检索结果-南通市图书馆

Construction and external validation of a nomogram that predicts lymph node metastasis in early gastric cancer patients using preoperative parameters

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Cancer Research 2018年第6期30卷 623-632页

作者： Yinan Zhang Yiqiang Liu ji Zhang Xiaojiang Wu xin ji Tao Fu Ziyu Li Qi Wu Zhaode Bu jiafu ji Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Gastrointestinal Cancer CenterBeijing 100142China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of PathologyBeijing 100142China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Endoscopy CenterPeking University Cancer Hospital&InstituteBeijing 100142China

Objective: To create a nomogram to predict the incidence of lymph node metastasis(LNM) in early gastric cancer(EGC) patients and to externally validate the ***: To construct the nomogram,we retrospectively analyzed a primary cohort of 272 EGC *** analysis and a binary logistic regression were performed.A nomogram predicting the incidence of LNM in EGC patients was *** discrimination ability of the nomogram was measured using the concordance index(c-index),and the nomogram was also ***,another prospective cohort of 81 patients was analyzed to validate the ***: In the primary cohort,LNM was pathologically confirmed in 37(13.6%) *** multivariate analysis,the presence of an ulcer,the maximum lesion diameter observed via gastroscopy,the thickness of the lesion observed via endoscopic ultrasonography,and the presence of enlarged lymph nodes on computed tomography(CT) were independent risk factors for LNM.A nomogram was then created based on the regression model with the c-index of 0.905,and the calibration curve of the nomogram fell approximately on the ideal 45-degree *** cut-off score of the nomogram was 110,and the sensitivity,specificity,positive predictive and negative predictive values of the nomogram in the primary cohort were 81.1%,86.0%,47.6% and 96.7%,respectively,and in the prospective validation cohort were 75.0%,91.0%,60.0% and 95.5%,*** calibration curve of the external validation cohort was almost on the 45-degree ***: We developed an effective nomogram predicting the incidence of LNM for EGC patients.

关键词： Early gastric cancer lymph node metastasis nomogram validation

Energy dissipation and power deposition of electromagnetic waves in the plasma sheath

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2021年第1期23卷 70-80页

作者： jiahui ZHANG xin ji Keyuan YANG Lei SHI Qingxia WANG School of Aerospace Science and Technology Xidian UniversityXi’an 710071People’s Republic of China China Academy of Space Technology Xi’an 710100People’s Republic of China

Energy dissipation and power deposition of electromagnetic waves(EMW)in the reentry plasma sheath provide an opportunity to investigate‘communication blackout’*** on afinite element method(FEM)simulation,we analyze variation of EMW energy dissipation and power deposition profiles dependent on the wave polarization,wave incident angle,plasma density profile and electron collision *** and resonance of EMW in the plasma sheath are crucial in explaining the regulation of energy dissipation and power deposition.

关键词： electromagnetic wave power deposition plasma sheath

Model predictive control with an on-line identification model of a supply chain unit

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第5期11卷 394-400页

作者： jian NIU Zu-hua XU Jun ZHAO Zhi-jiang SHAO ji-xin QIAN State Key Lab of Industrial Control Technology Zhejiang University Hangzhou 310027 China

A model predictive controller was designed in this study for a single supply chain unit.A demand model was described using an autoregressive integrated moving average(ARIMA) model,one that is identified on-line to forecast the future *** was used to modify the demand prediction,and profit was chosen as the control *** imitate reality,the purchase price was assumed to be a piecewise linear form,whereby the control objective became a nonlinear *** addition,a genetic algorithm was introduced to solve the *** were put on the predictive inventory to control the inventory fluctuation,that is,the bullwhip effect was *** model predictive control(MPC) method was compared with the order-up-to-level(OUL) method in *** results revealed that using the MPC method can result in more profit and make the bullwhip effect controllable.

关键词： Supply chain Model predictive control On-line identification Optimization with constraint Piecewise linear price

Fibrinogen to be a laboratory screening biomarker for polycystic ovary syndrome(PCOS) patients:a Meta-analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Reproduction and Contraception 2015年第2期26卷 91-101页

作者： xin ji Bin ZHANG Chun-mei YING Department of Laboratory Medicine Obstetrics and Gynecology Hospital of Fudan University

Objective To assess the fibrinogen levels in polycystic ovary syndrome （PCOS） patients and to fgure out the potential of fibrinogen to be an early phase laboratory biomarker for PCOS diagnosis. Methods A systemic literature research was performed from databases of Medline via OVID, PubMed, Web of Knowledge and the Cochrane library databases, etc. Fifteen studies including 694 PCOS patients and 548 normal controls were selected after quality assessment. Data of fibrinogen levels, age and body weight were extracted and analyzed systemically. Results Fibrinogen increases in PCOS patients with regard to data poolings of overall studies （mean difference=21.51, 95%CI=3.78-39.25, P=0.02）, National Institutes of Health （NIH）-based studies （mean difference=8. 50, 95%CI=0.91-16. 09, P= 0. 03） and Rotterdam-based studies （mean difference=45.61, 95%CI=12.18-79.03, P=0.007） respectively. PCOS patients are younger （mean difference= -2.15, 95%CI= -3.65 - -0. 64, P=0. 005） and with heavier body weight （mean difference=0.92, 95%CI=0.59- 1.25, P〈0.001） than normal controls. Conclusions Increasing in PCOS patients, fibrinogen might be used as a diagnosis biomarker for PCOS, especially in the population with younger age and heavier body weight, which indicates that fibrinogen might be used as an early phase laboratory screening biomarker in clinical practice.

关键词： fibrinogen polycystic ovary syndrome (PCOS) diagnosis

Synthesis and NO production inhibition of novel Mannich base derivatives of irisolidone

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第4期19卷 387-389页

作者： jiao Wang Ying Zhong Lu Liu xin Quan ji Zhi Guo Zhang Institute of Materia Medica Shandong Academy of Medical SciencesJinan 250062China The National Center for Drug Screening Shanghai 201203China Pharmacological Institute of New Drugs School of PharmacyShandong UniversityJinan 250012China

Five new C-8 Mannich base derivatives of irisolidone 2a-2e were synthesized and their nitric oxide（NO）production inhibitory activity was *** 2a,2b,2c and 2e displayed stronger activities in vitro than the parent com... 详细信息

关键词： Irisolidone Mannich reaction Mannich base Nitric oxide(NO)production inhibition

A Monte Carlo Study of the Evolution of the Scale Height of Normal Pulsars in the Galaxy

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2005年第6期5卷 610-618页

作者： Ying-Chun Wei xin-ji Wu Qiu-He Peng Na Wang jin Zhang National Astronomical Observatories/Urumqi Observatory Chinese Academy of SciencesUrumqi 830011 Department of Astronomy Peking University Beijing 100871 Department of Astronomy Nanjing University Nanjing 210093

Based on the undisturbed, finite thickness disk gravitational potential, we carried out 3-D Monte Carlo simulations of normal pulsars. We find that their scale height evolves in a similar way for different velocity dispersions （δv）： it first increases linearly with time, reaches a peak, then gradually decreases, and finally approaches a stable asymptotic value. The initial velocity dispersion has a very large influence on the scale height. The time evolution of the scale height is studied. When the magnetic decay age is used as the time variable, the observed scale height has a similar trend as the simulated results in the linear stage, from which we derive velocity dispersions in the range 70 - 178km s^-1, which are near the statistical result of 90 - 270km s^-1 for 92 pulsars with known transverse velocities. If the characteristic age is used as the time variable, then the observed and theoretical curves roughly agree for t 〉 10^8 yr only if av 〈 25km s^-1.

关键词： pulsar general - stars evolution - Galaxy structure - Galaxy disk

Prediction of M–A Constituents and Impact Toughness in Stir Zone of X80 Pipeline Steel Friction Stir Welds

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2023年第4期36卷 573-585页

作者： Xueli Wang xin ji Bin He Dongpo Wang Chengning Li Yongchang Liu Wei Guan Lei Cui Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300354China

This study explored a strategy for predicting the proportion of martensite–austenite(M–A)constituents and impact toughness of stir zone(SZ)on X80 pipeline steel joints welded by friction stir welding(FSW).It is found that the welding forces,including the traverse force(F_(x)),the lateral force(F_(y))and the plunge force(F_(z)),are the key variables related to the change of welding parameters and influence remarkably the characteristics of M–A constituents and impact toughness of *** impact toughness of SZ is commonly lower than that of the base material due to the formation of lath bainite and coarsening of *** characteristics of M–A constituents in SZ are sensitive to the variation of welding parameters and respond well to the change of welding *** proportion of small island M–A constituents increases with the decrease in rotational speed and the increase in *** increase in the amount of island M–A constituents is beneficial to improve the impact toughness of *** on the above findings,a machine learning(ML)model for predicting the M–A constituents and impact toughness is constructed using the force features as the input data *** force data-driven ML model can predict the M–A constituents and impact toughness precisely and exhibits higher accuracy than ML built with welding *** is believed that the high accuracy is achieved because the force features include more details of FSW process,such as the heat generation,material flow,plastic deformation,and so on,which govern the microstructural evolution of SZ during FSW.

关键词： Friction stir welding Pipeline steel Welding force M-A constituents Impact toughness

Effects of annealing on the texture and anisotropy of unidirectional rolled Mo-La alloys

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tungsten 2020年第3期2卷 301-306页

作者： Cheng Liu Yao‑xin ji Zhuang‑Zhi Wu De‑Zhi Wang School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Ministry of Education for Non‑Ferrous Materials Science and Engineering Central South UniversityChangsha 410083China

Deformation texture plays an important influence on the mechanical properties and the anisotropy over Mo-La alloy *** this work,Mo-La plates prepared by powder metallurgy process are unidirectionally rolled and annealed at various *** the texture,microstructure,mechanical properties,anisotropy and the correlation of Mo-La plates for the rolled and annealed states at different temperatures are analyzed and *** results show that unidirectionally rolled Mo-La plates form grain orientation dominated by{001}and the texture types are not changed during *** the increase of annealing temperatures,the orientation density of texture is increased first and then decreased,which is related to the movement of dislocations and the orientation of new nucleation grains is affected by the original rolled *** anisotropy of Mo-La plates is significantly weakened after being annealed,which is caused by the combined effects of the annealing texture,grain size,grain shape and dislocations.

关键词： Mo–La plates Unidirectionally rolling Annealing Texture Anisotropy

Altered Brain Regional Homogeneity Following Contralateral Acupuncture at Quchi (LI 11) and Zusanli (ST 36) in Ischemic Stroke Patients with Left Hemiplegia: An fMRI Study

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2020年第1期26卷 20-25页

作者： CHEN Shu-qi CAI De-chun CHEN ji-xin YANG Han LIU Lian-sheng Medical Imaging Department The First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou510405China Medical College of Acu・Moxi and Rehabilitation Guangzhou University of Chinese MedicineGuangzhou510006China Artemisinin Research Center Guangzhou University of Chinese Medicine510006China The Second Clinical College Guangzhou University of Chinese MedicineGuangzhou510006China

Objective: To study the effect of contralateral acupuncture(CAT) at acupoints of Quchi(LI 11) and Zusanli(ST 36) on the unaffected limbs of ischemic stroke patients with left hemiplegia based on regional homogeneity(ReHo) indices. Methods: Ten ischemic stroke patients with left hemiplegia received CAT on right side at LI 11 and ST 36. Functional magnetic resonance imaging(fMRI) was performed before and after acupuncture. A ReHo analytical method was used to compare brain responses of patients before and after CAT operated by REST software. Results: The stimulation at both LI 11 and ST 36 on the unaffected limbs produced significantly different neural activities. CAT elicited increased ReHo values at the right precentral gyrus and superior frontal gyrus, decreased ReHo value at right superior parietal lobule, left fusiform gyrus and left supplementary motor area. Conclusions: Acupuncture at one side could stimulate bilateral regions. CAT could evoke the gyrus which was possibly related to motor recovery from stroke. A promising indicator of neurobiological deficiencies could be represented by ReHo values in post-stroke patients.

关键词： contralateral acupuncture ischemic stroke functional magnetic resonance imaging regional homogeneity