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Sb及Sb-Bi合金在冷却过程中电阻率与结构的变化

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特种铸造及有色合金 2012年第10期32卷 949-953页

作者：贾燕田学雷吕婷山东大学材料液态结构演变与加工教育部重点实验室

通过DSC测试确定了Sb和Sb-Bi合金实现过冷的能力,并且发现放热量随着Sb含量的增加而增加。电阻率的测量结果显示,在冷却过程中,Sb及Sb-Bi合金的电阻率都经历了几次突变,其中Sb及Sb90Bi10处于过冷态时电阻率出现回升现象,并且冷却过程中... 详细信息

通过DSC测试确定了Sb和Sb-Bi合金实现过冷的能力,并且发现放热量随着Sb含量的增加而增加。电阻率的测量结果显示,在冷却过程中,Sb及Sb-Bi合金的电阻率都经历了几次突变,其中Sb及Sb90Bi10处于过冷态时电阻率出现回升现象,并且冷却过程中的温度突变与电阻率突变同时发生。经分析认为,放热量的不同是由于金属释放潜热的能力不同造成的;电阻率出现突变与Sb的斜方六面体结构中的Peierls畸变及原子团尺寸变化有关;温度突变与电阻率突变相对应说明凝固过程中的结构转变对电阻率有一定的影响。

关键词： Sb Sb-Bi合金 DSC 过冷电阻率 Peierls畸变

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微尺度连续介质法定义域分析

计算力学学报 2005年第2期22卷 189-192页

作者：田文超贾建援西安电子科技大学机电工程学院机电科学与技术研究所陕西西安710071

Hamaker假设作为微观连续介质的理论基础,在工程实践中得到广泛应用。根据Hamaker假设,利用微观连续介质法,计算了两个原子之间的吸引力,发现计算结果同经典的原子间吸引力不一致;通过分析相对误差发现,微观连续介质法仅适用在原子间距... 详细信息

Hamaker假设作为微观连续介质的理论基础,在工程实践中得到广泛应用。根据Hamaker假设,利用微观连续介质法,计算了两个原子之间的吸引力,发现计算结果同经典的原子间吸引力不一致;通过分析相对误差发现,微观连续介质法仅适用在原子间距较大的范围,并确定了微观连续介质法引力作用域为接触间隙大于7倍的原子半径。进一步分析斥力项,发现也存在同样现象;综合考虑引力和斥力时,在分析绝对误差和相对误差的基础上,得到微尺度连续介质法的作用域为大于10倍的原子半径的结论。

关键词： Hamaker假设微观连续介质法 AFM

Photoluminescence and Electroluminescence from Plasma Ploymerized Naphthalene Films

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Chinese Physics Letters 1996年第10期13卷 794-796页

作者： ZHANG Hai-feng MA Yu-guang tian Wen-jing SHEN jia-cong TANG jian-guo LIU Shi-yong Key Laboratory of Molecular Spectra and Structures Jilin UniversityChangchun 130023 National Labaratory of Integrated Optical Electronics Jilin UniversityChangchun 130023

A polymer thin film electroluminescence (EL) device has been prepared by using plasma polymerization technique. Its basic structure consists of an emitting layer of plasma polymerized naphthalene (PPN) which is sandwiched between two metal electrodes. A uniform blue emission is observed under 8-20 V. Some electrical and optical properties of the device are described. The possible explanations for the blue EL from PPN are discussed.

关键词： technique. sandwich polymerization

Influence of polymer residues on the double resonance process of bilayer graphene

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Influence of polymer residues on the double resonance proces...

类风湿关节炎合并色素沉着绒毛结节性滑膜炎1例及文献回顾

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Xin Gong Yuehui jia Pei Peng Zidong Wang Zhongzheng tian Yunyi Fu School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Institute of Microelectronics Peking University

PMMA is commonly used for graphene transfer and device processing,introducing a thin layer of polymer residues and causing electrical and thermal performance degradation of graphene *** this paper,we present a research of the impact of polymer residues on surface morphologies and electrical properties of bilayer graphene using Raman spectroscopy in combination with atomic force *** electronic structure of

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北京大学学报（医学版） 2020年第6期52卷 1135-1139页

作者：彭嘉婧刘田北京大学人民医院风湿免疫科北京100044

报道北京大学人民医院风湿免疫科诊治的1例类风湿关节炎(rheumatoid arthritis,RA)合并色素沉着绒毛结节性滑膜炎(pigmented villonodular synovitis,PVNS)的临床诊疗过程,并回顾国内外相关文献报道,对该病的诊断、治疗及预后进行综合分... 详细信息

报道北京大学人民医院风湿免疫科诊治的1例类风湿关节炎(rheumatoid arthritis,RA)合并色素沉着绒毛结节性滑膜炎(pigmented villonodular synovitis,PVNS)的临床诊疗过程,并回顾国内外相关文献报道,对该病的诊断、治疗及预后进行综合分析,总结疾病特点,提高对该病的认识,减少漏诊并促进及早诊断。本例患者为45岁女性,RA病史15年,未进行规律治疗,近3个月右膝关节肿痛加重,关节腔穿刺发现大量RA病情难以解释的血性关节液。膝关节磁共振(magnetic resonance imaging,MRI)提示T1及T2加权像均为低信号的含铁血黄素沉着。患者行膝关节镜检查,镜下表现及组织病理检查符合PVNS的诊断,给予患者切除增生滑膜。术后给予患者积极的功能锻炼及慢作用抗风湿药物规范治疗,随访半年恢复良好,右膝关节未再出现肿胀。RA是以慢性滑膜炎和关节破坏为特征的自身免疫疾病,PVNS是一种以滑膜增殖为特征的侵蚀性关节疾病,二者均为滑膜受累,且临床表现相似,RA合并PVNS的病例罕见,明确诊断具有难度。本研究分别在万方数据知识服务平台和中国知网以“类风湿关节炎”和“色素沉着绒毛结节性滑膜炎”为检索词检索相关文献,未检索到中文文献。在PubMed中以“rheumatoid arthritis”与“pigmented villonodular synovitis”为检索词检索,共检索到2篇英文文献。对于该病,临床医生需充分了解患者的病程发展,通过MRI及组织病理检查做出正确诊断,并进行有针对性地治疗。

关键词：色素沉着绒毛结节性滑膜炎类风湿关节炎滑液关节积血

冲击载荷下线性硬化材料中球面应力波场的理论计算方法研究

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物理学报 2022年第1期71卷 303-311页

作者：王智环贾雷明何增田宙清华大学工程物理系北京100084 西北核技术研究所西安710024

基于线性硬化塑性本构模型,建立了冲击载荷作用下弹塑性球面应力波场的理论求解方法.首先,分析了冲击载荷卸载速率对球面应力波传播的影响,得到了3种不同类型的应力波传播图像.在此基础上,建立了弹性阶段、塑性加载阶段以及卸载阶段球... 详细信息

基于线性硬化塑性本构模型,建立了冲击载荷作用下弹塑性球面应力波场的理论求解方法.首先,分析了冲击载荷卸载速率对球面应力波传播的影响,得到了3种不同类型的应力波传播图像.在此基础上,建立了弹性阶段、塑性加载阶段以及卸载阶段球面波动方程的理论求解方法,给出了质点位移、质点速度、应力和应变等物理量的计算方案.与已有理论方法相比,该方法考虑了不同载荷卸载速率条件下应力波的不同传播情况,并且给出了卸载阶段应力波参量计算方法,具有更广的适用范围.利用上述方法计算了恒定冲击载荷和不同指数衰减冲击载荷作用下弹塑性球面应力波场参量,在弹性阶段和塑性加载阶段,理论计算得到的物理量与已有理论方法和数值模拟结果基本吻合,在卸载阶段,已有理论方法不再适用,而本文理论计算得到的物理量与数值模拟结果基本吻合,验证了该理论方法的正确性.

关键词：弹塑性球面应力波线性硬化模型卸载速率

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Co-infection of HIV and parasites in China: Results from an epidemiological survey in rural areas of Fuyang city, Anhui province, China

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Frontiers of Medicine 2010年第2期4卷 192-198页

作者： Li-Guang tian tian-Ping WANG jia-Xu CHEN Yu-Chun CAI Xiao-Mei YIN Guo-Jin CHENG Wei-Duo WU Peter STEINMANN jian GUO Xiao-Mei TONG Lan-Hua LI Qin LIU Li ZHOU Feng-Feng WANG Zhen-Li WANG Xiao-Nong ZHOU National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionWHO Collaborating Center for MalariaSchistosomiasis and FilariasisShanghai 200025China Anhui Institute of Parasitic Disease Control Wuhu 241000China Fuyang Center for Disease Control and Prevention Fuyang 236000China Department of Epidemiology and Public Health Swiss Tropical and Public Health InstituteBasel CH-4000Switzerland University of Basel Basel CH-4000Switzerland Weifang Medical University Weifang 261000China

The aim of this study was to investigate epidemiological characteristics of co-infection of HIV and intestinal parasites in a HIV/AIDS highly endemic area in China.A cross-sectional survey was carried out in two villages where HIV/AIDS prevalence in residents was over 1%.Stool samples of all residents in the two targeted villages were examined for the presence of intestinal *** examination was performed for the HIV infection detection and anemia test.A questionnaire survey was carried out in all residents participating in the study.A total of 769 individuals were enrolled in the investigation,720 of whom were involved in stool examination of intestinal *** infection rates of parasites in the residents of the targeted villages were as follows:0.56%for Ascaris lumbricoides,4.03%for Hookworm,0.28%for Trichuris trichiura,0.42%for Clonorchis sinensis,21.39%for Blastocystis hominis,3.89%for Giardia lamblia,1.67%for Entamoeba spp.,4.44%for Cryptosporidium spp.,and no infection for Strongyloides *** overall infection rate of intestinal worms was 4.72%,intestinal parasite infection rate was 24.31%,the anemia prevalence rate was 34.68%,the co-infection rate of HIV and intestinal helminthes 2.17%,the co-infection rate of HIV and intestinal protozoa 28.26%,of which the co-infection rates of HIV and Blastocystis hominis,and HIV and Cryptosporidium *** 19.57%and 13.04%,respectively.A signiﬁcant difference of Cryptosporidium *** rate was found between HIV-positive group(13.04%)and HIV-negative group(4.70%)(P50%)and women(>39%).It was concluded that the infection rate of intestinal protozoa in the residents was higher than that of intestinal helminthes in the local setting,and a same pattern appeared in the co-infection rate of HIV and *** interestingﬁnding is that the infection rate of Cryptosporidium *** the HIV-positiv

关键词： human immunodeﬁciency virus(HIV) acquired immunodeﬁciency syndrome(AIDS) co-infec-tion intestinal parasites helminthes protozoa China

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真空微镊子吸附力仿真计算

压电与声光 2005年第1期27卷 65-67页

作者：田文超贾建援西安电子科技大学机电工程学院陕西西安710071

建立了真空微镊子吸附物理模型,基于Hamaker3个假设及空隙修正理论,推导出被镊物体分别为球、抛物面体和六面体时微镊子和被镊物体间吸附力的数学模型,经仿真得出吸附力仿真结果,并得到微镊子同被镊物体的间隙为r/2时(r为原子半径),吸... 详细信息

建立了真空微镊子吸附物理模型,基于Hamaker3个假设及空隙修正理论,推导出被镊物体分别为球、抛物面体和六面体时微镊子和被镊物体间吸附力的数学模型,经仿真得出吸附力仿真结果,并得到微镊子同被镊物体的间隙为r/2时(r为原子半径),吸附力最大的结论,从而为微镊子结构设计和电路控制提供理论基础。

关键词：真空微镊子吸附力 Hamaker假设

“Three Methods and Three Points” regulates p38 mitogen-activated protein kinase in the dorsal horn of the spinal cord in a rat model of sciatic nerve injury

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Neural Regeneration Research 2016年第12期11卷 2018-2024页

作者： Xin Guo tian-yuan Yu Wong Steven Wen-duan jia Chi Ma Yan-hong Tao Chao Yang Tao-tao Lv Shuai Wu Meng-qian Lu jia-li Liu College of Acupuncture-Moxibustion and Tuina Beijing University of Chinese Medicine College of Taditional Chinese Medicine Beijing University of Chinese Medicine

Tuina is a traditional Chinese treatment for sensory disturbances caused by peripheral nerve injury and related diseases. Our previous studies showed that tuina regulates relevant regions and indices of the spinal dorsal horn using the Dian, Bo, and Rou method in Yinmen（BL37）, Yanglingquan（GB34）, and Weizhong（BL40）. Treatment prevents muscle atrophy, protects spinal cord neurons, and promotes sciatic nerve repair. The mechanisms of action of tuina for treating peripheral nerve injury remain poorly understood. This study established rat models of sciatic nerve injury using the crushing method. Rats received Chinese tuina in accordance with the principle of ＂Three Methods and Three Points,＂ once daily for 20 days. Tuina intervention reduced paw withdrawal latency and improved wet weight of the gastrocnemius muscle, as well as promoting morphological recovery of sciatic nerve fibers, Schwann cells, and axons. The protein expression levels of phospho-p38 mitogen-activated protein kinase, tumor necrosis factor-α, and interleukin-1β also decreased. These findings indicate that ＂Three Methods and Three Points＂ promoted morphological recovery and improved behavior of rats with peripheral nerve injury.

关键词： nerve regeneration tuina Three Methods and Three Points phospho-p38 mitogen-activated protein kinase sciatic nerve injury tumor necrosis factor-α interleukin-1β dorsal horn of the spinal cord neural regeneration