检索结果-南通市图书馆

Three-dimensional modeling in complex liver surgery and liver transplantation

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2022年第4期21卷 318-324页

作者： jian-peng liu Jan Lerut Zhe Yang Ze-Kuan Li Shu-Sen Zheng Department of Hepatobiliary and Pancreatic Surgery Department of Liver TransplantationShulan(Hangzhou)HospitalZhejiang Shuren University School of MedicineHangzhou 310000China Starzl Unit of Abdominal Transplantation University Hospitals Saint LucUniversitécatholique LouvainBrusselsBelgium Division of Hepatobiliary Pancreatic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China National Clinical Research Center of Infectious Diseases Hangzhou 310003China

Liver resection and transplantation are the most effective therapies for many hepatobiliary tumors and ***,these surgical procedures are challenging due to the anatomic complexity and many anatomical variations of the vascular and biliary ***-dimensional(3D)printing models can clearly locate and describe blood vessels,bile ducts and tumors,calculate both liver and residual liver volumes,and finally predict the functional status of the liver after resection *** 3D printing models may be particularly helpful in the preoperative evaluation and surgical planning of especially complex liver resection and transplantation,allowing to possibly increase resectability rates and reduce postoperative *** the continuous developments of imaging techniques,such models are expected to become widely applied in clinical practice.

关键词： 3D printing models Liver surgery Liver transplantation

Parameters of Isotope Shifts for 2s2p3,1P1→ 2s2 1S0 Transitions in Heavy Be-Like Ions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第11期36卷 14-17页

作者： Xiang Zhang jian-peng liu Ji-Guang Li Hong-Xin Zou College of Liberal Arts and Science National University of Defense TechnologyChangsha 410073 Institute of Applied Physics and Computational Mathematics Beijing 100088

The field shift and mass shift parameters of the 2s2p3,1P1→ 2s2 1S0 transitions in Be-like ions(70 ≤ Z≤ 92)are calculated using the multi-configuration Dirac–Hartree–Fock and the relativistic configuration interaction methods with the inclusion of the Breit interaction and the leading QED corrections. We find that the mass shift parameters of these two transitions do not change monotonously along the isoelectronic sequence in the high-Z range due to the relativistic nuclear recoil effects. A minimum value exists for the specific mass shift parameters around Z= 80, especially for the 2s2p3,1P1→ 2s2 1S0 transition. In addition, the field shifts and mass shifts of these two transitions are estimated using an empirical formula, and their contributions are compared along the isoelectronic sequence.

关键词： transition. transitions relativistic

Forbidden transition properties of fine-structure 2p^3 ~4S_(3/2)–2p^3 ~2D_(3/2,5/2) for nitrogen-like ions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第8期27卷 196-203页

作者： Xiao-Kang He jian-peng liu Xiang Zhang Yong Shen Hong-Xin Zou College of Liberal Arts and Sciences National University of Defense TechnologyChangsha 410073China

Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction cal- culations, E2 and M1 transition probabilities of 2p3 4S3/2-2p3 2D3/2,5/2 are investigated in the nitrogen-like sequence with 7 〈 Z 〈 16. The contributions of the electron correlations, Breit interaction, and the quantum electrodynamic （QED） effects on the transition properties are analyzed. The present results can be used for diagnosing plasma. In addition, several N-like ions can also be recommended as a promising candidate for a highly charged ion （HCI） clock with a quality factor （Q） of trnnsition as hitch as 1020.

关键词： forbidden transition probabilities nitrogen-like ions MCDHF method RCI

Effects and mechanisms of electroacupuncture at PC6 on frequency of transient lower esophageal sphincter relaxation in cats

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第36期13卷 4873-4880页

作者： Chi Wang De-Feng Zhou Xiao-Wei Shuai jian-Xiang liu peng-Yan Xie Department of Gastroenterology First Hospital of Peking UniversityBeijing 100034China

AIM: To investigate the effects of electroacupuncture (EA) at neiguan (PC6) on gastric distention-induced transient lower esophageal sphincter relaxations (TLESRs) and discuss the mechanisms of this treatment. METHODS: ProtocolⅠ: Twelve healthy cats underwent gastric distention for 60 min on the first day. Electrical acupoint stimulation was applied at the neiguan or a sham point on the hip in randomized order before gastric distention, on the third day and fifth day. Those cats that underwent EA at neiguan on the fifth day were named "Neiguan Group" and the cats that underwent EA at a sham acupoint on the fifth day were named "Sham Group" (control group). During the experiment the frequency of TLESRs and lower esophageal sphincter (LES) pressure were observed by a perfused sleeve assembly. Plasma levels of gastrin (GAS) and motilin (MTL) were determined by radioimmunoassay. Nitrite/nitrate concentration in plasma and tissues were measured by Griess reagent. The nuclei in the brain stem were observed by immunohistochemistry method of c-Fos and NADPH-d dyeing. Protocol Ⅱ: Thirty six healthy cats were divided into 6 groups randomly. We gave saline (2 mL iv. control group), phaclofen (5 mg/kg iv. GABA-B antagonist), cholecystokinin octapeptide (CCK-8) (1 μg/kg per hour iv.), L-Arginine (200 mg/kg iv.), naloxone (2.5 μmol/kg iv.) and tacrine (5.6 mg/kg ip. cholinesterase inhibitor) respectively before EA at Neiguan and gastric distention. And the frequencies of TLESRs in experimental groups were compared with the control ***: ProtocolⅠ: Not only the frequency of gastric distention-induced TLESR in 60 min but also the rate of common cavity during TLESRs were significantlydecreased by EA at neiguan compared to that of sham acupoint stimulation. C-Fos immunoreactivity and NOS reactivity in the solitarius (NTS) and dorsal motor nucleus of the vagus (DMV) were significantly decreased by EA at neiguan compared to that of the sham group. However, the positive nuclei

关键词： Electroacupuncture Transient lower esophageal sphincter relaxation C-Fos Nitric oxide Cat

Effect of sharp vacuum-plasma boundary on the electron injection and acceleration in a few-cycle laser driven wakefield

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 Physics B 2023年第9期32卷 342-347页

作者：张国博刘松邹德滨崔野刘建鹏杨晓虎马燕云邵福球 Department of Nuclear Science and Technology National University of Defense TechnologyChangsha 410073China Department of Physics National University of Defense TechnologyChangsha 410073China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China

The electron injection and acceleration driven by a few-cycle laser with a sharp vacuum-plasma boundary have been investigated through three-dimensional(3D)particle-in-cell *** is found that an isotropic boundary impact injection(BII)first occurs at the vacuum-plasma boundary,and then carrier-envelope-phase(CEP)shift causes the transverse oscillation of the plasma bubble,resulting in a periodic electron self-injection(SI)in the laser polarization *** shows that the electron charge of the BII only accounts for a small part of the total charge,and the CEP can effectively tune the quality of the injected electron *** dependences of laser intensity and electron density on the total charge and the ratio of BII charge to the total charge are *** results are beneficial to electron acceleration and its applications,such as betatron radiation source.

关键词： laser wakefield acceleration few-cycle laser sharp vacuum-plasma boundary

二维桁架结构拓扑优化的特征线提取方法及算例分析

在线全文

学校读者我要写书评

暂无评论

机械科学与技术 2018年第5期37卷 675-682页

作者：程自然颜健彭佑多刘永祥彭黎湖南科技大学机械设备健康维护省重点实验室湖南湘潭411201

针对二维桁架结构拓扑优化结果面向工程制造的问题,提出了一种桁架拓扑优化结果的特征线(桁架杆件轴线)提取方法。基于渐进结构优化方法(ESO)对连续体结构进行拓扑优化,获得桁架结构的拓扑结构。根据桁架拓扑优化结果提取各拓扑区域的... 详细信息

针对二维桁架结构拓扑优化结果面向工程制造的问题,提出了一种桁架拓扑优化结果的特征线(桁架杆件轴线)提取方法。基于渐进结构优化方法(ESO)对连续体结构进行拓扑优化,获得桁架结构的拓扑结构。根据桁架拓扑优化结果提取各拓扑区域的中心点坐标,基于桁架杆件的直线特征对拓扑区域进行区域划分,而后建立各拓扑区域的特征线数学模型。结合各特征线数学模型确定桁架杆件的节点,并引入节点合并的半径区域,建立了桁架各杆件连接节点位置的二次优化数学模型。最终,根据最优的节点位置得到了面向制造的桁架拓扑优化结果-特征线。采用3个经典算例,验证了该桁架拓扑优化结果特征线提取方法的有效性,为后续桁架结构的杆件截面优化提供了基础。

关键词：桁架结构优化拓扑优化特征线提取方法面向制造渐进结构优化方法(ESO)

Multiple liver metastases of unknown origin:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2025年第1期17卷 233-238页

作者： Ying-Jin Wang Ze-Chuan liu jian Wang Yin-Mo Yang Department of Hepatobiliary Pancreatic Surgery Peking University First HospitalBeijing 100034China Department of Interventional and Vascular Surgery Peking University First HospitalBeijing 100034China

BACKGROUND The liver is the most common site of digestive system tumor metastasis,but not all liver metastases can be traced back to the primary *** it is unusual,syphilis can impact the liver,manifesting as syphilitic hepatitis with inflammatory nodules,which might be misdiagnosed as *** SUMMARY This case report involves a 46-year-old female who developed right upper abdominal pain and intermittent low fever that persisted for more than three *** definitive diagnosis of a tumor had been made in the past decades,but signs of multiple liver metastases were recognized after a computed tomo-graphy scan without evidence of primary *** positive serological tests for syphilis and a biopsy of the liver nodules,a diagnosis of hepatic syphilis was made and confirmed with follow-up nodule reduction after anti-syphilis *** Clinicians must be aware of the possibility that syphilis can cause hepatic inflam-matory masses,especially when liver metastasis is suspected without evidence of primary lesions.A definitive diagnosis should be established in conjunction with a review of the patient’s medical history for accurate therapeutic intervention.

关键词： Syphilitic hepatitis Liver nodules Liver metastasis Treponema pallidum Case report

Chemical markers' fishing and knockout for holistic activity and interactionevaluation of the components in herbal medicines

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

Chemical markers' fishing and knockout for holistic activity...

中华中医药学会中药分析分会第五届学术交流会

作者： Ying liu,jian-Liang Zhou,peng liu,Shi Sun,Ping Li Laboratory of Modern Chinese Medicines(China Pharmaceutical University) Ministry of Education,Nanjing 210009,China

A strategy based on chemical markers’ fishing and knockout has been proposed for holistic activity and interaction evaluation of the bioactive components in herbal medicines(HMs).It was devised to screen bioactive-compound group that represents the efficacy of HM,estimate the bioactivity contribution of each component and elucidate the interactions of *** strategy was accomplished through the following steps:(1) screen out the chemical markers(target peaks) in a HM fingerprint using online two-dimensional turbulent flow chromatography/liquid chromatography-mass spectrometry technique,(2) fish target peaks and knockout any interested peak,and(3) evaluate the bioactivities of fishing and knockout portions. After comparison of the bioactivities of samples containing different target peaks,the efficacy of target-peak group, bioactivity contribution of each compound,and the interactions of multi-components are *** Acetylcholinesterase(AChE) and Bulbs of Lycoris radiata(***.) Herb.(BLR) as the experimental materials, four target peaks were screened out as the AChE *** target peaks’ fishing and knockout,combined with activity evaluation,we observed that the bioactivity of the four-peak mixture is similar with the global bioactivity of BLR extract,and there are significant suppressive actions among these four target *** results indicate that this proposed strategy is a useful approach for holistic screening of bioactive-compound group and elucidation of the multi-component interactions in HM.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

离子通道与人类遗传病

现代生物医学进展 2006年第8期6卷 59-62,68页

作者：彭建柳广东教育学院生物系广东广州510303

细胞膜离子通道结构和功能正常是细胞进行生理活动的基础,对离子通道功能具有决定性意义的特定位点的突变导致其开放、关闭或激活、失活功能异常,引起组织机能紊乱,形成各种遗传性疾病。本文从水通道蛋白,钙通道,钠通道,钾通道等多种通... 详细信息

细胞膜离子通道结构和功能正常是细胞进行生理活动的基础,对离子通道功能具有决定性意义的特定位点的突变导致其开放、关闭或激活、失活功能异常,引起组织机能紊乱,形成各种遗传性疾病。本文从水通道蛋白,钙通道,钠通道,钾通道等多种通道蛋白引起的遗传病的现象以及机理做较深入的阐述。

关键词：离子通道遗传性疾病