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Synthesis of free-standing Ga_2O_3 films for flexible devices by water etching of Sr_3Al_2O_6 sacrificial layers

Chinese Physics B 2019年第1期28卷 166-170页

作者： Xia Wang Zhen-Ping Wu Wei Cui Yu-Song Zhi Zhi-Peng Li Pei-gang Li Dao-You guo Wei-Hua Tang Laboratory of Information Functional Materials and Devices School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100876China Center for Optoelectronics Materials and Devices Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China

Flexible electronic devices have attracted much attention due to their practical and commercial value. Integration of thin films with soft substrate is an effective way to fabricate flexible electronic devices. Ga_2O_3 thin films deposited directly on soft substrates would be amorphous mostly. However, the thickness of the thin film obtained by mechanical exfoliation method is difficult to control and the edge of the film is fragile and easy to be damaged. In this work, we fabricated free-standing Ga_2O_3 thin films using the water-soluble perovskite Sr_3Al_2O_6 as a sacrificial buffer layer. The obtained Ga_2O_3 thin films were polycrystalline. The thickness and dimension of the films were controllable. A flexible Ga_2O_3solar-blind UV photodetector was fabricated by transferring the free-standing Ga_2O_3 film on a flexible polyethylene terephthalate substrate. The results displayed that the photoelectric performances of the flexible Ga_2O_3 photodetector were not sensitive to bending of the device. The free-standing Ga_2O_3 thin films synthesized through the method described here can be transferred to any substrates or integrated with other thin films to fabricate electronic devices.

关键词： free-standing Ga2O3 thin film crystalline Sr3Al2O6 flexible photodetector

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A Case of Thoracic Spinal Stenosis Secondary to Paget's Disease

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Chinese Medical Sciences Journal 2010年第2期25卷 125-128页

作者： Yu Zhao Yi-peng Wang Gui-xing Qiu jian-xiong Shen Xi-sheng Weng Xiang Li Nai-guo Wang Department of Orthopedic Surgery Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730 China

PAGET＇S disease, also called osteitis deformans, is a metabolic bone disorder. It is characterized by increased bone resorption and the compensatory formation of new bones. The increased bone conversion and remodeling lead to the incrustation of woven bones and lamellar bones and finally result in the expansion, loosening, and excessive vascularization of the affected bones, rendering them susceptible to deformity and fracture. Paget＇s disease occurs much more commonly in Anglo-Saxons than in Asians and Africans.

关键词： Paget's disease thoracic spinal stenosis surgical decompression

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Project portfolio Bidding decision with Interaction Effect

Project portfolio Bidding decision with Interaction Effect

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第43届中国控制会议

作者： CHENG guo guo Qian WU gang Zhao Tian-miao Southwest Jiaotong University School of Transportation and Logistics Tangshan Institute of Southwest Jiaotong University

Bidding decision is a crucial part of the management activities of construction enterprises, and an important way for enterprises to improve resource utilization and achieve strategic goals. By using the planning tool of Quality Function Deployment, the synergistic relationship between enterprise demand goals and candidate projects, as well as between projects,is established, and a quality house of project portfolio bidding decision-making is constructed. Based on the output results of the quality house, the interaction effect between projects is taken into account to establish an optimization model of bidding project portfolio under resource constraints. An improved genetic algorithm solution model is designed according to the characteristics of the model. Our aim is to provide a theoretically reliable and operable project decision-making method for the overall planning and collaborative operation of construction enterprises in the early stage of bidding, and to provide decisionmaking support for enterprises to formulate bidding strategies.

关键词： Bidding decision Project portfolio Interaction effect Quality house Improved genetic algorithm

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是儒家心学还是道教内丹学——析《李卓吾先生批评西游记》批语的立足点

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宗教学研究 2010年第2期 39-42页

作者：郭健中国社会科学院文学研究所博士后流动站

《李卓吾先生批评西游记》中的批语虽然对"心"十分强调,但是其立足点并不是儒家心学,而是道教内丹学。批语的真正作者确实不是李卓吾,而是另一熟悉内丹学之人。

关键词：西游记内丹学儒家道教李卓吾

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Investigation of modeling on single grit grinding for martensitic stainless steel

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Journal of Central South University 2018年第8期25卷 1862-1869页

作者： NIE Zhen-guo WANG gang jianG Feng LIN Yong-liang RONG Yi-ming State Key Laboratory of Tribology&Institute of Manufacturing Engineering Department of Mechanical EngineeringTsinghua University Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control Tsinghua University Mechanical Engineering Department Carnegie Mellon University College of Mechanical Engineering and Automation Huaqiao University School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Mechanical and Energy Engineering Department South University of Science and Technology of China

Single grit grinding is the simplified model to abstract the macro scale *** element analysis is a strong tool to study the physical fields during a single grit grinding process,compared to experimental *** on the dynamic mechanical behavior of 2Cr12Ni4Mo3VNbN steel and the mathematical statistics of abrasive grit,modeling of the single grit grinding process was conducted by using commercial software *** validation experiment was designed to validate the correctness of the FEA model by contrast with grinding *** validation result shows that the FEA model can well describe the single grit grinding *** the grinding force and multi-physics fields were studied by experimental and simulation *** was found that both the normal and tangential grinding forces were linearly related to the cutting speed and cutting *** maximum temperature is located in the subsurface of the workpiece in front of the grit,while the maximum stress and strain are located under the grit *** strain rate can reach as high as about 106 s–1 during the single grit grinding,which is larger than other traditional machining operations.

关键词： modeling single grit grinding grinding force multi-physics martensitic stainless steel

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Preparation of Ultrafine Cobalt Powder by Chemical Reduction in Aqueous Solution

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Chinese Chemical Letters 2001年第6期12卷 555-558页

作者： Jin Zhang GAO Yan Chun ZHAO jian Niao TIAN Wu YANG Fei GUAN Xiao Quan LU Yong Jun MA Jing guo HOU Jing Wan KANG Chemistry and Chemical Engineering College Northwest Normal UniversityLanzhou 730070

Nanocrystalline cobalt powders have been prepared from aqueous solution by reducing their corresponding metal salts under suitable conditions. The experimental conditions have been studied in detail. X-ray powder diffraction patterns show that the cobalt powder is hexagonal crystallite. The average particle size of the ultrafine cobalt powder is 55 nm.

关键词： Nanocrystalline cobalt powder preparation

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Could tumor characteristics identified by colonoscopy predict the locally advanced rectal carcinoma？

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Chinese Medical Journal 2010年第17期123卷 2353-2357页

作者： WANG Hao CAO Fu-ao GONG Hai-feng ZHENG jian-ming FU Chuan-gang Department of Colon and Rectal Surgery Changhai Hospital of Second Military Medical University Shanghai 200433 China Department of Pathology Changhai Hospital of Second Military Medical University Shanghai 200433 China

Background Neoadjuvant chemoradiation is now considered the standard care for locally advanced rectal carcinoma （T3-4 or/and N1-2 lesions）, but the accuracy of staging examinations including endorectal ultrasonography （ERUS） and MRI is far from excellent. In addition, the above staging equipment or professionals who perform the examinations may not be available in some hospitals, while preoperative colonoscopy and biopsy are usually obtainable in most *** objective of the present study was to investigate the clinical and pathological characteristics of locally advanced rectal carcinoma and identify candidates for neoadjuvant *** This was a retrospective study. Patients who were treated for rectal cancer at Changhai Hospital from January 1999 to July 2008 were identified from our prospectively collected database. Statistical analysis was performed using SPSS Software System （version 15.0）. The Mann-Whitney test, chi-square test and multivariate Logistic regression analysis were performed,Results A total of 1005 cases were included in this research, of which 761 cases were identified as locally advanced rectal carcinoma depending on postoperative TNM staging. The results of multivariate Logistic regression analysis indicated seven independent risk factors that could be used to predict a locally advanced rectal carcinoma independently： a high grade （including poor differentiation and undifferentiation）（OR： 3.856; 95% CI： 2.064 to 7.204;P=0.000）; large tumor size （OR： 2.455; 95% CI： 1.755 to 3.436; P=0.000）; elevated preoperative serum CEA level （OR：1.823; 95% CI： 1.309 to 2.537; P=0.000）; non-polypoid tumor type （OR： 1.758; 95% CI： 1.273 to 2.427; P=0.001）; the absence of synchronous polyps （OR： 1.602; 95% CI： 1.103 to 2.327; P=0.013）; the absence of blood in stool （OR： 1.659;95% CI： 1.049 to 2.624; P=0.030）; and a greater circumferential tumor extent （OR： 1.813; 95% CI： 1.055 to 3,113;P=0.031）. Based on these findings, a Logistic equation

关键词： risk factors rectal neoplasms predicting model

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High-power femtosecond laser generation from an all-fiber linearly polarized chirped pulse amplifier

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High Power Laser Science and Engineering 2023年第2期11卷 81-87页

作者： Tao Wang Can Li Bo Ren Kun guo jian Wu Jinyong Leng Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangshaChina

An all-fiber high-power linearly polarized chirped pulse amplification(CPA)system is experimentally *** stretching the pulse duration to a full width of approximately 2 ns with two cascaded chirped fiber Bragg gratings(CFBGs),a maximum average output power of 612 W is achieved from a high-gain Yb-doped fiber that has a core diameter of 20μm with a slope efficiency of approximately 68%at the repetition rate of 80 *** the maximum output power,the polarization degree is 92.5%and the M^(2)factor of the output beam quality is approximately 1.29;the slight performance degradations are attributed to the thermal effects in the main *** optimizing the B-integral of the amplifier and finely adjusting the higher-order dispersion of one of the CFBGs,the pulse width is compressed to 863 fs at the highest power with a compression efficiency of 72%,corresponding to a maximum compressed average power of 440.6 W,single pulse energy of 5.5μJ and peak power of about 4.67 *** the best of our knowledge,this is the highest average power of a femtosecond laser directly generated from an all-fiber linearly polarized CPA system.

关键词： chirped pulse amplification femtosecond laser fiber laser high-power laser ultrafast laser

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Territory maximization hypothesis during peripheral nerve regeneration

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Neural Regeneration Research 2018年第2期13卷 230-231页

作者： jiu-xu deng jian weng yu-hui kou pei-xun zhang yan-hua wang na han bao-guo jiang xiao-feng yin department of orthopedics and trauma peking university people's hospitalBeijingChina

Territory awareness refers to the notion that an organism lives in a territory, considers this territory its own, and prevents entry of other organisms. Generally, an organism maximizes its territory for best survival... 详细信息

关键词： Territory maximization hypothesis during peripheral nerve regeneration

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Mechanical Frequency Spectrum Sub-band Feature Estimation Based on Multiple Types Correlation Analysis

Mechanical Frequency Spectrum Sub-band Feature Estimation Ba...

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第三十九届中国控制会议

作者： jian Tang Meiying Jia Fupeng Wang jian Zhang gang Yu Faculty of Information Technology Beijing University of Technology 55th Institute Joint staff of the Central Military Commission 91411 Unit PLA College of computer and software Nanjing University of Information Science and Technology State Key Laboratory of Process Automation in Mining & Metallurgy

Mill load is one of the key factors that affects the operation optimization and control of grinding process. It is difficult to detect accurately in real time. The mill load relates to multiple channel mechanical signals, such as the mill shell vibration signals, the shaft seat front and rear vibration signals, the acoustic signals near to the shell surface and under the grinding area, *** to evaluate these sub-band feature of the mechanical spectrum of the above channels is a difficult problem. It can help to clarify the ball mill grinding mechanism and the mechanical signal generation mechanism. To solve these problems, this paper proposes a multi-channel mechanical frequency spectrum sub-band feature evaluation method based on multiple types correlation analysis. Firstly, the multi-channel mechanical signals are transformed from time domain to frequency domain to obtain the frequency spectrum data, which are divided into several sub-bands to extract features. Then, the normalized correlation coefficients between the multi-channel sub-band feature and the mill load are calculated. Thirdly, based on the partial least square algorithm, the variable projection importance（VIP） value of sub-band features are also calculated. The VIPs are normalized same as that of correlation coefficient. Finally, a new index is calculated by using normalized correlation coefficient and VIP value and the model’s prediction performance. These sub-band features of single channel and all channel mechanical signals are measured based on the new defined combined evaluation index. The multi-channel mechanical signals of a laboratory-scale ball mill are used to verify the effectiveness of the proposed method.

关键词： Multiple channel mechanical signals mechanical frequency spectrum sub-band features correlation coefficient variable projection importance(VIP)

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