Electrical Machines and Systems 2024年第2期8卷 127-142页

作者： Bo Pang Qi Si Pan Jiang Kai liao Xiaojuan Zhu jianwei Yang Zhengyou He the College of Electrical Engineering Southwest Jiaotong UniversityChengdu 610031China IEEE

High-frequency oscillation(HFO)of gridconnected wind power generation systems(WPGS)is one of the most critical issues in recent years that threaten the safe access of WPGS to the *** the WPGS can damp HFO is becoming more and more vital for the development of wind *** HFO phenomenon of wind turbines under different scenarios usually has different ***,engineers need to acquire the working mechanisms of the different HFO damping technologies and select the appropriate one to ensure the effective implementation of oscillation damping in practical *** paper introduces the general assumptions of WPGS when analyzing HFO,systematically summarizes the reasons for the occurrence of HFO in different scenarios,deeply analyses the key points and difficulties of HFO damping under different scenarios,and then compares the technical performances of various types of HFO suppression methods to provide adequate references for engineers in the application of ***,this paper discusses possible future research difficulties in the problem of HFO,as well as the possible future trends in the demand for HFO damping.

关键词： Damping method High-frequency oscillation Stability Wind power generation