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New Discovery of Red Paleosols with Calcite and Zeolitic Rhizoliths in the Late Cretaceous Yaojia Formation, Southern Songliao Basin,NE China

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2462-2463页

作者： zhang Li BAO Zhidong DOU Luxing WANG Hongjun JI yu State Key Laboratory of Petroleum Resource and Prospecting Beijing 102249China College of Geosciences China University of Petroleum-BeijingBeijing 102249China Oil Production Plant 5 of PetroChina Changqing Oilfield Company Xi'an 710021China Exploration and Development Institute of PetroChina Jilin Oilfield Company Songyuan 138000JilinChina

Objective Paleosols in terrestrial deposits provide important insight into paleoclimate and tectonic events(Gong Hujun et al., 2017). The Late Cretaceous continental red bed in the Songliao Basin of NE China records the paleoclimate characteristics during the Cretaceous greenhouse period. A series of data has been obtained from cores in continental scientific drilling wells(Wang, 2013). However, few investigations have reported on paleoclimatic and tectonic

关键词： NE China Southern Songliao Basin

Characteristics and Metallurgical Effects of Medium Basicity Refining Slag on Low Melting Temperature Inclusions

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Journal of Iron and Steel Research International 2015年第7期22卷 573-581页

作者： Hui-xiang yu Xin-hua WANG Jing zhang Wan-jun WANG School of Metallurgical and Ecological Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Wide Plate and Coil Plant Nanjing Iron and Steel Co.Ltd.

Recently, large sized CaO-Alz 03 inclusions with low melting temperature have been the main reason for lowering mechanical properties of high strength low alloy （HSLA） steel plates. New philosophy, i.e. refining by top slag with relatively low basicity and Al2O3 content, was proposed to control such kind of inclusions. Firstly, the characteristics of refining slag, such as component activities and sulphide capacity （Cs） of CaO-Al2O3-SiO2-MgO slag, were studied through thermodynamic calculation. Then, slag-metal equilibrium experiments were carried out in laboratory to investigate the exact chemical composition of refining slag together with thermodynamic analysis. Finally, industrial trials were done to verify the desulphurization ability and inclusions control in steel refined by the new slag. Thermodynamic calculations indicated that the slags with basicity of 3.5 and Al2O3 content of 200/oo and basicity of 5.0 and Al2O3 content of 20 % or 25 % have high values of CaO activity, sulphide capacity and ratio of MgO activity to Al2O3 activity. Laboratory equilibrium experiments showed that the slag with basicity of about 4.5 and A12 03 content of about 20% is helpful for increasing the melting temperature of inclusions in steel. After introducing such kind of refining slag in industrial trials, the sulphur content in eight heats of steel is below 20 ×l0-6 , which meets the requirement of HSLA steel, and most inclusions distribute in relatively high melting zone （≥1773 K） of CaO- Al2O3-MgO（-SiO2） quasi-ternary diagram. New philosophy of top refining slag is feasible to control low melting point inclusions of CaO-Al2O3 system in HSLA steel.

关键词： refining slag desulphurization ability inelusion thermodynamic calculation slag-metal reaction

Effects of aging process on adsorption–desorption and bioavailability of fomesafen in an agricultural soil amended with rice hull biochar

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Journal of Environmental Sciences 2017年第6期29卷 180-191页

作者： Mahdi Safaei Khorram Dunli Lin Qian zhang yuan Zheng Hua Fang yunlong yu Department of Environmental Science Faculty of Environment and Labour SafetyTon Duc Thang UniversityNo.19Nguyen Huu Tho StreetTan Phong WardDistrict 7Ho Chi Mirth CityVietnam Institute of Pesticide and Environmental Toxicology College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China

Biochar has been introduced as an acceptable soil amendment due to its environmental benefits such as sequestering soil contaminants. However, the aging process in biochar amended soil probably decreases the adsorption capacity of biochar through changing its physico-chemical properties. Adsorption, leaching and bioavailability of fomesafen to corn in a Chinese soil amended by rice hull biochar after 0, 30, 90 and 180 days were investigated. Results showed that the addition of 0.5%-2% fresh biochar significantly increases the adsorption of fomesafen 4-26 times compare to unamended soil due to higher SSA of biochar. Biochar amendment also decreases fomesafen concentration in soil pore water by 5%-23% resulting lower risk of the herbicide for cultivated plants. However, the aging process decreased the adsorption capacity ofbiochar since the adsorption coefficient values which was 1.9-12.4 in 0.5%-2% fresh biochar amended soil, declined to 1.36-4.16, 1.13-2.78 and 0.95-2.31 in 1, 3 and 6-month aged treatments, respectively. Consequently, higher desorption, leaching and bioavailable fraction of fomesafen belonged to 6-month aged treatment. Nevertheless, rice hull biochar was effective for sequestering fomesafen as the adsorption capacity of biochar amended soil after 6 months of aging was still 2.5-5 times hi^her compared to that of unamended soil.

关键词： Adsorption Aging process Bioavailability Fomesafen Leaching

Modeling Climate Change Impacts on the US Agricultural Exports

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Journal of Integrative Agriculture 2014年第4期13卷 666-676页

作者： zhang yu-quan CAI Yong-xia Beach Robert H McCARL Bruce A Agricultural Resource & Energy Economics and Policy ProgramRTI InternationalResearch Triangle Park Department of Agricultural Economics Texas A&M UniversityCollege Station

Climate change is expected to have substantial effects on agricultural productivity worldwide. However, these impacts will differ across commodities, locations and time periods. As a result, landowners will see changes in relative returns that are likely to induce modifications in production practices and land allocation. In addition, regional variations in impacts can alter relative competitiveness across countries and lead to adjustments in international trade patterns. Thus in climate change impact studies it is likely useful to account for worldwide productivity effects. In this study, we investigate the implications of considering rest of world climate impacts on projections of the US agricultural exports. We chose to focus on the US because it is one of the largest agricultural exporters. To conduct our analyses, we consider four alternative climate scenarios, both with and without rest of world climate change impacts. Our results show that considering/ignoring rest of world climate impacts causes significant changes in the US production and exports projections. Thus we feel climate change impact studies should account not only for climate impacts in the country of focus but also on productivity in the rest of the world in order to capture effects on commodity markets and trade potential.

关键词： climate change relative competitiveness trade agricultural sector model (ASM)

Thermodynamic cycle analysis of solid propellant air-turbo-rocket

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航空动力学报 2009年第2期24卷 269-276页

作者： CHEN Xiang CHEN yu-chun TU Qiu-ye zhang Hong CAI yuan-hu School of Power and Energy Northwestern Polytechnical University Xi'an 710072 China

Solid propellant air-turbo-rocket(SPATR) is an air-breathing propulsion system.A numerical model of performance and characteristics analysis for SPATR was presented and the corresponding computer program was written according to the operation characteristics of *** influence on the SPATR performance at design point caused by the gas generator exit parameters and compressor pressure ratio had been computed and analyzed in *** off-design performance of SPATR at sea level and high altitude had also been *** performance of thrust and specific impulse for SPATR with different solid propellant had been compared at off-design points,and the off-design performance comparison had been made between fuel-rich and *** computation results indicated that SPATR operates within wide range of Mach number(0~3) and altitude(0~12 km),and SPATR possesses high specific thrust(1 200 N/(kg/s)) and high specific impulse(7 000 N/(kg/s)) when fuel-air ratio of combustor equals fuel-air ratio.

关键词：空气涡轮火箭压缩机压力固体推进剂设计方案

WACPN:A Neural Network for Pneumonia Diagnosis

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Computer Systems Science & Engineering 2023年第4期45卷 21-34页

作者： Shui-Hua Wang Muhammad Attique Khan Ziquan Zhu yu-Dong zhang School of Computing and Mathematical Sciences University of LeicesterLeicesterLE17RHUK Department of Computer Science HITEC University TaxilaTaxilaPakistan

Community-acquired pneumonia(CAP)is considered a sort of pneumonia developed outside hospitals and *** diagnose community-acquired pneumonia(CAP)more efficiently,we proposed a novel neural network *** introduce the 2-dimensional wavelet entropy(2d-WE)layer and an adaptive chaotic particle swarm optimization(ACP)algorithm to train the feed-forward neural *** ACP uses adaptive inertia weight factor(AIWF)and Rossler attractor(RA)to improve the performance of standard particle swarm *** final combined model is named WE-layer ACP-based network(WACPN),which attains a sensitivity of 91.87±1.37%,a specificity of 90.70±1.19%,a precision of 91.01±1.12%,an accuracy of 91.29±1.09%,F1 score of 91.43±1.09%,an MCC of 82.59±2.19%,and an FMI of 91.44±1.09%.The AUC of this WACPN model is *** find that the maximum deposition level chosen as four can obtain the best *** demonstrate the effectiveness of both AIWF and ***,this proposed WACPN is efficient in diagnosing CAP and superior to six state-of-the-art *** model will be distributed to the cloud computing environment.

关键词： Wavelet entropy community-acquired pneumonia neural network adaptive inertia weight factor rossler attractor particle swarm optimization

Several Rules for Treating Phenol Wastewater via Oxidation by O_3/UV-formed Radicals

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Chemical Research in Chinese Universities 2006年第1期22卷 25-28页

作者： LIU Miao JIAO Xin-qian WU Di DIAO Wei-li zhang yu College of Environment and Resources Jilin University Changchun 130012 P. R China

The treatment of phenol wastewater with an ultraviolet source and an oxone generator by introducing salicylic acid as the capturer is described. The presence of HO during the phenol degradation has been proved. The impacts of factors such as acidity and reaction time on the HO formation are also discussed. The results demonstrate that HO ＇ generated from ozone/UV oxidation under a basic condition is the immediate cause of phenol degradation. At room temperature and a pH value of 9. 93, the degradation of phenol occurs rapidly within 0. 5 rain and the removal of phe- nol（ 100 mg/L） is above 98. 5% within 15 min; in the meantime, the pH value declines gradually with the degradation of phenol. A discussion about the formation and the transformation of the intermediate products during phenol degradation is included.

关键词： Ozone UV oxidation Radical Phenol wastewater Degradation

Holocene Climate Cycles in Northwest Margin of Asian Monsoon

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Chinese Geographical Science 2012年第4期22卷 450-461页

作者： LI yu WANG Nai'ang LI Zhuolun ZHOU Xuehua zhang Chengqi College of Earth and Environmental Sciences Center for Hydrologic Cycle and Water Resources in Arid RegionLanzhou UniversityLanzhou 730000China

In the mid-latitude regions of the Asian continent, Zhuye Lake is located in the northwest margin of the Asian monsoon, where the modem climate is affected by the Asian monsoon and Westerlies. In this study, we investi- gated the absolutely dated Holocene records in Zhuye Lake for detecting the Holocene climate cycles. Totally, 14 14C dates and 6 optically simulated luminescence （OSL） dates are obtained from the QTH01 and QTH02 sections. The proxies of grain-size, total organic carbon content （TOC）, C/N and 813C are used for wavelet analysis, and the results show obvious -256, -512 and -1024-year climate cycles, which are consistent with the Holocene millennial and cen- tennial scale climate cycles in the typical Asian summer monsoon domain. In different parts of the Zhuye Lake, the Holocene sediments show variable climate cycles that are affected by the lake basin topography. In the Zhuye Lake, the Holocene climate cycles are mainly correlated with the solar-related Asian summer monsoon variability and the North Atlantic ice-rafting events.

关键词： Holocene climate cycle Asian monsoon wavelet analysis Zhuye Lake

Overlapping community detection combining content and link

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第11期13卷 828-839页

作者： Zhou-zhou HE Zhong-fei(Mark)zhang Philip S.yu Zhejiang Provincial Key Laboratory of Information Network Technology Department of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China Department of Computer Science University of Illinois at ChicagoIL 60607USA

In classic community detection, it is assumed that communities are exclusive, in the sense of either soft clustering or hard clustering. It has come to attention in the recent literature that many real-world problems violate this assumption, and thus overlapping community detection has become a hot research topic. The existing work on this topic uses either content or link information, but not both of them. In this paper, we deal with the issue of overlapping community detection by combining content and link information. We develop an effective solution called subgraph overlapping clustering (SOC) and evaluate this new approach in comparison with several peer methods in the literature that use either content or link information. The evaluations demonstrate the effectiveness and promise of SOC in dealing with large scale real datasets.

关键词： Overlapping Content Link Community detection