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基坑地下水控制质量管理

岩土工程学报 2014年第S2期36卷 291-293页

作者：瞿成松上海长凯岩土工程有限公司上海200070

基坑地下水控制是基坑降水工程施工和周边环境安全双指标监控。针对集水明排、轻型井点、喷射井点、疏干真空井、降压管井、回灌井和止水帷幕质量要求,在基坑工程勘察、设计、施工、运行和封井等阶段,阐述地下水控制及其与地下水相关的... 详细信息

基坑地下水控制是基坑降水工程施工和周边环境安全双指标监控。针对集水明排、轻型井点、喷射井点、疏干真空井、降压管井、回灌井和止水帷幕质量要求,在基坑工程勘察、设计、施工、运行和封井等阶段,阐述地下水控制及其与地下水相关的应急预案质量管理。

关键词：地下水控制勘察设计施工运行封井

A quasilinear Parabolic System with Nonlocal Sources and Weighted Nonlocal Boundary Conditions

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Journal of Mathematical Research and Exposition 2011年第5期31卷 761-769页

作者： cheng Yuan qu Rui Hong JI Si Ning ZHENG School of Mathematical Science Dalian University of Technology Liaoning 116024 P. R. China Geomathematics Key Laboratory of Sichuan Province Chengdu University of Technology Sichuan 610059 P. R. China

In this paper, we investigate the blow-up properties of a quasilinear reaction-diffusion system with nonlocal nonlinear sources and weighted nonlocal Dirichlet boundary conditions. The critical exponent is determined under various situations of the weight functions. It is observed that the boundary weight functions play an important role in determining the blow-up conditions. In addition, the blow-up rate estimate of non-global solutions for a class of weight functions is also obtained, which is found to be independent of nonlinear diffusion parameters m and n.

关键词： quasilinear parabolic system nonlocal boundary conditions critical exponent blow-up rate weight functions.

Identification and tissue distribution of odorant binding protein genes in Harmonia axyridis (Coleoptera:Coccinellidae)

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Journal of Integrative Agriculture 2021年第8期20卷 2204-2213页

作者： qu cheng WANG Ran CHE Wu-nan LI Feng-qi ZHAO Hai-peng WEI Yi-yun LUO Chen XUE Ming College of Plant Protection Shandong Agricultural UniversityTai’an 271018P.R.China Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China Department of Pesticide Sciences Shenyang Agricultural UniversityShenyang 110866P.R.China

The olfactory system of insects is crucial in modulating behaviors such as host seeking,mating,and *** proteins(OBPs)are involved in semiochemical *** recognize and bind odorants and transport them to odorant receptors located in olfactory *** axyridis(Coleoptera:Coccinellidae)is a widely used predacious biological control agent for many agricultural and forestry *** study identified 19 OBPs in *** based on the antennal and whole-body transcriptomes of adults and obtained all the full-length open reading frames,including 11‘Classic’OBPs,7‘Minus-C’OBPs and 1‘Plus-C’*** encoded 125 to 241 amino acid proteins with molecular weights ranging from 13.75 to 27.75 kDa and isoelectric points ranging from 4.15 to *** analyses were used to study the relationships between *** OBPs and OBPs from other species of *** real-time PCR(qPCR)analysis showed that HaxyOBP2,3,5,8,10,12,13,14,and 15 were highly expressed in antennae of both adult females and ***,HaxyOBP2,3,5,12,and 15 were more abundantly expressed in antennae than other body parts,while HaxyOBP13 and HaxyOBP14 were expressed predominantly,and at similar levels,in the head and *** other OBP genes were highly expressed in non-olfactory tissues including the thorax,abdomen,legs,and *** results provide valuable information for further study of *** olfaction,which may ultimately enhance its use as a biocontrol agent.

关键词： odorant-binding proteins Harmonia axyridis expression profile phylogenetic tree

Investigating the impact of air pollution on AMI and COPD hospital admissions in the coastal city of Qingdao,China

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Frontiers of Environmental Science & Engineering 2022年第5期16卷 13-25页

作者： Jiuli Yang Mingyang Liu qu cheng Lingyue Yang Xiaohui Sun Haidong Kan Yang Liu Michelle LBell Rohini Dasan Huiwang Gao Xiaohong Yao Yang Gao Key Laboratory of Marine Environmental Science and Ecology and Frontiers Science Center for Deep Ocean Multispheres and Earth System(Ministry of Education)Ocean University of Chinaand Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Department of Emergency Internal Medicine The Affiliated Hospital of Qingdao UniversityQingdao 266100China Division of Environmental Health Sciences School of Public HealthUniversity of CaliforniaBerkeleyBerkeleyCA 94720USA Department of Chronic Disease Prevention Qingdao Municipal Center for Disease Control&PreventionQingdao 266100China School of Public Health Key Laboratory of Public Health Safety of the Ministry of EducationFudan UniversityShanghai 200433China Department of Environmental Health Rollins School of Public HealthEmory UniversityAtlantaGA 30322USA School of the Environment Yale UniversityNew HavenCT 06511USA

Air pollution has been widely associated with adverse effects on the respiratory and cardiovascular *** investigated the relationship between acute myocardial infarction(AMI),chronic obstructive pulmonary disease(COPD)and air pollution exposure in the coastal city of Qingdao,*** pollution in this region is characterized by inland and oceanic transportation sources in addition to local *** examined the influence of PM_(2.5),PM_(10),NO_(2),SO_(2),CO and O_(3) concentrations on hospital admissions for AMI and COPD from October 1,2014,to September 30,2018,in Qingdao using a Poisson generalized additive model(GAM).We found that PM_(2.5),PM_(10),NO_(2),SO_(2) and CO exhibited a significant short-term(lag 1 day)association with AMI in the singlepollutant model among older adults(>65 years old)and females,especially during the cold season(October to March).In contrast,only NO2 and SO2 had clear cumulative lag associations with COPD admission for females and those over 65 years old at lag 01 and lag 03,*** the twopollutant model,the exposure-response relationship fitted by the two-pollutant model did not change *** findings indicated that there is an inflection point between the concentration of certain air pollutants and the hospital admissions of AMI and COPD even under the linear assumption,indicative of the benefits of reducing air pollution vary with pollution *** study has important implications for the development of policy for air pollution control in Qingdao and the public health benefits of reducing air pollution levels.

关键词： AMI COPD Air pollution exposure GAM

A Simple High-Performance Liquid Chromatography Method for the Assay of Flavonoids in Ginkgo biloba Leaves

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World Journal of Traditional Chinese Medicine 2021年第1期7卷 47-53页

作者： Dan-Dan Wu cheng qu Xin-Guang Liu Ping Li Wen Gao Hua Yang State Key Laboratory of Natural Medicines School of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing 210009China

Objective:Ginkgo biloba leaves,as an herbal medicine or dietary supplement,have been widely used *** this study,an integrated analytical method was established for the comprehensive analysis of flavonoids in *** *** and Methods:A practical chromatographic method combining high-performance liquid chromatography fingerprint analysis and quantitation was used to simultaneously determine 11 flavonoids(6 flavonol glycosides and 5 biflavones)in *** leaves from different ***:A total of 11 characteristic peaks were identified accurately,and the similarity of fingerprints ranged from 0.944 to *** validation revealed appropriate linearity(R^(2)≥0.9997),precision,repeatability,stability,and *** total contents of the six flavonol glycosides and five biflavones were within the range of 2.142-8.378 mg/g and 3.759-5.675 mg/g in 19 batches of samples,*** them,two coumaroyl flavonol glycosides were the predominant ***:In this study,a convenient and reliable approach was successfully employed for the comprehensive evaluation of flavonoids in *** leaves,which also provided a reference for its quality standard.

关键词： Ginkgo biloba leaves Flavonoids Flavonol glycosides HPLC Fingerprint

A SYSTEM DYNAMICS APPROACH FOR SUSTAINABLE DEVELOPMENT IN THE MIYUN RESERVOIR AREA, CHINA

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Chinese Geographical Science 2002年第2期12卷 157-165页

作者： SUN Yan feng,GUO Huai cheng,qu Guang yi(Center for Environmental Sciences,Peking University,Beijing 100871,P. R. China) Center for Environmental Sciences Peking University Beijing 100871 P. R. China

Miyun Reservoir was designated as the water source of Beijing City in 1982. Since that time, socio economic development in Miyun Area has been slowing due to the restriction of severe environmental standards. More and more attention from the public and government has been paid to the regional sustainable development. And an effective planning for the local society management system is urgently desired. In this study, a regional sustainable development system dynamics model, named MiyunSD, is developed for supporting this planning task. MiyunSD consists of dynamic simulation models that explicitly consider information feedback that governs interactions in the system. Such models are capable of simulating the system′s behavior and predicting its developing situation of the future. For the study case, interactions among a number of system components within a time frame of fifteen years are examined dynamically. Three planning alternatives are carefully considered. The base run is based on an assumption that the existing pattern of human activities will prevail in the entire planning horizon, and the other alternatives are based on previous and present planning studies. The different alternatives will get different system′s environmental and socio economic results. Through analyzing these dynamic results, local authorities may find an optimal way to realize the objectives that the regional environment will be well protected and at the same time the economy will be rapidly developed.

关键词： Miyun reservoir sustainable development model policy management system dynamics

Simultaneous detection of seven phenolic acids in Danshen injection using HPLC with ultraviolet detector

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第9期9卷 728-733页

作者： Jin-zhong XU, Jie SHEN, Yi-yu cheng, Hai-bin qu (Department of Chinese Medicine Science and Engineering, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China) Department of Chinese Medicine Science and Engineering College of Pharmaceutical Sciences Zhejiang University Hangzhou 310058 China.

A high-performance liquid chromatographic (HPLC) method with ultraviolet (UV) detector had been developed for simultaneous quantification of danshensu, protocatechuic aldehyde, caffeic acid, salvianolic acid D, rosmarinic acid, salvianolic acid B and salvianolic acid A in Danshen injection. According to the UV spectra of these components, three detection wavelengths have been selected as follows: 280 nm for danshensu and protocatechuic aldehyde, 326 nm for caffeic acid, salvianolic acid D and rosmarinic acid, 286 nm for salvianolic acid B and salvianolic acid A. The limit of detection (LOD) was improved to be in the range of 0.008~0.160 μg/ml. Moreover, excellent linear behavior over the investigated concentration range was observed, with R>0.999 for all the analytes.

关键词： High-performance liquid chromatography (HPLC) Danshen injection (DSI) Phenolic acids Multi-wavelengths quantification

EFFECT OF PROCESSING METHOD ON THE IMPACT STRENGTH OF POM/TPU/CaCO_3 TERNARY COMPOSITES

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Chinese Journal of Polymer Science 2005年第5期23卷 531-537页

作者： Xiao-ling Gao cheng qu Qin Zhang Rong-ni Du and Qiang Fu Department of Polymer Science & Materials,Sichuan University,State Key Laboratory of Polymer Materials Engineering,chengdu 610065,China Sichuan Univ Dept Polymer Sci & Mat State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China

Polyoxymethylene （POM）/elastomer/filler ternary composites were prepared, in which thermoplastic polyurethane （TPU） and inorganic filler, namely, CaCO3, were used to achieve balanced mechanical properties of POM. The dispersion and phase morphology of POM/elastomer/filler composites were found to depend largely on processing method, CaCO3 content in masterbatch and the filler size. Two processing methods were employed to prepare POM/elastomer/filler ternary composites. One is called the one-step method, in which elastomer and the filler directly melt blended with POM matrix. The other is called the two-step method, in which the elastomer and the filler were mixed to get masterbatch first, which was then melt blended with pure POM of different content. The effect of phase morphology and processing method on impact strength was investigated. It was found that the two-step method results in an increase in impact strength but not for the one-step method. Additionally, the impact strength of POM ternary composites decreases with the increase in the size of CaCO3 particles.

关键词： POM/TPU/CaCO3 composites Core-shell structure Impact strength.

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清前期汉中八旗驻防考实

清史研究 2021年第4期126卷 118-133页

作者：屈成中国人民大学清史研究所北京100872

汉中为川陕关隘,顺康两朝分别在征定西南途中、平定三藩之后,两度在此驻防八旗。后因战事结束、粮饷转运艰难、旗民矛盾以及防止满人汉化等原因而裁撤。雍乾时期,出于解决八旗生计的需要,清廷再度议设汉中驻防。但此时清廷开疆拓土的重... 详细信息

汉中为川陕关隘,顺康两朝分别在征定西南途中、平定三藩之后,两度在此驻防八旗。后因战事结束、粮饷转运艰难、旗民矛盾以及防止满人汉化等原因而裁撤。雍乾时期,出于解决八旗生计的需要,清廷再度议设汉中驻防。但此时清廷开疆拓土的重点转移至西北,汉中的政治地理区位重要性相对下降,汉中驻防计划最终搁浅。汉中八旗驻防的驻撤过程,说明乾隆朝以前八旗驻防制度仍处于调适阶段,也表明清廷八旗驻防的重点开始由内地转移至边疆,反映了清廷统一全国过程中国家政治地理空间的变化。

关键词：汉中八旗驻防汉化八旗生计驻防格局清前期