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Journal of Rare Earths 2022年第6期40卷 924-929,I0003页

作者： jinhao zhu Guangfei Ding Lei Jin Zhehuan Jin Bo Zheng Shuai Guo Renjie Chen Aru Yan CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

In this study,we propose an approach of grain boundary modification that can significantly increase the coercivity of the B-lean Nd-Fe-B sintered magnets by intergranular addition of *** coercivity is substantially enhanced from 1.51 to 2.04 T through optimizing the microstructure and adjusting the phase composition for the grain boundary phase in the annealed *** matrix grains are covered by a continuous thin grain boundary phase accompanying the formation of intermetallic Nd_(6)Fe_(13)Ga *** analysis of magnetic behaviors above Curie temperature confirms that the grain boundary phase of annealed Nd-Ga doped magnets appears to be non-ferromagnetic,facilitating the intergrain exchange *** observation in grain boundary area indicates that some surface of the matrix grain is dissolved in the formation process of the Nd_(6)Fe_(13)Ga *** gives rise to a decrease in the proportion of matrix grains and saturation magnetization of the *** detailed relationship between magnetic properties and microstructure is discussed based on these results.

关键词： Nd-Fe-B sintered Magnet Magnetic properties Grain boundary Microstructures Rare earths

Effects of Pr-Cu-Ti intergranular addition on microstructure and magnetic properties of heavy-rare-earth-free Nd-Fe-B sintered magnets

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Journal of Rare Earths 2022年第5期40卷 778-783,I0004页

作者： jinhao zhu Guangfei Ding Bo Zheng Haichen Wu Lei Jin Zhehuan Jin Shuai Guo Renjie Chen Aru Yan CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

By intergranular addition of Pr-Cu-Ti alloy powders in the Nd-Fe-B sintered magnets with the normal B component,we propose an approach to the optimization of grain boundary and local Nd-Fe-B composition *** coercivity is enhanced from 1.42 to 1.86 T,while further addition leads to a reduction in remanence and *** analyses of phase composition reveal that Ti mainly exists in the form of metallic Ti alloy,and part of Ti combines with B to form the TiB2 phase after the liquid phase sintering *** process results in a consumption of B in the local Nd-Fe-B composition system and a change of the grain boundary component,which contributes to the formation process of the RE_(6)(Fe,M)_(14) phase after the annealing ***,with the modification of grain boundary and composition system,the intergranular addition of Pr-Cu-Ti induces the generation of continuous thin grain boundary *** promotes the intergrain exchange decoupling,increasing the coercivity in the annealed *** the excess addition results in the segregation of TiB_(2),as well as the precipitation of TiB_(2) into the Nd-Fe-B phase,which leads to structural ***,the further effort for the addition alloy with Ti to reduce the deterioration of the microstructure will lead to further improvement in magnetic properties.

关键词： Nd-Fe-B sintered magnet Magnetic properties Grain boundary Microstructures Rare earths

Influence of Pr-Al-Co alloy diffusion source on magnetic properties and microstructure of sintered Nd-Fe-B magnets processed by grain boundary diffusion

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Journal of Rare Earths 2022年第12期40卷 1885-1893,I0003页

作者： Lei Jin jinhao zhu Guangfei Ding Zhehuan Jin Bo Zheng Xuejing Cao Shuai Guo Renjie Chen Aru Yan Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technologyand EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

In this study,the influence of the content of Al and Co in the diffusion source on the magnetic performance and microstructure of the diffused magnet was studied by grain boundary diffusion treatment with Pr_(70)Al_(30-x)Co_(x)(x=0 at%,10 at%,15 at%,20 at%,30 at%)*** the Co content in the diffusion source increases from 0 at%to 10 at%,the coercivity enhancement in the Pr_(70)Al_(20)Co_(10)diffused magnet is the highest,increased from 1.62 to 2.24 T,higher than 2.01 T of the Pr_(70)Al_(30)diffused *** further increase of Co content in the diffused source,the coercivity of the diffused magnet decreases gradually,the coercivity of Pr_(70)Al_(15)Co_(15),Pr_(70)Al_(20)Co_(10)and Pr_(70)Co_(30)diffused magnet is 2.15,1.99 and1.81 T,*** analysis shows that plenty of continuous grain boundary phases(CGBPs)can be formed in the Pr_(70)Al_(20)Co_(10)diffused magnet under the synergistic effect of Al and Co,which leads to the enhancement of magnetic isolation between more adjacent ***,the amount of CGBP in the diffused magnets gradually decreases with the further increase of Co content in the diffusion source.

关键词： Nd-Fe-B Coercivity Pr-AI-Co alloys Grain boundary diffusion Rare earths

Phase evolution of(K,Na)NbO_3 powder prepared by high temperature mixing under hydrothermal conditions

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Particuology 2010年第5期8卷 477-481页

作者： Lin Bai Kongjun zhu jinhao Qiu Hongli Ji Likui Su The Aeronautical Key Laboratory for Smart Materials and Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

（Na, K）NbO3 （KNN） powders were successfully prepared by high temperature mixing method （HTMM） under hydrothermal conditions to study the effect of reaction time on the formation of KNN for three K＋/（K＋＋Na＋） ratios of 0.6, 0.7 and 0.8. The products were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, transmission electron microscopy （TEM） and selected area electron diffraction （SAED）, to show the change of phase and morphology of the as-prepared particles with the K＋/（K＋＋ Na＋） molar ratio in the solution. Pure Na-rich KNN monoclinic phase and pure K-rich KNN orthorhombic phase could be obtained quickly after mixing the solutions at high temperature when the K＋/（K＋＋Na＋） molar ratio was either 0.6 or 0.8. When the K＋/（K＋＋Na＋） molar ratio was 0.7, however, the K-rich KNN orthorhombic phase grain formed first, followed by the Na-rich KNN monoclinic phase grain, with the two phases coexisting in the final product.

关键词： (Na K)NbO3Hydrothermal conditionsHigh temperature mixing methodPhase evolution

基于术前MRI的盆底解剖参数对超低位直肠癌精准功能保肛手术时间的影响

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中华结直肠疾病电子杂志 2024年第3期13卷 209-216页

作者：吴浩凡刘元豪张锋敏张现中朱金浩黄嘉莹刘忠臣丁良福庄成乐同济大学医学院附属第十人民医院胃肠外科上海200072 同济大学医学院附属第十人民医院崇明分院胃肠外科上海202157

目的本研究旨在利用术前磁共振成像(MRI),全面评估超低位直肠癌患者的盆底解剖结构,并探究预测超低位直肠癌精准功能保肛手术(PPS)时间的最佳解剖参数和相应参考值.方法对2020年3月至2023年8月进行PPS的患者进行回顾性分析.所有患者均... 详细信息

目的本研究旨在利用术前磁共振成像(MRI),全面评估超低位直肠癌患者的盆底解剖结构,并探究预测超低位直肠癌精准功能保肛手术(PPS)时间的最佳解剖参数和相应参考值.方法对2020年3月至2023年8月进行PPS的患者进行回顾性分析.所有患者均于术前行MRI成像(T2加权成像),并进行盆腔解剖参数的测量和计算.采用线性回归分析手术时间的预测因素.根据盆腔解剖参数将患者分为两组,采用Mann-Whitney U检验,比较组间各人群特征差异.结果本研究共纳入136例超低位直肠癌患者.盆底肌深度(D)定义为两侧提肛肌与闭孔内肌接触位置连线的中点到两侧肛门直肠交界处连线的最短距离.多因素线性回归分析显示,高血压(标准回归系数=0.155,P=0.045)、淋巴结转移(标准回归系数=0.223,P=0.004)、盆底肌深度(标准回归系数=0.398,P<0.001)是手术时间的独立预测因素.基于Mann-Whitney U检验统计值的分析显示,D=25mm为最佳诊断截断值.与D<25 mm组的患者相比,D≥25 mm组的患者手术时间更长(240分钟vs.210分钟,P=0.005),既往腹部手术史比例更低(17.9%vs.34.5%;P=0.028),预防性造口比例呈增高趋势(25.6%vs.13.8%;P=0.091),但差异无统计学意义.除盆底解剖参数D外,两组间其他盆底解剖参数也存在显著差异.D 25 mm组患者的盆底解剖参数B更短(28 mm vs.23.5 mm;P=0.001),a、a'、β角度更大(50.4°vs.55.2°,P<0.001;47.5°vs.54.8°,P<0.001;48.9°vs.55°,P<0.001),但A、C等参数差异无统计学意义.结论盆底肌深度是评估超低位直肠癌精准功能保肛手术难度的有效术前预测因子.

关键词：直肠肿瘤超低位直肠癌磁共振成像盆底解剖经自然腔道取标本手术精准功能保肛术

Sensitive humidity sensor based on moisture-driven energy generation

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Nano Research 2024年第6期17卷 5578-5586页

作者： Qingchao Ni Qing Lou Chenglong Shen Guangsong Zheng Runwei Song Jingnan Hao Jialu Liu Jinyang zhu jinhao Zang Lin Dong Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials and School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

The emergence of novel self-powered humidity sensors has attracted considerable attention in the fields of smart electronic devices and personal ***,self-powered humidity sensors have been fabricated using a moisture-driven energy generation(MEG)device based on asymmetric tubular graphitic carbon nitride(g-CN)films prepared on anodized aluminum(AAO)*** a relative humidity(RH)of 96%,the MEG device can provide an open-circuit voltage of 0.47 V and a short-circuit current of 3.51μA,with a maximum output power of 0.08μ*** inherent self-powered ability and humidity response via current variation,an extraordinary response of 1.78×106%(41%-96%RH)can be gained from the MEG *** possible power generation mechanism is that g-CN/AAO heterostructure can form ion gradient and diffusion under the action of moisture to convert chemical potential into electrical potential,evoking a connaturally sensitive response to ***-powered respiration monitoring device based on the sensor is designed to monitor human movement(sitting,warming up,and running)and sleep status(normal,snoring,and apnea),maintaining excellent stability during cumulative 12-h respiration *** self-powered humidity sensing technology has promising potential for extensive integration into smart electronic and round-the-clock health monitoring devices.

关键词： graphitic carbon nitride moisture-driven energy generation humidity sensor respiration monitoring

Are dopamine agonists still the first-choice treatment for prolactinoma in the era of endoscopy? a systematic review and meta-analysis

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Are dopamine agonists still the first-choice treatment for p...

Multimodality management for chronic subdural hematoma in China: protocol and characteristics of an ambidirectional, nationwide, multicenter registry study

第十六届中国医师协会神经外科医师年会

作者： Xiangming Cai jinhao zhu Jin Yang Chao Tang Zhixiang Cong Chiyuan Ma School of Medicine Southeast University School of Medicine Nanjing Medical University School of Medicine Nanjing University

Objective:For prolactinoma patients,dopamine agonists(DAs) are indicated as the first-line treatment and surgery is an adjunctive ***,with the development of surgical technique and equipment,the effect of surgery has *** aim of this study was to assess the efficacy and safety of surgery versus DAs in patients with different types of ***:A systematic search of literature using Web of Science,PubMed,Cochrane Library,and Clinical Trial databases was conducted until July 12,*** patients treated with DAs(bromocriptine or cabergoline) or surgery(microscopic or endoscopic surgery) were *** included the biochemical cure rate,recurrence rate,prolactin level,improvement rates of symptoms,and incidence rates of complications.A random-effects model was used to pool the extracted *** comparisons were conducted instead of quantitative ***:DAs were better than surgery in terms of the biochemical cure rate(0.78 versus 0.66),but surgery had a much lower recurrence rate(0.19 versus 0.57).Full advantages were not demonstrated in improvement rates of symptoms and incidence rates of complications with both treatment *** microprolactinoma patients,the biochemical cure rate of endoscopic surgery was equal to the average cure rate of DAs(0.86 versus 0.86) and it surpassed the biochemical cure rate of bromocriptine(0.86 versus 0.76).In macroprolactinoma patients,endoscopic surgery was slightly higher than bromocriptine(0.66 versus 0.64) in terms of the biochemical cure ***:For patients with clear indications or contraindications for surgery,chossing surgery or DAs accordingly is ***,for patients with clinical equipoise,such as surgery,especially endoscopic surgery,in microprolactinoma and macroprolactinoma patients,we suggest that neurosurgeons and endocrinologists conduct high quality clinical trials to address the clinical equipoise quantitatively.

关键词： prolactinoma dopamine agonists bromocriptine cabergoline microscopic surgery endoscopic surgery

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中华神经外科杂志(英文) 2024年第2期10卷 1-10页

作者： Liu Tao Zhao Zhihao Huang jinhao zhu Xide Chen Weiliang Lin Kun Yu Yunhu Li Zhanying Fan Yibing Liu Mingqi Nie Meng Liu Xuanhui Gao Chuang Quan Wei Qian Yu Wu Chenrui Yuan Jiangyuan Wu Di Lv Chuanxiang Dong Shiying Mi Liang Tian Yu Tian Ye Zhang Jianning Jiang Rongcai Department of Neurosurgery Tianjin Medical University General Hospital Tianjin China Ministry of Education Tianjin Neurological Institute Key Laboratory of Post Neuro-injury Neuro-repair and Regeneration in Central Nervous System Tianjin Medical University General Hospital Tianjin China Department of Neurosurgery Linyi People’s Hospital Shandong China Department of Neurosurgery Haining People’s Hospital Zhejiang China Department of Neurosurgery Fujian Provincial Hospital Fujian China Department of Clinical Research Center for Neurological Disease the People’s Hospital of HongHuaGang District of ZunYi Guizhou China Department of Neurosurgery Kailuan General Hospital Hebei China Department of Neurosurgery Tianjin First Central Hospital Tianjin China Department of Neurosurgery The First Hospital of Jilin University Changchun China

Background Despite its prevalence, there is ongoing debate regarding the optimal management strategy for chronic subdural hematoma (CSDH), reflecting the variability in clinical presentation and treatment outcomes. This ambidirectional, nationwide, multicenter registry study aims to assess the efficacy and safety of multimodality treatment approaches for CSDH in the Chinese ***/design A multicenter cohort of CSDH patients from 59 participating hospitals in mainland China was enrolled in this study. The treatment modalities encompassed a range of options and baseline demographics, clinical characteristics, radiographic findings, and surgical techniques were documented. Clinical outcomes, including hematoma resolution, recurrence rates, neurological status, and complications, were assessed at regular intervals during treatment, 3 months, 6 months, 1 year, and 2 years *** Between March 2022 and August 2023, a comprehensive cohort comprising 2173 individuals who met the criterion was assembled across 59 participating clinical sites. Of those patients, 81.1% were male, exhibiting an average age of 70.12 ± 14.53 years. A historical record of trauma was documented in 48.0% of cases, while headache constituted the predominant clinical presentation in 58.1% of patients. The foremost surgical modality employed was the burr hole (61.3%), with conservative management accounting for 25.6% of cases. Notably, a favorable clinical prognosis was observed in 88.9% of CSDH patients at 3 months, and the recurrence rate was found to be 2.4%.Conclusion This registry study provides critical insights into the multimodality treatment of CSDH in China, offering a foundation for advancing clinical practices, optimizing patient management, and ultimately, improving the quality of life for individuals suffering from this challenging neurosurgical *** registration ChiCTR2200057179

关键词： Chronic subdural hematoma Multimodality therapy Outcome Recurrence

有限理性条件下多层次轨道交通客流拥堵传播机理研究

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铁道科学与工程学报 2024年第6期21卷 2206-2216页

作者：贾锦秀朱昌锋方劲皓王傑成琳娜何润田章超兰州交通大学交通运输学院甘肃兰州730070

多层次轨道交通系统通过融合不同制式轨道交通,实现了运输能力的灵活配置和互补,但也增加了客流拥堵传播的不确定性,极易出现客流拥堵的跨层级传播。在分析乘客出行有限理性选择行为的基础上,通过引入心理账户理论,建立了广义出行时间... 详细信息

多层次轨道交通系统通过融合不同制式轨道交通,实现了运输能力的灵活配置和互补,但也增加了客流拥堵传播的不确定性,极易出现客流拥堵的跨层级传播。在分析乘客出行有限理性选择行为的基础上,通过引入心理账户理论,建立了广义出行时间账户和拥堵程度账户,并利用改进的价值函数与决策权重函数,刻画了乘客出行路径的综合交易效用。通过考虑出行方式与出行路径双因素,建立了基于巢式Logit-心理账户-累积前景理论(Nested Logit-mental Accountingcumulative Prospect Theory, NL-MA-CPT)的乘客出行方式选择预测模型。在此基础上,通过引入改进的易感-感染-恢复(Upgraded Susceptible-infected-recovered, USIR)模型,提出了考虑乘客选择行为的多层次轨道交通客流拥堵传播模型,并刻画了有限理性条件下的传播速率和恢复速率。最后,以北京市多层次轨道交通为例,验证模型的有效性,并通过灵敏度分析,揭示相关关键因素对拥堵传播的影响机理。研究结果表明:多层次轨道交通网络客流拥堵传播具有显著的波动性和收敛性特征,而传播速率和恢复速率直接影响拥堵传播的强度及影响范围,且随着网络层数的增加,乘客出行选择决策的有限理性特征对拥堵传播的影响更加显著。本研究可为运营企业制定客流拥堵控制策略提供一定的理论参考依据。

关键词：多层次轨道交通客流拥堵传播有限理性累积前景理论心理账户理论 USIR模型

Quantification of Effects of Natural Geographical Factors and Land-scape Patterns on Non-point Source Pollution in Watershed Based on Geodetector:Burhatong River Basin,Northeast China as An Example

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Chinese Geographical Science 2022年第4期32卷 707-723页

作者： SHI jinhao JIN Ri zhu Weihong School of Geography and Ocean Sciences Yanbian UniversityHunchunChina Key Laboratory of Wetland Ecological Functions and Ecological Security HunchunChina

Changes in natural geographic features and landscape patterns directly influence the hydrology and non-point source pollution processes in the watershed;however,to slow down non-point source pollution,it is necessary to distinguish their *** the non-point source pollution process is interactional as a result of multiple factors,and the collinearity between multiple independent variables limits our ability of reason ***,taking the Burhatong River Basin,Northeast China as an example,the methods of hydrological simulation,geographic detectors,and redundancy analysis have been combined to determine the impact of natural geographic features and landscape patterns on non-point source pollution in the *** Soil&Water Assessment Tool(SWAT)has been adopted to simulate the spatial and temporal distribution characteristics of total nitrogen and total phosphorus in the *** results show that the proportions of agricultural land and forest area and the location-weighted landscape contrast index(LWLI)are the main indicators influencing the rivers total nitrogen and total *** interaction of these indicators with natural geographic features and landscape configuration indicators also significantly influences the changes in total nitrogen(TN)and total phosphorus(TP).Natural geographical features and landscape patterns have different comprehensive effects on non-point source pollution in the dry and wet *** and TP loads are affected mainly by the change in landscape pattern,especially in the wet *** the ecological restoration program has improved forest coverage,the purification effect of increased forest coverage on the water quality in the watershed may be offset by the negative impact of increased forest *** high concentration and complexity of farmland patches increase the risk of non-point source pollution spread to a certain extent.

关键词： Soil&Water Assessment Tool(SWAT)model Geodetector non-point source pollution impact factors redundancy ana-lysis