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“中气法”针刺治疗糖尿病胃轻瘫临床研究 被引量:4
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作者 吴名 徐海环 +1 位作者 张蒙 王定寅 《中医学报》 CAS 2015年第11期1598-1599,共2页
目的:观察"中气法"针刺治疗糖尿病胃轻瘫(diabetic gastroparesis,DGP)的临床疗效,寻找治疗DGP的最佳配穴。方法:120例患者,随机分为治疗组、对照组各60例。对照组给予口服多潘立酮(吗丁啉)治疗,治疗组在对照组的基础上加用&q... 目的:观察"中气法"针刺治疗糖尿病胃轻瘫(diabetic gastroparesis,DGP)的临床疗效,寻找治疗DGP的最佳配穴。方法:120例患者,随机分为治疗组、对照组各60例。对照组给予口服多潘立酮(吗丁啉)治疗,治疗组在对照组的基础上加用"中气法"针刺治疗,7 d为1个疗程,连续治疗4个疗程后评定疗效。结果:治疗组有效率为93.33%,对照组为71.67%,治疗组明显优于对照组(P<0.05)。结论:"中气法"针刺治疗DGP疗效显著。 展开更多
关键词 糖尿病胃轻瘫 “中气法” 针刺 多潘立酮
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“中气法”针刺治疗糖尿病胃轻瘫 被引量:3
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作者 吴名 徐海环 +1 位作者 张蒙 王定寅 《中医学报》 CAS 2015年第4期493-494,共2页
中气法是指将补益中气的组穴通过现代数学的对角线原理和中线原理分成两组穴位交替使用以加强治疗效果的治疗方法。中气法I由巨阙、中脘、下脘、梁门组成。中气法II由中脘、不容、太乙组成。无论是中气法I还是中气法II都是在胃的投影区... 中气法是指将补益中气的组穴通过现代数学的对角线原理和中线原理分成两组穴位交替使用以加强治疗效果的治疗方法。中气法I由巨阙、中脘、下脘、梁门组成。中气法II由中脘、不容、太乙组成。无论是中气法I还是中气法II都是在胃的投影区,可交替使用。两组穴中中脘穴为主穴。中脘乃属任脉,既是胃募,又是八会穴之腑会,是治疗各种胃肠疾病的中坚。 展开更多
关键词 糖尿病 胃轻瘫 “中气法”针刺 中脘穴
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Improving the Seasonal Forecast of Summer Precipitation in China Using a Dynamical-Statistical Approach 被引量:3
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作者 JIA Xiao-Jing ZHU Pei-Jun 《Atmospheric and Oceanic Science Letters》 2010年第2期100-105,共6页
A dynamical-statistical post-processing approach is applied to seasonal precipitation forecasts in China during the summer.The data are ensemble-mean seasonal forecasts in summer (June August) from four atmospheric ge... A dynamical-statistical post-processing approach is applied to seasonal precipitation forecasts in China during the summer.The data are ensemble-mean seasonal forecasts in summer (June August) from four atmospheric general circulation models (GCMs) in the second phase of the Canadian Historical Forecasting Project (HFP2) from 1969 to 2001.This dynamical-statistical approach is designed based on the relationship between the 500 geopotential height (Z500) forecast and the observed sea surface temperature (SST) to calibrate the precipitation forecasts.The results show that the post-processing can improve summer precipitation forecasts for many areas in China.Further examination shows that this post-processing approach is very effective in reducing the model-dependent part of the errors,which are associated with GCMs.The possible mechanisms behind the forecast's improvements are investigated. 展开更多
关键词 precipitation forecasts ensemble forecasts dynamical-statistical approach
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Healing Is Believing: Yeon Gaesomun and Xue Rengui in the Making of Mid-Seventh-Century Tang-Goguryeo War Narratives
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作者 YI Seokgu 《Journal of Literature and Art Studies》 2016年第1期10-16,共7页
This paper examines how historical narratives and fictional narratives treat China's loss in Tang-Goguryeo War differently to heal China's damaged pride. Emperor Tang Taizong (599-649) invaded Goguryeo in 645 but ... This paper examines how historical narratives and fictional narratives treat China's loss in Tang-Goguryeo War differently to heal China's damaged pride. Emperor Tang Taizong (599-649) invaded Goguryeo in 645 but failed to conquer her because of severe weather and strong resistance led by Yeon Gaesomun (603-666). This paper argues that official histories including Jiu Tangshu (Old Book of Tang) and Xin Tangshu (New Book of Tang) focus on Emperor Tang Taizhong's legitimacy to invade Goguryeo because Yeon Gaesomun's coup d'etat overthrew Yeongnyu-wang. These two histories also pay extra attention to Yeon Gaesomun's negative characters. Novels about Tang-Goguryeo War including Xue Rengui zheng Liao shi lue (薛仁贵徵辽事略), Tang shu zhi zhuan tong su yan yi (唐书志传通俗演义), and Shuo Tang hou zhuan (说唐后传) take a different approach to heal China's wounded pride. Instead of focusing on diplomatic and military legitimacy, these stories blur China's loss by creating a national hero Xue Rengui whose military skills, loyalty to Tang Dynasty, and dauntless rescue of Emperor Tang Taizong were constantly emphasized. 展开更多
关键词 Tang-Goguryeo War Yeon Gaesomun Xue Rengui historical narratives fictional narratives
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On the Law Right of the Gas Water of Water Resources
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作者 Liu Shujun 《Chinese Journal of Population,Resources and Environment》 北大核心 2007年第3期93-96,共4页
With the development of science and technology, the researches and application of water resources including the gas water have been constantly developed. Through an analysis on the flaws of the water right theory, and... With the development of science and technology, the researches and application of water resources including the gas water have been constantly developed. Through an analysis on the flaws of the water right theory, and by executing reconstruction and renewal of the theory and system of water right in modem society, the water right position of the gas water will be established, leading to the maturity of the whole law effectiveness and substantial results of water right. 展开更多
关键词 water resources gas water water law water rightproblems
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Advance in Application of Regional Climate Models in China
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作者 ZHANG Wei YAN Minhua +1 位作者 CHEN Panqin XU Helan 《Chinese Geographical Science》 SCIE CSCD 2008年第1期93-100,共8页
Regional climate models have become the powerful tools for simulating regional climate and its change process and have been widely used in China. Using regional climate models, some research results have been obtained... Regional climate models have become the powerful tools for simulating regional climate and its change process and have been widely used in China. Using regional climate models, some research results have been obtained on the following aspects: 1) the numerical simulation of East Asian monsoon climate, including exceptional monsoon precipitation, summer precipitation distribution, East Asian circulation, multi-year climate average condition, summer rain belt and so on; 2) the simulation of arid climate of the western China, including thermal effect of the Qinghal-Tibet Plateau, the plateau precipitation in the Qilian Mountains; and the impacts of greenhouse effects (CO2 doubling) upon climate in the western China; and 3) the simulation of the climate effect of underlying surface changes, including the effect of soil on climate formation, the influence of terrain on precipitation, the effect of regional soil degradation on regional climate, the effect of various underlying surfaces on regional climate, the effect of land-sea contrast on the climate formulation, the influence of snow cover over the plateau regions on the regional climate, the effect of vegetation changes on the regional climate, etc. In the process of application of regional climate models, the preferences of the models are improved so that better simulation results are gotten. At last, some suggestions are made about the application of regional climate models in regional climate research in the future. 展开更多
关键词 regional climate model model application research advance China
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CLINICAL APPLICATION OF ACUPUNCTURE ON ALLEVIATION OF STRESS REACTION INDUCED BY TRACHEAL INTUBATION IN GENERAL ANESTHESIA
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作者 时金华 《World Journal of Acupuncture-Moxibustion》 2006年第2期43-48,共6页
By summarizing the formation of stress reaction induced by tracheal intubation and method of medicinal control, the recognition of Chinese medicine in treatment of cardiac arrhythmia and hypertension with acupuncture ... By summarizing the formation of stress reaction induced by tracheal intubation and method of medicinal control, the recognition of Chinese medicine in treatment of cardiac arrhythmia and hypertension with acupuncture and the clinical application of acupuncture on stress reaction induced by tracheal intubation, it is concluded that the side effects of tracheal intubation are inevitable, even though there are many methods presented for the prevention and treatment for it. In recent years, the functions of acupuncture in anesthesia, especially in regulation of circulatory properties have been developed gradually and have been applied by many physicians in controlling the stress reaction induced by tracheal intubation in general anesthesia. Being a kind of dual-directional and positive regulation and stimulation, acupuncture provides definite and safe effects on controlling the stress reaction induced by tracheal intubation. 展开更多
关键词 Acupuncture Medicine Stress reaction Tracheal intubation
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Vulnerability of Water Resources and Its Spatial Heterogeneity in Haihe River Basin, China 被引量:10
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作者 XIA Jun CHEN Junxu +3 位作者 WENG Jianwu YU Lei QI Junyu LIAO Qiang 《Chinese Geographical Science》 SCIE CSCD 2014年第5期525-539,共15页
To manage water resources effectively, a multiscale assessment of the vulnerability of water resources on the basis of political boundaries and watersheds is necessary. This study addressed issues on the vulnerability... To manage water resources effectively, a multiscale assessment of the vulnerability of water resources on the basis of political boundaries and watersheds is necessary. This study addressed issues on the vulnerability of water resources and provided a multiscale comparison of spatial heterogeneity under a climate change background. Using improved quantitative evaluation methods of vulnerabil- ity, the Theil index and the Shannon-Weaver index, we evaluated the vulnerability of water resources and its spatial heterogeneity in the Haihe River Basin in four scales, namely, second-class water resource regions (Class II WRRs), third-class water resource regions (Class III WRRs), Province-Class II WRRs, and Province-Class III WRRs. Results show that vulnerability enhances from the north to south in the different scales, and shows obvious spatial heterogeneity instead of moving toward convergence in multiscale assessment results. Among the Class II WRRs, the Tuhai-Majia River is the most vulnerable area, and the vulnerability of the Luanhe River is lower than that of the north of the Haihe River Basin, which in turn is lower than that of the south of the Haihe River Basin. In the scales of Class III WRRs and Province-Class III WRRs, the vulnerability shows obvious spatial heterogeneity and diversity measured by the Theil index and the Shannon-Weaver index. Multiscale vulnerability assessment results based on political boundaries and the watersheds of the Haihe River Basin innovatively provided in this paper are important and useful to characterize the real spatial pattern of the vulnerability of water resources and improve water resource management. 展开更多
关键词 water resource vulnerability assessment Theil index Shannon-Weaver index spatial heterogeneity Haihe River Basin
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Clinical Observation in 31 Cases of Chronic Bronchitis at Remission Stage Treated with Bufei Keli
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作者 刘杨春 王乃红 +3 位作者 王娜 刘冠萍 阎惠芳 段树民 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2003年第4期246-250,共5页
To observe the therapeutic effects of a Chinese drug Bufei Keli (补肺颗粒 granules for invigorating the lung) in the treatment of chronic bronchitis at remission stage, 62 cases were randomly divided into a treatment ... To observe the therapeutic effects of a Chinese drug Bufei Keli (补肺颗粒 granules for invigorating the lung) in the treatment of chronic bronchitis at remission stage, 62 cases were randomly divided into a treatment group (treated with Bufei Keli) and a control group (treated with Yupingfeng Keli 玉屏风颗粒). The results turned out to be that the short-term clinically controlled and markedly effective rate was 77.42% and the long-term relapse-resisting markedly effective rate was 74.2% in the treatment group, which were obviously higher than 45.16% and 38.71% respectively in the control group (P<0.05). And the increase in contents of SOD and CD_3 and the decrease in LPO content in the treatment group were also bigger than that in the control group (P<0.01). It is therefore concluded that Bufei Keli can improve qi deficiency syndrome and raise the immunity of patients with chronic bronchitis, hence its effect of resisting relapse of chronic bronchitis. 展开更多
关键词 PHYTOTHERAPY Adjuvants Immunologic Adult Aged Antigens CD3 Bronchitis Chronic CONVALESCENCE Drugs Chinese Herbal Female Humans Male Middle Aged Qi Yang Deficiency
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MEDICINAL VESICULATION THERAPY AND ITS CLINICAL APPLICATION
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作者 王伟 刘海静 孙占玲 《World Journal of Acupuncture-Moxibustion》 2002年第4期33-36,共4页
In this paper, the authors introduce medicinal vesiculation therapy from its origin, points for attention in clinical application, and their individual experiences. In clinical application, the authors advocate: ① av... In this paper, the authors introduce medicinal vesiculation therapy from its origin, points for attention in clinical application, and their individual experiences. In clinical application, the authors advocate: ① avoid using drugs that are over-irritating in the property, and strictly controlling the dose of drugs and the duration of application, ② in selection of drugs, some factors as patients’ conditions, the season, the geographic location, etc. should be taken into account. In the present paper, 3 typical cases of bronchial asthma, tonsil swelling and facial paralysis treated with medicinal vesiculation therapy are introduced. Clinical practice demonstrates that this therapy is economical, simple and convenient and fairly effective in treatment of some chronic diseases. 展开更多
关键词 Medicinal vesiculation therapy Clinical application
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Sino-French Cooperation in Oil and Gas Development
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作者 Wang Wei 《China Oil & Gas》 CAS 2016年第2期55-58,共4页
Them is a bright future for cooperation in oil & gas development in China. Total and other French companies strengthen communication and cooperation with Chinese partners to develop oil & gas in China as well as in ... Them is a bright future for cooperation in oil & gas development in China. Total and other French companies strengthen communication and cooperation with Chinese partners to develop oil & gas in China as well as in other countries. Chinese and French companies continue to benefit from cooperation in petroleum upstream industry, gas industry as well as in other fields. 展开更多
关键词 Sino-French PETROLEUM COOPERATION SUCCESS
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The control of coal mine gas and coordinated exploitation of coal bed methane in China 被引量:4
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作者 LIU Jian-zhong 《Journal of Coal Science & Engineering(China)》 2009年第3期267-272,共6页
Based on the characteristics of the coalfield geology and the distribution of coalbed methane (CBM) in China,the geological conditions for exploiting the CBM and drainingthe coal mine gas were analyzed,as well as the ... Based on the characteristics of the coalfield geology and the distribution of coalbed methane (CBM) in China,the geological conditions for exploiting the CBM and drainingthe coal mine gas were analyzed,as well as the characteristics of CBM production.Bycomparing the current situation of CBM exploitation in China with that in the United States,the current technology and characteristics of the CBM exploitation in China were summarizedand the major technical problems of coal mine gas control and CBM exploitationanalyzed.It was emphasized that the CBM exploitation in China should adopt the coalmine gas drainage method coordinated with coal mine exploitation as the main model.Itwas proposed that coal mine gas control should be coordinated with coal mine gas exploitation.The technical countermeasure should be integrating the exploitation of coal andCBM and draining gas before coal mining. 展开更多
关键词 control of coal mine gas coordinated exploitation coal bed methane technical countermeasures
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Spatial downscaling of climate variables using three statistical methods in Central Iran
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作者 Zahra JABERALANSAR Mostafa TARKESH Mehdi BASSIRI 《Journal of Mountain Science》 SCIE CSCD 2018年第3期606-617,共12页
Spatial downscaling methods are widely used for the production of bioclimatic variables(e.g. temperature and precipitation) in studies related to species ecological niche and drainage basin management and planning. Th... Spatial downscaling methods are widely used for the production of bioclimatic variables(e.g. temperature and precipitation) in studies related to species ecological niche and drainage basin management and planning. This study applied three different statistical methods, i.e. the moving window regression(MWR), nonparametric multiplicative regression(NPMR), and generalized linear model(GLM), to downscale the annual mean temperature(Bio1) and annual precipitation(Bio12) in central Iran from coarse scale(1 km × 1 km) to fine scale(250 m ×250 m). Elevation, aspect, distance from sea and normalized difference vegetation index(NDVI) were used as covariates to create downscaled bioclimatic variables. Model assessment was performed by comparing model outcomes with observational data from weather stations. Coefficients of determination(R2), bias, and root-mean-square error(RMSE) were used to evaluate models and covariates. The elevation could effectively justify the changes in bioclimatic factors related to temperature and precipitation. Allthree models could downscale the mean annual temperature data with similar R2, RMSE, and bias values. The MWR had the best performance and highest accuracy in downscaling annual precipitation(R2=0.70; RMSE=123.44). In general, the two nonparametric models, i.e. MWR and NPMR, can be reliably used for the downscaling of bioclimatic variables which have wide applications in species distribution modeling. 展开更多
关键词 Statistical models Climatic data ELEVATION Spatial resolution Temperature PRECIPITATION
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TCM Treatment of Interstitial Pneumonia with Chronic Cough—A Case Report
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作者 陈景河 陈素玉 +2 位作者 陈素云 陈知行 毛树章 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2003年第3期170-171,共2页
Ms. Wang, a writer of 60 years old. Because of hard work and lack of rest, since the Spring Festival 2000,she was gradually caught by cough.
关键词 PHYTOTHERAPY COUGH Drugs Chinese Herbal Humans Lung Diseases Interstitial MALE Middle Aged
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Efficacy evaluation of acupuncture plus rehabilitation training for post-stroke deglutition disorders of qi-deficiency blood stasis pattern 被引量:3
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作者 Huang Yi-qing Ma Wen Shen Wei-dong 《Journal of Acupuncture and Tuina Science》 CSCD 2020年第5期367-373,共7页
Objective:To observe the clinical efficacy of acupuncture plus rehabilitation training in treating post-stroke deglutition disorders of qi-deficiency blood stasis pattern.Methods:Sixty-six patients with post-stroke de... Objective:To observe the clinical efficacy of acupuncture plus rehabilitation training in treating post-stroke deglutition disorders of qi-deficiency blood stasis pattern.Methods:Sixty-six patients with post-stroke deglutition disorders of qi-deficiency blood stasis patter were divided into an observation group and a rehabilitation group using the random number table method.The two groups both received conventional medications and supportive treatment for stroke.In addition,the observation group received acupuncture plus rehabilitation training while the rehabilitation group only received the same rehabilitation training.The interventions were conducted 3 times a week for a total of 4 weeks in both groups.They were evaluated using Kubota water swallowing test(KWST),Fujishima Ichiro food intake level scale(FILS)and symptoms score of traditional Chinese medicine(TCM)before and after treatment,and at the 1-month follow-up.The therapeutic efficacy was assessed at the 1-month follow-up.Results:The KWST grading and FILS result after treatment and at the follow-up were significantly different from those before treatment in both groups(all P<0.001);the results of these two items at the follow-up were not significantly different from those after treatment in the two groups(all P>0.05).There were significant differences in the KWST grading and FILS result between the two groups after treatment and at the follow-up(all P<0.05).The TCM symptoms score changed significantly after treatment and at the follow-up compared with that before treatment in both groups(all P<0.001).The TCM symptoms grading efficacy at the follow-up was significantly different from that after treatment in the observation group(P<0.05),while the difference was statistically insignificant in the rehabilitation group(P>0.05).The TCM symptoms grading efficacy in the observation group was significantly different from that in the rehabilitation group after treatment and at the follow-up(both P<0.05).Conclusion:Based on the conventional treatment for stroke,acupuncture plus rehabilitation training or use of rehabilitation training alone both can improve the clinical symptoms in post-stroke deglutition disorders of qi-deficiency blood stasis pattern,but acupuncture plus rehabilitation training can produce more significant efficacy and better long-term efficacy in improving TCM symptoms. 展开更多
关键词 Acupuncture Therapy Stroke Rehabilitation Qi-deficiency Blood Stasis Poststroke Syndrome Pseudobulbar Palsy Deglutition Disorders
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Treatment of Retinochorioiditis Caused by Toxoplasmosis with Traditional Symptom-related Acupuncture and Chronoacupuncture/Zi Wu Liu Zhu.A Case Study 被引量:2
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作者 Slopek,Axel FENGHai-tao +1 位作者 Fanselow-Hinrichs,Gisela WANGRui-hua 《Journal of Acupuncture and Tuina Science》 2005年第1期57-60,共4页
Object: To show that increased and invigorated movement of qi and bloodwithin the organism and their concentration in the diseased organ is crucial for acupuncture andlimitations for acupuncture based upon Western med... Object: To show that increased and invigorated movement of qi and bloodwithin the organism and their concentration in the diseased organ is crucial for acupuncture andlimitations for acupuncture based upon Western medicine are not necessarily adequate. Methods:Symptom-related and chronoacupuncture were used within a five stages acupuncture beginning withneedling of competent pair of confluent points and followed by Zi Wu Liu Zhu chronoacupuncture.Results: After 58 symptom-related acupuncture treatments the vision increased from 10 to 70 percentand remained stable. 18 months later one Zi Wu Liu Zhu chronoacupuncture was carried out following aneedling concept of five stages. Within one hour the vision increased from 70 to 90 percent.Conclusions: Ophthalmologists should offer acupuncture to patients suffering from eye in-flammationsand retina scars. Acupuncturists should use Zi Wu Liu Zhu and powerful acupoints and acupointcombinations in order to invigorate and to move qi and blood strongly. This case shows theeffectiveness of acupuncture and chronoacupuncture in a case of retina scar caused by toxoplasmosis.Therefore, acupuncture treatment might be successfully applied in diseases where Western medicinecannot offer help. 展开更多
关键词 Zi Wu Liu Zhu RETINITIS acupuncture therapy
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Effect of moxa smoke produced during combustion of Aiye(Folium Artemisiae Argyi) on behavioral changes in mice inhaling the smoke 被引量:12
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作者 Yang Jia Zheng Xiaojun +10 位作者 Jin Ran Han Li Ha Lue Li Jun Wang Lei Liu Ping Chu Zhusheng Huang Chang Chang Hongsheng Lao Lixing Zhao Baixiao 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2016年第6期805-811,共7页
OBJECTIVE: To evaluate the effects that inhalation of the combustion products of the traditional Chinese herb Aiye(Folium Artemisiae Argyi) has on the central nervous system.METHODS: Forty Kunming mice(half male) were... OBJECTIVE: To evaluate the effects that inhalation of the combustion products of the traditional Chinese herb Aiye(Folium Artemisiae Argyi) has on the central nervous system.METHODS: Forty Kunming mice(half male) were randomly assigned(n = 10/group) to a control group(C) or one of three moxa smoke concentration groups(% opacity): low(L1; 0.4%), medium(M1; 2%), and high(H1; 15%). Mice in the latter three groups were exposed to moxa smoke in a dynamic gas exposure cabinet for 20 min per day for7 days. Mice in control group were placed in the same cabinet without any intervention. For the sleep experiments, another 50 mice were divided into five groups of 10 mice each: a saline-injected control group, L1 + pentobarbital sodium(PS)-injected group, M1+PS group, H1(15%)+PS group,and a positive control group(10 mg/kg, chlorpromazine, p.o.). The weight, general activities, locomotor activities, rotarod performance, sleep duration,and sleeping rate induced by a subthreshold dose of pentobarbital sodium were recorded in the mice,and the composition of moxa smoke was analyzed using headspace gas chromatography(GC-HS).RESULTS: A low concentration of smoke significantly decreased the frequency of locomotor activities and the time for which the mice remaining on the rotarod; however, a high smoke concentration significantly prolonged the pentobarbital-induced sleeping time and sleeping rate.CONCLUSION: The concentration-dependent relaxing effects of moxa smoke on the Central Nervous System(CNS) were confirmed. Moreover, GC-HS analysis showed that the component present in the highest concentration in moxa smoke was eucalyp-tol, an essential oil well recognized for its soothing effects on the CNS. This may therefore be accountable for the sedative effects of moxa smoke. 展开更多
关键词 Artemisia Argyi Moxa smoke Central nervous system INHALATION
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Analysis of XCO_2 retrieval sensitivity using simulated Chinese Carbon Satellite(TanSat) measurements 被引量:5
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作者 CAI ZhaoNan LIU Yi YANG DongXu 《Science China Earth Sciences》 SCIE EI CAS 2014年第8期1919-1928,共10页
We present a study on the retrieval sensitivity of the column-averaged dry-air mole fraction of CO2(XCO2) for the Chinese carbon dioxide observation satellite(TanSat) with a full physical forward model and the optimal... We present a study on the retrieval sensitivity of the column-averaged dry-air mole fraction of CO2(XCO2) for the Chinese carbon dioxide observation satellite(TanSat) with a full physical forward model and the optimal estimation technique. The forward model is based on the vector linearized discrete ordinate radiative transfer model(VLIDORT) and considers surface reflectance, gas absorption, and the scattering of air molecules, aerosol particles, and cloud particles. XCO2 retrieval errors from synthetic TanSat measurements show solar zenith angle(SZA), albedo dependence with values varying from 0.3 to 1 ppm for bright land surface in nadir mode and 2 to 8 ppm for dark surfaces like snow. The use of glint mode over dark oceans significantly improves the CO2 information retrieved. The aerosol type and profile are more important than the aerosol optical depth, and underestimation of aerosol plume height will introduce a bias of 1.5 ppm in XCO2. The systematic errors due to radiometric calibration are also estimated using a forward model simulation approach. 展开更多
关键词 TanSat retrieval sensitivity retrieval error simulation XCO2
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Tropical cyclone spiral band extraction and center locating by binary ant colony optimization 被引量:2
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作者 BAI QiuChan WEI Kun +3 位作者 JING ZhongLiang LI YuanXiang TUO HongYa LIU ChengGang 《Science China Earth Sciences》 SCIE EI CAS 2012年第2期332-346,共15页
Tropical cyclone (TC) center locating is crucial because it lays the foundation for TC forecasting. Locating TC centers, usually by manual means, continues to present many difficulties. Not least is the problem of inc... Tropical cyclone (TC) center locating is crucial because it lays the foundation for TC forecasting. Locating TC centers, usually by manual means, continues to present many difficulties. Not least is the problem of inconsistency between TC center locations forecast by different agencies. In this paper, an objective TC center locating scheme is developed, using infrared satellite images. We introduce a pattern-matching concept, which we illustrate using a spiral curve model. A spiral band model, based on a spiral band region, is designed to extract the spiral cloud-rain bands (SCRBs) of TCs. We propose corresponding criteria on which to score the fitting value of a candidate template defined by our models. In the proposed scheme, TC location is an optimization problem, solved by an ant colony optimization algorithm. In numerical experiments, a minimal mean distance error of 17.9 km is obtained when the scheme is tested against best-track data. The scheme is suitable for TCs with distinct SCRBs or symmetrical central dense overcast, and for TCs both with and without clear eyes. 展开更多
关键词 weather forecast tropical cyclones center locating spiral band model ant colony optimization
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A comparison of atmospheric CO_2 concentration GOSAT-based observations and model simulations 被引量:6
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作者 LEI LiPing GUAN XianHua +3 位作者 ZENG ZhaoCheng ZHANG Bing RU Fei BU Ran 《Science China Earth Sciences》 SCIE EI CAS 2014年第6期1393-1402,共10页
Satellite observations of atmospheric CO2 are able to truly capture the variation of global and regional CO2 concentration.The model simulations based on atmospheric transport models can also assess variations of atmo... Satellite observations of atmospheric CO2 are able to truly capture the variation of global and regional CO2 concentration.The model simulations based on atmospheric transport models can also assess variations of atmospheric CO2 concentrations in a continuous space and time,which is one of approaches for qualitatively and quantitatively studying the atmospheric transport mechanism and spatio-temporal variation of atmospheric CO2 in a global scale.Satellite observations and model simulations of CO2 offer us two different approaches to understand the atmospheric CO2.However,the difference between them has not been comprehensively compared and assessed for revealing the global and regional features of atmospheric CO2.In this study,we compared and assessed the spatio-temporal variation of atmospheric CO2 using two datasets of the column-averaged dry air mole fractions of atmospheric CO2(XCO2)in a year from June 2009 to May 2010,respectively from GOSAT retrievals(V02.xx)and from Goddard Earth Observing System-Chemistry(GEOS-Chem),which is a global 3-D chemistry transport model.In addition to the global comparison,we further compared and analyzed the difference of CO2 between the China land region and the United States(US)land region from two datasets,and demonstrated the reasonability and uncertainty of satellite observations and model simulations.The results show that the XCO2 retrieved from GOSAT is globally lower than GEOS-Chem model simulation by 2 ppm on average,which is close to the validation conclusion for GOSAT by ground measures.This difference of XCO2 between the two datasets,however,changes with the different regions.In China land region,the difference is large,from 0.6 to 5.6 ppm,whereas it is 1.6 to 3.7 ppm in the global land region and 1.4 to 2.7 ppm in the US land region.The goodness of fit test between the two datasets is 0.81 in the US land region,which is higher than that in the global land region(0.67)and China land region(0.68).The analysis results further indicate that the inconsistency of CO2concentration between satellite observations and model simulations in China is larger than that in the US and the globe.This inconsistency is related to the GOSAT retrieval error of CO2 caused by the interference among input parameters of satellite retrieval algorithm,and the uncertainty of driving parameters in GEOS-Chem model. 展开更多
关键词 GOSAT GEOS-CHEM atmospheric CO2 concentration INCONSISTENCY regional comparison
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