检索结果-南通市图书馆

Music Genre Classification Using DenseNet and Data Augmentation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第10期47卷 657-674页

作者： Dao Thi le Thuy Trinh Van Loan Chu Ba Thanh Nguyen Hieu cuong Faculty of Information Technology University of Transport and CommunicationsHanoi100000Vietnam School of Information and Communication Technology Hanoi University of Science and TechnologyHanoi100000Vietnam Faculty of Information Technology University of Technology and Education Hung Yen160000Vietnam

It can be said that the automatic classification of musical genres plays a very important role in the current digital technology world in which the creation,distribution,and enjoyment of musical works have undergone huge *** the number ofmusic products increases daily and themusic genres are extremely rich,storing,classifying,and searching these works manually becomes difficult,if not *** classification ofmusical genres will contribute to making this *** research presented in this paper proposes an appropriate deep learning model along with an effective data augmentation method to achieve high classification accuracy for music genre classification using Small Free Music Archive(FMA)data *** Small FMA,it is more efficient to augment the data by generating an echo rather than pitch *** research results show that the DenseNet121 model and data augmentation methods,such as noise addition and echo generation,have a classification accuracy of 98.97%for the Small FMA data set,while this data set lowered the sampling frequency to 16000 *** classification accuracy of this study outperforms that of the majority of the previous results on the same Small FMA data set.

关键词： Music genre classification Small FMA DenseNet CNN GRU data augmentation

Relationship between skin fold thickness and insulin resistance in the essential hypertensive patients in Vietnam

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 Geriatric Cardiology 2005年第4期2卷 228-232页

作者： Toan C Nguyen Khoa TA Pham Quyen TL Do cuong T Nguyen Diep D Nguyen Vinh G le Cong D Nguyen Vietnam Military Medical University

Background Previous studies reported a close relationship between obesity and insulin resistance in the essential hypertensive patients. Objective In this study, we examined the relationship between the skin fold thickness and insulin resistance then developed a formula to estimate the insulin resistance index according to the skin fold thickness in the essential hypertensive patients. Subjects and Methods Medical records of 80 patients (37 males, 43 females) were reviewed and the data were tabulated. Anthropometric indexes (including height, weight, waist circumference, hip circumference, and skins fold thickness at 5 fatty difference points on the Erdheim diagram), fasting plasma glucose and insulin concentration were recorded. The mean age was 57.0 ?9.2 years. The insulin resistance index was calculated following the Homeostasis Model Assessment (HOMA) formula. Results Compared with the group with BMI le and female was observed (P > 0.05). There was a positive correlation between skin fold thickness and the fasting insulin concentration and insulin resistance index. The skin fold thickness at point A8 had the best coefficient correlated with fasting plasma insulin(r=0.79, P level of insulin resistance. (J Geriatr Cardiol 2005; 2(4):228-232 )

关键词： skin fold thickness, insulin resistance, hypertension

Prolonged post-thaw culture of embryos does not improve outcomes of frozen human embryo transfer cycles: A prospective randomized study

在线全文

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2019年第6期8卷 260-266页

作者： Minh Tam le Van Trung Nguyen Thanh Tung Nguyen MBlake EVans Thai Thanh Thi Nguyen Tam AnThi Nguyen dinh Duong le Vu Quoc Huy Nguyen Ngoc Thanh Cao Micah J.Hill Department of Obstetrics and Gynecology Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Center for Reproductive Endocrinology and Infertility Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Department of Histology and Embryology Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Walter Reed National Military Medical Center 8901 Rockville PikeBethesdaMD20889USA Department of Public Health Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam

Objective:To evaluate the impact of prolonged post-thaw embryos culture on pregnancy outcome during frozen embryo transfer ***:This prospective cohort study evaluated 324 thaw transfer cycles with 819 embryos from 269 patients at the Center for Reproductive Endocrinology and Infertility of Hue University Hospital in *** frozen embryo transfer cycles were divided into two groups at the time of thawing:the short culture group(2-hour post-thaw culture)and the overnight culture group(overnight culture for 18 h)before the embryo was transferred into the *** rates of embryo intact,grade A embryo at frozen and transfer time and continuing cleavage were *** clinical outcomes including serum beta-human chorionic gonadotropin,clinical pregnancy and implantation rate were evaluated after 14 days,4 weeks,6 weeks,respectively,after embryo ***:Human chorionic gonadotropin positive occurred in 39.5%of patients in the short culture group compared to 25.9%in the overnight culture group with risk difference(RD)=13.6%,relative risk(RR)=1.343,95%confidence interval(CI)1.085-1.663,P<*** pregnancy rate of the short culture group and overnight culture group was 33.3%and 24.1%,respectively(RD=9.2%,RR=1.242,95%CI 0.996-1.549,P=0.06)and the implantation rate in the short culture group and overnight culture group was 16.5%and 11.0%,respectively(RD=5.5%,RR=1.244,95%CI 1.046-1.479,P=0.01).In women of advanced age(≥35 years)and women who received 3 embryos,pregnancy outcomes were found to be significantly(P<0.05)higher in the short culture than in the overnight culture ***:The prolonged post-thaw culture period does not increase pregnancy outcome in comparison with the short culture.

关键词： Embryo vitrification Post-thaw culture Frozen embryo transfer Biochemical pregnancy rate Clinical pregnancy rate Implantation rate

Combined transarterial chemoembolization and stereotactic body radiation therapy as a bridge therapy to liver transplant for hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatoma Research 2020年第8期6卷 36-45页

作者： Bui Quang Bieu Nguyen dinh Chau Nguyen Xuan Kien le Van Thanh Vu Van Quang Thai Doan Ky Nguyen Tien Thinh Mai Hong Bang Department of Radiation Oncology and Radiosurgery Military Central Hospital 108Hanoi 100000Vietnam Department of Hepatobiliary and Pancreatic Surgery Military Central Hospital 108Hanoi 100000Vietnam Department of Gastroenterology and Hepatobiliary Military Central Hospital 108Hanoi 100000Vietnam.

Liver transplant(LT)is the curative treatment for patients with hepatocellular carcinoma(HCC).Bridge therapies are local treatments given to patients on the LT waitlist,to prevent tumor progression and to reduce the dropout *** presentation:We reported a 40-year-old man diagnosed with Barcenola-Clinic Liver Cancer BCLC intermediate stage HCC and Child-Pugh A5 hepatitis B virus cirrhosis who underwent combined bridge therapies to ***,the patient received transarterial chemoembolization(TACE)for two times and showed a partial *** he underwent stereotactic body radiation therapy(SBRT)with a total dose of 45 Gy in 3 *** months later,the tumor size and serum protein induced by Vitamin K absence or antagonists-II,alpha fetoprotein levels decreased *** June 2019 a suitable donor was found and his LT was successfully ***:We propose that a combination of TACE and SBRT was feasible as bridge therapy for HCC patients on the LT waitlist.

关键词： Transarterial chemoembolization stereotactic body radiation therapy bridge therapy hepatocellular carcinoma liver transplant

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

拖拉机前桥半主动悬架特性参数匹配与控制

农业机械学报 2013年第12期44卷 6-10,5页

作者：马然朱思洪 Do Minh cuong 江苏师范大学机电工程学院徐州221116 南京农业大学工学院南京210031

针对拖拉机减振性能差的问题,以定位阀输入电压与磁流变减振器励磁电流作为半主动悬架特性参数,进行了参数匹配台架试验。基于匹配试验结果,提出频域快速控制策略,采用LabView作为软件开发平台,以PCI6024E型数据采集卡为核心设计了半主... 详细信息

针对拖拉机减振性能差的问题,以定位阀输入电压与磁流变减振器励磁电流作为半主动悬架特性参数,进行了参数匹配台架试验。基于匹配试验结果,提出频域快速控制策略,采用LabView作为软件开发平台,以PCI6024E型数据采集卡为核心设计了半主动悬架控制系统,进行了试验验证。结果表明,定位阀输入电压与磁流变减振器励磁电流的合理匹配,可明显衰减悬架动态特性响应;所设计的半主动悬架控制系统能有效抑制簧载质量的垂向振动,改善拖拉机减振性能。

关键词：拖拉机半主动悬架参数匹配频域快速控制 LabView 台架试验

DNA cyclic codes over the ring F2[u, v]/ （u^2 - 1, v^3 - v, uv - vu）

在线全文

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2018年第3期11卷 247-265页

作者： Hai Q. dinh Abhay Kumar Singh Sukhamoy Pattanayak Songsak Sriboonchitta Division of Computational Mathematics and Engineering Institute for Computational Science Ton Duc Thang University Ho Chi Minh City Vietnam Faculty of Mathematics and Statistics Ton Duc Thang University Ho Chi Minh City Vietnam Department of Mathematical Sciences Kent State University 4314 Mahoning Avenue Warren Ohio 44483 USA Department of Applied Mathematics Indian Institute of Technology (ISM) Dhanbad 826004 India Faculty of Economics Chiang Mai University Chiang Mai 52000 Thailand

In this paper, our main objective is to find out the necessary and sufficient conditions for a cyclic code of arbitrary length over the ring of four elements R1 = F2 ＋ u2 （u^2 = 1） to be a reversible cyclic code. We also obtain the structure of cyclic DNA codes of odd length over the ring R = F2 [u, v]/（u^2 -1, v^3 -v, uv- vu）, which plays an important role in Computational Biology. Furthermore, we establish a direct link between the elements of ring /{ and 64 codons used in the amino acids of living organisms by introducing a Gray map from R to R1. Among others, binary images of cyclic codes over R are also investigated. As applications, some cyclic DNA codes over R using the Gray map are provided.

关键词： Cyclic DNA codes reversible cyclic codes reversible-complement cyclic codes gray map.

Effect of thinning intensity on tree growth and temporal variation of seed and cone production in a Pinus koraiensis plantation

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 Forestry Research 2019年第3期30卷 835-845页

作者： Thanh Tuan Nguyen dinh Tien Tai Peng Zhang Muhammad Razaq Hai-Long Shen School of Forestry Northeast Forestry University Harbin 150040People’s Republic of China Department of Forestry Vietnam Forestry University-Second CampusOkayamaDongnai 810000Vietnam Graduate School of Environmental and Life Science Okayama UniversityOkayamaJapan

Thinning of Korean pine (Pinus koraiensis Sieb. et Zucc.) is used to facilitate timber and cone production. The present study in Northeast China investigated the effects of thinning intensity on individual tree growth, temporal variation in cone yield, and seed quality in Korean pine plantation. In 2005, five thinning intensity levels (none, extreme, heavy, moderate and light) were set in 15 permanent plots in a 32-year-old Korean pine plantation at Mengjiagang Forest Farm, Jiamusi City, Heilongjiang Province. We recorded tree growth and seed cone production from 2013 to 2016, i.e., from 8 to 11 years after thinning. Except for height growth, thinning increased tree growth (diameter at breast height and crown size) and improved cone yield. The extreme thinning treatment (to 300 trees per hectare) resulted in the largest tree diameter, tree volume, crown size and 4-year cone production per tree. The highest cone yield per tree in the mast year (2014) was observed when stands were thinned to 500 trees per hectare (heavy thinning). Although the best cone and seed quality and the largest cone and seed mass per tree were recorded in the heavily thinned stand, no significant differences were found between heavy and moderate thinning stands (750 trees per hectare). At the stand level, the moderately thinned stand had the highest basal area, stock volume and seed cone production per stand. Our results suggest that thinning to 750 trees per hectare will improve timber and cone productivity in 40-year-old P. koraiensis stands.

关键词： Korean pine Thinning intensity Seed yield Tree growth Temporal variation in cone yield

Evaluation of the Ability to Apply Near-Infrared Spectroscopy on Direct Assay of Acyclovir in Tablets

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmacy and Pharmacology 2017年第12期5卷 841-849页

作者： le dinh Chi Tran Viet Hung Bui Van Trung Doan Cao Son . The Department of Analytical Chemistry and Toxicology Hanoi University of Pharmacy Hanoi 110403 Vietnam Director Institute of Drug Quality Control Ho Chi Minh City Ho Chi Minh City 712161 Vietnam The Laboratory of Physical Measurements National Institute of Drug Quality Control Hanoi 110116 Vietnam Director National Institute of Drug Quality Control Hanoi 110116 Vietnam

This paper aimed at developing a simple and fast approach using chemometrics processing for direct assay of acyclovir in tablets by NIR （near infrared） spectroscopy in diffuse reflectance mode. In making trials with 5 different tablet matrices, the experimental results showed that regardless the matrix variation, it was always possible to construct a quantitative model with suitable linear range, accuracy and precision for direct assay of acyclovir in tablet from NIR spectra. Therefore, the approach used in this study was suitable for on-site fast assay of APIs in tablets during manufacturing process or in post-marketing surveillance of drug quality.

关键词： Near-infrared spectroscopy chemometrics acyclovir tablet partial least square regression direct assay.

Intermetallic Evolution of Al–Si-Coated Hot Stamping Steel During Modified Electrically Assisted Rapid Heating

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English letters) 2018年第12期31卷 1327-1333页

作者： Kieu-Anh dinh Sung-Tae Hong Tien Viet Luu Moon-Jo Kim Heung Nam Han School of Mechanical Engineering University of Ulsan Liquid Processing & Casting R&D Group Korea Institute of Industrial Technology Department of Materials Science and Engineering RIAMSeoul National University

Modified electrically assisted(EA) rapid heating of Al–Si-coated hot stamping steel is suggested, and the intermetallic evolution in the coating during heating is experimentally investigated. In the modified EA rapid heating, a continuous electric current for a suitable duration is applied to a specimen to heat it to a temperature slightly below the melting temperature of the coating. The temperature of the specimen is then kept constant for a specified dwell time. The result of the microstructural analysis shows that the modified EA rapid heating could effectively increase the thickness of the intermetallic layer between the coating and steel substrate much faster than conventional furnace heating and induction heating. The effectiveness of EA rapid heating may be due to the athermal effect of the electric current on the mobility of atoms, in addition to the well-known resistance heating effect. EA rapid heating also provides a technical advantage in that partial austenization can be easily achieved by properly placing the electrodes, as demonstrated in the present study.

关键词： Hot stamping Electrically assisted rapid heating Partial austenization Al–Si-coated hot stamping steel