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Single-chain and monolayered conjugated polymers for molecular electronics

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Chinese Chemical Letters 2016年第8期27卷 1209-1222,1466页

作者： zhao-yang zhang Tao Li School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Exploring the charge transport properties and electronic functions of molecules is of primary interest in the area of molecular *** polymers（CPs） represent an attractive class of molecular candidates,benefiting from their outstanding optoelectronic ***,they have been less studied compared with the small-molecule family,mainly due to the difficulties in incorporating CPs into molecular *** this review,we present a summary on how to fabricate CP-based singlechain and monolayered junctions,then discuss the transport behaviors of CPs in different junction architectures and finally introduce the potential applications of CPs in molecular-scale electronic *** the research on CP-based molecular electronics is still at the initial stage,it is widely accepted that（1） CP chains are able to mediate long-range charge transport if their molecular electronic structures are properly designed,which makes them potential molecular wires,and（2） the intrinsic optoelectronic properties of CPs and the possibility of incorporating desirable functionalities by synthetic strategies imply the potential of employing tailor-made polymeric components as alternatives to small molecules for future molecular-scale electronics.

关键词： Molecular electronics Conjugated polymers Molecular junctions Charge transport Molecular wire Functional devices

Versatile Functionalization of Carbon Nanomaterials by Ferrate(Ⅵ)

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Nano-Micro Letters 2020年第3期12卷 12-21页

作者： Ying Zhou zhao‑yang zhang Xianhui Huang Jiantong Li Tao Li School of Chemistry and Chemical Engineering Key Laboratory of Thin Film and Microfabrication(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Electrical Engineering and Computer Science KTH Royal Institute of TechnologyElectrum 22916440 KistaSweden

As a high-valent iron compound with Fe in the highest accessible oxidation state,ferrate(VI)brings unique opportunities for a number of areas where chemical oxidation is ***,it is emerging as a novel oxidizing agent for materials chemistry,especially for the oxidation of carbon ***,the reported reactivity in liquid phase(H2SO4 medium)is confusing,which ranges from aggressive to moderate,and even ***,the solid-state reactivity underlying the“dry”chemistry of ferrate(VI)remains poorly ***,we scrutinize the reactivity of K2FeO4 using fullerene C60 and various nanocarbons as *** results unravel a modest reactivity in liquid phase that only oxidizes the active defects on carbon surface and a powerful oxidizing ability in solid state that can open the inert C=C bonds in carbon *** also discuss respective benefit and limitation of the wet and dry *** work provides a rational understanding on the oxidizing ability of ferrate(VI)and can guide its application in functionalization/transformation of carbons and also other kinds of materials.

关键词： Ferrate(VI) Reactivity Carbon nanomaterials Oxidation

PMAC Principle and Its Application to Cell Winding

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Journal of Rare Earths 2004年第Z1期22卷 352-354页

作者： zhao Xiaolong yang yonggang zhang Zhiyuan Wu Fengming Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co Ltd.Baotou 014030 China

The structure and principle of the PMAC (Programmable Multi-Axis Controller) were *** implementation of PMAC hardware was illustrated by taking the winding process of one cell for *** main obvious character of PMAC is to complete a movement program in turns of movement *** PMAC is notified to execute a motion program, it will process one command every time and finish all the calculation to be ready for real *** card works always prior to real action, when necessary, it can always coordinate correctly with the action which will be carried out soon PMAC will automatically carry out the function of resource management periodically to make sure that the whole system is in correct *** also, it can communicate with host computer anytime even during a movement *** responsibility of PMAC is to organize command according to priority to optimize the system, so as to run the application program safely and *** function and application of control were emphasized.

关键词： PMAC winding machine control encoder arbor movement program

Centralized and distributed resource allocation in OFDM based multi-relay system

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第6期11卷 450-464页

作者： Rui YIN Yu zhang Guan-ding YU zhao-yang zhang Jie-tao zhang Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 31002 7 China Wireless Research Department Huawei Technologies Co. Ltd. Shenzhen 518129 China

In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing(OFDM) based wireless *** Lagrange dual method was employed to design the optimal ***, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual ***, the optimal algorithm for a multi-relay system was proposed in a similar *** with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial ***, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical *** results verify our analysis.

关键词： Wireless relay network Orthogonal frequency division multiplexing(OFDM) Relay selection Convex optimization Dual method

Study of charge structure and radiation characteristic of intracloud discharge in thunderstorms of Qinghai-Tibet Plateau

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Science China Earth Sciences 2004年第Z1期47卷 108-114页

作者： ZHAGN Yijun DONG Wansheng zhao yang zhang Guangshu zhang Hongfa CHEN Chengpin zhang Tong Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

The comprehensive observations on lightning discharges were conducted in Naqu area of Qinghai-Tibet Plateau in summer of 2002. The electric structures of thunderstorms and the characteristics of lightning discharges at initial stage were analyzed by using the observation data. The results show that most of intracloud (IC) lightning flashes were polarities inverted in thunderstorms with tripole electric charge structure and occurred between negative charge region located in the middle of the thunderstorm and positive charge region located at the bottom of the thunderstorm. The radiation characteristics of discharge processes in cloud with longer lasting time involved in Cloud-to-Ground (CG) lightning flashes were similar to that of IC discharges.A lot of radiation pulses were produced in these discharge processes. Because the IC discharges took place at the bottom of thundercloud and were near the ground, they may produce more serious damage to equipment on the ground therefore should not be neglected in lightning protection.

关键词： Qinghai-Tibet Plateau, characteristics of lightning discharges, charge structure of thunderstorm.

Serial decoding of rateless code over noisy channels

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第10期12卷 855-866页

作者： Ke-di WU zhao-yang zhang Shao-lei CHEN Sheng-tian yang Pei-liang QIU Institute of Information and Communication Engineering Zhejiang University Hangzhou 310027 China Self-employed at Zhengyuan Xiaoqu 10-2-101 Hangzhou 310011 China

Rateless code usually generates a potentially infinite number of coded packets at the encoder and collects enough packets at the decoder to ensure reliable recovery of multiple information *** conventional rateless decoder usually works in a parallel manner which needs to initiate a new belief propagation (BP) decoding procedure upon each newly received collection of coded packets,thereby resulting in prohibitive decoding complexity in *** this paper,we present a novel serial decoding algorithm,i.e.,the serial storage belief propagation (SS BP) algorithm,for rateless codes over noisy ***,upon receiving a new group of coded packets,the decoder initiates a new attempt to decode all the packets received so far,using the results of the previous attempt as initial ***,in each iteration of the new attempt,the decoder serially propagates the messages group by group from the most recent one to the earliest *** this way,the newly updated messages can be propagated faster,expediting the recovery of information *** addition,the proposed serial decoding algorithm has significantly lower complexity than the existing parallel decoding *** results validate its effectiveness in AWGN,Rayleigh,and Rician fading channels.

关键词： Rateless code Fountain codes Serial decoding Noisy channel

Clinical significance of SQSTM1/P62 and nuclear factor-κB expression in pancreatic carcinoma

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World Journal of Gastrointestinal Oncology 2020年第7期12卷 719-731页

作者： zhao-yang zhang Sen Guo Rui zhao Zhi-Peng Ji Zhuo-Nan Zhuang Department of Emergency Surgery Qilu HospitalShandong UniversityJinan 250012Shandong ProvinceChina Department of General Surgery Qilu HospitalShandong UniversityJinan 250012Shandong ProvinceChina Department of General Surgery Second Affiliated Hospital of Shandong UniversityJinan 250033Shandong ProvinceChina Department of Gastrointestinal Surgery Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102200China

BACKGROUND Overexpression of SQSTM1(sequestosome 1,P62)and nuclear factor-κB(NF-κB)plays an important role in the invasion and metastasis of a variety of malignant *** To explore the expression of P62 and NF-κB in pancreatic cancer and their relationship with clinicopathological *** The expression levels of P62 and NF-κB were analyzed by immunohistochemistry with a tissue chip containing 40 cases of human pancreatic *** we analyzed the correlation among P62 expression,phospho-P65 expression,and clinicopathological features of pancreatic carcinoma *** P62 expression was mainly observed in the cytoplasm of pancreatic carcinoma *** P65(phospho-P65)was mainly expressed in the nucleus and cytoplasm of pancreatic carcinoma *** was a significant difference in P62 expression among T *** a significant difference in phosphor-P65 expression among pathology types was *** the cases with strongly positive P62 expression,significant differences were found in *** there were significant differences in T stage and tumor-node-metastasis stage in the cases with strongly positive phosphor-P65 *** In pancreatic carcinoma,P62 expression is significantly correlated with T *** may be a valuable malignant indicator for human pancreatic carcinoma.

关键词： Pancreatic carcinoma Phosphorylated P65 P62 SQSTM1 Nuclear factor-κB Malignant

Integrin αvβ6 and matrix metalloproteinase 9 correlate with survival in gastric cancer

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World Journal of Gastroenterology 2016年第14期22卷 3852-3859页

作者： Pei-Long Lian zhao Liu Guang-Yun yang Rui zhao zhao-yang zhang Yue-Guang Chen Zhuo-Nan Zhuang Ke-Sen Xu Department of Hepatobiliary Surgery Qilu Hospital Shandong University Department of Hepatobiliary and Pancreatic Surgery Jinan Central Hospital Affiliated to Shandong University Department of Hepatobiliary Surgery Chinese People’s Liberation Army General Hospital Department of General Surgery Beijing Tsinghua Changgung Hospital Medical Center Tsinghua University

AIM: To investigate the expression of integrin αvβ6 and matrix metalloproteinase 9 (MMP-9), their association with prognostic factors and to assess their predictive role in gastric cancer ***: Immunohistochemistry was used to determine the expressions of integrin αvβ6 and MMP-9 in 126 specimens from patients with primary gastric carcinoma. Associations between immunohistochemical staining and various clinic pathologic variables of tissue specimens were evaluated by the χ2 test and Fisher’s exact test. Expression correlation of αvβ6 and MMP-9 was assessed using bivariate correlation analysis. The patients were followed-up every 3 mo in the first two years and at least every 6 mo afterwards, with a median follow-up of 56 mo (ranging from 2 mo to 94 mo). Four different combinations of αvβ6 and MMP-9 levels (that is, both markers positive, both markers negative, αvβ6 positive with MMP-9 negative, and αvβ6 negative with MMP-9 positive) were evaluated for their relative effect on survival. The difference in survival curves was evaluated with a log-rank test. Survival analysis was conducted using the Kaplan-Meier survival and Cox proportional hazards model ***: The expressions of integrin αvβ6 and MMP-9 were investigated in 126 cases, among which 34.92% were positive for αvβ6 expression, and 42.06% for MMP-9 expression. The expression of αvβ6 was associated with Lauren type, differentiation, N stage, and TNM stage (the P values were 0.006, 0.038, 0.016, and 0.002, respectively). While MMP-9 expression was associated with differentiation, T stage, N stage, and TNM stage (the P values were 0.039, 0.014, 0.033, and 0.008, respectively). The positive correlation between αvβ6 and MMP-9 in gastric cancer was confirmed by a correlation analysis. The Kaplan-Meier survival

关键词： Gastric cancer Integrin α vβ 6 Prognosis Matrix metalloproteinase 9 Survival

Cooperative spectrum sensing in cognitive radio systems with limited sensing ability

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第3期11卷 175-186页

作者： Hui HUANG zhao-yang zhang Peng CHENG Ai-ping HUANG Pei-liang QIU Department o fin formation Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Intel China Research Center Intel Lab Beijing 100191 China

In cognitive radio systems,the design of spectrum sensing has to face the challenges of radio sensitivity and wide-band frequency agility. It is difficult for a single cognitive user to achieve timely and accurate wide-band spectrum sensing because of hardware limitations. However,cooperation among cognitive users may provide a way to do so. In this paper,we consider such a cooperative wide-band spectrum sensing problem with each of the cognitive users able to imperfectly sense only a small portion of spectrum at a time. The goal is to maximize the average throughput of the cognitive network,given the primary network's collision probability thresholds in each spectrum sub-band. The solution answers the essential questions:to what extent should each cognitive user cooperate with others and which part of the spectrum should the user choose to sense? An exhaustive search is used to find the optimal solution and a heuristic cooperative sensing algorithm is proposed to simplify the computational com-plexity. Inspired by this optimization problem,two practical cooperative sensing strategies are then presented for the centralized and distributed cognitive network respectively. Simulation results are given to demonstrate the promising performance of our proposed algorithm and strategies.

关键词： Cognitive radio Cooperative spectrum sensing Limited sensing ability Throughput