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Finite p-Groups with a Class of Complemented Normal Subgroups

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Acta Mathematica Sinica,English Series 2017年第2期33卷 278-286页

作者： li fang wang Qin Hai ZHANG Mathematics Department Shanxi Normal University Linfen 041004 P. R. China

Assume G is a finite group and H a subgroup of G. If there exists a subgroup K of G such that G = HK and H ∩ K = 1, then K is said to be a complement to H in G. A finite p-group G is called an NC-group if all its proper normal subgroups not contained in de（G） have complements. In this paper, some properties of NC-groups are investigated and some classes of NC-groups are classified. Keywords Finite p-groups, normal subgroups, subgroup complement

关键词： Finite p-groups normal subgroups subgroup complement

Impulse pressuring diffusion bonding of titanium to 304 stainless steel using pure Ni interlayer

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Rare Metals 2016年第4期35卷 331-336页

作者： fang-li wang Guang-Min Sheng Yong-Qiang Deng College of Materials Science and Engineering Chongqing University

In the present study, impulse pressuring diffu- sion bonding technology （IPDB） was utilized between commercially pure titanium and 304 stainless steel （SS） using pure nickel （Ni） as interlayer metal. The interfacial microstructures of the bonded joints were investigated by scanning electron microscopy （SEM） and energy dispersive spectroscope （EDS） analyses. It is found that with the aid of the Ni interlayer, the interdiffusion and reaction between Ti and SS can be effectively restricted and robust joints can be obtained. Intermetallic compounds （IMCs） including Ti2Ni, TiNi, and TiNi3 are detected at the Ti/Ni interface; however, only Ni-Fe solid solution is found at the Ni/SS interface. The maximum tensile strength of 358 MPa is obtained by IPDB for 90 s and the fracture takes place along the Ti2Ni and TiNi phase upon tensile loading. The existence of cleavage pattern on the fracture surface indi- cates the brittle nature of the joints.

关键词： Impulse pressuring diffusion bonding Titanium Stainless steel Ni interlayer

The influence of He-Ne laser on scar formation after trabeculectomy in rabbits

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International Journal of Ophthalmology(English edition) 2010年第2期3卷 132-136页

作者： Jun Hu, li-fang wang Department of Ophthalmology Tongji Hospital Affiliated to Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430030 Hubei Province China

AIMTo investigate the influence of He-Ne lasers on scar formation in the filtration canal after trabeculectomy in a rabbit model, as well as to explore the mechanisms for preventing scar formation when using He-Ne las... 详细信息

关键词： He-Ne laser trabeculectomy scar formation

NUMERICAL PREDICTION OF BLADE FREQUENCY NOISE OF CAVITATING PROPELLER

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维普期刊数据库

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Journal of Hydrodynamics 2012年第3期24卷 371-377页

作者： YE Jin-ming XIONG Ying li fang wang Zhan-zhi College of Naval Architecture and Power Naval University of Engineering Wuhan 430033 China

The blade frequency noise of a cavitating propeller in a uniform flow is analyzed in the time domain. The unsteady loading （of a dipole source） and the sheet cavity volume （of a monopole source） on the propeller surface are calculated by a potential-based surface panel method. Then the time-dependent pressure and the cavity volume data are used as the input for the Fowcs Williams-Hawkings formulation to predict the acoustics pressure. The integration of the noise source is performed over the true blade surface rather than the ideal blade surface without thickness. The noise characteristics of the cavitating propeller are discussed. With the sheet cavitation, the thickness （cavitation） noise is larger than the loading noise and is the dominant noise source. The noise directivity is not as clear as that of the noise under a non-cavitation condition. The cavitation noise is attenuated more slowly than the non-cavitation noise.

关键词： propeller surface panel method cavitation noise time domain

Rehabilitation care for pain in elderly knee replacement patients

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World Journal of Clinical Cases 2024年第4期12卷 721-728页

作者： li liu Qiao-Zhen Guan li-fang wang Wuhan Fourth Hospital Wuhan 430033Hubei ProvinceChina Department of Orthopaedics Wuhan Third HospitalWuhan 430074Hubei ProvinceChina

BACKGROUND Total knee arthroplasty(TKA)is recognized as the most effective surgical intervention for relieving pain and improving joint mobility and deformity in patients with knee osteoarthritis and other synovial *** application of accelerated postoperative rehabilitation(enhanced recovery after surgery)has demonstrated its efficacy in improving patient outcomes,and early postoperative joint function exercise has become a key prognostic factor in knee *** unexpected appearance of limb pain and swelling hindered the patient’s tendency for early mobilization,leading in prolonged hospitalization,delayed functional recovery and negative psychological responses.A retrospective analysis was conducted on a cohort of 116 patients who under-went TKA at our hospital between July 2019 and July *** patients were divided into two groups:A control group(n=58)receiving programmatic nur-sing,and an observed group(n=58)receiving programmed nursing combined with a collaborative nursing model.A pain management team consisting of attending physicians,head nurses,and responsible nurses was *** measures included visual analogue scale(VAS)scores,activities of daily living(ADL)scale scores,and functional *** ADL scores of patients in both groups exhibited a continuous ***,there was no statistically significant difference in the ADL scores between the two groups at 48 h and the 7th d post-surgery(P>0.05).Upon reexamination at the 3rd mo,the observation group demonstrated higher ADL scores compared to the control group(67.48±14.69 vs 59.40±16.06,P0.05).The functional status of patients in both groups exhibited a gradual increase prior to intervention and at the 1st,2nd,and 3rd month following discharge(P<0.05).There was no statistically significant difference in knee joint function scores b

关键词： Programmed pain nursing Collaborative nursing Total knee arthroplasty

Protecting User Privacy in a Multi-Path Information-Centric Network Using Multiple Random-Caches

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Journal of Computer Science & Technology 2017年第3期32卷 585-598页

作者： Wei-Bo Chu li-fang wang Ze-Jun Jiang Chin-Chen Chang School of Computer Science and Technology Northwestern Polytechnical University Xi'an 710072 China Department of Information Engineering and Computer Science Feng Chia University Taichung Taiwan 40724 China

In-network caching is a fundamental mechanism advocated by information-centric networks （ICNs） for efficient content delivery. However, this new mechanism also brings serious privacy risks due to cache snooping attacks. One effective solution to this problem is random-cache, where the cache in a router randomly mimics a cache hit or a cache miss for each content request/probe. In this paper, we investigate the effectiveness of using multiple random-caches to protect cache privacy in a multi-path ICN. We propose models for characterizing the privacy of multi-path ICNs with random-caches, and analyze two different attack scenarios： 1） prefix-based attacks and 2） suffix-based attacks. Both homogeneous and heterogeneous caches are considered. Our analysis shows that in a multi-path ICN an adversary can potentially gain more privacy information by adopting prefix-based attacks. Furthermore, heterogeneous caches provide much better privacy protection than homogeneous ones under both attacks. The effect of different parameters on the privacy of multi-path random-caches is further investigated, and the comparison with its single-path counterpart is carried out based on numerical evaluations. The analysis and results in this paper provide insights in designing and evaluating multi-path ICNs when we take privacy into consideration.

关键词： information-centric network (ICN) user privacy cache snooping random-cache multi-path

Load Balance Strategy of Data Routing Algorithm Using Semantics for Deduplication Clusters

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Journal of Electronic Science and Technology 2017年第3期15卷 277-282页

作者： Ze-Jun Jiang Zhi-Ke Zhang li-fang wang Chin-Chen Chang li liu School of Computer Science Northwestern Polytechnical University Xi'an 710072 IBM China Systems &Technology Lab Beijing 100193 Department of Information Engineering and Computer Science Feng Chia University Taichung 40724

The backup requirement of data centres is tremendous as the size of data created by human is massive and is increasing *** node deduplication cannot meet the increasing backup requirement of data centres.A feasible way is the deduplication cluster,which can meet it by adding storage *** data routing strategy is the key of the deduplication ***（data routing strategy using semantics） improves the storage utilization of MCS（minimum chunk signature） data routing strategy a ***,for the large deduplication cluster,the load balance of DRSS is worse than *** improve the load balance of DRSS,we propose a load balance strategy used for DRSS,namely *** a node is overloaded,DRSSLB iteratively migrates the current smallest container of the node to the smallest node in the deduplication cluster until this overloaded node becomes non-overloaded.A container is the minimum unit of data *** files sharing the same features or file names are stored in the same *** ensures the similar data groups are still in the same node after rebalancing the *** use the dataset from the real world to evaluate *** results show that,for various numbers of nodes of the deduplication cluster,the data skews of DRSSLB are under predefined value while the storage utilizations of DRSSLB do not nearly increase compared with DRSS,with the low penalty（the data migration rate is only6.5% when the number of nodes is 64）.

关键词： Index Terms--Data routing strategy deduplicationcluster semantics load balance.

A New Text Location Approach Based Wavelet

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计算机科学 2002年第z1期29卷 105-106,114页

作者： Weihua li Zhen fang Shuozhong wang 上海交通大学通信与信息工程学院上海200072 上海交通大学通信与信息工程学院上海200072 上海交通大学通信与信息工程学院上海200072

With the advancement of content-based retrieval technology, the importance of semantics for text information contained in images attracts many researchers. An algorithm which will automatically locate the textual regions in the input image will facilitate the retrieving task, and the optical character recognizer can then be applied to only those regions of the image which contain text. In this paper a new text location method based wavelet is described, which can be used to locate textual regions from complex image and video frame. Experimental results show that the textual regions in image can be located effectively and quickly.

关键词： Text location, 2-D wavelet, Morphological operation

Transgene directionally integrated into C-genome of Brassica napus

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Chinese Science Bulletin 2006年第13期51卷 1578-1585页

作者： li Jun fang Xiaoping wang Zhuan LUO lixia HU Qiong Key Laboratory of Oil Crops Genetic Improvement of the Ministry of Agriculture Institute of Oil Crops Research Chinese Academy of Agricultural Sciences Wuhan 430062 China

Integration of a transgene into a C-genome chromosome plays an important role in reducing ecological risk of transgenic Brassica napus To obtain C-genome transgenic B. napus, herbi- cide-resistant bar gene was firstly transferred into B. oleracea var. alboglabra mediated by Agrobacterium tumefaciens strain LBA4404. Then using the trans- genic B. oleracea as paternal plants and 8 non- transgenic varieties of B. rapa as maternal plants, C- genome transgenic B. napus with bar gene was arti- ficially resynthesized by means of ovary culture and chromosome doubling. Among 67 lines of the resyn- thesized B. napus, 31 were positive, and 36 were negative according to PCR test for bar gene. At least 2 plants from each line were kept for PPT spray con- firmation. The result was in consistence with the PCR test. Genomic Southern blotting of three randomly chosen lines also showed that bar gene had been integrated into the genome of resynthesized B. napus lines.

关键词： C-染色体组 Bar基因定向转基因芸苔再合成