检索结果-南通市图书馆

Journal of Electronic Science and Technology 2017年第4期15卷 400-406页

作者： Kein Huat Chua yun seng lim Jee Xiong Chew Universiti Tunku Abdul Rahman Cheras 43000 Malaysia

This paper outlines the barriers and potential benefits of using standby diesel generators in mitigating the peak demands for commercial and industrial customers. The feasibility of utilizing the standby diesel generators to reduce the electricity bills for customers is carried out by using the hybrid optimization model for electric renewable(HOMER)software. The size of the standby diesel generator and its operational duration are determined based on the lowest cost of electricity obtained from the evaluations. The economic assessments demonstrate that there is potential to reduce the electricity bills for commercial and industrial customers under the existing fuel price and tariffs. The commercial customers under the tariff C2 have the highest potential to save their electricity bills with the use of standby diesel generators for peak reduction. This study demonstrates the potential of the standby diesel generators in peak reduction.

关键词： Commercial and industrial customers cost of electricity hybrid optimization model for electric renewable(HOMER) peak reduction standby diesel generator

Life-cycle assessment of batteries for peak demand reduction

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2023年第4期21卷 20-34页

作者： Dylon Hao Cheng Lam yun seng lim Jianhui Wong Siti Nadiah M.Sapihie Department of Electrical and Electronic Engineering Universiti Tunku Abdul RahmanKajang43000Malaysia Group Research&Technology Division PETRONASBandar Baru Bangi43650Malaysia

At present,a life-cycle assessment of energy storage systems(ESSs)is not widely available in the *** an assessment is increasingly vital nowadays as ESS is recognized as one of the important equipment in power systems to reduce peak demands for deferring or avoiding augmentation in the network and power *** the battery cost is still very high at present,a comprehensive assessment is necessary to determine the optimum ESS capacity so that the maximum financial gain is achievable at the end of the batteries’***,an effective life-cycle assessment is proposed in this paper to show how the optimum ESS capacity can be determined such that the maximum net financial gain is achievable at the end of the batteries’lifespan when ESS is used to perform peak demand reductions for the customer or utility *** findings reveal the positive financial viability of ESS on the power grid,otherwise the projection of the financial viability is often seemingly poor due to the high battery cost with a short battery *** improved battery degradation model is used in this assessment,which can simulate the battery degradation accurately in a situation whereby the charging current,discharging current,and temperature of the batteries are intermittent on a site during peak demand *** assessment is crucial to determine the maximum financial benefits brought by ESS.

关键词： Degradation estimation Maximum net savings Peak demand reduction State of health(SOH)estimation

Voltage Unbalance Mitigation in Low Voltage Distribution Networks with Photovoltaic Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2012年第1期10卷 1-6页

作者： Kein Huat Chua yun seng lim Jianhui Wong Ezra Morris Stella Morris Philip Taylor the Electrical and Electronics Engineering Department Universiti Tunku Abdul RahmanMalaysia. the School of Engineering Durham UniversityDurhamUK

This paper proposes a technique to mitigate the voltage unbalance issue caused by the high penetration of photovoltaic （PV） systems into the low voltage distribution networks （LVDN） using a single phase energy storage system （ESS）. The ESS comprises a hi-directional power flow inverter and a battery bank. The system is capable of absorbing the excess power and delivering power to the network in order to keep the voltage unbalance factor （VUF） below the statutory limit of 1%. Investigations are carried out in the experimental small-scale energy zone （SSEZ）. The experimental results demonstrate that the ESS is capable of mitigating the VUF of the network.

关键词： Energy storage system low voltagedistribution network photovoltaic voltage unbalance.

Assessing the Applicability of Multi-Source Precipitation Products over the Chinese Mainland and Its Seven Regions

在线全文

学校读者我要写书评

暂无评论

Journal of Tropical Meteorology 2024年第3期30卷 275-288页

作者： TIAN Wei WU yun-long LIN Chen ZHANG Jing-guo lim KAM SIAN Kenny Thiam Choy School of Computer and Software Nanjing University of Information Science&TechnologyNanjing 210044 China School of Atmospheric Science and Remote Sensing Wuxi UniversityWuxiJiangsu 214105 China

Satellite-based and reanalysis precipitation products provide valuable information for various ***,their performance varies widely across regions due to different data sources and production *** paper evaluated the daily performance of four precipitation products(MSWEP,ERA5,PERSIANN,and TRMM)for seven regions of the Chinese mainland,using observations from 2462 ground stations across the country as a *** used four statistical and four classification indicators to describe their spatial and temporal accuracy,and capability to detect precipitation events while analyzing their *** results show that according to the precipitation char-acteristics and accuracy of different types of precipitation products over the Chinese mainland,MSWEP was the most suitable product over the Chinese mainland,having the lowest root mean square error and mean absolute error,along with the highest coefficient of *** was followed by TRMM and ERA5,whereas PERSIANN lagged behind in terms of *** terms of different regions,MSWEP still performed well,especially in North China and East *** accuracy of the four precipitation products was relatively low in the summer months,and they all overestimated in the northwest *** other months,MSWEP and TRMM were better than PERSIANN and *** four precipitation products had good detection performance over the Chinese mainland,with probability of detection above ***,with the increase of precipitation threshold,the detection capability of the four products decreased,and MSWEP and ERA5 had good detection capability for moderate ***’s detection capability for heavy rain and rainstorms was better than that of the other three products,and PERSIANN’s detection capability for moderate rain,heavy rain and rainstorms was relatively poor,with a large deviation.

关键词： precipitation product MSWEP TRMM ERA5 PERSIANN

Protein Arginine Methyltransferase 1 Ablation in Motor Neurons Causes Mitochondrial Dysfunction Leading to Age-related Motor Neuron Degeneration with Muscle Loss

在线全文

学校读者我要写书评

暂无评论

Research 2024年第1期2023卷 637-649页

作者： Hyun-Kyung So Hyebeen Kim Jinwoo Lee Chang-lim You Chae-Eun yun Hyeon-Ju Jeong Eun-Ju Jin yunju Jo Dongryeol Ryu Gyu-Un Bae Jong-Sun Kang Department of Molecular Cell Biology Sungkyunkwan University School of MedicineSuwonKorea Single Cell Network Research Center Sungkyunkwan University School of MedicineSuwonKorea Research Institute of Aging-Related Diseases AniMusCureInc.SuwonKorea Drug Information Research Institute Muscle Physiome Research CenterCollege of PharmacySookmyung Women’s UniversitySeoulKorea

Neuromuscular dysfunction is tightly associated with muscle wasting that occurs with age or due to degenerative ***,the molecular mechanisms underlying neuromuscular dysfunction are currently *** studies have proposed important roles of Protein arginine methyltransferase 1(Prmt1)in muscle stem cell function and muscle *** the current study,we set out to determine the role of Prmt1 in neuromuscular function by generating mice with motor neuron-specific ablation of Prmt1(mnKO)using *** exhibited age-related motor neuron degeneration and neuromuscular dysfunction leading to premature muscle loss and ***1 deficiency also impaired motor function recovery and muscle reinnervation after sciatic nerve *** transcriptome analysis of aged mnKO lumbar spinal cords revealed alterations in genes related to inflammation,cell death,oxidative stress,and ***,mnKO lumbar spinal cords of sciatic nerve injury model or aged mice exhibited elevated cellular stress response in motor ***,Prmt1 inhibition in motor neurons elicited mitochondrial *** findings demonstrate that Prmt1 ablation in motor neurons causes agerelated motor neuron degeneration attributing to muscle ***,Prmt1 is a potential target for the prevention or intervention of sarcopenia and neuromuscular dysfunction related to aging.

关键词： degeneration impaired prevention

Adjuncts to colonic cleansing before colonoscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第11期20卷 2735-2740页

作者： Sanghoon Park yun Jeong lim Department of Internal Medicine KEPCO Medical CenterKEPCO Medical FoundationSeoul 132-703South Korea Department of Internal Medicine Dongguk University Ilsan HospitalGoyang 411-773South Korea

Pre-procedural cleansing of the bowel can maximize the effectiveness and efficiency of ***,efficacy of the current gold standard colonic preparation method-high-volume oral administration of purgative agents 12-24 h prior to the procedure-is limited by several factors,such as patient compliance(due to poor palatability and inconvenience of the dosing regimen)and risks of complications(due to drug interactions or intolerance).Attempts to resolve these limitations have included providing adjunctive agents and methods to promote the colonic cleansing ability of the principal purgative agent,with the aim of lessening unpleasant side effects(such as bloating)and reducing the large ingested volume *** promising adjunctive agents are bisacodyl,magnesium citrate,senna,simethicone,metoclopramide,and prokinetics,and each are being investigated for their *** review provides an up to date summary of the reported investigations into the potencies and weaknesses of the key adjuncts currently being applied in clinic as supplements to the traditional bowel preparation *** the comparative analysis ofthese adjuncts showed that no single agent or method has yet achieved the goal of completely overcoming the limitations of the current gold standard preparation method,they at least provide endoscopists with an array of alternatives to help improve the suboptimal efficacy of the main cleansing solutions when used *** aid in this clinical endeavor,a subjective grade was assigned to each adjunct to indicate its practical *** addition,the systematic review of the currently available agents and methods provides insight into the features of each that may be overcome or exploited to create novel drugs and strategies that may become adopted as effective bowel cleansing adjuncts or alternatives.

关键词： Colonoscopy Cathartics Adjuncts Purgative agents Bowel preparation

Targeted therapy in gastric cancer:Personalizing cancer treatment based on patient genome

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第8期20卷 2042-2050页

作者： Sun Min lim Jae yun lim Jae Yong Cho Division of Medical Oncology Department of Internal MedicineSeverance HospitalYonsei University College of MedicineSeoul 135-720South Korea Department of Medical Oncology Gangnam Severance HospitalYonsei University College of MedicineSeoul 135-720South Korea

Gastric cancer is the second leading cause of cancerrelated deaths *** cytotoxic chemotherapy has limited efficacy for metastatic gastric cancer,with an overall survival of approximately ten *** advances in high-throughput technologies have enabled the implementation of personalized cancer therapy for high-risk *** use of such high-throughput technologies,including microarray and next generation sequencing,have promoted the discovery of novel targets that offer new treatment strategies for patients lacking other therapeutic *** molecular pathways are currently under investigation as therapeutic targets in gastric cancer,including those related to the epidermal growth factor receptor family,the mesenchymal-epithelial transition factor axis,and the phosphatidylinositol 3-kinase-AKTmammalian target of rapamycin *** in molecular diagnostic tools further support the discovery of new molecular *** exist,however;not all patients can be tested for biomarkers,and numerous challenges hamper implementation of targeted therapy in clinical ***,the scale of tumor genomic profiling is rapidly outpacing our ability to appropriately synthesize all the information in order to optimally refine patient ***,clinicians must continue to educate themselves regarding new tools and frameworks,and to utilize multidisciplinary team science,comprised of oncologists,geneticists,pathologists,biologists and bioinformaticians,to successfully implement this genomic approach therapeutically.

关键词： Gastric cancer Targeted therapy Biomarker Microarray Sequencing

What is the best strategy for successful bowel preparation under special conditions?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第11期20卷 2741-2745页

作者： yun Jeong lim Su Jin Hong Department of Internal Medicine College of MedicineDongguk UniversityGyeonggi-Do 410-773South Korea Digestive Disease Center and Research Institute Department of Internal MedicineSoonchunhyang University College of MedicineBucheonGyeonggi-Do 420-767South Korea

Adequate bowel preparation is important for successful colonoscopic examination. Several effective colonic cleansing agents are available and routinely prescribed, but each carries its own limitations and benefits from particular dosing regimens. The most frequently prescribed colonic cleansing agent, the polyethylene glycol (PEG) cathartic solution, suffers from low patient compliance in general, due to its unpalatable taste and smell coupled with the large ingested volumes required. However, PEG is preferred over other cathartics for use in individuals of advanced age, sufferers of chronic kidney disease, heart failure and inflammatory bowel disease, and women who are pregnant or lactating. The laxative agents sodium phosphate (NaP) and sodium picosulfate plus magnesium citrate have been applied and have improved patient compliance and tolerance. NaP, however, should be avoided in individuals with impaired renal function or plasma clearance, such as those with chronic kidney disease, who are taking drugs that affect renal function, or who suffer from heart failure. Other special conditions that may affect an individual’s tolerance of the cathartic agent or ability to complete the administration routine include stroke, severe constipation, hematochezia, suspicious lower gastrointestinal bleeding, and mental disorders such as dementia. All ingestible bowel preparation solutions can be instilled into the stomach and duodenum through nasogastric tube or esophagogastroduodenoscope with the aid of a water irrigation pump for patients with difficulties swallowing or ingesting the large volumes of fluid required. In addition, dietary regimens based on clear liquids and low-residue foods for 1-4 d prior to the colonoscopy may be supplemental bowel preparation strategies. Achieving an effective and safe cleansing of the bowel is important for successful colonoscopy in all patients, so full knowledge of the individual’s condition and capabilities is necessary

关键词： Colonoscopy Preparation Polyethylene glycols Special conditions Cathartic agent

Risk factor analysis for meta plastic gastritis in Koreans

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第16期12卷 2584-2587页

作者： Soonami Choi yun Jeong lim Sue Kyung Park Center for Health Promotion Samsung Medical CenterSeoulKorea Department of Internal Medicine Dongguk University International HospitalDongguk University College of MedicineGoyangKorea Department of Preventive Medicine Seoul National University College of MedicineSeoulKorea

AIM： To conduct a retrospective study to determine the risk factors for development of metaplastic gastritis in Korean population. METHODS： The database of 113449 subjects who underwent a gastroscopy for the purpose of a regular check-up at center for health promotion, Samsung medical center during 5 years was collected and retrospectively analyzed. Among them, 5847 subjects who had endoscopically diagnosed as a metaplastic gastritis or 10076 normal as well as answered to questionnaire were included for present study. The subjects were divided into 2 groups; Group Ⅰ, normal and Group Ⅱ, metaplastic gastritis. Age, gender, Helicobacter pylori （H pylori） seropositivity, body mass index （BMI）, family history of cancer, smoking, alcohol consumption, total daily calories, folate and salt intake and dietary habit （out-eating, overeating, irregular eating） were retrieved from questionnaire or electronic medical record and compared between group Ⅰ and group Ⅱ. RESULTS： The prevalence of group Ⅱwas 11% （13578/113449） increasing its prevalence with age （P=0.000）. But, there was no significant association between 2 groups in BMI, family history of cancer, alcohol consumption, total daily calories, folate and salt intake and dietary habit （out-eating, overeating, irregular eating）. Old age （P=0.000）, male gender （P=0.000）, H pylori seropositivity （P= 0.010） and current smoker （P=0.000） were significantly more common in group II at multiple logistic regression model. CONCLUSION： Our data suggested that old age, male gender, H pylori seropositivity and smoking were risk factors for metaplastic gastritis, precancerous lesion of gastric cancer.

关键词： Intestinal metaplasia Risk factors

Integrated transcriptome analysis for the hepatic and jejunal mucosa tissues of broiler chickens raised under heat stress conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2022年第6期13卷 1768-1784页

作者： Deok yun Kim Byeonghwi lim Jun-Mo Kim Dong Yong Kil Department of Animal Science and Technology Chung-Ang UniversityAnseong-siGyeonggi-do 17546Republic of Korea

Background:Heat stress(HS)is one of the most important threats for the current poultry ***,many efforts have been made to ameliorate the adverse effect of HS on poultry production;however,physiological and molecular mechanisms pertaining to HS are still limited in ***,the objective of the current study was to investigate functional alterations based on individual and integrated transcriptomes in the liver and jejunal mucosa tissues of broiler chickens exposed to HS ***:Broiler chickens exposed to HS showed decreased growth performance and increased corticosterone concentrations in the *** the transcriptome analysis,the number of differentially expressed genes(DEGs)were identified in the liver and jejunal mucosa by HS *** the liver,genes related to amino acid oxidation,tryptophan metabolism,lipid metabolism,oxidative phosphorylation,and immune responses were altered by HS,which support the reason why heat-stressed poultry had decreased productive *** the jejunal mucosa,genes related to defense systems,glutathione metabolism,detoxification of xenobiotics,and immune responses were differently expressed by HS *** integrated transcriptome analysis with DEGs found in the liver and jejunal mucosa showed a considerable connectivity between the core nodes in the constructed networks,which includes glutathione metabolism,xenobiotic metabolism,carbon metabolism,and several amino acid ***:The core network analysis may indicate that increased requirement of energy and amino acids in the jejunal mucosa of broiler chickens exposed to HS conditions is likely compromised by increased oxidation and synthesis of amino acids in the ***,our results may provide comprehensive insights for molecular and metabolic alterations of broiler chickens raised under HS conditions,which can aid in the development of the novel strategies to ameliorate the negative effect of HS on poultry

关键词： Broiler chicken Heat stress Jejunal mucosa Liver Transcriptome