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Two-stage sequential sampling for two rare species in western Inner Mongolia of China

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Chinese Science Bulletin 2013年第4期58卷 507-516页

作者： shi jingjing ZHAO TianZhong LEI YuanCai School of Information Science and Technology Beijing Forestry University Research Institute of Forest Resource Information Techniques Chinese Academy of Forestry

To evaluate the efficiencies of different sampling methods for a rare and clustered population, we investigated the sampling effects for the two species Tamarix chinensis (Salt cedar) and Elaeagnus angustifolia (Russian olive) in western Inner Mongolia with two-stage sequential sampling, which is a new sampling method, traditional simple random sampling and two-stage sampling. Based on two-stage sequential sampling and two-stage sampling, each population was partitioned into four primary sampling units, and then two of them were randomly selected. Sampling designs were simulated based on the conditions of five secondary sampling unit areas, two criterion values, five initial secondary sampling units and two sequential secondary sampling units in 1000 repetitions. To evaluate the performance of the sampling designs for each method, the variance and relative error of the density estimates were used. The relative sampling efficiencies of the three sampling methods were compared using the same final sampling sizes. We analyzed the sampling efficiency generated by two-stage sequential sampling and found that it yielded smaller variances than those of simple random sampling and two-stage sampling in all sampling designs, and that two-stage sampling was more efficient than simple random sampling. Density estimates from the two-stage sequential sampling were very close to the true values. We also determined the optimum secondary sampling unit areas for the two species in the two-stage sequential sampling. It was best for Tamarix chinensis and Elaeagnus angustifolia when the secondary sampling unit areas were 200 and 100 m2 , respectively.

关键词：顺序采样内蒙古西部物种简单随机抽样中国采样方法采样设计密度估计

A novel threshold-based quadrature signaling scheme for cooperative networks

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Science China(Information Sciences) 2014年第6期57卷 31-39页

作者： SONG XinHai GE JianHua shi jingjing LI Jing State Key Laboratory of Integrated Service Networks Xidian University

Presented is a novel threshold-based quadrature signaling(TQS)scheme for cooperative *** assigning different components of the quadrature signaling to different cooperative users and letting each user node decide whether to relay information for the other in the assigned component based on a threshold or not,independently,the TQS scheme effectively integrated the advantages of both quadrature signaling and threshold *** authors investigate the end-to-end bit error rate(BER)performance and obtain its closed-form *** to our theoretical analysis,the TQS scheme can enhance the diversity gain of a cooperative system and,meanwhile,reduce the complexity of its implementation to a great *** addition,the communication system,using TQS scheme,has the feature of easily switching between cooperative and non-cooperative ***,the numerical and simulation results show that the scheme has excellent performance as expected.

关键词： cooperative diversity digital relaying quadrature signaling threshold bit error rate

Traffic-information-utilized low-complexity relay selection for two-way AF relaying networks

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Science China(Information Sciences) 2013年第9期56卷 294-298页

作者： shi jingjing GE JianHua LI Jing GAO Yang State Key Laboratory of Integrated Service Networks Xidian University

This paper investigates a two-way amplify-and-forward multiple relaying network (TWMR-AF) and presents a novel relay selection scheme, which is appropriate for different traffic patterns and has very low implementation complexity, rendering it very attractive for practical systems. Assuming the TWMR-AF over Nakagami-m fading, the approximate expression of the overall outage probability is derived, and the diversity and code gains are then obtained. The analytical results indicate that the proposed policy achieves better outage performance than the traditional max-min relay selection scheme, as validated by the simulation results.

关键词： two-way relay amplify-and-forward relay selection traffic mode low-complexity

Titanium nitride hollow nanospheres with strong lithium polysulfide chemisorption as sulfur hosts for advanced lithium-sulfur batteries

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Nano Research 2018年第8期11卷 4302-4312页

作者： Chuanchuan Li jingjing shi Lin Zhu Yingyue Zhao Jun Lu Liqiang Xu Key Laboratory of Colloid & Interface Chemistry (Shandong University) Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan 250 I00 China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Tianjin 300071 China Faculty of Science Beijing University of Chemical Technology Beijing 100029 China

Lithium-sulfur batteries are promising electrochemical energy storage devices because of their high theoretical specific capacity and energy density. An ideal sulfur host should possess high conductivity and embrace the physical confinement or strong chemisorption to dramatically suppress the polysulfide dissolution. Herein, uniform TiN hollow nanospheres with an average diameter of N 160 nm have been reported as highly efficient lithium polysulfide reservoirs for high-performance lithium-sulfur batteries. Combining the high conductivity and chemical trapping of lithium polysulfides, the obtained S/TiN cathode of 70 wt.% sulfur content in the composite delivered an excellent long-life cycling performance at 0.5C and 1.0C over 300 cycles. More importantly, a stable capacity of 710.4 mAh.g-1 could be maintained even after 100 cydes at 0.2C with a high sulfur loading of 3.6 mg-cm-1 The nature of the interactions between TiN and lithium polysulfide species was investigated by X-ray photoelectron spectroscopy studies. Theoretical calculations were also carried out and the results revealed a strong binding between TiN and the lithium polysulfide species. It is expected that this dass of conductive and polar materials would pave a new way for the high-energy lithium-sulfur batteries in the future.

关键词： TiN hollow spheres lithium-sulfur batteries polysulfide trapping density functional theory(DFT) calculations

Synergistic action on hypnosia: Yinao capsules with pentobarbital sodium of threshold and sub-threshold dosages

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Neural Regeneration Research 2007年第2期2卷 91-94页

作者： Guilan Zhang Mingsan Miao jingjing shi Yalei Yang Henan College of Traditional Chinese Medicine Zhengzhou 450008 Henan Province China

BACKGROUND： Sedative and hypnotic drugs could cure insomnia in a dependent manner, and traditional Chinese medicine has some superiority in treating insomnia. OBJECTIVE： To observe the synergistic action of yinao capsules with pentobarbital sodium in threshold and sub-threshold dosages in hypnosia and sedation. DESIGN： A completely randomized grouping design and control experiment. SETTING： Pharmacological laboratory, College of Pharmacy, Henan College of Traditional Chinese Medicine. MATERIALS： Totally 200 grade II Kunming mice of 18 - 21 g, either male or female, were used. Yinao capsules, main ingredients of which were turtleback glue, thinleaf milkwort root, Chinese magnoliavine fruit, mythic fungus, tangshen, ginseng and grassleaf sweetflag rhizome, were offered by Chinese-American Huayi Pharmacy, Co.,Ltd. （ratified number： 040901）; Kangnaoshuai capsules, main ingredients of which were prepared rehmannia root, tuber fleeceflower root, ginseng, membranous milkvetch root, thinleaf milkwort root, Fushen, grassleaf sweetflag rhizome, spine date seed, lecithin, barbary wolfberry fruit, pueraria root, vitamin E, etc., were produced by shijiazhuang Siyao, Co.,Ltd. （ratified number： 040964）; Pentobarbital sodium was produced by China Medicine （Group） Shanghai Chemical Reagent, Co,.Ltd. （Ratified number： 030816）. ZZ-6 mice spontaneous activity apparatus was produced by Chengdu Taimeng Science and Technology, Co.,Ltd. METHODS： The experiment was carried out in the Animal Experimental Center, Henan College of Traditional Chinese Medicine from October to December in 2005. （1） Influence of Yinao capsules on the spontaneous activity of mice： Fifty mice were randomly divided into five groups with 10 mice in each group： Mice in the large, middle and small dosages of Yinao capsules groups were intragastrically infused with Yinao capsules suspension （1.36, 0.68, 0.34 g/kg）; Those in the Kangnaoshuai capsules group were infused with Kangnaoshuai suspension （1.12 g/kg）; Those in t

关键词： REINFORCING AGENTS insomnia capsules pentobarbital drug synergism

Tetra-EDOT substituted 3D electrochromic polymers with lower band gaps

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Science China Chemistry 2017年第1期60卷 90-98页

作者： jingjing shi Imran Murtaza Shan Shao Xiaosi Zhu Yang Zhao Mengmeng Zhu Osamu Goto Hong Meng School of Advanced Materials Peking University Shenzhen Graduate School Key Laboratory of Flexible Electronics & Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Department of Physics International Islamic University

A couple of novel electrochromic materials poly(2,3,4,5-tetrakis(2,3-hydrothieno[3,4-b]dixin-5-yl)-1-methyl-1H-pyrrole)(P(t-EDOT-mPy))and poly(5,5',5",5'"-(thiophene-2,3,4,5-tetrayl)tetrakis(2,3-dihydrothieno[3,4-b][1,4]dioxine))(P(t-EDOTTh))are electrodeposited via multi-position polymerization of their tetra-EDOT substituted monomers t-EDOT-mPy and t-EDOT-Th,*** with the linear 2D structured poly(thiophene)(E_g=2.2 eV)and poly(2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thiophene)(E_g=1.7eV),P(t-EDOT-Th)(E_g=1.62eV)has the lowest band ***,we speculate that the band gaps of the two polymers,having 3D structures,are decreased in contrast to non-substituted polymers or bi-EDOT substituted polymers,thiophene and *** results indicated that P(t-EDOT-Th)thin films are more stable and show higher transmittance amid two polymers,which may find their utilization in organic optoelectronics.

关键词： conjugated 3D polymers electrochromic polythiophene polypyrrole EDOT low band gap electrochemistry

High efficiency production of ginsenoside compound K by catalyzing ginsenoside Rb1 using snailase

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Chinese Journal of Chemical Engineering 2018年第7期26卷 1591-1597页

作者： Zhiguang Duan Chenhui Zhu jingjing shi Daidi Fan Jianjun Deng Rongzhan Fu Rong Huang Cuiying Fan Shaanxi Key Laboratory of Degradable Biomedical Materials School of Chemical EngineeringNorthwest UniversityTaibai North Road 229Xi'an 710069China Shanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical Engineering Northwest University Taibai North Road 229Xi'an 710069China

The rare ginsenoside Compound K （C-K） is attracting more attention because of its good physiological activity and urgent need. There are many pathways to obtain ginsenoside C-K, including chemical and biological methods. Among these, the conversion of PPD-type ginsenosides by enzymatic hydrolysis is a trend due to its high efficiency and mild conditions. For effectively extracting from the other panaxadiol saponins, the conversion process for ginsenoside C-K was investigated using snailases in this study. The univariate experimental design and response surface methodology were used to determine the optimal hydrolysis conditions for the conversion of ginsenoside Rbl into ginsenoside C-K by snailases. The optimum conditions were as follows： pH 5,12, temperature 51 ℃, ratio of snailase/substrate 0.21, and reaction time 48 h. On the basis of these parameters, the addition of 1.0 mmol· L- 1 ferric ion was found to significantly improve the enzymolysis ofsnailases for the first time. With the above conditions, the maximum conversion rate reached 89.7%, suggesting that the process can obviously increase the yield of ginsenoside C-K. The bioassay tests indicated that the ginsenoside C-K showed anti-tumor activity in a series of tumor cell lines. Based on these results, we can conclude that the process of rare ginsenoside C- K production by enzymolysis with snailase is feasible, efficient, and suitable for the industrial production and application.

关键词： Ginsenoside Rb1 Ginsenoside Compound K Snailase Enzymolysis

Effects of fufang yimucao oral liquid on acute ache model mice

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Neural Regeneration Research 2007年第6期2卷 372-375页

作者： Fengjie Wang Mingsan Miao Yulin Zhang jingjing shi Yalei Yang Huili Liu Department of Pharmacy Henan College of Traditional Chinese Medicine Zhengzhou 450008 Henan Province China

BACKGROUND： Fufang yimucao oral liquid has markedly effects on ameliorating circulation, restraining uterine constriction induced by oxytocin, alleviating dysmenorrhea, as a traditional medicine on promoting blood circulation by removing blood stasis, yimucao could ameliorate abnormal hemorrheological when hemorrhagic shock happens, enhance the hemoperfusion of organs and actively react on the result of hemorrhagic shock. OBJECTIVE： To investigate the abirritation offufang yimucao oral liquid on pain model mice induced by hot board method and acetic acid twist body method and dysmenorrhea model mice induced by estradiol. DESIGN： Entirely randomly grouping and control experiment. SETTING： Pharmacological Laboratory, Henan College of Traditional Chinese Medicine. MATERIALS： A total of 200 female Kunming genus mice of grade 2 and weighing 18- 21 g were collected. Fufang yimucao oral liquid, mainly consist ofyimucao, danggui, chuanxiong, muxiang, and so on, was produced by Henan Joyline ＆ Joysun Pharmaceutical Stock Co., Ltd. （batch number： 050701）; yimucao oral liquid was produced by Shangqiu Lvyuan Pharmaceutical Co., Ltd. （batch number： 050108）; estradiol slice by Shanghai Xinyi Kangjie Pharmaceutical Co., Ltd. （batch number： 050301）; YSL-6A intelligence hot plate instrument by Shandong Equipments Station of the Medical Science. METHODS： The experiment was carried out in the Animal Experiment Center of the Henan College of Traditional Chinese Medicine from August to November 2005. The high-, middle- and low-dosage fufang yimucao oral liquid in the experiment was 1, 0.5 and 0.25 in volume fraction, respectively, andyimucao oral liquid was 0.5. ① Among 80 mice, 60 mice were eligible in pain threshold tested by hot plate, and randomly dividing into 5 groups with 12 in each group. Mice in the high-, middle- and low-dose fufang yimucao oral liquid groups were perfused with 1 mL, 0.5 mL and 0.25 mL/mLfufang yimucao, and mice in the yimucao group and saline group were perfu

关键词： Fufangyimucao oral liquid twisting body response dysmenorrhea model

Calcium requirements for Chinese adults by cross-sectional statistical analyses of calcium balance studies： an individual participant data and aggregate data meta-regression

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Chinese Medical Journal 2014年第24期127卷 4250-4257页

作者： Fang Aiping Li Keji shi Haoyu He jingjing Li He Department of Nutrition and Food Hygiene Peking University Health Science Center Haidian District Beijing 100191 China

Background Chinese dietary reference intakes for calcium are largely based on foreign studies. We undertook meta- regression to estimate calcium requirements for Chinese adults derived from calcium balance data in Chinese adults. Methods We searched PubMed, Cochrane CENTRAL, and SinoMed from inception to March 5, 2014, by using a structured search strategy. The bibliographies of any relevant papers and journals were also screened for potentially eligible studies. We extracted a standardized data set from studies in Chinese adults that reported calcium balance data. The relationship between calcium intake and output was examined by an individual participant data （IPD） and aggregate data （AD） meta-regression. Results We identified 11 metabolic studies in Chinese adults within 18-60 years of age. One hundred and forty-one IPD （n=35） expressed as mg/d, 127 IPD （n=32） expressed as *** body wt-l-d-1, and 44 AD （n=132） expressed as mg/d were collected. The models predicted a neutral calcium balance （defined as calcium output （Y） equal to calcium intake （C）） at intakes of 460 mg/d （Y=0.60C＋183.98） and 8.27 *** body wt-l.d-1 （Y=0.60C＋3.33） for IPD, or 409 mg/d （Y=0.66C＋139.00） for AD. Calcium requirements at upper intakes were higher than that at lower intakes in all these models. Conclusion Calcium requirement for Chinese adults 18-60 years of age approximately ranges between 400 mg/d and 500 mg/d when consuming traditional plant-based Chinese diets.

关键词： calcium requirement Chinese adults individual participant data aggregate data meta-regression