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魔鬼的恐惧亦是我们的恐惧——读双雪涛《预感》和《剧场》
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作者 李振 《作家》 北大核心 2019年第1期103-105,共3页
一个人硬生生地杵在那里,你很难对其视而不见,他在呼吸,在咳嗽,弄出种种响动,散发着烟气或者其他什么味道,他让周围的温度升高0.01度甚至更多。你不觉察,他还是杵在那里,也许这就是所谓存在,他是他的,与别人无关。而存在感就麻烦了,它... 一个人硬生生地杵在那里,你很难对其视而不见,他在呼吸,在咳嗽,弄出种种响动,散发着烟气或者其他什么味道,他让周围的温度升高0.01度甚至更多。你不觉察,他还是杵在那里,也许这就是所谓存在,他是他的,与别人无关。而存在感就麻烦了,它多多少少逼着人跟外界发生关联,微妙,哕唆,让人心生厌恶又不算不上什么罪过。双雪涛的新作《预感》和《剧场》是两篇很不一样的小说,一个面对的是天外来客,一个要架起摄像机拍下晨练的大爷大妈,这分明是天上与地下的距离,但二者之间似乎存在着某种若隐若现的勾联,仿佛一个莫名其妙的人突然闯到你面前,结果周遭一切都需要重新证明。 展开更多
关键词 《预感》 剧场 恐惧 魔鬼 摄像机 小说
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Future changes in precipitation and water availability over the Tibetan Plateau projected by CMIP6 models constrained by climate sensitivity 被引量:1
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作者 Hui Qiu Tianjun Zhou +3 位作者 Liwei Zou Jie Jiang Xiaolong Chen Shuai Hu 《Atmospheric and Oceanic Science Letters》 CSCD 2024年第5期40-46,共7页
Precipitation projections over the Tibetan Plateau(TP)show diversity among existing studies,partly due to model uncertainty.How to develop a reliable projection remains inconclusive.Here,based on the IPCC AR6–assesse... Precipitation projections over the Tibetan Plateau(TP)show diversity among existing studies,partly due to model uncertainty.How to develop a reliable projection remains inconclusive.Here,based on the IPCC AR6–assessed likely range of equilibrium climate sensitivity(ECS)and the climatological precipitation performance,the authors constrain the CMIP6(phase 6 of the Coupled Model Intercomparison Project)model projection of summer precipitation and water availability over the TP.The best estimates of precipitation changes are 0.24,0.25,and 0.45 mm d^(−1)(5.9%,6.1%,and 11.2%)under the Shared Socioeconomic Pathway(SSP)scenarios of SSP1–2.6,SSP2–4.5,and SSP5–8.5 from 2050–2099 relative to 1965–2014,respectively.The corresponding constrained projections of water availability measured by precipitation minus evaporation(P–E)are 0.10,0.09,and 0.22 mm d^(−1)(5.7%,4.9%,and 13.2%),respectively.The increase of precipitation and P–E projected by the high-ECS models,whose ECS values are higher than the upper limit of the likely range,are about 1.7 times larger than those estimated by constrained projections.Spatially,there is a larger increase in precipitation and P–E over the eastern TP,while the western part shows a relatively weak difference in precipitation and a drier trend in P–E.The wetter TP projected by the high-ECS models resulted from both an approximately 1.2–1.4 times stronger hydrological sensitivity and additional warming of 0.6℃–1.2℃ under all three scenarios during 2050–2099.This study emphasizes that selecting climate models with climate sensitivity within the likely range is crucial to reducing the uncertainty in the projection of TP precipitation and water availability changes. 展开更多
关键词 Tibetan plateau Climate sensitivity Precipitation projection Water availability projection
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滕刚的意义 被引量:1
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作者 卢翎 《小说评论》 北大核心 2005年第5期65-69,共5页
关键词 微型小说 滕刚 写作技巧 构思 《预感》 当代文学研究 中国
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Prediction of rock burst classification using cloud model with entropy weight 被引量:29
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作者 周科平 林允 +2 位作者 邓红卫 李杰林 刘传举 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第7期1995-2002,共8页
The method of cloud model with entropy weight was adopted for the prediction of rock burst classification. Some main factors of rock burst including the uniaxial compressive strength (σc), the tensile strength (σ... The method of cloud model with entropy weight was adopted for the prediction of rock burst classification. Some main factors of rock burst including the uniaxial compressive strength (σc), the tensile strength (σt), the tangential stress (σθ), the rock brittleness coefficient (σc/σt), the stress coefficient (σθ /σc) and the elastic energy index (Wet) are chosen to establish evaluation index system. The entropy?cloud model and criterion are obtained through 209 sets of rock burst samples from underground rock projects. The sensitivity of indicators is analyzed and 209 sets of rock burst samples are discriminated by this model. The discriminant results of the entropy-cloud model are compared with those of Bayes, KNN and RF methods. The results show that the sensitivity order of those factors from high to low is σ_θ /σ_c, σ_θ, W_(ct), σ_c/σ_t, σ_t, σ_c, and the entropy-cloud model has higher accuracy than Bayes, K-Nearest Neighbor algorithm (KNN) and Random Forest (RF) methods. 展开更多
关键词 rock burst PREDICTION cloud model entropy weight sensitivity
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Application of support vector machine in trip chaining pattern recognition and analysis of explanatory variable effects 被引量:2
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作者 杨硕 邓卫 程龙 《Journal of Southeast University(English Edition)》 EI CAS 2017年第1期106-114,共9页
In order to improve the accuracy of travel demand forecast and considering the distribution of travel behaviors within time dimension, a trip chaining pattern recognition model was established based on activity purpos... In order to improve the accuracy of travel demand forecast and considering the distribution of travel behaviors within time dimension, a trip chaining pattern recognition model was established based on activity purposes by applying three methods: the support vector machine (SVM) model, the radial basis function neural network (RBFNN) model and the multinomial logit (MNL) model. The effect of explanatory factors on trip chaining behaviors and their contribution to model performace were investigated by sensitivity analysis. Results show that the SVM model has a better performance than the RBFNN model and the MNL model due to its higher overall and partial accuracy, indicating its recognition advantage under a smai sample size scenario. It is also proved that the SVM model is capable of estimating the effect of multi-category factors on trip chaining behaviors more accurately. The different contribution of explanatory, factors to trip chaining pattern recognition reflects the importance of refining trip chaining patterns ad exploring factors that are specific to each pattern. It is shown that the SVM technology in travel demand forecast modeling and analysis of explanatory variable effects is practical. 展开更多
关键词 trip chaining patterns support vector machine recognition performance sensitivity analysis
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李修文:风暴处理者
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作者 谈骁 《长江文艺评论》 2020年第1期88-90,共3页
一、认出风暴2019年,李修文在写给《长江文艺》70周年纪念册的赠言里,引用了他心仪的诗人里尔克《预感》中的句子:"我认出了风暴而激动如大海"。对风暴的描述,大概以这句最合人心,认为把里尔克捧得过高的北岛,在写里尔克的长... 一、认出风暴2019年,李修文在写给《长江文艺》70周年纪念册的赠言里,引用了他心仪的诗人里尔克《预感》中的句子:"我认出了风暴而激动如大海"。对风暴的描述,大概以这句最合人心,认为把里尔克捧得过高的北岛,在写里尔克的长文里,也直接以此句为题。读李修文的《山河袈裟》和《致江东父老》,我也总是想到这个句子. 展开更多
关键词 里尔克 江东父老 李修文 北岛 《预感》 纪念册 风暴
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周笔畅 黑白之间的沉潜
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作者 云崽子 Jacque(摄影) 《音乐世界》 2011年第24期56-63,共8页
继《预感》MV之后,周笔畅又再次携手adidas Originals共同为Easy拍摄了大片。
关键词 周笔畅 《预感》 EASY 拍摄
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小幽默
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《现代企业》 2010年第5期I0001-I0001,共1页
预感 晚上,母亲告诉我一个坏消息:“今天下午你养的那只鹦鹉飞走了。” “果然不出我所料,”我平静地回答,“昨天我在复习地理时,它就一动不动地站在我的肩膀上,仔细地观察着地图。”
关键词 幽默 《预感》 《立刻去做》 笑话
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The Expression of NF-Kappa B Family Protein and Its Relationship with Drug Resistance in Breast Cancer Cell Lines
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作者 胡群 孔祥 《The Chinese-German Journal of Clinical Oncology》 CAS 2003年第4期216-218,251,252,共5页
Objective: To study the expression of NFκB family protein in breast cancer cell lines and the relationship between NFκB family protein and the drug resistance.Methods: Expression of P65, IκB-α in 14 breast cancer ... Objective: To study the expression of NFκB family protein in breast cancer cell lines and the relationship between NFκB family protein and the drug resistance.Methods: Expression of P65, IκB-α in 14 breast cancer cell lines and P50 in 11 breast cancer cell lines was detected by Western blot. The sensitivity of the cells to ADM was determined by MTT.Results: 1κB-α located mainly in the cytoplasm. P65 and P50 were in both of cytoplasm and nucleus. The expression level of P50 was higher than that of P65, especially in nucleus. MTT assay showed that IC50 was three-fold higher in the cell lines which expressed P50 in nucleus than those P50 negative in nucleus, but no difference was found in the expression of P65.Conclusion: The expression of P50 in nucleus may predict the chemotherapy resistance in breast cancer, so it can be used as an indicator to predict the prognosis. The expression of P50 is more often in breast cancer, and it may play a more important role in the chemotherapy resistance than other NFκB family members. Key words breast cancer - NFκB - chemotherapy resistance 展开更多
关键词 breast cancer NFΚB chemotherapy resistance
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Science Letters:A modified chlorophyll absorption continuum index for chlorophyll estimation 被引量:3
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作者 YANG Xiao-hua HUANG Jing-feng +3 位作者 WANG Fu-min WANG Xiu-zhen YI Qiu-xiang WANG Yuan 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第12期2002-2006,共5页
There is increasing interest in using hyperspectral data for quantitative characterization of vegetation in spatial and temporal scopes. Many spectral indices are being developed to improve vegetation sensitivity by m... There is increasing interest in using hyperspectral data for quantitative characterization of vegetation in spatial and temporal scopes. Many spectral indices are being developed to improve vegetation sensitivity by minimizing the background influence. The chlorophyll absorption continuum index (CACI) is such a measure to calculate the spectral continuum on which the analyses are based on the area of the troughs spanned by the spectral continuum. However, different values of CACI were obtained in this method because different positions of continuums were determined by different users. Furthermore, the sensitivity of CACI to agronomic parameters such as green leaf chlorophyll density (GLCD) has been reduced because the fixed positions of con- tinuums are determined when the red edge shifted with the change in GLCD. A modified chlorophyll absorption continuum index (MCACI) is presented in this article. The red edge inflection point (REIP) replaces the maximum reflectance point (MRP) in near-infrared (NIR) shoulder on the CACI continuum. This MCACI has been proved to increase the sensitivity and predictive power of GLCD. 展开更多
关键词 CONTINUUM CHLOROPHYLL Sensitivity Prediction power
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Eradication of H pylori for the prevention of gastric cancer 被引量:4
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作者 Karolin Trautmann Manfred Stolte Stephan Miehlke 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第32期5101-5107,共7页
Infection with H pylori is the most important known etiological factor associated with gastric cancer. While colonization of the gastric mucosa with H pylori results in active and chronic gastritis in virtually all in... Infection with H pylori is the most important known etiological factor associated with gastric cancer. While colonization of the gastric mucosa with H pylori results in active and chronic gastritis in virtually all individuals infected, the likelihood of developing gastric cancer depends on environmental, bacterial virulence and host specific factors. The majority of all gastric cancer cases are attributable to H pylori infection and therefore theoretically preventable. There is evidence from animal models that eradication of H pylori at an early time point can prevent gastric cancer development. However, randomized clinical trials exploring the prophylactic effect of Hpylori eradication on the incidence of gastric cancer in humans remain sparse and have yielded conflicting results. Better markers for the identification of patients at risk for H pylori induced gastric malignancy are needed to allow the development of a more efficient public eradication strategy. Meanwhile, screening and treatment of H pylori in first-degree relatives of gastric cancer patients as well as certain high-risk populations might be beneficial. 展开更多
关键词 Gastric cancer HPYLORI ERADICATION
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Hepatitis B virus infection:A favorable prognostic factor for intrahepatic cholangiocarcinoma after resection 被引量:16
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作者 Hua-Bang Zhou Hui Wang Yu-Qiong Li Shuang-Xi Li Hao Wang Dong-Xun Zhou Qian-Qian Tu Qing Wang Shan-Shan Zou Meng-Chao Wu He-Ping Hu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第10期1292-1303,共12页
AIM: To study the prognostic factors for intrahepatic cholangiocarcinoma (ICC) and evaluate the impact of chronic hepatitis B virus (HBV) infection on survival rate of ICC patients. METHODS: A total of 155 ICC p... AIM: To study the prognostic factors for intrahepatic cholangiocarcinoma (ICC) and evaluate the impact of chronic hepatitis B virus (HBV) infection on survival rate of ICC patients. METHODS: A total of 155 ICC patients who underwent macroscopic curative resections (R0 and R1) were enrolled in this retrospective study and divided into group A with HBV infection and group B without HBV infection according to their chronic HBV infection, represented by positive hepatitis B surface antigen (HBsAg) in serum or in liver tissue. Clinicopathological characteristics and survival rate of the patients were evaluated. RESULTS: All patients underwent anatomical resection. Their 1- and 3-year survival rates were 60.6% and 32.1%, respectively. Multivariate analyses revealed that HBV infection, hepatolithiasis, microscopic satellite lesion, and lymphatic metastasis were the independent prognostic factors for the survival rate of ICC patients. The median disease-free survival time of the patients was 5.0 too. The number of tumors, microscopic satellite lesion, and vascular invasion were the independent prognostic factors for the disease-free survival rate of the patients. The prognostic factors affecting the survival rate of ICC patients with HBV infection and those without HBV infection were not completely consistent. Alkaline phosphatase 〉 119 U/L, microscopic satellite lesion, vascular invasion, and lymphatic metastasis were the independent factors for the patients with HBV infection, while r-glutamyltransferase 〉 64 U/L, microscopic satellite lesion, and poor tumor differentiation were the independent factors for the patients without HBV infection. CONCLUSION: HBV infection is a valuable clinical factor for predicting tumor invasiveness and clinical outcome of ICC patients. ICC patients with HBV infection should be distinguished from those without HBV infection because they have different dinicopathological characteristics, prognostic factors and outcomes after surgical resection. 展开更多
关键词 Intrahepatic cholangiocarcinoma Hepatitis B virus SURVIVAL PROGNOSIS
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Flood Hazard Prediction from Soil Properties by Remote Sensing and Genographic Information System:A Case Study of Mae Rim Watershed,Chiang Mai Province,Thailand 被引量:4
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作者 PANJIANJIUN E.BERGSMA 《Pedosphere》 SCIE CAS CSCD 1998年第1期71-78,共8页
Physiography and soil in Mae Rim watershed, Chiang Mai Province, Thailand were investigated by using aerial photographs and satellite image in conjunction with field work, and soil infiltration rate and soil shear res... Physiography and soil in Mae Rim watershed, Chiang Mai Province, Thailand were investigated by using aerial photographs and satellite image in conjunction with field work, and soil infiltration rate and soil shear resistance were measured in field. Many factors affecting runoff were analyzed using the Integrated Land and Water Information System (ILWIS). As a result, a model determining flood hazard was set up. Three maps including runoff curve number map, runoff coefficient map, and flood inundation map were created. In addition, the time of concentration was predicted. 展开更多
关键词 flood hazard prediction Mae Rim watershed soil properties surface runout coefficient
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Elucidation of the relationship of BNIP3 expression to gemcitabine chemosensitivity and prognosis 被引量:8
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作者 Masaharu Ishida Makoto Sunamura +6 位作者 Toru Furukawa Masanori Akada Hiroko Fujimura Emiko Shibuya Shinichi Egawa Michiaki Unno Akira Horii 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第34期4593-4597,共5页
AIM: To evaluate the significance of BNIP3 in the pathogenesis of pancreatic cancer, we analyzed the relationship between the expression of BNIP3 and survival rate of the patients with pancreatic cancer, or chemosensi... AIM: To evaluate the significance of BNIP3 in the pathogenesis of pancreatic cancer, we analyzed the relationship between the expression of BNIP3 and survival rate of the patients with pancreatic cancer, or chemosensitivities in pancreatic cancer cell lines, particularly for gemcitabine, the first-line anti-tumor drug for pancreatic cancer. METHODS: To compare the expression level of BNIP3 with the resistance to gemcitabine, eight pancreatic cancer cell lines were subjected to gemcitabine treatment and the quantitative real-time RT-PCR method was used to evaluate BNIP3 expression. Immunohistochemical analysis was also performed using 22 pancreatic cancer specimens to study relationship between BNIP3 expression and survival rate. RESULTS: Although no significantly positive association between BNIP3 mRNA level and gemcitabine chemosensitivity was observed, pancreatic cancer cell lines that were sensitive to gemcitabine treatment tended to show high levels of BNIP3 expression. The converse, an absence of BNIP3 expression, was not correlated with gemcitabine resistance. We further compared the BNIP3 expression profiles of resected primary pancreaticcancer specimens with the prognosis of the patients, and found a tendency of favorable prognosis and low BNIP3 expression. CONCLUSION: High levels of BNIP3 expression cannot be used as one of the predicting factors for gemcitabine chemosensitivity, and some yet to be known factors will have to fill the gap for the accurate prediction of pancreatic cancer chemosensitivity to gemcitabine. However, BNIP3 expression may have an impact on prediction of prognosis of patients with pancreatic cancer. 展开更多
关键词 BNIP3 CHEMOSENSITIVITY GEMCITABINE Pancreatic cancer PROGNOSIS
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Semi-autogenous mill power prediction by a hybrid neural genetic algorithm 被引量:2
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作者 Hoseinian Fatemeh Sadat Abdollahzadeh Aliakbar Rezai Bahram 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第1期151-158,共8页
There are few methods of semi-autogenous(SAG)mill power prediction in the full-scale without using long experiments.In this work,the effects of different operating parameters such as feed moisture,mass flowrate,mill l... There are few methods of semi-autogenous(SAG)mill power prediction in the full-scale without using long experiments.In this work,the effects of different operating parameters such as feed moisture,mass flowrate,mill load cell mass,SAG mill solid percentage,inlet and outlet water to the SAG mill and work index are studied.A total number of185full-scale SAG mill works are utilized to develop the artificial neural network(ANN)and the hybrid of ANN and genetic algorithm(GANN)models with relations of input and output data in the full-scale.The results show that the GANN model is more efficient than the ANN model in predicting SAG mill power.The sensitivity analysis was also performed to determine the most effective input parameters on SAG mill power.The sensitivity analysis of the GANN model shows that the work index,inlet water to the SAG mill,mill load cell weight,SAG mill solid percentage,mass flowrate and feed moisture have a direct relationship with mill power,while outlet water to the SAG mill has an inverse relationship with mill power.The results show that the GANN model could be useful to evaluate a good output to changes in input operation parameters. 展开更多
关键词 semi-autogenous mill mill power prediction sensitivity analysis artificial neural network genetic algorithm
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siRNA, miRNA and HIV: promises and challenges 被引量:8
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作者 Man Lung YEUNG Yamina BENNASSER +1 位作者 Shu Yun LE Kuan Teh JEANG 《Cell Research》 SCIE CAS CSCD 2005年第11期935-946,共12页
Small interfering RNA (siRNA) and microRNA (miRNA) are small RNAs of 18-25 nucleotides (nt) in length that play important roles in regulating gene expression. They are incorporated into an RNA-induced silencing comple... Small interfering RNA (siRNA) and microRNA (miRNA) are small RNAs of 18-25 nucleotides (nt) in length that play important roles in regulating gene expression. They are incorporated into an RNA-induced silencing complex (RISC) and serve as guides for silencing their corresponding target mRNAs based on complementary base-pairing. The promise of gene silencing has led many researchers to consider siRNA as an anti-viral tool. However, in long-term settings, many viruses appear to escape from this therapeutical strategy. An example of this may be seen in the case of human immunodeficiency virus type-1 (HIV-1) which is able to evade RNA silencing by either mutating the siRNA- targeted sequence or by encoding for a partial suppressor of RNAi (RNA interference). On the other hand, because miRNA targeting does not require absolute complementarity of base-pairing, mutational escape by viruses from miRNA- specified silencing may be more difficult to achieve. In this review, we discuss stratagems used by various viruses to avoid the cells’ antiviral si/mi-RNA defenses and notions of how viruses might control and regulate host cell genes by encoding viral miRNAs (vmiRNAs). 展开更多
关键词 small interfering RNA MICRORNA RNA interference human immunodeficiency virus type-1 RNA-induced silencing complex suppressor of siRNA viral miRNA
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Predictive value of neutrophil infiltration as a marker of Helicobacter pylori infection 被引量:5
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作者 Xiao-Qing Xu Zhen-Hua Wang +4 位作者 Jing-Xian Liao Xiao-Yu Chen Wen-Zhong Liu Shu-Dong Xiao Hong Lu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第36期5101-5105,共5页
AIM: To evaluate the predictive value of neutrophil in- filtration as a marker of Helicobacter pylori (H. pyloni) infection. METHODS: A total of 315 patients with dyspepsia symptoms who underwent upper gastrointes... AIM: To evaluate the predictive value of neutrophil in- filtration as a marker of Helicobacter pylori (H. pyloni) infection. METHODS: A total of 315 patients with dyspepsia symptoms who underwent upper gastrointestinal en- doscopy were enrolled in this study. Biopsies were evaluated using the updated Sydney system. The medication history of all patients in the preceding 4 wk was recorded. The diagnosis of H. pylori infection was based on 13C-urea breath test at least 4 wk after with- drawal of antisecretory drugs, antibiotics and related drugs. For the patients with subtotal gastrectomy, the diagnosis of H. pylori infection was based on anti-H. pylori immunoglobulin G (IgG) antibody. Serum anti-H. pylori IgG antibody was measured by enzyme-linked immunosorbent assays (Biohit, Finland). RESULTS: The sensitivity, specificity, positive predic- tive value and negative predictive value of neutrophil infiltration in the diagnosis ofH, pylorlinfection were 92.3%, 83.5%, 77.4% and 94.7%, respectively. Neu- trophil infiltration of gastric mucosa in the histological analysis was strongly associated withH, pylorlinfection (77.4% vs 5.3% in the neutrophil infiltration negative group, P = 0.000). Moderate neutrophil infiltration was more frequent in H. pylorl infection when compared to mild infiltration (81.8% and 75%, respectively), but did not reach statistical significance. For those patients with negative rapid urease test, H. pylori was detected in 73.2% of patients with positive neutrophil infiltration on histology. In patients with subtotal gastrectomy, the diagnostic accuracy of neutrophil infiltration in H. pylori infection was 50%. CONCLUSION: Neutrophil infiltration is closely associ- ated withH, pylori and may be recognized as a sign of this infection. 展开更多
关键词 Helicobacter pylori HISTOLOGY NEUTROPHIL Sensitivity SPECIFICITY
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Use of arrays to investigate the contribution of ATP-binding cassette transporters to drug resistance in cancer chemotherapy and prediction of chemosensitivity 被引量:7
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作者 Jian-Ting Zhang 《Cell Research》 SCIE CAS CSCD 2007年第4期311-323,共13页
Multidrug resistance (MDR) is a major problem in cancer chemotherapy. One of the best known mechanisms of MDR is the elevated expression of ATP-binding cassette (ABC) transporters. While some members of human ABC ... Multidrug resistance (MDR) is a major problem in cancer chemotherapy. One of the best known mechanisms of MDR is the elevated expression of ATP-binding cassette (ABC) transporters. While some members of human ABC transporters have been shown to cause drug resistance with elevated expression, it is not yet known whether the over-expression of other members could also contribute to drug resistance in many model cancer cell lines and clinics. The recent development ofmicroarrays and quantitative PCR arrays for expression profiling analysis of ABC transporters has helped address these issues. In this article, various arrays with limited or full list of ABC transporter genes and their use in identifying ABC transporter genes in drug resistance and chemo-sensitivity prediction will be reviewed. 展开更多
关键词 GENOMICS MDR drug resistance ABC transporter MICROARRAY real time quantitative PCR
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Preliminary Study of Sensitive Areas for Several Tropical Cyclone Track Prediction Cases in 2007 被引量:1
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作者 TAN Xiao-Wei WANG Dong-Liang 《Atmospheric and Oceanic Science Letters》 2010年第6期299-302,共4页
Conditional (CNOP) obtained by nonlinear optimal perturbation the ensemble-based calculation method is employed to find possible sensitive areas for improving 48-h or more than 48-h tropical cyclone (TC) track pr... Conditional (CNOP) obtained by nonlinear optimal perturbation the ensemble-based calculation method is employed to find possible sensitive areas for improving 48-h or more than 48-h tropical cyclone (TC) track predictions in several cases affecting China in 2007. These sensitive areas are examined by observing system simulation experiments (OSSEs). Results show that these sensitive areas improve TC track predictions for 48 h or more to different extents. Further analysis is performed to determine the distribution characteristics of sensitive areas in these cases. Results show that areas south of Luzon and over surrounding oceans are significant for 48-h or more than 48-h TC track predictions, especially 60-h to 72-h track predictions. Areas over oceans north or east to Taiwan Island seem to be secondary sensitive for 48-h or more than 48-h TC track predictions. 展开更多
关键词 CNOP sensitive areas tropical cyclone track prediction
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Regionalization for Rice Yield Estimation by Remote Sensing in Zhejiang Province 被引量:9
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作者 XU HONGWEI and WANG KE Institute of Agricultural Remote Sensing and Information System, Zhejiang University, Hangzhou 310029 (china) 《Pedosphere》 SCIE CAS CSCD 2001年第2期175-184,共10页
In order to provide a scientific basis for rice yield estimation and improve the accuracy of yield estimation in Zhejiang Province, regionalization indices for rice yield estimation by remote sensing (RS) in the provi... In order to provide a scientific basis for rice yield estimation and improve the accuracy of yield estimation in Zhejiang Province, regionalization indices for rice yield estimation by remote sensing (RS) in the province were determined by considering the special features of yield estimation by RS, and based on analysis of the natural conditions of Zhejiang Province. The indices determined included rice cropping system, agroclimate, landform, surface feature structure and rice yield level, where rice planting system was considered as the main one. Then regionalization for rice yield estimation by RS was completed by spatial neighboring analysis with the Geographical information System (GIS) technology combined with using of tree algorithm. The province was divided into two regions, i. e., the single-cropping rice region which was subdivided into 3 regions including those in mountains of northwest Zhejiang, water network area of north Zhejiang and mountains of south Zhejiang, and double-cropping rice region which was subdivided into 5 regions including those on plain of north Zhejiang, coastal plains and hills of southeast Zhejiang, Jin-Qu Basin of middle Zhejiang, hills of east Zhejiang, and hills and mountains of northwest Zhejiang. This regionalization took the county borders as the region boundaries, kept the regions connective and made the administrative regions integrity and, then, could meet the requirements of rice yield estimation by RS, showing that the results were quite satisfying. 展开更多
关键词 Geographical information System (GIS) REGIONALIZATION remote sensing (RS) yield estimation
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