The Efficacy Analysis of Endoscopic Third Ventriculostomy in Infantile Hydrocephalus

He, Zhenhua,An, Caixia,Zhang, Xinding,He, Xiaodong,Li, Qiang The Korean Neurosurgical Society 2015 Journal of Korean neurosurgical society Vol.57 No.2

Objective : To investigate the efficacy of endoscopic third ventriculostomy (ETV) for infantile hydrocephalus. Methods : Retrospectively reviewed the 17 infantile hydrocephalus cases who were treated with ETV between July 2009 and June 2013. The study includes 17 patients (4 Han and 13 Hui) between the ages of 51 and 337 days. Five cases with encephalitis history and 2 cases with cerebral hemorrhage, with the remaining 10 cases congenital hydrocephalus. ETVs were performed for all patients with 1 case failing because the severe ventricle inflammatory adhesion, excessive exudation, and vague basilar artery. Results : Among the 16 successful cases 7 cases improved remarkably : heads and ventricles reduced and cerebral cortexes thickening morphologically. The ventricles of the remaining cases were unchanged. Conclusion : The ethnic minority account for the majority of the patients in this study. ETV is effective for infantile obstructive hydrocephalus.

Thermostability of Monolithic and Reinforced Al-Fe-V-Si Materials

He, Yiqiang,Qiao, Bin,Wang, Na,Yang, Jianming,Xu, Zhengkun,Chen, Zhenhua,Chen, Zhigang The Korean Society for Composite Materials 2009 Advanced composite materials Vol.18 No.4

Al-Fe-V-Si alloys reinforced with SiC particles were prepared by multi-layer spray deposition technique. Both microstructures and mechanical properties including hardness and tensile properties development during hot exposure process of Al-8.5Fe-1.3V-1.7Si, Al-8.5Fe-1.3V-1.7Si/15 vol% $SiC_P$ and Al-10.0Fe-1.3V-2Si/15 vol% $SiC_P$ were investigated. The experimental results showed that an amorphous interface of about 3 nm in thickness formed between SiC particles and the matrix. SiC particles injected silicon into the matrix; thus an elevated silicon concentration was found around $\alpha-Al_{12}(Fe,\;V)_3Si$ dispersoids, which subsequently inhibited the coarsening and decomposition of $\alpha-Al_{12}(Fe,\;V)_3Si$ dispersoids and enhanced the thermostability of the alloy matrix. Moreover, the thermostability of microstructure and mechanical properties of Al-10.0Fe-1.3V-2Si/15 vol% $SiC_P$ are of higher quality than those of Al-8.5Fe-1.3V-1.7Si/15 vol% $SiC_P$.

Effect of Anhydride Grafting Agent on Trap Levels of Low-Density Polyethylene

Lijuan He,Zhenhua Yuan,Xiong Yang,Huiqing Niu,Chao Zhu,Dawei Li,Lei Zhao,Chuntian Chen 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.5

Trap distribution of the low-density polyethylene(LDPE) modified by anhydride grafting agent was studied and the effect of grafting agent on the trap levels was analyzed by the method of Photo-stimulated Discharge in this paper. Different concentrations and types of same concentration of LDPE modified by anhydride grafting agent were measured by using continuous UV scanning. The results showed that different concentrations and types of grafting agent had effect on trap levels distribution of LDPE. The trap depth would decrease with the anhydride grafting agent content increasing and increase with its damaged condition increasing when anhydride grafting agent was destroyed. Anhydride grafting agent are widely applied to the production and research of high pressure insulating polyethylene materials. The purpose of this paper is to elaborate the effect of anhydride grafting agent on the insulating properties of polyethylene material and explain the strongest binding capacity of anhydride grafting agent to space charge.

Strategy for Task Offloading of Multi-user and Multi-server Based on Cost Optimization in Mobile Edge Computing Environment

( Yanfei He ),( Zhenhua Tang ) 한국정보처리학회 2021 Journal of information processing systems Vol.17 No.3

With the development of mobile edge computing, how to utilize the computing power of edge computing to effectively and efficiently offload data and to compute offloading is of great research value. This paper studies the computation offloading problem of multi-user and multi-server in mobile edge computing. Firstly, in order to minimize system energy consumption, the problem is modeled by considering the joint optimization of the offloading strategy and the wireless and computing resource allocation in a multi-user and multi-server scenario. Additionally, this paper explores the computation offloading scheme to optimize the overall cost. As the centralized optimization method is an NP problem, the game method is used to achieve effective computation offloading in a distributed manner. The decision problem of distributed computation offloading between the mobile equipment is modeled as a multi-user computation offloading game. There is a Nash equilibrium in this game, and it can be achieved by a limited number of iterations. Then, we propose a distributed computation offloading algorithm, which first calculates offloading weights, and then distributedly iterates by the time slot to update the computation offloading decision. Finally, the algorithm is verified by simulation experiments. Simulation results show that our proposed algorithm can achieve the balance by a limited number of iterations. At the same time, the algorithm outperforms several other advanced computation offloading algorithms in terms of the number of users and overall overheads for beneficial decision-making.

magnetostratigraphy, 26Al-10Be, Yx02 borehole, tectonic evolution, Daxing Uplift, Beijing Sub-plain

Fubing He,Xiwei Xu,Fang Tian,Zhenhua Liu,Yueze Zhang,Lingyan Bai,Yubin Cui,Kai Wang,Wenzhi Niu,Jingbo Ni,Xiaoyong Liu,Mengmeng Cao 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.2

The buried Daxing Uplift connects the Beijing Sag and Dachang Sag, which is the critical tectonic unit for understanding the structural evolution of the Beijing Sub-plain and its linkages to regional tectonics. This study combines paleomagnetic, 26Al-10Be isochron dates and sedimentary analyses from a new borehole (Yx02) in the northeastern Beijing Sub-plain to shed fresh light on regional tectonic processes and the sedimentary history since the Pliocene. The main findings are as follows: (1) the Daxing Uplift had formed three depositional episodes: alluvial-fan, lacustrine-delta, and alluvial-fan sedimentation since the Cenozoic; (2) The borehole records the Brunhes, Gauss normal chron, and the Matuyama, Gilbert reversed chron in the Daxing Uplift, the corresponding depths are 0–148.9 m, 148.9–315.0 m, 315.0–520.5 m and 520.5–650 m; (3) An important tectonic event started in ~4.3 Ma, disintegrated NE-trending basin and range terrain, reactivated the NW-trending Nankou-Sunhe fault, and formed Shunyi fault in Beijing Sub-plain. Sedimentation occurs exclusively in the Beijing Sag and the northeastern Daxing Uplift during ~4.3–1.77 Ma; (4) During ~1.77–1.07 Ma, a transition from an extension to a strike-slip occurred, and is described not only in a progressively higher increase of the overall deposition rate, but also in a decrease of the relative deposition disparity between sags and uplifts. Since then, the Beijing Sub-plain has been shaped, associated with an overall subsidence depression in the Bohai Bay Basin. This work enhances our understanding of the formation and evolution of the Beijing Sub-plain, the division of tectonic episodes, and the initiation time of the latest tectonic movement in the break-up region, North China Craton, since the Neogene.

Observer-based Controller Design for A T-S Fuzzy System with Unknown Premise Variables

Wen-Bo Xie,He Li,Zhenhua Wang,Jian Zhang 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.4

For the stabilization problem of T-S fuzzy system, a new observer-based controller design approachis proposed when premise variables are not accessible. With a fuzzy observer, the estimated states error system isdescribed as two parts: unknown premise variable caused terms and observer error terms. Consider the property thatthe norm of the unknown premise variable caused terms are under a Lipschitz condition constraint of observer error,an observer and controller errors augmented system is obtained. Then based on the Lyapunov function method, aseries of linear matrix inequality conditions are proposed to asymptotically stabilize the system, the observer gainmatrices are used to overcome the uncertainties caused by UPVs. Finally a simulation example is used to illustratethe effectiveness of the proposed method, comparisons with traditional method shows the conservatism reductioneffects.

Cloning and Characterization of the Ammonium Transporter Genes BaAMT1;1 and BaAMT1;3 from Chinese Kale

Shiwei Song,Riyuan Chen,Zhenhua He,Xinmin Huang,Lihua Zhong,Houcheng Liu,Guangwen Sun 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.2

Chinese kale (Brassica alboglabra L.) is a popular vegetable rich in important nutrients. Fertilization withappropriate ammonium:nitrate ratios enhances biomass production and quality. AMT-type ammonium transporters havebeen shown to mediate ammonium uptake across the plasma membrane. However, very little is known about themolecular regulation of growth and development by ammonium in Chinese kale, including how ammonium regulatesthe expression of AMT1 genes. In this study, we identified and characterized two AMT1 genes from B. alboglabra,BaAMT1;1 and BaAMT1;3. The full-length open reading frames of BaAMT1;1 and BaAMT1;3 were 1512 bp and1515 bp, respectively. Transient expression of the fusion proteins pBE-EGFP-BaAMT1;1 and pBE-EGFP-BaAMT1;3 inonion epidermal cells indicated that these transporters are located on the plasma membrane. BaAMT1;1 and BaAMT1;3were functional in yeast and complemented a mutant defective in ammonium transport. BaAMT1;1 was expressed invegetative organs and at high levels in roots, while BaAMT1;3 expression was root specific. In addition, we observedopposite responses of BaAMT1;1 and BaAMT1;3 expression to nitrogen starvation and ammonium resupply in roots. These results provide new insights into the molecular mechanisms underlying ammonium absorption in Chinese kale.