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Melanin synthesis genes BgTH and BgDdc affect body color and cuticle permeability in Blattella germanica

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Insect Science 2022年第6期29卷 1552-1568页

作者： tian-tian bai Xiao-Jin Pei Tong-Xian Liu Yong-Liang Fan Shi-ze Zhang State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of lIntegrated Pest Management on Crops in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxiChina Present address:Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology School of Life SciencesSouth China Normal UniversityGuangzhou510631China

Melanin is involved in cuticle pigmentation and sclerotization of insects,which is critical for maintaining structural integrity and functional completeness of insect *** 2 key enzymes of tyrosine hydroxylase(TH)and dopa decarboxylase(DDC)predicted in melanin biosynthesis are usually conserved in ***,it is unclear whether their function is related to epidermal *** this study,we identified and cloned the gene sequences of BgTH and BgDdc from Blattella germanica,and revealed that they both showed a high expression at the molting,and BgTH was abundant in the head and integument while BgDdc was expressed highest in the fat *** RNA in-terference(RNAi),we found that knockdown of BgTH caused molting obstacles in some cockroaches,with the survivors showing pale color and softer integuments,while knock-down of BgDdc was viable and generated an abnormal light brown body *** assay showed that the dsBgTH-injected adults died earlier than control groups under a dry atmosphere,but dsBgDdc-injected cockroaches did *** contrast,when dsRNA-treated cockroaches were reared under a high humidity condition,almost no cockroaches died in all ***,with eosin Y staining assay,we found that BgTH-RNAi resulted in a higher cuticular permeability,and BgDdc-RNAi also caused slight dye *** results demonstrate that BgTH and BgDdc function in body pigmentation and affect the waterproofing ability of the cuticle,and the reduction of cuticular perme-ability may be achieved through cuticle melanization.

关键词： cuticular permeability desiccation tolerance dopa decarboxylase German cockroach pigmentation tyrosine hydroxylase

Small Solutions of Quadratic Equations with Prime Variables in Arithmetic Progressions

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Acta Mathematica Sinica,English Series 2009年第2期25卷 299-320页

作者： tian ze WANG School of Mathematics and Information Sciences He'nan University Kaifeng 475001 P. R. China School of Mathematics and Information Sciences North China University of Water Conservancy and Electric Power Zhengzhou 450011 P. R. China

A necessary and sufficient solvable condition for diagonal quadratic equation with prime variables in arithmetic progressions is given, and the best qualitative bound for small solutions of the equation is obtained,

关键词： quadratic equation prime variable small solution arithmetic progression

Response of runoff and its components to climate change in the Manas River of the tian Shan Mountains

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Advances in Climate Change Research 2024年第1期15卷 62-74页

作者： ze-Long YANG Peng bai Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 10010lChina University of Chinese Academy of Sciences Beijing 100049China

A warming-wetting climate trend has led to increased runoff in most watersheds in the tian Shan Mountains over the past few ***,it remains unclear how runoff components,that is,rainfall runoff(Rrain),snowmelt runoff(Rsnow),and glacier meltwater(Rglacier),responded to historical climate change and how they will evolve under future climate change ***,we used a modified Hydrologiska Byrans Vattenbalansavdelning(HBV)model and a detrending method to quantify the impact of precipitation and temperature changes on runoff components in the largest river(Manas River)on the northern slope of the tian Shan Mountains from 1982 to 2015.A multivariate calibration strategy,including snow cover,glacier area,and runoff was implemented to constrain model parameters associated with runoff *** downscaled outputs of 12 general circulation models(GCMs)from the Sixth Coupled Model Intercomparison Project(CMIP6)were also used to force the modified HBV model to project the response of runoff and its components to future(2016-2100)climate change under three common socio-economic pathways(SSP126,SSP245,and SSP585).The results indicate that Rrain dominates mean annual runoff with a proportion of 42%,followed by Rsnow(37%)and Rglacier(21%).In terms of inter-annual variation,Rrain and Rsnow show increasing trends(0.93(p0.05)mm per year),while Rglacier exhibits an insignificant(p>0.05)decreasing trend(-0.12 mm per year),leading to an increasing trend in total runoff(1.12 mm per year,p>0.05).The attribution analysis indicates that changes in precipitation and temperature contribute 8.16 and 10.37 mm,respectively,to the increase in runoff at the mean annual *** wetting(increased precipitation)increases Rrain(5.03 mm)and Rsnow(3.19 mm)but has a limited effect on Rglacier(-0.06 mm),while warming increases Rrain(10.69 mm)and Rglacier(5.79 mm)but decreases Rsnow(-6.12 mm).The negative effect of glacier shrinkage on Rglacier has outweighed the

关键词： tian Shan Rainfall runoff Snowmelt runoff Glacier meltwater Warming-wetting Tipping point

Statistical study on interplanetary drivers behind intense geomagnetic storms and substorms

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Earth and Planetary Physics 2019年第5期3卷 380-390页

作者： tian tian Zheng Chang LingFeng Sun JunShui bai XiaoMing Sha ze Gao Mailbox 5111 Beijing 100094China National Space Science center Chinese Academy of SciencesBeijing 100190China

Geomagnetic storms and substorms play a central role in both the daily life of mankind and in academic space *** profiles of storms,especially their initial phase morphology and the intensity of their substorms under different interplanetary conditions,have usually been ignored in previous *** this study,97 intense geomagnetic storms(Dstmin≤–100 nT)between 1998 and 2018 were studied statistically using the double superposed epoch analysis(DSEA)and normalized superposed epoch analysis(NSEA)*** storms are categorized into two types according to different interplanetary magnetic field(IMF)Bz orientations:geomagnetic storms whose IMF is northward,both upstream and downstream relative to the interplanetary shock,and geomagnetic storms whose upstream and downstream IMF is consistently *** further divide these two types into two subsets,by different geomagnetic storm profiles:Type Ⅰ/Type Ⅱ—one/two-step geomagnetic storms with northward IMF both upstream and downstream of the interplanetary shock;Type Ⅲ/TypeⅣ—one/two-step geomagnetic storms with southward IMF both upstream and downstream of the interplanetary *** results show that:(1)geomagnetic storms with northward IMF both upstream and downstream of the interplanetary shock have a clear initial phase;geomagnetic storms with southward IMF in both upstream and downstream of the interplanetary shock do not;(2)the IMF is an important controlling factor in affecting the intensity characteristics of *** Bz is positive before and after the interplanetary shock arrival,the Auroral Electrojet(AE)index changes gently during the initial phase of geomagnetic storms,the median value of AE index is maintained at 500–1000 nT;(3)when Bz is negative before and after the interplanetary shock arrival,the AE index rises rapidly and reaches its maxmum value about one hour after storm sudden commencements(SSC),although the time is scaled between reference points and the maximum value of AE is

关键词： geomagnetic storms substorms normalized superposed epoch analysis initial phase IMF Bz

Local multi-model integrated soft sensor based on just-in-time learning for mechanical properties of hot strip mill process

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Journal of Iron and Steel Research International 2021年第7期28卷 830-841页

作者： Jie Dong Ying-ze tian Kai-xiang Peng Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education School of Automation and Electrical EngineeringUniversity of Science and Technology BeijingBeijing 100083China National Engineering Research Center for Advanced Rolling Technology University of Science and Technology BeijingBeijing 100083China

The mechanical properties of hot rolled strip are the key index of product quality,and the soft sensing of them is an important decision basis for the control and optimization of hot rolling *** solve the problem that it is difficult to measure the mechanical properties of hot rolled strip in time and accurately,a soft sensor based on ensemble local modeling was ***,outliers of process data are removed by local outlier *** standardization and transformation,normal data that can be used in the model are ***,in order to avoid redundant variables participating in modeling and reducing performance of models,feature selection was applied combing the mechanism of hot rolling process and mutual information among ***,features of samples were extracted by supervised local preserving projection,and a prediction model was constructed by Gaussian process regression based on just-in-time learning(JITL).Other JITL-based models,such as support vector regression and gradient boosting regression tree models,keep all variables and make up for the lost information during dimension ***,the soft sensor was developed by integrating individual models through stacking *** and reliability of proposed soft sensors were verified by actual process data from a real hot rolling process.

关键词： Soft sensor Just-in-time learning Multi-model Hot rolling

An algorithm based on evidence theory and fuzzy entropy to defend against SSDF

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Journal of Systems Engineering and Electronics 2020年第2期31卷 243-251页

作者： YE Fang bai Ping tian Yuan College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001China

In cognitive radio networks, spectrum sensing is one of the most important functions to identify available spectrum for improving the spectrum utilization. Due to the open characteristic of the wireless electromagnetic environment, the wireless network is vulnerable to be attacked by malicious users(MUs), and spectrum sensing data falsification(SSDF) attack is one of the most harmful attacks on spectrum sensing performance. In this article,an algorithm based on the evidence theory and fuzzy entropy is proposed to resist SSDF attacks. In this algorithm, secondary users(SUs) obtain the corresponding degree of membership function and basic probability assignment function based on the local energy detection result. The new conflicting coefficient is calculated based on the evidence distance and classical conflicting coefficient, and the conflicting weight of the evidence is *** fuzzy weight is calculated by the fuzzy entropy. The credibility weight is obtained by updating the credibility. On this basis, the probability assignment function of the evidence is corrected, and the final result is obtained by using the fusion formula. Simulation results show that the proposed algorithm has a higher detection probability and lower false alarm probability than other *** can effectively defend against SSDF attacks and improve the performance of spectrum sensing.

关键词： cooperative spectrum sensing evidence theory fuzzy entropy spectrum sensing data falsification(SSDF)

On Mbius Form and Mbius Isoparametric Hypersurfaces

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Acta Mathematica Sinica,English Series 2009年第12期25卷 2077-2092页

作者： ze Jun HU Xiao Li tian Department of Mathematics Zhengzhou University Zhengzhou 450052 P. R. China Department of Humanities and Social Sciences He 'nan Vocational and Technical College of Communications Zhengzhou 450007 P. R. China

An umbilic-free hypersurface in the unit sphere is called MSbius isoparametric if it satisfies two conditions, namely, it has vanishing MSbius form and has constant MSbius principal curvatures. In this paper, under the condition of having constant MSbius principal curvatures, we show that the hypersurface is of vanishing MSbius form if and only if its MSbius form is parallel with respect to the Levi-Civita connection of its MSbius metric. Moreover, typical examples are constructed to show that the condition of having constant MSbius principal curvatures and that of having vanishing MSbius form are independent of each other.

关键词： Mobius isoparametric hypersurface Mobius second fundamental form Mobius metric MSbius form paxallel Mobius form

A Solvability Criterion for Finite Groups

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Acta Mathematica Sinica,English Series 2016年第8期32卷 982-992页

作者： Guo Hua QIAN tian ze LI Department of Mathematics Changshu Institute of Technology

We show that if for every prime p, the normalizer of a Sylow p-subgroup of a finite group G admits a p-solvable supplement, then G is solvable. This generalizes a solvability criterion of Hall which asserts that a fin... 详细信息

关键词： Finite group solvable group Sylow normalizer supplement

海水制革过程中牛皮微观结构变化及蓝湿革性能

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皮革科学与工程 2025年第1期35卷 42-51页

作者：林可心胡礼智牛泽温会涛田振华兴业皮革科技股份有限公司国家企业技术中心福建晋江362271 陕西科技大学轻工科学与工程学院陕西西安710021 福建省皮革绿色设计与制造重点实验室福建晋江362271

采用海水代替工业水设计蓝湿革加工工艺,获得海水加工牛皮(HS)蓝湿革。以工业水加工的牛皮(GS)为对照组,考察各工序中HS的微观结构以及蓝湿革的热稳定性、感官性能和物理性能。结果表明,海水对浸灰工序的影响最大,HS灰皮中胶原纤维松散... 详细信息

采用海水代替工业水设计蓝湿革加工工艺,获得海水加工牛皮(HS)蓝湿革。以工业水加工的牛皮(GS)为对照组,考察各工序中HS的微观结构以及蓝湿革的热稳定性、感官性能和物理性能。结果表明,海水对浸灰工序的影响最大,HS灰皮中胶原纤维松散程度较低,主要是由于海水中氯化钠的存在抑制了裸皮的碱膨胀;HS蓝湿革中铬含量低于GS;HS蓝湿革的热稳定性、柔软度、透水汽性低于GS蓝湿革;但均能满足生产工艺的需求。同时,HS的纤维编织更为紧密,使得其抗张强度、撕裂强度和崩裂强度等力学性能均优于GS,且视密度和感官性能评价略高,体现出海水制革的优越性。

关键词：制革海水牛皮微观结构蓝湿革热稳定性物理性能