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Experimental investigation of combustion mechanisms of kerosene-fueled scramjet engines with double-cavity flameholders

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Acta Mechanica Sinica 2011年第6期27卷 891-897页

作者： Yu Pan Jian-Guo Tan Jian-Han liang wei-dong Liu Zhen-Guo Wang Department of Aerospace and Material National University of Defense and Technology 410073 Changsha China

A scramjet combustor with double cavitybased flameholders was experimentally studied in a directconnected test bed with the inflow conditions of M = 2.64,Pt = 1.84 MPa,Tt = 1 300 *** ignition and selfsustained combustion with room temperature kerosene was achieved using pilot hydrogen,and kerosene was vertically injected into the combustor through 4×φ 0.5 mm holes mounted on the *** different equivalence ratios and different injection schemes with both tandem cavities and parallel cavities,flow fields were obtained and compared using a high speed camera and a Schlieren *** revealed that the combustor inside the flow field was greatly influenced by the cavity installation scheme,cavities in tandem easily to form a single side flame distribution,and cavities in parallel are more likely to form a joint flame,forming a choked combustion *** supersonic combustion flame was a kind of diffusion flame and there were two kinds of combustion *** the unchoked combustion mode,both subsonic and supersonic combustion regions *** in the choked mode,the combustion region was fully subsonic with strong shock propagating *** also showed that there was a balance point between the boundary separation and shock enhanced combustion,depending on the intensity of heat release.

关键词： Scramjet. Supersonic combustion. Flame structure Cavity flameholder

Wireless Autonomous Soft Crawlers for Adjustable Climbing Actuation

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Chinese Journal of Polymer Science 2023年第3期41卷 405-413,I0008页

作者： Lei Tian Ji-Ji Tan wei-liang dong Bo Yang Cui-Hua Li Dai Wang Hai-Yu Huang Xin-Tong Li Cai-Zhen Zhu Jian Xu Institute of Low-Dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China

Artificial soft actuators,featured with non-equilibrium internal circumstance and fast,programmable shape transformations,have attracted strong research interest recently due to their flexibility,highly controllable,and ***,wireless soft actuators,achieving the locomotion on different large slopes with multiple energy conversion,have been rarely ***,we create a asymmetric bilayer strategy to construct autonomous soft crawler via“breathing”moisture to motivate the mechanical *** soft crawlers present conspicuous performances including periodic tumbler locomotion predicted via improved Timoshenko’s equation,multiple reversible shape-morphing(circle,helix,despiralization,etc.)determined by their fiber orientation,controlled drive mode(front drive and rear drive)and rapid climb speed(4.76 cm/min)at wide slope *** architecture design,they can be series-wound or shunt-wound to construct multijoint complex *** climbing,a intelligent soft ring-pull with admirable cycle performance for preventing overheating or something untouchable,has been *** soft crawlers also realize multiple energy conversion to be actuated by light *** envision that this soft crawler system has an enormous potential in intelligent machine,microscopic diagnosis and treatment,biosensing,energy harvesting and conversion.

关键词： Soft crawler Tumbler locomotion Reversible shape-morphing Autonomous Energy conversion

Modulational instability of a resonantly polariton condensate in discrete lattices

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Chinese Physics B 2023年第3期32卷 143-146页

作者：漆伟郭晓刚董亮伟张晓斐 Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China

We study modulational instability of a resonantly polariton condensate in a discrete *** a discrete gain-saturation model,we derive the dispersion relation for the modulational instability by means of the linear-stability *** of the pumping strength,the nonlinearity,the strength of the detuning,and the coupling strength on the modulation instability are *** is found that the interplay between these parameters will dramatically change the modulational instability *** believe that the predicted results in this work can be useful for future possible experiment of exciton-polariton condensate in lattices.

关键词： modulational instability polariton condensate discrete lattices

Clinical analysis of patients with iatrogenic bile duct injury

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Hepatobiliary & Pancreatic Diseases International 2006年第2期5卷 283-285页

作者： wei-liang Yang, dong-wei Zhang and Xin-Chen Zhang Department of General Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China Department of General Surgery Second Affiliated Hospital Harbin Medical University Harbin 150086 China. wlyang_2008@***

BACKGROUND: The main cause of iatrogenic bile duct injury is misidentification of the common bile duct as the cystic duct. In this article, we summarize the experience in the treatment of 112 patients with iatrogenic bile duct injury. METHOD: Clinical data of these patients treated at 10 hospitals of Songhua river area, Heilongjiang province, China from January 1978 to January 2005 were analyzed retrospectively. RESULTS: In 55.4% patients (62/112), iatrogenic bile duct injury was due to misidentification of the anatomy of Calot's triangle before cholecystectomy. Their diagnosis was based on clinical features, celiac puncture and imaging examination in which ultrasonography was most sensitive, giving a diagnostic rate of 97. 5%. Six types of injury were identified according to their locations, and type Ⅲ damage was commonly seen ( 92/112 ). The curative rate in this group was 95.5% (107/112). Eighty-seven patients (77.7%) underwent Roux-en-Y choledochojejunostomy with a cure rate of 94.3% (82/87). CONCLUSION: The prevention of iatrogenic bile duct injury lies in identifying the topography of extrahepatic bile ducts. Roux-en-Y choledochojejunostomy is usually the treatment of choice.

关键词： wounds, injury biliary tract diseases surgical procedures operative

Surgical management for carcinoma of the gallbladder： a single-institution experience in 25 years

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Chinese Medical Journal 2008年第19期121卷 1900-1905页

作者： liang Jian-wei dong Shu-xiao ZHOU Zhi-xiang TIAN Yan-tao ZHAO dong-bing WANG Cheng-feng ZHAO Ping Department of Abdominal Surgical Oncology Cancer Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100021 China

Background Gallbladder carcinoma is rare and associated with dismal outcomes. Radical surgery is the only curative treatment, and options for adjuvant therapy remain limited. This study aimed to determine the factors influencing outcome of treatment in patients with gallbladder carcinoma, and to identify the patients who might benefit from radical surgery and adjuvant therapy. Methods Medical records and follow-up histories of 150 patients with gallbladder carcinoma who had undergone surgery between April 1980 and December 2005 were retrospectively reviewed. The factors predictive for the survival of the patients were identified using multivariate analysis. Results Surgery for gallbladder cancer was associated with an overall 5-year survival rate of 26.2%. After curative resection （40% of the patients）, the 5-year survival rate was 60.3%. The patients who underwent R0 resection had a significantly longer median survival （97.3 months） than those who had R1/R2 resection （8.3 months） or only laparotomy （3.7 months）（P 〈0.0001）. Univariate analysis showed that resectability, American Joint Committee on Cancer staging, tumor grade, adjuvant therapy, jaundice at presentation, depth of tumor invasion, lymph node involvement, distant metastasis, and carcinoembryonic antigen level were statistically significant predictors for survival. Multivariate analysis revealed American Joint Committee on Cancer staging and resectability were independent prognostic factors for survival. The patients who underwent noncurative resection might benefit from adjuvant therapy （median survival, 12.4 months vs 7.2 months, P=-0.006）. Conclusions Favorable survival rate can be achieved after curative resection, even for selected patients with advanced disease. Adjuvant therapy may improve the survival of patients with gallbladder carcinoma.

关键词： gallbladder carcinoma radical resection prognostic factor adjuvant therapy

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清代汉族移民与鄂尔多斯行政体制重构

首都师范大学学报（社会科学版） 2011年第1期 9-15页

作者：梁卫东首都师范大学历史学院河北体育学院

清代自康熙中叶后,内地人民开垦蒙地的禁令松弛,在鄂尔多斯逐渐形成了一个汉族移民群体。为解决汉族移民管辖问题,鄂尔多斯的行政体制发生调整与重构。这种调整与重构分为两个层面,即蒙旗在其内部设置相关组织、人员,国家设置相关职官... 详细信息

清代自康熙中叶后,内地人民开垦蒙地的禁令松弛,在鄂尔多斯逐渐形成了一个汉族移民群体。为解决汉族移民管辖问题,鄂尔多斯的行政体制发生调整与重构。这种调整与重构分为两个层面,即蒙旗在其内部设置相关组织、人员,国家设置相关职官。汉族移民与鄂尔多斯蒙旗的融合,以及鄂尔多斯行政体制的重构,都体现了历史发展的大趋势,但由于"阶级"和"时代"的局限,也存在着各种矛盾与问题。

关键词：清代鄂尔多斯汉族移民行政体制重构

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan Junling Lü Chunchi Zhang dong liang Lei Yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

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民国时期鄂尔多斯蒙旗现代教育述略

民族教育研究 2011年第3期22卷 51-58页

作者：梁卫东首都师范大学历史学院北京100048

民国时期,鄂尔多斯蒙旗现代教育经历了蒙旗地方政府倡导和中央政府倡导两个阶段。在蒙旗地方政府和中央政府的共同努力下,民国时期鄂尔多斯现代教育的规模迅速扩大,公立学校成为其现代教育的主体,同时教学内容也实现了现代化。但是由于... 详细信息

民国时期,鄂尔多斯蒙旗现代教育经历了蒙旗地方政府倡导和中央政府倡导两个阶段。在蒙旗地方政府和中央政府的共同努力下,民国时期鄂尔多斯现代教育的规模迅速扩大,公立学校成为其现代教育的主体,同时教学内容也实现了现代化。但是由于起点低、基础薄弱以及内涵建设不足等,从而使鄂尔多斯蒙旗现代教育在其发展过程中具有不可避免的局限性。

关键词：民国时期鄂尔多斯现代教育

Topological properties of tetratomic Su-Schrieffer-Heeger chains with hierarchical long-range hopping

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Chinese Physics B 2023年第7期32卷 469-476页

作者：李冠强王博涵唐劲羽彭娉董亮伟 Department of Physics and Institute of Theoretical Physics Shaanxi University of Science and TechnologyXi’an 710021China

We propose a new generalized Su–Schrieffer–Heeger model with hierarchical long-range hopping based on a onedimensional tetratomic chain. The properties of the topological states and phase transition, which depend on the cointeraction of the intracell and intercell hoppings, are investigated using the phase diagram of the winding number. It is shown that topological states with large positive/negative winding numbers can readily be generated in this system. The properties of the topological states can be verified by the ring-type structures in the trajectory diagram of the complex plane. The topological phase transition is strongly related to the opening(closure) of an energy bandgap at the center(boundaries) of the Brillouin zone. Finally, the non-zero-energy edge states at the ends of the finite system are revealed and matched with the bulk–boundary correspondence.

关键词： generalized Su-Schrieffer-Heeger model tight-binding approximation topological phase transition long-range hopping winding number edge state