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An active method suppressing rolling mill vibration: disturbance estimation and compensation algorithm

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Journal of Iron and Steel Research International 2019年第7期26卷 697-703页

作者： Xiao-qiang Yan Jie-bin Qi xin-xin wang School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

The rolling mill vibration not only seriously causes the strip thickness heterogeneity, but also damages the rolling mill equipment and its electrical components. Existing vibration suppression methods are passive and mainly tune mechanical, hydraulic, electrical and rolling process parameters. A new active vibration suppression method was thus proposed using the disturbance estimation and compensation algorithm. Firstly, the hydraulic-mechanical coupling model of the rolling mill vibration was established, and an active vibration suppressor was designed based on the extended state observer. Then, through the numerical simulation, it is found that the vibration energy is reduced by 35.3% using the vibration suppressor, and the vibration suppressor is valid when the vibration frequency is lower than 60 Hz Finally, the vibration suppressor was applied to the in-site manufacturing, and the expected vibration suppression was obtained. The method makes the produced steel strip have more uniform thickness and further significantly increases the finished product ratio.

关键词： Rolling mill vibration Active vibration suppression Disturbance estimation Compensation algorithm Extended state observer

Investigating the Nucleation Effect of DMDBS on Syndiotactic Polypropylene from the Perspective of Chain Conformation

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Chinese Journal of Polymer Science 2020年第12期38卷 1355-1364页

作者： xin-xin wang Jian-Jun Yi Li wang Yuan Yuan Jia Chun Feng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China Laboratory for Synthetic Resin Research Petrochina Petrochemical Research Institute Beijing 102200China

The mechanism of nucleating agents(NAs)accelerating the crystallization of semi-crystlline polymers has received continuous attention due to the extreme importance in academic research and industry *** this work,the nucleation effect and probable mechanism of 1,3.2,4 bis(3,4-dimethylbenzylidene)sorbitol(DMDBS)on promoting the crystallization of syndiotactic polypropylene(sPP)was systematically *** results showed that DMDBS could significantly accelerate the crystallization process and did not change the crystalline form of *** in situ infrred spectra recorded in the crystallization process showed that in pristine sPP the tttt conformers decreased and the tgg conformers increased *** sPP/DMDBS system,DMDBS could promote the increase of tgg conformers rather than the decrease of tttt *** further analysis by 2D-IR spectra revealed that ttgg conformers increased prior to the decrease of tttt conformers in the sPP/DMDBS system comparing with pristine *** that ttgg conformers were basic elements of helical conformation of Form I crystal for sPP,we proposed a probable nucleation mechanism of DMDBS for sPP:DMDBS could stabilize the ttgg conformers which induced these ttgg conformers to pre-orientate and aggregate into helical conformation sequences as initial nuclei quickly and early to promote the sPP *** work provides some new insights into the nucleation mechanism of NAs for sPP.

关键词： Syndiotactic polypropylene Nucleating agent Crsallization Conformation

Molecular Mapping of a Gene for Resistance to Stripe Rust in Wheat Variety PIW138

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Agricultural Sciences in China 2010年第9期9卷 1285-1291页

作者： YUE Yan-li YAO Zhan-jun REN xin-xin wang Li College of Agronomy Agricultural University of Hebei Baoding 071001 P.R.China

Stripe rust, caused by Puccinia striiformis f. sp. tritici （Pst）, is one of the most damaging diseases of common wheat （Triticum aestivum L.）. Wheat variety PIW138 introduced from Pakistan is resistant to the currently prevailing Pst race CYR32 in China. In this study, the bulked segregant analysis （BSA） method and simple sequence repeat （SSR） markers were used to map the stripe rust resistance gene in PIW138. The resistant and susceptible DNA bulks were prepared from the segregating F2 population of the cross between Thatcher, a susceptible variety as the female parent, and PIW138 as the male parent. The segregation of resistant and susceptible F2 plants inoculated with CYR32 indicated that single dominant gene determined the reactions of PIW138 line and temporarily designated as YrP138. Total 200 SSR primers were screened, and 4 SSR markers, Xwmc52, Xbarc61, Xgwm268, and Xgwm153, on chromosome 1B were found to be polymorphic between the resistant and the susceptible DNA bulks as well as their parents. Genetic linkage was tested on the segregating F2 population with 259 plants, including 196 resistant and 63 susceptible plants. All 4 SSR markers were linked to the stripe rust resistance gene in PIW138. The genetic distances of Xwmc52, Xbarc61, Xgwm268, and Xgwm153 to the resistance gene were 29.8, 6.2, 6.8, and 8.2 cM, respectively.

关键词： wheat Puccinia striiformis f. sp. tritici resistance gene microsatellite marker

Emergency surgical workflow and experience of suspected cases of COVID-19: A case report

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World Journal of Clinical Cases 2020年第21期8卷 5361-5370页

作者： Di Wu Tian-Yu Xie Xue-Hong Sun xin-xin wang Department of General Surgery Chinese PLA General HospitalBeijing 100853China School of Medicine Nankai UniversityTianjin 300071China Department of Surgery Jiaocheng Medical Group HospitalLvliang030500Shanxi ProvinceChina

BACKGROUND Severe acute respiratory syndrome coronavirus 2 has been confirmed to be a newly discovered zoonotic pathogen that causes highly contagious viral pneumonia,which the World Health Organization has named novel coronavirus *** its outbreak,it has become a global *** the outbreak of coronavirus disease 2019(COVID-19),however,there is no mature experience or guidance on how to carry out emergency surgery for suspected cases requiring emergency surgical intervention and perioperative safety protection against *** SUMMARY A 41-year-old man was admitted to the hospital for emergency treatment due to"3-d abdominal pain aggravated with cessation of exhaust and defecation".After improving inspections and laboratory tests,the patient was assessed and diagnosed by the multiple discipline team as"strangulation obstruction,pulmonary infection”.His body temperature was 38.8℃,and the chest computed tomography showed pulmonary *** fever and pneumonia,we could not rule out COVID-19 after consultation by fever clinicians and respiratory ***,we performed emergency surgery under three-level protection for the suspected *** surgery,his nucleic acid test for COVID-19 was negative,meaning COVID-19 was excluded,and routine postoperative treatment and nursing was *** patient was treated with symptomatic support after the *** stomach tube and urinary tube were removed on the 1st d after the *** clearing diet was started on the 3rd d after the operation,and the body temperature returned to *** and bowel movements were noted on 5th postoperative *** was discharged after 8 d of *** patient was followed up for 4 mo after discharge,no serious complications occurred.A 71-year-old woman was admitted to our emergency room due to"abdominal distention,fatigue for 6 d and fever for 13 h".After the multiple discipline team evaluation,the patient was diagnosed as"intestinal obstr

关键词： COVID-19 Emergency surgery Treatment flowchart Perioperative protection Case report

Electrical and Optical Characteristics of Electrodeless Lamp

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高压电器 2011年第9期47卷 12-18页

作者： wang Chang-quan ZHANG Gui-xin DONG Jin-yang SHAO Ming-song wang xin-xin wang Zan-ji Department of Electrical Engineering Tsinghua University Beijing 100084 China

In order to study the methods to enhance the efficacy of electrodeless lamp,volt-ampere characteristics,illuminance and emission spectrum have been investigated in home-built electrodeless lamp experimental system with an electrodeless lamp in shape like QL 85 *** results show that lamp current increases as lamp voltage increases in non-discharge,the current decreases first and then increases as the voltage increases in *** illuminance of electrodeless lamp increases linearly with discharge power increasing,and it decreases linearly with power *** emission spectrum is different for different bulb and lighting *** spectrum of Ar 811.5 nm,76.5 nm,750.4 nm and Hg 313.2 nm decrease with lighting *** the intensity of Hg 407.8 nm increases with lighting time.

关键词： electrodeless lamp volt-ampere characteristics illuminance emission spectrum efficacy

Prognostic value of 11-factor modified frailty index in postoperative adverse outcomes of elderly gastric cancer patients in China

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World Journal of Gastrointestinal Surgery 2023年第6期15卷 1093-1103页

作者： Zi-Yao Xu xin-Yu Hao Di Wu Qi-Ying Song xin-xin wang Department of General Surgery The First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Anesthesiology The First Medical Center of Chinese PLA General HospitalBeijing 100853China

BACKGROUND Preoperative evaluation of frailty is limited to a few surgical ***,the evaluation in Chinese elderly gastric cancer(GC)patients remains *** To validate and estimate the prognostic value of the 11-index modified frailty index(mFI-11)for predicting postoperative anastomotic fistula,intensive care unit(ICU)admission,and long-term survival in elderly patients(over 65 years of age)undergoing radical *** This study was a retrospective cohort study which included patients who underwent elective gastrectomy with D2 Lymph node dissection between April 1,2017 and April 1,*** primary outcome was 1-year all-cause *** secondary outcomes were admission to ICU,anastomotic fistula,and 6-mo *** were divided into two groups according to the optimal grouping cutoff of 0.27 points from previous studies:High risk of frailty marked as mFI-11High and low risk of frailty marked as *** curves between the two groups were compared,and univariate and multivariate regression analyses were performed to explore the relationship between preoperative frailty and postoperative complications in elderly patients undergoing radical *** discrimination ability of the mFI-11,prognostic nutritional index,and tumornode-metastasis pathological stage to identify adverse postoperative outcomes was assessed by calculating the area under the receiver operating characteristic(ROC)*** A total of 1003 patients were included,of which 13.86%(139/1003)were defined as having mFI-11High and 86.14%(864/1003)as having *** comparing the incidence of postoperative complications in the two groups of patients,it was found that mFI-11High patients had higher rates of 1-year postoperative mortality,admission to ICU,anastomotic fistula,and 6-mo mortality than the mFI-11Low group(18.0%vs 8.9%,P=0.001;31.7%vs 14.7%,P<0.001;7.9%vs 2.8%,P<0.001;and 12.2%vs 3.6%,P<0.001).Multivariate analysis revealed mFI-11 as an independent pr

关键词： Gastric cancer Frailty Mortality Anastomotic fistula Elderly

Pancreas-preserving duodenectomy for treatment of a duodenal papillary tumor:A case report

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World Journal of Clinical Cases 2021年第18期9卷 4748-4753页

作者： Biao Wu Shi-Yong Chen Yuan Li Yu He xin-xin wang Xiao-Jun Yang Department of General Surgery Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina School of Clinical Medicine Ningxia Medical UniversityYinchuan 750000Ningxia Hui Autonomous RegionChina

BACKGROUND Duodenal papillary tumor is a rare tumor of the digestive tract,accounting for about 0.2%of gastrointestinal tumors and 7%of periampullary *** clinical manifestations of biliary obstruction are most *** benign tumors or small malignant tumors are often not easily found because they have no obvious symptoms in the early *** resection is the only treatment for duodenal papillary *** present,the methods of operation for duodenal papillary tumors include pancreatoduodenectomy,duodenectomy,ampullectomy,and endoscopic *** SUMMARY A 47-year-old man was admitted to because of a duodenal mass that had been discovered 2 mo *** gastroscopy at another hospital revealed a duodenal papillary mass that had been considered to be a high-grade intraepithelial ***,we conducted a multidisciplinary group discussion and decided to perform a pancreas-preserving duodenectomy and a R0 resection was successfully *** surgery,the patient underwent a follow-up period of 5 *** recurrence or metastasis *** According to our experience with a duodenal papillary tumor,compared with pancreaticoduodenectomy,the use of pancreas-preserving duodenectomy can preserve pancreatic function,maintain gastrointestinal structure and function,reduce tissue damage and complications,and render the postoperative recovery ***-preserving duodenectomy for treatment of a duodenal papillary tumor is feasible under strict control of surgical indications.

关键词： Duodenal papillary tumor Benign tumor Malignant tumor Pancreaspreserving duodenectomy Case report

Giant hemangioma of the caudate lobe of the liver with surgical treatment:A case report

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World Journal of Clinical Cases 2021年第21期9卷 5980-5987页

作者： xin-xin wang Bao-Long Dong Biao Wu Shi-Yong Chen Yu He Xiao-Jun Yang Department of General Surgery Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina Gansu University of Chinese Medicine The 1st Clinical Medicine CollegeLanzhou 730000Gansu ProvinceChina Peoples Clinical Medicine College Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Gansu Key Laboratory of Molecular Diagnostics and Precision Medicine for Surgical Oncology Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina Gansu Research Center of Prevention and Control Project for Digestive Oncology Gansu Provincial HospitalLanzhou 730000Gansu ProvinceChina

BACKGROUND Caudate lobe hemangioma of the liver is relatively *** to the unique anatomical location of the caudate lobe,the caudate lobectomy accounts for only 0.5%to 4%of hepatic resection,which is difficult to operate and takes a long time,and even has many postoperative *** SUMMARY A 34-year-old female presented with a 1 year history of intermittent pain in the right side of the waist without obvious *** laboratory blood tests were within normal *** green 15 min retention was rated 2.9%,and Child-Pugh was rated *** tomography and magnetic resonance imaging diagnosed giant hemangioma of the caudate lobe with hemangioma of left lobe of *** discussion,surgical treatment was performed,which lasted 410 min,with intraoperative bleeding of about 600 mL and postoperative pathological findings of cavernous *** were no obvious postoperative complications,and the patient was discharged 10 d after *** Caudate lobectomy is difficult due to its special anatomical *** the condition of fully exposing the anatomy of the first porta hepatis,the second porta hepatis,the third porta hepatis,the fourth porta hepatis and middle hepatic vein and combining with the Pringle maneuver,caudate lobectomy can be performed in a precise and safe process.

关键词： Caudate lobe hemangioma Caudate lobectomy Case report

Incorporation of perigastric tumor deposits into the TNM staging system for primary gastric cancer

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World Journal of Gastrointestinal Oncology 2023年第9期15卷 1605-1615页

作者： Yang Li Shuo Li Lu Liu Li-Yu Zhang Di Wu Tian-Yu Xie xin-xin wang Medical School of Chinese People's Liberation Army The First Medical CenterChinese People's Liberation Army General HospitalBeijing 100853China Department of General Surgery The First Medical CenterChinese People's Liberation Army General HospitalBeijing 100853China

BACKGROUND The current prognostic significance of perigastric tumor deposits(TDs)in gastric cancer(GC)remains *** To assess the prognostic value of perigastric TDs and put forward a new TNM staging framework involving TDs for primary *** This study retrospectively analyzed the pathological data of 6672 patients with GC who underwent gastrectomy or surgery for GC with other diseases from January 1,2012 to December 31,2017 at the Chinese PLA General *** to the presence of perigastric TDs or not,the patients were divided into TD-positive and TD-negative groups by using the method of propensity score *** differences between TD-positive and TD-negative patients were analyzed using binary logistic regression *** Kaplan-Meier method was used to plot survival *** Cox regression modeling and the log-rank test were used to analyze the *** Perigastric TDs were found to be positive in 339(5.09%)of the 6672 patients with GC,among whom 237 were men(69.91%)and 102 were women(30.09%)(2.32:1).The median age was 59 years(range,27 to 78 years).Univariate and multivariate survival analyses indicated that TD-positive GC patients had a poorer prognosis than TD-negative patients(P<0.05).The 1-,3-,and 5-year overall survival rates of GC patients with TDs were 68.3%,19.6%,and 11.2%,respectively,and these were significantly poorer than those without TDs of the same *** was significant variation in survival according to TD locations among the GC patients(P<0.05).A new TNM staging framework for GC was formulated according to TD *** TDs appear in the gastric body,the original stages T1,T2,and T3 are classified as T4a with the new framework,and the original stages T4a and T4b both are classified as *** TDs appear in the lesser curvature,the previous stages N0,N1,N2,and N3 now both are classified as *** TDs appear in the greater curvature or the distant tissue,the patient should be categorized as

关键词： Tumor deposits Gastric cancer Prognosis Stage Overall survival