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Population Shrinkage in Resource-dependent Cities in China: Processes, Patterns and Drivers

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Chinese Geographical Science 2020年第1期30卷 1-15页

作者： LI He kevin LO ZHANG Pingyu Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China Department of Geography Hong Kong Baptist UniversityKowloon Tong999077Hong KongChina College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Resource-dependent cities(RCs)are a vulnerable group of urban settlements that often face population shrinkage;however,population changes in RCs in China are not well *** study offers new insight into this matter through a robust analysis that features a longer time scale,a larger sample of RCs,and a finer unit of *** finds new evidence that problems of population shrinkage in RCs are more serious than previous literature has *** 30%of the studied units have experienced either long-term or short-term population shrinkage,and many more are experiencing a slowing down of population *** are especially common among three types of RCs:the resource-depleted RCs,the forestry-based RCs,and RCs in Northeast *** results underscore transition policy inadequacies in addressing population loss,and call for a more comprehensive and diversified population policy that tackles the multifaceted factors that contribute to population shrinkage,including lack of industrial support,maladjustment to market oriented reformation,poor urban environment and natural population decline.

关键词： resource-dependent cities urban shrinkage population change urbanization,China

NOTES ON “MULTICRITERIA FUZZY DECISION-MAKING METHOD BASED ON A NOVEL ACCURACY FUNCTION UNDER INTERVAL-VALUED INTUITIONISTIC FUZZY ENVIRONMENT”

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Journal of Systems Science and Systems Engineering 2010年第4期19卷 504-508页

作者： kevin W. LI Zhoujing WANG Odette School of Business University of Windsor Windsor Ontario N9B 3P4 Canada School of Computer Science and Engineering Beihang University Beijing 100083 China Department of Automation Xiamen University Xiamen Fujian 361005 China

This note points outs the inappropriateness of an accuracy function introduced by Ye [Ye, J. （2009）. Multicriteria fuzzy decision-making method based on a novel accuracy function under interval-valued intuitionistic fuzzy environment. Expert Systems with Applications, 36 （3）： 6899-6902] and its misleading use for comparing two interval-valued intuitionistic fuzzy numbers.

关键词： Interval-valued intuitionistic fuzzy set accuracy function score function multicriteria decision-making

Ewings family oncoproteins: drunk,disorderly and in search of partners

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Cell Research 2007年第4期17卷 286-288页

作者： kevin A W Lee Kowloon SAR China Department of Biology Hong Kong University of Science and Technology

Aberrant chromosomal translocations involving the Ew-ings sarcoma(EWS)oncogene produce the EWS-fusion-protein family(EFPs,Figure 1A)that causes a wide varietyof human cancers[1].Extensive analysis of chromosomalbreakpoints[2]has long established that,generally,EFPscontain at least the N-terminal 264 residues of EWS [theEWS-activation-domain(EAD)].The C-terminal fusionpartner is a cellular transcription factor that contributes,minimally,a sequence-specific DNA-binding domainwhich determines the tumor ***,EFPs arepotent transcriptional activators but also interact with otherproteins involved in different aspects of mRNA biogenesis,indicating that EFPs induce tumorigenesis by perturbinggene *** many reasons the mechanism of EAD action hasremained quite *** major barrier to progressis presented by the primary structure of the EAD(Figure1B)comprising～250 residues and(almost exclusively)30copies of a degenerate hexapeptide repeat(DHR,consensusSYGQQS)with the Tyr being absolutely and the first Glnbeing strongly conserved(Figure 1B).Because the intact

关键词： EAD EWS drunk,disorderly and in search of partners Ewings family oncoproteins

Development and evaluation of corrosion resistant coating for expandable rock bolt against highly corrosive ground conditions

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International Journal of Mining Science and Technology 2018年第1期28卷 145-151页

作者： kevin Jinrong Ma John Stankus Dakota Faulkner Keystone Mining Services LLC of Jennmar Corporation Inc

Expandable rock bolts are widely used in hard rock mines as an efficient ground control ***, capacity and service life can be significantly reduced if the metallic body is subjected to *** some hard rock mines in the U.S., highly corrosive ground conditions exist, and it has been reported that inflatable rock bolts have corroded within a few months after *** provide mining industry a cost-effective inflatable bolt and combat the corrosion issues, Jennmar Corporation, Inc.,and its subsidiary Keystone Mining Services, LLC(KMS), analyzed corroded bolt samples, identified root causes, evaluated properties of various coating materials, and developed a new inflatable rock bolt,Python M3^(TM), that is protected with an innovative PyFlexU2^(TM)*** new generation Python M3^(TM) features improved steel chemistry for reliable performance, modified profile for better inflation, and surface preparation and coating *** PyFlexU2^(TM)is impervious to liquid and air, durable, and UV *** a flexible, adhesive, and highly corrosion-resistant undercoating, and a very hard sacrificial surface coating, the PyFlexU2^(TM)coating system provides the Python M3^(TM)superior protection against chemical corrosion and physical scratch *** under-coating has exceptional flexibility and adhesion to prevent coating micro-cracks or fractures after bolt inflation and possesses excellent corrosion resistance to acids(pH 11), fuels, and salt *** corrosion and scratch resistant PyFlexU2^(TM)coating offers very effective bolt protection for extra longevity in highly corrosive *** Python M3^(TM)coated with PyFlexU2^(TM)has been tested in the most challenging conditions,including laboratory corrosion tests in extreme acidic and basic solvents, rock slurry, and borehole scratch insertion *** demonstrated corrosion and scratch resistance, the product has been greatly welcomed by hard rock min

关键词： Rock bolt Hard rock Corrosive ground condition Bolt corrosion

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彩妆天王kevin完美彩妆全攻略 1版

Routine rectal retroflexion during colonoscopy has a low yield for neoplasia

2011年

作者： kevin

本书作者kevin针对不同眉型、各种眼部线条、睫毛、眼线、颊、唇、修容到色彩的变化，推出史上最详尽最完整的教学步骤，介绍如何打造超迷人的完美妆容。

ISBN: (纸本)9787807634935

关键词：基本知识化妆

来源：畅想之星图书光盘版（南... 评论

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World Journal of Gastroenterology 2008年第42期14卷 6503-6505页

作者： Abdo Saad Douglas kevin Rex Department of Medicine Division of Gastroenterology/Hepatology Indiana University School of Medicine Indianapolis IN 46202 United States

AIM： To investigate the value of retroflexion in detecting neoplasia in the distal rectum. METHODS： This was a prospective observational study performed in an academic endoscopy unit. Consecutive patients undergoing colonoscopy had careful forward viewing of the distal rectum by retroflexion. Of 1502 procedures, 1076 （72%） procedures were performed with a 140^o angle of view colonoscope and 426 （28%） were performed with a 170^o angle of view colonoscope. The outcome measurement was the yield of neoplasia in the distal rectum detected by forward viewing vs retroflexion. RESULTS： A total of 1502 patients, including 767 （51%） females and 735 （49%） males, with mean age of 58.8 ± 12.5 years were enrolled. Retroflexion was successful in 1411 （93.9%） patients, unsuccessful or not performed because the rectum appeared narrow in 91 （6.1%）. Forty patients had a polyp detected in the distal rectal mucosa. Thirty-three were visible in both the forward and retroflexed view （25 hyperplastic, 8 adenomatous）. Seven polyps were visualized only by retroflexion （6 hyperplastic sessile polyps, one 4 mm sessile tubular adenoma）. There was no significant difference in information added by retroflexion with 140^o vs 170^o angle of view instrument. CONCLUSION： To our knowledge, this is the largest reported evaluation of retroflexion in the rectum. Routine rectal retroflexion did not detect clinically important neoplasia after a careful forward examination of the rectum to the dentate line. Since retroflexion has risks and may cause discomfort, theuse of routine retroflexion should be at the discretion of the endoscopist.

关键词： Colonoscopy Colorectal polyps Retroflexion Rectum

Modern treatment of gastric gastrointestinal stromal tumors

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World Journal of Gastroenterology 2012年第46期18卷 6720-6728页

作者： kevin K Roggin Mitchell C Posner Department of Surgery Pritzker School of Medicine University of Chicago

Gastrointestinal stromal tumors (GIST) are rare mesenchymal smooth muscle sarcomas that can arise anywhere within the gastrointestinal tract. Sporadic mutations within the tyrosine kinase receptors of the interstitial cells of Cajal have been identified as the key molecular step in GIST carcinogenesis. Although many patients are asymptomatic, the most common associated symptoms include: abdominal pain, dyspepsia, gastric outlet obstruction, and anorexia. Rarely, GIST can perforate causing life-threatening hemoperitoneum. Most are ultimately diagnosed on cross-sectional imaging studies (i.e., computed tomography and/or magnetic resonance imaging in combination with upper endoscopy. Endoscopic ultrasonographic localization of these tumors within the smooth muscle layer and acquisition of neoplastic spindle cells harboring mutations in the c-KIT gene is pathognomonic. Curative treatment requires a complete gross resection of the tumor. Both open and minimally invasive operations have been shown to reduce recurrence rates and improve long-term survival. While there is considerable debate over whether GIST can be benign neoplasms, we believe that all GIST have malignant potential, but vary in their propensity to recur after resection and metastasize to distant organ sites. Prognostic factors include location, size (i.e., > 5 cm), grade (> 5-10 mitoses per 50 high power fields and specific mutational events that are still being defined. Adjuvant therapy with tyrosine kinase inhibitors, such as imatinib mesylate, has been shown to reduce the risk of recurrence after one year of therapy. Treatment of locally-advanced or borderline resectable gastric GIST with neoadjuvant imatinib has been shown to induce regression in a minority of patients and stabilization in the majority of cases. This treatment strategy potentially reduces the need for more extensive surgical resections and increases the number of patients eligible for curative therapy. The modern surgical treatment of

关键词： Gastrointestinal stromal tumors Laparoscopic resections of gastrointestinal stromal tumors Imatinib mesylate Gastrectomy

Testosterone and cardiovascular disease in men

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Asian Journal of Andrology 2012年第3期14卷 428-435,I0007页

作者： Paul D Morris kevin S Channer Sheffield Teaching Hospital NHS Trust Sheffield S10 2JF UK

Despite regional variations in the prevalence of coronary artery disease （CAD）, men are consistently more at risk of developing and dying from CAD than women, and the gender-specific effects of sex hormones are implicated in this inequality. This ＇Perspectives＇ article reviews the current evidence regarding the cardiovascular effects of testosterone in men including an examination of the age-related decline in testosterone, the relationship between testosterone levels and coronary disease, coronary risk factors and mortality. We also review the vaso-active effects of testosterone, and discuss how these have been used in men with heart failure and angina. We discuss the ＇cause＇ versus ＇effect＇ controversy, regarding low testosterone levels in men with coronary heart disease, as well as concerns over the use of testosterone replacement therapy in middle aged and elderly men. The article concludes with a discussion regarding the future direction for work in this interesting area, including the relative merits of screening for, and treating hypogonadism with testosterone replacement therapy in men with heart disease.

关键词： atherosclerosis chronic heart failure ischaemic heart disease replacement therapy testosterone

Extracting inter-area oscillation modes using local measurements and data-driven stochastic subspace technique

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Journal of Modern Power Systems and Clean Energy 2017年第5期5卷 704-712页

作者： Deyou YANG Guowei CAI kevin CHAN School of Electrical Engineering Northeast Dianli UniversityJilinChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongSARChina

In this paper, a data-driven stochastic subspace identification(SSI-DATA) technique is proposed as an advanced stochastic system identification(SSI) to extract the inter-area oscillation modes of a power system from wide-area measurements. For accurate and robust extraction of the modes’ parameters(frequency, damping and mode shape), SSI has already been verified as an effective identification algorithm for output-only modal *** new feature of the proposed SSI-DATA applied to inter-area oscillation modal identification lies in its ability to select the eigenvalue automatically. The effectiveness of the proposed scheme has been fully studied and verified,first using transient stability data generated from the IEEE16-generator 5-area test system, and then using recorded data from an actual event using a Chinese wide-area measurement system(WAMS) in 2004. The results from the simulated and recorded measurements have validated the reliability and applicability of the SSI-DATA technique in power system low frequency oscillation analysis.

关键词： Data-driven stochastic subspace identification(SSI-DATA) Power system inter-area oscillation Widearea measurement systems(WAMS) Modal analysis