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The electric dipole moment of elementary particles, resulting from favor-diagonal CP violation in the Standard Model, has the potential to provide novel insights in unraveling the enigma of the matter-dominated universe. In this paper, a comprehensive angular analysis focusing on entangled hyperon-antihyperon pairs in $J/ψ$ decays has been developed. Leveraging the statistics from the BESIII experiment, the upper limit of the $Λ$ EDM measurement can reach an impressive level of $10^{-19}$ $e$ cm, demonstrating a three-order-of-magnitude improvement over existing measurement. The measurement of the $Σ^+$, $Ξ^-$, and $Ξ^0$ hyperons at the same level of $10^{-19}$ $e$ cm will mark the first-ever achievement of its kind. The EDM measurements for hyperons conducted at the BESIII experiment will be a significant milestone and serve as a litmus test for new physics such as SUSY, and 2HDM models. Furthermore, at the STCF experiment, the sensitivity of hyperon EDM measurements can be enhanced by two orders of magnitude. Additionally, this angular analysis enables the determination of CP violation in hyperon decays, the weak mixing angle, and beam polarization.

One undescribed benzofuran derivative (illiciumphenolicacid A, 1) and one new phenolic glycoside (illiciumphenolicacid B, 2), together with six known compounds (3–8) were isolated from the leaves of Illicium dunnianum Tutcher. Their structures were elucidated by detailed spectroscopic data (UV, IR, HR-ESI-MS, 1D and 2D NMR). In addition, we determined the α-glucosidase inhibitory activity of the isolates in vitro using spectrophotometric methods. Compared with the positive control acarbose (IC50 306.2 ± 4.1 μM), compounds 1–8 were shown to be moderate potential α-glucosidase inhibitory activity with IC50 values in the range 380–655 μM.

Two undescribed labdane diterpenoids (5S,8S,9R,10S,11E)-8,17-epoxy-13,14-dinorlabd-11-en-13-one (1) and (5S,9R,10S,12E)-17-hydroxy-labd-7,12-dien-15(16)-olide (2), together with seven known sesquiterpenoids (3���9) and two known monoterpenoids (10���11) were isolated from the dried rhizome of Zingiber officinale. Their structures were elucidated by detailed spectroscopic data (IR, UV, HR-ESI-MS, 1D and 2D NMR), X-ray crystallographic and ECD analysis. Moreover, all the 11 compounds were tested for ��-glucosidase inhibitory effects and 9 was found to exhibit stronger inhibitory effects at IC50 = 4.8 ��M against a positive control acarbose with IC50 = 414.6 ��M.

As the largest genus within Paraphlomideae, the biodiversity of Paraphlomis remains to be explored. Here, P. strictiflora, a new species endemic to Fanjing Mountain in Guizhou Province, southwest China, is described and illustrated. Both our molecular phylogenetic analyses based on three plastid DNA markers (rpl32-trnL, rps16, and trnL-trnF) and nuclear ribosomal internal and external transcribed spacers (ITS and ETS) and morphological comparisons supported the treatment of P. strictiflora as a distinct species within Paraphlomis. Morphologically, P. strictiflora is most similar to P. lanceolata but can be distinguished by its much longer and conspicuously 5-veined calyx with triangular teeth, and white corolla with a straight lower lip.

Paraphlomis strictiflora J.C. Yuan, B. Chen & C.L. Xiang, sp. nov. (Figs. 1, 2) Type:— CHINA. Guizhou Province, Yinjiang County, Yangjiaping, in the forest or at streamside. 27°51′19.97″N, 108°31′55.90″E, alt. 871m, 21 Jul. 2022, Y. Zhao et al. XCL2120 (holotype: KUN!; isotypes: CSH!, K!, KUN!, PE!). Diagnosis:— Paraphlomis strictifora is morphologically most similar to P. lanceolata Handel-Mazzetti (1936: 922), but differs in its 9–12 mm long (vs. 5–7 mm) and conspicuously (vs. inconspicuously) 5-veined calyces with triangular (vs. broadly ovate-triangular) teeth, and white (vs. yellow to yellowish white) corollas with straight (vs. obviously reflexed) lower lips. Description:— Perennial herbs, stoloniferous. Stems erect, 50–70 cm tall, rarely branched, 4-angled, sulcate, base glabrous, apex retrorsely strigose, leafless toward the base. Leaves opposite; lamina ovate-lanceolate to lanceolate, herbaceous, 7–16 cm long, 2–5 cm wide, apex long acuminate, base cuneate-decurrent, margin coarsely dentateserrate, adaxially dark-green, sparsely hirsute, abaxially whitish green, sparsely hirsute on veins, lateral veins 3–5 paired; petioles 0.5–1.2 cm long. Verticillasters 2–6-flowered, widely spaced, bracteoles subulate, 1–2 mm long, sparsely strigose, pedicels ca. 2 mm long. Calyx green, obconical, 9–12 mm long, 3–4 mm in diam at apex, sparsely hispidulous on veins outside, glabrous inside, conspicuously 5-veined; teeth 5, subequal, triangular, 2–3 mm long, 2–3 mm wide, apex acute, margin hispidulous. Corolla white, 16–18 mm long; tube 8–10 mm long, ca. 1.5 mm wide, straight, pubescent annulate inside at 1/4 towards base; 2-lipped, lips subparallel, upper lip oblong, entire, erect, ca. 7 mm long, ca. 5 mm wide, densely pubescent outside, lower lip spreading and straight, ca. 8 mm long, 3-lobed, medium lobe largest, trapeziform, ca. 4 mm long, ca. 2 mm wide, margin entire, lateral lobes reflexed. Stamens 4, straight, anterior 2 longer, filament sparsely pubescent, posterior 2 shorter, filament densely pubescent, anther cells 2. Style glabrous, ca. 1.8 cm, long apex subequally 2-cleft, lobes subulate. Ovary glabrous, truncate at apex. Mericarps not seen. Phenology:— Flowering from July to August. Etymology:— The specific epithet traces back to the distinct corolla of the new species compared with that of other species of Paraphlomis, with both lips of the corolla straight and not reflexed. Distribution and habitat:— Paraphlomis strictiflora is currently only known from Fanjing Mountain National Natural Reserve in Guizhou Province, China (Fig. 3). Affected by the Southeast Asia Pacific monsoon, the Fanjing Mountains are located in the subtropical humid monsoon climate zone (Tsai et al. 2018). The new species grows on moist rocks at the streamside in evergreen broad-leaved forests at an altitude of ca. 900 m. Common name (assigned here):— zhi hua jia cao su (ĦAE假ďḟ; Chinese name). The name means a species of Paraphlomis with straight corolla in English. Additional specimens examined (paratypes):— CHINA. Guizhou Province: Yinjiang County, Chanxi Town, 27°51’19.54″N, 108°31’55.2″E, alt. 857 m, 22 Jul. 2021, B. Chen et al. CB05956 (CSH). Specimens of P. lanceolata examined: — CHINA. Hunan Province: Wugang City, Yunshan (Mt. Yun), 7 Aug. 1918, H. Handel-Mazzetti 2540 (holotype: WU0063810; isotypes: E00284169, IBSC0005125, GH00001399); Yunshan National Forest Park, 25 Jun. 2021, A. Liu & Y.K. Gong WGYS085 (KUN); Ningyuan County, Jiuyi Mountain Conservation Area, 11 Jun. 2020, A. Liu & C. Ding LK0825 (KUN); Guidong County, Oujiang Town, 11 Jul. 2020, C. Z. Huang s.n. (KUN); Yanling County, Jiuqushui, C.C. Liu et al. LXP-13-23944 (SYS00198865). Jiangxi Province: Luxi County, Wugongshan (Mt. Wugong), 26 Jun. 2017, R.L. Liu & Z.B. Tang 170626012 (GNNU0006350); Ji’an City, Jinggangshan (Mt. Jinggang), 19 Jun. 1965, S.S. Lai 4198 (KUN0277270); ibid., 9 Jul. 1965, S.S. Lai et al. 4403 (KUN0277698)., Published as part of Yuan, Jing-Chen, Chen, Ya-Ping, Zhao, Yue, Li, Hai-Bo, Chen, Bin & Xiang, Chun-Lei, 2022, Paraphlomis strictiflora (Lamioideae, Lamiaceae), a new species from Guizhou, China, pp. 276-286 in Phytotaxa 575 (3) on pages 278-280, DOI: 10.11646/phytotaxa.575.3.5, http://zenodo.org/record/7431324, {"references":["Handel-Mazzetti, H. (1936) Paraphlomis. In: Handel-Mazzetti, H. (Ed.) Symbolae Sinicae vol. 7. Springer, Vienna, pp. 921 - 922. https: // dx. doi. org / 10.5962 / bhl. title. 878","Tsai, Y. H., Stow, D., Chen, H. L., Lewison, R., An, L. & Shi, L. (2018) Mapping vegetation and land use types in Fanjingshan National Nature Reserve using Google Earth Engine. Remote Sensing 10: 927. https: // doi. org / 10.3390 / rs 10060927"]}

Paraphlomis strictiflora J.C. Yuan, B. Chen & C.L. Xiang, sp. nov. (Figs. 1, 2) Type:— CHINA. Guizhou Province, Yinjiang County, Yangjiaping, in the forest or at streamside. 27°51′19.97″N, 108°31′55.90″E, alt. 871m, 21 Jul. 2022, Y. Zhao et al. XCL2120 (holotype: KUN!; isotypes: CSH!, K!, KUN!, PE!). Diagnosis:— Paraphlomis strictifora is morphologically most similar to P. lanceolata Handel-Mazzetti (1936: 922), but differs in its 9–12 mm long (vs. 5–7 mm) and conspicuously (vs. inconspicuously) 5-veined calyces with triangular (vs. broadly ovate-triangular) teeth, and white (vs. yellow to yellowish white) corollas with straight (vs. obviously reflexed) lower lips. Description:— Perennial herbs, stoloniferous. Stems erect, 50–70 cm tall, rarely branched, 4-angled, sulcate, base glabrous, apex retrorsely strigose, leafless toward the base. Leaves opposite; lamina ovate-lanceolate to lanceolate, herbaceous, 7–16 cm long, 2–5 cm wide, apex long acuminate, base cuneate-decurrent, margin coarsely dentateserrate, adaxially dark-green, sparsely hirsute, abaxially whitish green, sparsely hirsute on veins, lateral veins 3–5 paired; petioles 0.5–1.2 cm long. Verticillasters 2–6-flowered, widely spaced, bracteoles subulate, 1–2 mm long, sparsely strigose, pedicels ca. 2 mm long. Calyx green, obconical, 9–12 mm long, 3–4 mm in diam at apex, sparsely hispidulous on veins outside, glabrous inside, conspicuously 5-veined; teeth 5, subequal, triangular, 2–3 mm long, 2–3 mm wide, apex acute, margin hispidulous. Corolla white, 16–18 mm long; tube 8–10 mm long, ca. 1.5 mm wide, straight, pubescent annulate inside at 1/4 towards base; 2-lipped, lips subparallel, upper lip oblong, entire, erect, ca. 7 mm long, ca. 5 mm wide, densely pubescent outside, lower lip spreading and straight, ca. 8 mm long, 3-lobed, medium lobe largest, trapeziform, ca. 4 mm long, ca. 2 mm wide, margin entire, lateral lobes reflexed. Stamens 4, straight, anterior 2 longer, filament sparsely pubescent, posterior 2 shorter, filament densely pubescent, anther cells 2. Style glabrous, ca. 1.8 cm, long apex subequally 2-cleft, lobes subulate. Ovary glabrous, truncate at apex. Mericarps not seen. Phenology:— Flowering from July to August. Etymology:— The specific epithet traces back to the distinct corolla of the new species compared with that of other species of Paraphlomis, with both lips of the corolla straight and not reflexed. Distribution and habitat:— Paraphlomis strictiflora is currently only known from Fanjing Mountain National Natural Reserve in Guizhou Province, China (Fig. 3). Affected by the Southeast Asia Pacific monsoon, the Fanjing Mountains are located in the subtropical humid monsoon climate zone (Tsai et al. 2018). The new species grows on moist rocks at the streamside in evergreen broad-leaved forests at an altitude of ca. 900 m. Common name (assigned here):— zhi hua jia cao su (ĦAE假ďḟ; Chinese name). The name means a species of Paraphlomis with straight corolla in English. Additional specimens examined (paratypes):— CHINA. Guizhou Province: Yinjiang County, Chanxi Town, 27°51’19.54″N, 108°31’55.2″E, alt. 857 m, 22 Jul. 2021, B. Chen et al. CB05956 (CSH). Specimens of P. lanceolata examined: — CHINA. Hunan Province: Wugang City, Yunshan (Mt. Yun), 7 Aug. 1918, H. Handel-Mazzetti 2540 (holotype: WU0063810; isotypes: E00284169, IBSC0005125, GH00001399); Yunshan National Forest Park, 25 Jun. 2021, A. Liu & Y.K. Gong WGYS085 (KUN); Ningyuan County, Jiuyi Mountain Conservation Area, 11 Jun. 2020, A. Liu & C. Ding LK0825 (KUN); Guidong County, Oujiang Town, 11 Jul. 2020, C. Z. Huang s.n. (KUN); Yanling County, Jiuqushui, C.C. Liu et al. LXP-13-23944 (SYS00198865). Jiangxi Province: Luxi County, Wugongshan (Mt. Wugong), 26 Jun. 2017, R.L. Liu & Z.B. Tang 170626012 (GNNU0006350); Ji’an City, Jinggangshan (Mt. Jinggang), 19 Jun. 1965, S.S. Lai 4198 (KUN0277270); ibid., 9 Jul. 1965, S.S. Lai et al. 4403 (KUN0277698).

Background. Immunoglobulin E (IgE) is the most important promoter of allergic inflammation. However, there are few systematic studies on IgE in age range, genders, disease spectrum, and time regularity. Aim. To screen the common allergens, allergen spectrum, and IgE difference between type 2 inflammatory allergic diseases and other allergic diseases in Weifang, China. Methods. A retrospective study was performed by estimating patients’ clinical data suffering from allergic diseases (urticaria, pollinosis, allergic rhinitis, atopic dermatitis, and bronchial asthma) between May 2019 and April 2020 using an allergen detection kit of Macro-Union Pharmaceutical. Results. 732 of the 1367 patients showed different antigen positive, and the positive rate was 53.5%. The most common allergens were dust mites, mixed fungi, Artemisia pollen, cat/dog dander, and cockroaches. There were 27.0% (369/1367) of the patients with single positive allergen-specific IgE (sIgE), 26.5% (363/1367) with multiple-positive IgE. The total immunoglobulin E (tIgE) levels varied with gender, age, and type of disease. There was a difference in the distribution of allergens between children and adults. A positive correlation between the serum-specific IgE and the corresponding local inhaled allergen density was observed. Conclusions. In this study, we found that type 2 inflammatory allergic diseases have higher serum IgE and a higher probability of inhaled sIgE positive. According to age, gender, and condition, serological IgE detection of allergens provides new insight into the early diagnosis and prevention of allergic diseases.

In this paper, we present a preliminary study of $CP$ violation effect of $K^{0}-\bar{K}^{0}$ system in $J/ψ$ decay. The $CP$ violation parameters $η_{+-}$ and $η_{00}$ as well as their corresponding phase $ϕ_{+-}$ and $ϕ_{00}$ can be determined by the difference of the time-dependent decay rates between $K^{0}$ and $\bar{K}^{0}$ produced from $J/ψ\rightarrow K^{-}π^{+}K^{0} + c.c.$ processes. We investigate the precisions of the measurements of the CP violation effect at the Super Tau-Charm facility(STCF), a $e^{+}e^{-}$ collider with a peak luminosity of $0.5\times10^{35}\ \rm{cm}^{-2}\rm{s}^{-1}$. The parameters $η_{+-}$ and its phase $ϕ_{+-}$ can be measured at a relative precision of $1 \times 10^{-3}$, which the statistical accuracy will be several times better than that of the existing PDG average values.

Two new chemical constituents, japopenoid D (1), and japopenoid E (2), were isolated and identified from the flower buds of Lonicera japonica Thunb. The structures of these compounds were elucidated based on spectroscopic analysis (HR-ESI-MS, NMR), and the absolute configurations of 1 and 2 were determined by comparison of their electronic circular dichroism (ECD) spectra with literature and theoretical calculation. The anti-inflammatory activities of the isolates were evaluated by measuring their inhibitory effects on PGE2 and IL-6 production in LPS stimulated RAW 264.7 macrophages. As a result, compound 1 could reduce PGE2 and IL-6 levels in LPS-activated RAW 264.7 macrophages with IC50 values of 6.78 and 42.07 μM, respectively.

Based on the mechanism of neutral meson mixing, we predict the branching fraction of the semileptonic decay of $D_s^+\to ��^0 \ell^+ ��_\ell$ ($\ell=e$, $��$) using recently measured branching fraction of $D_s^+\to ��e^+��_e$ by BESIII experiment . We also give a formula that can describe the neutral meson mixing of $��^0$, $��$, $��'$ and a pseudoscalar gluonium $G$ in a unified way. The predicted branching fraction of $D_s^+\to��^0 e^+��_e$ decay is $\mathcal{B}(D_s^+\to��^0 e^+��_e)=(2.65\pm 0.38)\times 10^{-5}$. It is important to search for the decay $D_s^+\to ��^0 \ell^+ ��_\ell$ in experiment, in order to understand the mechanism of $��^0$ production in $D_s^+\to��^0$ transition in semileptonic decay. We also estimate the branching fraction of $D_s^+\to ��^0��^+��_��$, which is the only kinematically allowed semi-tauonic decay mode of the charmed meson, since the mass value of $D_s^+$ meson is just slightly above the threshold of $��^0��^+$ generation in the semi-tauonic decay., 6 pages, 1 figure

The influence of hydrostatic pressure on rock-cutting based on Voronoi grain bonded-cluster model is investigated in this paper. Unconfined compressive strength and Brazilian tests are performed to calibrate the relations between micro-properties and mechanical properties of the rock sample. The influences of hydrostatic pressure, cutting velocity and cutting depth on rock-cutting are researched by particle flow code in 2 dimensions. With no hydrostatic pressure, the fractures in the upper area developed rather quickly into the rock along the horizontal direction when the cutter penetrates over 4 mm. The horizontal crack could eventually arrive at the free surface causing a large volume of fragment chips. Hydrostatic pressure could significantly influence the fracture evolution, inhibiting the formation of the long horizontal fracture. The influence of hydrostatic pressure on rock cutting becomes more and more obvious when the hydrostatic pressure is over 5 MPa. High hydrostatic pressure could inhibit the development of the fractures, increasing the energy requirements of drilling and effectively strengthening the rock. The influence of velocity on rock cutting is not obvious when the cutter penetration is less than 1 mm. However, the fracture volume presents a decreasing trend as the cutting velocity is increasing. There is an optimal cutting velocity for rock cutting, the corresponding optimal cutting velocity is 300 mm/s with high rock fragmentation efficiency. As the cutting depth increases, more and more micro-cracks are initiated around the cutter and the volume of the chipped fragmentation is increasing correspondingly. According to the simulation, it is believed that Voronoi grain-based model will contribute to a better understanding for the rock-tool interaction.

We study the electromagnetic Dalitz (EM) decays, $��\to ��_{c} l^{+} l^{-}$ and $��\to ��_{b} l^{+} l^{-}$ ($l = e$ or $��$), in which the lepton pair comes from the virtual photon emitted by the M1 transition from $c\bar{c}$ ($b\bar{b}$) spin triplet state to the spin singlet state. We estimate the partial width of $��(��) \to ��_{c}(��_{b}) l^{+} l^{-}$, based on the simple pole approximation. Besides, based on different QCD models, the partial width of $��(��) \to ��_{c}(��_{b}) ��$ is determined.

The concentration characteristics of water-soluble ions in atmospheric fine particulate matter PM2.5 in Shenyang City were studied. Correlation analysis was carried out on the tested components. The results showed that SO42- and NO3- in the water-soluble ion concentration of PM2.5 in Shenyang City. The three ions of NH4+ account for a higher total ion concentration, accounting for 35.2%, 34.7%, and 11.6%, respectively. It was found that due to the unique terrain and climate of Shenyang, the spring pollution was more serious. Correlation analysis showed that the main forms of water-soluble ions in PM2.5 in Shenyang City were NO3NH4, KNO3, MgSO4, CaSO4 and so on.

Using measured branching fraction of the decay $J/��\rightarrow��Y(2175))\rightarrow����f_0(980)\rightarrow������^+��^{-}$ from the BESIII experiment, we estimate branching fraction of $J/��\rightarrow��Y(2175))\rightarrow����f_0(980)\rightarrow��������^{0}$ decay, which proceeds via the $f_0(980)$-$a_0^0(980)$ mixing and the $��^0$-$��$ mixing. The branching fraction is predicted to be about $O(10^{-6})$, which can be accessed with $10^{10}$ $J/��$ events collected at the BESIII. The decay is dominated by the contribution from $f_0(980)$-$a_0^0(980)$ mixing. We find that the interference between the amplitudes due to $f_0(980)$-$a_0^0(980)$ mixing and that due to $��^0$-$��$ mixing is destructive. The branching fraction can be decreased by about $10\%$ owing to the interference effect. We also study the $����^0$ mass squared spectrum, and find that a narrow peak due to the $f_0(980)$-$a_0^0(980)$ mixing in the $����^0$ mass squared spectrum should be observed. The observation of this decay in experiment will be helpful to determine the $f_0(980)$-$a_0^0(980)$ mixing intensity and get information about the structures of the light scalar mesons., 16 pages, 3 figures

Thermal stability of quantum dot( QD) luminescence is considered as an important factor for their applications in luminescent devices because of the Joule heat caused by inevitable current. The temperaturedependent photoluminescence( PL) properties of Mn-doped Zn Se( Mn∶ Zn Se) QDs with different shell thickness in the temperature range from 80 to 500 K were studied by steady-state and time-resolved PL spectra. It was found that the Mn∶ Zn Se QDs with thick shell( 6. 5 monolayers( MLs)) exhibited better PL thermal stability than the thin shell coated ones( 2. 6 MLs). Because almost no PL quenching occurred for thick shell-coated Mn-doped QDs from 80 to 400 K,their PL quantum yield( QY) could keep 60% even at 400 K. Moreover,based on the change in temperature-dependent PL intensities and lifetimes of Mn ∶ Zn Se QDs,the thermal quenching mechanism was proposed. Finally,the stability of Mn∶ Zn Se QDs with different shell thickness are discussed on the basis of heating-cooling cycling examination( 300-500-300 K). For Mn∶ Zn Se QDs with thick shell,the PL was nearly totally recovered after the cycling examination. Thus,Mn∶ Zn Se QDs are promising for applications in luminescent devices,where strong thermal effect is inevitable.

Cu-doped quantum dots( QDs) were used as color converting materials for preparing efficient white light-emitting diodes( LEDs). The Cu-doped QDs synthesized by chemical method showed composition-tunable emission from green to deep red and large Stokes shifts. By using the combination of green light-emitting Zn In S∶ Cu QDs and red emitting Zn Cd S∶ Cu QDs with blue Ga N chips,a high color rendering white LED was fabricated. The resulting three-band RGB QD-white LED exhibits high performance with luminous efficacy of 71 lm / W,color rendering index up to 94,CIE-coordinates of( 0. 352 4,0. 365 1),and color temperature of 4 788 K. Based on the changes in the photoluminescence lifetimes of Cu-doped QDs,it is found that the energy transfer process from green Zn In S∶ Cu QDs to red Zn Cd S∶ Cu QDs can be negligible,because the red QDs had no absorption at green band. These results suggest that Cu-doped QDs are promising for solid state lighting.

Within the QCD light-cone sum rule (LCSR) approach, we investigate the transition form factors of $D\rightarrow a_0(980)$ up to the twist-3 light-cone distribution amplitudes (LCDAs) of the scalar meson $a_0(980)$ in the two-quark picture. Using these form factors, we calculate the differential decay widths and branching ratios of the $D\rightarrow a_0(980) e^+ ��_e$ semileptonic decays. We obtain ${\mathcal B}(D^0\rightarrow a_0^- (980) e^+ ��_e)=(4.08^{+1.37}_{-1.22})\times 10^{-4}$ and ${\mathcal B}(D^+\rightarrow a_0^0 (980) e^+ ��_e)=(5.40^{+1.78}_{-1.59})\times 10^{-4}$. The results are sensitive to the $a_0(980)$ inner structure. These decays can be searched for at BESIII experiment, and any experimental observations will be useful to identify internal quark contents of the $a_0(980)$ meson, which will shed light on understanding theoretical models., 19 pages,5 figures

Drill and blast is a major method for bed rock excavation in nuclear power plant engineering. Under blasting excavation, blast-induced vibration propagates in rock mass and induces damage to surrounding rock. Studying the characteristics of wave propagation and blast-induced damage to rock mass is most important to restrict the damage extension. In the present paper, in support of the bedrock blasting excavation for the Linao Nuclear Power Plant project (LNPP), the site seismic survey and sonic wave test are presented to study the characteristics of wave propagation and the blast-induced damage for rock mass. The explosive load, rock damage characteristics and peak particle velocity (PPV) attenuation law are also investigated by numerical simulation using commercial software. It can be seen that the numerical simulation results agree well with that obtained by site monitoring. Based on the site monitoring and the numerical simulation, the relationship between PPV at 30 m away from the charge hole and the damage depth of rock mass is established. A simple method based on safety threshold of vibration velocity for rock mass to restrict the damage depth of rock mass under blasting excavation is presented. According to the damage controlled method and the presented safety threshold of vibration velocity for rock mass, the remained bedrock can be simply and effectively protected during blasting excavation. (C) 2010 Elsevier Ltd. All rights reserved.

Abundant Ψ' events have been collected at the Beijing Electron Positron Collider- II (BEPCII) that could undoubtedly provide us with a great opportunity to study the more attractive charmonium decays. As has been noticed before, in the process of J/Ψ decaying to the baryonic final states, pK−, the evident Λ* and N* bands have been observed. Similarly, by using the product of χcJ from Ψ' radiative decay, we may confirm this or find some extra new resonances. χc0's data samples will be more than χc1,2, taking into account the larger branching ratio of Ψ' → γχc0. Here, we provide explicit partial wave analysis formulae for the very interesting channel Ψ' → γχc0 → γpK−.

The calibration algorithm for RPC-based union detector at BESIII has been developed. The calibration method, calibration error and algorithm performance are studied. The primary results of efficiency and noise at layer, module and strip levels have been calibrated with cosmic ray data. The calibration constants are available for simulation and reconstruction timing. The results of Monte Carlo and data are also compared to check the validation and reliability of the algorithm.

Decays of both η and η' provide very useful information in our understanding of low-energy QCD, and experimental signatures for these decays would be extremely helpful at BES-III. The rare decays of the η and η' mesons could serve as a low-energy test of the Standard Model and its beyond. The sensitivities of the measurements of η and η' decays are discussed at BES-III, in which the η and η' mesons are produced in the ψ decays.

We study the branching ratios of D+→D0e+ν,DS+→D0e+ν,BS0→B+e-ν,DS+→D+e-e+ and BS0→B0e-e+ rare semileptonic decay processes,which are induced by decays of light quarks,the heavy quarks remain unchanged.The branching ratios of these decay processes are estimated in the heavy quark limit and with SU(3) ...

Cosmic-ray data of 90 M events have been collected and used for calibration, alignment as well as detector tuning. A special tracking algorithm for the BESIII muon counter is developed and verified with Monte-Carlo simulation and then further confirmed with the cosmic-ray data. The obtained strip resolutions are in good agreement with the design values. A new alignment approach for the BESIII muon counter is confirmed with the cosmic-ray data and proposed to be used in future analysis of experimental data.

Software alignment is quite important for a tracking detector to reach its ultimate position accuracy and momentum resolution. We developed a new alignment algorithm for the BESIII Main Drift Chamber using the Kalman Filter method. Two different types of data which are helix tracks and straight tracks are used to test this algorithm, and the results show that the design and implementation is successful.

The principle of the method for the BESIII event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking by the Monte Carlo physics data sample are also presented. The preliminary results got from the Monte Carlo simulation are presented, the reconstruction efficiency of J/ψ → anything events at noise level 0~60% can achieve above 99%, and the error rate is below 1%.

The results of a study of event tagging strategies for elementary physics processes in the τ-charm region are presented. The algorithm for online event filtering is optimized by adopting the information provided by different sub-detectors according to their strengths and capacities. The algorithm is tested with various generated physics and background events. The results indicate that the algorithm satisfies the requirements of BESIII physics analysis and its DAQ system.

Material effect of inner-detectors on the performances of the BESIII Electromagnetic Calorimeter (EMC) is investigated. The BESIII Time-Of-Flight counters (TOF) have been utilized to improve the energy resolution and detection efficiency for photons after a careful energy calibration. A matching algorithm between TOF and EMC energy deposits is developed, and the effects of beam-related background are discussed. The energy resolution is improved and the photon detection efficiency can be increased by the combined measurement of EMC and TOF detectors.

A multilayered perceptrons' neural network technique has been applied in the particle identification at BESIII. The networks are trained in each sub-detector level. The NN output of sub-detectors can be sent to a sequential network or be constructed as PDFs for a likelihood. Good muon-ID, electron-ID and hadron-ID are obtained from the networks by using the simulated Monte Carlo samples.

The phenomena of electron, neutron, atomic and molecular diffraction have been studied by many experiments, and these experiments are explained by some theoretical works. In this paper, we study electronic double-slit diffraction with quantum mechanical approach. We can obtain the results: (1) When the slit width $a$ is in the range of $3\lambda\sim 50\lambda$ we can obtain the obvious diffraction patterns. (2) when the ratio of $\frac{d+a}{a}=n (n=1, 2, 3,\cdot\cdot\cdot)$, order $2n, 3n, 4n,\cdot\cdot\cdot$ are missing in diffraction pattern. (3)When the ratio of $\frac{d+a}{a}\neq n (n=1, 2, 3,\cdot\cdot\cdot)$, there isn't missing order in diffraction pattern. (4) We also find a new quantum mechanics effect that the slit thickness $c$ has a large affect to the electronic diffraction patterns. We think all the predictions in our work can be tested by the electronic double-slit diffraction experiment., Comment: 9pages, 14figures

An investigation was made on the abundance and biomass of planktonic ciliates in the shelf of East China Sea in May (spring) and November (autumn), 2011. The abundance of the ciliates in spring and autumn was averagely (614 +/- 861) and (934 +/- 809) ind x L(-1), and the biomass was averagely (1.70 +/- 3.91) and (0.93 +/- 0.99) microg C x L(-1), respectively. The high abundance and biomass in spring were found in coastal and offshore areas, and those in autumn were in offshore only. In the two seasons, the ciliates tended to accumulate in the waters upper layer, and sometimes flocked in the bottom. In the spring, aloricate ciliate species were larger than those in the autumn. Tintinnids occupied (26.9% +/- 34.3)% and (44.9% +/- 25.2)% of the total ciliates abundance in spring and autumn, respectively. In taxonomy, 52 tintinnid species of 27 genera were identified. The most dominant species were Tintinnidium primitivum, Stenosemella oliva, and Tintinnopsis tubulosoides in spring, and Tintinnidium primitivum, Stenosemella parvicollis, and Tintinnopsis nana in autumn. The ciliates abundance showed significant positive correlations with water temperature and Chl a concentration, the tintinnids abundance showed significant negative correlation with water salinity, and the tintinnids community was significantly related to water temperature.

We study the electromagnetic Dalitz decay modes of $J/��\rightarrow P l^+l^-$ ($P= ��^0$, $��$ or $��^\prime$). In these decays, the lepton pairs are formed by internal conversion of an intermediate virtual photon with invariant mass $m_{l^+l^-}$. Study of the effective-mass spectrum of the $l^+l^-$ will shed light on the dynamic transition form factor $F_{J/��P}(q^2)$ ($q^2 = m^2_{l^+l^-}$), which characterizes the electromagnetic structure arising at the vertex of the transition $J/��$ to pseudoscalars. We also discuss the direct productions of a GeV scale vector $U$ boson in these processes $J/��\rightarrow PU$ ($U\rightarrow l^+l^-$). It is responsible for mediating a new $U(1)_d$ interaction, as recently exploited in the context of weakly interacting massive particle dark matter. In this paper, we firstly use the usual pole approximation for the form factor to estimate the decay rate of $J/��\rightarrow P l^+l^-$ in the standard model. Then the reach of searching for the dark photon is estimated. We suggest that these Dalitz decays can be used to search for the light $U$ boson in the BESIII experiment with a huge $J/��$ data set., 6 pages, 3 figure, add two more figures, more discussions

BESIII had collected large data samples on $J/\psi$ and $\psi^\prime$ peaks during the first run in 2009. From 2010 to 2011, about 2.9 fb$^{-1}$ integrated luminosity were obtained on the peak of $\psi(3770)$ for open charm physics. We review recent results on charmonium decays and hadron spectroscopy. The prospects on open charm physics are also discussed., Comment: 14 pages, 11 figures, Proceeding for XIV International Conference on Hadron Spectroscopy (hadron2011), 13-17 June 2011, Munich, Germany

The semileptonic $D_{l4}$ decay including $D\to K��l��$ and $D\to ����l��$ have been extensively studied. In these references, the form factors and differential decay rate are explicitly stated. However, we would like to stress that in these papers the final state interactions are often overlooked, i.e. rescattering effect of the pseudoscalars produced by $D_{l4}$ decay may be very important, at least on the side of phase of form factors due to Watson's theorem. In this short paper, we will display this rescattering effect in the framework of heavy hadron chiral perturbation theory, it thus must be a very useful and indispensable supplement of the previous papers on $D_{l4}$ study., This paper has been withdrawn by the author

We have analyzed the $D\rightarrow ��K, KK$ decay with the naive factorization (NF), QCD factorization (QCDF)and QCD factorization including soft-gluon exchanges (QCDF+SGE). In these decay channels, the soft-gluon effects are firstly calculated with light cone QCD sum rules. Comparing the three kind approaches, we can find the calculation results have made much more improved QCD factorization (QCDF) than the naive factorization (NF), and the calculation results have also made improved QCD factorization including soft-gluon exchanges (QCDF+SGE) than the QCD factorization (QCDF) in the color-suppressed decay channels. In addition, we find the soft-gluon effects are larger than the leading order contributions, and the calculation results are close to the experimental data for the color-suppressed decay channels. In color-allowed decay channel $D^{0}\rightarrow ��^{+} K^{-}$, the soft-gluon effects are small and we should consider other power terms, such as final state interaction and annihilation effects.

We exploit the angular and quantum correlations in the $D\bar{D}$ pairs produced through the decay of the $��(3770)$ resonance in a charm factory to investigate CP-violation in two different ways. We consider the case of $��(3770)\rightarrow D\bar{D}\rightarrow (V_1V_2)(K��)$ decays, which provide a new way to measure the strong phase difference $��$ between Cabibbo-favored and doubly-Cabibbo suppressed $D$ decays required in the determination of the CKM angle $��$. We also build CP-violating observables in $��(3770)\rightarrow D\bar{D}\rightarrow (V_1V_2)(V_3 V_4)$ to isolate specific new physics effects in the charm sector. Neglecting the systematics, we give a first rough estimate of the sensitivities of these measurements at BES-III with an integrated luminosity of 20 fb$^{-1}$ at $��(3770)$ peak and at a future super $��$-charm factory with a luminosity of $10^{35}$ cm$^{-2}$s$^{-1}$, 4 pages, in Pos style, Proceeding for ICHEP2010, Paris

In this paper, we study CP violation in $��_c^+\to BP$ and $��_c^+\to BV$ decays, where $B,P$ and $V$ denote a light spin-1/2 baryon, pseudoscalar and a vector meson respectively. In these processes the $T$ odd CP violating triple-product (TP) correlations are examined. The genuine CP violating observables which are composed of the helicity amplitudes occurring in the angular distribution are constructed. Experimentally, by performing a full angular analysis it is shown how one may extract the helicity amplitudes and then obtain the TP asymmetries. We estimate the TP asymmetries in $\lam$ decays to be negligible in the standard model making these processes an excellent place to look for new physics. Taking a two Higgs doublet model, as an example of new physics, we show that large TP asymmetries are possible in these decays. Finally, we discuss how BES-III and Super $��$-Charm experiments will be sensitive to these CP violating signals in $��_c^+$ decays., 7 pages, 2 tables. Journal reference is added

The abundant $��'$ events have been collected at the Beijing Electron Positron Collider-II (BEPCII) that could undoubtedly provide us with a great opportunity to study the more attractive charmonium decays. As has been noticed before, in the process of $J/��$ decaying to the baryonic final states, $p K^- \bar��$, the evident $��^*$ and $N^*$ bands have been observed. Similarly, by using the product of $��_{cJ}$ from $��'$ radiative decay, we may confirm it or find some extra new resonances. $��_{c0}$'s data samples will be more than $��_{c1,2}$ taking into account the larger branching ratio of $��'\to����_{c0}$. Here, we provide explicit partial wave analysis formulae for the very interesting channel $��'\to����_{c0}\to ��p K^- \bar��$., 7 pages, 1 figure, version in Chin.Phys.C

Decays of both $��$ and $��^\prime$ provide very useful information in our understanding of low-energy QCD, and experimental signatures for these decays would be extremely helpful at BES-III. The rare decays of the $��$ and $��^\prime$ mesons could serve as a low-energy test of the Standard Model and its beyond. The sensitivities of the measurements of $��$ and $��^\prime$ decays are discussed at BES-III, in which the $��$ and $��^\prime$ mesons are produced in the $��$ decays., A few corrections added, published at J. Phys. G: Nucl. Part. Phys

We discuss the possibility of searching for the $\Lam - \Lamb$ oscillations for coherent $\Lam\Lamb$ production in the J/$��\to \Lam \Lamb$ decay process. The sensitivity of measurement of $\Lam -\Lamb$ oscillation in the external field at BES-III experiment is considered. These considerations indicate an alternative way to probe the $��B =2$ amplitude in addition to neutron oscillation experiments. Both coherent and time-dependent information can be used to extract the $\Lam-\Lamb$ oscillation parameter. With one year's luminosity at BES-III, we can set an upper limit of $��m_{\Lam \Lamb} < 10^{-15}$ MeV at 90% confidence level, corresponding to about $10^{-6}$ s of $\Lam-\Lamb$ oscillation time., 4 pages, no figure, minor corrections to improve grammar, published in Phys.Rev.D as Rapid Communication.

Based on the data of BES and Belle, the production of $D\bar{D}$ in the $e^+e^-\to D\bar{D}$ scattering process is studied in this paper. We analyze the continuum and resonant contributions in the energy region from 3.7 to 4.4 GeV. In the $��^2$ fit to data, we obtain the resonance parameters of $��(3770)$, the branching ratio of $��(3770)\to D\bar{D}$ decay by confronting the data to the theoretical formula where both the contributions of the resonances, continuum and interference effects are included. We obtain the branching ratio of $��(3770)\to D\bar{D}$ decay is $97.2%\pm 8.9%$, as well as the branching ratio of $��(4040)$, $��(4160)\to D\bar{D}$ decays., 6 pages, 1 figure, 1 table, version to appear in Phys. Rev. D Rapid communications

In this paper, we intend to study the problem of CP violation in $D$ meson by $D\to VV$ decay mode in which the T violating triple-product correlation is examined. That would undoubtedly be another excellent probe of New Physics beyond Standard Model. For the neutral $D$, we focus on direct CP violation without considering $D^0-\bar D^0$ oscillation. Experimentally, by a full angular analysis one may obtain such CP violating signals, and particularly it is worth mentioning that the upcoming large $D$ data samples at BES-III in Beijing will provide a great opportunity to perform it., 5 pages, 2 tables and 1 figure, version to appear in Phys. Lett. B

Making use of arc image gathering system that base on high-speed picture frequency CCD technique, we proceed arc imagine gathering and analysis on CJX1-12/22 AC contactor. During high-speed arc image dynamic shoot process, it inevitably exists noise that coming from many aspects influencing image quality. The arc image analysis mainly concentrates on many aspects such as the motion forms and trend of arc image, the arc chute function of subsection arc extinction and so on. For this kind of special goal, it requests image's edge clear and can be distinguished in order to prominent the function and influence of arc imagepsilas contour. This paper first applies the adaptive median filter to eliminate stochastic noise, and then uses Laplacian sharpening to enhance the edge and the detail of image. The simulation result indicates that this method can effectively remove the noise and the prominent the contour.

According to Hurwitz's criterion, this paper deduces the steady state borderline of steam turbine with AVR on the map of reactive capability curves, using the mathematical model of one machine infinite bus system. It extends steam turbine's safe range under exciting operation compared to generator without AVR, and presents a proposal for the reactive power service market.

In this paper, the cause and its serious hazard of the inter-turn short circuit fault on turbine generator rotor windings are analyzed. Furthermore the electromagnetic characteristics and mechanical characteristics as well as the correlative variety of the electrical parameters induced after inter-turn short circuit fault on turbine generator rotor windings are analyzed. Based on the fault characteristics that the excitation current increased while the reactive power output decreased relatively when the inter-turn short circuit happens, a fault characteristic mathematical model of inter-turn short circuit is founded considering the saturated situation of steam generators.

Node mobility is one of dominant factors causing decreased performance in mobile ad hoc networks and restricting network scalability. Selecting stable paths is an effective way to reduce the impact of node mobility. Current methods of selecting stable paths suffer from several shortcomings. They may need a hardware function support for geographical position location or cross-layer function support for sending signal strength information to upper layers. In this paper a new simple method for selecting stable paths is proposed. This method uses a Neighbor Change Ratio metric and does not require any hardware function or cross layer support. The method selects paths which have small hop counts and stable local topologies. An extension to the AODV routing protocol is used as an example of using the Neighbor Change Ratio metric. The resulting NCR-AODV protocol is simulated under various mobility and traffic scenarios. The results show that the NCR-AODV protocol has a lower long path break probability and improved network performance compared to the AODV protocol

Questions about detecting CP-violating decay process of $J/��\to K^0\bar{K}^0\to K_SK_S$ are discussed. Possible background and material regeneration effect are analyzed. The discussion can be directly extended to other vector quarkonium decays, like $��$, $��(2S)$ and $��\to K_S K_S$., 5 pages, 2 figures, Latex