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Mechanical Harvesting Effects on Seed Yield Loss,Quality Traits and Profitability of Winter Oilseed Rape (Brassica napus L.)

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Journal of Integrative Agriculture 2012年第8期11卷 1297-1304页

作者： MA Ni zhang Chun-lei LI Jun zhang ming-hai CHENG Yu-gui LI Guang-ming zhang Shu-jie Oil Crops Research Institute Chinese Academy of Agricultural Sciences/Key Laboratory of Oil Crop Biology Ministry of Agriculture/Key Laboratory of Crop Cultivation and Physiology Ministry of Agriculture Wuhan 430062 PR.China Agricultural Institute of Yichang City Yichang 443004 P.R.China

China is one of the most important rapeseed producing countries in the world. Effective mechanical harvesting time for decreasing harvesting loss of winter oilseed rape has been becoming a critical factor. An elite cultivar Zhongshuang 11 （Brassica napus L.） was employed in two rounds of field experiments from 2009 to 2011. Seeds were sown with machine, three combine harvesting times namely combine harvesting A, B, and C （CHA, CHB, and CHC） were designed and manual harvesting （MH） as control was performed at maturity. The harvesting treatments were determined according to color of pod and seed in the field. Seed yield loss and quality in different treatments were evaluated. Results showed that both seed yields and harvesting losses in 2009-2010 were higher than that in 2010-2011, whereas seed oil contents in 2010-2011 were higher than that in 2009-2010. The highest yield appeared in CHB, which was significantly higher than that in MH. Furthermore, harvesting loss in CHB were 50% that in MH. Seed oil content and chlorophyll exhibited no obvious difference between CHB and MH. Economic profit analysis demonstrated that mechanical sowing/combine harvesting （MS/CH） showed an input/output ratio of 1：1.6, and it was 1：1.2 in mechanical sowing/manual harvesting （MS/MH）. Labor-cost accounted for more than 70% of the total cost in MS/MH, which led to low profitability to a great extent. Our results suggested that CHB was the optimum harvesting time for winter oilseed rape along the Yangtze River.

关键词： winter oilseed rape (Brassica napus L.) combine harvesting harvesting loss seed quality economic profit

Study on Contact Algorithm of Dynamic Explicit FEM for Sheet Forming Simulation

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Wuhan University Journal of Natural Sciences 2001年第3期6卷 704-708页

作者： zhang hai-ming Dong Xiang-huai Li Zhi-gang State Key Laboratory of PFSDMT Huazhong Univ. of Sci./Technology Wuhan 430074 China

Based on existing algorithms, a newly developed contact search algorithm is proposed. The new algorithm consists of global search, local searching, local tracking and penetration calculation processes. It requires no iteration steps. It can deal with not only general tool surfaces with vertical walls, but also tool surfaces meshed with elements having very poor aspect ratios. It is demonstrated that the FE code employing this new contact search algorithm becomes more reliable, efficient and accurate for sheet metal forming simulation than conventional ones.

关键词： contact algorithm dynamic explicit FEM sheet metal forming

Double Slag Operation Dephosphorization in BOF for Producing Low Phosphorus Steel

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Journal of Iron and Steel Research International 2009年第3期16卷 6-14页

作者： TIAN Zhi-hong LI Ben-hai zhang Xiao-ming JIANG Zhong-hang Shougang Research Institute of Technology Shougang Group Beijing 100041 China

A study on the production of low phosphorus steel by double slag operation in 210 t converter was carried out. A phosphorus content of less than 0.005% （mass percent） was obtained before tapping. About 80% phosphorus could be removed by the first slag after 5 min. High Fe^3＋ content and high basicity in the first slag were in favor of dephosphorization. On the other hand,Fe3＋ content had less effect on dephosphorization during second slag treatment. In the second slag period,the fraction of dephosphorization increased with the increase of basicity up to a basicity of 6. Further increase of basicity of the second slag had very little effect on dephosphorization. The tapping temperature had great impact on dephosphorization. It was impossible to get phosphorus less that 0.005% when the tapping temperature was higher than 1 943 K. The optimum operation conditions were suggested. On the basis of these conditions,the amount of the second slag and the effect of the remaining first slag were estimated.

关键词： dephosphorization double slag low phosphorus steel converter

Enhancement of the up-conversion luminescence of ZnO:Yb3+/Er3+ by photonic crystals

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Optoelectronics Letters 2019年第3期15卷 195-199页

作者： zhang Xiao-hui zhang hai-ming LI Yu-Jie School of Science Tianjin Polytechnic UniversityTianjin300387China Physics Department Tianjin University Renai CollegeTianjin300072China

The opal photonic crystals(PCs) were assembled by vertical deposition of polystyrene microspheres(PS), in which Yb3+, Er3+ co-doped ZnO powders were deposited on the surface of PC films. The phase, structure and morphology of the obtained samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscope(TEM). The performance of up-conversion photoluminescence(UCPL) was investigated by fluorescence spectrophotometer. The up-conversion(UC) emission of Zn O:Yb3+/Er3+ on the PC surface is notably enhanced when the UC emission wavelength is overlapped with the photonic bandgaps of opals, which is attributed to Bragg reflection of photonic bandgap. The results show that PCs may have potential applications in the enhancement of UCPL and optoelectronic devices.

关键词： Er UC PC ZnO Enhancement of the up-conversion luminescence of ZnO:Yb

A Study of the Driving Force for Inclusion Complexation of α- and β- Cyclodextrin with Substituted Benzene

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Chemical Research in Chinese Universities 1999年第1期15卷 19-24页

作者： zhang hai-ming LUO Shuang-hui CHEN Chao LIU Lei GUO Qing-xiang LIU You-cheng Department of Chemistry University of Science and Technology of ChinaHefei230026 National Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou730000

The driving force for inclusion complexation of α and β CD with substituted benzene(PhX) was studied by means of step wise regression analysis. A set of multiple regression equations was established with correlation coefficients 0 96 and 0 94 for the individual complexation of α CD and β CD with PhX. The ln K a(calc.) values calculated with the aid of the regression equations were close to those determined experimentally. The inclusion complexation is dominantly driven by van der Waals force and hydrophobic interactions.

关键词： Cyclodextrin Driving force Inclusion Regression Substituted benzene

Characteristics of LiCoO2, LiMn2O4 and LiNi0.45Co0.1Mn0.45O2 as cathodes of lithium ion batteries

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Journal of Central South University of Technology 2005年第z1期12卷 44-49页

作者： GUO Hua-jun LI Xin-hai zhang Xin-ming ZENG Su-ming WANG Zhi-xing PENG Wen-jie School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Materials Science and Engineering Central South University Changsha 410083 China School of Materials Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China School of Metallurgical Science and Engineering Central South University Changsha 410083 China

LiNi0. 45 Co0. 10 Mn0. 4sO2 was synthesized from Li2CO3 and a triple oxide of nickel, cobalt and manganese at 950 ℃ in air. The structures and characteristics of LiNi0. 45 Co0.10 Mn0. 45 O2, LiCoO2 and LiMn2 O4 were investigated by XRD, SEM and electrochemical measurements. The results show that LiNi0.4s Co0.10 Mn0. 45 O2 has a layered structure with hexagonal lattice. The commercial LicoO2 has sphere-like appearance and smooth surfaces, while the LiMn2 O4 and LiNi0.45 Co0. 10 Mn0. 45 O2 consist of cornered and uneven particles. LiNi0. 45 Co0.10 Mn0. 45 O2 has a large disLiMn2 O4 and LiCoO2, respectively. LiCoO2 and LiMn2 O4 have higher discharge voltage and better rate-capability than LiNi0. 45Co0.10 Mn0. 45 O2. All the three cathodes have excellent cycling performance with capacity retention of above 89.3 % at the 250th cycle. Batteries with LiMn2 O4 or LiNi0.45 Co0.10 Mn0. 45 O2 cathodes show better safety performance under abusive conditions than those with LiCoO2 cathodes.

关键词： lithium ion batteries cathode LiCoO2 LiMn2O4 LiNi0. 45 Co0. 10 Mn0. 45 O2

On-surface Synthesis of Graphene Nanoribbons

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Chinese Journal of Structural Chemistry 2020年第8期39卷 1377-1384,1357页

作者： TANG Yan-Ning SUN Ke-Wei LI Xue-Chao zhang hai-ming CHI Li-Feng Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China

On-surface synthesis never fails to fascinate chemists by producing new functional polymers which can hardly been prepared via traditional solution *** those newly prepared polymers,graphene nanoribbons(GNRs),featured with tunable band gap,have attracted substantial attention because they are considered as promising candidates for next generation carbon-based ***,we summarize the recent advances of GNRs prepared on single crystal surfaces with emphasis on the structural tuning and electronic properties of ***,critical developments toward the application of GNRs have also been reviewed including the mass fabrication and the performance of GNRs as field effect transistors.

关键词： graphene nanoribbons(GNRs) on-surface reactions scanning tunneling microscopy(STM) scanning tunneling spectroscopy(STS)

Angular Multiplexing Storage in Azo-polymerLiquid Crystal Films Using Shearing Interferometer of Double-frequency Grating

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Chinese Journal of Lasers 2002年第2期11卷 43-46页

作者： zhang Jiangying ming hai WANG Pei WU Yunxia XIE Jianpingzhang Qijin LIU JianDepartment of Physics, Department of Materials, University of Science and Technology of China , Hefei 230026, China Department of Physics University of Science and Technology of China Hefei 230026 Department of Materials University of Science and Technology of China Hefei 230026

In this paper, the shearing interferometer of a double-frequency grating (DFG) and a small compact Nd: YVO4 double frequency laser at 532 nm are used to study the multiple storage in azo-polymer liquid crystal (PLC) films. In a principle experiment, the angle-encoded multiple gratings are recorded and the experimental results give triplex gratings at the same region in azo-PLC films, the angle between two adjacent grating vectors being 45°. Compared to the two-beam interferometer and four-wave mixing method, this method has simple configuration, high fringe contrast and quake-proof. A compatible angular multiplexing storage system in azo-PLC films is proposed.

关键词： shearing interferometer double-frequency grating angular multiplexing storage azo-polymer liquid crystal films

A special recurrent pattern in small hepatocellular carcinoma after treatment:Bile duct tumor thrombus formation

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World Journal of Gastroenterology 2011年第43期17卷 4817-4824页

作者： Qing-Yu Liu Dong-ming Lai Chao Liu Lei zhang Wei-Dong zhang hai-Gang Li ming Gao Department of Radiology Sun Yatsen Memorial Hospital Sun Yat-sen University Guangzhou 510120 Guangdong Province China

AIM:To investigate the clinicopathologic features of bile duct tumor thrombus(BDTT) occurrence after treatment of primary small hepatocellular carcinoma(sHCC) .METHODS:A total of 423 patients with primary sHCC admitted to our hospital underwent surgical resection or local *** follow-up,only six patients were hospitalized due to obstructive jaundice,which occurred 5-76 mo after initial *** clinicopathologic features of these six patients were ***:Six patients underwent hepatic resection(n=5) or radio-frequency ablation(n=1) due to primary *** cases had an R1 resection margin,and one case had an ablative margin less than 5.0 *** vascular infiltration,microsatellites or bile duct/canaliculus affection was noted in the initial resected *** the follow-up,imaging studies revealed a macroscopic BDTT extending to the common bile duct in all six *** patients had a concomitant intrahepatic recurrent *** re-resection of intrahepatic recurrent tumors and removal of BDTTs(n=4) ,BDTT removal through choledochotomy(n= 1) ,and conservative treatment(n=1) was *** portal vein invasion was noted in three of the four resected *** six patients died,with a mean survival of 11 mo after BDTT removal or conservative ***:BDTT occurrence is a rare,special recurrent pattern of primary *** with BDTTs extending to the common bile duct usually have an unfavorable prognosis even following aggressive *** resection or ablative margins against primary sHCC may be a risk factor for BDTT development.

关键词： Small hepatocellular carcinoma Recurrence Bile ducts Jaundice Diagnosis