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Effect of contact- and sliding-mode electrification on nanoscale charge transfer for energy harvesting

Nano Research 2016年第12期9卷 3705-3713页

作者： yu sheng zhou shengming Li Simiao Niu Zhong Lin Wang School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA Department of Mechanical Engineering Tsinghua University Beijing 100084 China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China

The process of charge transfer based on triboelectrification （TE） and contact electrification （CE） has been recently utilized as the basis for a new and promising energy harvesting technology, i.e., triboelectric nanogenerators, as well as self- powered sensors and systems. The electrostatic charge transfer between two surfaces can occur in both the TE and the CE modes depending on the involvement of relative sliding friction. Does the sliding behavior in TE induce any fundamental difference in the charge transfer from the CE？ Few studies are available on this comparison because of the challenges in ruling out the effect of the contact area using traditional macro-scale characterization methods. This paper provides the first study on the fundamental differences in CE and TE at the nanoscale based on scanning probe microscopic methods. A quantitative comparison of the two processes at equivalent contact time and force is provided, and the results suggest that the charge transfer from TE is much faster than that from CE, but the saturation value of the transferred charge density is the same. The measured frictional energy dissipation of -11 eV when the tip scans over distance of I A sheds light on a potential mechanism： The friction may facilitate the charge transfer process via electronic excitation. These results provide fundamental guidance for the selection of materials and device structures to enable the TE or the CE in different applications; the CE mode is favorable for frequent moderate contact such as vibration energy harvesting and the TE mode is favorable for instant movement such as harvesting of energy from human walking.

关键词： energy harvesting contact electrification triboelectrification charge transfer electronic excitation scanning Kelvin probemicroscopy

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Development and progress on hydrogen metallurgy

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International Journal of Minerals,Metallurgy and Materials 2020年第6期27卷 713-723页

作者： Jue Tang Man-sheng Chu Feng Li Cong Feng Zheng-gen Liu yu-sheng zhou School of Ferrous Metallurgy Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

Hydrogen metallurgy is a technology that applies hydrogen instead of carbon as a reduction agent to reduce CO2 emission,and the use of hydrogen is beneficial to promoting the sustainable development of the steel *** metallurgy has numerous applications,such as H2reduction ironmaking in Japan,ULCORED and hydrogen-based steelmaking in Europe;hydrogen flash ironmaking technology in the US;HYBRIT in the Nordics;Midrex H2TM by Midrex Technologies,Inc.(United States);H2FUTURE by Voestalpine(Austria);and SALCOS by Salzgitter AG(Germany).Hydrogen-rich blast furnaces(BFs)with COG injection are common in *** BFs have been industrially tested by AnSteel,XuSteel,and *** a currently under construction pilot plant of a coal gasification–gas-based shaft furnace with an annual output of 10000 t direct reduction iron(DRI),a reducing gas composed of 57 vol%H2 and 38 vol%CO is prepared via the Ende *** life cycle of the coal gasification–gas-based shaft furnace–electric furnace short process(30 wt%DRI+70 wt%scrap)is assessed with 1 t of molten steel as a functional *** plant has a total energy consumption per ton of steel of 263.67 kg standard coal and a CO2 emission per ton of steel of 829.89 kg,which are superior to those of a traditional BF converter *** domestic materials and fuels,hydrogen production and storage,and hydrogen reduction characteristics,we believe that a hydrogen-rich shaft furnace will be suitable in *** production and storage with an economic and large-scale industrialization will promote the further development of a full hydrogen shaft furnace.

关键词： hydrogen hydrogen metallurgy blast furnace shaft furnace low carbon

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Dipole-moment-induced effect on contact electrification for triboelectric nanogenerators

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Nano Research 2014年第7期7卷 990-997页

作者： Peng Bai Guang Zhu yu sheng zhou Sihong Wang Jusheng Ma Gong Zhang Zhong Lin Wang School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA Department of Mechanical Engineering Tsinghua University Beijing 100084 China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing China

Triboelectric nanogenerators （TENGs） have been demonstrated as an effective way to harvest mechanical energy to drive small electronics. The density of triboelectric charges generated on contact surfaces between two distinct materials is a critical factor for dictating the output power. We demonstrate an approach to effectively tune the triboelectric properties of materials by taking advantage of the dipole moment in polarized polyvinylidene fluoride （PVDF）, leading to substantial enhancement of the output power density of the TENG. The output voltage ranged from 72 V to 215 V under a constant contact force of 50 N. This work not only provides a new method of enhancing output power of TENGs, but also offers an insight into charge transfer in contact electrification by investigating dipole-moment-induced effects on the electrical output of TENGs.

关键词： triboelectricnanogenerator modulation dipole moment

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Efficacy of peripheral blood stem cell transplantation versus conventional chemotherapy on anaplastic large-cell lymphoma:a retrospective study of 64 patients from a single center

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Chinese Journal of Cancer 2012年第11期31卷 532-540页

作者： Xiao-Hui He Bo Li Shuang-Mei Zou Mei Dong sheng-yu zhou Jian-Liang Yang Li-Yan Xue sheng Yang Peng Liu Yan Qin Chang-Gong Zhang Xiao-Hong Han yuan-Kai Shi Department of Medical Oncology Deparkment of Pathology Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021P.R.China.

Anaplastic large-cell lymphoma(ALCL) is characterized by frequently presenting adverse factors at *** groups believed aggressive treatment strategies such as autologous stem cell transplantation brought survival benefit for ALCL ***,few compared these approaches with conventional chemotherapy to validate their ***,we report a study comparing the efficacy of peripheral blood stem cell transplantation(PBSCT) and conventional chemotherapy on ALCL.A total of 64 patients with primary systemic ALCL were studied *** median follow-up period was 51 months(range,1-167 months).For 48 patients undergoing conventional chemotherapy only,the 4-year event-free survival(EFS) and overall survival(OS) rates were 70.7% and 88.3%,***,16 patients underwent PBSCT,including 11 at first remission(CR1/PR1),3 at second remission,and 2 with disease progression during first-line *** 4-year EFS and OS rates for patients underwent PBSCT at first remission were 81.8% and 90.9%,*** with conventional chemotherapy,PBSCT did not show superiority either in EFS(P = 0.240) or in OS(P = 0.580) when applied at first *** analysis showed that patients with B symptoms(P = 0.001),stage III/IV disease(P = 0.008),bulky disease(P = 0.075),negative anaplastic lymphoma kinase(ALK) expression(P = 0.059),and age ≤ 60 years(P = 0.054) had lower ***,PBSCT significantly improved EFS in patients with B symptoms(100% vs.50.8%,P = 0.027) or bulky disease(100% vs.52.8%,P = 0.045) when applied as an up-front *** on these results,we conclude that,for patients with specific adverse factors such as B symptoms and bulky disease,PBSCT was superior to conventional chemotherapy in terms of EFS.

关键词：造血干细胞移植疗效比较淋巴瘤外周血化疗变性 EFS 单因素分析

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A retrospective analysis of real-world outcomes of elderly Chinese patients with diffuse large B-cell lymphoma

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Chinese Medical Journal 2019年第15期132卷 1807-1814页

作者： Peng Liu Ying Han Shi-yu Jiang Xiao-Hui He Yan Qin Lin Gui sheng-yu zhou Li-Qiang zhou Jian-Liang Yang sheng Yang Ting-yu Wen yuan-Kai Shi Department of Medical Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs Beijing 100021 China

Background:Elderly patents with diffuse large B-cell lymphoma (DLBCL) have a worse prognosis than younger patients,and the optimal treatment strategy for this group remains *** conducted a retrospective analysis to investigate the clinical features and outcomes of elderly patients (>60 years) and to assess the impact of clinical and molecular factors on outcome in this age ***:From April 2006 to December 2012,a total of 349 elderly patients with DLBCL from the National Cancer Center/Cancer Hospital,Chinese Academy of Medical Sciences,and Peking Union Medical College were included in this *** were further divided into two age groups (61-69 years and ≥70 years).We compared clinical characteristics and outcomes between ***:Of 349 total patients,204 (58.5%) were aged 61 to 69 years,and 145 (41.5%) patients were aged 70 years or *** for the Eastern Cooperative Oncology Group performance status,clinical characteristics were comparable between the two *** a median follow-up of 82 (range,1-129) months,the 5-year overall survival (OS) and progression-free survival (PFS) rates were 51.9% and 45.8%,*** 5-year OS rates for patients aged 61 to 69 years and those over 70 years were 58.3% and 42.8%(P =0.007),respectively,and the 5-year PFS rates were 51.0% and 38.6%(P =0.034).Treatment regimens including rituximab provided a higher 5-year OS rate (63.1% vs.37.1%,P < 0.001) and PFS rate (56.6% vs.31.8%,P < 0.001) than chemotherapy *** patients aged 61 to 69 years,chemotherapy plus rituximab resulted in a higher 5-year OS rate (66.7% vs.46.4%,P =0.002) and PFS rate (60.0% vs.38.1%,P =0.002) than chemotherapy *** patients aged ≥70 years,there was a marked survival advantage in patients who received chemotherapy plus rituximab (5-year OS rate:57.7% vs.25.4%,P < 0.001;5-year PFS rate:51.3% vs.23.9%,P < 0.001) compared with that seen in those who received chemotherapy *** analysis es

关键词： Elderly Diffuse large B-cell lymphoma Rituximab Prognosis

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Design and Implementation of a Proxy Caching System for Streaming Media

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Wuhan University Journal of Natural Sciences 2004年第1期9卷 31-36页

作者： TanJin yusheng-shengI zhouJing-li CollegeofComputerScienceandTechnology HuazhongUniversityofScienceandTechnologyWuhan430074HubeiChina

With the widespread use of streaming media application on the Internet, a significant change in Internet workload will be provoked. Caching is one of the applied techniques for enhancing the scalability of streaming system and reducing the workload of server/network. Aiming at the characteristics of broadband network in community, we propose a popularity-based server-proxy caching strategy for streaming medias, and implement the prototype of streaming proxy caching based on this strategy, using RTSP as control protocol and RTP for content transport. This system can play a role in decreasing server load, reducing the traffic from streaming server to proxy, and improving the start-up latency of the client. Key words streaming server - proxy - cache - streaming media - real time streaming protocol CLC number TP 302 - TP 333 Foundation item: Supported by the National High Technology Development 863 Program of China (2001AA111011).Biography: Tan Jin (1962-), male, Ph. D candidate, research direction: network communications, multimedia technologies, and web caching.

关键词： streaming server proxy cache streaming media real time streaming protocol

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Importance of Sample Size for the Estimation of Repeater F Waves in Amyotrophic Lateral Sclerosis

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Chinese Medical Journal 2015年第4期128卷 515-519页

作者： Jia Fang Ming-sheng Liu yu-zhou Guan Bo Cui Li-Ying Cui Department of Neurology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 China

Background：In amyotrophic lateral sclerosis （ALS）,repeater F waves are *** assessment of repeater F waves requires an adequate sample ***：We studied the F waves of left ulnar nerves in ALS *** on the presence or absence of pyramidal signs in the left upper limb,the ALS patients were divided into two groups：One group with pyramidal signs designated as P group and the other without pyramidal signs designated as NP *** Index repeating neurons （RN） and Index repeater F waves （Freps） were compared among the P,NP and control groups following 20 and 100 stimuli *** each group,the Index RN and Index Freps obtained from 20 and 100 stimuli were ***：In the P group,the Index RN （P =0.004） and Index Freps （P =0.001） obtained from 100 stimuli were significantly higher than from 20 *** F waves obtained from 20 stimuli,no significant differences were identified between the P and NP groups for Index RN （P =0.052） and Index Freps （P =0.079）; The Index RN （P ＜ 0.001） and Index Freps （P ＜ 0.001） of the P group were significantly higher than the control group; The Index RN （P =0.002） of the NP group was significantly higher than the control *** F waves obtained from 100 stimuli,the Index RN （P ＜ 0.001） and Index Freps （P ＜ 0.001） of the P group were significantly higher than the NP group; The Index RN （P ＜ 0.001） and Index Freps （P ＜ 0.001） of the P and NP groups were significantly higher than the control ***：Increased repeater F waves reflect increased excitability of motor neuron pool and indicate upper motor neuron dysfunction in *** an accurate evaluation of repeater F waves in ALS patients especially those with moderate to severe muscle atrophy,100 stimuli would be required.

关键词： Amyotrophic Lateral Sclerosis Repeater F waves Upper Motor Neuron

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R-CHOP regimen can significantly decrease the risk of disease relapse and progression in patients with non-germinal centerB-cell subtype diffuse large B-cell lymphoma

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Chinese Journal of Cancer 2012年第6期31卷 306-314页

作者： Xiao-Hui He Bo Li sheng Yang Ning Lu Xun Zhang Shuang-Mei Zou Ye-Xiong Li Yong-Wen Song Shan Zheng Mei Dong sheng-yu zhou dian-Liang Yang Peng Liu Chang-Gong Zhang Yan Qin Feng-Yi Feng yuan-Kai Shi Department of Medical Oncology Beijing 100021P.R.China Department of Pathology Beijing 100021P.R.China Department of Radiation Oncology Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021P.R.China

To further explore the role of rituximab when added to the CHOP-like regimen in the treatment of immunohistochemically defined non-germinal center B-cell subtype (non-GCB) diffuse large B-celllymphoma (DLBCL), 159 newly diagnosed DLBCL patients were studied retrospectively based on the immunohistochemical evaluation of CD10, Bcl-6, MUM-1, and Bcl-2. Altogether, 110 patients underwent the CHOP-like regimen, and rituximab was added for the other 49 patients. Cox regression analysis showed that compared with the CHOP-like regimen, the rituximab-based regimen (R-CHOP regimen)significantly decreased the risk of disease relapse and progression in CD10-negative patients (P=0.001),Bcl-6-negative patients (P=0.01), and MUM-1-positive patients (P=0.003). The risk of disease relapse in patients with non-GCB subtype (P=0.002) also decreased. In contrast, patients with the opposite immunohistochemical marker expression profile and GCB subtype did not benefit from treatment with the R-CHOP regimen. In addition, non-GCB subtype patients had a significantly higher expression rate of Bcl-2 than GCB subtype patients (P=0.042). Although univariate analysis found that both Bcl-2-positive and-negative patients had significantly higher event-free survival rates with the R-CHOP regimen, only Bcl-2 positivity (P=0.004) maintained significance in the Cox regression analysis. We conclude that the addition of rituximab can significantly improve the prognosis of patients with non-GCB subtype DLBCL, which is closely related to the expression of CD10, Bcl-6, MUM-1, and Bcl-2.

关键词： B细胞淋巴瘤弥漫性患者亚型风险复发疾病生发

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Ifosfamide, Cisplatin or Carboplatin, and Etoposide （ICE）-based Chemotherapy for Mobilization of Autologous Peripheral Blood Stem Cells in Patients with Lymphomas

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Chinese Medical Journal 2015年第18期128卷 2498-2504页

作者： Ping zhou Peng Liu sheng-yu zhou Xiao-Hui He Xiao-Hong Han Yan Qin sheng Yang Chang-Gong Zhang Lin Gui Jia-Rui Yao Li-Ya Zhao Shu-Xiang Zhang Yan Sun yuan-KaiShi Department of Medical Oncology Cancer Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs Beijing 100021 China

Background： High-dose chemotherapy followed by autologous stem cell transplantation （ASCT） is a promising approach tbr lymphomas. This study aimed to evaluate the effect of ifosfamide, cisplatin or carboplatin, and etoposide （ICE）-based regimen as a mobilization regimen on relapsed, refractory, or high-risk aggressive lymphoma. Methods： From June 2001 to May 2013, patients with lymphomas who mobilized by ICE-based regimen for ASCT were analyzed in this retrospective study. The results of the autologous peripheral blood stem cells collection, toxicity, engraftment after ICE-based mobilization regimen were analyzed in this study. Furthermore, risk factors for overall survival （OS） and progression free survival （PFS） were evaluated by univariate analysis. Results： The stem cells were mobilized using ICE-based regimen plus rituximab or ICE-based regimen alone in 12 patients and 54 patients, respectively. The results of stem cell mobilization were excellent. Ninety-seven percentages of the patients had the stein cell collection of at least 2.0 ×10^6, CD34^＋ cells/kg and 68% had at least 5 × 10^6, CD34^＋ cells/kg. Fifty-eight percentage of the patients experienced Grade 4 neutropenia, 20% developed febrile neutropenia, and only 12% had Grade 4 thrombocytopenia. At a median follow-up of 63.8 months, the 5-year PFS and OS were 64.4% and 75.3%, respectively. Conclusion： ICE is a powerful regimen for stem cell mobilization in patients with lymphomas.

关键词： ICE Mobilization: Rituximab Stem Cell Transplantation

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F Wave Study in Amyotrophic Lateral Sclerosis： Assessmen of Segmental Motoneuronal Dysfunction

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Chinese Medical Journal 2015年第13期128卷 1738-1742页

作者： Jia Fang Li-Ying Cui Ming-sheng Liu yu-zhou Guan Xiao-Guang Li Bo Cui Qing-yun Ding Department of Neurology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100730 China

Background： Dysfunctional spinal circuit may play a role in the pathophysiology ofarnyotrophic lateral sclerosis （ALS）. The purpose of this study was to use F waves for assessment of segmental motoneuronal excitability following upper motor neuron （UMN） dysfunctions in ALS. Meihods： We studied the F waves of 152 ulnar nerves recorded fi＇om abductor digiti minimi in 82 patients with ALS. Two groups of hands were defined based on the presence or absence of pyramidal signs in the same upper limb. The group with pyramidal signs in tile upper limbs was designated as the P group, and the group without pyramidal signs in the upper limbs was designated as the NP group. Results： The mean （P 〈 0.001）, median （P 〈 0.001） and maximum （P = 0.035） F wave amplitudes, mean （P 〈 0.001 ）, median （P 〈 0.001） and maximum （P - 0.003） F/M amplitude ratio, index repeating neuron （P 〈 0.001 ） and index repeater F waves （P 〈 0.001 ） of the P group were significantly increased compared with the NP group. No significant differences were identified for F wave chronodispersion （P= 0.628）, mean F wave latency （P 0.151 ）, minimum F wave latency （P = 0.211 ）, maximum F wave latency （13 = 0. 199）. F wave persistence （P = 0.738）. F wave duration （P = 0. 152）, F wave conduction velocity （P = 0.813） and number of giant F waves （P = 0.072） between the two groups. Conclusions＂ In this study, increased F wave amplitude, F/M amplitude ratio and number of repeater F waves reflected enhanced segmental lnotoneuronal excitability following UMN dysfunctions in ALS.

关键词： Amyotrophic Lateral Sclerosis: Excitability F wave Segmental Motoneuron Upper Motor Neuron

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