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Ten cases of intradiaphragmatic extralobar pulmonary sequestration:a single-center experience

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World Journal of Pediatric Surgery 2022年第2期5卷 5-10页

作者： Yue Gao xu Han Jie jin zheng Tan Department of Paediatric Thoracic Surgery The Children's HospitalZhejang University School of MedicineNational Clinical Research Center for Child HealthNational Regional Medical Center for ChildrenHangzhouZhejiangChina Clinical laboratory The Children's HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthNational Regional Medical Center for ChildrenHangzhouZhejiangChina

Background Intradiaphragmatic extralobar pulmonary sequestration(IDEPS)is a rare type of pulmonary sequestration(PS).The purpose of this study is to assess diagnosis and operative treatment of *** Patients with PS who were diagnosed and treated in our center from January 2015 to December 2020 were analyzed retrospectively to identify patients with *** Totally,215 patients with PS were treated surgically,including 10 cases with *** ultrasounds and postnatal-enhanced CT showed the presence of IDEPS in four cases and in seven cases,*** three-dimensional(3D)reconstruction software was performed perfectly to identify the location of the lesions in 10 *** surgeries were performed smoothly by laparoscopic surgery in one case,video-assisted thoracic surgery(VATS)in five cases and Da Vinci robot-assisted thoracoscopic surgery(DVRATS)in four *** the VATS group,the average operative duration,intraoperative blood loss volume,length of stay after operation,and postoperative thoracic catheter indwelling duration were 48 min,3.8 mL,6.4 days and 2.2 days,*** of the DVRATS group were 80 min,3.5 mL,4.3 days and 1.5 days,*** side effects had *** The 3D reconstruction software was proven to be capable in assisting the assessment of *** suggested early surgery to treat IDEPS,and the best path was accessing the mass from the *** DVRATS and VATS for the treatment of an IDEPS are safe,feasible,and ***,DVRATS provides a 3D magnified view,more flexibility and precision.

关键词： operative diagnosis treatment

Physical-Layer Key Generation Based on Multipath Channel Diversity Using Dynamic Metasurface Antennas

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China Communications 2023年第4期20卷 153-166页

作者： zheng Wan Yangming Lou Xiaoming xu jinmei Yang Wenyu Jiang Kaizhi Huang Liang jin Information Engineering University Zhengzhou 450001China Purple Mountain Laboratories for Network and Communication Security Nanjing 210096China

Physical layer key generation(PKG)technology leverages the reciprocal channel randomness to generate the shared secret *** low secret key capacity of the existing PKG schemes is due to the reduction in degree-of-freedom from multipath fading channels to multipath combined *** improve the wireless key generation rate,we propose a multipath channel diversity-based PKG *** by dynamic metasurface antennas(DMA),a two-stage multipath channel parameter estimation algorithm is proposed to efficiently realize super-resolution multipath parameter *** proposed algorithm first estimates the angle of arrival(AOA)based on the reconfigurable radiation pattern of DMA,and then utilizes the results to design the training beamforming and receive beamforming to improve the estimation accuracy of the path *** multipath separation and parameter estimation,multi-dimensional independent path gains are utilized for generating secret ***,we analyze the security and complexity of the proposed scheme and give an upper bound on the secret key capacity in the high signal-to-noise ratio(SNR)*** simulation results demonstrate that the proposed scheme can greatly improve the secret key capacity compared with the existing schemes.

关键词： physical layer security multipath channel diversity physical layer key generation dynamic metasurface antennas

C-type natriuretic-peptide-potentiated relaxation response of gastric smooth muscle in streptozotocin-induced diabetic rats

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World Journal of Gastroenterology 2009年第17期15卷 2125-2131页

作者： Ying-Lan Cai Dong-Yuan xu Xiang-Lan Li Zhang-xun Qiu zheng jin Wen-Xie xu Department of Physiology Yanbian University School of Medicine Yanji 133000 Jilin Province China Department of Physiology Shanghai Jiaotong University School of Medicine Shanghai 200240 China

AIM: To study the sensitivity of gastric smooth muscle to C-type natriuretic peptide (CNP) in streptozotocin (STZ)-induced diabetic rats. METHODS: The spontaneous contraction of a gastric smooth muscle strip was recorded by using physiological methods in rats. The expressions of CNP and natriuretic peptide receptor-B (NPR-B) in gastric tissue were examined by using immunohistochemistry techniques in the diabetic rat. RESULTS: At 4 wk after injection of STZ and vehicle, the frequency of spontaneous contraction of gastric smooth muscle was significantly reduced in diabetic rats, and the frequency was decreased from 3.10 ± 0.14 cycle/min in controls to 2.23 ± 0.13 cycle/min (n = 8, P < 0.01). However, the amplitude of spontaneous contraction was not significant different from the normal rat. CNP significantly inhibited spontaneous contraction of gastric smooth muscle in normal and diabetic rats, but the inhibitory effect was significantly potentiated in the diabetic rats. The amplitudes of spontaneous contraction were suppressed by 75.15% ± 0.71% and 58.92% ± 1.32% while the frequencies were decreased by 53.33% ± 2.03% and 26.95% ± 2.82% in diabetic and normal rats, respectively (n = 8, P < 0.01). The expression of CNP in gastric tissue was not changed in diabetic rats, however the expression of NPR-B was significantly increased in diabetic rats, and the staining indexes of NPR-B were 30.67 ± 1.59 and 17.63 ± 1.49 in diabetic and normal rat, respectively (n = 8, P < 0.01).CONCLUSION: The results suggest that CNP induced an inhibitory effect on spontaneous contraction of gastric smooth muscle, potentiated in diabetic rat via up-regulation of the natriuretic peptides-NPR-B-particulate guanylyl cyclase-cyclic GMP signal pathway.

关键词： Diabetes Natriuretic peptide receptor type B Gastric smooth muscle Gastroparesis Spontaneous contraction

Neural Dynamics for Distributed Collaborative Control of Manipulators With Time Delays

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 854-863页

作者： Long jin Xin zheng Xin Luo School of Information Science and Engineering Lanzhou UniversityLanzhou 730000 IEEE State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an 710071China School of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqing 400065 Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

Time-delay phenomena extensively exist in practical systems,e.g.,multi-agent systems,bringing negative impacts on their *** work analyzes a collaborative control problem of redundant manipulators with time delays and proposes a time-delayed and distributed neural dynamics *** assumptions that the network topology is fixed and connected and the existing maximal time delay is no more than a threshold value,it is proved that all manipulators in the distributed network are able to reach a desired *** proposed distributed scheme with time delays considered is converted into a time-variant optimization problem,and a neural dynamics solver is designed to solve it ***,the proposed neural dynamics solver is proved to be stable,convergent and ***,the allowable threshold value of time delay that ensures the proposed scheme’s stability is *** examples and comparisons are provided to intuitively prove the validity of the proposed neural dynamics scheme and solver.

关键词： Distributed collaborative control neural dynamics redundancy resolution repetitive motion planning(RMP) time delay

A Bishop–Phelps–Bollobás Theorem for Asplund Operators

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Acta Mathematica Sinica,English Series 2020年第7期36卷 765-782页

作者： Li Xin CHENG Qing jin CHENG Kang Kang xu Wen ZHANG Zhe Ming zheng School of Mathematical Sciences Xiamen UniversityXiamen361005P.R.China

By characterizing Asplund operators through Fréchet differentiability property of convex functions,we show the following Bishop–Phelps–Bollobás theorem:Suppose that X is a Banach space,T:X→C(K)is an Asplund operator with║T║=1,and that x0∈SX,01-ε2/*** there exist xε∈SX and an Asplund operator S:X→C(K)of norm one so that║S(xε)║=1,x0-xε1-ε2/*** there exist yε*∈SY*,xε∈(±en),yε∈SY,and a strong Radon–Nikodym operator S:?1→Y of norm one so that(ⅰ)║S(xε)║=1;(ⅱ)S(xε)=yε;(ⅲ)║T-S║=1;(ⅴ)║y0*-yε*║<εand(ⅵ)║T*-S*║<ε,where(en)denotes the standard unit vector basis of?1.

关键词： Fréchet operator satisfy

Hydrocarbon generation from Carboniferous-Permian coaly source rocks in the Huanghua depression under different geological processes

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Petroleum Science 2020年第6期17卷 1540-1555页

作者： jin-Jun xu Qiang jin Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580ShandongChina Pilot National Laboratory for Marine Science and Technology China University of Petroleum(East China)Aoshanwei Wenhai Road 1Qingdao 266237ShandongChina

Natural gas and condensate derived from Carboniferous-Permian(C-P)coaly source rocks discovered in the Dagang Oilfield in the Bohai Bay Basin(east China)have important implications for the potential exploration of C-P coaly source *** study analyzed the secondary,tertiary,and dynamic characteristics of hydrocarbon generation in order to predict the hydrocarbon potentials of different exploration areas in the Dagang *** results indicated that C-P oil and gas were generated from coaly source rocks by secondary or tertiary hydrocarbon generation and characterized by notably different hydrocarbon products and generation *** hydrocarbon generation was completed when the maturity reached vitrinite reflectance(Ro)of 0.7%-0.9%before uplift prior to the *** hydrocarbon generation from the source rocks was limited in deep buried sags in the Oligocene,where the products consisted of light oil and *** activation energies for secondary and tertiary hydrocarbon generation were 260-280 kJ/mol and 300-330 kJ/mol,respectively,indicating that each instance of hydrocarbon generation required higher temperature or deeper burial than the previous *** with secondary or tertiary hydrocarbon generation from C-P coaly source rocks were interpreted as potential oil and gas exploration regions.

关键词： Hydrocarbon generation Thermal simulation Coaly source rocks Carboniferous-Permian Huanghua depression

Establishing an Assessment Index System for Sewage Treatment Works in China

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Engineering 2023年第8期27卷 18-22页

作者： Zuxin xu jin xu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

*** The urban sewage treatment system,including sewage pipe networks and sewage treatment plants,is an important infrastructure to ensure urban social and economic *** the past few decades,due to the unremitting efforts of the Chinese government,the construction of China’s urban sewage treatment infrastructure has developed rapidly[1].

关键词： treatment Sewage sewage

Convex Reformulation for Two-sided Distributionally Robust Chance Constraints with Inexact Moment Information

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 1060-1065页

作者： Lun Yang Yinliang xu zheng xu Hongbin Sun TsinghuaBerkeley Shenzhen Institute Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Electrical Engineering State Key Laboratory of Power SystemsTsinghua UniversityBeijing 100084China

Constraints on each node and line in power systems generally have upper and lower bounds,denoted as twosided *** existing power system optimization methods with the distributionally robust(DR)chance-constrained program treat the two-sided DR chance constraint separately,which is an inexact *** letter derives an equivalent reformulation for the generic two-sided DR chance constraint under the interval moment based ambiguity set,which does not require the exact moment *** derived reformulation is a second-order cone program(SOCP)formulation and is then applied to the optimal power flow(OPF)problem under *** results on several IEEE systems demonstrate the effectiveness of the proposed SOCP formulation and show the differences with other DR chance-constrained OPF approaches.

关键词： Two-sided chance constraint distributionally robust conic reformulation interval moment optimal power flow

Underactuated spacecraft angular velocity stabilization and three-axis attitude stabilization using two single gimbal control moment gyros

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Acta Mechanica Sinica 2010年第2期26卷 279-288页

作者： Lei jin Shijie xu Department of Guidance Navigation and Control School of Astronautics Beihang University 100191 Beijing China

Angular velocity stabilization control and attitude stabilization control for an underactuated spacecraft using only two single gimbal control moment gyros （SGCMGs） as actuators is investigated. First of all, the dynamic model of the underactuated spacecraft is established and the singularity of different configurations with the two SGCMGs is analyzed. Under the assumption that the gimbal axes of the two SGCMGs are installed in any direction, and that the total system angular momentum is not zero, a state feedback control law via Lyapunov method is designed to globally asymptotically stabilize the angular velocity of spacecraft. Under the assumption that the gimbal axes of the two SGCMGs are coaxially installed along anyone of the three principal axes of spacecraft inertia, and that the total system angular momentum is zero, a discontinuous state feedback control law is designed to stabilize three-axis attitude of spacecraft with respect to the inertial frame. Furthermore, the singularity escape of SGCMGs for the above two control problems is also studied. Simulation results demonstrate the validity of the control laws.

关键词： Single gimbal control moment gyro ·Undcractuated spacecraft · Angular velocity stabilization · Three-axis attitude stabilization·Singularity