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腹腔镜全子宫切除治疗子宫腺肌症的疗效观察

临床研究 2024年第9期32卷 34-37页

作者：张黎许会芳驻马店市第一人民医院妇产科河南驻马店463000

目的分析与讨论治疗子宫腺肌症(AM)中,腹腔镜全子宫切除治疗效果。方法选取2021年7月至2023年6月驻马店市第一人民医院治疗的86例AM患者作为对象,依照手术方式的不同分组,研究组(n=43)以腹腔镜全子宫切除术治疗,传统组(n=43)对患者实施... 详细信息

目的分析与讨论治疗子宫腺肌症(AM)中,腹腔镜全子宫切除治疗效果。方法选取2021年7月至2023年6月驻马店市第一人民医院治疗的86例AM患者作为对象,依照手术方式的不同分组,研究组(n=43)以腹腔镜全子宫切除术治疗,传统组(n=43)对患者实施传统开腹手术治疗,对比手术情况、生活质量[世界卫生组织生存质量测定量表简表(WHOQOL-BREF)]、性激素水平[促黄体生成激素(LH)、卵泡刺激素(FSH)、雌二醇(E_(2))]、并发症情况。结果研究组手术时间、住院时间、肛门排气时间短于传统组,术中出血量少于传统组,差异具有统计学意义(P0.05),治疗后研究组LH、FSH低于传统组,E_(2)高于传统组,差异具有统计学意义(P0.05),治疗后研究组WHOQOL-BREF评分高于传统组,差异具有统计学意义(P<0.05);研究组并发症发生率(4.65%)低于传统组(18.60%),差异具有统计学意义(P<0.05)。结论腹腔镜全子宫切除与传统开腹手术治疗对比,并发症发生率低,能改善患者机体性激素水平,提高了患者生活质量,并且住院时间短,值得应用。

关键词：子宫腺肌症腹腔镜全子宫切除并发症性激素传统开腹手术

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全球人工智能标准化进展及我国发展建议

世界科技研究与发展 2024年第4期46卷 524-535页

作者：秦铭浩徐慧芳中国科学院文献情报中心北京100190 中国科学院大学经济与管理学院信息资源管理系北京100190 大连理工大学经济管理学院大连116024

目前人工智能领域竞争十分激烈,全球主要大国均把发展人工智能提升到国家战略的高度,多个国家和国际标准组织积极部署推进人工智能标准化战略。本文在梳理美国、欧盟、英国以及中国近年来标准化战略的基础上,进一步对全球355项人工智能... 详细信息

目前人工智能领域竞争十分激烈,全球主要大国均把发展人工智能提升到国家战略的高度,多个国家和国际标准组织积极部署推进人工智能标准化战略。本文在梳理美国、欧盟、英国以及中国近年来标准化战略的基础上,进一步对全球355项人工智能标准的制定组织、主题覆盖情况、类型、范围以及领域分布进行分析。研究发现,全球人工智能标准化正迅速发展,各国依据自身技术发展水平,制定了独具特色的标准化战略;国际标准化组织在此过程中发挥着核心作用,而其他组织则在特定领域内产生关键影响;目前,标准化工作主要集中在确保技术系统的安全性、稳定性和数据治理规范性;大多数人工智能标准聚焦于水平领域,涵盖通用技术、伦理和安全性等基础问题。基于研究结论,为推动我国人工智能标准化工作,提出以下发展建议:完善中国人工智能法律制度;加强国际合作,积极制定人工智能领域国际标准;建立人工智能标准机构;明确国内人工智能标准化情况,巩固优势,补齐短板。

关键词：人工智能标准化国际战略标准分析

Two dimensional analytical model for a negative capacitance double gate tunnel field effect transistor with ferroelectric gate dielectric

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Journal of Semiconductors 2018年第10期39卷 39-45页

作者： huifang xu Institute of Electrical and Electronic Engineering Anhui Science and Technology University

Analytical models are presented for a negative capacitance double-gate tunnel field-effect transistor（NC DG TFET） with a ferroelectric gate dielectric in this paper. The model accurately calculates the channel potential profile by solving the Poisson equation with the Landau-Khalatnikov（LK） equation. Moreover, the effects of the channel mobile charges on the potential are also taken into account. We also analyze the dependences of the channel potential and the on-state current on the device parameters by changing the thickness of ferroelectric layer,ferroelectric material and also verify the simulation results accord with commercial TCAD. The results show that the device can obtain better characteristics when the thickness of the ferroelectric layer is larger as it can reduce the shortest tunneling length.

关键词： ferroelectric gate dielectric double-gate tunnel field-effect transistor analytical model

科学与艺术整合过程中深度学习对幼儿创造力提升的影响

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北京教育学院学报 2024年第2期38卷 82-88页

作者：徐慧芳陈晓芳北京教育学院学前教育学院北京100009

通过准实验研究,发现幼儿在实施了一学期的科学与艺术整合课程后,托兰斯创造力测验分数显著提高。幼儿在区域活动中深度学习方式的使用频率能显著预测幼儿的托兰斯创造力测验得分;而在科学与艺术整合课程中,集体活动中的深度学习方式使... 详细信息

通过准实验研究,发现幼儿在实施了一学期的科学与艺术整合课程后,托兰斯创造力测验分数显著提高。幼儿在区域活动中深度学习方式的使用频率能显著预测幼儿的托兰斯创造力测验得分;而在科学与艺术整合课程中,集体活动中的深度学习方式使用频率也能显著预测幼儿托兰斯创造力的得分。重复测量方差分析发现,无论是在集体活动还是区域活动中,实验组幼儿在后测中使用深度学习的频率显著高于前测,也显著高于控制组。幼儿通过深度学习在新旧知识之间建立广泛联系,并运用非良构知识创造性地解决非良构问题,运用高阶思维激发了创造力。

关键词：科学与艺术整合深度学习创造力高阶思维

Chinese emotional words in patients with major depressive disorder during a subliminal Stroop task An event-related potential study

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Neural Regeneration Research 2010年第16期5卷 1274-1280页

作者： Daxing Wu Shujing xu huifang Yin Medical Psychological Research Center Second Xiangya Hospital Central South University Changsha 410011 Hunan Province China

Patients with major depressive disorder （MDD） develop a negative cognitive bias, but how they respond to information in Chinese emotional words is unclear. Here we used a Stroop paradigm with subliminal Chinese emotional words to explore the event-related potential components of abnormal emotional processing Jn patients with MDD. The correct rate was similar in MDD and normal control groups, but MDD reaction time was longer than the normal controls, especially to the negative and neutral stimuli. In N270, repeated-measure analysis of variance demonstrated a significant main effect of the relation electrode and valence on peak amplitude and interactions between valence and electrode site. The peak amplitudes of the three kinds of words were different in the two groups （positive 〉 negative 〉 neutral）. The topography of the difference waves indicated that the difference distributed in the frontal and left parietal-temporal sites across the scalp. In N400, there was a significant main effect of the relation electrode and valence on peak amplitude, and the latency showed a main effect of the electrode and an interaction between electrode and group. The amplitudes induced by type of words were significantly different from each other in both groups （positive 〉 negative 〉 neutral）. The topography of the difference waves indicated that the effect of relation type was primarily at left and right frontal and central and left parietal-temporal regions. Both MDD patients and normal controls exhibited significant emotional Stroop effects during the processing of positive/negative Chinese emotional words. MDD patients showed interference in emotional stimuli in early cognitive processing that induced psychological resource intervention during late emotional information processing.

关键词： Stroop test subliminal stimulations event-related potentials depression Chinese emotional words

Two-dimensional analytical model of double-gate tunnel FETs with interface trapped charges including effects of channel mobile charge carriers

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Journal of Semiconductors 2017年第2期38卷 51-58页

作者： huifang xu Yuehua Dai Institute of Electrical and Electronic Engineering Anhui Science and Technology University Institute of Electronic and Information Engineering Anhui University

A two-dimensional analytical model of double-gate（DG） tunneling field-effect transistors（TFETs） with interface trapped charges is proposed in this paper. The influence of the channel mobile charges on the potential profile is also taken into account in order to improve the accuracy of the models. On the basis of potential profile,the electric field is derived and the expression for the drain current is obtained by integrating the BTBT generation rate. The model can be used to study the impact of interface trapped charges on the surface potential, the shortest tunneling length, the drain current and the threshold voltage for varying interface trapped charge densities, length of damaged region as well as the structural parameters of the DG TFET and can also be utilized to design the charge trapped memory devices based on TFET. The biggest advantage of this model is that it is more accurate,and in its expression there are no fitting parameters with small calculating amount. Very good agreements for both the potential, drain current and threshold voltage are observed between the model calculations and the simulated results.

关键词： double-gate tunnel field effect transistor(TFET) interface trapped charges analytical model

Cache-Enabled in Cooperative Cognitive Radio Networks for Transmission Performance

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Tsinghua Science and Technology 2020年第1期25卷 1-11页

作者： Jiachen Yang Chaofan Ma Jiabao Man huifang xu Gan Zheng Houbing Song School of Electrical and Information Engineering Tianjin UniversityTianjin 300000China Wolfson School of Mechanical Electrical and Manufacturing EngineeringLoughborough UniversityLoughboroughLE11 3TUUK Department of Electrical ComputerSoftwareand Systems EngineeringEmbry-Riddle Aeronautical UniversityDaytona BeachFL 32114USA.

The proliferation of mobile devices that support the acceleration of data services(especially smartphones)has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceeding the throughput of the backhaul. To improve spectrum utilization and increase mobile network traffic, in combination with content caching, we study the cooperation between primary and secondary networks via content caching. We consider that the secondary base station assists the primary user by pre-caching some popular primary ***, the secondary base station can obtain more licensed bandwidth to serve its own user. We mainly focus on the time delay from the backhaul link to the secondary base station. First, in terms of the content caching and the transmission strategies, we provide a cooperation scheme to maximize the secondary user’s effective data transmission rates under the constraint of the primary users target rate. Then, we investigate the impact of the caching allocation and prove that the formulated problem is a concave problem with regard to the caching capacity allocation for any given power allocation. Furthermore, we obtain the joint caching and power allocation by an effective bisection search algorithm. Finally, our results show that the content caching cooperation scheme can achieve significant performance gain for the primary and secondary systems over the traditional two-hop relay cooperation without caching.

关键词： cooperative cognitive radio network content caching power allocation

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食管鳞癌发病风险预测模型研究进展

中国肿瘤 2024年第2期33卷 140-146页

作者：冯晨曦耿庆超林鑫徐慧芳刘茵张韶凯张建功郑州大学公共卫生学院河南郑州450001 郑州大学附属肿瘤医院/河南省肿瘤医院河南省肿瘤防控工程研究中心河南省肿瘤预防国际联合实验室河南郑州450008

筛查与早诊早治是降低食管鳞癌(esophageal squamous cell carcinoma,ESCC)疾病负担的重要措施。但是由于我国庞大的人口基数,难以在有限的资源条件下对所有目标人群提供筛查。然而通过发病风险预测模型,可有效识别出ESCC的高危人群,使... 详细信息

筛查与早诊早治是降低食管鳞癌(esophageal squamous cell carcinoma,ESCC)疾病负担的重要措施。但是由于我国庞大的人口基数,难以在有限的资源条件下对所有目标人群提供筛查。然而通过发病风险预测模型,可有效识别出ESCC的高危人群,使其进行后续的内镜检查,有助于缩小筛查范围,实现ESCC的精准防控。因此,构建发病风险预测模型逐渐成为ESCC防控研究的重点之一。当前国内外关于ESCC发病风险预测模型的研究仍处于发展阶段。为全面探讨现有ESCC发病风险预测模型的特点,全文从研究设计、预测变量及评价指标等方面,对其现状进行综述,并在此基础上提出了今后研究可重点考虑的内容,以期为进一步开发和完善ESCC发病风险预测模型提供参考依据。

关键词：食管鳞癌内镜筛查预测模型风险分层

Transformation relationship among different magnetic minerals within loess-paleosol sediments of the Chinese Loess Plateau

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Science China Earth Sciences 2009年第3期52卷 313-322页

作者： XIE QiaoQin CHEN TianHu xu XiaoChun QING ChengSong xu huifang SUN YuBing JI JunFeng School of Natural Resources and Environment Hefei University of TechnologyHefei 230009China Department of Geology and Geophysics University of WisconsinMadison WI 53706USA Institute of Surficial Geochemistry State Key Laboratory of Mineral Deposits ResearchDepartment of Earth SciencesNanjing UniversityNanjing 210093China

The dominant magnetic minerals and carriers of magnetic signals within the Chinese Loess Plateau are magnetite, maghemite, hematite, and goethite. In this study, we investigated the provenance and evo- lution of magnetic minerals during loess pedogenesis, using X-ray diffraction (XRD) and optical and electron microscopy, including field emission scanning electron microscopy (FESEM) and high- resolution transmission electron microscopy (HRTEM). Our results reveal that single- and multiphase mineral assemblages among magnetic minerals in the loess-paleosol sequence have been formed. Partial oxidation of coarse eolian magnetite has occurred in the desert source area and the oxidation degree is enhanced after deposition of the dust upon the Chinese Loess Plateau. This mode of origin resulted in a microtexture consisting of an inner magnetite core surrounded by a hematite rim, and strongly affected the magnetic characteristics of the loess. Goethite coexists with hematite in the loess and paleosol, and nanometer-scale hematite is formed upon goethite rims via dehydration. Our study provides direct mineralogical evidence of the magnetic record and paleoclimatic implications of the loess–paleosol sequence of the Chinese Loess Plateau.

关键词： Chinese loess-paleosol sequence magnetic minerals phase relationships mineralogy